Merge remote-tracking branch 'upstream/develop' into feature/image-view-load-anim/18186

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/components/structures/AutoHideScrollbar.tsx

@@ -61,7 +61,9 @@ export default class AutoHideScrollbar extends React.Component<IProps> {
             style={style}
             className={["mx_AutoHideScrollbar", className].join(" ")}
             onWheel={onWheel}
-            tabIndex={tabIndex}
+            // Firefox sometimes makes this element focusable due to
+            // overflow:scroll;, so force it out of tab order by default.
+            tabIndex={tabIndex ?? -1}
         >
             { children }
         </div>);

src/components/structures/BackdropPanel.tsx

@@ -0,0 +1,44 @@
+/*
+Copyright 2021 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { CSSProperties } from "react";
+
+interface IProps {
+    backgroundImage?: string;
+    blurMultiplier?: number;
+}
+
+export const BackdropPanel: React.FC<IProps> = ({ backgroundImage, blurMultiplier }) => {
+    if (!backgroundImage) return null;
+
+    const styles: CSSProperties = {};
+    if (blurMultiplier) {
+        const rootStyle = getComputedStyle(document.documentElement);
+        const blurValue = rootStyle.getPropertyValue('--lp-background-blur');
+        const pixelsValue = blurValue.replace('px', '');
+        const parsed = parseInt(pixelsValue, 10);
+        if (!isNaN(parsed)) {
+            styles.filter = `blur(${parsed * blurMultiplier}px)`;
+        }
+    }
+    return <div className="mx_BackdropPanel">
+        <img
+            style={styles}
+            className="mx_BackdropPanel--image"
+            src={backgroundImage} />
+    </div>;
+};
+export default BackdropPanel;

src/components/structures/CallEventGrouper.ts

@@ -25,11 +25,18 @@ import defaultDispatcher from "../../dispatcher/dispatcher";
 export enum CallEventGrouperEvent {
     StateChanged = "state_changed",
     SilencedChanged = "silenced_changed",
+    LengthChanged = "length_changed",
 }
 
+const CONNECTING_STATES = [
+    CallState.Connecting,
+    CallState.WaitLocalMedia,
+    CallState.CreateOffer,
+    CallState.CreateAnswer,
+];
+
 const SUPPORTED_STATES = [
     CallState.Connected,
-    CallState.Connecting,
     CallState.Ringing,
 ];
 
@@ -61,6 +68,10 @@ export default class CallEventGrouper extends EventEmitter {
         return [...this.events].find((event) => event.getType() === EventType.CallReject);
     }
 
+    private get selectAnswer(): MatrixEvent {
+        return [...this.events].find((event) => event.getType() === EventType.CallSelectAnswer);
+    }
+
     public get isVoice(): boolean {
         const invite = this.invite;
         if (!invite) return;
@@ -74,6 +85,19 @@ export default class CallEventGrouper extends EventEmitter {
         return this.hangup?.getContent()?.reason;
     }
 
+    public get rejectParty(): string {
+        return this.reject?.getSender();
+    }
+
+    public get gotRejected(): boolean {
+        return Boolean(this.reject);
+    }
+
+    public get duration(): Date {
+        if (!this.hangup || !this.selectAnswer) return;
+        return new Date(this.hangup.getDate().getTime() - this.selectAnswer.getDate().getTime());
+    }
+
     /**
      * Returns true if there are only events from the other side - we missed the call
      */
@@ -81,8 +105,12 @@ export default class CallEventGrouper extends EventEmitter {
         return ![...this.events].some((event) => event.sender?.userId === MatrixClientPeg.get().getUserId());
     }
 
-    private get callId(): string {
-        return [...this.events][0].getContent().call_id;
+    private get callId(): string | undefined {
+        return [...this.events][0]?.getContent()?.call_id;
+    }
+
+    private get roomId(): string | undefined {
+        return [...this.events][0]?.getRoomId();
     }
 
     private onSilencedCallsChanged = () => {
@@ -90,19 +118,29 @@ export default class CallEventGrouper extends EventEmitter {
         this.emit(CallEventGrouperEvent.SilencedChanged, newState);
     };
 
+    private onLengthChanged = (length: number): void => {
+        this.emit(CallEventGrouperEvent.LengthChanged, length);
+    };
+
     public answerCall = () => {
-        this.call?.answer();
+        defaultDispatcher.dispatch({
+            action: 'answer',
+            room_id: this.roomId,
+        });
     };
 
     public rejectCall = () => {
-        this.call?.reject();
+        defaultDispatcher.dispatch({
+            action: 'reject',
+            room_id: this.roomId,
+        });
     };
 
     public callBack = () => {
         defaultDispatcher.dispatch({
             action: 'place_call',
             type: this.isVoice ? CallType.Voice : CallType.Video,
-            room_id: [...this.events][0]?.getRoomId(),
+            room_id: this.roomId,
         });
     };
 
@@ -116,10 +154,13 @@ export default class CallEventGrouper extends EventEmitter {
     private setCallListeners() {
         if (!this.call) return;
         this.call.addListener(CallEvent.State, this.setState);
+        this.call.addListener(CallEvent.LengthChanged, this.onLengthChanged);
     }
 
     private setState = () => {
-        if (SUPPORTED_STATES.includes(this.call?.state)) {
+        if (CONNECTING_STATES.includes(this.call?.state)) {
+            this.state = CallState.Connecting;
+        } else if (SUPPORTED_STATES.includes(this.call?.state)) {
             this.state = this.call.state;
         } else {
             if (this.callWasMissed) this.state = CustomCallState.Missed;

src/components/structures/ContextMenu.tsx

@@ -16,7 +16,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { CSSProperties, RefObject, useRef, useState } from "react";
+import React, { CSSProperties, RefObject, SyntheticEvent, useRef, useState } from "react";
 import ReactDOM from "react-dom";
 import classNames from "classnames";
 
@@ -80,6 +80,10 @@ export interface IProps extends IPosition {
     managed?: boolean;
     wrapperClassName?: string;
 
+    // If true, this context menu will be mounted as a child to the parent container. Otherwise
+    // it will be mounted to a container at the root of the DOM.
+    mountAsChild?: boolean;
+
     // Function to be called on menu close
     onFinished();
     // on resize callback
@@ -390,7 +394,13 @@ export class ContextMenu extends React.PureComponent<IProps, IState> {
     }
 
     render(): React.ReactChild {
-        return ReactDOM.createPortal(this.renderMenu(), getOrCreateContainer());
+        if (this.props.mountAsChild) {
+            // Render as a child of the current parent
+            return this.renderMenu();
+        } else {
+            // Render as a child of a container at the root of the DOM
+            return ReactDOM.createPortal(this.renderMenu(), getOrCreateContainer());
+        }
     }
 }
 
@@ -461,10 +471,14 @@ type ContextMenuTuple<T> = [boolean, RefObject<T>, () => void, () => void, (val:
 export const useContextMenu = <T extends any = HTMLElement>(): ContextMenuTuple<T> => {
     const button = useRef<T>(null);
     const [isOpen, setIsOpen] = useState(false);
-    const open = () => {
+    const open = (ev?: SyntheticEvent) => {
+        ev?.preventDefault();
+        ev?.stopPropagation();
         setIsOpen(true);
     };
-    const close = () => {
+    const close = (ev?: SyntheticEvent) => {
+        ev?.preventDefault();
+        ev?.stopPropagation();
         setIsOpen(false);
     };
 

src/components/structures/EmbeddedPage.js

@@ -120,8 +120,7 @@ export default class EmbeddedPage extends React.PureComponent {
 
         const content = <div className={`${className}_body`}
             dangerouslySetInnerHTML={{ __html: this.state.page }}
-        >
-        </div>;
+        />;
 
         if (this.props.scrollbar) {
             return <AutoHideScrollbar className={classes}>

src/components/structures/GroupFilterPanel.tsx

@@ -15,6 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import type { EventSubscription } from "fbemitter";
 import React from 'react';
 import GroupFilterOrderStore from '../../stores/GroupFilterOrderStore';
 
@@ -30,22 +31,43 @@ import AutoHideScrollbar from "./AutoHideScrollbar";
 import SettingsStore from "../../settings/SettingsStore";
 import UserTagTile from "../views/elements/UserTagTile";
 import { replaceableComponent } from "../../utils/replaceableComponent";
+import UIStore from "../../stores/UIStore";
+
+interface IGroupFilterPanelProps {
+
+}
+
+// FIXME: Properly type this after migrating GroupFilterOrderStore.js to Typescript
+type OrderedTagsTemporaryType = Array<{}>;
+// FIXME: Properly type this after migrating GroupFilterOrderStore.js to Typescript
+type SelectedTagsTemporaryType = Array<{}>;
+
+interface IGroupFilterPanelState {
+    // FIXME: Properly type this after migrating GroupFilterOrderStore.js to Typescript
+    orderedTags: OrderedTagsTemporaryType;
+    // FIXME: Properly type this after migrating GroupFilterOrderStore.js to Typescript
+    selectedTags: SelectedTagsTemporaryType;
+}
 
 @replaceableComponent("structures.GroupFilterPanel")
-class GroupFilterPanel extends React.Component {
-    static contextType = MatrixClientContext;
+class GroupFilterPanel extends React.Component<IGroupFilterPanelProps, IGroupFilterPanelState> {
+    public static contextType = MatrixClientContext;
 
-    state = {
+    public state = {
         orderedTags: [],
         selectedTags: [],
     };
 
-    componentDidMount() {
-        this.unmounted = false;
-        this.context.on("Group.myMembership", this._onGroupMyMembership);
-        this.context.on("sync", this._onClientSync);
+    private ref = React.createRef<HTMLDivElement>();
+    private unmounted = false;
+    private groupFilterOrderStoreToken?: EventSubscription;
 
-        this._groupFilterOrderStoreToken = GroupFilterOrderStore.addListener(() => {
+    public componentDidMount() {
+        this.unmounted = false;
+        this.context.on("Group.myMembership", this.onGroupMyMembership);
+        this.context.on("sync", this.onClientSync);
+
+        this.groupFilterOrderStoreToken = GroupFilterOrderStore.addListener(() => {
             if (this.unmounted) {
                 return;
             }
@@ -56,23 +78,25 @@ class GroupFilterPanel extends React.Component {
         });
         // This could be done by anything with a matrix client
         dis.dispatch(GroupActions.fetchJoinedGroups(this.context));
+        UIStore.instance.trackElementDimensions("GroupPanel", this.ref.current);
     }
 
-    componentWillUnmount() {
+    public componentWillUnmount() {
         this.unmounted = true;
-        this.context.removeListener("Group.myMembership", this._onGroupMyMembership);
-        this.context.removeListener("sync", this._onClientSync);
-        if (this._groupFilterOrderStoreToken) {
-            this._groupFilterOrderStoreToken.remove();
+        this.context.removeListener("Group.myMembership", this.onGroupMyMembership);
+        this.context.removeListener("sync", this.onClientSync);
+        if (this.groupFilterOrderStoreToken) {
+            this.groupFilterOrderStoreToken.remove();
         }
+        UIStore.instance.stopTrackingElementDimensions("GroupPanel");
     }
 
-    _onGroupMyMembership = () => {
+    private onGroupMyMembership = () => {
         if (this.unmounted) return;
         dis.dispatch(GroupActions.fetchJoinedGroups(this.context));
     };
 
-    _onClientSync = (syncState, prevState) => {
+    private onClientSync = (syncState, prevState) => {
         // Consider the client reconnected if there is no error with syncing.
         // This means the state could be RECONNECTING, SYNCING, PREPARED or CATCHUP.
         const reconnected = syncState !== "ERROR" && prevState !== syncState;
@@ -82,18 +106,18 @@ class GroupFilterPanel extends React.Component {
         }
     };
 
-    onClick = e => {
+    private onClick = e => {
         // only dispatch if its not a no-op
         if (this.state.selectedTags.length > 0) {
             dis.dispatch({ action: 'deselect_tags' });
         }
     };
 
-    onClearFilterClick = ev => {
+    private onClearFilterClick = ev => {
         dis.dispatch({ action: 'deselect_tags' });
     };
 
-    renderGlobalIcon() {
+    private renderGlobalIcon() {
         if (!SettingsStore.getValue("feature_communities_v2_prototypes")) return null;
 
         return (
@@ -104,7 +128,7 @@ class GroupFilterPanel extends React.Component {
         );
     }
 
-    render() {
+    public render() {
         const DNDTagTile = sdk.getComponent('elements.DNDTagTile');
         const ActionButton = sdk.getComponent('elements.ActionButton');
 
@@ -147,7 +171,7 @@ class GroupFilterPanel extends React.Component {
             );
         }
 
-        return <div className={classes} onClick={this.onClearFilterClick}>
+        return <div className={classes} onClick={this.onClearFilterClick} ref={this.ref}>
             <AutoHideScrollbar
                 className="mx_GroupFilterPanel_scroller"
                 onClick={this.onClick}

src/components/structures/GroupView.js

@@ -41,6 +41,9 @@ import RightPanelStore from "../../stores/RightPanelStore";
 import AutoHideScrollbar from "./AutoHideScrollbar";
 import { mediaFromMxc } from "../../customisations/Media";
 import { replaceableComponent } from "../../utils/replaceableComponent";
+import { createSpaceFromCommunity } from "../../utils/space";
+import { Action } from "../../dispatcher/actions";
+import { RightPanelPhases } from "../../stores/RightPanelStorePhases";
 
 const LONG_DESC_PLACEHOLDER = _td(
     `<h1>HTML for your community's page</h1>
@@ -222,7 +225,7 @@ class FeaturedRoom extends React.Component {
 
         let roomNameNode = null;
         if (permalink) {
-            roomNameNode = <a href={permalink} onClick={this.onClick} >{ roomName }</a>;
+            roomNameNode = <a href={permalink} onClick={this.onClick}>{ roomName }</a>;
         } else {
             roomNameNode = <span>{ roomName }</span>;
         }
@@ -399,6 +402,8 @@ class FeaturedUser extends React.Component {
 const GROUP_JOINPOLICY_OPEN = "open";
 const GROUP_JOINPOLICY_INVITE = "invite";
 
+const UPGRADE_NOTICE_LS_KEY = "mx_hide_community_upgrade_notice";
+
 @replaceableComponent("structures.GroupView")
 export default class GroupView extends React.Component {
     static propTypes = {
@@ -422,6 +427,7 @@ export default class GroupView extends React.Component {
         publicityBusy: false,
         inviterProfile: null,
         showRightPanel: RightPanelStore.getSharedInstance().isOpenForGroup,
+        showUpgradeNotice: !localStorage.getItem(UPGRADE_NOTICE_LS_KEY),
     };
 
     componentDidMount() {
@@ -807,6 +813,22 @@ export default class GroupView extends React.Component {
         showGroupAddRoomDialog(this.props.groupId);
     };
 
+    _dismissUpgradeNotice = () => {
+        localStorage.setItem(UPGRADE_NOTICE_LS_KEY, "true");
+        this.setState({ showUpgradeNotice: false });
+    }
+
+    _onCreateSpaceClick = () => {
+        createSpaceFromCommunity(this._matrixClient, this.props.groupId);
+    };
+
+    _onAdminsLinkClick = () => {
+        dis.dispatch({
+            action: Action.SetRightPanelPhase,
+            phase: RightPanelPhases.GroupMemberList,
+        });
+    };
+
     _getGroupSection() {
         const groupSettingsSectionClasses = classnames({
             "mx_GroupView_group": this.state.editing,
@@ -843,10 +865,46 @@ export default class GroupView extends React.Component {
                     },
                 ) }
             </div> : <div />;
+
+        let communitiesUpgradeNotice;
+        if (this.state.showUpgradeNotice) {
+            let text;
+            if (this.state.isUserPrivileged) {
+                text = _t("You can create a Space from this community <a>here</a>.", {}, {
+                    a: sub => <AccessibleButton onClick={this._onCreateSpaceClick} kind="link">
+                        { sub }
+                    </AccessibleButton>,
+                });
+            } else {
+                text = _t("Ask the <a>admins</a> of this community to make it into a Space " +
+                    "and keep a look out for the invite.", {}, {
+                    a: sub => <AccessibleButton onClick={this._onAdminsLinkClick} kind="link">
+                        { sub }
+                    </AccessibleButton>,
+                });
+            }
+
+            communitiesUpgradeNotice = <div className="mx_GroupView_spaceUpgradePrompt">
+                <h2>{ _t("Communities can now be made into Spaces") }</h2>
+                <p>
+                    { _t("Spaces are a new way to make a community, with new features coming.") }
+                    &nbsp;
+                    { text }
+                    &nbsp;
+                    { _t("Communities won't receive further updates.") }
+                </p>
+                <AccessibleButton
+                    className="mx_GroupView_spaceUpgradePrompt_close"
+                    onClick={this._dismissUpgradeNotice}
+                />
+            </div>;
+        }
+
         return <div className={groupSettingsSectionClasses}>
             { header }
             { hostingSignup }
             { changeDelayWarning }
+            { communitiesUpgradeNotice }
             { this._getJoinableNode() }
             { this._getLongDescriptionNode() }
             { this._getRoomsNode() }
@@ -1185,10 +1243,13 @@ export default class GroupView extends React.Component {
                     avatarImage = <Spinner />;
                 } else {
                     const GroupAvatar = sdk.getComponent('avatars.GroupAvatar');
-                    avatarImage = <GroupAvatar groupId={this.props.groupId}
+                    avatarImage = <GroupAvatar
+                        groupId={this.props.groupId}
                         groupName={this.state.profileForm.name}
                         groupAvatarUrl={this.state.profileForm.avatar_url}
-                        width={28} height={28} resizeMethod='crop'
+                        width={28}
+                        height={28}
+                        resizeMethod='crop'
                     />;
                 }
 
@@ -1199,9 +1260,12 @@ export default class GroupView extends React.Component {
                         </label>
                         <div className="mx_GroupView_avatarPicker_edit">
                             <label htmlFor="avatarInput" className="mx_GroupView_avatarPicker_label">
-                                <img src={require("../../../res/img/camera.svg")}
-                                    alt={_t("Upload avatar")} title={_t("Upload avatar")}
-                                    width="17" height="15" />
+                                <img
+                                    src={require("../../../res/img/camera.svg")}
+                                    alt={_t("Upload avatar")}
+                                    title={_t("Upload avatar")}
+                                    width="17"
+                                    height="15" />
                             </label>
                             <input id="avatarInput" className="mx_GroupView_uploadInput" type="file" onChange={this._onAvatarSelected} />
                         </div>
@@ -1238,7 +1302,8 @@ export default class GroupView extends React.Component {
                     groupAvatarUrl={groupAvatarUrl}
                     groupName={groupName}
                     onClick={onGroupHeaderItemClick}
-                    width={28} height={28}
+                    width={28}
+                    height={28}
                 />;
                 if (summary.profile && summary.profile.name) {
                     nameNode = <div onClick={onGroupHeaderItemClick}>
@@ -1269,28 +1334,32 @@ export default class GroupView extends React.Component {
                         key="_cancelButton"
                         onClick={this._onCancelClick}
                     >
-                        <img src={require("../../../res/img/cancel.svg")} className="mx_filterFlipColor"
-                            width="18" height="18" alt={_t("Cancel")} />
+                        <img
+                            src={require("../../../res/img/cancel.svg")}
+                            className="mx_filterFlipColor"
+                            width="18"
+                            height="18"
+                            alt={_t("Cancel")} />
                     </AccessibleButton>,
                 );
             } else {
                 if (summary.user && summary.user.membership === 'join') {
                     rightButtons.push(
-                        <AccessibleButton className="mx_GroupHeader_button mx_GroupHeader_editButton"
+                        <AccessibleButton
+                            className="mx_GroupHeader_button mx_GroupHeader_editButton"
                             key="_editButton"
                             onClick={this._onEditClick}
                             title={_t("Community Settings")}
-                        >
-                        </AccessibleButton>,
+                        />,
                     );
                 }
                 rightButtons.push(
-                    <AccessibleButton className="mx_GroupHeader_button mx_GroupHeader_shareButton"
+                    <AccessibleButton
+                        className="mx_GroupHeader_button mx_GroupHeader_shareButton"
                         key="_shareButton"
                         onClick={this._onShareClick}
                         title={_t('Share Community')}
-                    >
-                    </AccessibleButton>,
+                    />,
                 );
             }
 

src/components/structures/InteractiveAuth.js

@@ -1,300 +0,0 @@
-/*
-Copyright 2017 Vector Creations Ltd.
-Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import { InteractiveAuth } from "matrix-js-sdk/src/interactive-auth";
-import React, { createRef } from 'react';
-import PropTypes from 'prop-types';
-
-import getEntryComponentForLoginType from '../views/auth/InteractiveAuthEntryComponents';
-
-import * as sdk from '../../index';
-import { replaceableComponent } from "../../utils/replaceableComponent";
-
-export const ERROR_USER_CANCELLED = new Error("User cancelled auth session");
-
-@replaceableComponent("structures.InteractiveAuthComponent")
-export default class InteractiveAuthComponent extends React.Component {
-    static propTypes = {
-        // matrix client to use for UI auth requests
-        matrixClient: PropTypes.object.isRequired,
-
-        // response from initial request. If not supplied, will do a request on
-        // mount.
-        authData: PropTypes.shape({
-            flows: PropTypes.array,
-            params: PropTypes.object,
-            session: PropTypes.string,
-        }),
-
-        // callback
-        makeRequest: PropTypes.func.isRequired,
-
-        // callback called when the auth process has finished,
-        // successfully or unsuccessfully.
-        // @param {bool} status True if the operation requiring
-        //     auth was completed sucessfully, false if canceled.
-        // @param {object} result The result of the authenticated call
-        //     if successful, otherwise the error object.
-        // @param {object} extra Additional information about the UI Auth
-        //     process:
-        //      * emailSid {string} If email auth was performed, the sid of
-        //            the auth session.
-        //      * clientSecret {string} The client secret used in auth
-        //            sessions with the identity server.
-        onAuthFinished: PropTypes.func.isRequired,
-
-        // Inputs provided by the user to the auth process
-        // and used by various stages. As passed to js-sdk
-        // interactive-auth
-        inputs: PropTypes.object,
-
-        // As js-sdk interactive-auth
-        requestEmailToken: PropTypes.func,
-        sessionId: PropTypes.string,
-        clientSecret: PropTypes.string,
-        emailSid: PropTypes.string,
-
-        // If true, poll to see if the auth flow has been completed
-        // out-of-band
-        poll: PropTypes.bool,
-
-        // If true, components will be told that the 'Continue' button
-        // is managed by some other party and should not be managed by
-        // the component itself.
-        continueIsManaged: PropTypes.bool,
-
-        // Called when the stage changes, or the stage's phase changes. First
-        // argument is the stage, second is the phase. Some stages do not have
-        // phases and will be counted as 0 (numeric).
-        onStagePhaseChange: PropTypes.func,
-
-        // continueText and continueKind are passed straight through to the AuthEntryComponent.
-        continueText: PropTypes.string,
-        continueKind: PropTypes.string,
-    };
-
-    constructor(props) {
-        super(props);
-
-        this.state = {
-            authStage: null,
-            busy: false,
-            errorText: null,
-            stageErrorText: null,
-            submitButtonEnabled: false,
-        };
-
-        this._unmounted = false;
-        this._authLogic = new InteractiveAuth({
-            authData: this.props.authData,
-            doRequest: this._requestCallback,
-            busyChanged: this._onBusyChanged,
-            inputs: this.props.inputs,
-            stateUpdated: this._authStateUpdated,
-            matrixClient: this.props.matrixClient,
-            sessionId: this.props.sessionId,
-            clientSecret: this.props.clientSecret,
-            emailSid: this.props.emailSid,
-            requestEmailToken: this._requestEmailToken,
-        });
-
-        this._intervalId = null;
-        if (this.props.poll) {
-            this._intervalId = setInterval(() => {
-                this._authLogic.poll();
-            }, 2000);
-        }
-
-        this._stageComponent = createRef();
-    }
-
-    // TODO: [REACT-WARNING] Replace component with real class, use constructor for refs
-    UNSAFE_componentWillMount() { // eslint-disable-line camelcase
-        this._authLogic.attemptAuth().then((result) => {
-            const extra = {
-                emailSid: this._authLogic.getEmailSid(),
-                clientSecret: this._authLogic.getClientSecret(),
-            };
-            this.props.onAuthFinished(true, result, extra);
-        }).catch((error) => {
-            this.props.onAuthFinished(false, error);
-            console.error("Error during user-interactive auth:", error);
-            if (this._unmounted) {
-                return;
-            }
-
-            const msg = error.message || error.toString();
-            this.setState({
-                errorText: msg,
-            });
-        });
-    }
-
-    componentWillUnmount() {
-        this._unmounted = true;
-
-        if (this._intervalId !== null) {
-            clearInterval(this._intervalId);
-        }
-    }
-
-    _requestEmailToken = async (...args) => {
-        this.setState({
-            busy: true,
-        });
-        try {
-            return await this.props.requestEmailToken(...args);
-        } finally {
-            this.setState({
-                busy: false,
-            });
-        }
-    };
-
-    tryContinue = () => {
-        if (this._stageComponent.current && this._stageComponent.current.tryContinue) {
-            this._stageComponent.current.tryContinue();
-        }
-    };
-
-    _authStateUpdated = (stageType, stageState) => {
-        const oldStage = this.state.authStage;
-        this.setState({
-            busy: false,
-            authStage: stageType,
-            stageState: stageState,
-            errorText: stageState.error,
-        }, () => {
-            if (oldStage !== stageType) {
-                this._setFocus();
-            } else if (
-                !stageState.error && this._stageComponent.current &&
-                this._stageComponent.current.attemptFailed
-            ) {
-                this._stageComponent.current.attemptFailed();
-            }
-        });
-    };
-
-    _requestCallback = (auth) => {
-        // This wrapper just exists because the js-sdk passes a second
-        // 'busy' param for backwards compat. This throws the tests off
-        // so discard it here.
-        return this.props.makeRequest(auth);
-    };
-
-    _onBusyChanged = (busy) => {
-        // if we've started doing stuff, reset the error messages
-        if (busy) {
-            this.setState({
-                busy: true,
-                errorText: null,
-                stageErrorText: null,
-            });
-        }
-        // The JS SDK eagerly reports itself as "not busy" right after any
-        // immediate work has completed, but that's not really what we want at
-        // the UI layer, so we ignore this signal and show a spinner until
-        // there's a new screen to show the user. This is implemented by setting
-        // `busy: false` in `_authStateUpdated`.
-        // See also https://github.com/vector-im/element-web/issues/12546
-    };
-
-    _setFocus() {
-        if (this._stageComponent.current && this._stageComponent.current.focus) {
-            this._stageComponent.current.focus();
-        }
-    }
-
-    _submitAuthDict = authData => {
-        this._authLogic.submitAuthDict(authData);
-    };
-
-    _onPhaseChange = newPhase => {
-        if (this.props.onStagePhaseChange) {
-            this.props.onStagePhaseChange(this.state.authStage, newPhase || 0);
-        }
-    };
-
-    _onStageCancel = () => {
-        this.props.onAuthFinished(false, ERROR_USER_CANCELLED);
-    };
-
-    _renderCurrentStage() {
-        const stage = this.state.authStage;
-        if (!stage) {
-            if (this.state.busy) {
-                const Loader = sdk.getComponent("elements.Spinner");
-                return <Loader />;
-            } else {
-                return null;
-            }
-        }
-
-        const StageComponent = getEntryComponentForLoginType(stage);
-        return (
-            <StageComponent
-                ref={this._stageComponent}
-                loginType={stage}
-                matrixClient={this.props.matrixClient}
-                authSessionId={this._authLogic.getSessionId()}
-                clientSecret={this._authLogic.getClientSecret()}
-                stageParams={this._authLogic.getStageParams(stage)}
-                submitAuthDict={this._submitAuthDict}
-                errorText={this.state.stageErrorText}
-                busy={this.state.busy}
-                inputs={this.props.inputs}
-                stageState={this.state.stageState}
-                fail={this._onAuthStageFailed}
-                setEmailSid={this._setEmailSid}
-                showContinue={!this.props.continueIsManaged}
-                onPhaseChange={this._onPhaseChange}
-                continueText={this.props.continueText}
-                continueKind={this.props.continueKind}
-                onCancel={this._onStageCancel}
-            />
-        );
-    }
-
-    _onAuthStageFailed = e => {
-        this.props.onAuthFinished(false, e);
-    };
-
-    _setEmailSid = sid => {
-        this._authLogic.setEmailSid(sid);
-    };
-
-    render() {
-        let error = null;
-        if (this.state.errorText) {
-            error = (
-                <div className="error">
-                    { this.state.errorText }
-                </div>
-            );
-        }
-
-        return (
-            <div>
-                <div>
-                    { this._renderCurrentStage() }
-                    { error }
-                </div>
-            </div>
-        );
-    }
-}

src/components/structures/InteractiveAuth.tsx

@@ -0,0 +1,300 @@
+/*
+Copyright 2017 - 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import {
+    AuthType,
+    IAuthData,
+    IAuthDict,
+    IInputs,
+    InteractiveAuth,
+    IStageStatus,
+} from "matrix-js-sdk/src/interactive-auth";
+import { MatrixClient } from "matrix-js-sdk/src/client";
+import React, { createRef } from 'react';
+
+import getEntryComponentForLoginType, { IStageComponent } from '../views/auth/InteractiveAuthEntryComponents';
+import Spinner from "../views/elements/Spinner";
+import { replaceableComponent } from "../../utils/replaceableComponent";
+
+export const ERROR_USER_CANCELLED = new Error("User cancelled auth session");
+
+interface IProps {
+    // matrix client to use for UI auth requests
+    matrixClient: MatrixClient;
+    // response from initial request. If not supplied, will do a request on mount.
+    authData?: IAuthData;
+    // Inputs provided by the user to the auth process
+    // and used by various stages. As passed to js-sdk
+    // interactive-auth
+    inputs?: IInputs;
+    sessionId?: string;
+    clientSecret?: string;
+    emailSid?: string;
+    // If true, poll to see if the auth flow has been completed out-of-band
+    poll?: boolean;
+    // If true, components will be told that the 'Continue' button
+    // is managed by some other party and should not be managed by
+    // the component itself.
+    continueIsManaged?: boolean;
+    // continueText and continueKind are passed straight through to the AuthEntryComponent.
+    continueText?: string;
+    continueKind?: string;
+    // callback
+    makeRequest(auth: IAuthData): Promise<IAuthData>;
+    // callback called when the auth process has finished,
+    // successfully or unsuccessfully.
+    // @param {boolean} status True if the operation requiring
+    //     auth was completed successfully, false if canceled.
+    // @param {object} result The result of the authenticated call
+    //     if successful, otherwise the error object.
+    // @param {object} extra Additional information about the UI Auth
+    //     process:
+    //      * emailSid {string} If email auth was performed, the sid of
+    //            the auth session.
+    //      * clientSecret {string} The client secret used in auth
+    //            sessions with the ID server.
+    onAuthFinished(
+        status: boolean,
+        result: IAuthData | Error,
+        extra?: { emailSid?: string, clientSecret?: string },
+    ): void;
+    // As js-sdk interactive-auth
+    requestEmailToken?(email: string, secret: string, attempt: number, session: string): Promise<{ sid: string }>;
+    // Called when the stage changes, or the stage's phase changes. First
+    // argument is the stage, second is the phase. Some stages do not have
+    // phases and will be counted as 0 (numeric).
+    onStagePhaseChange?(stage: string, phase: string | number): void;
+}
+
+interface IState {
+    authStage?: AuthType;
+    stageState?: IStageStatus;
+    busy: boolean;
+    errorText?: string;
+    stageErrorText?: string;
+    submitButtonEnabled: boolean;
+}
+
+@replaceableComponent("structures.InteractiveAuthComponent")
+export default class InteractiveAuthComponent extends React.Component<IProps, IState> {
+    private readonly authLogic: InteractiveAuth;
+    private readonly intervalId: number = null;
+    private readonly stageComponent = createRef<IStageComponent>();
+
+    private unmounted = false;
+
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            authStage: null,
+            busy: false,
+            errorText: null,
+            stageErrorText: null,
+            submitButtonEnabled: false,
+        };
+
+        this.authLogic = new InteractiveAuth({
+            authData: this.props.authData,
+            doRequest: this.requestCallback,
+            busyChanged: this.onBusyChanged,
+            inputs: this.props.inputs,
+            stateUpdated: this.authStateUpdated,
+            matrixClient: this.props.matrixClient,
+            sessionId: this.props.sessionId,
+            clientSecret: this.props.clientSecret,
+            emailSid: this.props.emailSid,
+            requestEmailToken: this.requestEmailToken,
+        });
+
+        if (this.props.poll) {
+            this.intervalId = setInterval(() => {
+                this.authLogic.poll();
+            }, 2000);
+        }
+    }
+
+    // TODO: [REACT-WARNING] Replace component with real class, use constructor for refs
+    UNSAFE_componentWillMount() { // eslint-disable-line @typescript-eslint/naming-convention, camelcase
+        this.authLogic.attemptAuth().then((result) => {
+            const extra = {
+                emailSid: this.authLogic.getEmailSid(),
+                clientSecret: this.authLogic.getClientSecret(),
+            };
+            this.props.onAuthFinished(true, result, extra);
+        }).catch((error) => {
+            this.props.onAuthFinished(false, error);
+            console.error("Error during user-interactive auth:", error);
+            if (this.unmounted) {
+                return;
+            }
+
+            const msg = error.message || error.toString();
+            this.setState({
+                errorText: msg,
+            });
+        });
+    }
+
+    componentWillUnmount() {
+        this.unmounted = true;
+
+        if (this.intervalId !== null) {
+            clearInterval(this.intervalId);
+        }
+    }
+
+    private requestEmailToken = async (
+        email: string,
+        secret: string,
+        attempt: number,
+        session: string,
+    ): Promise<{sid: string}> => {
+        this.setState({
+            busy: true,
+        });
+        try {
+            return await this.props.requestEmailToken(email, secret, attempt, session);
+        } finally {
+            this.setState({
+                busy: false,
+            });
+        }
+    };
+
+    private tryContinue = (): void => {
+        this.stageComponent.current?.tryContinue?.();
+    };
+
+    private authStateUpdated = (stageType: AuthType, stageState: IStageStatus): void => {
+        const oldStage = this.state.authStage;
+        this.setState({
+            busy: false,
+            authStage: stageType,
+            stageState: stageState,
+            errorText: stageState.error,
+        }, () => {
+            if (oldStage !== stageType) {
+                this.setFocus();
+            } else if (!stageState.error) {
+                this.stageComponent.current?.attemptFailed?.();
+            }
+        });
+    };
+
+    private requestCallback = (auth: IAuthData, background: boolean): Promise<IAuthData> => {
+        // This wrapper just exists because the js-sdk passes a second
+        // 'busy' param for backwards compat. This throws the tests off
+        // so discard it here.
+        return this.props.makeRequest(auth);
+    };
+
+    private onBusyChanged = (busy: boolean): void => {
+        // if we've started doing stuff, reset the error messages
+        if (busy) {
+            this.setState({
+                busy: true,
+                errorText: null,
+                stageErrorText: null,
+            });
+        }
+        // The JS SDK eagerly reports itself as "not busy" right after any
+        // immediate work has completed, but that's not really what we want at
+        // the UI layer, so we ignore this signal and show a spinner until
+        // there's a new screen to show the user. This is implemented by setting
+        // `busy: false` in `authStateUpdated`.
+        // See also https://github.com/vector-im/element-web/issues/12546
+    };
+
+    private setFocus(): void {
+        this.stageComponent.current?.focus?.();
+    }
+
+    private submitAuthDict = (authData: IAuthDict): void => {
+        this.authLogic.submitAuthDict(authData);
+    };
+
+    private onPhaseChange = (newPhase: number): void => {
+        this.props.onStagePhaseChange?.(this.state.authStage, newPhase || 0);
+    };
+
+    private onStageCancel = (): void => {
+        this.props.onAuthFinished(false, ERROR_USER_CANCELLED);
+    };
+
+    private renderCurrentStage(): JSX.Element {
+        const stage = this.state.authStage;
+        if (!stage) {
+            if (this.state.busy) {
+                return <Spinner />;
+            } else {
+                return null;
+            }
+        }
+
+        const StageComponent = getEntryComponentForLoginType(stage);
+        return (
+            <StageComponent
+                ref={this.stageComponent as any}
+                loginType={stage}
+                matrixClient={this.props.matrixClient}
+                authSessionId={this.authLogic.getSessionId()}
+                clientSecret={this.authLogic.getClientSecret()}
+                stageParams={this.authLogic.getStageParams(stage)}
+                submitAuthDict={this.submitAuthDict}
+                errorText={this.state.stageErrorText}
+                busy={this.state.busy}
+                inputs={this.props.inputs}
+                stageState={this.state.stageState}
+                fail={this.onAuthStageFailed}
+                setEmailSid={this.setEmailSid}
+                showContinue={!this.props.continueIsManaged}
+                onPhaseChange={this.onPhaseChange}
+                continueText={this.props.continueText}
+                continueKind={this.props.continueKind}
+                onCancel={this.onStageCancel}
+            />
+        );
+    }
+
+    private onAuthStageFailed = (e: Error): void => {
+        this.props.onAuthFinished(false, e);
+    };
+
+    private setEmailSid = (sid: string): void => {
+        this.authLogic.setEmailSid(sid);
+    };
+
+    render() {
+        let error = null;
+        if (this.state.errorText) {
+            error = (
+                <div className="error">
+                    { this.state.errorText }
+                </div>
+            );
+        }
+
+        return (
+            <div>
+                <div>
+                    { this.renderCurrentStage() }
+                    { error }
+                </div>
+            </div>
+        );
+    }
+}

src/components/structures/LeftPanel.tsx

@@ -19,8 +19,6 @@ import { createRef } from "react";
 import classNames from "classnames";
 import { Room } from "matrix-js-sdk/src/models/room";
 
-import GroupFilterPanel from "./GroupFilterPanel";
-import CustomRoomTagPanel from "./CustomRoomTagPanel";
 import dis from "../../dispatcher/dispatcher";
 import { _t } from "../../languageHandler";
 import RoomList from "../views/rooms/RoomList";
@@ -33,15 +31,12 @@ import RoomBreadcrumbs from "../views/rooms/RoomBreadcrumbs";
 import { BreadcrumbsStore } from "../../stores/BreadcrumbsStore";
 import { UPDATE_EVENT } from "../../stores/AsyncStore";
 import ResizeNotifier from "../../utils/ResizeNotifier";
-import SettingsStore from "../../settings/SettingsStore";
 import RoomListStore, { LISTS_UPDATE_EVENT } from "../../stores/room-list/RoomListStore";
 import IndicatorScrollbar from "../structures/IndicatorScrollbar";
 import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
-import { OwnProfileStore } from "../../stores/OwnProfileStore";
 import RoomListNumResults from "../views/rooms/RoomListNumResults";
 import LeftPanelWidget from "./LeftPanelWidget";
 import { replaceableComponent } from "../../utils/replaceableComponent";
-import { mediaFromMxc } from "../../customisations/Media";
 import SpaceStore, { UPDATE_SELECTED_SPACE } from "../../stores/SpaceStore";
 import { getKeyBindingsManager, RoomListAction } from "../../KeyBindingsManager";
 import UIStore from "../../stores/UIStore";
@@ -53,7 +48,6 @@ interface IProps {
 
 interface IState {
     showBreadcrumbs: boolean;
-    showGroupFilterPanel: boolean;
     activeSpace?: Room;
 }
 
@@ -70,8 +64,6 @@ const cssClasses = [
 export default class LeftPanel extends React.Component<IProps, IState> {
     private ref: React.RefObject<HTMLDivElement> = createRef();
     private listContainerRef: React.RefObject<HTMLDivElement> = createRef();
-    private groupFilterPanelWatcherRef: string;
-    private bgImageWatcherRef: string;
     private focusedElement = null;
     private isDoingStickyHeaders = false;
 
@@ -80,22 +72,16 @@ export default class LeftPanel extends React.Component<IProps, IState> {
 
         this.state = {
             showBreadcrumbs: BreadcrumbsStore.instance.visible,
-            showGroupFilterPanel: SettingsStore.getValue('TagPanel.enableTagPanel'),
             activeSpace: SpaceStore.instance.activeSpace,
         };
 
