Merge branch 'develop' into better-spinners

src/components/views/auth/InteractiveAuthEntryComponents.js

@@ -169,7 +169,7 @@ export class PasswordAuthEntry extends React.Component {
                         { submitButtonOrSpinner }
                     </div>
                 </form>
-            { errorSection }
+                { errorSection }
             </div>
         );
     }
@@ -375,7 +375,7 @@ export class TermsAuthEntry extends React.Component {
         if (this.props.showContinue !== false) {
             // XXX: button classes
             submitButton = <button className="mx_InteractiveAuthEntryComponents_termsSubmit mx_GeneralButton"
-                                   onClick={this._trySubmit} disabled={!allChecked}>{_t("Accept")}</button>;
+                onClick={this._trySubmit} disabled={!allChecked}>{_t("Accept")}</button>;
         }
 
         return (

src/components/views/avatars/BaseAvatar.tsx

@@ -179,7 +179,7 @@ const BaseAvatar = (props: IProps) => {
                     width: toPx(width),
                     height: toPx(height),
                 }}
-                title={title} alt=""
+                title={title} alt={_t("Avatar")}
                 inputRef={inputRef}
                 {...otherProps} />
         );

src/components/views/avatars/DecoratedRoomAvatar.tsx

@@ -20,7 +20,6 @@ import { Room } from "matrix-js-sdk/src/models/room";
 import { User } from "matrix-js-sdk/src/models/user";
 import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 
-import { TagID } from '../../../stores/room-list/models';
 import RoomAvatar from "./RoomAvatar";
 import NotificationBadge from '../rooms/NotificationBadge';
 import { RoomNotificationStateStore } from "../../../stores/notifications/RoomNotificationStateStore";
@@ -35,7 +34,6 @@ import {replaceableComponent} from "../../../utils/replaceableComponent";
 interface IProps {
     room: Room;
     avatarSize: number;
-    tag: TagID;
     displayBadge?: boolean;
     forceCount?: boolean;
     oobData?: object;

src/components/views/avatars/MemberAvatar.tsx

@@ -68,8 +68,8 @@ export default class MemberAvatar extends React.Component<IProps, IState> {
             let imageUrl = null;
             if (props.member.getMxcAvatarUrl()) {
                 imageUrl = mediaFromMxc(props.member.getMxcAvatarUrl()).getThumbnailOfSourceHttp(
-                    Math.floor(props.width * window.devicePixelRatio),
-                    Math.floor(props.height * window.devicePixelRatio),
+                    props.width,
+                    props.height,
                     props.resizeMethod,
                 );
             }

src/components/views/avatars/RoomAvatar.tsx

@@ -93,8 +93,8 @@ export default class RoomAvatar extends React.Component<IProps, IState> {
         let oobAvatar = null;
         if (props.oobData.avatarUrl) {
             oobAvatar = mediaFromMxc(props.oobData.avatarUrl).getThumbnailOfSourceHttp(
-                Math.floor(props.width * window.devicePixelRatio),
-                Math.floor(props.height * window.devicePixelRatio),
+                props.width,
+                props.height,
                 props.resizeMethod,
             );
         }
@@ -109,12 +109,7 @@ export default class RoomAvatar extends React.Component<IProps, IState> {
     private static getRoomAvatarUrl(props: IProps): string {
         if (!props.room) return null;
 
-        return Avatar.avatarUrlForRoom(
-            props.room,
-            Math.floor(props.width * window.devicePixelRatio),
-            Math.floor(props.height * window.devicePixelRatio),
-            props.resizeMethod,
-        );
+        return Avatar.avatarUrlForRoom(props.room, props.width, props.height, props.resizeMethod);
     }
 
     private onRoomAvatarClick = () => {

src/components/views/beta/BetaCard.tsx

@@ -0,0 +1,108 @@
+/*
+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 classNames from "classnames";
+
+import {_t} from "../../../languageHandler";
+import AccessibleButton from "../elements/AccessibleButton";
+import SettingsStore from "../../../settings/SettingsStore";
+import {SettingLevel} from "../../../settings/SettingLevel";
+import TextWithTooltip from "../elements/TextWithTooltip";
+import Modal from "../../../Modal";
+import BetaFeedbackDialog from "../dialogs/BetaFeedbackDialog";
+import SdkConfig from "../../../SdkConfig";
+
+interface IProps {
+    title?: string;
+    featureId: string;
+}
+
+export const BetaPill = ({ onClick }: { onClick?: () => void }) => {
+    if (onClick) {
+        return <TextWithTooltip
+            class={classNames("mx_BetaCard_betaPill", {
+                mx_BetaCard_betaPill_clickable: !!onClick,
+            })}
+            tooltip={<div>
+                <div className="mx_Tooltip_title">
+                    { _t("Spaces is a beta feature") }
+                </div>
+                <div className="mx_Tooltip_sub">
+                    { _t("Tap for more info") }
+                </div>
+            </div>}
+            onClick={onClick}
+            tooltipProps={{ yOffset: -10 }}
+        >
+            { _t("Beta") }
+        </TextWithTooltip>;
+    }
+
+    return <span
+        className={classNames("mx_BetaCard_betaPill", {
+            mx_BetaCard_betaPill_clickable: !!onClick,
+        })}
+        onClick={onClick}
+    >
+        { _t("Beta") }
+    </span>;
+};
+
+const BetaCard = ({ title: titleOverride, featureId }: IProps) => {
+    const info = SettingsStore.getBetaInfo(featureId);
+    if (!info) return null; // Beta is invalid/disabled
+
+    const { title, caption, disclaimer, image, feedbackLabel, feedbackSubheading } = info;
+    const value = SettingsStore.getValue(featureId);
+
+    let feedbackButton;
+    if (value && feedbackLabel && feedbackSubheading && SdkConfig.get().bug_report_endpoint_url) {
+        feedbackButton = <AccessibleButton
+            onClick={() => {
+                Modal.createTrackedDialog("Beta Feedback", featureId, BetaFeedbackDialog, { featureId });
+            }}
+            kind="primary"
+        >
+            { _t("Feedback") }
+        </AccessibleButton>;
+    }
+
+    return <div className="mx_BetaCard">
+        <div>
+            <h3 className="mx_BetaCard_title">
+                { titleOverride || _t(title) }
+                <BetaPill />
+            </h3>
+            <span className="mx_BetaCard_caption">{ _t(caption) }</span>
+            <div>
+                { feedbackButton }
+                <AccessibleButton
+                    onClick={() => SettingsStore.setValue(featureId, null, SettingLevel.DEVICE, !value)}
+                    kind={feedbackButton ? "primary_outline" : "primary"}
+                >
+                    { value ? _t("Leave the beta") : _t("Join the beta") }
+                </AccessibleButton>
+            </div>
+            { disclaimer && <div className="mx_BetaCard_disclaimer">
+                { disclaimer(value) }
+            </div> }
+        </div>
+        <img src={image} alt="" />
+    </div>;
+};
+
+export default BetaCard;