         BreadcrumbsStore.instance.on(UPDATE_EVENT, this.onBreadcrumbsUpdate);
         RoomListStore.instance.on(LISTS_UPDATE_EVENT, this.onBreadcrumbsUpdate);
-        OwnProfileStore.instance.on(UPDATE_EVENT, this.onBackgroundImageUpdate);
         SpaceStore.instance.on(UPDATE_SELECTED_SPACE, this.updateActiveSpace);
-        this.bgImageWatcherRef = SettingsStore.watchSetting(
-            "RoomList.backgroundImage", null, this.onBackgroundImageUpdate);
-        this.groupFilterPanelWatcherRef = SettingsStore.watchSetting("TagPanel.enableTagPanel", null, () => {
-            this.setState({ showGroupFilterPanel: SettingsStore.getValue("TagPanel.enableTagPanel") });
-        });
     }
 
     public componentDidMount() {
+        UIStore.instance.trackElementDimensions("LeftPanel", this.ref.current);
         UIStore.instance.trackElementDimensions("ListContainer", this.listContainerRef.current);
         UIStore.instance.on("ListContainer", this.refreshStickyHeaders);
         // Using the passive option to not block the main thread
@@ -104,11 +90,8 @@ export default class LeftPanel extends React.Component<IProps, IState> {
     }
 
     public componentWillUnmount() {
-        SettingsStore.unwatchSetting(this.groupFilterPanelWatcherRef);
-        SettingsStore.unwatchSetting(this.bgImageWatcherRef);
         BreadcrumbsStore.instance.off(UPDATE_EVENT, this.onBreadcrumbsUpdate);
         RoomListStore.instance.off(LISTS_UPDATE_EVENT, this.onBreadcrumbsUpdate);
-        OwnProfileStore.instance.off(UPDATE_EVENT, this.onBackgroundImageUpdate);
         SpaceStore.instance.off(UPDATE_SELECTED_SPACE, this.updateActiveSpace);
         UIStore.instance.stopTrackingElementDimensions("ListContainer");
         UIStore.instance.removeListener("ListContainer", this.refreshStickyHeaders);
@@ -149,23 +132,6 @@ export default class LeftPanel extends React.Component<IProps, IState> {
         }
     };
 
-    private onBackgroundImageUpdate = () => {
-        // Note: we do this in the LeftPanel as it uses this variable most prominently.
-        const avatarSize = 32; // arbitrary
-        let avatarUrl = OwnProfileStore.instance.getHttpAvatarUrl(avatarSize);
-        const settingBgMxc = SettingsStore.getValue("RoomList.backgroundImage");
-        if (settingBgMxc) {
-            avatarUrl = mediaFromMxc(settingBgMxc).getSquareThumbnailHttp(avatarSize);
-        }
-
-        const avatarUrlProp = `url(${avatarUrl})`;
-        if (!avatarUrl) {
-            document.body.style.removeProperty("--avatar-url");
-        } else if (document.body.style.getPropertyValue("--avatar-url") !== avatarUrlProp) {
-            document.body.style.setProperty("--avatar-url", avatarUrlProp);
-        }
-    };
-
     private handleStickyHeaders(list: HTMLDivElement) {
         if (this.isDoingStickyHeaders) return;
         this.isDoingStickyHeaders = true;
@@ -392,9 +358,6 @@ export default class LeftPanel extends React.Component<IProps, IState> {
                 <IndicatorScrollbar
                     className="mx_LeftPanel_breadcrumbsContainer mx_AutoHideScrollbar"
                     verticalScrollsHorizontally={true}
-                    // Firefox sometimes makes this element focusable due to
-                    // overflow:scroll;, so force it out of tab order.
-                    tabIndex={-1}
                 >
                     <RoomBreadcrumbs />
                 </IndicatorScrollbar>
@@ -436,23 +399,15 @@ export default class LeftPanel extends React.Component<IProps, IState> {
                         mx_LeftPanel_exploreButton_space: !!this.state.activeSpace,
                     })}
                     onClick={this.onExplore}
-                    title={_t("Explore rooms")}
+                    title={this.state.activeSpace
+                        ? _t("Explore %(spaceName)s", { spaceName: this.state.activeSpace.name })
+                        : _t("Explore rooms")}
                 />
             </div>
         );
     }
 
     public render(): React.ReactNode {
-        let leftLeftPanel;
-        if (this.state.showGroupFilterPanel) {
-            leftLeftPanel = (
-                <div className="mx_LeftPanel_GroupFilterPanelContainer">
-                    <GroupFilterPanel />
-                    { SettingsStore.getValue("feature_custom_tags") ? <CustomRoomTagPanel /> : null }
-                </div>
-            );
-        }
-
         const roomList = <RoomList
             onKeyDown={this.onKeyDown}
             resizeNotifier={this.props.resizeNotifier}
@@ -476,7 +431,6 @@ export default class LeftPanel extends React.Component<IProps, IState> {
 
         return (
             <div className={containerClasses} ref={this.ref}>
-                { leftLeftPanel }
                 <aside className="mx_LeftPanel_roomListContainer">
                     { this.renderHeader() }
                     { this.renderSearchDialExplore() }

src/components/structures/LeftPanelWidget.tsx

@@ -115,7 +115,7 @@ const LeftPanelWidget: React.FC = () => {
                     aria-expanded={expanded}
                     aria-level={1}
                     onClick={() => {
-                        setExpanded(e => !e);
+                        setExpanded(!expanded);
                     }}
                 >
                     <span className={classNames({

src/components/structures/LoggedInView.tsx

@@ -1,7 +1,5 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017 Vector Creations Ltd
-Copyright 2017, 2018, 2020 New Vector Ltd
+Copyright 2015 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -55,15 +53,22 @@ import { getKeyBindingsManager, NavigationAction, RoomAction } from '../../KeyBi
 import { IOpts } from "../../createRoom";
 import SpacePanel from "../views/spaces/SpacePanel";
 import { replaceableComponent } from "../../utils/replaceableComponent";
-import CallHandler, { CallHandlerEvent } from '../../CallHandler';
+import CallHandler from '../../CallHandler';
 import { MatrixCall } from 'matrix-js-sdk/src/webrtc/call';
 import AudioFeedArrayForCall from '../views/voip/AudioFeedArrayForCall';
+import { OwnProfileStore } from '../../stores/OwnProfileStore';
+import { UPDATE_EVENT } from "../../stores/AsyncStore";
 import RoomView from './RoomView';
 import ToastContainer from './ToastContainer';
 import MyGroups from "./MyGroups";
 import UserView from "./UserView";
 import GroupView from "./GroupView";
+import BackdropPanel from "./BackdropPanel";
 import SpaceStore from "../../stores/SpaceStore";
+import classNames from 'classnames';
+import GroupFilterPanel from './GroupFilterPanel';
+import CustomRoomTagPanel from './CustomRoomTagPanel';
+import { mediaFromMxc } from "../../customisations/Media";
 
 // We need to fetch each pinned message individually (if we don't already have it)
 // so each pinned message may trigger a request. Limit the number per room for sanity.
@@ -127,6 +132,7 @@ interface IState {
     usageLimitEventTs?: number;
     useCompactLayout: boolean;
     activeCalls: Array<MatrixCall>;
+    backgroundImage?: string;
 }
 
 /**
@@ -142,10 +148,13 @@ interface IState {
 class LoggedInView extends React.Component<IProps, IState> {
     static displayName = 'LoggedInView';
 
+    private dispatcherRef: string;
     protected readonly _matrixClient: MatrixClient;
     protected readonly _roomView: React.RefObject<any>;
-    protected readonly _resizeContainer: React.RefObject<ResizeHandle>;
+    protected readonly _resizeContainer: React.RefObject<HTMLDivElement>;
+    protected readonly resizeHandler: React.RefObject<HTMLDivElement>;
     protected compactLayoutWatcherRef: string;
+    protected backgroundImageWatcherRef: string;
     protected resizer: Resizer;
 
     constructor(props, context) {
@@ -156,7 +165,7 @@ class LoggedInView extends React.Component<IProps, IState> {
             // use compact timeline view
             useCompactLayout: SettingsStore.getValue('useCompactLayout'),
             usageLimitDismissed: false,
-            activeCalls: [],
+            activeCalls: CallHandler.sharedInstance().getAllActiveCalls(),
         };
 
         // stash the MatrixClient in case we log out before we are unmounted
@@ -168,11 +177,12 @@ class LoggedInView extends React.Component<IProps, IState> {
 
         this._roomView = React.createRef();
         this._resizeContainer = React.createRef();
+        this.resizeHandler = React.createRef();
     }
 
     componentDidMount() {
         document.addEventListener('keydown', this.onNativeKeyDown, false);
-        CallHandler.sharedInstance().addListener(CallHandlerEvent.CallsChanged, this.onCallsChanged);
+        this.dispatcherRef = dis.register(this.onAction);
 
         this.updateServerNoticeEvents();
 
@@ -189,26 +199,51 @@ class LoggedInView extends React.Component<IProps, IState> {
         this.compactLayoutWatcherRef = SettingsStore.watchSetting(
             "useCompactLayout", null, this.onCompactLayoutChanged,
         );
+        this.backgroundImageWatcherRef = SettingsStore.watchSetting(
+            "RoomList.backgroundImage", null, this.refreshBackgroundImage,
+        );
 
         this.resizer = this.createResizer();
         this.resizer.attach();
+
+        OwnProfileStore.instance.on(UPDATE_EVENT, this.refreshBackgroundImage);
         this.loadResizerPreferences();
+        this.refreshBackgroundImage();
     }
 
     componentWillUnmount() {
         document.removeEventListener('keydown', this.onNativeKeyDown, false);
-        CallHandler.sharedInstance().removeListener(CallHandlerEvent.CallsChanged, this.onCallsChanged);
+        dis.unregister(this.dispatcherRef);
         this._matrixClient.removeListener("accountData", this.onAccountData);
         this._matrixClient.removeListener("sync", this.onSync);
         this._matrixClient.removeListener("RoomState.events", this.onRoomStateEvents);
+        OwnProfileStore.instance.off(UPDATE_EVENT, this.refreshBackgroundImage);
         SettingsStore.unwatchSetting(this.compactLayoutWatcherRef);
+        SettingsStore.unwatchSetting(this.backgroundImageWatcherRef);
         this.resizer.detach();
     }
 
-    private onCallsChanged = () => {
-        this.setState({
-            activeCalls: CallHandler.sharedInstance().getAllActiveCalls(),
-        });
+    private refreshBackgroundImage = async (): Promise<void> => {
+        let backgroundImage = SettingsStore.getValue("RoomList.backgroundImage");
+        if (backgroundImage) {
+            // convert to http before going much further
+            backgroundImage = mediaFromMxc(backgroundImage).srcHttp;
+        } else {
+            backgroundImage = OwnProfileStore.instance.getHttpAvatarUrl();
+        }
+        this.setState({ backgroundImage });
+    };
+
+    private onAction = (payload): void => {
+        switch (payload.action) {
+            case 'call_state': {
+                const activeCalls = CallHandler.sharedInstance().getAllActiveCalls();
+                if (activeCalls !== this.state.activeCalls) {
+                    this.setState({ activeCalls });
+                }
+                break;
+            }
+        }
     };
 
     public canResetTimelineInRoom = (roomId: string) => {
@@ -247,6 +282,7 @@ class LoggedInView extends React.Component<IProps, IState> {
             isItemCollapsed: domNode => {
                 return domNode.classList.contains("mx_LeftPanel_minimized");
             },
+            handler: this.resizeHandler.current,
         };
         const resizer = new Resizer(this._resizeContainer.current, CollapseDistributor, collapseConfig);
         resizer.setClassNames({
@@ -262,7 +298,7 @@ class LoggedInView extends React.Component<IProps, IState> {
         if (isNaN(lhsSize)) {
             lhsSize = 350;
         }
-        this.resizer.forHandleAt(0).resize(lhsSize);
+        this.resizer.forHandleWithId('lp-resizer').resize(lhsSize);
     }
 
     private onAccountData = (event: MatrixEvent) => {
@@ -529,24 +565,24 @@ class LoggedInView extends React.Component<IProps, IState> {
         }
 
         const isModifier = ev.key === Key.ALT || ev.key === Key.CONTROL || ev.key === Key.META || ev.key === Key.SHIFT;
-        if (!isModifier && !ev.altKey && !ev.ctrlKey && !ev.metaKey) {
+        if (!isModifier && !ev.ctrlKey && !ev.metaKey) {
             // The above condition is crafted to _allow_ characters with Shift
             // already pressed (but not the Shift key down itself).
-
             const isClickShortcut = ev.target !== document.body &&
                 (ev.key === Key.SPACE || ev.key === Key.ENTER);
 
-            // Do not capture the context menu key to improve keyboard accessibility
-            if (ev.key === Key.CONTEXT_MENU) {
-                return;
-            }
+            // We explicitly allow alt to be held due to it being a common accent modifier.
+            // XXX: Forwarding Dead keys in this way does not work as intended but better to at least
+            // move focus to the composer so the user can re-type the dead key correctly.
+            const isPrintable = ev.key.length === 1 || ev.key === "Dead";
 
-            if (!isClickShortcut && ev.key !== Key.TAB && !canElementReceiveInput(ev.target)) {
+            // If the user is entering a printable character outside of an input field
+            // redirect it to the composer for them.
+            if (!isClickShortcut && isPrintable && !canElementReceiveInput(ev.target)) {
                 // synchronous dispatch so we focus before key generates input
                 dis.fire(Action.FocusSendMessageComposer, true);
                 ev.stopPropagation();
-                // we should *not* preventDefault() here as
-                // that would prevent typing in the now-focussed composer
+                // we should *not* preventDefault() here as that would prevent typing in the now-focused composer
             }
         }
     };
@@ -601,10 +637,14 @@ class LoggedInView extends React.Component<IProps, IState> {
                 break;
         }
 
-        let bodyClasses = 'mx_MatrixChat';
-        if (this.state.useCompactLayout) {
-            bodyClasses += ' mx_MatrixChat_useCompactLayout';
-        }
+        const wrapperClasses = classNames({
+            'mx_MatrixChat_wrapper': true,
+            'mx_MatrixChat_useCompactLayout': this.state.useCompactLayout,
+        });
+        const bodyClasses = classNames({
+            'mx_MatrixChat': true,
+            'mx_MatrixChat--with-avatar': this.state.backgroundImage,
+        });
 
         const audioFeedArraysForCalls = this.state.activeCalls.map((call) => {
             return (
@@ -617,18 +657,47 @@ class LoggedInView extends React.Component<IProps, IState> {
                 <div
                     onPaste={this.onPaste}
                     onKeyDown={this.onReactKeyDown}
-                    className='mx_MatrixChat_wrapper'
+                    className={wrapperClasses}
                     aria-hidden={this.props.hideToSRUsers}
                 >
                     <ToastContainer />
-                    <div ref={this._resizeContainer} className={bodyClasses}>
-                        { SpaceStore.spacesEnabled ? <SpacePanel /> : null }
-                        <LeftPanel
-                            isMinimized={this.props.collapseLhs || false}
-                            resizeNotifier={this.props.resizeNotifier}
-                        />
-                        <ResizeHandle />
-                        { pageElement }
+                    <div className={bodyClasses}>
+                        <div className='mx_LeftPanel_wrapper'>
+                            { SettingsStore.getValue('TagPanel.enableTagPanel') &&
+                                (<div className="mx_GroupFilterPanelContainer">
+                                    <BackdropPanel
+                                        blurMultiplier={0.5}
+                                        backgroundImage={this.state.backgroundImage}
+                                    />
+                                    <GroupFilterPanel />
+                                    { SettingsStore.getValue("feature_custom_tags") ? <CustomRoomTagPanel /> : null }
+                                </div>)
+                            }
+                            { SpaceStore.spacesEnabled ? <>
+                                <BackdropPanel
+                                    blurMultiplier={0.5}
+                                    backgroundImage={this.state.backgroundImage}
+                                />
+                                <SpacePanel />
+                            </> : null }
+                            <BackdropPanel
+                                backgroundImage={this.state.backgroundImage}
+                            />
+                            <div
+                                className="mx_LeftPanel_wrapper--user"
+                                ref={this._resizeContainer}
+                                data-collapsed={this.props.collapseLhs ? true : undefined}
+                            >
+                                <LeftPanel
+                                    isMinimized={this.props.collapseLhs || false}
+                                    resizeNotifier={this.props.resizeNotifier}
+                                />
+                            </div>
+                        </div>
+                        <ResizeHandle passRef={this.resizeHandler} id="lp-resizer" />
+                        <div className="mx_RoomView_wrapper">
+                            { pageElement }
+                        </div>
                     </div>
                 </div>
                 <CallContainer />

src/components/structures/MatrixChat.tsx

@@ -107,6 +107,8 @@ import UIStore, { UI_EVENTS } from "../../stores/UIStore";
 import SoftLogout from './auth/SoftLogout';
 import { makeRoomPermalink } from "../../utils/permalinks/Permalinks";
 import { copyPlaintext } from "../../utils/strings";
+import { PosthogAnalytics } from '../../PosthogAnalytics';
+import { initSentry } from "../../sentry";
 
 /** constants for MatrixChat.state.view */
 export enum Views {
@@ -387,7 +389,13 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
         if (SettingsStore.getValue("analyticsOptIn")) {
             Analytics.enable();
         }
+
+        PosthogAnalytics.instance.updateAnonymityFromSettings();
+        PosthogAnalytics.instance.updatePlatformSuperProperties();
+
         CountlyAnalytics.instance.enable(/* anonymous = */ true);
+
+        initSentry(SdkConfig.get()["sentry"]);
     }
 
     private async postLoginSetup() {
@@ -443,6 +451,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
             const durationMs = this.stopPageChangeTimer();
             Analytics.trackPageChange(durationMs);
             CountlyAnalytics.instance.trackPageChange(durationMs);
+            PosthogAnalytics.instance.trackPageView(durationMs);
         }
         if (this.focusComposer) {
             dis.fire(Action.FocusSendMessageComposer);
@@ -1007,6 +1016,7 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
         this.setStateForNewView({
             view: Views.LOGGED_IN,
             justRegistered,
+            currentRoomId: null,
         });
         this.setPage(PageTypes.HomePage);
         this.notifyNewScreen('home');

src/components/structures/MessagePanel.tsx

@@ -51,7 +51,12 @@ import EditorStateTransfer from "../../utils/EditorStateTransfer";
 
 const CONTINUATION_MAX_INTERVAL = 5 * 60 * 1000; // 5 minutes
 const continuedTypes = [EventType.Sticker, EventType.RoomMessage];
-const membershipTypes = [EventType.RoomMember, EventType.RoomThirdPartyInvite, EventType.RoomServerAcl];
+const groupedEvents = [
+    EventType.RoomMember,
+    EventType.RoomThirdPartyInvite,
+    EventType.RoomServerAcl,
+    EventType.RoomPinnedEvents,
+];
 
 // check if there is a previous event and it has the same sender as this event
 // and the types are the same/is in continuedTypes and the time between them is <= CONTINUATION_MAX_INTERVAL
@@ -168,6 +173,8 @@ interface IProps {
     onUnfillRequest?(backwards: boolean, scrollToken: string): void;
 
     getRelationsForEvent?(eventId: string, relationType: string, eventType: string): Relations;
+
+    hideThreadedMessages?: boolean;
 }
 
 interface IState {
@@ -260,6 +267,9 @@ export default class MessagePanel extends React.Component<IProps, IState> {
     componentDidMount() {
         this.calculateRoomMembersCount();
         this.props.room?.on("RoomState.members", this.calculateRoomMembersCount);
+        if (SettingsStore.getValue("feature_thread")) {
+            this.props.room?.getThreads().forEach(thread => thread.fetchReplyChain());
+        }
         this.isMounted = true;
     }
 
@@ -438,6 +448,12 @@ export default class MessagePanel extends React.Component<IProps, IState> {
         // Always show highlighted event
         if (this.props.highlightedEventId === mxEv.getId()) return true;
 
+        if (mxEv.replyInThread
+                && this.props.hideThreadedMessages
+                && SettingsStore.getValue("feature_thread")) {
+            return false;
+        }
+
         return !shouldHideEvent(mxEv, this.context);
     }
 
@@ -618,7 +634,15 @@ export default class MessagePanel extends React.Component<IProps, IState> {
 
             for (const Grouper of groupers) {
                 if (Grouper.canStartGroup(this, mxEv)) {
-                    grouper = new Grouper(this, mxEv, prevEvent, lastShownEvent, nextEvent, nextTile);
+                    grouper = new Grouper(
+                        this,
+                        mxEv,
+                        prevEvent,
+                        lastShownEvent,
+                        this.props.layout,
+                        nextEvent,
+                        nextTile,
+                    );
                 }
             }
             if (!grouper) {
@@ -681,9 +705,9 @@ export default class MessagePanel extends React.Component<IProps, IState> {
 
         let willWantDateSeparator = false;
         let lastInSection = true;
-        if (nextEvent) {
-            willWantDateSeparator = this.wantsDateSeparator(mxEv, nextEvent.getDate() || new Date());
-            lastInSection = willWantDateSeparator || mxEv.getSender() !== nextEvent.getSender();
+        if (nextEventWithTile) {
+            willWantDateSeparator = this.wantsDateSeparator(mxEv, nextEventWithTile.getDate() || new Date());
+            lastInSection = willWantDateSeparator || mxEv.getSender() !== nextEventWithTile.getSender();
         }
 
         // is this a continuation of the previous message?
@@ -981,6 +1005,7 @@ abstract class BaseGrouper {
         public readonly event: MatrixEvent,
         public readonly prevEvent: MatrixEvent,
         public readonly lastShownEvent: MatrixEvent,
+        protected readonly layout: Layout,
         public readonly nextEvent?: MatrixEvent,
         public readonly nextEventTile?: MatrixEvent,
     ) {
@@ -1107,6 +1132,7 @@ class CreationGrouper extends BaseGrouper {
                 onToggle={panel.onHeightChanged} // Update scroll state
                 summaryMembers={[ev.sender]}
                 summaryText={summaryText}
+                layout={this.layout}
             >
                 { eventTiles }
             </EventListSummary>,
@@ -1134,10 +1160,11 @@ class RedactionGrouper extends BaseGrouper {
         ev: MatrixEvent,
         prevEvent: MatrixEvent,
         lastShownEvent: MatrixEvent,
+        layout: Layout,
         nextEvent: MatrixEvent,
         nextEventTile: MatrixEvent,
     ) {
-        super(panel, ev, prevEvent, lastShownEvent, nextEvent, nextEventTile);
+        super(panel, ev, prevEvent, lastShownEvent, layout, nextEvent, nextEventTile);
         this.events = [ev];
     }
 
@@ -1202,6 +1229,7 @@ class RedactionGrouper extends BaseGrouper {
                 onToggle={panel.onHeightChanged} // Update scroll state
                 summaryMembers={Array.from(senders)}
                 summaryText={_t("%(count)s messages deleted.", { count: eventTiles.length })}
+                layout={this.layout}
             >
                 { eventTiles }
             </EventListSummary>,
@@ -1222,7 +1250,7 @@ class RedactionGrouper extends BaseGrouper {
 // Wrap consecutive member events in a ListSummary, ignore if redacted
 class MemberGrouper extends BaseGrouper {
     static canStartGroup = function(panel: MessagePanel, ev: MatrixEvent): boolean {
-        return panel.shouldShowEvent(ev) && membershipTypes.includes(ev.getType() as EventType);
+        return panel.shouldShowEvent(ev) && groupedEvents.includes(ev.getType() as EventType);
     };
 
     constructor(
@@ -1230,8 +1258,9 @@ class MemberGrouper extends BaseGrouper {
         public readonly event: MatrixEvent,
         public readonly prevEvent: MatrixEvent,
         public readonly lastShownEvent: MatrixEvent,
+        protected readonly layout: Layout,
     ) {
-        super(panel, event, prevEvent, lastShownEvent);
+        super(panel, event, prevEvent, lastShownEvent, layout);
         this.events = [event];
     }
 
@@ -1239,7 +1268,7 @@ class MemberGrouper extends BaseGrouper {
         if (this.panel.wantsDateSeparator(this.events[0], ev.getDate())) {
             return false;
         }
-        return membershipTypes.includes(ev.getType() as EventType);
+        return groupedEvents.includes(ev.getType() as EventType);
     }
 
     public add(ev: MatrixEvent, showHiddenEvents?: boolean): void {
@@ -1306,6 +1335,7 @@ class MemberGrouper extends BaseGrouper {
                 events={this.events}
                 onToggle={panel.onHeightChanged} // Update scroll state
                 startExpanded={highlightInMels}
+                layout={this.layout}
             >
                 { eventTiles }
             </MemberEventListSummary>,

src/components/structures/MyGroups.js

@@ -109,8 +109,7 @@ export default class MyGroups extends React.Component {
             <SimpleRoomHeader title={_t("Communities")} icon={require("../../../res/img/icons-groups.svg")} />
             <div className='mx_MyGroups_header'>
                 <div className="mx_MyGroups_headerCard">
-                    <AccessibleButton className='mx_MyGroups_headerCard_button' onClick={this._onCreateGroupClick}>
-                    </AccessibleButton>
+                    <AccessibleButton className='mx_MyGroups_headerCard_button' onClick={this._onCreateGroupClick} />
                     <div className="mx_MyGroups_headerCard_content">
                         <div className="mx_MyGroups_headerCard_header">
                             { _t('Create a new community') }

src/components/structures/RightPanel.tsx

@@ -45,17 +45,23 @@ import GroupRoomInfo from "../views/groups/GroupRoomInfo";
 import UserInfo from "../views/right_panel/UserInfo";
 import ThirdPartyMemberInfo from "../views/rooms/ThirdPartyMemberInfo";
 import FilePanel from "./FilePanel";
+import ThreadView from "./ThreadView";
+import ThreadPanel from "./ThreadPanel";
 import NotificationPanel from "./NotificationPanel";
 import ResizeNotifier from "../../utils/ResizeNotifier";
 import PinnedMessagesCard from "../views/right_panel/PinnedMessagesCard";
 import { throttle } from 'lodash';
 import SpaceStore from "../../stores/SpaceStore";
+import { RoomPermalinkCreator } from '../../utils/permalinks/Permalinks';
+import { E2EStatus } from '../../utils/ShieldUtils';
 
 interface IProps {
     room?: Room; // if showing panels for a given room, this is set
     groupId?: string; // if showing panels for a given group, this is set
     user?: User; // used if we know the user ahead of opening the panel
     resizeNotifier: ResizeNotifier;
+    permalinkCreator?: RoomPermalinkCreator;
+    e2eStatus?: E2EStatus;
 }
 
 interface IState {
@@ -265,7 +271,7 @@ export default class RightPanel extends React.Component<IProps, IState> {
             case RightPanelPhases.EncryptionPanel:
                 panel = <UserInfo
                     user={this.state.member}
-                    room={this.state.phase === RightPanelPhases.SpaceMemberInfo ? this.state.space : this.props.room}
+                    room={this.context.getRoom(this.state.member.roomId) ?? this.props.room}
                     key={roomId || this.state.member.userId}
                     onClose={this.onClose}
                     phase={this.state.phase}
@@ -309,6 +315,23 @@ export default class RightPanel extends React.Component<IProps, IState> {
                 panel = <FilePanel roomId={roomId} resizeNotifier={this.props.resizeNotifier} onClose={this.onClose} />;
                 break;
 
+            case RightPanelPhases.ThreadView:
+                panel = <ThreadView
+                    room={this.props.room}
+                    resizeNotifier={this.props.resizeNotifier}
+                    onClose={this.onClose}
+                    mxEvent={this.state.event}
+                    permalinkCreator={this.props.permalinkCreator}
+                    e2eStatus={this.props.e2eStatus} />;
+                break;
+
+            case RightPanelPhases.ThreadPanel:
+                panel = <ThreadPanel
+                    roomId={roomId}
+                    resizeNotifier={this.props.resizeNotifier}
+                    onClose={this.onClose} />;
+                break;
+
             case RightPanelPhases.RoomSummary:
                 panel = <RoomSummaryCard room={this.props.room} onClose={this.onClose} />;
                 break;

src/components/structures/RoomDirectory.tsx

@@ -347,7 +347,7 @@ export default class RoomDirectory extends React.Component<IProps, IState> {
         });
     }
 
-    private onRoomClicked = (room: IPublicRoomsChunkRoom, ev: ButtonEvent) => {
+    private onRoomClicked = (room: IPublicRoomsChunkRoom, ev: React.MouseEvent) => {
         // If room was shift-clicked, remove it from the room directory
         if (ev.shiftKey && !this.state.selectedCommunityId) {
             ev.preventDefault();
@@ -833,6 +833,6 @@ export default class RoomDirectory extends React.Component<IProps, IState> {
 
 // Similar to matrix-react-sdk's MatrixTools.getDisplayAliasForRoom
 // but works with the objects we get from the public room list
-function getDisplayAliasForRoom(room: IPublicRoomsChunkRoom) {
+export function getDisplayAliasForRoom(room: IPublicRoomsChunkRoom) {
     return getDisplayAliasForAliasSet(room.canonical_alias, room.aliases);
 }

src/components/structures/RoomStatusBar.js

@@ -266,8 +266,12 @@ export default class RoomStatusBar extends React.PureComponent {
                 <div className="mx_RoomStatusBar">
                     <div role="alert">
                         <div className="mx_RoomStatusBar_connectionLostBar">
-                            <img src={require("../../../res/img/feather-customised/warning-triangle.svg")} width="24"
-                                height="24" title="/!\ " alt="/!\ " />
+                            <img
+                                src={require("../../../res/img/feather-customised/warning-triangle.svg")}
+                                width="24"
+                                height="24"
+                                title="/!\ "
+                                alt="/!\ " />
                             <div>
                                 <div className="mx_RoomStatusBar_connectionLostBar_title">
                                     { _t('Connectivity to the server has been lost.') }

src/components/structures/RoomView.tsx

@@ -1740,7 +1740,8 @@ export default class RoomView extends React.Component<IProps, IState> {
                                 onJoinClick={this.onJoinButtonClicked}
                                 onForgetClick={this.onForgetClick}
                                 onRejectClick={this.onRejectThreepidInviteButtonClicked}
-                                canPreview={false} error={this.state.roomLoadError}
+                                canPreview={false}
+                                error={this.state.roomLoadError}
                                 roomAlias={roomAlias}
                                 joining={this.state.joining}
                                 inviterName={inviterName}
@@ -1847,6 +1848,19 @@ export default class RoomView extends React.Component<IProps, IState> {
             />;
         }
 
+        const statusBarAreaClass = classNames("mx_RoomView_statusArea", {
+            "mx_RoomView_statusArea_expanded": isStatusAreaExpanded,
+        });
+
+        // if statusBar does not exist then statusBarArea is blank and takes up unnecessary space on the screen
+        // show statusBarArea only if statusBar is present
+        const statusBarArea = statusBar && <div className={statusBarAreaClass}>
+            <div className="mx_RoomView_statusAreaBox">
+                <div className="mx_RoomView_statusAreaBox_line" />
+                { statusBar }
+            </div>
+        </div>;
+
         const roomVersionRecommendation = this.state.upgradeRecommendation;
         const showRoomUpgradeBar = (
             roomVersionRecommendation &&
@@ -1866,7 +1880,7 @@ export default class RoomView extends React.Component<IProps, IState> {
                 isRoomEncrypted={this.context.isRoomEncrypted(this.state.room.roomId)}
             />;
         } else if (showRoomUpgradeBar) {
-            aux = <RoomUpgradeWarningBar room={this.state.room} recommendation={roomVersionRecommendation} />;
+            aux = <RoomUpgradeWarningBar room={this.state.room} />;
         } else if (myMembership !== "join") {
             // We do have a room object for this room, but we're not currently in it.
             // We may have a 3rd party invite to it.
@@ -2041,17 +2055,16 @@ export default class RoomView extends React.Component<IProps, IState> {
                 highlight={this.state.room.getUnreadNotificationCount(NotificationCountType.Highlight) > 0}
                 numUnreadMessages={this.state.numUnreadMessages}
                 onScrollToBottomClick={this.jumpToLiveTimeline}
-                roomId={this.state.roomId}
             />);
         }
 
-        const statusBarAreaClass = classNames("mx_RoomView_statusArea", {
-            "mx_RoomView_statusArea_expanded": isStatusAreaExpanded,
-        });
-
         const showRightPanel = this.state.room && this.state.showRightPanel;
         const rightPanel = showRightPanel
-            ? <RightPanel room={this.state.room} resizeNotifier={this.props.resizeNotifier} />
+            ? <RightPanel
+                room={this.state.room}
+                resizeNotifier={this.props.resizeNotifier}
+                permalinkCreator={this.getPermalinkCreatorForRoom(this.state.room)}
+                e2eStatus={this.state.e2eStatus} />
             : null;
 
         const timelineClasses = classNames("mx_RoomView_timeline", {
@@ -2094,12 +2107,7 @@ export default class RoomView extends React.Component<IProps, IState> {
                                     { messagePanel }
                                     { searchResultsPanel }
                                 </div>
-                                <div className={statusBarAreaClass}>
-                                    <div className="mx_RoomView_statusAreaBox">
-                                        <div className="mx_RoomView_statusAreaBox_line" />
-                                        { statusBar }
-                                    </div>
-                                </div>
+                                { statusBarArea }
                                 { previewBar }
                                 { messageComposer }
                             </div>

src/components/structures/ScrollPanel.tsx

@@ -183,8 +183,14 @@ export default class ScrollPanel extends React.Component<IProps> {
     private readonly itemlist = createRef<HTMLOListElement>();
     private unmounted = false;
     private scrollTimeout: Timer;
+    // Are we currently trying to backfill?
     private isFilling: boolean;
+    // Is the current fill request caused by a props update?
+    private isFillingDueToPropsUpdate = false;
+    // Did another request to check the fill state arrive while we were trying to backfill?
     private fillRequestWhileRunning: boolean;
+    // Is that next fill request scheduled because of a props update?
+    private pendingFillDueToPropsUpdate: boolean;
     private scrollState: IScrollState;
     private preventShrinkingState: IPreventShrinkingState;
     private unfillDebouncer: number;
@@ -213,7 +219,7 @@ export default class ScrollPanel extends React.Component<IProps> {
         // adding events to the top).
         //
         // This will also re-check the fill state, in case the paginate was inadequate
-        this.checkScroll();
+        this.checkScroll(true);
         this.updatePreventShrinking();
     }
 
@@ -251,12 +257,12 @@ export default class ScrollPanel extends React.Component<IProps> {
 
     // after an update to the contents of the panel, check that the scroll is
     // where it ought to be, and set off pagination requests if necessary.
-    public checkScroll = () => {
+    public checkScroll = (isFromPropsUpdate = false) => {
         if (this.unmounted) {
             return;
         }
         this.restoreSavedScrollState();
-        this.checkFillState();
+        this.checkFillState(0, isFromPropsUpdate);
     };
 
     // return true if the content is fully scrolled down right now; else false.
@@ -319,7 +325,7 @@ export default class ScrollPanel extends React.Component<IProps> {
     }
 
     // check the scroll state and send out backfill requests if necessary.
-    public checkFillState = async (depth = 0): Promise<void> => {
+    public checkFillState = async (depth = 0, isFromPropsUpdate = false): Promise<void> => {
         if (this.unmounted) {
             return;
         }
@@ -355,14 +361,20 @@ export default class ScrollPanel extends React.Component<IProps> {
         // don't allow more than 1 chain of calls concurrently
         // do make a note when a new request comes in while already running one,
         // so we can trigger a new chain of calls once done.
+        // However, we make an exception for when we're already filling due to a
+        // props (or children) update, because very often the children include
+        // spinners to say whether we're paginating or not, so this would cause
+        // infinite paginating.
         if (isFirstCall) {
-            if (this.isFilling) {
+            if (this.isFilling && !this.isFillingDueToPropsUpdate) {
                 debuglog("isFilling: not entering while request is ongoing, marking for a subsequent request");
                 this.fillRequestWhileRunning = true;
+                this.pendingFillDueToPropsUpdate = isFromPropsUpdate;
                 return;
             }
             debuglog("isFilling: setting");
             this.isFilling = true;
+            this.isFillingDueToPropsUpdate = isFromPropsUpdate;
         }
 
         const itemlist = this.itemlist.current;
@@ -393,11 +405,14 @@ export default class ScrollPanel extends React.Component<IProps> {
         if (isFirstCall) {
             debuglog("isFilling: clearing");
             this.isFilling = false;
+            this.isFillingDueToPropsUpdate = false;
         }
 
         if (this.fillRequestWhileRunning) {
+            const refillDueToPropsUpdate = this.pendingFillDueToPropsUpdate;
             this.fillRequestWhileRunning = false;
-            this.checkFillState();
+            this.pendingFillDueToPropsUpdate = false;
+            this.checkFillState(0, refillDueToPropsUpdate);
         }
     };
 

src/components/structures/SearchBox.js

@@ -136,8 +136,8 @@ export default class SearchBox extends React.Component {
                 key="button"
                 tabIndex={-1}
                 className="mx_SearchBox_closeButton"
-                onClick={() => {this._clearSearch("button"); }}>
-            </AccessibleButton>) : undefined;
+                onClick={() => {this._clearSearch("button"); }}
+            />) : undefined;
 
         // show a shorter placeholder when blurred, if requested
         // this is used for the room filter field that has

src/components/structures/SpaceHierarchy.tsx

@@ -0,0 +1,717 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {
+    ReactNode,
+    useCallback,
+    useEffect,
+    useMemo,
+    useRef,
+    useState,
+    KeyboardEvent,
+    KeyboardEventHandler,
+    useContext,
+    SetStateAction,
+    Dispatch,
+} from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+import { RoomHierarchy } from "matrix-js-sdk/src/room-hierarchy";
+import { EventType, RoomType } from "matrix-js-sdk/src/@types/event";
+import { IHierarchyRelation, IHierarchyRoom } from "matrix-js-sdk/src/@types/spaces";
+import { MatrixClient } from "matrix-js-sdk/src/matrix";
+import classNames from "classnames";
+import { sortBy } from "lodash";
+
+import dis from "../../dispatcher/dispatcher";
+import defaultDispatcher from "../../dispatcher/dispatcher";
+import { _t } from "../../languageHandler";
+import AccessibleButton, { ButtonEvent } from "../views/elements/AccessibleButton";
+import Spinner from "../views/elements/Spinner";
+import SearchBox from "./SearchBox";
+import RoomAvatar from "../views/avatars/RoomAvatar";
+import StyledCheckbox from "../views/elements/StyledCheckbox";
+import BaseAvatar from "../views/avatars/BaseAvatar";
+import { mediaFromMxc } from "../../customisations/Media";
+import InfoTooltip from "../views/elements/InfoTooltip";
+import TextWithTooltip from "../views/elements/TextWithTooltip";
+import { useStateToggle } from "../../hooks/useStateToggle";
+import { getChildOrder } from "../../stores/SpaceStore";
+import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
+import { linkifyElement } from "../../HtmlUtils";
+import { useDispatcher } from "../../hooks/useDispatcher";
+import { Action } from "../../dispatcher/actions";
+import { Key } from "../../Keyboard";
+import { IState, RovingTabIndexProvider, useRovingTabIndex } from "../../accessibility/RovingTabIndex";
+import { getDisplayAliasForRoom } from "./RoomDirectory";
+import MatrixClientContext from "../../contexts/MatrixClientContext";
+
+interface IProps {
+    space: Room;
+    initialText?: string;
+    additionalButtons?: ReactNode;
+    showRoom(cli: MatrixClient, hierarchy: RoomHierarchy, roomId: string, autoJoin?: boolean): void;
+}
+
+interface ITileProps {
+    room: IHierarchyRoom;
+    suggested?: boolean;
+    selected?: boolean;
+    numChildRooms?: number;
+    hasPermissions?: boolean;
+    onViewRoomClick(autoJoin: boolean): void;
+    onToggleClick?(): void;
+}
+
+const Tile: React.FC<ITileProps> = ({
+    room,
+    suggested,
+    selected,
+    hasPermissions,
+    onToggleClick,
+    onViewRoomClick,
+    numChildRooms,
+    children,
+}) => {
+    const cli = useContext(MatrixClientContext);
+    const joinedRoom = cli.getRoom(room.room_id)?.getMyMembership() === "join" ? cli.getRoom(room.room_id) : null;
+    const name = joinedRoom?.name || room.name || room.canonical_alias || room.aliases?.[0]
+        || (room.room_type === RoomType.Space ? _t("Unnamed Space") : _t("Unnamed Room"));
+
+    const [showChildren, toggleShowChildren] = useStateToggle(true);
+    const [onFocus, isActive, ref] = useRovingTabIndex();
+
+    const onPreviewClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+        onViewRoomClick(false);
+    };
+    const onJoinClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+        onViewRoomClick(true);
+    };
+
+    let button;
+    if (joinedRoom) {
+        button = <AccessibleButton
+            onClick={onPreviewClick}
+            kind="primary_outline"
+            onFocus={onFocus}
+            tabIndex={isActive ? 0 : -1}
+        >
+            { _t("View") }
+        </AccessibleButton>;
+    } else if (onJoinClick) {
+        button = <AccessibleButton
+            onClick={onJoinClick}
+            kind="primary"
+            onFocus={onFocus}
+            tabIndex={isActive ? 0 : -1}
+        >
+            { _t("Join") }
+        </AccessibleButton>;
+    }
+
+    let checkbox;
+    if (onToggleClick) {
+        if (hasPermissions) {
+            checkbox = <StyledCheckbox checked={!!selected} onChange={onToggleClick} tabIndex={isActive ? 0 : -1} />;
+        } else {
+            checkbox = <TextWithTooltip
+                tooltip={_t("You don't have permission")}
+                onClick={ev => { ev.stopPropagation(); }}
+            >
+                <StyledCheckbox disabled={true} tabIndex={isActive ? 0 : -1} />
+            </TextWithTooltip>;
+        }
+    }
+
+    let avatar;
+    if (joinedRoom) {
+        avatar = <RoomAvatar room={joinedRoom} width={20} height={20} />;
+    } else {
+        avatar = <BaseAvatar
+            name={name}
+            idName={room.room_id}
+            url={room.avatar_url ? mediaFromMxc(room.avatar_url).getSquareThumbnailHttp(20) : null}
+            width={20}
+            height={20}
+        />;
+    }
+
+    let description = _t("%(count)s members", { count: room.num_joined_members });
+    if (numChildRooms !== undefined) {
+        description += " · " + _t("%(count)s rooms", { count: numChildRooms });
+    }
+
+    const topic = joinedRoom?.currentState?.getStateEvents(EventType.RoomTopic, "")?.getContent()?.topic || room.topic;
+    if (topic) {
+        description += " · " + topic;
+    }
+
+    let suggestedSection;
+    if (suggested) {
+        suggestedSection = <InfoTooltip tooltip={_t("This room is suggested as a good one to join")}>
+            { _t("Suggested") }
+        </InfoTooltip>;
+    }
+
+    const content = <React.Fragment>
+        { avatar }
+        <div className="mx_SpaceHierarchy_roomTile_name">
+            { name }
+            { suggestedSection }
+        </div>
+
+        <div
+            className="mx_SpaceHierarchy_roomTile_info"
+            ref={e => e && linkifyElement(e)}
+            onClick={ev => {
+                // prevent clicks on links from bubbling up to the room tile
+                if ((ev.target as HTMLElement).tagName === "A") {
+                    ev.stopPropagation();
+                }
+            }}
+        >
+            { description }
+        </div>
+        <div className="mx_SpaceHierarchy_actions">
+            { button }
+            { checkbox }
+        </div>
+    </React.Fragment>;
+
+    let childToggle: JSX.Element;
+    let childSection: JSX.Element;
+    let onKeyDown: KeyboardEventHandler;
+    if (children) {
+        // the chevron is purposefully a div rather than a button as it should be ignored for a11y
+        childToggle = <div
+            className={classNames("mx_SpaceHierarchy_subspace_toggle", {
+                mx_SpaceHierarchy_subspace_toggle_shown: showChildren,
+            })}
+            onClick={ev => {
+                ev.stopPropagation();
+                toggleShowChildren();
+            }}
+        />;
+
+        if (showChildren) {
+            const onChildrenKeyDown = (e) => {
+                if (e.key === Key.ARROW_LEFT) {
+                    e.preventDefault();
+                    e.stopPropagation();
+                    ref.current?.focus();
+                }
+            };
+
+            childSection = <div
+                className="mx_SpaceHierarchy_subspace_children"
+                onKeyDown={onChildrenKeyDown}
+                role="group"
+            >
+                { children }
+            </div>;
+        }
+
+        onKeyDown = (e) => {
+            let handled = false;
+
+            switch (e.key) {
+                case Key.ARROW_LEFT:
+                    if (showChildren) {
+                        handled = true;
+                        toggleShowChildren();
+                    }
+                    break;
+
+                case Key.ARROW_RIGHT:
+                    handled = true;
+                    if (showChildren) {
+                        const childSection = ref.current?.nextElementSibling;
+                        childSection?.querySelector<HTMLDivElement>(".mx_SpaceHierarchy_roomTile")?.focus();
+                    } else {
+                        toggleShowChildren();
+                    }
+                    break;
+            }
+
+            if (handled) {
+                e.preventDefault();
+                e.stopPropagation();
+            }
+        };
+    }
+
+    return <li
+        className="mx_SpaceHierarchy_roomTileWrapper"
+        role="treeitem"
+        aria-expanded={children ? showChildren : undefined}
+    >
+        <AccessibleButton
+            className={classNames("mx_SpaceHierarchy_roomTile", {
+                mx_SpaceHierarchy_subspace: room.room_type === RoomType.Space,
+            })}
+            onClick={(hasPermissions && onToggleClick) ? onToggleClick : onPreviewClick}
+            onKeyDown={onKeyDown}
+            inputRef={ref}
+            onFocus={onFocus}
+            tabIndex={isActive ? 0 : -1}
+        >
+            { content }
+            { childToggle }
+        </AccessibleButton>
+        { childSection }
+    </li>;
+};
+
+export const showRoom = (cli: MatrixClient, hierarchy: RoomHierarchy, roomId: string, autoJoin = false) => {
+    const room = hierarchy.roomMap.get(roomId);
+
+    // Don't let the user view a room they won't be able to either peek or join:
+    // fail earlier so they don't have to click back to the directory.
+    if (cli.isGuest()) {
+        if (!room.world_readable && !room.guest_can_join) {
+            dis.dispatch({ action: "require_registration" });
+            return;
+        }
+    }
+
+    const roomAlias = getDisplayAliasForRoom(room) || undefined;
+    dis.dispatch({
+        action: "view_room",
+        auto_join: autoJoin,
+        should_peek: true,
+        _type: "room_directory", // instrumentation
+        room_alias: roomAlias,
+        room_id: room.room_id,
+        via_servers: Array.from(hierarchy.viaMap.get(roomId) || []),
+        oob_data: {
+            avatarUrl: room.avatar_url,
+            // XXX: This logic is duplicated from the JS SDK which would normally decide what the name is.
+            name: room.name || roomAlias || _t("Unnamed room"),
+        },
+    });
+};
+
+interface IHierarchyLevelProps {
+    root: IHierarchyRoom;
+    roomSet: Set<IHierarchyRoom>;
+    hierarchy: RoomHierarchy;
+    parents: Set<string>;
+    selectedMap?: Map<string, Set<string>>;
+    onViewRoomClick(roomId: string, autoJoin: boolean): void;
+    onToggleClick?(parentId: string, childId: string): void;
+}
+
+export const HierarchyLevel = ({
+    root,
+    roomSet,
+    hierarchy,
+    parents,
+    selectedMap,
+    onViewRoomClick,
+    onToggleClick,
+}: IHierarchyLevelProps) => {
+    const cli = useContext(MatrixClientContext);
+    const space = cli.getRoom(root.room_id);
+    const hasPermissions = space?.currentState.maySendStateEvent(EventType.SpaceChild, cli.getUserId());
+
+    const sortedChildren = sortBy(root.children_state, ev => {
+        return getChildOrder(ev.content.order, ev.origin_server_ts, ev.state_key);
+    });
+
+    const [subspaces, childRooms] = sortedChildren.reduce((result, ev: IHierarchyRelation) => {
+        const room = hierarchy.roomMap.get(ev.state_key);
+        if (room && roomSet.has(room)) {
+            result[room.room_type === RoomType.Space ? 0 : 1].push(room);
+        }
+        return result;
+    }, [[] as IHierarchyRoom[], [] as IHierarchyRoom[]]);
+
+    const newParents = new Set(parents).add(root.room_id);
+    return <React.Fragment>
+        {
+            childRooms.map(room => (
+                <Tile
+                    key={room.room_id}
+                    room={room}
+                    suggested={hierarchy.isSuggested(root.room_id, room.room_id)}
+                    selected={selectedMap?.get(root.room_id)?.has(room.room_id)}
+                    onViewRoomClick={(autoJoin) => {
+                        onViewRoomClick(room.room_id, autoJoin);
+                    }}
+                    hasPermissions={hasPermissions}
+                    onToggleClick={onToggleClick ? () => onToggleClick(root.room_id, room.room_id) : undefined}
+                />
+            ))
+        }
+
+        {
+            subspaces.filter(room => !newParents.has(room.room_id)).map(space => (
+                <Tile
+                    key={space.room_id}
+                    room={space}
+                    numChildRooms={space.children_state.filter(ev => {
+                        const room = hierarchy.roomMap.get(ev.state_key);
+                        return room && roomSet.has(room) && !room.room_type;
+                    }).length}
+                    suggested={hierarchy.isSuggested(root.room_id, space.room_id)}
+                    selected={selectedMap?.get(root.room_id)?.has(space.room_id)}
+                    onViewRoomClick={(autoJoin) => {
+                        onViewRoomClick(space.room_id, autoJoin);
+                    }}
+                    hasPermissions={hasPermissions}
+                    onToggleClick={onToggleClick ? () => onToggleClick(root.room_id, space.room_id) : undefined}
+                >
+                    <HierarchyLevel
+                        root={space}
+                        roomSet={roomSet}
+                        hierarchy={hierarchy}
+                        parents={newParents}
+                        selectedMap={selectedMap}
+                        onViewRoomClick={onViewRoomClick}
+                        onToggleClick={onToggleClick}
+                    />
+                </Tile>
+            ))
+        }
+    </React.Fragment>;
+};
+
+const INITIAL_PAGE_SIZE = 20;
+
+export const useSpaceSummary = (space: Room): {
+    loading: boolean;
+    rooms: IHierarchyRoom[];
+    hierarchy: RoomHierarchy;
+    loadMore(pageSize?: number): Promise <void>;
+} => {
+    const [rooms, setRooms] = useState<IHierarchyRoom[]>([]);
+    const [loading, setLoading] = useState(true);
+    const [hierarchy, setHierarchy] = useState<RoomHierarchy>();
+
+    const resetHierarchy = useCallback(() => {
+        const hierarchy = new RoomHierarchy(space, INITIAL_PAGE_SIZE);
+        setHierarchy(hierarchy);
+
+        let discard = false;
+        hierarchy.load().then(() => {
+            if (discard) return;
+            setRooms(hierarchy.rooms);
+            setLoading(false);
+        });
+
+        return () => {
+            discard = true;
+        };
+    }, [space]);
+    useEffect(resetHierarchy, [resetHierarchy]);
+
+    useDispatcher(defaultDispatcher, (payload => {
+        if (payload.action === Action.UpdateSpaceHierarchy) {
+            setLoading(true);
+            setRooms([]); // TODO
+            resetHierarchy();
+        }
+    }));
+
+    const loadMore = useCallback(async (pageSize?: number) => {
+        if (!hierarchy.canLoadMore || hierarchy.noSupport) return;
+
+        setLoading(true);
+        await hierarchy.load(pageSize);
+        setRooms(hierarchy.rooms);
+        setLoading(false);
+    }, [hierarchy]);
+
+    return { loading, rooms, hierarchy, loadMore };
+};
+
+const useIntersectionObserver = (callback: () => void) => {
+    const handleObserver = (entries: IntersectionObserverEntry[]) => {
+        const target = entries[0];
+        if (target.isIntersecting) {
+            callback();
+        }
+    };
+
+    const observerRef = useRef<IntersectionObserver>();
+    return (element: HTMLDivElement) => {
+        if (observerRef.current) {
+            observerRef.current.disconnect();
+        } else if (element) {
+            observerRef.current = new IntersectionObserver(handleObserver, {
+                root: element.parentElement,
+                rootMargin: "0px 0px 600px 0px",
+            });
+        }
+
+        if (observerRef.current && element) {
+            observerRef.current.observe(element);
+        }
+    };
+};
+
+interface IManageButtonsProps {
+    hierarchy: RoomHierarchy;
+    selected: Map<string, Set<string>>;
+    setSelected: Dispatch<SetStateAction<Map<string, Set<string>>>>;
+    setError: Dispatch<SetStateAction<string>>;
+}
+
+const ManageButtons = ({ hierarchy, selected, setSelected, setError }: IManageButtonsProps) => {
+    const cli = useContext(MatrixClientContext);
+
+    const [removing, setRemoving] = useState(false);
+    const [saving, setSaving] = useState(false);
+
+    const selectedRelations = Array.from(selected.keys()).flatMap(parentId => {
+        return [
+            ...selected.get(parentId).values(),
+        ].map(childId => [parentId, childId]) as [string, string][];
+    });
+
+    const selectionAllSuggested = selectedRelations.every(([parentId, childId]) => {
+        return hierarchy.isSuggested(parentId, childId);
+    });
+
+    const disabled = !selectedRelations.length || removing || saving;
+
+    let Button: React.ComponentType<React.ComponentProps<typeof AccessibleButton>> = AccessibleButton;
+    let props = {};
+    if (!selectedRelations.length) {
+        Button = AccessibleTooltipButton;
+        props = {
+            tooltip: _t("Select a room below first"),
+            yOffset: -40,
+        };
+    }
+
+    return <>
+        <Button
+            {...props}
+            onClick={async () => {
+                setRemoving(true);
+                try {
+                    for (const [parentId, childId] of selectedRelations) {
+                        await cli.sendStateEvent(parentId, EventType.SpaceChild, {}, childId);
+
+                        hierarchy.removeRelation(parentId, childId);
+                    }
+                } catch (e) {
+                    setError(_t("Failed to remove some rooms. Try again later"));
+                }
+                setRemoving(false);
+                setSelected(new Map());
+            }}
+            kind="danger_outline"
+            disabled={disabled}
+        >
+            { removing ? _t("Removing...") : _t("Remove") }
+        </Button>
+        <Button
+            {...props}
+            onClick={async () => {
+                setSaving(true);
+                try {
+                    for (const [parentId, childId] of selectedRelations) {
+                        const suggested = !selectionAllSuggested;
+                        const existingContent = hierarchy.getRelation(parentId, childId)?.content;
+                        if (!existingContent || existingContent.suggested === suggested) continue;
+
+                        const content = {
+                            ...existingContent,
+                            suggested: !selectionAllSuggested,
+                        };
+
+                        await cli.sendStateEvent(parentId, EventType.SpaceChild, content, childId);
+
+                        // mutate the local state to save us having to refetch the world
+                        existingContent.suggested = content.suggested;
+                    }
+                } catch (e) {
+                    setError("Failed to update some suggestions. Try again later");
+                }
+                setSaving(false);
+                setSelected(new Map());
+            }}
+            kind="primary_outline"
+            disabled={disabled}
+        >
+            { saving
+                ? _t("Saving...")
+                : (selectionAllSuggested ? _t("Mark as not suggested") : _t("Mark as suggested"))
+            }
+        </Button>
+    </>;
+};
+
+const SpaceHierarchy = ({
+    space,
+    initialText = "",
+    showRoom,
+    additionalButtons,
+}: IProps) => {
+    const cli = useContext(MatrixClientContext);
+    const [query, setQuery] = useState(initialText);
+
+    const [selected, setSelected] = useState(new Map<string, Set<string>>()); // Map<parentId, Set<childId>>
+
+    const { loading, rooms, hierarchy, loadMore } = useSpaceSummary(space);
+
+    const filteredRoomSet = useMemo<Set<IHierarchyRoom>>(() => {
+        if (!rooms.length) return new Set();
+        const lcQuery = query.toLowerCase().trim();
+        if (!lcQuery) return new Set(rooms);
+
+        const directMatches = rooms.filter(r => {
+            return r.name?.toLowerCase().includes(lcQuery) || r.topic?.toLowerCase().includes(lcQuery);
+        });
+
+        // Walk back up the tree to find all parents of the direct matches to show their place in the hierarchy
+        const visited = new Set<string>();
+        const queue = [...directMatches.map(r => r.room_id)];
+        while (queue.length) {
+            const roomId = queue.pop();
+            visited.add(roomId);
+            hierarchy.backRefs.get(roomId)?.forEach(parentId => {
+                if (!visited.has(parentId)) {
+                    queue.push(parentId);
+                }
+            });
+        }
+
+        return new Set(rooms.filter(r => visited.has(r.room_id)));
+    }, [rooms, hierarchy, query]);
+
+    const [error, setError] = useState("");
+
+    const loaderRef = useIntersectionObserver(loadMore);
+
+    if (!loading && hierarchy.noSupport) {
+        return <p>{ _t("Your server does not support showing space hierarchies.") }</p>;
+    }
+
+    const onKeyDown = (ev: KeyboardEvent, state: IState): void => {
+        if (ev.key === Key.ARROW_DOWN && ev.currentTarget.classList.contains("mx_SpaceHierarchy_search")) {
+            state.refs[0]?.current?.focus();
+        }
+    };
+
+    const onToggleClick = (parentId: string, childId: string): void => {
+        setError("");
+        if (!selected.has(parentId)) {
+            setSelected(new Map(selected.set(parentId, new Set([childId]))));
+            return;
+        }
+
+        const parentSet = selected.get(parentId);
+        if (!parentSet.has(childId)) {
+            setSelected(new Map(selected.set(parentId, new Set([...parentSet, childId]))));
+            return;
+        }
+
+        parentSet.delete(childId);
+        setSelected(new Map(selected.set(parentId, new Set(parentSet))));
+    };
+
+    return <RovingTabIndexProvider onKeyDown={onKeyDown} handleHomeEnd handleUpDown>
+        { ({ onKeyDownHandler }) => {
+            let content: JSX.Element;
+            let loader: JSX.Element;
+
+            if (loading && !rooms.length) {
+                content = <Spinner />;
+            } else {
+                const hasPermissions = space?.getMyMembership() === "join" &&
+                    space.currentState.maySendStateEvent(EventType.SpaceChild, cli.getUserId());
+
+                let results: JSX.Element;
+                if (filteredRoomSet.size) {
+                    results = <>
+                        <HierarchyLevel
+                            root={hierarchy.roomMap.get(space.roomId)}
+                            roomSet={filteredRoomSet}
+                            hierarchy={hierarchy}
+                            parents={new Set()}
+                            selectedMap={selected}
+                            onToggleClick={hasPermissions ? onToggleClick : undefined}
+                            onViewRoomClick={(roomId, autoJoin) => {
+                                showRoom(cli, hierarchy, roomId, autoJoin);
+                            }}
+                        />
+                    </>;
+
+                    if (hierarchy.canLoadMore) {
+                        loader = <div ref={loaderRef}>
+                            <Spinner />
+                        </div>;
+                    }
+                } else {
+                    results = <div className="mx_SpaceHierarchy_noResults">
+                        <h3>{ _t("No results found") }</h3>
+                        <div>{ _t("You may want to try a different search or check for typos.") }</div>
+                    </div>;
+                }
+
+                content = <>
+                    <div className="mx_SpaceHierarchy_listHeader">
+                        <h4>{ query.trim() ? _t("Results") : _t("Rooms and spaces") }</h4>
+                        <span>
+                            { additionalButtons }
+                            { hasPermissions && (
+                                <ManageButtons
+                                    hierarchy={hierarchy}
+                                    selected={selected}
+                                    setSelected={setSelected}
+                                    setError={setError}
+                                />
+                            ) }
+                        </span>
+                    </div>
+                    { error && <div className="mx_SpaceHierarchy_error">
+                        { error }
+                    </div> }
+                    <ul
+                        className="mx_SpaceHierarchy_list"
+                        onKeyDown={onKeyDownHandler}
+                        role="tree"
+                        aria-label={_t("Space")}
+                    >
+                        { results }
+                    </ul>
+                    { loader }
+                </>;
+            }
+
+            return <>
+                <SearchBox
+                    className="mx_SpaceHierarchy_search mx_textinput_icon mx_textinput_search"
+                    placeholder={_t("Search names and descriptions")}
+                    onSearch={setQuery}
+                    autoFocus={true}
+                    initialValue={initialText}
+                    onKeyDown={onKeyDownHandler}
+                />
+
+                { content }
+            </>;
+        } }
+    </RovingTabIndexProvider>;
+};
+
+export default SpaceHierarchy;

src/components/structures/SpaceRoomDirectory.tsx

@@ -1,642 +0,0 @@
-/*
-Copyright 2021 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React, { ReactNode, useMemo, useState } from "react";
-import { Room } from "matrix-js-sdk/src/models/room";
-import { MatrixClient } from "matrix-js-sdk/src/client";
-import { EventType, RoomType } from "matrix-js-sdk/src/@types/event";
-import { ISpaceSummaryRoom, ISpaceSummaryEvent } from "matrix-js-sdk/src/@types/spaces";
-import classNames from "classnames";
-import { sortBy } from "lodash";
-
-import { MatrixClientPeg } from "../../MatrixClientPeg";
-import dis from "../../dispatcher/dispatcher";
-import { _t } from "../../languageHandler";
-import AccessibleButton, { ButtonEvent } from "../views/elements/AccessibleButton";
-import BaseDialog from "../views/dialogs/BaseDialog";
-import Spinner from "../views/elements/Spinner";
-import SearchBox from "./SearchBox";
-import RoomAvatar from "../views/avatars/RoomAvatar";
-import RoomName from "../views/elements/RoomName";
-import { useAsyncMemo } from "../../hooks/useAsyncMemo";
-import { EnhancedMap } from "../../utils/maps";
-import StyledCheckbox from "../views/elements/StyledCheckbox";
-import AutoHideScrollbar from "./AutoHideScrollbar";
-import BaseAvatar from "../views/avatars/BaseAvatar";
-import { mediaFromMxc } from "../../customisations/Media";
-import InfoTooltip from "../views/elements/InfoTooltip";
-import TextWithTooltip from "../views/elements/TextWithTooltip";
-import { useStateToggle } from "../../hooks/useStateToggle";
-import { getChildOrder } from "../../stores/SpaceStore";
-import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
-import { linkifyElement } from "../../HtmlUtils";
-import { getDisplayAliasForAliasSet } from "../../Rooms";
-
-interface IHierarchyProps {
-    space: Room;
-    initialText?: string;
-    refreshToken?: any;
-    additionalButtons?: ReactNode;
-    showRoom(room: ISpaceSummaryRoom, viaServers?: string[], autoJoin?: boolean): void;
-}
-
-interface ITileProps {
-    room: ISpaceSummaryRoom;
-    suggested?: boolean;
-    selected?: boolean;
-    numChildRooms?: number;
-    hasPermissions?: boolean;
-    onViewRoomClick(autoJoin: boolean): void;
-    onToggleClick?(): void;
-}
-
-const Tile: React.FC<ITileProps> = ({
-    room,
-    suggested,
-    selected,
-    hasPermissions,
-    onToggleClick,
-    onViewRoomClick,
-    numChildRooms,
-    children,
-}) => {
-    const cli = MatrixClientPeg.get();
-    const joinedRoom = cli.getRoom(room.room_id)?.getMyMembership() === "join" ? cli.getRoom(room.room_id) : null;
-    const name = joinedRoom?.name || room.name || room.canonical_alias || room.aliases?.[0]
-        || (room.room_type === RoomType.Space ? _t("Unnamed Space") : _t("Unnamed Room"));
-
-    const [showChildren, toggleShowChildren] = useStateToggle(true);
-
-    const onPreviewClick = (ev: ButtonEvent) => {
-        ev.preventDefault();
-        ev.stopPropagation();
-        onViewRoomClick(false);
-    };
-    const onJoinClick = (ev: ButtonEvent) => {
-        ev.preventDefault();
-        ev.stopPropagation();
-        onViewRoomClick(true);
-    };
-
-    let button;
-    if (joinedRoom) {
-        button = <AccessibleButton onClick={onPreviewClick} kind="primary_outline">
-            { _t("View") }
-        </AccessibleButton>;
-    } else if (onJoinClick) {
-        button = <AccessibleButton onClick={onJoinClick} kind="primary">
-            { _t("Join") }
-        </AccessibleButton>;
-    }
-
-    let checkbox;
-    if (onToggleClick) {
-        if (hasPermissions) {
-            checkbox = <StyledCheckbox checked={!!selected} onChange={onToggleClick} />;
-        } else {
-            checkbox = <TextWithTooltip
-                tooltip={_t("You don't have permission")}
-                onClick={ev => { ev.stopPropagation(); }}
-            >
-                <StyledCheckbox disabled={true} />
-            </TextWithTooltip>;
-        }
-    }
-
-    let avatar;
-    if (joinedRoom) {
-        avatar = <RoomAvatar room={joinedRoom} width={20} height={20} />;
-    } else {
-        avatar = <BaseAvatar
-            name={name}
-            idName={room.room_id}
-            url={room.avatar_url ? mediaFromMxc(room.avatar_url).getSquareThumbnailHttp(20) : null}
-            width={20}
-            height={20}
-        />;
-    }
-
-    let description = _t("%(count)s members", { count: room.num_joined_members });
-    if (numChildRooms !== undefined) {
-        description += " · " + _t("%(count)s rooms", { count: numChildRooms });
-    }
-
-    const topic = joinedRoom?.currentState?.getStateEvents(EventType.RoomTopic, "")?.getContent()?.topic || room.topic;
-    if (topic) {
-        description += " · " + topic;
-    }
-
-    let suggestedSection;
-    if (suggested) {
-        suggestedSection = <InfoTooltip tooltip={_t("This room is suggested as a good one to join")}>
-            { _t("Suggested") }
-        </InfoTooltip>;
-    }
-
-    const content = <React.Fragment>
-        { avatar }
-        <div className="mx_SpaceRoomDirectory_roomTile_name">
-            { name }
-            { suggestedSection }
-        </div>
-
-        <div
-            className="mx_SpaceRoomDirectory_roomTile_info"
-            ref={e => e && linkifyElement(e)}
-            onClick={ev => {
-                // prevent clicks on links from bubbling up to the room tile
-                if ((ev.target as HTMLElement).tagName === "A") {
-                    ev.stopPropagation();
-                }
-            }}
-        >
-            { description }
-        </div>
-        <div className="mx_SpaceRoomDirectory_actions">
-            { button }
-            { checkbox }
-        </div>
-    </React.Fragment>;
-
-    let childToggle;
-    let childSection;
-    if (children) {
-        // the chevron is purposefully a div rather than a button as it should be ignored for a11y
-        childToggle = <div
-            className={classNames("mx_SpaceRoomDirectory_subspace_toggle", {
-                mx_SpaceRoomDirectory_subspace_toggle_shown: showChildren,
-            })}
-            onClick={ev => {
-                ev.stopPropagation();
-                toggleShowChildren();
-            }}
-        />;
-        if (showChildren) {
-            childSection = <div className="mx_SpaceRoomDirectory_subspace_children">
-                { children }
-            </div>;
-        }
-    }
-
-    return <>
-        <AccessibleButton
-            className={classNames("mx_SpaceRoomDirectory_roomTile", {
-                mx_SpaceRoomDirectory_subspace: room.room_type === RoomType.Space,
-            })}
-            onClick={(hasPermissions && onToggleClick) ? onToggleClick : onPreviewClick}
-        >
-            { content }
-            { childToggle }
-        </AccessibleButton>
-        { childSection }
-    </>;
-};
-
-export const showRoom = (room: ISpaceSummaryRoom, viaServers?: string[], autoJoin = false) => {
-    // Don't let the user view a room they won't be able to either peek or join:
-    // fail earlier so they don't have to click back to the directory.
-    if (MatrixClientPeg.get().isGuest()) {
-        if (!room.world_readable && !room.guest_can_join) {
-            dis.dispatch({ action: "require_registration" });
-            return;
-        }
-    }
-
-    const roomAlias = getDisplayAliasForRoom(room) || undefined;
-    dis.dispatch({
-        action: "view_room",
-        auto_join: autoJoin,
-        should_peek: true,
-        _type: "room_directory", // instrumentation
-        room_alias: roomAlias,
-        room_id: room.room_id,
-        via_servers: viaServers,
-        oob_data: {
-            avatarUrl: room.avatar_url,
-            // XXX: This logic is duplicated from the JS SDK which would normally decide what the name is.
-            name: room.name || roomAlias || _t("Unnamed room"),
-        },
-    });
-};
-
-interface IHierarchyLevelProps {
-    spaceId: string;
-    rooms: Map<string, ISpaceSummaryRoom>;
-    relations: Map<string, Map<string, ISpaceSummaryEvent>>;
-    parents: Set<string>;
-    selectedMap?: Map<string, Set<string>>;
-    onViewRoomClick(roomId: string, autoJoin: boolean): void;
-    onToggleClick?(parentId: string, childId: string): void;
-}
-
-export const HierarchyLevel = ({
-    spaceId,
-    rooms,
-    relations,
-    parents,
-    selectedMap,
-    onViewRoomClick,
-    onToggleClick,
-}: IHierarchyLevelProps) => {
-    const cli = MatrixClientPeg.get();
-    const space = cli.getRoom(spaceId);
-    const hasPermissions = space?.currentState.maySendStateEvent(EventType.SpaceChild, cli.getUserId());
-
-    const children = Array.from(relations.get(spaceId)?.values() || []);
-    const sortedChildren = sortBy(children, ev => {
-        // XXX: Space Summary API doesn't give the child origin_server_ts but once it does we should use it for sorting
-        return getChildOrder(ev.content.order, null, ev.state_key);
-    });
-    const [subspaces, childRooms] = sortedChildren.reduce((result, ev: ISpaceSummaryEvent) => {
-        const roomId = ev.state_key;
-        if (!rooms.has(roomId)) return result;
-        result[rooms.get(roomId).room_type === RoomType.Space ? 0 : 1].push(roomId);
-        return result;
-    }, [[], []]) || [[], []];
-
-    const newParents = new Set(parents).add(spaceId);
-    return <React.Fragment>
-        {
-            childRooms.map(roomId => (
-                <Tile
-                    key={roomId}
-                    room={rooms.get(roomId)}
-                    suggested={relations.get(spaceId)?.get(roomId)?.content.suggested}
-                    selected={selectedMap?.get(spaceId)?.has(roomId)}
-                    onViewRoomClick={(autoJoin) => {
-                        onViewRoomClick(roomId, autoJoin);
-                    }}
-                    hasPermissions={hasPermissions}
-                    onToggleClick={onToggleClick ? () => onToggleClick(spaceId, roomId) : undefined}
-                />
-            ))
-        }
-
-        {
-            subspaces.filter(roomId => !newParents.has(roomId)).map(roomId => (
-                <Tile
-                    key={roomId}
-                    room={rooms.get(roomId)}
-                    numChildRooms={Array.from(relations.get(roomId)?.values() || [])
-                        .filter(ev => rooms.has(ev.state_key) && !rooms.get(ev.state_key).room_type).length}
-                    suggested={relations.get(spaceId)?.get(roomId)?.content.suggested}
-                    selected={selectedMap?.get(spaceId)?.has(roomId)}
-                    onViewRoomClick={(autoJoin) => {
-                        onViewRoomClick(roomId, autoJoin);
-                    }}
-                    hasPermissions={hasPermissions}
-                    onToggleClick={onToggleClick ? () => onToggleClick(spaceId, roomId) : undefined}
-                >
-                    <HierarchyLevel
-                        spaceId={roomId}
-                        rooms={rooms}
-                        relations={relations}
-                        parents={newParents}
-                        selectedMap={selectedMap}
-                        onViewRoomClick={onViewRoomClick}
-                        onToggleClick={onToggleClick}
-                    />
-                </Tile>
-            ))
-        }
-    </React.Fragment>;
-};
-
-// mutate argument refreshToken to force a reload
-export const useSpaceSummary = (cli: MatrixClient, space: Room, refreshToken?: any): [
-    null,
-    ISpaceSummaryRoom[],
-    Map<string, Map<string, ISpaceSummaryEvent>>?,
-    Map<string, Set<string>>?,
-    Map<string, Set<string>>?,
-] | [Error] => {
-    // TODO pagination
-    return useAsyncMemo(async () => {
-        try {
-            const data = await cli.getSpaceSummary(space.roomId);
-
-            const parentChildRelations = new EnhancedMap<string, Map<string, ISpaceSummaryEvent>>();
-            const childParentRelations = new EnhancedMap<string, Set<string>>();
-            const viaMap = new EnhancedMap<string, Set<string>>();
-            data.events.map((ev: ISpaceSummaryEvent) => {
-                if (ev.type === EventType.SpaceChild) {
-                    parentChildRelations.getOrCreate(ev.room_id, new Map()).set(ev.state_key, ev);
-                    childParentRelations.getOrCreate(ev.state_key, new Set()).add(ev.room_id);
-                }
-                if (Array.isArray(ev.content.via)) {
-                    const set = viaMap.getOrCreate(ev.state_key, new Set());
-                    ev.content.via.forEach(via => set.add(via));
-                }
-            });
-
-            return [null, data.rooms as ISpaceSummaryRoom[], parentChildRelations, viaMap, childParentRelations];
-        } catch (e) {
-            console.error(e); // TODO
-            return [e];
-        }
-    }, [space, refreshToken], [undefined]);
-};
-
-export const SpaceHierarchy: React.FC<IHierarchyProps> = ({
-    space,
-    initialText = "",
-    showRoom,
-    refreshToken,
-    additionalButtons,
-    children,
-}) => {
-    const cli = MatrixClientPeg.get();
-    const userId = cli.getUserId();
-    const [query, setQuery] = useState(initialText);
-
-    const [selected, setSelected] = useState(new Map<string, Set<string>>()); // Map<parentId, Set<childId>>
-
-    const [summaryError, rooms, parentChildMap, viaMap, childParentMap] = useSpaceSummary(cli, space, refreshToken);
-
-    const roomsMap = useMemo(() => {
-        if (!rooms) return null;
-        const lcQuery = query.toLowerCase().trim();
-
-        const roomsMap = new Map<string, ISpaceSummaryRoom>(rooms.map(r => [r.room_id, r]));
-        if (!lcQuery) return roomsMap;
-
-        const directMatches = rooms.filter(r => {
-            return r.name?.toLowerCase().includes(lcQuery) || r.topic?.toLowerCase().includes(lcQuery);
-        });
-
-        // Walk back up the tree to find all parents of the direct matches to show their place in the hierarchy
-        const visited = new Set<string>();
-        const queue = [...directMatches.map(r => r.room_id)];
-        while (queue.length) {
-            const roomId = queue.pop();
-            visited.add(roomId);
-            childParentMap.get(roomId)?.forEach(parentId => {
-                if (!visited.has(parentId)) {
-                    queue.push(parentId);
-                }
-            });
-        }
-
-        // Remove any mappings for rooms which were not visited in the walk
-        Array.from(roomsMap.keys()).forEach(roomId => {
-            if (!visited.has(roomId)) {
-                roomsMap.delete(roomId);
-            }
-        });
-        return roomsMap;
-    }, [rooms, childParentMap, query]);
-
-    const [error, setError] = useState("");
-    const [removing, setRemoving] = useState(false);
-    const [saving, setSaving] = useState(false);
-
-    if (summaryError) {
-        return <p>{ _t("Your server does not support showing space hierarchies.") }</p>;
-    }
-
-    let content;
-    if (roomsMap) {
-        const numRooms = Array.from(roomsMap.values()).filter(r => !r.room_type).length;
-        const numSpaces = roomsMap.size - numRooms - 1; // -1 at the end to exclude the space we are looking at
-
-        let countsStr;
-        if (numSpaces > 1) {
-            countsStr = _t("%(count)s rooms and %(numSpaces)s spaces", { count: numRooms, numSpaces });
-        } else if (numSpaces > 0) {
-            countsStr = _t("%(count)s rooms and 1 space", { count: numRooms, numSpaces });
-        } else {
-            countsStr = _t("%(count)s rooms", { count: numRooms, numSpaces });
-        }
-
-        let manageButtons;
-        if (space.getMyMembership() === "join" && space.currentState.maySendStateEvent(EventType.SpaceChild, userId)) {
-            const selectedRelations = Array.from(selected.keys()).flatMap(parentId => {
-                return [...selected.get(parentId).values()].map(childId => [parentId, childId]) as [string, string][];
-            });
-
-            const selectionAllSuggested = selectedRelations.every(([parentId, childId]) => {
-                return parentChildMap.get(parentId)?.get(childId)?.content.suggested;
-            });
-
-            const disabled = !selectedRelations.length || removing || saving;
-
-            let Button: React.ComponentType<React.ComponentProps<typeof AccessibleButton>> = AccessibleButton;
-            let props = {};
-            if (!selectedRelations.length) {
-                Button = AccessibleTooltipButton;
-                props = {
-                    tooltip: _t("Select a room below first"),
-                    yOffset: -40,
-                };
-            }
-
-            manageButtons = <>
-                <Button
-                    {...props}
-                    onClick={async () => {
-                        setRemoving(true);
-                        try {
-                            for (const [parentId, childId] of selectedRelations) {
-                                await cli.sendStateEvent(parentId, EventType.SpaceChild, {}, childId);
-                                parentChildMap.get(parentId).delete(childId);
-                                if (parentChildMap.get(parentId).size > 0) {
-                                    parentChildMap.set(parentId, new Map(parentChildMap.get(parentId)));
-                                } else {
-                                    parentChildMap.delete(parentId);
-                                }
-                            }
-                        } catch (e) {
-                            setError(_t("Failed to remove some rooms. Try again later"));
-                        }
-                        setRemoving(false);
-                    }}
-                    kind="danger_outline"
-                    disabled={disabled}
-                >
-                    { removing ? _t("Removing...") : _t("Remove") }
-                </Button>
-                <Button
-                    {...props}
-                    onClick={async () => {
-                        setSaving(true);
-                        try {
-                            for (const [parentId, childId] of selectedRelations) {
-                                const suggested = !selectionAllSuggested;
-                                const existingContent = parentChildMap.get(parentId)?.get(childId)?.content;
-                                if (!existingContent || existingContent.suggested === suggested) continue;
-
-                                const content = {
-                                    ...existingContent,
-                                    suggested: !selectionAllSuggested,
-                                };
-
-                                await cli.sendStateEvent(parentId, EventType.SpaceChild, content, childId);
-
-                                parentChildMap.get(parentId).get(childId).content = content;
-                                parentChildMap.set(parentId, new Map(parentChildMap.get(parentId)));
-                            }
-                        } catch (e) {
-                            setError("Failed to update some suggestions. Try again later");
-                        }
-                        setSaving(false);
-                        setSelected(new Map());
-                    }}
-                    kind="primary_outline"
-                    disabled={disabled}
-                >
-                    { saving
-                        ? _t("Saving...")
-                        : (selectionAllSuggested ? _t("Mark as not suggested") : _t("Mark as suggested"))
-                    }
-                </Button>
-            </>;
-        }
-
-        let results;
-        if (roomsMap.size) {
-            const hasPermissions = space?.currentState.maySendStateEvent(EventType.SpaceChild, cli.getUserId());
-
-            results = <>
-                <HierarchyLevel
-                    spaceId={space.roomId}
-                    rooms={roomsMap}
-                    relations={parentChildMap}
-                    parents={new Set()}
-                    selectedMap={selected}
-                    onToggleClick={hasPermissions ? (parentId, childId) => {
-                        setError("");
-                        if (!selected.has(parentId)) {
-                            setSelected(new Map(selected.set(parentId, new Set([childId]))));
-                            return;
-                        }
-
-                        const parentSet = selected.get(parentId);
-                        if (!parentSet.has(childId)) {
-                            setSelected(new Map(selected.set(parentId, new Set([...parentSet, childId]))));
-                            return;
-                        }
-
-                        parentSet.delete(childId);
-                        setSelected(new Map(selected.set(parentId, new Set(parentSet))));
-                    } : undefined}
-                    onViewRoomClick={(roomId, autoJoin) => {
-                        showRoom(roomsMap.get(roomId), Array.from(viaMap.get(roomId) || []), autoJoin);
-                    }}
-                />
-                { children && <hr /> }
-            </>;
-        } else {
-            results = <div className="mx_SpaceRoomDirectory_noResults">
-                <h3>{ _t("No results found") }</h3>
-                <div>{ _t("You may want to try a different search or check for typos.") }</div>
-            </div>;
-        }
-
-        content = <>
-            <div className="mx_SpaceRoomDirectory_listHeader">
-                { countsStr }
-                <span>
-                    { additionalButtons }
-                    { manageButtons }
-                </span>
-            </div>
-            { error && <div className="mx_SpaceRoomDirectory_error">
-                { error }
-            </div> }
-            <AutoHideScrollbar className="mx_SpaceRoomDirectory_list">
-                { results }
-                { children }
-            </AutoHideScrollbar>
-        </>;
-    } else {
-        content = <Spinner />;
-    }
-
-    // TODO loading state/error state
-    return <>
-        <SearchBox
-            className="mx_textinput_icon mx_textinput_search"
-            placeholder={_t("Search names and descriptions")}
-            onSearch={setQuery}
-            autoFocus={true}
-            initialValue={initialText}
-        />
-
-        { content }
-    </>;
-};
-
-interface IProps {
-    space: Room;
-    initialText?: string;
-    onFinished(): void;
-}
-
-const SpaceRoomDirectory: React.FC<IProps> = ({ space, onFinished, initialText }) => {
-    const onCreateRoomClick = () => {
-        dis.dispatch({
-            action: 'view_create_room',
-            public: true,
-        });
-        onFinished();
-    };
-
-    const title = <React.Fragment>
-        <RoomAvatar room={space} height={32} width={32} />
-        <div>
-            <h1>{ _t("Explore rooms") }</h1>
-            <div><RoomName room={space} /></div>
-        </div>
-    </React.Fragment>;
-
-    return (
-        <BaseDialog className="mx_SpaceRoomDirectory" hasCancel={true} onFinished={onFinished} title={title}>
-            <div className="mx_Dialog_content">
-                { _t("If you can't find the room you're looking for, ask for an invite or <a>create a new room</a>.",
-                    null,
-                    { a: sub => {
-                        return <AccessibleButton kind="link" onClick={onCreateRoomClick}>{ sub }</AccessibleButton>;
-                    } },
-                ) }
-
-                <SpaceHierarchy
-                    space={space}
-                    showRoom={(room: ISpaceSummaryRoom, viaServers?: string[], autoJoin = false) => {
-                        showRoom(room, viaServers, autoJoin);
-                        onFinished();
-                    }}
-                    initialText={initialText}
-                >
-                    <AccessibleButton
-                        onClick={onCreateRoomClick}
-                        kind="primary"
-                        className="mx_SpaceRoomDirectory_createRoom"
-                    >
-                        { _t("Create room") }
-                    </AccessibleButton>
-                </SpaceHierarchy>
-            </div>
-        </BaseDialog>
-    );
-};
-
-export default SpaceRoomDirectory;
-
-// Similar to matrix-react-sdk's MatrixTools.getDisplayAliasForRoom
-// but works with the objects we get from the public room list
-function getDisplayAliasForRoom(room: ISpaceSummaryRoom) {
-    return getDisplayAliasForAliasSet(room.canonical_alias, room.aliases);
-}

src/components/structures/SpaceRoomView.tsx

@@ -16,7 +16,7 @@ limitations under the License.
 
 import React, { RefObject, useContext, useRef, useState } from "react";
 import { EventType } from "matrix-js-sdk/src/@types/event";
-import { Preset } from "matrix-js-sdk/src/@types/partials";
+import { JoinRule, Preset } from "matrix-js-sdk/src/@types/partials";
 import { Room } from "matrix-js-sdk/src/models/room";
 import { EventSubscription } from "fbemitter";
 
@@ -47,13 +47,23 @@ import { RightPanelPhases } from "../../stores/RightPanelStorePhases";
 import { SetRightPanelPhasePayload } from "../../dispatcher/payloads/SetRightPanelPhasePayload";
 import { useStateArray } from "../../hooks/useStateArray";
 import SpacePublicShare from "../views/spaces/SpacePublicShare";
-import { shouldShowSpaceSettings, showAddExistingRooms, showCreateNewRoom, showSpaceSettings } from "../../utils/space";
-import { showRoom, SpaceHierarchy } from "./SpaceRoomDirectory";
+import {
+    shouldShowSpaceSettings,
+    showAddExistingRooms,
+    showCreateNewRoom,
+    showCreateNewSubspace,
+    showSpaceSettings,
+} from "../../utils/space";
+import SpaceHierarchy, { showRoom } from "./SpaceHierarchy";
 import MemberAvatar from "../views/avatars/MemberAvatar";
-import { useStateToggle } from "../../hooks/useStateToggle";
 import SpaceStore from "../../stores/SpaceStore";
 import FacePile from "../views/elements/FacePile";
-import { AddExistingToSpace } from "../views/dialogs/AddExistingToSpaceDialog";
+import {
+    AddExistingToSpace,
+    defaultDmsRenderer,
+    defaultRoomsRenderer,
+    defaultSpacesRenderer,
+} from "../views/dialogs/AddExistingToSpaceDialog";
 import { ChevronFace, ContextMenuButton, useContextMenu } from "./ContextMenu";
 import IconizedContextMenu, {
     IconizedContextMenuOption,
@@ -62,11 +72,12 @@ import IconizedContextMenu, {
 import AccessibleTooltipButton from "../views/elements/AccessibleTooltipButton";
 import { BetaPill } from "../views/beta/BetaCard";
 import { UserTab } from "../views/dialogs/UserSettingsDialog";
-import Modal from "../../Modal";
-import BetaFeedbackDialog from "../views/dialogs/BetaFeedbackDialog";
-import SdkConfig from "../../SdkConfig";
 import { EffectiveMembership, getEffectiveMembership } from "../../utils/membership";
-import { JoinRule } from "../views/settings/tabs/room/SecurityRoomSettingsTab";
+import { SpaceFeedbackPrompt } from "../views/spaces/SpaceCreateMenu";
+import { CreateEventField, IGroupSummary } from "../views/dialogs/CreateSpaceFromCommunityDialog";
+import { useAsyncMemo } from "../../hooks/useAsyncMemo";
+import Spinner from "../views/elements/Spinner";
+import GroupAvatar from "../views/avatars/GroupAvatar";
 
 interface IProps {
     space: Room;
@@ -78,7 +89,7 @@ interface IProps {
 
 interface IState {
     phase: Phase;
-    createdRooms?: boolean; // internal state for the creation wizard
+    firstRoomId?: string; // internal state for the creation wizard
     showRightPanel: boolean;
     myMembership: string;
 }
@@ -93,26 +104,6 @@ enum Phase {
     PrivateExistingRooms,
 }
 
-// XXX: Temporary for the Spaces Beta only
-export const SpaceFeedbackPrompt = ({ onClick }: { onClick?: () => void }) => {
-    if (!SdkConfig.get().bug_report_endpoint_url) return null;
-
-    return <div className="mx_SpaceFeedbackPrompt">
-        <hr />
-        <div>
-            <span className="mx_SpaceFeedbackPrompt_text">{ _t("Spaces are a beta feature.") }</span>
-            <AccessibleButton kind="link" onClick={() => {
-                if (onClick) onClick();
-                Modal.createTrackedDialog("Beta Feedback", "feature_spaces", BetaFeedbackDialog, {
-                    featureId: "feature_spaces",
-                });
-            }}>
-                { _t("Feedback") }
-            </AccessibleButton>
-        </div>
-    </div>;
-};
-
 const RoomMemberCount = ({ room, children }) => {
     const members = useRoomMembers(room);
     const count = members.length;
@@ -171,7 +162,33 @@ const onBetaClick = () => {
     });
 };
 
-const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) => {
+// XXX: temporary community migration component
+const GroupTile = ({ groupId }: { groupId: string }) => {
+    const cli = useContext(MatrixClientContext);
+    const groupSummary = useAsyncMemo<IGroupSummary>(() => cli.getGroupSummary(groupId), [cli, groupId]);
+
+    if (!groupSummary) return <Spinner />;
+
+    return <>
+        <GroupAvatar
+            groupId={groupId}
+            groupName={groupSummary.profile.name}
+            groupAvatarUrl={groupSummary.profile.avatar_url}
+            width={16}
+            height={16}
+            resizeMethod='crop'
+        />
+        { groupSummary.profile.name }
+    </>;
+};
+
+interface ISpacePreviewProps {
+    space: Room;
+    onJoinButtonClicked(): void;
+    onRejectButtonClicked(): void;
+}
+
+const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }: ISpacePreviewProps) => {
     const cli = useContext(MatrixClientContext);
     const myMembership = useMyRoomMembership(space);
 
@@ -205,11 +222,11 @@ const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) =>
 
         if (inviteSender) {
             inviterSection = <div className="mx_SpaceRoomView_preview_inviter">
-                <MemberAvatar member={inviter} width={32} height={32} />
+                <MemberAvatar member={inviter} fallbackUserId={inviteSender} width={32} height={32} />
                 <div>
                     <div className="mx_SpaceRoomView_preview_inviter_name">
                         { _t("<inviter/> invites you", {}, {
-                            inviter: () => <b>{ inviter.name || inviteSender }</b>,
+                            inviter: () => <b>{ inviter?.name || inviteSender }</b>,
                         }) }
                     </div>
                     { inviter ? <div className="mx_SpaceRoomView_preview_inviter_mxid">
@@ -283,8 +300,18 @@ const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) =>
         </div>;
     }
 
+    let migratedCommunitySection: JSX.Element;
+    const createContent = space.currentState.getStateEvents(EventType.RoomCreate, "")?.getContent();
+    if (createContent[CreateEventField]) {
+        migratedCommunitySection = <div className="mx_SpaceRoomView_preview_migratedCommunity">
+            { _t("Created from <Community />", {}, {
+                Community: () => <GroupTile groupId={createContent[CreateEventField]} />,
+            }) }
+        </div>;
+    }
+
     return <div className="mx_SpaceRoomView_preview">
-        <BetaPill onClick={onBetaClick} />
+        { migratedCommunitySection }
         { inviterSection }
         <RoomAvatar room={space} height={80} width={80} viewAvatarOnClick={true} />
         <h1 className="mx_SpaceRoomView_preview_name">
@@ -306,8 +333,7 @@ const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }) =>
     </div>;
 };
 
-const SpaceLandingAddButton = ({ space, onNewRoomAdded }) => {
-    const cli = useContext(MatrixClientContext);
+const SpaceLandingAddButton = ({ space }) => {
     const [menuDisplayed, handle, openMenu, closeMenu] = useContextMenu();
 
     let contextMenu;
@@ -330,25 +356,33 @@ const SpaceLandingAddButton = ({ space, onNewRoomAdded }) => {
                         e.stopPropagation();
                         closeMenu();
 
-                        if (await showCreateNewRoom(cli, space)) {
-                            onNewRoomAdded();
+                        if (await showCreateNewRoom(space)) {
+                            defaultDispatcher.fire(Action.UpdateSpaceHierarchy);
                         }
                     }}
                 />
                 <IconizedContextMenuOption
                     label={_t("Add existing room")}
                     iconClassName="mx_RoomList_iconHash"
-                    onClick={async (e) => {
+                    onClick={(e) => {
                         e.preventDefault();
                         e.stopPropagation();
                         closeMenu();
-
-                        const [added] = await showAddExistingRooms(cli, space);
-                        if (added) {
-                            onNewRoomAdded();
-                        }
+                        showAddExistingRooms(space);
                     }}
                 />
+                <IconizedContextMenuOption
+                    label={_t("Add space")}
+                    iconClassName="mx_RoomList_iconPlus"
+                    onClick={(e) => {
+                        e.preventDefault();
+                        e.stopPropagation();
+                        closeMenu();
+                        showCreateNewSubspace(space);
+                    }}
+                >
+                    <BetaPill />
+                </IconizedContextMenuOption>
             </IconizedContextMenuOptionList>
         </IconizedContextMenu>;
     }
@@ -389,19 +423,17 @@ const SpaceLanding = ({ space }) => {
 
     const canAddRooms = myMembership === "join" && space.currentState.maySendStateEvent(EventType.SpaceChild, userId);
 
-    const [refreshToken, forceUpdate] = useStateToggle(false);
-
     let addRoomButton;
     if (canAddRooms) {
-        addRoomButton = <SpaceLandingAddButton space={space} onNewRoomAdded={forceUpdate} />;
+        addRoomButton = <SpaceLandingAddButton space={space} />;
     }
 
     let settingsButton;
-    if (shouldShowSpaceSettings(cli, space)) {
+    if (shouldShowSpaceSettings(space)) {
         settingsButton = <AccessibleTooltipButton
             className="mx_SpaceRoomView_landing_settingsButton"
             onClick={() => {
-                showSpaceSettings(cli, space);
+                showSpaceSettings(space);
             }}
             title={_t("Settings")}
         />;
@@ -416,6 +448,7 @@ const SpaceLanding = ({ space }) => {
     };
 
     return <div className="mx_SpaceRoomView_landing">
+        <SpaceFeedbackPrompt />
         <RoomAvatar room={space} height={80} width={80} viewAvatarOnClick={true} />
         <div className="mx_SpaceRoomView_landing_name">
             <RoomName room={space}>
@@ -440,15 +473,8 @@ const SpaceLanding = ({ space }) => {
                 </div>
             ) }
         </RoomTopic>
-        <SpaceFeedbackPrompt />
-        <hr />
 
-        <SpaceHierarchy
-            space={space}
-            showRoom={showRoom}
-            refreshToken={refreshToken}
-            additionalButtons={addRoomButton}
-        />
+        <SpaceHierarchy space={space} showRoom={showRoom} additionalButtons={addRoomButton} />
     </div>;
 };
 
@@ -470,6 +496,7 @@ const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
             onChange={ev => setRoomName(i, ev.target.value)}
             autoFocus={i === 2}
             disabled={busy}
+            autoComplete="off"
         />;
     });
 
@@ -479,11 +506,12 @@ const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
         setError("");
         setBusy(true);
         try {
+            const isPublic = space.getJoinRule() === JoinRule.Public;
             const filteredRoomNames = roomNames.map(name => name.trim()).filter(Boolean);
-            await Promise.all(filteredRoomNames.map(name => {
+            const roomIds = await Promise.all(filteredRoomNames.map(name => {
                 return createRoom({
                     createOpts: {
-                        preset: space.getJoinRule() === "public" ? Preset.PublicChat : Preset.PrivateChat,
+                        preset: isPublic ? Preset.PublicChat : Preset.PrivateChat,
                         name,
                     },
                     spinner: false,
@@ -491,9 +519,11 @@ const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
                     andView: false,
                     inlineErrors: true,
                     parentSpace: space,
+                    joinRule: !isPublic ? JoinRule.Restricted : undefined,
+                    suggested: true,
                 });
             }));
-            onFinished(filteredRoomNames.length > 0);
+            onFinished(roomIds[0]);
         } catch (e) {
             console.error("Failed to create initial space rooms", e);
             setError(_t("Failed to create initial space rooms"));
@@ -503,7 +533,7 @@ const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
 
     let onClick = (ev) => {
         ev.preventDefault();
-        onFinished(false);
+        onFinished();
     };
     let buttonLabel = _t("Skip for now");
     if (roomNames.some(name => name.trim())) {
@@ -531,7 +561,6 @@ const SpaceSetupFirstRooms = ({ space, title, description, onFinished }) => {
                 value={buttonLabel}
             />
         </div>
-        <SpaceFeedbackPrompt />
     </div>;
 };
 
@@ -550,17 +579,20 @@ const SpaceAddExistingRooms = ({ space, onFinished }) => {
                     { _t("Skip for now") }
                 </AccessibleButton>
             }
+            filterPlaceholder={_t("Search for rooms or spaces")}
             onFinished={onFinished}
+            roomsRenderer={defaultRoomsRenderer}
+            spacesRenderer={defaultSpacesRenderer}
+            dmsRenderer={defaultDmsRenderer}
         />
-
-        <div className="mx_SpaceRoomView_buttons">
-
-        </div>
-        <SpaceFeedbackPrompt />
     </div>;
 };
 
-const SpaceSetupPublicShare = ({ justCreatedOpts, space, onFinished, createdRooms }) => {
+interface ISpaceSetupPublicShareProps extends Pick<IProps & IState, "justCreatedOpts" | "space" | "firstRoomId"> {
+    onFinished(): void;
+}
+
+const SpaceSetupPublicShare = ({ justCreatedOpts, space, onFinished, firstRoomId }: ISpaceSetupPublicShareProps) => {
     return <div className="mx_SpaceRoomView_publicShare">
         <h1>{ _t("Share %(name)s", {
             name: justCreatedOpts?.createOpts?.name || space.name,
@@ -573,10 +605,9 @@ const SpaceSetupPublicShare = ({ justCreatedOpts, space, onFinished, createdRoom
 
         <div className="mx_SpaceRoomView_buttons">
             <AccessibleButton kind="primary" onClick={onFinished}>
-                { createdRooms ? _t("Go to my first room") : _t("Go to my space") }
+                { firstRoomId ? _t("Go to my first room") : _t("Go to my space") }
             </AccessibleButton>
         </div>
-        <SpaceFeedbackPrompt />
     </div>;
 };
 
@@ -605,9 +636,8 @@ const SpaceSetupPrivateScope = ({ space, justCreatedOpts, onFinished }) => {
         </AccessibleButton>
         <div className="mx_SpaceRoomView_betaWarning">
             <h3>{ _t("Teammates might not be able to view or join any private rooms you make.") }</h3>
-            <p>{ _t("We're working on this as part of the beta, but just want to let you know.") }</p>
+            <p>{ _t("We're working on this, but just want to let you know.") }</p>
         </div>
-        <SpaceFeedbackPrompt />
     </div>;
 };
 
@@ -730,7 +760,6 @@ const SpaceSetupPrivateInvite = ({ space, onFinished }) => {
                 value={buttonLabel}
             />
         </div>
-        <SpaceFeedbackPrompt />
     </div>;
 };
 
@@ -784,6 +813,11 @@ export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
     };
 
     private onAction = (payload: ActionPayload) => {
+        if (payload.action === "view_room" && payload.room_id === this.props.space.roomId) {
+            this.setState({ phase: Phase.Landing });
+            return;
+        }
+
         if (payload.action !== Action.ViewUser && payload.action !== "view_3pid_invite") return;
 
         if (payload.action === Action.ViewUser && payload.member) {
@@ -814,35 +848,10 @@ export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
     };
 
     private goToFirstRoom = async () => {
-        // TODO actually go to the first room
-
-        const childRooms = SpaceStore.instance.getChildRooms(this.props.space.roomId);
-        if (childRooms.length) {
-            const room = childRooms[0];
+        if (this.state.firstRoomId) {
             defaultDispatcher.dispatch({
                 action: "view_room",
-                room_id: room.roomId,
-            });
-            return;
-        }
-
-        let suggestedRooms = SpaceStore.instance.suggestedRooms;
-        if (SpaceStore.instance.activeSpace !== this.props.space) {
-            // the space store has the suggested rooms loaded for a different space, fetch the right ones
-            suggestedRooms = (await SpaceStore.instance.fetchSuggestedRooms(this.props.space, 1));
-        }
-
-        if (suggestedRooms.length) {
-            const room = suggestedRooms[0];
-            defaultDispatcher.dispatch({
-                action: "view_room",
-                room_id: room.room_id,
-                room_alias: room.canonical_alias || room.aliases?.[0],
-                via_servers: room.viaServers,
-                oobData: {
-                    avatarUrl: room.avatar_url,
-                    name: room.name || room.canonical_alias || room.aliases?.[0] || _t("Empty room"),
-                },
+                room_id: this.state.firstRoomId,
             });
             return;
         }
@@ -872,14 +881,14 @@ export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
                         _t("Let's create a room for each of them.") + "\n" +
                         _t("You can add more later too, including already existing ones.")
                     }
-                    onFinished={(createdRooms: boolean) => this.setState({ phase: Phase.PublicShare, createdRooms })}
+                    onFinished={(firstRoomId: string) => this.setState({ phase: Phase.PublicShare, firstRoomId })}
                 />;
             case Phase.PublicShare:
                 return <SpaceSetupPublicShare
                     justCreatedOpts={this.props.justCreatedOpts}
                     space={this.props.space}
                     onFinished={this.goToFirstRoom}
-                    createdRooms={this.state.createdRooms}
+                    firstRoomId={this.state.firstRoomId}
                 />;
 
             case Phase.PrivateScope:
@@ -901,7 +910,7 @@ export default class SpaceRoomView extends React.PureComponent<IProps, IState> {
                     title={_t("What projects are you working on?")}
                     description={_t("We'll create rooms for each of them. " +
                         "You can add more later too, including already existing ones.")}
-                    onFinished={(createdRooms: boolean) => this.setState({ phase: Phase.Landing, createdRooms })}
+                    onFinished={(firstRoomId: string) => this.setState({ phase: Phase.Landing, firstRoomId })}
                 />;
             case Phase.PrivateExistingRooms:
                 return <SpaceAddExistingRooms

src/components/structures/ThreadPanel.tsx

@@ -0,0 +1,93 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import { MatrixEvent, Room } from 'matrix-js-sdk/src';
+import { Thread } from 'matrix-js-sdk/src/models/thread';
+
+import BaseCard from "../views/right_panel/BaseCard";
+import { RightPanelPhases } from "../../stores/RightPanelStorePhases";
+import { replaceableComponent } from "../../utils/replaceableComponent";
+import { MatrixClientPeg } from '../../MatrixClientPeg';
+
+import ResizeNotifier from '../../utils/ResizeNotifier';
+import EventTile from '../views/rooms/EventTile';
+
+interface IProps {
+    roomId: string;
+    onClose: () => void;
+    resizeNotifier: ResizeNotifier;
+}
+
+interface IState {
+    threads?: Thread[];
+}
+
+@replaceableComponent("structures.ThreadView")
+export default class ThreadPanel extends React.Component<IProps, IState> {
+    private room: Room;
+
+    constructor(props: IProps) {
+        super(props);
+        this.room = MatrixClientPeg.get().getRoom(this.props.roomId);
+    }
+
+    public componentDidMount(): void {
+        this.room.on("Thread.update", this.onThreadEventReceived);
+        this.room.on("Thread.ready", this.onThreadEventReceived);
+    }
+
+    public componentWillUnmount(): void {
+        this.room.removeListener("Thread.update", this.onThreadEventReceived);
+        this.room.removeListener("Thread.ready", this.onThreadEventReceived);
+    }
+
+    private onThreadEventReceived = () => this.updateThreads();
+
+    private updateThreads = (callback?: () => void): void => {
+        this.setState({
+            threads: this.room.getThreads(),
+        }, callback);
+    };
+
+    private renderEventTile(event: MatrixEvent): JSX.Element {
+        return <EventTile
+            key={event.getId()}
+            mxEvent={event}
+            enableFlair={false}
+            showReadReceipts={false}
+            as="div"
+        />;
+    }
+
+    public render(): JSX.Element {
+        return (
+            <BaseCard
+                className="mx_ThreadPanel"
+                onClose={this.props.onClose}
+                previousPhase={RightPanelPhases.RoomSummary}
+            >
+                {
+                    this.state?.threads.map((thread: Thread) => {
+                        if (thread.ready) {
+                            return this.renderEventTile(thread.rootEvent);
+                        }
+                    })
+                }
+            </BaseCard>
+        );
+    }
+}

src/components/structures/ThreadView.tsx

@@ -0,0 +1,160 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import { MatrixEvent, Room } from 'matrix-js-sdk/src';
+import { Thread } from 'matrix-js-sdk/src/models/thread';
+
+import BaseCard from "../views/right_panel/BaseCard";
+import { RightPanelPhases } from "../../stores/RightPanelStorePhases";
+import { replaceableComponent } from "../../utils/replaceableComponent";
+
+import ResizeNotifier from '../../utils/ResizeNotifier';
+import { TileShape } from '../views/rooms/EventTile';
+import MessageComposer from '../views/rooms/MessageComposer';
+import { RoomPermalinkCreator } from '../../utils/permalinks/Permalinks';
+import { Layout } from '../../settings/Layout';
+import TimelinePanel from './TimelinePanel';
+import dis from "../../dispatcher/dispatcher";
+import { ActionPayload } from '../../dispatcher/payloads';
+import { SetRightPanelPhasePayload } from '../../dispatcher/payloads/SetRightPanelPhasePayload';
+import { Action } from '../../dispatcher/actions';
+import { MatrixClientPeg } from '../../MatrixClientPeg';
+import { E2EStatus } from '../../utils/ShieldUtils';
+
+interface IProps {
+    room: Room;
+    onClose: () => void;
+    resizeNotifier: ResizeNotifier;
+    mxEvent: MatrixEvent;
+    permalinkCreator?: RoomPermalinkCreator;
+    e2eStatus?: E2EStatus;
+}
+
+interface IState {
+    replyToEvent?: MatrixEvent;
+    thread?: Thread;
+}
+
+@replaceableComponent("structures.ThreadView")
+export default class ThreadView extends React.Component<IProps, IState> {
+    private dispatcherRef: string;
+    private timelinePanelRef: React.RefObject<TimelinePanel> = React.createRef();
+
+    constructor(props: IProps) {
+        super(props);
+        this.state = {};
+    }
+
+    public componentDidMount(): void {
+        this.setupThread(this.props.mxEvent);
+        this.dispatcherRef = dis.register(this.onAction);
+    }
+
+    public componentWillUnmount(): void {
+        this.teardownThread();
+        dis.unregister(this.dispatcherRef);
+    }
+
+    public componentDidUpdate(prevProps) {
+        if (prevProps.mxEvent !== this.props.mxEvent) {
+            this.teardownThread();
+            this.setupThread(this.props.mxEvent);
+        }
+
+        if (prevProps.room !== this.props.room) {
+            dis.dispatch<SetRightPanelPhasePayload>({
+                action: Action.SetRightPanelPhase,
+                phase: RightPanelPhases.RoomSummary,
+            });
+        }
+    }
+
+    private onAction = (payload: ActionPayload): void => {
+        if (payload.phase == RightPanelPhases.ThreadView && payload.event) {
+            if (payload.event !== this.props.mxEvent) {
+                this.teardownThread();
+                this.setupThread(payload.event);
+            }
+        }
+    };
+
+    private setupThread = (mxEv: MatrixEvent) => {
+        let thread = mxEv.getThread();
+        if (!thread) {
+            const client = MatrixClientPeg.get();
+            thread = new Thread([mxEv], this.props.room, client);
+            mxEv.setThread(thread);
+        }
+        thread.on("Thread.update", this.updateThread);
+        thread.once("Thread.ready", this.updateThread);
+        this.updateThread(thread);
+    };
+
+    private teardownThread = () => {
+        if (this.state.thread) {
+            this.state.thread.removeListener("Thread.update", this.updateThread);
+            this.state.thread.removeListener("Thread.ready", this.updateThread);
+        }
+    };
+
+    private updateThread = (thread?: Thread) => {
+        if (thread) {
+            this.setState({
+                thread,
+                replyToEvent: thread.replyToEvent,
+            });
+        }
+
+        this.timelinePanelRef.current?.refreshTimeline();
+    };
+
+    public render(): JSX.Element {
+        return (
+            <BaseCard
+                className="mx_ThreadView"
+                onClose={this.props.onClose}
+                previousPhase={RightPanelPhases.RoomSummary}
+                withoutScrollContainer={true}
+            >
+                { this.state.thread && (
+                    <TimelinePanel
+                        ref={this.timelinePanelRef}
+                        manageReadReceipts={false}
+                        manageReadMarkers={false}
+                        timelineSet={this.state?.thread?.timelineSet}
+                        showUrlPreview={false}
+                        tileShape={TileShape.Notif}
+                        empty={<div>empty</div>}
+                        alwaysShowTimestamps={true}
+                        layout={Layout.Group}
+                        hideThreadedMessages={false}
+                    />
+                ) }
+                <MessageComposer
+                    room={this.props.room}
+                    resizeNotifier={this.props.resizeNotifier}
+                    replyInThread={true}
+                    replyToEvent={this.state?.thread?.replyToEvent}
+                    showReplyPreview={false}
+                    permalinkCreator={this.props.permalinkCreator}
+                    e2eStatus={this.props.e2eStatus}
+                    compact={true}
+                />
+            </BaseCard>
+        );
+    }
+}

src/components/structures/TimelinePanel.tsx

@@ -47,11 +47,14 @@ import { RoomPermalinkCreator } from "../../utils/permalinks/Permalinks";
 import Spinner from "../views/elements/Spinner";
 import EditorStateTransfer from '../../utils/EditorStateTransfer';
 import ErrorDialog from '../views/dialogs/ErrorDialog';
+import { debounce } from 'lodash';
 
 const PAGINATE_SIZE = 20;
 const INITIAL_SIZE = 20;
 const READ_RECEIPT_INTERVAL_MS = 500;
 
+const READ_MARKER_DEBOUNCE_MS = 100;
+
 const DEBUG = false;
 
 let debuglog = function(...s: any[]) {};
@@ -126,6 +129,8 @@ interface IProps {
 
     // callback which is called when we wish to paginate the timeline window.
     onPaginationRequest?(timelineWindow: TimelineWindow, direction: string, size: number): Promise<boolean>;
+
+    hideThreadedMessages?: boolean;
 }
 
 interface IState {
@@ -214,6 +219,7 @@ class TimelinePanel extends React.Component<IProps, IState> {
         timelineCap: Number.MAX_VALUE,
         className: 'mx_RoomView_messagePanel',
         sendReadReceiptOnLoad: true,
+        hideThreadedMessages: true,
     };
 
     private lastRRSentEventId: string = undefined;
@@ -472,22 +478,35 @@ class TimelinePanel extends React.Component<IProps, IState> {
         }
 
         if (this.props.manageReadMarkers) {
-            const rmPosition = this.getReadMarkerPosition();
-            // we hide the read marker when it first comes onto the screen, but if
-            // it goes back off the top of the screen (presumably because the user
-            // clicks on the 'jump to bottom' button), we need to re-enable it.
-            if (rmPosition < 0) {
-                this.setState({ readMarkerVisible: true });
-            }
-
-            // if read marker position goes between 0 and -1/1,
-            // (and user is active), switch timeout
-            const timeout = this.readMarkerTimeout(rmPosition);
-            // NO-OP when timeout already has set to the given value
-            this.readMarkerActivityTimer.changeTimeout(timeout);
+            this.doManageReadMarkers();
         }
     };
 
+    /*
+     * Debounced function to manage read markers because we don't need to
+     * do this on every tiny scroll update. It also sets state which causes
+     * a component update, which can in turn reset the scroll position, so
+     * it's important we allow the browser to scroll a bit before running this
+     * (hence trailing edge only and debounce rather than throttle because
+     * we really only need to update this once the user has finished scrolling,
+     * not periodically while they scroll).
+     */
+    private doManageReadMarkers = debounce(() => {
+        const rmPosition = this.getReadMarkerPosition();
+        // we hide the read marker when it first comes onto the screen, but if
+        // it goes back off the top of the screen (presumably because the user
+        // clicks on the 'jump to bottom' button), we need to re-enable it.
+        if (rmPosition < 0) {
+            this.setState({ readMarkerVisible: true });
+        }
+
+        // if read marker position goes between 0 and -1/1,
+        // (and user is active), switch timeout
+        const timeout = this.readMarkerTimeout(rmPosition);
+        // NO-OP when timeout already has set to the given value
+        this.readMarkerActivityTimer.changeTimeout(timeout);
+    }, READ_MARKER_DEBOUNCE_MS, { leading: false, trailing: true });
+
     private onAction = (payload: ActionPayload): void => {
         switch (payload.action) {
             case "ignore_state_changed":
@@ -757,16 +776,20 @@ class TimelinePanel extends React.Component<IProps, IState> {
             }
             this.lastRMSentEventId = this.state.readMarkerEventId;
 
+            const roomId = this.props.timelineSet.room.roomId;
+            const hiddenRR = SettingsStore.getValue("feature_hidden_read_receipts", roomId);
+
             debuglog('TimelinePanel: Sending Read Markers for ',
                 this.props.timelineSet.room.roomId,
                 'rm', this.state.readMarkerEventId,
                 lastReadEvent ? 'rr ' + lastReadEvent.getId() : '',
+                ' hidden:' + hiddenRR,
             );
             MatrixClientPeg.get().setRoomReadMarkers(
-                this.props.timelineSet.room.roomId,
+                roomId,
                 this.state.readMarkerEventId,
                 lastReadEvent, // Could be null, in which case no RR is sent
-                {},
+                { hidden: hiddenRR },
             ).catch((e) => {
                 // /read_markers API is not implemented on this HS, fallback to just RR
                 if (e.errcode === 'M_UNRECOGNIZED' && lastReadEvent) {
@@ -1172,6 +1195,12 @@ class TimelinePanel extends React.Component<IProps, IState> {
         this.setState(this.getEvents());
     }
 
+    // Force refresh the timeline before threads support pending events
+    public refreshTimeline(): void {
+        this.loadTimeline();
+        this.reloadEvents();
+    }
+
     // get the list of events from the timeline window and the pending event list
     private getEvents(): Pick<IState, "events" | "liveEvents" | "firstVisibleEventIndex"> {
         const events: MatrixEvent[] = this.timelineWindow.getEvents();
@@ -1507,6 +1536,7 @@ class TimelinePanel extends React.Component<IProps, IState> {
                 showReactions={this.props.showReactions}
                 layout={this.props.layout}
                 enableFlair={SettingsStore.getValue(UIFeature.Flair)}
+                hideThreadedMessages={this.props.hideThreadedMessages}
             />
         );
     }

src/components/structures/ToastContainer.tsx

@@ -58,28 +58,39 @@ export default class ToastContainer extends React.Component<{}, IState> {
         let containerClasses;
         if (totalCount !== 0) {
             const topToast = this.state.toasts[0];
-            const { title, icon, key, component, className, props } = topToast;
-            const toastClasses = classNames("mx_Toast_toast", {
+            const { title, icon, key, component, className, bodyClassName, props } = topToast;
+            const bodyClasses = classNames("mx_Toast_body", bodyClassName);
+            const toastClasses = classNames("mx_Toast_toast", className, {
                 "mx_Toast_hasIcon": icon,
                 [`mx_Toast_icon_${icon}`]: icon,
-            }, className);
-
-            let countIndicator;
-            if (isStacked || this.state.countSeen > 0) {
-                countIndicator = ` (${this.state.countSeen + 1}/${this.state.countSeen + totalCount})`;
-            }
-
+            });
             const toastProps = Object.assign({}, props, {
                 key,
                 toastKey: key,
             });
-            toast = (<div className={toastClasses}>
-                <div className="mx_Toast_title">
-                    <h2>{ title }</h2>
-                    <span>{ countIndicator }</span>
+            const content = React.createElement(component, toastProps);
+
+            let countIndicator;
+            if (title && isStacked || this.state.countSeen > 0) {
+                countIndicator = ` (${this.state.countSeen + 1}/${this.state.countSeen + totalCount})`;
+            }
+
+            let titleElement;
+            if (title) {
+                titleElement = (
+                    <div className="mx_Toast_title">
+                        <h2>{ title }</h2>
+                        <span>{ countIndicator }</span>
+                    </div>
+                );
+            }
+
+            toast = (
+                <div className={toastClasses}>
+                    { titleElement }
+                    <div className={bodyClasses}>{ content }</div>
                 </div>
-                <div className="mx_Toast_body">{ React.createElement(component, toastProps) }</div>
-            </div>);
+            );
 
             containerClasses = classNames("mx_ToastContainer", {
                 "mx_ToastContainer_stacked": isStacked,

src/components/structures/auth/ForgotPassword.tsx

@@ -31,6 +31,7 @@ import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { PASSWORD_MIN_SCORE } from '../../views/auth/RegistrationForm';
 
 import { IValidationResult } from "../../views/elements/Validation";
+import InlineSpinner from '../../views/elements/InlineSpinner';
 
 enum Phase {
     // Show the forgot password inputs
@@ -66,13 +67,14 @@ interface IState {
     serverDeadError: string;
 
     passwordFieldValid: boolean;
+    currentHttpRequest?: Promise<any>;
 }
 
 @replaceableComponent("structures.auth.ForgotPassword")
 export default class ForgotPassword extends React.Component<IProps, IState> {
     private reset: PasswordReset;
 
-    state = {
+    state: IState = {
         phase: Phase.Forgot,
         email: "",
         password: "",
@@ -148,8 +150,10 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
             console.error("onVerify called before submitPasswordReset!");
             return;
         }
+        if (this.state.currentHttpRequest) return;
+
         try {
-            await this.reset.checkEmailLinkClicked();
+            await this.handleHttpRequest(this.reset.checkEmailLinkClicked());
             this.setState({ phase: Phase.Done });
         } catch (err) {
             this.showErrorDialog(err.message);
@@ -158,9 +162,10 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
 
     private onSubmitForm = async (ev: React.FormEvent): Promise<void> => {
         ev.preventDefault();
+        if (this.state.currentHttpRequest) return;
 
         // refresh the server errors, just in case the server came back online
-        await this.checkServerLiveliness(this.props.serverConfig);
+        await this.handleHttpRequest(this.checkServerLiveliness(this.props.serverConfig));
 
         await this['password_field'].validate({ allowEmpty: false });
 
@@ -221,6 +226,17 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
         });
     }
 
+    private handleHttpRequest<T = unknown>(request: Promise<T>): Promise<T> {
+        this.setState({
+            currentHttpRequest: request,
+        });
+        return request.finally(() => {
+            this.setState({
+                currentHttpRequest: undefined,
+            });
+        });
+    }
+
     renderForgot() {
         const Field = sdk.getComponent('elements.Field');
 
@@ -315,8 +331,14 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
             { _t("An email has been sent to %(emailAddress)s. Once you've followed the " +
                 "link it contains, click below.", { emailAddress: this.state.email }) }
             <br />
-            <input className="mx_Login_submit" type="button" onClick={this.onVerify}
+            <input
+                className="mx_Login_submit"
+                type="button"
+                onClick={this.onVerify}
                 value={_t('I have verified my email address')} />
+            { this.state.currentHttpRequest && (
+                <div className="mx_Login_spinner"><InlineSpinner w={64} h={64} /></div>)
+            }
         </div>;
     }
 
@@ -328,7 +350,10 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
                 "push notifications. To re-enable notifications, sign in again on each " +
                 "device.",
             ) }</p>
-            <input className="mx_Login_submit" type="button" onClick={this.props.onComplete}
+            <input
+                className="mx_Login_submit"
+                type="button"
+                onClick={this.props.onComplete}
                 value={_t('Return to login screen')} />
         </div>;
     }
@@ -351,6 +376,8 @@ export default class ForgotPassword extends React.Component<IProps, IState> {
             case Phase.Done:
                 resetPasswordJsx = this.renderDone();
                 break;
+            default:
+                resetPasswordJsx = <div className="mx_Login_spinner"><InlineSpinner w={64} h={64} /></div>;
         }
 
         return (

src/components/structures/auth/Login.tsx

@@ -463,7 +463,9 @@ export default class LoginComponent extends React.PureComponent<IProps, IState>
                         "Either use HTTPS or <a>enable unsafe scripts</a>.", {},
                     {
                         'a': (sub) => {
-                            return <a target="_blank" rel="noreferrer noopener"
+                            return <a
+                                target="_blank"
+                                rel="noreferrer noopener"
                                 href="https://www.google.com/search?&q=enable%20unsafe%20scripts"
                             >
                                 { sub }

src/components/structures/auth/Registration.tsx

@@ -557,12 +557,16 @@ export default class Registration extends React.Component<IProps, IState> {
                             loggedInUserId: this.state.differentLoggedInUserId,
                         },
                     ) }</p>
-                    <p><AccessibleButton element="span" className="mx_linkButton" onClick={async event => {
-                        const sessionLoaded = await this.onLoginClickWithCheck(event);
-                        if (sessionLoaded) {
-                            dis.dispatch({ action: "view_welcome_page" });
-                        }
-                    }}>
+                    <p><AccessibleButton
+                        element="span"
+                        className="mx_linkButton"
+                        onClick={async event => {
+                            const sessionLoaded = await this.onLoginClickWithCheck(event);
+                            if (sessionLoaded) {
+                                dis.dispatch({ action: "view_welcome_page" });
+                            }
+                        }}
+                    >
                         { _t("Continue with previous account") }
                     </AccessibleButton></p>
                 </div>;

src/components/views/audio_messages/AudioPlayer.tsx

@@ -14,9 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { Playback, PlaybackState } from "../../../voice/Playback";
 import React, { createRef, ReactNode, RefObject } from "react";
-import { UPDATE_EVENT } from "../../../stores/AsyncStore";
 import PlayPauseButton from "./PlayPauseButton";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { formatBytes } from "../../../utils/FormattingUtils";
@@ -25,47 +23,13 @@ import { Key } from "../../../Keyboard";
 import { _t } from "../../../languageHandler";
 import SeekBar from "./SeekBar";
 import PlaybackClock from "./PlaybackClock";
-
-interface IProps {
-    // Playback instance to render. Cannot change during component lifecycle: create
-    // an all-new component instead.
-    playback: Playback;
-
-    mediaName: string;
-}
-
-interface IState {
-    playbackPhase: PlaybackState;
-    error?: boolean;
-}
+import AudioPlayerBase from "./AudioPlayerBase";
 
 @replaceableComponent("views.audio_messages.AudioPlayer")
-export default class AudioPlayer extends React.PureComponent<IProps, IState> {
+export default class AudioPlayer extends AudioPlayerBase {
     private playPauseRef: RefObject<PlayPauseButton> = createRef();
     private seekRef: RefObject<SeekBar> = createRef();
 
-    constructor(props: IProps) {
-        super(props);
-
-        this.state = {
-            playbackPhase: PlaybackState.Decoding, // default assumption
-        };
-
-        // We don't need to de-register: the class handles this for us internally
-        this.props.playback.on(UPDATE_EVENT, this.onPlaybackUpdate);
-
-        // Don't wait for the promise to complete - it will emit a progress update when it
-        // is done, and it's not meant to take long anyhow.
-        this.props.playback.prepare().catch(e => {
-            console.error("Error processing audio file:", e);
-            this.setState({ error: true });
-        });
-    }
-
-    private onPlaybackUpdate = (ev: PlaybackState) => {
-        this.setState({ playbackPhase: ev });
-    };
-
     private onKeyDown = (ev: React.KeyboardEvent) => {
         // stopPropagation() prevents the FocusComposer catch-all from triggering,
         // but we need to do it on key down instead of press (even though the user
@@ -91,10 +55,10 @@ export default class AudioPlayer extends React.PureComponent<IProps, IState> {
         return `(${formatBytes(bytes)})`;
     }
 
-    public render(): ReactNode {
+    protected renderComponent(): ReactNode {
         // tabIndex=0 to ensure that the whole component becomes a tab stop, where we handle keyboard
         // events for accessibility
-        return <>
+        return (
             <div className='mx_MediaBody mx_AudioPlayer_container' tabIndex={0} onKeyDown={this.onKeyDown}>
                 <div className='mx_AudioPlayer_primaryContainer'>
                     <PlayPauseButton
@@ -124,7 +88,6 @@ export default class AudioPlayer extends React.PureComponent<IProps, IState> {
                     <PlaybackClock playback={this.props.playback} defaultDisplaySeconds={0} />
                 </div>
             </div>
-            { this.state.error && <div className="text-warning">{ _t("Error downloading audio") }</div> }
-        </>;
+        );
     }
 }

src/components/views/audio_messages/AudioPlayerBase.tsx

@@ -0,0 +1,70 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { Playback, PlaybackState } from "../../../audio/Playback";
+import { TileShape } from "../rooms/EventTile";
+import React, { ReactNode } from "react";
+import { UPDATE_EVENT } from "../../../stores/AsyncStore";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { _t } from "../../../languageHandler";
+
+interface IProps {
+    // Playback instance to render. Cannot change during component lifecycle: create
+    // an all-new component instead.
+    playback: Playback;
+
+    mediaName?: string;
+    tileShape?: TileShape;
+}
+
+interface IState {
+    playbackPhase: PlaybackState;
+    error?: boolean;
+}
+
+@replaceableComponent("views.audio_messages.AudioPlayerBase")
+export default abstract class AudioPlayerBase extends React.PureComponent<IProps, IState> {
+    constructor(props: IProps) {
+        super(props);
+
+        this.state = {
+            playbackPhase: PlaybackState.Decoding, // default assumption
+        };
+
+        // We don't need to de-register: the class handles this for us internally
+        this.props.playback.on(UPDATE_EVENT, this.onPlaybackUpdate);
+
+        // Don't wait for the promise to complete - it will emit a progress update when it
+        // is done, and it's not meant to take long anyhow.
+        this.props.playback.prepare().catch(e => {
+            console.error("Error processing audio file:", e);
+            this.setState({ error: true });
+        });
+    }
+
+    private onPlaybackUpdate = (ev: PlaybackState) => {
+        this.setState({ playbackPhase: ev });
+    };
+
+    protected abstract renderComponent(): ReactNode;
+
+    public render(): ReactNode {
+        return <>
+            { this.renderComponent() }
+            { this.state.error && <div className="text-warning">{ _t("Error downloading audio") }</div> }
+        </>;
+    }
+}

src/components/views/audio_messages/Clock.tsx

@@ -15,34 +15,30 @@ limitations under the License.
 */
 
 import React from "react";
+import { formatSeconds } from "../../../DateUtils";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 
 export interface IProps {
     seconds: number;
 }
 
-interface IState {
-}
-
 /**
  * Simply converts seconds into minutes and seconds. Note that hours will not be
  * displayed, making it possible to see "82:29".
  */
 @replaceableComponent("views.audio_messages.Clock")
-export default class Clock extends React.Component<IProps, IState> {
+export default class Clock extends React.Component<IProps> {
     public constructor(props) {
         super(props);
     }
 
-    shouldComponentUpdate(nextProps: Readonly<IProps>, nextState: Readonly<IState>, nextContext: any): boolean {
+    shouldComponentUpdate(nextProps: Readonly<IProps>): boolean {
         const currentFloor = Math.floor(this.props.seconds);
         const nextFloor = Math.floor(nextProps.seconds);
         return currentFloor !== nextFloor;
     }
 
     public render() {
-        const minutes = Math.floor(this.props.seconds / 60).toFixed(0).padStart(2, '0');
-        const seconds = Math.floor(this.props.seconds % 60).toFixed(0).padStart(2, '0'); // hide millis
-        return <span className='mx_Clock'>{ minutes }:{ seconds }</span>;
+        return <span className='mx_Clock'>{ formatSeconds(this.props.seconds) }</span>;
     }
 }

src/components/views/audio_messages/DurationClock.tsx

@@ -17,7 +17,7 @@ limitations under the License.
 import React from "react";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import Clock from "./Clock";
-import { Playback } from "../../../voice/Playback";
+import { Playback } from "../../../audio/Playback";
 
 interface IProps {
     playback: Playback;

src/components/views/audio_messages/LiveRecordingClock.tsx

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import React from "react";
-import { IRecordingUpdate, VoiceRecording } from "../../../voice/VoiceRecording";
+import { IRecordingUpdate, VoiceRecording } from "../../../audio/VoiceRecording";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import Clock from "./Clock";
 import { MarkedExecution } from "../../../utils/MarkedExecution";

src/components/views/audio_messages/LiveRecordingWaveform.tsx

@@ -15,10 +15,9 @@ limitations under the License.
 */
 
 import React from "react";
-import { IRecordingUpdate, RECORDING_PLAYBACK_SAMPLES, VoiceRecording } from "../../../voice/VoiceRecording";
+import { IRecordingUpdate, RECORDING_PLAYBACK_SAMPLES, VoiceRecording } from "../../../audio/VoiceRecording";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
-import { arrayFastResample } from "../../../utils/arrays";
-import { percentageOf } from "../../../utils/numbers";
+import { arrayFastResample, arraySeed } from "../../../utils/arrays";
 import Waveform from "./Waveform";
 import { MarkedExecution } from "../../../utils/MarkedExecution";
 
@@ -48,18 +47,14 @@ export default class LiveRecordingWaveform extends React.PureComponent<IProps, I
     constructor(props) {
         super(props);
         this.state = {
-            waveform: [],
+            waveform: arraySeed(0, RECORDING_PLAYBACK_SAMPLES),
         };
     }
 
     componentDidMount() {
         this.props.recorder.liveData.onUpdate((update: IRecordingUpdate) => {
-            const bars = arrayFastResample(Array.from(update.waveform), RECORDING_PLAYBACK_SAMPLES);
-            // The incoming data is between zero and one, but typically even screaming into a
-            // microphone won't send you over 0.6, so we artificially adjust the gain for the
-            // waveform. This results in a slightly more cinematic/animated waveform for the
-            // user.
-            this.waveform = bars.map(b => percentageOf(b, 0, 0.50));
+            // The incoming data is between zero and one, so we don't need to clamp/rescale it.
+            this.waveform = arrayFastResample(Array.from(update.waveform), RECORDING_PLAYBACK_SAMPLES);
             this.scheduledUpdate.mark();
         });
     }

src/components/views/audio_messages/PlayPauseButton.tsx

@@ -18,7 +18,7 @@ import React, { ReactNode } from "react";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import { _t } from "../../../languageHandler";
-import { Playback, PlaybackState } from "../../../voice/Playback";
+import { Playback, PlaybackState } from "../../../audio/Playback";
 import classNames from "classnames";
 
 // omitted props are handled by render function

src/components/views/audio_messages/PlaybackClock.tsx

@@ -17,7 +17,7 @@ limitations under the License.
 import React from "react";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import Clock from "./Clock";
-import { Playback, PlaybackState } from "../../../voice/Playback";
+import { Playback, PlaybackState } from "../../../audio/Playback";
 import { UPDATE_EVENT } from "../../../stores/AsyncStore";
 
 interface IProps {

src/components/views/audio_messages/PlaybackWaveform.tsx

@@ -18,7 +18,7 @@ import React from "react";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { arraySeed, arrayTrimFill } from "../../../utils/arrays";
 import Waveform from "./Waveform";
-import { Playback, PLAYBACK_WAVEFORM_SAMPLES } from "../../../voice/Playback";
+import { Playback, PLAYBACK_WAVEFORM_SAMPLES } from "../../../audio/Playback";
 import { percentageOf } from "../../../utils/numbers";
 
 interface IProps {

src/components/views/audio_messages/RecordingPlayback.tsx

@@ -14,68 +14,30 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { Playback, PlaybackState } from "../../../voice/Playback";
 import React, { ReactNode } from "react";
-import { UPDATE_EVENT } from "../../../stores/AsyncStore";
 import PlayPauseButton from "./PlayPauseButton";
 import PlaybackClock from "./PlaybackClock";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { TileShape } from "../rooms/EventTile";
 import PlaybackWaveform from "./PlaybackWaveform";
-import { _t } from "../../../languageHandler";
-
-interface IProps {
-    // Playback instance to render. Cannot change during component lifecycle: create
-    // an all-new component instead.
-    playback: Playback;
-
-    tileShape?: TileShape;
-}
-
-interface IState {
-    playbackPhase: PlaybackState;
-    error?: boolean;
-}
+import AudioPlayerBase from "./AudioPlayerBase";
 
 @replaceableComponent("views.audio_messages.RecordingPlayback")
-export default class RecordingPlayback extends React.PureComponent<IProps, IState> {
-    constructor(props: IProps) {
-        super(props);
-
-        this.state = {
-            playbackPhase: PlaybackState.Decoding, // default assumption
-        };
-
-        // We don't need to de-register: the class handles this for us internally
-        this.props.playback.on(UPDATE_EVENT, this.onPlaybackUpdate);
-
-        // Don't wait for the promise to complete - it will emit a progress update when it
-        // is done, and it's not meant to take long anyhow.
-        this.props.playback.prepare().catch(e => {
-            console.error("Error processing audio file:", e);
-            this.setState({ error: true });
-        });
-    }
-
+export default class RecordingPlayback extends AudioPlayerBase {
     private get isWaveformable(): boolean {
         return this.props.tileShape !== TileShape.Notif
             && this.props.tileShape !== TileShape.FileGrid
             && this.props.tileShape !== TileShape.Pinned;
     }
 
-    private onPlaybackUpdate = (ev: PlaybackState) => {
-        this.setState({ playbackPhase: ev });
-    };
-
-    public render(): ReactNode {
+    protected renderComponent(): ReactNode {
         const shapeClass = !this.isWaveformable ? 'mx_VoiceMessagePrimaryContainer_noWaveform' : '';
-        return <>
+        return (
             <div className={'mx_MediaBody mx_VoiceMessagePrimaryContainer ' + shapeClass}>
                 <PlayPauseButton playback={this.props.playback} playbackPhase={this.state.playbackPhase} />
                 <PlaybackClock playback={this.props.playback} />
                 { this.isWaveformable && <PlaybackWaveform playback={this.props.playback} /> }
             </div>
-            { this.state.error && <div className="text-warning">{ _t("Error downloading audio") }</div> }
-        </>;
+        );
     }
 }

src/components/views/audio_messages/SeekBar.tsx

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import { Playback, PlaybackState } from "../../../voice/Playback";
+import { Playback, PlaybackState } from "../../../audio/Playback";
 import React, { ChangeEvent, CSSProperties, ReactNode } from "react";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { MarkedExecution } from "../../../utils/MarkedExecution";

src/components/views/audio_messages/Waveform.tsx

@@ -54,9 +54,13 @@ export default class Waveform extends React.PureComponent<IProps, IState> {
                     'mx_Waveform_bar': true,
                     'mx_Waveform_bar_100pct': isCompleteBar,
                 });
-                return <span key={i} style={{
-                    "--barHeight": h,
-                } as WaveformCSSProperties} className={classes} />;
+                return <span
+                    key={i}
+                    style={{
+                        "--barHeight": h,
+                    } as WaveformCSSProperties}
+                    className={classes}
+                />;
             }) }
         </div>;
     }

src/components/views/auth/CaptchaForm.tsx

@@ -103,8 +103,8 @@ export default class CaptchaForm extends React.Component<ICaptchaFormProps, ICap
     }
 
     private resetRecaptcha() {
-        if (this.captchaWidgetId !== null) {
-            global.grecaptcha.reset(this.captchaWidgetId);
+        if (this.captchaWidgetId) {
+            global?.grecaptcha?.reset(this.captchaWidgetId);
         }
     }
 

src/components/views/auth/InteractiveAuthEntryComponents.tsx

@@ -17,6 +17,7 @@ limitations under the License.
 import React, { ChangeEvent, createRef, FormEvent, MouseEvent } from 'react';
 import classNames from 'classnames';
 import { MatrixClient } from "matrix-js-sdk/src/client";
+import { AuthType, IAuthDict, IInputs, IStageStatus } from 'matrix-js-sdk/src/interactive-auth';
 
 import { _t } from '../../../languageHandler';
 import SettingsStore from "../../../settings/SettingsStore";
@@ -74,33 +75,6 @@ import CaptchaForm from "./CaptchaForm";
  *    focus: set the input focus appropriately in the form.
  */
 
-enum AuthType {
-    Password = "m.login.password",
-    Recaptcha = "m.login.recaptcha",
-    Terms = "m.login.terms",
-    Email = "m.login.email.identity",
-    Msisdn = "m.login.msisdn",
-    Sso = "m.login.sso",
-    SsoUnstable = "org.matrix.login.sso",
-}
-
-/* eslint-disable camelcase */
-interface IAuthDict {
-    type?: AuthType;
-    // TODO: Remove `user` once servers support proper UIA
-    // See https://github.com/vector-im/element-web/issues/10312
-    user?: string;
-    identifier?: any;
-    password?: string;
-    response?: string;
-    // TODO: Remove `threepid_creds` once servers support proper UIA
-    // See https://github.com/vector-im/element-web/issues/10312
-    // See https://github.com/matrix-org/matrix-doc/issues/2220
-    threepid_creds?: any;
-    threepidCreds?: any;
-}
-/* eslint-enable camelcase */
-
 export const DEFAULT_PHASE = 0;
 
 interface IAuthEntryProps {
@@ -416,8 +390,10 @@ export class TermsAuthEntry extends React.Component<ITermsAuthEntryProps, ITerms
         let submitButton;
         if (this.props.showContinue !== false) {
             // XXX: button classes
-            submitButton = <button className="mx_InteractiveAuthEntryComponents_termsSubmit mx_GeneralButton"
-                onClick={this.trySubmit} disabled={!allChecked}>{ _t("Accept") }</button>;
+            submitButton = <button
+                className="mx_InteractiveAuthEntryComponents_termsSubmit mx_GeneralButton"
+                onClick={this.trySubmit}
+                disabled={!allChecked}>{ _t("Accept") }</button>;
         }
 
         return (
@@ -616,7 +592,9 @@ export class MsisdnAuthEntry extends React.Component<IMsisdnAuthEntryProps, IMsi
                                 aria-label={_t("Code")}
                             />
                             <br />
-                            <input type="submit" value={_t("Submit")}
+                            <input
+                                type="submit"
+                                value={_t("Submit")}
                                 className={submitClasses}
                                 disabled={!enableSubmit}
                             />
@@ -831,7 +809,26 @@ export class FallbackAuthEntry extends React.Component<IAuthEntryProps> {
     }
 }
 
-export default function getEntryComponentForLoginType(loginType: AuthType): typeof React.Component {
+export interface IStageComponentProps extends IAuthEntryProps {
+    clientSecret?: string;
+    stageParams?: Record<string, any>;
+    inputs?: IInputs;
+    stageState?: IStageStatus;
+    showContinue?: boolean;
+    continueText?: string;
+    continueKind?: string;
+    fail?(e: Error): void;
+    setEmailSid?(sid: string): void;
+    onCancel?(): void;
+}
+
+export interface IStageComponent extends React.ComponentClass<React.PropsWithRef<IStageComponentProps>> {
+    tryContinue?(): void;
+    attemptFailed?(): void;
+    focus?(): void;
+}
+
+export default function getEntryComponentForLoginType(loginType: AuthType): IStageComponent {
     switch (loginType) {
         case AuthType.Password:
             return PasswordAuthEntry;

src/components/views/avatars/BaseAvatar.tsx

@@ -187,7 +187,8 @@ const BaseAvatar = (props: IProps) => {
                     width: toPx(width),
                     height: toPx(height),
                 }}
-                title={title} alt={_t("Avatar")}
+                title={title}
+                alt={_t("Avatar")}
                 inputRef={inputRef}
                 {...otherProps} />
         );
@@ -201,7 +202,8 @@ const BaseAvatar = (props: IProps) => {
                     width: toPx(width),
                     height: toPx(height),
                 }}
-                title={title} alt=""
+                title={title}
+                alt=""
                 ref={inputRef}
                 {...otherProps} />
         );

src/components/views/avatars/MemberAvatar.tsx

@@ -36,6 +36,7 @@ interface IProps extends Omit<React.ComponentProps<typeof BaseAvatar>, "name" |
     // Whether the onClick of the avatar should be overriden to dispatch `Action.ViewUser`
     viewUserOnClick?: boolean;
     title?: string;
+    style?: any;
 }
 
 interface IState {
@@ -102,8 +103,12 @@ export default class MemberAvatar extends React.Component<IProps, IState> {
         }
 
         return (
-            <BaseAvatar {...otherProps} name={this.state.name} title={this.state.title}
-                idName={userId} url={this.state.imageUrl} onClick={onClick} />
+            <BaseAvatar {...otherProps}
+                name={this.state.name}
+                title={this.state.title}
+                idName={userId}
+                url={this.state.imageUrl}
+                onClick={onClick} />
         );
     }
 }

src/components/views/avatars/RoomAvatar.tsx

@@ -13,9 +13,11 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
+
 import React, { ComponentProps } from 'react';
 import { Room } from 'matrix-js-sdk/src/models/room';
 import { ResizeMethod } from 'matrix-js-sdk/src/@types/partials';
+import classNames from "classnames";
 
 import BaseAvatar from './BaseAvatar';
 import ImageView from '../elements/ImageView';
@@ -32,11 +34,14 @@ interface IProps extends Omit<ComponentProps<typeof BaseAvatar>, "name" | "idNam
     // oobData.avatarUrl should be set (else there
     // would be nowhere to get the avatar from)
     room?: Room;
-    oobData?: IOOBData;
+    oobData?: IOOBData & {
+        roomId?: string;
+    };
     width?: number;
     height?: number;
     resizeMethod?: ResizeMethod;
     viewAvatarOnClick?: boolean;
+    className?: string;
     onClick?(): void;
 }
 
@@ -129,15 +134,19 @@ export default class RoomAvatar extends React.Component<IProps, IState> {
     };
 
     public render() {
-        const { room, oobData, viewAvatarOnClick, onClick, ...otherProps } = this.props;
+        const { room, oobData, viewAvatarOnClick, onClick, className, ...otherProps } = this.props;
 
         const roomName = room ? room.name : oobData.name;
         // If the room is a DM, we use the other user's ID for the color hash
         // in order to match the room avatar with their avatar
-        const idName = room ? (DMRoomMap.shared().getUserIdForRoomId(room.roomId) ?? room.roomId) : null;
+        const idName = room ? (DMRoomMap.shared().getUserIdForRoomId(room.roomId) ?? room.roomId) : oobData.roomId;
 
         return (
-            <BaseAvatar {...otherProps}
+            <BaseAvatar
+                {...otherProps}
+                className={classNames(className, {
+                    mx_RoomAvatar_isSpaceRoom: room?.isSpaceRoom(),
+                })}
                 name={roomName}
                 idName={idName}
                 urls={this.state.urls}

src/components/views/beta/BetaCard.tsx

@@ -27,6 +27,8 @@ import BetaFeedbackDialog from "../dialogs/BetaFeedbackDialog";
 import SdkConfig from "../../../SdkConfig";
 import SettingsFlag from "../elements/SettingsFlag";
 
+// XXX: Keep this around for re-use in future Betas
+
 interface IProps {
     title?: string;
     featureId: string;

src/components/views/context_menus/DialpadContextMenu.tsx

@@ -14,8 +14,9 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
-import AccessibleButton from "../elements/AccessibleButton";
+import * as React from "react";
+import { createRef } from "react";
+import AccessibleButton, { ButtonEvent } from "../elements/AccessibleButton";
 import { ContextMenu, IProps as IContextMenuProps } from '../../structures/ContextMenu';
 import { MatrixCall } from 'matrix-js-sdk/src/webrtc/call';
 import Field from "../elements/Field";
@@ -32,6 +33,8 @@ interface IState {
 
 @replaceableComponent("views.context_menus.DialpadContextMenu")
 export default class DialpadContextMenu extends React.Component<IProps, IState> {
+    private numberEntryFieldRef: React.RefObject<Field> = createRef();
+
     constructor(props) {
         super(props);
 
@@ -40,15 +43,29 @@ export default class DialpadContextMenu extends React.Component<IProps, IState>
         };
     }
 
-    onDigitPress = (digit) => {
+    onDigitPress = (digit: string, ev: ButtonEvent) => {
         this.props.call.sendDtmfDigit(digit);
         this.setState({ value: this.state.value + digit });
+
+        // Keep the number field focused so that keyboard entry is still available
+        // However, don't focus if this wasn't the result of directly clicking on the button,
+        // i.e someone using keyboard navigation.
+        if (ev.type === "click") {
+            this.numberEntryFieldRef.current?.focus();
+        }
     };
 
     onCancelClick = () => {
         this.props.onFinished();
     };
 
+    onKeyDown = (ev) => {
+        // Prevent Backspace and Delete keys from functioning in the entry field
+        if (ev.code === "Backspace" || ev.code === "Delete") {
+            ev.preventDefault();
+        }
+    };
+
     onChange = (ev) => {
         this.setState({ value: ev.target.value });
     };
@@ -60,8 +77,12 @@ export default class DialpadContextMenu extends React.Component<IProps, IState>
                     <AccessibleButton className="mx_DialPadContextMenu_cancel" onClick={this.onCancelClick} />
                 </div>
                 <div className="mx_DialPadContextMenu_header">
-                    <Field className="mx_DialPadContextMenu_dialled"
-                        value={this.state.value} autoFocus={true}
+                    <Field
+                        ref={this.numberEntryFieldRef}
+                        className="mx_DialPadContextMenu_dialled"
+                        value={this.state.value}
+                        autoFocus={true}
+                        onKeyDown={this.onKeyDown}
                         onChange={this.onChange}
                     />
                 </div>

src/components/views/context_menus/IconizedContextMenu.tsx

@@ -86,14 +86,18 @@ export const IconizedContextMenuCheckbox: React.FC<ICheckboxProps> = ({
     >
         <span className={classNames("mx_IconizedContextMenu_icon", iconClassName)} />
         <span className="mx_IconizedContextMenu_label">{ label }</span>
-        { active && <span className="mx_IconizedContextMenu_icon mx_IconizedContextMenu_checked" /> }
+        <span className={classNames("mx_IconizedContextMenu_icon", {
+            mx_IconizedContextMenu_checked: active,
+            mx_IconizedContextMenu_unchecked: !active,
+        })} />
     </MenuItemCheckbox>;
 };
 
-export const IconizedContextMenuOption: React.FC<IOptionProps> = ({ label, iconClassName, ...props }) => {
+export const IconizedContextMenuOption: React.FC<IOptionProps> = ({ label, iconClassName, children, ...props }) => {
     return <MenuItem {...props} label={label}>
         { iconClassName && <span className={classNames("mx_IconizedContextMenu_icon", iconClassName)} /> }
         <span className="mx_IconizedContextMenu_label">{ label }</span>
+        { children }
     </MenuItem>;
 };
 

src/components/views/context_menus/SpaceContextMenu.tsx

@@ -0,0 +1,216 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useContext } from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+import { EventType } from "matrix-js-sdk/src/@types/event";
+
+import {
+    IProps as IContextMenuProps,
+} from "../../structures/ContextMenu";
+import IconizedContextMenu, { IconizedContextMenuOption, IconizedContextMenuOptionList } from "./IconizedContextMenu";
+import { _t } from "../../../languageHandler";
+import {
+    leaveSpace,
+    shouldShowSpaceSettings,
+    showAddExistingRooms,
+    showCreateNewRoom,
+    showCreateNewSubspace,
+    showSpaceInvite,
+    showSpaceSettings,
+} from "../../../utils/space";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import { ButtonEvent } from "../elements/AccessibleButton";
+import defaultDispatcher from "../../../dispatcher/dispatcher";
+import RoomViewStore from "../../../stores/RoomViewStore";
+import { SetRightPanelPhasePayload } from "../../../dispatcher/payloads/SetRightPanelPhasePayload";
+import { Action } from "../../../dispatcher/actions";
+import { RightPanelPhases } from "../../../stores/RightPanelStorePhases";
+import { BetaPill } from "../beta/BetaCard";
+
+interface IProps extends IContextMenuProps {
+    space: Room;
+}
+
+const SpaceContextMenu = ({ space, onFinished, ...props }: IProps) => {
+    const cli = useContext(MatrixClientContext);
+    const userId = cli.getUserId();
+
+    let inviteOption;
+    if (space.getJoinRule() === "public" || space.canInvite(userId)) {
+        const onInviteClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            showSpaceInvite(space);
+            onFinished();
+        };
+
+        inviteOption = (
+            <IconizedContextMenuOption
+                className="mx_SpacePanel_contextMenu_inviteButton"
+                iconClassName="mx_SpacePanel_iconInvite"
+                label={_t("Invite people")}
+                onClick={onInviteClick}
+            />
+        );
+    }
+
+    let settingsOption;
+    let leaveSection;
+    if (shouldShowSpaceSettings(space)) {
+        const onSettingsClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            showSpaceSettings(space);
+            onFinished();
+        };
+
+        settingsOption = (
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconSettings"
+                label={_t("Settings")}
+                onClick={onSettingsClick}
+            />
+        );
+    } else {
+        const onLeaveClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            leaveSpace(space);
+            onFinished();
+        };
+
+        leaveSection = <IconizedContextMenuOptionList red first>
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconLeave"
+                label={_t("Leave space")}
+                onClick={onLeaveClick}
+            />
+        </IconizedContextMenuOptionList>;
+    }
+
+    const canAddRooms = space.currentState.maySendStateEvent(EventType.SpaceChild, userId);
+
+    let newRoomSection;
+    if (space.currentState.maySendStateEvent(EventType.SpaceChild, userId)) {
+        const onNewRoomClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            showCreateNewRoom(space);
+            onFinished();
+        };
+
+        const onAddExistingRoomClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            showAddExistingRooms(space);
+            onFinished();
+        };
+
+        const onNewSubspaceClick = (ev: ButtonEvent) => {
+            ev.preventDefault();
+            ev.stopPropagation();
+
+            showCreateNewSubspace(space);
+            onFinished();
+        };
+
+        newRoomSection = <IconizedContextMenuOptionList first>
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconPlus"
+                label={_t("Create new room")}
+                onClick={onNewRoomClick}
+            />
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconHash"
+                label={_t("Add existing room")}
+                onClick={onAddExistingRoomClick}
+            />
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconPlus"
+                label={_t("Add space")}
+                onClick={onNewSubspaceClick}
+            >
+                <BetaPill />
+            </IconizedContextMenuOption>
+        </IconizedContextMenuOptionList>;
+    }
+
+    const onMembersClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        if (!RoomViewStore.getRoomId()) {
+            defaultDispatcher.dispatch({
+                action: "view_room",
+                room_id: space.roomId,
+            }, true);
+        }
+
+        defaultDispatcher.dispatch<SetRightPanelPhasePayload>({
+            action: Action.SetRightPanelPhase,
+            phase: RightPanelPhases.SpaceMemberList,
+            refireParams: { space },
+        });
+        onFinished();
+    };
+
+    const onExploreRoomsClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        defaultDispatcher.dispatch({
+            action: "view_room",
+            room_id: space.roomId,
+        });
+        onFinished();
+    };
+
+    return <IconizedContextMenu
+        {...props}
+        onFinished={onFinished}
+        className="mx_SpacePanel_contextMenu"
+        compact
+    >
+        <div className="mx_SpacePanel_contextMenu_header">
+            { space.name }
+        </div>
+        <IconizedContextMenuOptionList first>
+            { inviteOption }
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconMembers"
+                label={_t("Members")}
+                onClick={onMembersClick}
+            />
+            { settingsOption }
+            <IconizedContextMenuOption
+                iconClassName="mx_SpacePanel_iconExplore"
+                label={canAddRooms ? _t("Manage & explore rooms") : _t("Explore rooms")}
+                onClick={onExploreRoomsClick}
+            />
+        </IconizedContextMenuOptionList>
+        { newRoomSection }
+        { leaveSection }
+    </IconizedContextMenu>;
+};
+
+export default SpaceContextMenu;
+

src/components/views/context_menus/StatusMessageContextMenu.js

@@ -109,8 +109,10 @@ export default class StatusMessageContextMenu extends React.Component {
                 </AccessibleButton>;
             }
         } else {
-            actionButton = <AccessibleButton className="mx_StatusMessageContextMenu_submit"
-                disabled={!this.state.message} onClick={this._onSubmit}
+            actionButton = <AccessibleButton
+                className="mx_StatusMessageContextMenu_submit"
+                disabled={!this.state.message}
+                onClick={this._onSubmit}
             >
                 <span>{ _t("Set status") }</span>
             </AccessibleButton>;
@@ -121,12 +123,19 @@ export default class StatusMessageContextMenu extends React.Component {
             spinner = <Spinner w="24" h="24" />;
         }
 
-        const form = <form className="mx_StatusMessageContextMenu_form"
-            autoComplete="off" onSubmit={this._onSubmit}
+        const form = <form
+            className="mx_StatusMessageContextMenu_form"
+            autoComplete="off"
+            onSubmit={this._onSubmit}
         >
-            <input type="text" className="mx_StatusMessageContextMenu_message"
-                key="message" placeholder={_t("Set a new status...")}
-                autoFocus={true} maxLength="60" value={this.state.message}
+            <input
+                type="text"
+                className="mx_StatusMessageContextMenu_message"
+                key="message"
+                placeholder={_t("Set a new status...")}
+                autoFocus={true}
+                maxLength="60"
+                value={this.state.message}
                 onChange={this._onStatusChange}
             />
             <div className="mx_StatusMessageContextMenu_actionContainer">

src/components/views/context_menus/TagTileContextMenu.js

@@ -24,6 +24,8 @@ import { MenuItem } from "../../structures/ContextMenu";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import GroupFilterOrderStore from "../../../stores/GroupFilterOrderStore";
+import { createSpaceFromCommunity } from "../../../utils/space";
+import GroupStore from "../../../stores/GroupStore";
 
 @replaceableComponent("views.context_menus.TagTileContextMenu")
 export default class TagTileContextMenu extends React.Component {
@@ -49,6 +51,11 @@ export default class TagTileContextMenu extends React.Component {
         this.props.onFinished();
     };
 
+    _onCreateSpaceClick = () => {
+        createSpaceFromCommunity(this.context, this.props.tag);
+        this.props.onFinished();
+    };
+
     _onMoveUp = () => {
         dis.dispatch(TagOrderActions.moveTag(this.context, this.props.tag, this.props.index - 1));
         this.props.onFinished();
@@ -77,6 +84,16 @@ export default class TagTileContextMenu extends React.Component {
             );
         }
 
+        let createSpaceOption;
+        if (GroupStore.isUserPrivileged(this.props.tag)) {
+            createSpaceOption = <>
+                <hr className="mx_TagTileContextMenu_separator" role="separator" />
+                <MenuItem className="mx_TagTileContextMenu_item mx_TagTileContextMenu_createSpace" onClick={this._onCreateSpaceClick}>
+                    { _t("Create Space") }
+                </MenuItem>
+            </>;
+        }
+
         return <div>
             <MenuItem className="mx_TagTileContextMenu_item mx_TagTileContextMenu_viewCommunity" onClick={this._onViewCommunityClick}>
                 { _t('View Community') }
@@ -88,6 +105,7 @@ export default class TagTileContextMenu extends React.Component {
             <MenuItem className="mx_TagTileContextMenu_item mx_TagTileContextMenu_hideCommunity" onClick={this._onRemoveClick}>
                 { _t("Unpin") }
             </MenuItem>
+            { createSpaceOption }
         </div>;
     }
 }

src/components/views/context_menus/WidgetContextMenu.tsx

@@ -76,7 +76,8 @@ const WidgetContextMenu: React.FC<IProps> = ({
             onFinished();
         };
         streamAudioStreamButton = <IconizedContextMenuOption
-            onClick={onStreamAudioClick} label={_t("Start audio stream")}
+            onClick={onStreamAudioClick}
+            label={_t("Start audio stream")}
         />;
     }
 

src/components/views/dialogs/AddExistingSubspaceDialog.tsx

@@ -0,0 +1,67 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useState } from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+
+import { _t } from '../../../languageHandler';
+import BaseDialog from "./BaseDialog";
+import AccessibleButton from "../elements/AccessibleButton";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import { AddExistingToSpace, defaultSpacesRenderer, SubspaceSelector } from "./AddExistingToSpaceDialog";
+
+interface IProps {
+    space: Room;
+    onCreateSubspaceClick(): void;
+    onFinished(added?: boolean): void;
+}
+
+const AddExistingSubspaceDialog: React.FC<IProps> = ({ space, onCreateSubspaceClick, onFinished }) => {
+    const [selectedSpace, setSelectedSpace] = useState(space);
+
+    return <BaseDialog
+        title={(
+            <SubspaceSelector
+                title={_t("Add existing space")}
+                space={space}
+                value={selectedSpace}
+                onChange={setSelectedSpace}
+            />
+        )}
+        className="mx_AddExistingToSpaceDialog"
+        contentId="mx_AddExistingToSpace"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        <MatrixClientContext.Provider value={space.client}>
+            <AddExistingToSpace
+                space={space}
+                onFinished={onFinished}
+                footerPrompt={<>
+                    <div>{ _t("Want to add a new space instead?") }</div>
+                    <AccessibleButton onClick={onCreateSubspaceClick} kind="link">
+                        { _t("Create a new space") }
+                    </AccessibleButton>
+                </>}
+                filterPlaceholder={_t("Search for spaces")}
+                spacesRenderer={defaultSpacesRenderer}
+            />
+        </MatrixClientContext.Provider>
+    </BaseDialog>;
+};
+
+export default AddExistingSubspaceDialog;
+

src/components/views/dialogs/AddExistingToSpaceDialog.tsx

@@ -17,11 +17,10 @@ limitations under the License.
 import React, { ReactNode, useContext, useMemo, useState } from "react";
 import classNames from "classnames";
 import { Room } from "matrix-js-sdk/src/models/room";
-import { MatrixClient } from "matrix-js-sdk/src/client";
 import { sleep } from "matrix-js-sdk/src/utils";
+import { EventType } from "matrix-js-sdk/src/@types/event";
 
 import { _t } from '../../../languageHandler';
-import { IDialogProps } from "./IDialogProps";
 import BaseDialog from "./BaseDialog";
 import Dropdown from "../elements/Dropdown";
 import SearchBox from "../../structures/SearchBox";
@@ -36,20 +35,20 @@ import StyledCheckbox from "../elements/StyledCheckbox";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import { sortRooms } from "../../../stores/room-list/algorithms/tag-sorting/RecentAlgorithm";
 import ProgressBar from "../elements/ProgressBar";
-import { SpaceFeedbackPrompt } from "../../structures/SpaceRoomView";
 import DecoratedRoomAvatar from "../avatars/DecoratedRoomAvatar";
 import QueryMatcher from "../../../autocomplete/QueryMatcher";
 import TruncatedList from "../elements/TruncatedList";
 import EntityTile from "../rooms/EntityTile";
 import BaseAvatar from "../avatars/BaseAvatar";
 
-interface IProps extends IDialogProps {
-    matrixClient: MatrixClient;
+interface IProps {
     space: Room;
-    onCreateRoomClick(cli: MatrixClient, space: Room): void;
+    onCreateRoomClick(): void;
+    onAddSubspaceClick(): void;
+    onFinished(added?: boolean): void;
 }
 
-const Entry = ({ room, checked, onChange }) => {
+export const Entry = ({ room, checked, onChange }) => {
     return <label className="mx_AddExistingToSpace_entry">
         { room?.isSpaceRoom()
             ? <RoomAvatar room={room} height={32} width={32} />
@@ -67,14 +66,36 @@ const Entry = ({ room, checked, onChange }) => {
 interface IAddExistingToSpaceProps {
     space: Room;
     footerPrompt?: ReactNode;
+    filterPlaceholder: string;
     emptySelectionButton?: ReactNode;
     onFinished(added: boolean): void;
+    roomsRenderer?(
+        rooms: Room[],
+        selectedToAdd: Set<Room>,
+        onChange: undefined | ((checked: boolean, room: Room) => void),
+        truncateAt: number,
+        overflowTile: (overflowCount: number, totalCount: number) => JSX.Element,
+    ): ReactNode;
+    spacesRenderer?(
+        spaces: Room[],
+        selectedToAdd: Set<Room>,
+        onChange?: (checked: boolean, room: Room) => void,
+    ): ReactNode;
+    dmsRenderer?(
+        dms: Room[],
+        selectedToAdd: Set<Room>,
+        onChange?: (checked: boolean, room: Room) => void,
+    ): ReactNode;
 }
 
 export const AddExistingToSpace: React.FC<IAddExistingToSpaceProps> = ({
     space,
     footerPrompt,
     emptySelectionButton,
+    filterPlaceholder,
+    roomsRenderer,
+    dmsRenderer,
+    spacesRenderer,
     onFinished,
 }) => {
     const cli = useContext(MatrixClientContext);
@@ -198,7 +219,7 @@ export const AddExistingToSpace: React.FC<IAddExistingToSpaceProps> = ({
         </>;
     }
 
-    const onChange = !busy && !error ? (checked, room) => {
+    const onChange = !busy && !error ? (checked: boolean, room: Room) => {
         if (checked) {
             selectedToAdd.add(room);
         } else {
@@ -208,83 +229,52 @@ export const AddExistingToSpace: React.FC<IAddExistingToSpaceProps> = ({
     } : null;
 
     const [truncateAt, setTruncateAt] = useState(20);
-    function overflowTile(overflowCount, totalCount) {
+    function overflowTile(overflowCount: number, totalCount: number): JSX.Element {
         const text = _t("and %(count)s others...", { count: overflowCount });
         return (
-            <EntityTile className="mx_EntityTile_ellipsis" avatarJsx={
-                <BaseAvatar url={require("../../../../res/img/ellipsis.svg")} name="..." width={36} height={36} />
-            } name={text} presenceState="online" suppressOnHover={true}
-            onClick={() => setTruncateAt(totalCount)} />
+            <EntityTile
+                className="mx_EntityTile_ellipsis"
+                avatarJsx={
+                    <BaseAvatar url={require("../../../../res/img/ellipsis.svg")} name="..." width={36} height={36} />
+                }
+                name={text}
+                presenceState="online"
+                suppressOnHover={true}
+                onClick={() => setTruncateAt(totalCount)}
+            />
         );
     }
 
+    let noResults = true;
+    if ((roomsRenderer && rooms.length > 0) ||
+        (dmsRenderer && dms.length > 0) ||
+        (!roomsRenderer && !dmsRenderer && spacesRenderer && spaces.length > 0) // only count spaces when alone
+    ) {
+        noResults = false;
+    }
+
     return <div className="mx_AddExistingToSpace">
         <SearchBox
             className="mx_textinput_icon mx_textinput_search"
-            placeholder={_t("Filter your rooms and spaces")}
+            placeholder={filterPlaceholder}
             onSearch={setQuery}
             autoComplete={true}
             autoFocus={true}
         />
         <AutoHideScrollbar className="mx_AddExistingToSpace_content">
-            { rooms.length > 0 ? (
-                <div className="mx_AddExistingToSpace_section">
-                    <h3>{ _t("Rooms") }</h3>
-                    <TruncatedList
-                        truncateAt={truncateAt}
-                        createOverflowElement={overflowTile}
-                        getChildren={(start, end) => rooms.slice(start, end).map(room =>
-                            <Entry
-                                key={room.roomId}
-                                room={room}
-                                checked={selectedToAdd.has(room)}
-                                onChange={onChange ? (checked) => {
-                                    onChange(checked, room);
-                                } : null}
-                            />,
-                        )}
-                        getChildCount={() => rooms.length}
-                    />
-                </div>
+            { rooms.length > 0 && roomsRenderer ? (
+                roomsRenderer(rooms, selectedToAdd, onChange, truncateAt, overflowTile)
             ) : undefined }
 
-            { spaces.length > 0 ? (
-                <div className="mx_AddExistingToSpace_section mx_AddExistingToSpace_section_spaces">
-                    <h3>{ _t("Spaces") }</h3>
-                    <div className="mx_AddExistingToSpace_section_experimental">
-                        <div>{ _t("Feeling experimental?") }</div>
-                        <div>{ _t("You can add existing spaces to a space.") }</div>
-                    </div>
-                    { spaces.map(space => {
-                        return <Entry
-                            key={space.roomId}
-                            room={space}
-                            checked={selectedToAdd.has(space)}
-                            onChange={onChange ? (checked) => {
-                                onChange(checked, space);
-                            } : null}
-                        />;
-                    }) }
-                </div>
+            { spaces.length > 0 && spacesRenderer ? (
+                spacesRenderer(spaces, selectedToAdd, onChange)
             ) : null }
 
-            { dms.length > 0 ? (
-                <div className="mx_AddExistingToSpace_section">
-                    <h3>{ _t("Direct Messages") }</h3>
-                    { dms.map(room => {
-                        return <Entry
-                            key={room.roomId}
-                            room={room}
-                            checked={selectedToAdd.has(room)}
-                            onChange={onChange ? (checked) => {
-                                onChange(checked, room);
-                            } : null}
-                        />;
-                    }) }
-                </div>
+            { dms.length > 0 && dmsRenderer ? (
+                dmsRenderer(dms, selectedToAdd, onChange)
             ) : null }
 
-            { spaces.length + rooms.length + dms.length < 1 ? <span className="mx_AddExistingToSpace_noResults">
+            { noResults ? <span className="mx_AddExistingToSpace_noResults">
                 { _t("No results") }
             </span> : undefined }
         </AutoHideScrollbar>
@@ -295,69 +285,166 @@ export const AddExistingToSpace: React.FC<IAddExistingToSpaceProps> = ({
     </div>;
 };
 
-const AddExistingToSpaceDialog: React.FC<IProps> = ({ matrixClient: cli, space, onCreateRoomClick, onFinished }) => {
-    const [selectedSpace, setSelectedSpace] = useState(space);
-    const existingSubspaces = SpaceStore.instance.getChildSpaces(space.roomId);
+export const defaultRoomsRenderer: IAddExistingToSpaceProps["roomsRenderer"] = (
+    rooms, selectedToAdd, onChange, truncateAt, overflowTile,
+) => (
+    <div className="mx_AddExistingToSpace_section">
+        <h3>{ _t("Rooms") }</h3>
+        <TruncatedList
+            truncateAt={truncateAt}
+            createOverflowElement={overflowTile}
+            getChildren={(start, end) => rooms.slice(start, end).map(room =>
+                <Entry
+                    key={room.roomId}
+                    room={room}
+                    checked={selectedToAdd.has(room)}
+                    onChange={onChange ? (checked: boolean) => {
+                        onChange(checked, room);
+                    } : null}
+                />,
+            )}
+            getChildCount={() => rooms.length}
+        />
+    </div>
+);
 
-    let spaceOptionSection;
-    if (existingSubspaces.length > 0) {
-        const options = [space, ...existingSubspaces].map((space) => {
-            const classes = classNames("mx_AddExistingToSpaceDialog_dropdownOption", {
-                mx_AddExistingToSpaceDialog_dropdownOptionActive: space === selectedSpace,
-            });
-            return <div key={space.roomId} className={classes}>
-                <RoomAvatar room={space} width={24} height={24} />
-                { space.name || getDisplayAliasForRoom(space) || space.roomId }
-            </div>;
-        });
+export const defaultSpacesRenderer: IAddExistingToSpaceProps["spacesRenderer"] = (spaces, selectedToAdd, onChange) => (
+    <div className="mx_AddExistingToSpace_section">
+        { spaces.map(space => {
+            return <Entry
+                key={space.roomId}
+                room={space}
+                checked={selectedToAdd.has(space)}
+                onChange={onChange ? (checked) => {
+                    onChange(checked, space);
+                } : null}
+            />;
+        }) }
+    </div>
+);
 
-        spaceOptionSection = (
+export const defaultDmsRenderer: IAddExistingToSpaceProps["dmsRenderer"] = (dms, selectedToAdd, onChange) => (
+    <div className="mx_AddExistingToSpace_section">
+        <h3>{ _t("Direct Messages") }</h3>
+        { dms.map(room => {
+            return <Entry
+                key={room.roomId}
+                room={room}
+                checked={selectedToAdd.has(room)}
+                onChange={onChange ? (checked: boolean) => {
+                    onChange(checked, room);
+                } : null}
+            />;
+        }) }
+    </div>
+);
+
+interface ISubspaceSelectorProps {
+    title: string;
+    space: Room;
+    value: Room;
+    onChange(space: Room): void;
+}
+
+export const SubspaceSelector = ({ title, space, value, onChange }: ISubspaceSelectorProps) => {
+    const options = useMemo(() => {
+        return [space, ...SpaceStore.instance.getChildSpaces(space.roomId).filter(space => {
+            return space.currentState.maySendStateEvent(EventType.SpaceChild, space.client.credentials.userId);
+        })];
+    }, [space]);
+
+    let body;
+    if (options.length > 1) {
+        body = (
             <Dropdown
                 id="mx_SpaceSelectDropdown"
+                className="mx_SpaceSelectDropdown"
                 onOptionChange={(key: string) => {
-                    setSelectedSpace(existingSubspaces.find(space => space.roomId === key) || space);
+                    onChange(options.find(space => space.roomId === key) || space);
                 }}
-                value={selectedSpace.roomId}
+                value={value.roomId}
                 label={_t("Space selection")}
             >
-                { options }
+                { options.map((space) => {
+                    const classes = classNames({
+                        mx_SubspaceSelector_dropdownOptionActive: space === value,
+                    });
+                    return <div key={space.roomId} className={classes}>
+                        <RoomAvatar room={space} width={24} height={24} />
+                        { space.name || getDisplayAliasForRoom(space) || space.roomId }
+                    </div>;
+                }) }
             </Dropdown>
         );
     } else {
-        spaceOptionSection = <div className="mx_AddExistingToSpaceDialog_onlySpace">
-            { space.name || getDisplayAliasForRoom(space) || space.roomId }
-        </div>;
+        body = (
+            <div className="mx_SubspaceSelector_onlySpace">
+                { space.name || getDisplayAliasForRoom(space) || space.roomId }
+            </div>
+        );
     }
 
-    const title = <React.Fragment>
-        <RoomAvatar room={selectedSpace} height={40} width={40} />
+    return <div className="mx_SubspaceSelector">
+        <RoomAvatar room={value} height={40} width={40} />
         <div>
-            <h1>{ _t("Add existing rooms") }</h1>
-            { spaceOptionSection }
+            <h1>{ title }</h1>
+            { body }
         </div>
-    </React.Fragment>;
+    </div>;
+};
+
+const AddExistingToSpaceDialog: React.FC<IProps> = ({ space, onCreateRoomClick, onAddSubspaceClick, onFinished }) => {
+    const [selectedSpace, setSelectedSpace] = useState(space);
 
     return <BaseDialog
-        title={title}
+        title={(
+            <SubspaceSelector
+                title={_t("Add existing rooms")}
+                space={space}
+                value={selectedSpace}
+                onChange={setSelectedSpace}
+            />
+        )}
         className="mx_AddExistingToSpaceDialog"
         contentId="mx_AddExistingToSpace"
         onFinished={onFinished}
         fixedWidth={false}
     >
-        <MatrixClientContext.Provider value={cli}>
+        <MatrixClientContext.Provider value={space.client}>
             <AddExistingToSpace
                 space={space}
                 onFinished={onFinished}
                 footerPrompt={<>
                     <div>{ _t("Want to add a new room instead?") }</div>
-                    <AccessibleButton onClick={() => onCreateRoomClick(cli, space)} kind="link">
+                    <AccessibleButton
+                        kind="link"
+                        onClick={() => {
+                            onCreateRoomClick();
+                            onFinished();
+                        }}
+                    >
                         { _t("Create a new room") }
                     </AccessibleButton>
                 </>}
+                filterPlaceholder={_t("Search for rooms")}
+                roomsRenderer={defaultRoomsRenderer}
+                spacesRenderer={() => (
+                    <div className="mx_AddExistingToSpace_section">
+                        <h3>{ _t("Spaces") }</h3>
+                        <AccessibleButton
+                            kind="link"
+                            onClick={() => {
+                                onAddSubspaceClick();
+                                onFinished();
+                            }}
+                        >
+                            { _t("Adding spaces has moved.") }
+                        </AccessibleButton>
+                    </div>
+                )}
+                dmsRenderer={defaultDmsRenderer}
             />
         </MatrixClientContext.Provider>
-
-        <SpaceFeedbackPrompt onClick={() => onFinished(false)} />
     </BaseDialog>;
 };
 

src/components/views/dialogs/AddressPickerDialog.tsx

@@ -665,8 +665,8 @@ export default class AddressPickerDialog extends React.Component<IProps, IState>
                 onChange={this.onQueryChanged}
                 placeholder={this.getPlaceholder()}
                 defaultValue={this.props.value}
-                autoFocus={this.props.focus}>
-            </textarea>,
+                autoFocus={this.props.focus}
+            />,
         );
 
         const filteredSuggestedList = this.getFilteredSuggestions();
@@ -727,8 +727,12 @@ export default class AddressPickerDialog extends React.Component<IProps, IState>
         }
 
         return (
-            <BaseDialog className="mx_AddressPickerDialog" onKeyDown={this.onKeyDown}
-                onFinished={this.props.onFinished} title={this.props.title}>
+            <BaseDialog
+                className="mx_AddressPickerDialog"
+                onKeyDown={this.onKeyDown}
+                onFinished={this.props.onFinished}
+                title={this.props.title}
+            >
                 { inputLabel }
                 <div className="mx_Dialog_content">
                     <div className="mx_AddressPickerDialog_inputContainer">{ query }</div>

src/components/views/dialogs/BaseDialog.js

@@ -118,9 +118,7 @@ export default class BaseDialog extends React.Component {
 
         let headerImage;
         if (this.props.headerImage) {
-            headerImage = <img className="mx_Dialog_titleImage" src={this.props.headerImage}
-                alt=""
-            />;
+            headerImage = <img className="mx_Dialog_titleImage" src={this.props.headerImage} alt="" />;
         }
 
         return (

src/components/views/dialogs/BetaFeedbackDialog.tsx

@@ -14,22 +14,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { useState } from "react";
+import React from "react";
 
-import QuestionDialog from './QuestionDialog';
 import { _t } from '../../../languageHandler';
-import Field from "../elements/Field";
-import SdkConfig from "../../../SdkConfig";
 import { IDialogProps } from "./IDialogProps";
 import SettingsStore from "../../../settings/SettingsStore";
-import { submitFeedback } from "../../../rageshake/submit-rageshake";
-import StyledCheckbox from "../elements/StyledCheckbox";
-import Modal from "../../../Modal";
-import InfoDialog from "./InfoDialog";
 import AccessibleButton from "../elements/AccessibleButton";
 import defaultDispatcher from "../../../dispatcher/dispatcher";
 import { Action } from "../../../dispatcher/actions";
 import { UserTab } from "./UserSettingsDialog";
+import GenericFeatureFeedbackDialog from "./GenericFeatureFeedbackDialog";
+
+// XXX: Keep this around for re-use in future Betas
 
 interface IProps extends IDialogProps {
     featureId: string;
@@ -38,74 +34,28 @@ interface IProps extends IDialogProps {
 const BetaFeedbackDialog: React.FC<IProps> = ({ featureId, onFinished }) => {
     const info = SettingsStore.getBetaInfo(featureId);
 
-    const [comment, setComment] = useState("");
-    const [canContact, setCanContact] = useState(false);
-
-    const sendFeedback = async (ok: boolean) => {
-        if (!ok) return onFinished(false);
-
-        const extraData = SettingsStore.getBetaInfo(featureId)?.extraSettings.reduce((o, k) => {
-            o[k] = SettingsStore.getValue(k);
-            return o;
-        }, {});
-
-        submitFeedback(SdkConfig.get().bug_report_endpoint_url, info.feedbackLabel, comment, canContact, extraData);
-        onFinished(true);
-
-        Modal.createTrackedDialog("Beta Dialog Sent", featureId, InfoDialog, {
-            title: _t("Beta feedback"),
-            description: _t("Thank you for your feedback, we really appreciate it."),
-            button: _t("Done"),
-            hasCloseButton: false,
-            fixedWidth: false,
-        });
-    };
-
-    return (<QuestionDialog
-        className="mx_BetaFeedbackDialog"
-        hasCancelButton={true}
+    return <GenericFeatureFeedbackDialog
         title={_t("%(featureName)s beta feedback", { featureName: info.title })}
-        description={<React.Fragment>
-            <div className="mx_BetaFeedbackDialog_subheading">
-                { _t(info.feedbackSubheading) }
-                &nbsp;
-                { _t("Your platform and username will be noted to help us use your feedback as much as we can.") }
-
-                <AccessibleButton kind="link" onClick={() => {
-                    onFinished(false);
-                    defaultDispatcher.dispatch({
-                        action: Action.ViewUserSettings,
-                        initialTabId: UserTab.Labs,
-                    });
-                }}>
-                    { _t("To leave the beta, visit your settings.") }
-                </AccessibleButton>
-            </div>
-
-            <Field
-                id="feedbackComment"
-                label={_t("Feedback")}
-                type="text"
-                autoComplete="off"
-                value={comment}
-                element="textarea"
-                onChange={(ev) => {
-                    setComment(ev.target.value);
-                }}
-                autoFocus={true}
-            />
-
-            <StyledCheckbox
-                checked={canContact}
-                onClick={e => setCanContact((e.target as HTMLInputElement).checked)}
-            >
-                { _t("You may contact me if you have any follow up questions") }
-            </StyledCheckbox>
-        </React.Fragment>}
-        button={_t("Send feedback")}
-        buttonDisabled={!comment}
-        onFinished={sendFeedback}
-    />);
+        subheading={_t(info.feedbackSubheading)}
+        onFinished={onFinished}
+        rageshakeLabel={info.feedbackLabel}
+        rageshakeData={Object.fromEntries((SettingsStore.getBetaInfo(featureId)?.extraSettings || []).map(k => {
+            return SettingsStore.getValue(k);
+        }))}
+    >
+        <AccessibleButton
+            kind="link"
+            onClick={() => {
+                onFinished(false);
+                defaultDispatcher.dispatch({
+                    action: Action.ViewUserSettings,
+                    initialTabId: UserTab.Labs,
+                });
+            }}
+        >
+            { _t("To leave the beta, visit your settings.") }
+        </AccessibleButton>
+    </GenericFeatureFeedbackDialog>;
 };
 
 export default BetaFeedbackDialog;

src/components/views/dialogs/BugReportDialog.tsx

@@ -29,11 +29,13 @@ import BaseDialog from "./BaseDialog";
 import Field from '../elements/Field';
 import Spinner from "../elements/Spinner";
 import DialogButtons from "../elements/DialogButtons";
+import { sendSentryReport } from "../../../sentry";
 
 interface IProps {
     onFinished: (success: boolean) => void;
     initialText?: string;
     label?: string;
+    error?: Error;
 }
 
 interface IState {
@@ -113,6 +115,8 @@ export default class BugReportDialog extends React.Component<IProps, IState> {
                 });
             }
         });
+
+        sendSentryReport(this.state.text, this.state.issueUrl, this.props.error);
     };
 
     private onDownload = async (): Promise<void> => {
@@ -188,7 +192,9 @@ export default class BugReportDialog extends React.Component<IProps, IState> {
         }
 
         return (
-            <BaseDialog className="mx_BugReportDialog" onFinished={this.onCancel}
+            <BaseDialog
+                className="mx_BugReportDialog"
+                onFinished={this.onCancel}
                 title={_t('Submit debug logs')}
                 contentId='mx_Dialog_content'
             >
@@ -198,8 +204,8 @@ export default class BugReportDialog extends React.Component<IProps, IState> {
                         { _t(
                             "Debug logs contain application usage data including your " +
                             "username, the IDs or aliases of the rooms or groups you " +
-                            "have visited and the usernames of other users. They do " +
-                            "not contain messages.",
+                            "have visited, which UI elements you last interacted with, " +
+                            "and the usernames of other users. They do not contain messages.",
                         ) }
                     </p>
                     <p><b>
@@ -209,7 +215,7 @@ export default class BugReportDialog extends React.Component<IProps, IState> {
                             {
                                 a: (sub) => <a
                                     target="_blank"
-                                    href="https://github.com/vector-im/element-web/issues/new"
+                                    href="https://github.com/vector-im/element-web/issues/new/choose"
                                 >
                                     { sub }
                                 </a>,

src/components/views/dialogs/CommunityPrototypeInviteDialog.tsx

@@ -205,9 +205,12 @@ export default class CommunityPrototypeInviteDialog extends React.PureComponent<
                 people.push((
                     <AccessibleButton
                         onClick={this.onShowMorePeople}
-                        kind="link" key="more"
+                        kind="link"
+                        key="more"
                         className="mx_CommunityPrototypeInviteDialog_morePeople"
-                    >{ _t("Show more") }</AccessibleButton>
+                    >
+                        { _t("Show more") }
+                    </AccessibleButton>
                 ));
             }
         }
@@ -240,10 +243,13 @@ export default class CommunityPrototypeInviteDialog extends React.PureComponent<
                         { peopleIntro }
                         { people }
                         <AccessibleButton
-                            kind="primary" onClick={this.onSubmit}
+                            kind="primary"
+                            onClick={this.onSubmit}
                             disabled={this.state.busy}
                             className="mx_CommunityPrototypeInviteDialog_primaryButton"
-                        >{ buttonText }</AccessibleButton>
+                        >
+                            { buttonText }
+                        </AccessibleButton>
                     </div>
                 </form>
             </BaseDialog>

src/components/views/dialogs/ConfirmRedactDialog.tsx

@@ -37,8 +37,8 @@ export default class ConfirmRedactDialog extends React.Component<IProps> {
                        "Note that if you delete a room name or topic change, it could undo the change.")}
                 placeholder={_t("Reason (optional)")}
                 focus
-                button={_t("Remove")}>
-            </TextInputDialog>
+                button={_t("Remove")}
+            />
         );
     }
 }

src/components/views/dialogs/ConfirmUserActionDialog.tsx

@@ -104,7 +104,9 @@ export default class ConfirmUserActionDialog extends React.Component<IProps> {
         }
 
         return (
-            <BaseDialog className="mx_ConfirmUserActionDialog" onFinished={this.props.onFinished}
+            <BaseDialog
+                className="mx_ConfirmUserActionDialog"
+                onFinished={this.props.onFinished}
                 title={this.props.title}
                 contentId='mx_Dialog_content'
             >

src/components/views/dialogs/CreateCommunityPrototypeDialog.tsx

@@ -204,8 +204,10 @@ export default class CreateCommunityPrototypeDialog extends React.PureComponent<
                         </div>
                         <div className="mx_CreateCommunityPrototypeDialog_colAvatar">
                             <input
-                                type="file" style={{ display: "none" }}
-                                ref={this.avatarUploadRef} accept="image/*"
+                                type="file"
+                                style={{ display: "none" }}
+                                ref={this.avatarUploadRef}
+                                accept="image/*"
                                 onChange={this.onAvatarChanged}
                             />
                             <AccessibleButton

src/components/views/dialogs/CreateGroupDialog.tsx

@@ -123,7 +123,9 @@ export default class CreateGroupDialog extends React.Component<IProps, IState> {
         }
 
         return (
-            <BaseDialog className="mx_CreateGroupDialog" onFinished={this.props.onFinished}
+            <BaseDialog
+                className="mx_CreateGroupDialog"
+                onFinished={this.props.onFinished}
                 title={_t('Create Community')}
             >
                 <form onSubmit={this.onFormSubmit}>
@@ -133,8 +135,11 @@ export default class CreateGroupDialog extends React.Component<IProps, IState> {
                                 <label htmlFor="groupname">{ _t('Community Name') }</label>
                             </div>
                             <div>
-                                <input id="groupname" className="mx_CreateGroupDialog_input"
-                                    autoFocus={true} size={64}
+                                <input
+                                    id="groupname"
+                                    className="mx_CreateGroupDialog_input"
+                                    autoFocus={true}
+                                    size={64}
                                     placeholder={_t('Example')}
                                     onChange={this.onGroupNameChange}
                                     value={this.state.groupName}

src/components/views/dialogs/CreateRoomDialog.tsx

@@ -17,6 +17,7 @@ limitations under the License.
 
 import React, { ChangeEvent, createRef, KeyboardEvent, SyntheticEvent } from "react";
 import { Room } from "matrix-js-sdk/src/models/room";
+import { JoinRule, Preset, Visibility } from "matrix-js-sdk/src/@types/partials";
 
 import SdkConfig from '../../../SdkConfig';
 import withValidation, { IFieldState } from '../elements/Validation';
@@ -31,16 +32,19 @@ import RoomAliasField from "../elements/RoomAliasField";
 import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
 import DialogButtons from "../elements/DialogButtons";
 import BaseDialog from "../dialogs/BaseDialog";
-import { Preset, Visibility } from "matrix-js-sdk/src/@types/partials";
+import SpaceStore from "../../../stores/SpaceStore";
+import JoinRuleDropdown from "../elements/JoinRuleDropdown";
 
 interface IProps {
     defaultPublic?: boolean;
     defaultName?: string;
     parentSpace?: Room;
+    defaultEncrypted?: boolean;
     onFinished(proceed: boolean, opts?: IOpts): void;
 }
 
 interface IState {
+    joinRule: JoinRule;
     isPublic: boolean;
     isEncrypted: boolean;
     name: string;
@@ -54,16 +58,27 @@ interface IState {
 
 @replaceableComponent("views.dialogs.CreateRoomDialog")
 export default class CreateRoomDialog extends React.Component<IProps, IState> {
+    private readonly supportsRestricted: boolean;
     private nameField = createRef<Field>();
     private aliasField = createRef<RoomAliasField>();
 
     constructor(props) {
         super(props);
 
+        this.supportsRestricted = this.props.parentSpace && !!SpaceStore.instance.restrictedJoinRuleSupport?.preferred;
+
+        let joinRule = JoinRule.Invite;
+        if (this.props.defaultPublic) {
+            joinRule = JoinRule.Public;
+        } else if (this.supportsRestricted) {
+            joinRule = JoinRule.Restricted;
+        }
+
         const config = SdkConfig.get();
         this.state = {
             isPublic: this.props.defaultPublic || false,
-            isEncrypted: privateShouldBeEncrypted(),
+            isEncrypted: this.props.defaultEncrypted ?? privateShouldBeEncrypted(),
+            joinRule,
             name: this.props.defaultName || "",
             topic: "",
             alias: "",
@@ -81,13 +96,18 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
         const opts: IOpts = {};
         const createOpts: IOpts["createOpts"] = opts.createOpts = {};
         createOpts.name = this.state.name;
-        if (this.state.isPublic) {
+
+        if (this.state.joinRule === JoinRule.Public) {
             createOpts.visibility = Visibility.Public;
             createOpts.preset = Preset.PublicChat;
             opts.guestAccess = false;
             const { alias } = this.state;
             createOpts.room_alias_name = alias.substr(1, alias.indexOf(":") - 1);
+        } else {
+            // If we cannot change encryption we pass `true` for safety, the server should automatically do this for us.
+            opts.encryption = this.state.canChangeEncryption ? this.state.isEncrypted : true;
         }
+
         if (this.state.topic) {
             createOpts.topic = this.state.topic;
         }
@@ -95,22 +115,13 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
             createOpts.creation_content = { 'm.federate': false };
         }
 
-        if (!this.state.isPublic) {
-            if (this.state.canChangeEncryption) {
-                opts.encryption = this.state.isEncrypted;
-            } else {
-                // the server should automatically do this for us, but for safety
-                // we'll demand it too.
-                opts.encryption = true;
-            }
-        }
-
         if (CommunityPrototypeStore.instance.getSelectedCommunityId()) {
             opts.associatedWithCommunity = CommunityPrototypeStore.instance.getSelectedCommunityId();
         }
 
-        if (this.props.parentSpace) {
-            opts.parentSpace = this.props.parentSpace;
+        opts.parentSpace = this.props.parentSpace;
+        if (this.props.parentSpace && this.state.joinRule === JoinRule.Restricted) {
+            opts.joinRule = JoinRule.Restricted;
         }
 
         return opts;
@@ -172,8 +183,8 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
         this.setState({ topic: ev.target.value });
     };
 
-    private onPublicChange = (isPublic: boolean) => {
-        this.setState({ isPublic });
+    private onJoinRuleChange = (joinRule: JoinRule) => {
+        this.setState({ joinRule });
     };
 
     private onEncryptedChange = (isEncrypted: boolean) => {
@@ -210,7 +221,7 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
 
     render() {
         let aliasField;
-        if (this.state.isPublic) {
+        if (this.state.joinRule === JoinRule.Public) {
             const domain = MatrixClientPeg.get().getDomain();
             aliasField = (
                 <div className="mx_CreateRoomDialog_aliasContainer">
@@ -224,19 +235,52 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
             );
         }
 
-        let publicPrivateLabel = <p>{ _t(
-            "Private rooms can be found and joined by invitation only. Public rooms can be " +
-            "found and joined by anyone.",
-        ) }</p>;
+        let publicPrivateLabel: JSX.Element;
         if (CommunityPrototypeStore.instance.getSelectedCommunityId()) {
-            publicPrivateLabel = <p>{ _t(
-                "Private rooms can be found and joined by invitation only. Public rooms can be " +
-                "found and joined by anyone in this community.",
-            ) }</p>;
+            publicPrivateLabel = <p>
+                { _t(
+                    "Private rooms can be found and joined by invitation only. Public rooms can be " +
+                    "found and joined by anyone in this community.",
+                ) }
+            </p>;
+        } else if (this.state.joinRule === JoinRule.Restricted) {
+            publicPrivateLabel = <p>
+                { _t(
+                    "Everyone in <SpaceName/> will be able to find and join this room.", {}, {
+                        SpaceName: () => <b>{ this.props.parentSpace.name }</b>,
+                    },
+                ) }
+                &nbsp;
+                { _t("You can change this at any time from room settings.") }
+            </p>;
+        } else if (this.state.joinRule === JoinRule.Public && this.props.parentSpace) {
+            publicPrivateLabel = <p>
+                { _t(
+                    "Anyone will be able to find and join this room, not just members of <SpaceName/>.", {}, {
+                        SpaceName: () => <b>{ this.props.parentSpace.name }</b>,
+                    },
+                ) }
+                &nbsp;
+                { _t("You can change this at any time from room settings.") }
+            </p>;
+        } else if (this.state.joinRule === JoinRule.Public) {
+            publicPrivateLabel = <p>
+                { _t("Anyone will be able to find and join this room.") }
+                &nbsp;
+                { _t("You can change this at any time from room settings.") }
+            </p>;
+        } else if (this.state.joinRule === JoinRule.Invite) {
+            publicPrivateLabel = <p>
+                { _t(
+                    "Only people invited will be able to find and join this room.",
+                ) }
+                &nbsp;
+                { _t("You can change this at any time from room settings.") }
+            </p>;
         }
 
         let e2eeSection;
-        if (!this.state.isPublic) {
+        if (this.state.joinRule !== JoinRule.Public) {
             let microcopy;
             if (privateShouldBeEncrypted()) {
                 if (this.state.canChangeEncryption) {
@@ -273,15 +317,16 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
             );
         }
 
-        let title = this.state.isPublic ? _t('Create a public room') : _t('Create a private room');
+        let title = _t("Create a room");
         if (CommunityPrototypeStore.instance.getSelectedCommunityId()) {
             const name = CommunityPrototypeStore.instance.getSelectedCommunityName();
             title = _t("Create a room in %(communityName)s", { communityName: name });
+        } else if (!this.props.parentSpace) {
+            title = this.state.joinRule === JoinRule.Public ? _t('Create a public room') : _t('Create a private room');
         }
+
         return (
-            <BaseDialog className="mx_CreateRoomDialog" onFinished={this.props.onFinished}
-                title={title}
-            >
+            <BaseDialog className="mx_CreateRoomDialog" onFinished={this.props.onFinished} title={title}>
                 <form onSubmit={this.onOk} onKeyDown={this.onKeyDown}>
                     <div className="mx_Dialog_content">
                         <Field
@@ -298,11 +343,16 @@ export default class CreateRoomDialog extends React.Component<IProps, IState> {
                             value={this.state.topic}
                             className="mx_CreateRoomDialog_topic"
                         />
-                        <LabelledToggleSwitch
-                            label={_t("Make this room public")}
-                            onChange={this.onPublicChange}
-                            value={this.state.isPublic}
+
+                        <JoinRuleDropdown
+                            label={_t("Room visibility")}
+                            labelInvite={_t("Private room (invite only)")}
+                            labelPublic={_t("Public room")}
+                            labelRestricted={this.supportsRestricted ? _t("Visible to space members") : undefined}
+                            value={this.state.joinRule}
+                            onChange={this.onJoinRuleChange}
                         />
+
                         { publicPrivateLabel }
                         { e2eeSection }
                         { aliasField }

src/components/views/dialogs/CreateSpaceFromCommunityDialog.tsx

@@ -0,0 +1,340 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useEffect, useRef, useState } from "react";
+import { JoinRule } from "matrix-js-sdk/src/@types/partials";
+import { EventType } from "matrix-js-sdk/src/@types/event";
+import { MatrixClient } from "matrix-js-sdk/src/matrix";
+
+import { _t } from '../../../languageHandler';
+import BaseDialog from "./BaseDialog";
+import AccessibleButton from "../elements/AccessibleButton";
+import { createSpace, SpaceCreateForm } from "../spaces/SpaceCreateMenu";
+import JoinRuleDropdown from "../elements/JoinRuleDropdown";
+import Field from "../elements/Field";
+import RoomAliasField from "../elements/RoomAliasField";
+import { GroupMember } from "../right_panel/UserInfo";
+import { parseMembersResponse, parseRoomsResponse } from "../../../stores/GroupStore";
+import { calculateRoomVia, makeRoomPermalink } from "../../../utils/permalinks/Permalinks";
+import { useAsyncMemo } from "../../../hooks/useAsyncMemo";
+import Spinner from "../elements/Spinner";
+import { mediaFromMxc } from "../../../customisations/Media";
+import SpaceStore from "../../../stores/SpaceStore";
+import Modal from "../../../Modal";
+import InfoDialog from "./InfoDialog";
+import dis from "../../../dispatcher/dispatcher";
+import { Action } from "../../../dispatcher/actions";
+import { UserTab } from "./UserSettingsDialog";
+import TagOrderActions from "../../../actions/TagOrderActions";
+
+interface IProps {
+    matrixClient: MatrixClient;
+    groupId: string;
+    onFinished(spaceId?: string): void;
+}
+
+export const CreateEventField = "io.element.migrated_from_community";
+
+interface IGroupRoom {
+    displayname: string;
+    name?: string;
+    roomId: string;
+    canonicalAlias?: string;
+    avatarUrl?: string;
+    topic?: string;
+    numJoinedMembers?: number;
+    worldReadable?: boolean;
+    guestCanJoin?: boolean;
+    isPublic?: boolean;
+}
+
+/* eslint-disable camelcase */
+export interface IGroupSummary {
+    profile: {
+        avatar_url?: string;
+        is_openly_joinable?: boolean;
+        is_public?: boolean;
+        long_description: string;
+        name: string;
+        short_description: string;
+    };
+    rooms_section: {
+        rooms: unknown[];
+        categories: Record<string, unknown>;
+        total_room_count_estimate: number;
+    };
+    user: {
+        is_privileged: boolean;
+        is_public: boolean;
+        is_publicised: boolean;
+        membership: string;
+    };
+    users_section: {
+        users: unknown[];
+        roles: Record<string, unknown>;
+        total_user_count_estimate: number;
+    };
+}
+/* eslint-enable camelcase */
+
+const CreateSpaceFromCommunityDialog: React.FC<IProps> = ({ matrixClient: cli, groupId, onFinished }) => {
+    const [loading, setLoading] = useState(true);
+    const [error, setError] = useState<string>(null);
+    const [busy, setBusy] = useState(false);
+
+    const [avatar, setAvatar] = useState<File>(null); // undefined means to remove avatar
+    const [name, setName] = useState("");
+    const spaceNameField = useRef<Field>();
+    const [alias, setAlias] = useState("#" + groupId.substring(1, groupId.indexOf(":")) + ":" + cli.getDomain());
+    const spaceAliasField = useRef<RoomAliasField>();
+    const [topic, setTopic] = useState("");
+    const [joinRule, setJoinRule] = useState<JoinRule>(JoinRule.Public);
+
+    const groupSummary = useAsyncMemo<IGroupSummary>(() => cli.getGroupSummary(groupId), [groupId]);
+    useEffect(() => {
+        if (groupSummary) {
+            setName(groupSummary.profile.name || "");
+            setTopic(groupSummary.profile.short_description || "");
+            setJoinRule(groupSummary.profile.is_openly_joinable ? JoinRule.Public : JoinRule.Invite);
+            setLoading(false);
+        }
+    }, [groupSummary]);
+
+    if (loading) {
+        return <Spinner />;
+    }
+
+    const onCreateSpaceClick = async (e) => {
+        e.preventDefault();
+        if (busy) return;
+
+        setError(null);
+        setBusy(true);
+
+        // require & validate the space name field
+        if (!await spaceNameField.current.validate({ allowEmpty: false })) {
+            setBusy(false);
+            spaceNameField.current.focus();
+            spaceNameField.current.validate({ allowEmpty: false, focused: true });
+            return;
+        }
+        // validate the space name alias field but do not require it
+        if (joinRule === JoinRule.Public && !await spaceAliasField.current.validate({ allowEmpty: true })) {
+            setBusy(false);
+            spaceAliasField.current.focus();
+            spaceAliasField.current.validate({ allowEmpty: true, focused: true });
+            return;
+        }
+
+        try {
+            const [rooms, members, invitedMembers] = await Promise.all([
+                cli.getGroupRooms(groupId).then(parseRoomsResponse) as Promise<IGroupRoom[]>,
+                cli.getGroupUsers(groupId).then(parseMembersResponse) as Promise<GroupMember[]>,
+                cli.getGroupInvitedUsers(groupId).then(parseMembersResponse) as Promise<GroupMember[]>,
+            ]);
+
+            const viaMap = new Map<string, string[]>();
+            for (const { roomId, canonicalAlias } of rooms) {
+                const room = cli.getRoom(roomId);
+                if (room) {
+                    viaMap.set(roomId, calculateRoomVia(room));
+                } else if (canonicalAlias) {
+                    try {
+                        const { servers } = await cli.getRoomIdForAlias(canonicalAlias);
+                        viaMap.set(roomId, servers);
+                    } catch (e) {
+                        console.warn("Failed to resolve alias during community migration", e);
+                    }
+                }
+
+                if (!viaMap.get(roomId)?.length) {
+                    // XXX: lets guess the via, this might end up being incorrect.
+                    const str = canonicalAlias || roomId;
+                    viaMap.set(roomId, [str.substring(1, str.indexOf(":"))]);
+                }
+            }
+
+            const spaceAvatar = avatar !== undefined ? avatar : groupSummary.profile.avatar_url;
+            const roomId = await createSpace(name, joinRule === JoinRule.Public, alias, topic, spaceAvatar, {
+                creation_content: {
+                    [CreateEventField]: groupId,
+                },
+                initial_state: rooms.map(({ roomId }) => ({
+                    type: EventType.SpaceChild,
+                    state_key: roomId,
+                    content: {
+                        via: viaMap.get(roomId) || [],
+                    },
+                })),
+                invite: [...members, ...invitedMembers].map(m => m.userId).filter(m => m !== cli.getUserId()),
+            }, {
+                andView: false,
+            });
+
+            // eagerly remove it from the community panel
+            dis.dispatch(TagOrderActions.removeTag(cli, groupId));
+
+            // don't bother awaiting this, as we don't hugely care if it fails
+            cli.setGroupProfile(groupId, {
+                ...groupSummary.profile,
+                long_description: `<a href="${makeRoomPermalink(roomId)}"><h1>` +
+                    _t("This community has been upgraded into a Space") + `</h1></a><br />`
+                    + groupSummary.profile.long_description,
+            } as IGroupSummary["profile"]).catch(e => {
+                console.warn("Failed to update community profile during migration", e);
+            });
+
+            onFinished(roomId);
+
+            const onSpaceClick = () => {
+                dis.dispatch({
+                    action: "view_room",
+                    room_id: roomId,
+                });
+            };
+
+            const onPreferencesClick = () => {
+                dis.dispatch({
+                    action: Action.ViewUserSettings,
+                    initialTabId: UserTab.Preferences,
+                });
+            };
+
+            let spacesDisabledCopy;
+            if (!SpaceStore.spacesEnabled) {
+                spacesDisabledCopy = _t("To view Spaces, hide communities in <a>Preferences</a>", {}, {
+                    a: sub => <AccessibleButton onClick={onPreferencesClick} kind="link">{ sub }</AccessibleButton>,
+                });
+            }
+
+            Modal.createDialog(InfoDialog, {
+                title: _t("Space created"),
+                description: <>
+                    <div className="mx_CreateSpaceFromCommunityDialog_SuccessInfoDialog_checkmark" />
+                    <p>
+                        { _t("<SpaceName/> has been made and everyone who was a part of the community has " +
+                            "been invited to it.", {}, {
+                            SpaceName: () => <AccessibleButton onClick={onSpaceClick} kind="link">
+                                { name }
+                            </AccessibleButton>,
+                        }) }
+                        &nbsp;
+                        { spacesDisabledCopy }
+                    </p>
+                    <p>
+                        { _t("To create a Space from another community, just pick the community in Preferences.") }
+                    </p>
+                </>,
+                button: _t("Preferences"),
+                onFinished: (openPreferences: boolean) => {
+                    if (openPreferences) {
+                        onPreferencesClick();
+                    }
+                },
+            }, "mx_CreateSpaceFromCommunityDialog_SuccessInfoDialog");
+        } catch (e) {
+            console.error(e);
+            setError(e);
+        }
+
+        setBusy(false);
+    };
+
+    let footer;
+    if (error) {
+        footer = <>
+            <img src={require("../../../../res/img/element-icons/warning-badge.svg")} height="24" width="24" alt="" />
+
+            <span className="mx_CreateSpaceFromCommunityDialog_error">
+                <div className="mx_CreateSpaceFromCommunityDialog_errorHeading">{ _t("Failed to migrate community") }</div>
+                <div className="mx_CreateSpaceFromCommunityDialog_errorCaption">{ _t("Try again") }</div>
+            </span>
+
+            <AccessibleButton className="mx_CreateSpaceFromCommunityDialog_retryButton" onClick={onCreateSpaceClick}>
+                { _t("Retry") }
+            </AccessibleButton>
+        </>;
+    } else {
+        footer = <>
+            <AccessibleButton kind="primary_outline" disabled={busy} onClick={() => onFinished()}>
+                { _t("Cancel") }
+            </AccessibleButton>
+            <AccessibleButton kind="primary" disabled={busy} onClick={onCreateSpaceClick}>
+                { busy ? _t("Creating...") : _t("Create Space") }
+            </AccessibleButton>
+        </>;
+    }
+
+    return <BaseDialog
+        title={_t("Create Space from community")}
+        className="mx_CreateSpaceFromCommunityDialog"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        <div className="mx_CreateSpaceFromCommunityDialog_content">
+            <p>
+                { _t("A link to the Space will be put in your community description.") }
+                &nbsp;
+                { _t("All rooms will be added and all community members will be invited.") }
+            </p>
+            <p className="mx_CreateSpaceFromCommunityDialog_flairNotice">
+                { _t("Flair won't be available in Spaces for the foreseeable future.") }
+            </p>
+
+            <SpaceCreateForm
+                busy={busy}
+                onSubmit={onCreateSpaceClick}
+                avatarUrl={groupSummary.profile.avatar_url
+                    ? mediaFromMxc(groupSummary.profile.avatar_url).getThumbnailOfSourceHttp(80, 80, "crop")
+                    : undefined
+                }
+                setAvatar={setAvatar}
+                name={name}
+                setName={setName}
+                nameFieldRef={spaceNameField}
+                topic={topic}
+                setTopic={setTopic}
+                alias={alias}
+                setAlias={setAlias}
+                showAliasField={joinRule === JoinRule.Public}
+                aliasFieldRef={spaceAliasField}
+            >
+                <p>{ _t("This description will be shown to people when they view your space") }</p>
+                <JoinRuleDropdown
+                    label={_t("Space visibility")}
+                    labelInvite={_t("Private space (invite only)")}
+                    labelPublic={_t("Public space")}
+                    value={joinRule}
+                    onChange={setJoinRule}
+                />
+                <p>{ joinRule === JoinRule.Public
+                    ? _t("Open space for anyone, best for communities")
+                    : _t("Invite only, best for yourself or teams")
+                }</p>
+                { joinRule !== JoinRule.Public &&
+                    <div className="mx_CreateSpaceFromCommunityDialog_nonPublicSpacer" />
+                }
+            </SpaceCreateForm>
+        </div>
+
+        <div className="mx_CreateSpaceFromCommunityDialog_footer">
+            { footer }
+        </div>
+    </BaseDialog>;
+};
+
+export default CreateSpaceFromCommunityDialog;
+

src/components/views/dialogs/CreateSubspaceDialog.tsx

@@ -0,0 +1,187 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useRef, useState } from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+import { JoinRule } from "matrix-js-sdk/src/@types/partials";
+
+import { _t } from '../../../languageHandler';
+import BaseDialog from "./BaseDialog";
+import AccessibleButton from "../elements/AccessibleButton";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import { BetaPill } from "../beta/BetaCard";
+import Field from "../elements/Field";
+import RoomAliasField from "../elements/RoomAliasField";
+import SpaceStore from "../../../stores/SpaceStore";
+import { createSpace, SpaceCreateForm } from "../spaces/SpaceCreateMenu";
+import { SubspaceSelector } from "./AddExistingToSpaceDialog";
+import JoinRuleDropdown from "../elements/JoinRuleDropdown";
+
+interface IProps {
+    space: Room;
+    onAddExistingSpaceClick(): void;
+    onFinished(added?: boolean): void;
+}
+
+const CreateSubspaceDialog: React.FC<IProps> = ({ space, onAddExistingSpaceClick, onFinished }) => {
+    const [parentSpace, setParentSpace] = useState(space);
+
+    const [busy, setBusy] = useState<boolean>(false);
+    const [name, setName] = useState("");
+    const spaceNameField = useRef<Field>();
+    const [alias, setAlias] = useState("");
+    const spaceAliasField = useRef<RoomAliasField>();
+    const [avatar, setAvatar] = useState<File>(null);
+    const [topic, setTopic] = useState<string>("");
+
+    const supportsRestricted = !!SpaceStore.instance.restrictedJoinRuleSupport?.preferred;
+
+    const spaceJoinRule = space.getJoinRule();
+    let defaultJoinRule = JoinRule.Invite;
+    if (spaceJoinRule === JoinRule.Public) {
+        defaultJoinRule = JoinRule.Public;
+    } else if (supportsRestricted) {
+        defaultJoinRule = JoinRule.Restricted;
+    }
+    const [joinRule, setJoinRule] = useState<JoinRule>(defaultJoinRule);
+
+    const onCreateSubspaceClick = async (e) => {
+        e.preventDefault();
+        if (busy) return;
+
+        setBusy(true);
+        // require & validate the space name field
+        if (!await spaceNameField.current.validate({ allowEmpty: false })) {
+            spaceNameField.current.focus();
+            spaceNameField.current.validate({ allowEmpty: false, focused: true });
+            setBusy(false);
+            return;
+        }
+        // validate the space name alias field but do not require it
+        if (joinRule === JoinRule.Public && !await spaceAliasField.current.validate({ allowEmpty: true })) {
+            spaceAliasField.current.focus();
+            spaceAliasField.current.validate({ allowEmpty: true, focused: true });
+            setBusy(false);
+            return;
+        }
+
+        try {
+            await createSpace(name, joinRule === JoinRule.Public, alias, topic, avatar, {}, { parentSpace, joinRule });
+
+            onFinished(true);
+        } catch (e) {
+            console.error(e);
+        }
+    };
+
+    let joinRuleMicrocopy: JSX.Element;
+    if (joinRule === JoinRule.Restricted) {
+        joinRuleMicrocopy = <p>
+            { _t(
+                "Anyone in <SpaceName/> will be able to find and join.", {}, {
+                    SpaceName: () => <b>{ parentSpace.name }</b>,
+                },
+            ) }
+        </p>;
+    } else if (joinRule === JoinRule.Public) {
+        joinRuleMicrocopy = <p>
+            { _t(
+                "Anyone will be able to find and join this space, not just members of <SpaceName/>.", {}, {
+                    SpaceName: () => <b>{ parentSpace.name }</b>,
+                },
+            ) }
+        </p>;
+    } else if (joinRule === JoinRule.Invite) {
+        joinRuleMicrocopy = <p>
+            { _t("Only people invited will be able to find and join this space.") }
+        </p>;
+    }
+
+    return <BaseDialog
+        title={(
+            <SubspaceSelector
+                title={_t("Create a space")}
+                space={space}
+                value={parentSpace}
+                onChange={setParentSpace}
+            />
+        )}
+        className="mx_CreateSubspaceDialog"
+        contentId="mx_CreateSubspaceDialog"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        <MatrixClientContext.Provider value={space.client}>
+            <div className="mx_CreateSubspaceDialog_content">
+                <div className="mx_CreateSubspaceDialog_betaNotice">
+                    <BetaPill />
+                    { _t("Add a space to a space you manage.") }
+                </div>
+
+                <SpaceCreateForm
+                    busy={busy}
+                    onSubmit={onCreateSubspaceClick}
+                    setAvatar={setAvatar}
+                    name={name}
+                    setName={setName}
+                    nameFieldRef={spaceNameField}
+                    topic={topic}
+                    setTopic={setTopic}
+                    alias={alias}
+                    setAlias={setAlias}
+                    showAliasField={joinRule === JoinRule.Public}
+                    aliasFieldRef={spaceAliasField}
+                >
+                    <JoinRuleDropdown
+                        label={_t("Space visibility")}
+                        labelInvite={_t("Private space (invite only)")}
+                        labelPublic={_t("Public space")}
+                        labelRestricted={supportsRestricted ? _t("Visible to space members") : undefined}
+                        width={478}
+                        value={joinRule}
+                        onChange={setJoinRule}
+                    />
+                    { joinRuleMicrocopy }
+                </SpaceCreateForm>
+            </div>
+
+            <div className="mx_CreateSubspaceDialog_footer">
+                <div className="mx_CreateSubspaceDialog_footer_prompt">
+                    <div>{ _t("Want to add an existing space instead?") }</div>
+                    <AccessibleButton
+                        kind="link"
+                        onClick={() => {
+                            onAddExistingSpaceClick();
+                            onFinished();
+                        }}
+                    >
+                        { _t("Add existing space") }
+                    </AccessibleButton>
+                </div>
+
+                <AccessibleButton kind="primary_outline" disabled={busy} onClick={() => onFinished(false)}>
+                    { _t("Cancel") }
+                </AccessibleButton>
+                <AccessibleButton kind="primary" disabled={busy} onClick={onCreateSubspaceClick}>
+                    { busy ? _t("Adding...") : _t("Add") }
+                </AccessibleButton>
+            </div>
+        </MatrixClientContext.Provider>
+    </BaseDialog>;
+};
+
+export default CreateSubspaceDialog;
+

src/components/views/dialogs/CryptoStoreTooNewDialog.tsx

@@ -72,7 +72,7 @@ const CryptoStoreTooNewDialog: React.FC<IProps> = (props: IProps) => {
             hasCancel={false}
             onPrimaryButtonClick={props.onFinished}
         >
-            <button onClick={_onLogoutClicked} >
+            <button onClick={_onLogoutClicked}>
                 { _t('Sign out') }
             </button>
         </DialogButtons>

src/components/views/dialogs/DeactivateAccountDialog.tsx

@@ -16,6 +16,7 @@ limitations under the License.
 */
 
 import React from 'react';
+import { AuthType, IAuthData } from 'matrix-js-sdk/src/interactive-auth';
 
 import Analytics from '../../../Analytics';
 import { MatrixClientPeg } from '../../../MatrixClientPeg';
@@ -65,7 +66,7 @@ export default class DeactivateAccountDialog extends React.Component<IProps, ISt
         this.initAuth(/* shouldErase= */false);
     }
 
-    private onStagePhaseChange = (stage: string, phase: string): void => {
+    private onStagePhaseChange = (stage: AuthType, phase: string): void => {
         const dialogAesthetics = {
             [SSOAuthEntry.PHASE_PREAUTH]: {
                 body: _t("Confirm your account deactivation by using Single Sign On to prove your identity."),
@@ -115,7 +116,10 @@ export default class DeactivateAccountDialog extends React.Component<IProps, ISt
         this.setState({ errStr: _t("There was a problem communicating with the server. Please try again.") });
     };
 
-    private onUIAuthComplete = (auth: any): void => {
+    private onUIAuthComplete = (auth: IAuthData): void => {
+        // XXX: this should be returning a promise to maintain the state inside the state machine correct
+        // but given that a deactivation is followed by a local logout and all object instances being thrown away
+        // this isn't done.
         MatrixClientPeg.get().deactivateAccount(auth, this.state.shouldErase).then(r => {
             // Deactivation worked - logout & close this dialog
             Analytics.trackEvent('Account', 'Deactivate Account');
@@ -180,7 +184,9 @@ export default class DeactivateAccountDialog extends React.Component<IProps, ISt
                     <InteractiveAuth
                         matrixClient={MatrixClientPeg.get()}
                         authData={this.state.authData}
-                        makeRequest={this.onUIAuthComplete}
+                        // XXX: onUIAuthComplete breaches the expected method contract, it gets away with it because it
+                        // knows the entire app is about to die as a result of the account deactivation.
+                        makeRequest={this.onUIAuthComplete as any}
                         onAuthFinished={this.onUIAuthFinished}
                         onStagePhaseChange={this.onStagePhaseChange}
                         continueText={this.state.continueText}

src/components/views/dialogs/DevtoolsDialog.tsx

@@ -182,14 +182,23 @@ export class SendCustomEvent extends GenericEditor<ISendCustomEventProps, ISendC
 
                 <br />
 
-                <Field id="evContent" label={_t("Event Content")} type="text" className="mx_DevTools_textarea"
-                    autoComplete="off" value={this.state.evContent} onChange={this.onChange} element="textarea" />
+                <Field
+                    id="evContent"
+                    label={_t("Event Content")}
+                    type="text"
+                    className="mx_DevTools_textarea"
+                    autoComplete="off"
+                    value={this.state.evContent}
+                    onChange={this.onChange}
+                    element="textarea" />
             </div>
             <div className="mx_Dialog_buttons">
                 <button onClick={this.onBack}>{ _t('Back') }</button>
                 { !this.state.message && <button onClick={this.send}>{ _t('Send') }</button> }
                 { showTglFlip && <div style={{ float: "right" }}>
-                    <input id="isStateEvent" className="mx_DevTools_tgl mx_DevTools_tgl-flip"
+                    <input
+                        id="isStateEvent"
+                        className="mx_DevTools_tgl mx_DevTools_tgl-flip"
                         type="checkbox"
                         checked={this.state.isStateEvent}
                         onChange={this.onChange}
@@ -282,14 +291,24 @@ class SendAccountData extends GenericEditor<ISendAccountDataProps, ISendAccountD
                 { this.textInput('eventType', _t('Event Type')) }
                 <br />
 
-                <Field id="evContent" label={_t("Event Content")} type="text" className="mx_DevTools_textarea"
-                    autoComplete="off" value={this.state.evContent} onChange={this.onChange} element="textarea" />
+                <Field
+                    id="evContent"
+                    label={_t("Event Content")}
+                    type="text"
+                    className="mx_DevTools_textarea"
+                    autoComplete="off"
+                    value={this.state.evContent}
+                    onChange={this.onChange}
+                    element="textarea"
+                />
             </div>
             <div className="mx_Dialog_buttons">
                 <button onClick={this.onBack}>{ _t('Back') }</button>
                 { !this.state.message && <button onClick={this.send}>{ _t('Send') }</button> }
                 { !this.state.message && <div style={{ float: "right" }}>
-                    <input id="isRoomAccountData" className="mx_DevTools_tgl mx_DevTools_tgl-flip"
+                    <input
+                        id="isRoomAccountData"
+                        className="mx_DevTools_tgl mx_DevTools_tgl-flip"
                         type="checkbox"
                         checked={this.state.isRoomAccountData}
                         disabled={this.props.forceMode}
@@ -371,11 +390,18 @@ class FilteredList extends React.PureComponent<IFilteredListProps, IFilteredList
 
     render() {
         return <div>
-            <Field label={_t('Filter results')} autoFocus={true} size={64}
-                type="text" autoComplete="off" value={this.props.query} onChange={this.onQuery}
+            <Field
+                label={_t('Filter results')}
+                autoFocus={true}
+                size={64}
+                type="text"
+                autoComplete="off"
+                value={this.props.query}
+                onChange={this.onQuery}
                 className="mx_TextInputDialog_input mx_DevTools_RoomStateExplorer_query"
                 // force re-render so that autoFocus is applied when this component is re-used
-                key={this.props.children[0] ? this.props.children[0].key : ''} />
+                key={this.props.children[0] ? this.props.children[0].key : ''}
+            />
 
             <TruncatedList getChildren={this.getChildren}
                 getChildCount={this.getChildCount}
@@ -459,11 +485,16 @@ class RoomStateExplorer extends React.PureComponent<IExplorerProps, IRoomStateEx
     render() {
         if (this.state.event) {
             if (this.state.editing) {
-                return <SendCustomEvent room={this.props.room} forceStateEvent={true} onBack={this.onBack} inputs={{
-                    eventType: this.state.event.getType(),
-                    evContent: JSON.stringify(this.state.event.getContent(), null, '\t'),
-                    stateKey: this.state.event.getStateKey(),
-                }} />;
+                return <SendCustomEvent
+                    room={this.props.room}
+                    forceStateEvent={true}
+                    onBack={this.onBack}
+                    inputs={{
+                        eventType: this.state.event.getType(),
+                        evContent: JSON.stringify(this.state.event.getContent(), null, '\t'),
+                        stateKey: this.state.event.getStateKey(),
+                    }}
+                />;
             }
 
             return <div className="mx_ViewSource">
@@ -594,7 +625,9 @@ class AccountDataExplorer extends React.PureComponent<IExplorerProps, IAccountDa
                     inputs={{
                         eventType: this.state.event.getType(),
                         evContent: JSON.stringify(this.state.event.getContent(), null, '\t'),
-                    }} forceMode={true} />;
+                    }}
+                    forceMode={true}
+                />;
             }
 
             return <div className="mx_ViewSource">
@@ -631,7 +664,9 @@ class AccountDataExplorer extends React.PureComponent<IExplorerProps, IAccountDa
             <div className="mx_Dialog_buttons">
                 <button onClick={this.onBack}>{ _t('Back') }</button>
                 <div style={{ float: "right" }}>
-                    <input id="isRoomAccountData" className="mx_DevTools_tgl mx_DevTools_tgl-flip"
+                    <input
+                        id="isRoomAccountData"
+                        className="mx_DevTools_tgl mx_DevTools_tgl-flip"
                         type="checkbox"
                         checked={this.state.isRoomAccountData}
                         onChange={this.onChange}
@@ -1021,8 +1056,13 @@ class SettingsExplorer extends React.PureComponent<IExplorerProps, ISettingsExpl
                 <div>
                     <div className="mx_Dialog_content mx_DevTools_SettingsExplorer">
                         <Field
-                            label={_t('Filter results')} autoFocus={true} size={64}
-                            type="text" autoComplete="off" value={this.state.query} onChange={this.onQueryChange}
+                            label={_t('Filter results')}
+                            autoFocus={true}
+                            size={64}
+                            type="text"
+                            autoComplete="off"
+                            value={this.state.query}
+                            onChange={this.onQueryChange}
                             className="mx_TextInputDialog_input mx_DevTools_RoomStateExplorer_query"
                         />
                         <table>
@@ -1040,7 +1080,9 @@ class SettingsExplorer extends React.PureComponent<IExplorerProps, ISettingsExpl
                                             <a href="" onClick={(e) => this.onViewClick(e, i)}>
                                                 <code>{ i }</code>
                                             </a>
-                                            <a href="" onClick={(e) => this.onEditClick(e, i)}
+                                            <a
+                                                href=""
+                                                onClick={(e) => this.onEditClick(e, i)}
                                                 className='mx_DevTools_SettingsExplorer_edit'
                                             >
                                             ✏
@@ -1104,18 +1146,26 @@ class SettingsExplorer extends React.PureComponent<IExplorerProps, ISettingsExpl
 
                         <div>
                             <Field
-                                id="valExpl" label={_t("Values at explicit levels")} type="text"
-                                className="mx_DevTools_textarea" element="textarea"
-                                autoComplete="off" value={this.state.explicitValues}
+                                id="valExpl"
+                                label={_t("Values at explicit levels")}
+                                type="text"
+                                className="mx_DevTools_textarea"
+                                element="textarea"
+                                autoComplete="off"
+                                value={this.state.explicitValues}
                                 onChange={this.onExplValuesEdit}
                             />
                         </div>
 
                         <div>
                             <Field
-                                id="valExpl" label={_t("Values at explicit levels in this room")} type="text"
-                                className="mx_DevTools_textarea" element="textarea"
-                                autoComplete="off" value={this.state.explicitRoomValues}
+                                id="valExpl"
+                                label={_t("Values at explicit levels in this room")}
+                                type="text"
+                                className="mx_DevTools_textarea"
+                                element="textarea"
+                                autoComplete="off"
+                                value={this.state.explicitRoomValues}
                                 onChange={this.onExplRoomValuesEdit}
                             />
                         </div>

src/components/views/dialogs/EditCommunityPrototypeDialog.tsx

@@ -144,8 +144,10 @@ export default class EditCommunityPrototypeDialog extends React.PureComponent<IP
                         </div>
                         <div className="mx_EditCommunityPrototypeDialog_rowAvatar">
                             <input
-                                type="file" style={{ display: "none" }}
-                                ref={this.avatarUploadRef} accept="image/*"
+                                type="file"
+                                style={{ display: "none" }}
+                                ref={this.avatarUploadRef}
+                                accept="image/*"
                                 onChange={this.onAvatarChanged}
                             />
                             <AccessibleButton

src/components/views/dialogs/FeedbackDialog.js

@@ -28,7 +28,7 @@ import StyledRadioGroup from "../elements/StyledRadioGroup";
 
 const existingIssuesUrl = "https://github.com/vector-im/element-web/issues" +
     "?q=is%3Aopen+is%3Aissue+sort%3Areactions-%2B1-desc";
-const newIssueUrl = "https://github.com/vector-im/element-web/issues/new";
+const newIssueUrl = "https://github.com/vector-im/element-web/issues/new/choose";
 
 export default (props) => {
     const [rating, setRating] = useState("");

src/components/views/dialogs/ForwardDialog.tsx

@@ -106,12 +106,12 @@ const Entry: React.FC<IEntryProps> = ({ room, event, matrixClient: cli, onFinish
         className = "mx_ForwardList_sending";
         disabled = true;
         title = _t("Sending");
-        icon = <div className="mx_ForwardList_sendIcon" aria-label={title}></div>;
+        icon = <div className="mx_ForwardList_sendIcon" aria-label={title} />;
     } else if (sendState === SendState.Sent) {
         className = "mx_ForwardList_sent";
         disabled = true;
         title = _t("Sent");
-        icon = <div className="mx_ForwardList_sendIcon" aria-label={title}></div>;
+        icon = <div className="mx_ForwardList_sendIcon" aria-label={title} />;
     } else {
         className = "mx_ForwardList_sendFailed";
         disabled = true;
@@ -204,10 +204,16 @@ const ForwardDialog: React.FC<IProps> = ({ matrixClient: cli, event, permalinkCr
     function overflowTile(overflowCount, totalCount) {
         const text = _t("and %(count)s others...", { count: overflowCount });
         return (
-            <EntityTile className="mx_EntityTile_ellipsis" avatarJsx={
-                <BaseAvatar url={require("../../../../res/img/ellipsis.svg")} name="..." width={36} height={36} />
-            } name={text} presenceState="online" suppressOnHover={true}
-            onClick={() => setTruncateAt(totalCount)} />
+            <EntityTile
+                className="mx_EntityTile_ellipsis"
+                avatarJsx={
+                    <BaseAvatar url={require("../../../../res/img/ellipsis.svg")} name="..." width={36} height={36} />
+                }
+                name={text}
+                presenceState="online"
+                suppressOnHover={true}
+                onClick={() => setTruncateAt(totalCount)}
+            />
         );
     }
 

src/components/views/dialogs/GenericFeatureFeedbackDialog.tsx

@@ -0,0 +1,101 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useState } from "react";
+
+import QuestionDialog from './QuestionDialog';
+import { _t } from '../../../languageHandler';
+import Field from "../elements/Field";
+import SdkConfig from "../../../SdkConfig";
+import { IDialogProps } from "./IDialogProps";
+import { submitFeedback } from "../../../rageshake/submit-rageshake";
+import StyledCheckbox from "../elements/StyledCheckbox";
+import Modal from "../../../Modal";
+import InfoDialog from "./InfoDialog";
+
+interface IProps extends IDialogProps {
+    title: string;
+    subheading: string;
+    rageshakeLabel: string;
+    rageshakeData?: Record<string, string>;
+}
+
+const GenericFeatureFeedbackDialog: React.FC<IProps> = ({
+    title,
+    subheading,
+    children,
+    rageshakeLabel,
+    rageshakeData = {},
+    onFinished,
+}) => {
+    const [comment, setComment] = useState("");
+    const [canContact, setCanContact] = useState(false);
+
+    const sendFeedback = async (ok: boolean) => {
+        if (!ok) return onFinished(false);
+
+        submitFeedback(SdkConfig.get().bug_report_endpoint_url, rageshakeLabel, comment, canContact, rageshakeData);
+        onFinished(true);
+
+        Modal.createTrackedDialog("Feedback Sent", rageshakeLabel, InfoDialog, {
+            title,
+            description: _t("Thank you for your feedback, we really appreciate it."),
+            button: _t("Done"),
+            hasCloseButton: false,
+            fixedWidth: false,
+        });
+    };
+
+    return (<QuestionDialog
+        className="mx_GenericFeatureFeedbackDialog"
+        hasCancelButton={true}
+        title={title}
+        description={<React.Fragment>
+            <div className="mx_GenericFeatureFeedbackDialog_subheading">
+                { subheading }
+                &nbsp;
+                { _t("Your platform and username will be noted to help us use your feedback as much as we can.") }
+
+                { children }
+            </div>
+
+            <Field
+                id="feedbackComment"
+                label={_t("Feedback")}
+                type="text"
+                autoComplete="off"
+                value={comment}
+                element="textarea"
+                onChange={(ev) => {
+                    setComment(ev.target.value);
+                }}
+                autoFocus={true}
+            />
+
+            <StyledCheckbox
+                checked={canContact}
+                onChange={e => setCanContact((e.target as HTMLInputElement).checked)}
+            >
+                { _t("You may contact me if you have any follow up questions") }
+            </StyledCheckbox>
+        </React.Fragment>}
+        button={_t("Send feedback")}
+        buttonDisabled={!comment}
+        onFinished={sendFeedback}
+    />);
+};
+
+export default GenericFeatureFeedbackDialog;

src/components/views/dialogs/IncomingSasDialog.js

@@ -133,18 +133,23 @@ export default class IncomingSasDialog extends React.Component {
                 ? mediaFromMxc(oppProfile.avatar_url).getSquareThumbnailHttp(48)
                 : null;
             profile = <div className="mx_IncomingSasDialog_opponentProfile">
-                <BaseAvatar name={oppProfile.displayname}
+                <BaseAvatar
+                    name={oppProfile.displayname}
                     idName={this.props.verifier.userId}
                     url={url}
-                    width={48} height={48} resizeMethod='crop'
+                    width={48}
+                    height={48}
+                    resizeMethod='crop'
                 />
                 <h2>{ oppProfile.displayname }</h2>
             </div>;
         } else if (this.state.opponentProfileError) {
             profile = <div>
-                <BaseAvatar name={this.props.verifier.userId.slice(1)}
+                <BaseAvatar
+                    name={this.props.verifier.userId.slice(1)}
                     idName={this.props.verifier.userId}
-                    width={48} height={48}
+                    width={48}
+                    height={48}
                 />
                 <h2>{ this.props.verifier.userId }</h2>
             </div>;

src/components/views/dialogs/InfoDialog.tsx

@@ -1,7 +1,6 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017 New Vector Ltd.
 Copyright 2019 Bastian Masanek, Noxware IT <matrix@noxware.de>
+Copyright 2015 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -16,31 +15,31 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
-import PropTypes from 'prop-types';
-import * as sdk from '../../../index';
-import { _t } from '../../../languageHandler';
+import React, { ReactNode, KeyboardEvent } from 'react';
 import classNames from "classnames";
 
-export default class InfoDialog extends React.Component {
-    static propTypes = {
-        className: PropTypes.string,
-        title: PropTypes.string,
-        description: PropTypes.node,
-        button: PropTypes.oneOfType([PropTypes.string, PropTypes.bool]),
-        onFinished: PropTypes.func,
-        hasCloseButton: PropTypes.bool,
-        onKeyDown: PropTypes.func,
-        fixedWidth: PropTypes.bool,
-    };
+import { _t } from '../../../languageHandler';
+import * as sdk from '../../../index';
+import { IDialogProps } from "./IDialogProps";
 
+interface IProps extends IDialogProps {
+    title?: string;
+    description?: ReactNode;
+    className?: string;
+    button?: boolean | string;
+    hasCloseButton?: boolean;
+    fixedWidth?: boolean;
+    onKeyDown?(event: KeyboardEvent): void;
+}
+
+export default class InfoDialog extends React.Component<IProps> {
     static defaultProps = {
         title: '',
         description: '',
         hasCloseButton: false,
     };
 
-    onFinished = () => {
+    private onFinished = () => {
         this.props.onFinished();
     };
 
@@ -63,8 +62,7 @@ export default class InfoDialog extends React.Component {
                 { this.props.button !== false && <DialogButtons primaryButton={this.props.button || _t('OK')}
                     onPrimaryButtonClick={this.onFinished}
                     hasCancel={false}
-                >
-                </DialogButtons> }
+                /> }
             </BaseDialog>
         );
     }

src/components/views/dialogs/InviteDialog.tsx

@@ -55,7 +55,7 @@ import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { mediaFromMxc } from "../../../customisations/Media";
 import { getAddressType } from "../../../UserAddress";
 import BaseAvatar from '../avatars/BaseAvatar';
-import AccessibleButton from '../elements/AccessibleButton';
+import AccessibleButton, { ButtonEvent } from '../elements/AccessibleButton';
 import { compare } from '../../../utils/strings';
 import { IInvite3PID } from "matrix-js-sdk/src/@types/requests";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
@@ -196,7 +196,9 @@ class DMUserTile extends React.PureComponent<IDMUserTileProps> {
             ? <img
                 className='mx_InviteDialog_userTile_avatar mx_InviteDialog_userTile_threepidAvatar'
                 src={require("../../../../res/img/icon-email-pill-avatar.svg")}
-                width={avatarSize} height={avatarSize} />
+                width={avatarSize}
+                height={avatarSize}
+            />
             : <BaseAvatar
                 className='mx_InviteDialog_userTile_avatar'
                 url={this.props.member.getMxcAvatarUrl()
@@ -214,8 +216,11 @@ class DMUserTile extends React.PureComponent<IDMUserTileProps> {
                     className='mx_InviteDialog_userTile_remove'
                     onClick={this.onRemove}
                 >
-                    <img src={require("../../../../res/img/icon-pill-remove.svg")}
-                        alt={_t('Remove')} width={8} height={8}
+                    <img
+                        src={require("../../../../res/img/icon-pill-remove.svg")}
+                        alt={_t('Remove')}
+                        width={8}
+                        height={8}
                     />
                 </AccessibleButton>
             );
@@ -297,7 +302,9 @@ class DMRoomTile extends React.PureComponent<IDMRoomTileProps> {
         const avatar = (this.props.member as ThreepidMember).isEmail
             ? <img
                 src={require("../../../../res/img/icon-email-pill-avatar.svg")}
-                width={avatarSize} height={avatarSize} />
+                width={avatarSize}
+                height={avatarSize}
+            />
             : <BaseAvatar
                 url={this.props.member.getMxcAvatarUrl()
                     ? mediaFromMxc(this.props.member.getMxcAvatarUrl()).getSquareThumbnailHttp(avatarSize)
@@ -387,6 +394,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
     private closeCopiedTooltip: () => void;
     private debounceTimer: number = null; // actually number because we're in the browser
     private editorRef = createRef<HTMLInputElement>();
+    private numberEntryFieldRef: React.RefObject<Field> = createRef();
     private unmounted = false;
 
     constructor(props) {
@@ -1276,13 +1284,27 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
         this.setState({ dialPadValue: ev.currentTarget.value });
     };
 
-    private onDigitPress = digit => {
+    private onDigitPress = (digit: string, ev: ButtonEvent) => {
         this.setState({ dialPadValue: this.state.dialPadValue + digit });
+
+        // Keep the number field focused so that keyboard entry is still available
+        // However, don't focus if this wasn't the result of directly clicking on the button,
+        // i.e someone using keyboard navigation.
+        if (ev.type === "click") {
+            this.numberEntryFieldRef.current?.focus();
+        }
     };
 
-    private onDeletePress = () => {
+    private onDeletePress = (ev: ButtonEvent) => {
         if (this.state.dialPadValue.length === 0) return;
         this.setState({ dialPadValue: this.state.dialPadValue.slice(0, -1) });
+
+        // Keep the number field focused so that keyboard entry is still available
+        // However, don't focus if this wasn't the result of directly clicking on the button,
+        // i.e someone using keyboard navigation.
+        if (ev.type === "click") {
+            this.numberEntryFieldRef.current?.focus();
+        }
     };
 
     private onTabChange = (tabId: TabId) => {
@@ -1458,7 +1480,8 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
                         <p className='mx_InviteDialog_helpText'>
                             <img
                                 src={require("../../../../res/img/element-icons/info.svg")}
-                                width={14} height={14} />
+                                width={14}
+                                height={14} />
                             { " " + _t("Invited people will be able to read old messages.") }
                         </p>;
                 }
@@ -1534,14 +1557,20 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             // Only show the backspace button if the field has content
             let dialPadField;
             if (this.state.dialPadValue.length !== 0) {
-                dialPadField = <Field className="mx_InviteDialog_dialPadField" id="dialpad_number"
+                dialPadField = <Field
+                    ref={this.numberEntryFieldRef}
+                    className="mx_InviteDialog_dialPadField"
+                    id="dialpad_number"
                     value={this.state.dialPadValue}
                     autoFocus={true}
                     onChange={this.onDialChange}
                     postfixComponent={backspaceButton}
                 />;
             } else {
-                dialPadField = <Field className="mx_InviteDialog_dialPadField" id="dialpad_number"
+                dialPadField = <Field
+                    ref={this.numberEntryFieldRef}
+                    className="mx_InviteDialog_dialPadField"
+                    id="dialpad_number"
                     value={this.state.dialPadValue}
                     autoFocus={true}
                     onChange={this.onDialChange}
@@ -1552,14 +1581,19 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
                 <form onSubmit={this.onDialFormSubmit}>
                     { dialPadField }
                 </form>
-                <Dialpad hasDial={false}
-                    onDigitPress={this.onDigitPress} onDeletePress={this.onDeletePress}
+                <Dialpad
+                    hasDial={false}
+                    onDigitPress={this.onDigitPress}
+                    onDeletePress={this.onDeletePress}
                 />
             </div>;
             tabs.push(new Tab(TabId.DialPad, _td("Dial pad"), 'mx_InviteDialog_dialPadIcon', dialPadSection));
             dialogContent = <React.Fragment>
-                <TabbedView tabs={tabs} initialTabId={this.state.currentTabId}
-                    tabLocation={TabLocation.TOP} onChange={this.onTabChange}
+                <TabbedView
+                    tabs={tabs}
+                    initialTabId={this.state.currentTabId}
+                    tabLocation={TabLocation.TOP}
+                    onChange={this.onTabChange}
                 />
                 { consultConnectSection }
             </React.Fragment>;

src/components/views/dialogs/KeySignatureUploadFailedDialog.js

@@ -20,10 +20,10 @@ import { _t } from '../../../languageHandler';
 import SdkConfig from '../../../SdkConfig';
 
 export default function KeySignatureUploadFailedDialog({
-        failures,
-        source,
-        continuation,
-        onFinished,
+    failures,
+    source,
+    continuation,
+    onFinished,
 }) {
     const RETRIES = 2;
     const BaseDialog = sdk.getComponent('dialogs.BaseDialog');

src/components/views/dialogs/LeaveSpaceDialog.tsx

@@ -0,0 +1,197 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useEffect, useMemo, useState } from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+import { JoinRule } from "matrix-js-sdk/src/@types/partials";
+
+import { _t } from '../../../languageHandler';
+import DialogButtons from "../elements/DialogButtons";
+import BaseDialog from "../dialogs/BaseDialog";
+import SpaceStore from "../../../stores/SpaceStore";
+import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
+import { Entry } from "./AddExistingToSpaceDialog";
+import SearchBox from "../../structures/SearchBox";
+import QueryMatcher from "../../../autocomplete/QueryMatcher";
+import StyledRadioGroup from "../elements/StyledRadioGroup";
+
+enum RoomsToLeave {
+    All = "All",
+    Specific = "Specific",
+    None = "None",
+}
+
+const SpaceChildPicker = ({ filterPlaceholder, rooms, selected, onChange }) => {
+    const [query, setQuery] = useState("");
+    const lcQuery = query.toLowerCase().trim();
+
+    const filteredRooms = useMemo(() => {
+        if (!lcQuery) {
+            return rooms;
+        }
+
+        const matcher = new QueryMatcher<Room>(rooms, {
+            keys: ["name"],
+            funcs: [r => [r.getCanonicalAlias(), ...r.getAltAliases()].filter(Boolean)],
+            shouldMatchWordsOnly: false,
+        });
+
+        return matcher.match(lcQuery);
+    }, [rooms, lcQuery]);
+
+    return <div className="mx_LeaveSpaceDialog_section">
+        <SearchBox
+            className="mx_textinput_icon mx_textinput_search"
+            placeholder={filterPlaceholder}
+            onSearch={setQuery}
+            autoComplete={true}
+            autoFocus={true}
+        />
+        <AutoHideScrollbar className="mx_LeaveSpaceDialog_content">
+            { filteredRooms.map(room => {
+                return <Entry
+                    key={room.roomId}
+                    room={room}
+                    checked={selected.has(room)}
+                    onChange={(checked) => {
+                        onChange(checked, room);
+                    }}
+                />;
+            }) }
+            { filteredRooms.length < 1 ? <span className="mx_LeaveSpaceDialog_noResults">
+                { _t("No results") }
+            </span> : undefined }
+        </AutoHideScrollbar>
+    </div>;
+};
+
+const LeaveRoomsPicker = ({ space, spaceChildren, roomsToLeave, setRoomsToLeave }) => {
+    const selected = useMemo(() => new Set(roomsToLeave), [roomsToLeave]);
+    const [state, setState] = useState<string>(RoomsToLeave.None);
+
+    useEffect(() => {
+        if (state === RoomsToLeave.All) {
+            setRoomsToLeave(spaceChildren);
+        } else {
+            setRoomsToLeave([]);
+        }
+    }, [setRoomsToLeave, state, spaceChildren]);
+
+    return <div className="mx_LeaveSpaceDialog_section">
+        <StyledRadioGroup
+            name="roomsToLeave"
+            value={state}
+            onChange={setState}
+            definitions={[
+                {
+                    value: RoomsToLeave.None,
+                    label: _t("Don't leave any"),
+                }, {
+                    value: RoomsToLeave.All,
+                    label: _t("Leave all rooms and spaces"),
+                }, {
+                    value: RoomsToLeave.Specific,
+                    label: _t("Leave specific rooms and spaces"),
+                },
+            ]}
+        />
+
+        { state === RoomsToLeave.Specific && (
+            <SpaceChildPicker
+                filterPlaceholder={_t("Search %(spaceName)s", { spaceName: space.name })}
+                rooms={spaceChildren}
+                selected={selected}
+                onChange={(selected: boolean, room: Room) => {
+                    if (selected) {
+                        setRoomsToLeave([room, ...roomsToLeave]);
+                    } else {
+                        setRoomsToLeave(roomsToLeave.filter(r => r !== room));
+                    }
+                }}
+            />
+        ) }
+    </div>;
+};
+
+interface IProps {
+    space: Room;
+    onFinished(leave: boolean, rooms?: Room[]): void;
+}
+
+const isOnlyAdmin = (room: Room): boolean => {
+    return !room.getJoinedMembers().some(member => {
+        return member.userId !== room.client.credentials.userId && member.powerLevelNorm === 100;
+    });
+};
+
+const LeaveSpaceDialog: React.FC<IProps> = ({ space, onFinished }) => {
+    const spaceChildren = useMemo(() => SpaceStore.instance.getChildren(space.roomId), [space.roomId]);
+    const [roomsToLeave, setRoomsToLeave] = useState<Room[]>([]);
+
+    let rejoinWarning;
+    if (space.getJoinRule() !== JoinRule.Public) {
+        rejoinWarning = _t("You won't be able to rejoin unless you are re-invited.");
+    }
+
+    let onlyAdminWarning;
+    if (isOnlyAdmin(space)) {
+        onlyAdminWarning = _t("You're the only admin of this space. " +
+            "Leaving it will mean no one has control over it.");
+    } else {
+        const numChildrenOnlyAdminIn = roomsToLeave.filter(isOnlyAdmin).length;
+        if (numChildrenOnlyAdminIn > 0) {
+            onlyAdminWarning = _t("You're the only admin of some of the rooms or spaces you wish to leave. " +
+                "Leaving them will leave them without any admins.");
+        }
+    }
+
+    return <BaseDialog
+        title={_t("Leave %(spaceName)s", { spaceName: space.name })}
+        className="mx_LeaveSpaceDialog"
+        contentId="mx_LeaveSpaceDialog"
+        onFinished={() => onFinished(false)}
+        fixedWidth={false}
+    >
+        <div className="mx_Dialog_content" id="mx_LeaveSpaceDialog">
+            <p>
+                { _t("Are you sure you want to leave <spaceName/>?", {}, {
+                    spaceName: () => <b>{ space.name }</b>,
+                }) }
+                &nbsp;
+                { rejoinWarning }
+            </p>
+
+            { spaceChildren.length > 0 && <LeaveRoomsPicker
+                space={space}
+                spaceChildren={spaceChildren}
+                roomsToLeave={roomsToLeave}
+                setRoomsToLeave={setRoomsToLeave}
+            /> }
+
+            { onlyAdminWarning && <div className="mx_LeaveSpaceDialog_section_warning">
+                { onlyAdminWarning }
+            </div> }
+        </div>
+        <DialogButtons
+            primaryButton={_t("Leave space")}
+            onPrimaryButtonClick={() => onFinished(true, roomsToLeave)}
+            hasCancel={true}
+            onCancel={onFinished}
+        />
+    </BaseDialog>;
+};
+
+export default LeaveSpaceDialog;

src/components/views/dialogs/LogoutDialog.tsx

@@ -16,6 +16,7 @@ limitations under the License.
 */
 
 import React from 'react';
+import { IKeyBackupInfo } from "matrix-js-sdk/src/crypto/keybackup";
 import Modal from '../../../Modal';
 import * as sdk from '../../../index';
 import dis from '../../../dispatcher/dispatcher';
@@ -24,19 +25,25 @@ import { MatrixClientPeg } from '../../../MatrixClientPeg';
 import RestoreKeyBackupDialog from './security/RestoreKeyBackupDialog';
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 
+interface IProps {
+    onFinished: (success: boolean) => void;
+}
+
+interface IState {
+    shouldLoadBackupStatus: boolean;
+    loading: boolean;
+    backupInfo: IKeyBackupInfo;
+    error?: string;
+}
+
 @replaceableComponent("views.dialogs.LogoutDialog")
-export default class LogoutDialog extends React.Component {
-    defaultProps = {
+export default class LogoutDialog extends React.Component<IProps, IState> {
+    static defaultProps = {
         onFinished: function() {},
     };
 
-    constructor() {
-        super();
-        this._onSettingsLinkClick = this._onSettingsLinkClick.bind(this);
-        this._onExportE2eKeysClicked = this._onExportE2eKeysClicked.bind(this);
-        this._onFinished = this._onFinished.bind(this);
-        this._onSetRecoveryMethodClick = this._onSetRecoveryMethodClick.bind(this);
-        this._onLogoutConfirm = this._onLogoutConfirm.bind(this);
+    constructor(props) {
+        super(props);
 
         const cli = MatrixClientPeg.get();
         const shouldLoadBackupStatus = cli.isCryptoEnabled() && !cli.getKeyBackupEnabled();
@@ -49,11 +56,11 @@ export default class LogoutDialog extends React.Component {
         };
 
         if (shouldLoadBackupStatus) {
-            this._loadBackupStatus();
+            this.loadBackupStatus();
         }
     }
 
-    async _loadBackupStatus() {
+    private async loadBackupStatus() {
         try {
             const backupInfo = await MatrixClientPeg.get().getKeyBackupVersion();
             this.setState({
@@ -69,29 +76,29 @@ export default class LogoutDialog extends React.Component {
         }
     }
 
-    _onSettingsLinkClick() {
+    private onSettingsLinkClick = (): void => {
         // close dialog
-        this.props.onFinished();
-    }
+        this.props.onFinished(true);
+    };
 
-    _onExportE2eKeysClicked() {
+    private onExportE2eKeysClicked = (): void => {
         Modal.createTrackedDialogAsync('Export E2E Keys', '',
             import('../../../async-components/views/dialogs/security/ExportE2eKeysDialog'),
             {
                 matrixClient: MatrixClientPeg.get(),
             },
         );
-    }
+    };
 
-    _onFinished(confirmed) {
+    private onFinished = (confirmed: boolean): void => {
         if (confirmed) {
             dis.dispatch({ action: 'logout' });
         }
         // close dialog
-        this.props.onFinished();
-    }
+        this.props.onFinished(confirmed);
+    };
 
-    _onSetRecoveryMethodClick() {
+    private onSetRecoveryMethodClick = (): void => {
         if (this.state.backupInfo) {
             // A key backup exists for this account, but the creating device is not
             // verified, so restore the backup which will give us the keys from it and
@@ -108,15 +115,15 @@ export default class LogoutDialog extends React.Component {
         }
 
         // close dialog
-        this.props.onFinished();
-    }
+        this.props.onFinished(true);
+    };
 
-    _onLogoutConfirm() {
+    private onLogoutConfirm = (): void => {
         dis.dispatch({ action: 'logout' });
 
         // close dialog
-        this.props.onFinished();
-    }
+        this.props.onFinished(true);
+    };
 
     render() {
         if (this.state.shouldLoadBackupStatus) {
@@ -152,16 +159,16 @@ export default class LogoutDialog extends React.Component {
                     </div>
                     <DialogButtons primaryButton={setupButtonCaption}
                         hasCancel={false}
-                        onPrimaryButtonClick={this._onSetRecoveryMethodClick}
+                        onPrimaryButtonClick={this.onSetRecoveryMethodClick}
                         focus={true}
                     >
-                        <button onClick={this._onLogoutConfirm}>
+                        <button onClick={this.onLogoutConfirm}>
                             { _t("I don't want my encrypted messages") }
                         </button>
                     </DialogButtons>
                     <details>
                         <summary>{ _t("Advanced") }</summary>
-                        <p><button onClick={this._onExportE2eKeysClicked}>
+                        <p><button onClick={this.onExportE2eKeysClicked}>
                             { _t("Manually export keys") }
                         </button></p>
                     </details>
@@ -174,7 +181,7 @@ export default class LogoutDialog extends React.Component {
                 title={_t("You'll lose access to your encrypted messages")}
                 contentId='mx_Dialog_content'
                 hasCancel={true}
-                onFinished={this._onFinished}
+                onFinished={this.onFinished}
             >
                 { dialogContent }
             </BaseDialog>);
@@ -187,7 +194,7 @@ export default class LogoutDialog extends React.Component {
                     "Are you sure you want to sign out?",
                 )}
                 button={_t("Sign out")}
-                onFinished={this._onFinished}
+                onFinished={this.onFinished}
             />);
         }
     }

src/components/views/dialogs/ManageRestrictedJoinRuleDialog.tsx

@@ -0,0 +1,192 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { useMemo, useState } from "react";
+import { Room } from "matrix-js-sdk/src/models/room";
+
+import { _t } from '../../../languageHandler';
+import { IDialogProps } from "./IDialogProps";
+import BaseDialog from "./BaseDialog";
+import SearchBox from "../../structures/SearchBox";
+import SpaceStore from "../../../stores/SpaceStore";
+import RoomAvatar from "../avatars/RoomAvatar";
+import AccessibleButton from "../elements/AccessibleButton";
+import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
+import StyledCheckbox from "../elements/StyledCheckbox";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+
+interface IProps extends IDialogProps {
+    room: Room;
+    selected?: string[];
+}
+
+const Entry = ({ room, checked, onChange }) => {
+    const localRoom = room instanceof Room;
+
+    let description;
+    if (localRoom) {
+        description = _t("%(count)s members", { count: room.getJoinedMemberCount() });
+        const numChildRooms = SpaceStore.instance.getChildRooms(room.roomId).length;
+        if (numChildRooms > 0) {
+            description += " · " + _t("%(count)s rooms", { count: numChildRooms });
+        }
+    }
+
+    return <label className="mx_ManageRestrictedJoinRuleDialog_entry">
+        <div>
+            <div>
+                { localRoom
+                    ? <RoomAvatar room={room} height={20} width={20} />
+                    : <RoomAvatar oobData={room} height={20} width={20} />
+                }
+                <span className="mx_ManageRestrictedJoinRuleDialog_entry_name">{ room.name }</span>
+            </div>
+            { description && <div className="mx_ManageRestrictedJoinRuleDialog_entry_description">
+                { description }
+            </div> }
+        </div>
+        <StyledCheckbox
+            onChange={onChange ? (e) => onChange(e.target.checked) : null}
+            checked={checked}
+            disabled={!onChange}
+        />
+    </label>;
+};
+
+const ManageRestrictedJoinRuleDialog: React.FC<IProps> = ({ room, selected = [], onFinished }) => {
+    const cli = room.client;
+    const [newSelected, setNewSelected] = useState(new Set<string>(selected));
+    const [query, setQuery] = useState("");
+    const lcQuery = query.toLowerCase().trim();
+
+    const [spacesContainingRoom, otherEntries] = useMemo(() => {
+        const spaces = cli.getVisibleRooms().filter(r => r.getMyMembership() === "join" && r.isSpaceRoom());
+        return [
+            spaces.filter(r => SpaceStore.instance.getSpaceFilteredRoomIds(r).has(room.roomId)),
+            selected.map(roomId => {
+                const room = cli.getRoom(roomId);
+                if (!room) {
+                    return { roomId, name: roomId } as Room;
+                }
+                if (room.getMyMembership() !== "join" || !room.isSpaceRoom()) {
+                    return room;
+                }
+            }).filter(Boolean),
+        ];
+    }, [cli, selected, room.roomId]);
+
+    const [filteredSpacesContainingRooms, filteredOtherEntries] = useMemo(() => [
+        spacesContainingRoom.filter(r => r.name.toLowerCase().includes(lcQuery)),
+        otherEntries.filter(r => r.name.toLowerCase().includes(lcQuery)),
+    ], [spacesContainingRoom, otherEntries, lcQuery]);
+
+    const onChange = (checked: boolean, room: Room): void => {
+        if (checked) {
+            newSelected.add(room.roomId);
+        } else {
+            newSelected.delete(room.roomId);
+        }
+        setNewSelected(new Set(newSelected));
+    };
+
+    let inviteOnlyWarning;
+    if (newSelected.size < 1) {
+        inviteOnlyWarning = <div className="mx_ManageRestrictedJoinRuleDialog_section_info">
+            { _t("You're removing all spaces. Access will default to invite only") }
+        </div>;
+    }
+
+    return <BaseDialog
+        title={_t("Select spaces")}
+        className="mx_ManageRestrictedJoinRuleDialog"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        <p>
+            { _t("Decide which spaces can access this room. " +
+                "If a space is selected, its members can find and join <RoomName/>.", {}, {
+                RoomName: () => <b>{ room.name }</b>,
+            }) }
+        </p>
+        <MatrixClientContext.Provider value={cli}>
+            <SearchBox
+                className="mx_textinput_icon mx_textinput_search"
+                placeholder={_t("Search spaces")}
+                onSearch={setQuery}
+                autoComplete={true}
+                autoFocus={true}
+            />
+            <AutoHideScrollbar className="mx_ManageRestrictedJoinRuleDialog_content">
+                { filteredSpacesContainingRooms.length > 0 ? (
+                    <div className="mx_ManageRestrictedJoinRuleDialog_section">
+                        <h3>{ _t("Spaces you know that contain this room") }</h3>
+                        { filteredSpacesContainingRooms.map(space => {
+                            return <Entry
+                                key={space.roomId}
+                                room={space}
+                                checked={newSelected.has(space.roomId)}
+                                onChange={(checked: boolean) => {
+                                    onChange(checked, space);
+                                }}
+                            />;
+                        }) }
+                    </div>
+                ) : undefined }
+
+                { filteredOtherEntries.length > 0 ? (
+                    <div className="mx_ManageRestrictedJoinRuleDialog_section">
+                        <h3>{ _t("Other spaces or rooms you might not know") }</h3>
+                        <div className="mx_ManageRestrictedJoinRuleDialog_section_info">
+                            <div>{ _t("These are likely ones other room admins are a part of.") }</div>
+                        </div>
+                        { filteredOtherEntries.map(space => {
+                            return <Entry
+                                key={space.roomId}
+                                room={space}
+                                checked={newSelected.has(space.roomId)}
+                                onChange={(checked: boolean) => {
+                                    onChange(checked, space);
+                                }}
+                            />;
+                        }) }
+                    </div>
+                ) : null }
+
+                { filteredSpacesContainingRooms.length + filteredOtherEntries.length < 1
+                    ? <span className="mx_ManageRestrictedJoinRuleDialog_noResults">
+                        { _t("No results") }
+                    </span>
+                    : undefined
+                }
+            </AutoHideScrollbar>
+
+            <div className="mx_ManageRestrictedJoinRuleDialog_footer">
+                { inviteOnlyWarning }
+                <div className="mx_ManageRestrictedJoinRuleDialog_footer_buttons">
+                    <AccessibleButton kind="primary_outline" onClick={() => onFinished()}>
+                        { _t("Cancel") }
+                    </AccessibleButton>
+                    <AccessibleButton kind="primary" onClick={() => onFinished(Array.from(newSelected))}>
+                        { _t("Confirm") }
+                    </AccessibleButton>
+                </div>
+            </div>
+        </MatrixClientContext.Provider>
+    </BaseDialog>;
+};
+
+export default ManageRestrictedJoinRuleDialog;
+

src/components/views/dialogs/RoomSettingsDialog.tsx

@@ -79,7 +79,10 @@ export default class RoomSettingsDialog extends React.Component<IProps> {
             ROOM_SECURITY_TAB,
             _td("Security & Privacy"),
             "mx_RoomSettingsDialog_securityIcon",
-            <SecurityRoomSettingsTab roomId={this.props.roomId} />,
+            <SecurityRoomSettingsTab
+                roomId={this.props.roomId}
+                closeSettingsFn={() => this.props.onFinished(true)}
+            />,
         ));
         tabs.push(new Tab(
             ROOM_ROLES_TAB,

src/components/views/dialogs/RoomUpgradeDialog.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2018 New Vector Ltd
+Copyright 2018 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -15,19 +15,29 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
-import * as sdk from '../../../index';
-import { MatrixClientPeg } from '../../../MatrixClientPeg';
+import { Room } from "matrix-js-sdk/src/models/room";
+
 import Modal from '../../../Modal';
 import { _t } from '../../../languageHandler';
 import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { upgradeRoom } from "../../../utils/RoomUpgrade";
+import { IDialogProps } from "./IDialogProps";
+import BaseDialog from "./BaseDialog";
+import ErrorDialog from './ErrorDialog';
+import DialogButtons from '../elements/DialogButtons';
+import Spinner from "../elements/Spinner";
+
+interface IProps extends IDialogProps {
+    room: Room;
+}
+
+interface IState {
+    busy: boolean;
+}
 
 @replaceableComponent("views.dialogs.RoomUpgradeDialog")
-export default class RoomUpgradeDialog extends React.Component {
-    static propTypes = {
-        room: PropTypes.object.isRequired,
-        onFinished: PropTypes.func.isRequired,
-    };
+export default class RoomUpgradeDialog extends React.Component<IProps, IState> {
+    private targetVersion: string;
 
     state = {
         busy: true,
@@ -35,20 +45,19 @@ export default class RoomUpgradeDialog extends React.Component {
 
     async componentDidMount() {
         const recommended = await this.props.room.getRecommendedVersion();
-        this._targetVersion = recommended.version;
+        this.targetVersion = recommended.version;
         this.setState({ busy: false });
     }
 
-    _onCancelClick = () => {
+    private onCancelClick = (): void => {
         this.props.onFinished(false);
     };
 
-    _onUpgradeClick = () => {
+    private onUpgradeClick = (): void => {
         this.setState({ busy: true });
-        MatrixClientPeg.get().upgradeRoom(this.props.room.roomId, this._targetVersion).then(() => {
+        upgradeRoom(this.props.room, this.targetVersion, false, false).then(() => {
             this.props.onFinished(true);
         }).catch((err) => {
-            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
             Modal.createTrackedDialog('Failed to upgrade room', '', ErrorDialog, {
                 title: _t("Failed to upgrade room"),
                 description: ((err && err.message) ? err.message : _t("The room upgrade could not be completed")),
@@ -59,29 +68,22 @@ export default class RoomUpgradeDialog extends React.Component {
     };
 
     render() {
-        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
-        const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
-        const Spinner = sdk.getComponent('views.elements.Spinner');
-
         let buttons;
         if (this.state.busy) {
             buttons = <Spinner />;
         } else {
             buttons = <DialogButtons
-                primaryButton={_t(
-                    'Upgrade this room to version %(version)s',
-                    { version: this._targetVersion },
-                )}
+                primaryButton={_t('Upgrade this room to version %(version)s', { version: this.targetVersion })}
                 primaryButtonClass="danger"
                 hasCancel={true}
-                onPrimaryButtonClick={this._onUpgradeClick}
-                focus={this.props.focus}
-                onCancel={this._onCancelClick}
+                onPrimaryButtonClick={this.onUpgradeClick}
+                onCancel={this.onCancelClick}
             />;
         }
 
         return (
-            <BaseDialog className="mx_RoomUpgradeDialog"
+            <BaseDialog
+                className="mx_RoomUpgradeDialog"
                 onFinished={this.props.onFinished}
                 title={_t("Upgrade Room Version")}
                 contentId='mx_Dialog_content'
@@ -97,8 +99,10 @@ export default class RoomUpgradeDialog extends React.Component {
                 <ol>
                     <li>{ _t("Create a new room with the same name, description and avatar") }</li>
                     <li>{ _t("Update any local room aliases to point to the new room") }</li>
-                    <li>{ _t("Stop users from speaking in the old version of the room, and post a message advising users to move to the new room") }</li>
-                    <li>{ _t("Put a link back to the old room at the start of the new room so people can see old messages") }</li>
+                    <li>{ _t("Stop users from speaking in the old version of the room, " +
+                        "and post a message advising users to move to the new room") }</li>
+                    <li>{ _t("Put a link back to the old room at the start of the new room " +
+                        "so people can see old messages") }</li>
                 </ol>
                 { buttons }
             </BaseDialog>

src/components/views/dialogs/RoomUpgradeWarningDialog.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -14,73 +14,82 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
-import PropTypes from 'prop-types';
+import React, { ReactNode } from 'react';
+import { EventType } from 'matrix-js-sdk/src/@types/event';
+import { JoinRule } from 'matrix-js-sdk/src/@types/partials';
+
 import { _t } from "../../../languageHandler";
 import SdkConfig from "../../../SdkConfig";
-import * as sdk from "../../../index";
 import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
 import { MatrixClientPeg } from "../../../MatrixClientPeg";
 import Modal from "../../../Modal";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { IDialogProps } from "./IDialogProps";
+import BugReportDialog from './BugReportDialog';
+import BaseDialog from "./BaseDialog";
+import DialogButtons from "../elements/DialogButtons";
+
+interface IProps extends IDialogProps {
+    roomId: string;
+    targetVersion: string;
+    description?: ReactNode;
+}
+
+interface IState {
+    inviteUsersToNewRoom: boolean;
+}
 
 @replaceableComponent("views.dialogs.RoomUpgradeWarningDialog")
-export default class RoomUpgradeWarningDialog extends React.Component {
-    static propTypes = {
-        onFinished: PropTypes.func.isRequired,
-        roomId: PropTypes.string.isRequired,
-        targetVersion: PropTypes.string.isRequired,
-    };
+export default class RoomUpgradeWarningDialog extends React.Component<IProps, IState> {
+    private readonly isPrivate: boolean;
+    private readonly currentVersion: string;
 
     constructor(props) {
         super(props);
 
         const room = MatrixClientPeg.get().getRoom(this.props.roomId);
-        const joinRules = room ? room.currentState.getStateEvents("m.room.join_rules", "") : null;
-        const isPrivate = joinRules ? joinRules.getContent()['join_rule'] !== 'public' : true;
+        const joinRules = room?.currentState.getStateEvents(EventType.RoomJoinRules, "");
+        this.isPrivate = joinRules?.getContent()['join_rule'] !== JoinRule.Public ?? true;
+        this.currentVersion = room?.getVersion() || "1";
+
         this.state = {
-            currentVersion: room ? room.getVersion() : "1",
-            isPrivate,
             inviteUsersToNewRoom: true,
         };
     }
 
-    _onContinue = () => {
-        this.props.onFinished({ continue: true, invite: this.state.isPrivate && this.state.inviteUsersToNewRoom });
+    private onContinue = () => {
+        this.props.onFinished({ continue: true, invite: this.isPrivate && this.state.inviteUsersToNewRoom });
     };
 
-    _onCancel = () => {
+    private onCancel = () => {
         this.props.onFinished({ continue: false, invite: false });
     };
 
-    _onInviteUsersToggle = (newVal) => {
-        this.setState({ inviteUsersToNewRoom: newVal });
+    private onInviteUsersToggle = (inviteUsersToNewRoom: boolean) => {
+        this.setState({ inviteUsersToNewRoom });
     };
 
-    _openBugReportDialog = (e) => {
+    private openBugReportDialog = (e) => {
         e.preventDefault();
         e.stopPropagation();
 
-        const BugReportDialog = sdk.getComponent("dialogs.BugReportDialog");
         Modal.createTrackedDialog('Bug Report Dialog', '', BugReportDialog, {});
     };
 
     render() {
         const brand = SdkConfig.get().brand;
-        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
-        const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
         let inviteToggle = null;
-        if (this.state.isPrivate) {
+        if (this.isPrivate) {
             inviteToggle = (
                 <LabelledToggleSwitch
                     value={this.state.inviteUsersToNewRoom}
-                    onChange={this._onInviteUsersToggle}
-                    label={_t("Automatically invite users")} />
+                    onChange={this.onInviteUsersToggle}
+                    label={_t("Automatically invite members from this room to the new one")} />
             );
         }
 
-        const title = this.state.isPrivate ? _t("Upgrade private room") : _t("Upgrade public room");
+        const title = this.isPrivate ? _t("Upgrade private room") : _t("Upgrade public room");
 
         let bugReports = (
             <p>
@@ -101,7 +110,7 @@ export default class RoomUpgradeWarningDialog extends React.Component {
                         },
                         {
                             "a": (sub) => {
-                                return <a href='#' onClick={this._openBugReportDialog}>{ sub }</a>;
+                                return <a href='#' onClick={this.openBugReportDialog}>{ sub }</a>;
                             },
                         },
                     ) }
@@ -119,18 +128,26 @@ export default class RoomUpgradeWarningDialog extends React.Component {
             >
                 <div>
                     <p>
-                        { _t(
+                        { this.props.description || _t(
                             "Upgrading a room is an advanced action and is usually recommended when a room " +
                             "is unstable due to bugs, missing features or security vulnerabilities.",
                         ) }
                     </p>
+                    <p>
+                        { _t(
+                            "<b>Please note upgrading will make a new version of the room</b>. " +
+                            "All current messages will stay in this archived room.", {}, {
+                                b: sub => <b>{ sub }</b>,
+                            },
+                        ) }
+                    </p>
                     { bugReports }
                     <p>
                         { _t(
                             "You'll upgrade this room from <oldVersion /> to <newVersion />.",
                             {},
                             {
-                                oldVersion: () => <code>{ this.state.currentVersion }</code>,
+                                oldVersion: () => <code>{ this.currentVersion }</code>,
                                 newVersion: () => <code>{ this.props.targetVersion }</code>,
                             },
                         ) }
@@ -139,9 +156,9 @@ export default class RoomUpgradeWarningDialog extends React.Component {
                 </div>
                 <DialogButtons
                     primaryButton={_t("Upgrade")}
-                    onPrimaryButtonClick={this._onContinue}
+                    onPrimaryButtonClick={this.onContinue}
                     cancelButton={_t("Cancel")}
-                    onCancel={this._onCancel}
+                    onCancel={this.onCancel}
                 />
             </BaseDialog>
         );

src/components/views/dialogs/SessionRestoreErrorDialog.js

@@ -85,7 +85,9 @@ export default class SessionRestoreErrorDialog extends React.Component {
         }
 
         return (
-            <BaseDialog className="mx_ErrorDialog" onFinished={this.props.onFinished}
+            <BaseDialog
+                className="mx_ErrorDialog"
+                onFinished={this.props.onFinished}
                 title={_t('Unable to restore session')}
                 contentId='mx_Dialog_content'
                 hasCancel={false}

src/components/views/dialogs/ShareDialog.tsx

@@ -158,7 +158,7 @@ export default class ShareDialog extends React.PureComponent<IProps, IState> {
             if (this.state.linkSpecificEvent) {
                 matrixToUrl = this.props.permalinkCreator.forEvent(this.props.target.getId());
             } else {
-                matrixToUrl = this.props.permalinkCreator.forRoom();
+                matrixToUrl = this.props.permalinkCreator.forShareableRoom();
             }
         }
         return matrixToUrl;

src/components/views/dialogs/SpaceSettingsDialog.tsx

@@ -29,10 +29,12 @@ import SpaceSettingsVisibilityTab from "../spaces/SpaceSettingsVisibilityTab";
 import SettingsStore from "../../../settings/SettingsStore";
 import { UIFeature } from "../../../settings/UIFeature";
 import AdvancedRoomSettingsTab from "../settings/tabs/room/AdvancedRoomSettingsTab";
+import RolesRoomSettingsTab from "../settings/tabs/room/RolesRoomSettingsTab";
 
 export enum SpaceSettingsTab {
     General = "SPACE_GENERAL_TAB",
     Visibility = "SPACE_VISIBILITY_TAB",
+    Roles = "SPACE_ROLES_TAB",
     Advanced = "SPACE_ADVANCED_TAB",
 }
 
@@ -60,7 +62,13 @@ const SpaceSettingsDialog: React.FC<IProps> = ({ matrixClient: cli, space, onFin
                 SpaceSettingsTab.Visibility,
                 _td("Visibility"),
                 "mx_SpaceSettingsDialog_visibilityIcon",
-                <SpaceSettingsVisibilityTab matrixClient={cli} space={space} />,
+                <SpaceSettingsVisibilityTab matrixClient={cli} space={space} closeSettingsFn={onFinished} />,
+            ),
+            new Tab(
+                SpaceSettingsTab.Roles,
+                _td("Roles & Permissions"),
+                "mx_RoomSettingsDialog_rolesIcon",
+                <RolesRoomSettingsTab roomId={space.roomId} />,
             ),
             SettingsStore.getValue(UIFeature.AdvancedSettings)
                 ? new Tab(

src/components/views/dialogs/StorageEvictedDialog.js

@@ -54,7 +54,9 @@ export default class StorageEvictedDialog extends React.Component {
         }
 
         return (
-            <BaseDialog className="mx_ErrorDialog" onFinished={this.props.onFinished}
+            <BaseDialog
+                className="mx_ErrorDialog"
+                onFinished={this.props.onFinished}
                 title={_t('Missing session data')}
                 contentId='mx_Dialog_content'
                 hasCancel={false}

src/components/views/dialogs/UserSettingsDialog.tsx

@@ -114,7 +114,7 @@ export default class UserSettingsDialog extends React.Component<IProps, IState>
             UserTab.Preferences,
             _td("Preferences"),
             "mx_UserSettingsDialog_preferencesIcon",
-            <PreferencesUserSettingsTab />,
+            <PreferencesUserSettingsTab closeSettingsFn={this.props.onFinished} />,
         ));
 
         if (SettingsStore.getValue(UIFeature.Voip)) {

src/components/views/dialogs/WidgetCapabilitiesPromptDialog.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2020 The Matrix.org Foundation C.I.C.
+Copyright 2020 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -20,6 +20,7 @@ import { _t } from "../../../languageHandler";
 import { IDialogProps } from "./IDialogProps";
 import {
     Capability,
+    isTimelineCapability,
     Widget,
     WidgetEventCapability,
     WidgetKind,
@@ -30,14 +31,7 @@ import DialogButtons from "../elements/DialogButtons";
 import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
 import { CapabilityText } from "../../../widgets/CapabilityText";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
-
-export function getRememberedCapabilitiesForWidget(widget: Widget): Capability[] {
-    return JSON.parse(localStorage.getItem(`widget_${widget.id}_approved_caps`) || "[]");
-}
-
-function setRememberedCapabilitiesForWidget(widget: Widget, caps: Capability[]) {
-    localStorage.setItem(`widget_${widget.id}_approved_caps`, JSON.stringify(caps));
-}
+import { lexicographicCompare } from "matrix-js-sdk/src/utils";
 
 interface IProps extends IDialogProps {
     requestedCapabilities: Set<Capability>;
@@ -95,14 +89,24 @@ export default class WidgetCapabilitiesPromptDialog extends React.PureComponent<
     };
 
     private closeAndTryRemember(approved: Capability[]) {
-        if (this.state.rememberSelection) {
-            setRememberedCapabilitiesForWidget(this.props.widget, approved);
-        }
-        this.props.onFinished({ approved });
+        this.props.onFinished({ approved, remember: this.state.rememberSelection });
     }
 
     public render() {
-        const checkboxRows = Object.entries(this.state.booleanStates).map(([cap, isChecked], i) => {
+        // We specifically order the timeline capabilities down to the bottom. The capability text
+        // generation cares strongly about this.
+        const orderedCapabilities = Object.entries(this.state.booleanStates).sort(([capA], [capB]) => {
+            const isTimelineA = isTimelineCapability(capA);
+            const isTimelineB = isTimelineCapability(capB);
+
+            if (!isTimelineA && !isTimelineB) return lexicographicCompare(capA, capB);
+            if (isTimelineA && !isTimelineB) return 1;
+            if (!isTimelineA && isTimelineB) return -1;
+            if (isTimelineA && isTimelineB) return lexicographicCompare(capA, capB);
+
+            return 0;
+        });
+        const checkboxRows = orderedCapabilities.map(([cap, isChecked], i) => {
             const text = CapabilityText.for(cap, this.props.widgetKind);
             const byline = text.byline
                 ? <span className="mx_WidgetCapabilitiesPromptDialog_byline">{ text.byline }</span>

src/components/views/dialogs/WidgetOpenIDPermissionsDialog.tsx

@@ -1,5 +1,6 @@
 /*
 Copyright 2019 Travis Ralston
+Copyright 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -15,42 +16,46 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import { _t } from "../../../languageHandler";
-import * as sdk from "../../../index";
 import LabelledToggleSwitch from "../elements/LabelledToggleSwitch";
-import { Widget } from "matrix-widget-api";
+import { Widget, WidgetKind } from "matrix-widget-api";
 import { OIDCState, WidgetPermissionStore } from "../../../stores/widgets/WidgetPermissionStore";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { IDialogProps } from "./IDialogProps";
+import BaseDialog from "./BaseDialog";
+import DialogButtons from "../elements/DialogButtons";
+
+interface IProps extends IDialogProps {
+    widget: Widget;
+    widgetKind: WidgetKind;
+    inRoomId?: string;
+}
+
+interface IState {
+    rememberSelection: boolean;
+}
 
 @replaceableComponent("views.dialogs.WidgetOpenIDPermissionsDialog")
-export default class WidgetOpenIDPermissionsDialog extends React.Component {
-    static propTypes = {
-        onFinished: PropTypes.func.isRequired,
-        widget: PropTypes.objectOf(Widget).isRequired,
-        widgetKind: PropTypes.string.isRequired, // WidgetKind from widget-api
-        inRoomId: PropTypes.string,
-    };
-
-    constructor() {
-        super();
+export default class WidgetOpenIDPermissionsDialog extends React.PureComponent<IProps, IState> {
+    constructor(props: IProps) {
+        super(props);
 
         this.state = {
             rememberSelection: false,
         };
     }
 
-    _onAllow = () => {
-        this._onPermissionSelection(true);
+    private onAllow = () => {
+        this.onPermissionSelection(true);
     };
 
-    _onDeny = () => {
-        this._onPermissionSelection(false);
+    private onDeny = () => {
+        this.onPermissionSelection(false);
     };
 
-    _onPermissionSelection(allowed) {
+    private onPermissionSelection(allowed: boolean) {
         if (this.state.rememberSelection) {
-            console.log(`Remembering ${this.props.widgetId} as allowed=${allowed} for OpenID`);
+            console.log(`Remembering ${this.props.widget.id} as allowed=${allowed} for OpenID`);
 
             WidgetPermissionStore.instance.setOIDCState(
                 this.props.widget, this.props.widgetKind, this.props.inRoomId,
@@ -61,14 +66,11 @@ export default class WidgetOpenIDPermissionsDialog extends React.Component {
         this.props.onFinished(allowed);
     }
 
-    _onRememberSelectionChange = (newVal) => {
+    private onRememberSelectionChange = (newVal: boolean) => {
         this.setState({ rememberSelection: newVal });
     };
 
-    render() {
-        const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
-        const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
-
+    public render() {
         return (
             <BaseDialog
                 className='mx_WidgetOpenIDPermissionsDialog'
@@ -87,13 +89,13 @@ export default class WidgetOpenIDPermissionsDialog extends React.Component {
                 </div>
                 <DialogButtons
                     primaryButton={_t("Continue")}
-                    onPrimaryButtonClick={this._onAllow}
-                    onCancel={this._onDeny}
+                    onPrimaryButtonClick={this.onAllow}
+                    onCancel={this.onDeny}
                     additive={
                         <LabelledToggleSwitch
                             value={this.state.rememberSelection}
                             toggleInFront={true}
-                            onChange={this._onRememberSelectionChange}
+                            onChange={this.onRememberSelectionChange}
                             label={_t("Remember this")} />}
                 />
             </BaseDialog>

src/components/views/dialogs/security/AccessSecretStorageDialog.tsx

@@ -287,7 +287,8 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
             <div className="mx_AccessSecretStorageDialog_reset">
                 { _t("Forgotten or lost all recovery methods? <a>Reset all</a>", null, {
                     a: (sub) => <a
-                        href="" onClick={this.onResetAllClick}
+                        href=""
+                        onClick={this.onResetAllClick}
                         className="mx_AccessSecretStorageDialog_reset_link">{ sub }</a>,
                 }) }
             </div>

src/components/views/dialogs/security/RestoreKeyBackupDialog.js

@@ -399,7 +399,7 @@ export default class RestoreKeyBackupDialog extends React.PureComponent {
 
             let keyStatus;
             if (this.state.recoveryKey.length === 0) {
-                keyStatus = <div className="mx_RestoreKeyBackupDialog_keyStatus"></div>;
+                keyStatus = <div className="mx_RestoreKeyBackupDialog_keyStatus" />;
             } else if (this.state.recoveryKeyValid) {
                 keyStatus = <div className="mx_RestoreKeyBackupDialog_keyStatus">
                     { "\uD83D\uDC4D " }{ _t("This looks like a valid Security Key!") }

src/components/views/elements/AccessibleButton.tsx

@@ -19,7 +19,7 @@ import React, { ReactHTML } from 'react';
 import { Key } from '../../../Keyboard';
 import classnames from 'classnames';
 
-export type ButtonEvent = React.MouseEvent<Element> | React.KeyboardEvent<Element>;
+export type ButtonEvent = React.MouseEvent<Element> | React.KeyboardEvent<Element> | React.FormEvent<Element>;
 
 /**
  * children: React's magic prop. Represents all children given to the element.
@@ -39,7 +39,7 @@ interface IProps extends React.InputHTMLAttributes<Element> {
     tabIndex?: number;
     disabled?: boolean;
     className?: string;
-    onClick(e?: ButtonEvent): void;
+    onClick(e?: ButtonEvent): void | Promise<void>;
 }
 
 interface IAccessibleButtonProps extends React.InputHTMLAttributes<Element> {
@@ -67,7 +67,9 @@ export default function AccessibleButton({
     ...restProps
 }: IProps) {
     const newProps: IAccessibleButtonProps = restProps;
-    if (!disabled) {
+    if (disabled) {
+        newProps["aria-disabled"] = true;
+    } else {
         newProps.onClick = onClick;
         // We need to consume enter onKeyDown and space onKeyUp
         // otherwise we are risking also activating other keyboard focusable elements
@@ -118,7 +120,7 @@ export default function AccessibleButton({
     );
 
     // React.createElement expects InputHTMLAttributes
-    return React.createElement(element, restProps, children);
+    return React.createElement(element, newProps, children);
 }
 
 AccessibleButton.defaultProps = {

src/components/views/elements/AccessibleTooltipButton.tsx

@@ -25,6 +25,7 @@ import { replaceableComponent } from "../../../utils/replaceableComponent";
 interface ITooltipProps extends React.ComponentProps<typeof AccessibleButton> {
     title: string;
     tooltip?: React.ReactNode;
+    label?: React.ReactNode;
     tooltipClassName?: string;
     forceHide?: boolean;
     yOffset?: number;
@@ -84,7 +85,8 @@ export default class AccessibleTooltipButton extends React.PureComponent<IToolti
                 aria-label={title}
             >
                 { children }
-                { tip }
+                { this.props.label }
+                { (tooltip || title) && tip }
             </AccessibleButton>
         );
     }

src/components/views/elements/AddressTile.tsx

@@ -122,7 +122,7 @@ export default class AddressTile extends React.Component<IProps> {
         let dismiss;
         if (this.props.canDismiss) {
             dismiss = (
-                <div className="mx_AddressTile_dismiss" onClick={this.props.onDismissed} >
+                <div className="mx_AddressTile_dismiss" onClick={this.props.onDismissed}>
                     <img src={require("../../../../res/img/icon-address-delete.svg")} width="9" height="9" />
                 </div>
             );

src/components/views/elements/AppPermission.tsx

@@ -62,10 +62,10 @@ export default class AppPermission extends React.Component<IProps, IState> {
 
         // Set all this into the initial state
         this.state = {
-            ...urlInfo,
-            roomMember,
-            isWrapped: null,
             widgetDomain: null,
+            isWrapped: null,
+            roomMember,
+            ...urlInfo,
         };
     }
 

src/components/views/elements/AppTile.js

@@ -218,6 +218,7 @@ export default class AppTile extends React.Component {
 
         // Delete the widget from the persisted store for good measure.
         PersistedElement.destroyElement(this._persistKey);
+        ActiveWidgetStore.destroyPersistentWidget(this.props.app.id);
 
         if (this._sgWidget) this._sgWidget.stop({ forceDestroy: true });
     }
@@ -307,7 +308,6 @@ export default class AppTile extends React.Component {
                 if (this.iframe) {
                     // Reload iframe
                     this.iframe.src = this._sgWidget.embedUrl;
-                    this.setState({});
                 }
             });
         }
@@ -333,7 +333,7 @@ export default class AppTile extends React.Component {
         // this would only be for content hosted on the same origin as the element client: anything
         // hosted on the same origin as the client will get the same access as if you clicked
         // a link to it.
-        const sandboxFlags = "allow-forms allow-popups allow-popups-to-escape-sandbox "+
+        const sandboxFlags = "allow-forms allow-popups allow-popups-to-escape-sandbox " +
             "allow-same-origin allow-scripts allow-presentation";
 
         // Additional iframe feature pemissions
@@ -443,25 +443,25 @@ export default class AppTile extends React.Component {
         return <React.Fragment>
             <div className={appTileClasses} id={this.props.app.id}>
                 { this.props.showMenubar &&
-                <div className="mx_AppTileMenuBar">
-                    <span className="mx_AppTileMenuBarTitle" style={{ pointerEvents: (this.props.handleMinimisePointerEvents ? 'all' : false) }}>
-                        { this.props.showTitle && this._getTileTitle() }
-                    </span>
-                    <span className="mx_AppTileMenuBarWidgets">
-                        { this.props.showPopout && <AccessibleButton
-                            className="mx_AppTileMenuBar_iconButton mx_AppTileMenuBar_iconButton_popout"
-                            title={_t('Popout widget')}
-                            onClick={this._onPopoutWidgetClick}
-                        /> }
-                        <ContextMenuButton
-                            className="mx_AppTileMenuBar_iconButton mx_AppTileMenuBar_iconButton_menu"
-                            label={_t("Options")}
-                            isExpanded={this.state.menuDisplayed}
-                            inputRef={this._contextMenuButton}
-                            onClick={this._onContextMenuClick}
-                        />
-                    </span>
-                </div> }
+                    <div className="mx_AppTileMenuBar">
+                        <span className="mx_AppTileMenuBarTitle" style={{ pointerEvents: (this.props.handleMinimisePointerEvents ? 'all' : false) }}>
+                            { this.props.showTitle && this._getTileTitle() }
+                        </span>
+                        <span className="mx_AppTileMenuBarWidgets">
+                            { this.props.showPopout && <AccessibleButton
+                                className="mx_AppTileMenuBar_iconButton mx_AppTileMenuBar_iconButton_popout"
+                                title={_t('Popout widget')}
+                                onClick={this._onPopoutWidgetClick}
+                            /> }
+                            <ContextMenuButton
+                                className="mx_AppTileMenuBar_iconButton mx_AppTileMenuBar_iconButton_menu"
+                                label={_t("Options")}
+                                isExpanded={this.state.menuDisplayed}
+                                inputRef={this._contextMenuButton}
+                                onClick={this._onContextMenuClick}
+                            />
+                        </span>
+                    </div> }
                 { appTileBody }
             </div>