src/components/views/context_menus/MessageContextMenu.js

@@ -78,8 +78,10 @@ export default class MessageContextMenu extends React.Component {
 
         // We explicitly decline to show the redact option on ACL events as it has a potential
         // to obliterate the room - https://github.com/matrix-org/synapse/issues/4042
+        // Similarly for encryption events, since redacting them "breaks everything"
         const canRedact = room.currentState.maySendRedactionForEvent(this.props.mxEvent, cli.credentials.userId)
-            && this.props.mxEvent.getType() !== EventType.RoomServerAcl;
+            && this.props.mxEvent.getType() !== EventType.RoomServerAcl
+            && this.props.mxEvent.getType() !== EventType.RoomEncryption;
         let canPin = room.currentState.mayClientSendStateEvent('m.room.pinned_events', cli);
 
         // HACK: Intentionally say we can't pin if the user doesn't want to use the functionality
@@ -350,7 +352,7 @@ export default class MessageContextMenu extends React.Component {
                 >
                     { _t('Source URL') }
                 </MenuItem>
-          );
+            );
         }
 
         if (this.props.collapseReplyThread) {

src/components/views/dialogs/AddExistingToSpaceDialog.tsx

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, {useState} from "react";
+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";
@@ -29,10 +29,15 @@ import RoomAvatar from "../avatars/RoomAvatar";
 import {getDisplayAliasForRoom} from "../../../Rooms";
 import AccessibleButton from "../elements/AccessibleButton";
 import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
-import {allSettled} from "../../../utils/promise";
+import {sleep} from "../../../utils/promise";
 import DMRoomMap from "../../../utils/DMRoomMap";
 import {calculateRoomVia} from "../../../utils/permalinks/Permalinks";
 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";
 
 interface IProps extends IDialogProps {
     matrixClient: MatrixClient;
@@ -41,45 +46,231 @@ interface IProps extends IDialogProps {
 }
 
 const Entry = ({ room, checked, onChange }) => {
-    return <label className="mx_AddExistingToSpaceDialog_entry">
-        <RoomAvatar room={room} height={32} width={32} />
-        <span className="mx_AddExistingToSpaceDialog_entry_name">{ room.name }</span>
-        <StyledCheckbox onChange={(e) => onChange(e.target.checked)} checked={checked} />
+    return <label className="mx_AddExistingToSpace_entry">
+        { room?.isSpaceRoom()
+            ? <RoomAvatar room={room} height={32} width={32} />
+            : <DecoratedRoomAvatar room={room} avatarSize={32} />
+        }
+        <span className="mx_AddExistingToSpace_entry_name">{ room.name }</span>
+        <StyledCheckbox
+            onChange={onChange ? (e) => onChange(e.target.checked) : null}
+            checked={checked}
+            disabled={!onChange}
+        />
     </label>;
 };
 
-const AddExistingToSpaceDialog: React.FC<IProps> = ({ matrixClient: cli, space, onCreateRoomClick, onFinished }) => {
+interface IAddExistingToSpaceProps {
+    space: Room;
+    footerPrompt?: ReactNode;
+    emptySelectionButton?: ReactNode;
+    onFinished(added: boolean): void;
+}
+
+export const AddExistingToSpace: React.FC<IAddExistingToSpaceProps> = ({
+    space,
+    footerPrompt,
+    emptySelectionButton,
+    onFinished,
+}) => {
+    const cli = useContext(MatrixClientContext);
+    const visibleRooms = useMemo(() => sortRooms(cli.getVisibleRooms()), [cli]);
+
+    const [selectedToAdd, setSelectedToAdd] = useState(new Set<Room>());
+    const [progress, setProgress] = useState<number>(null);
+    const [error, setError] = useState<Error>(null);
     const [query, setQuery] = useState("");
     const lcQuery = query.toLowerCase();
 
-    const [selectedSpace, setSelectedSpace] = useState(space);
-    const [selectedToAdd, setSelectedToAdd] = useState(new Set<Room>());
-
     const existingSubspaces = SpaceStore.instance.getChildSpaces(space.roomId);
     const existingSubspacesSet = new Set(existingSubspaces);
     const existingRoomsSet = new Set(SpaceStore.instance.getChildRooms(space.roomId));
 
-    const joinRule = selectedSpace.getJoinRule();
-    const [spaces, rooms, dms] = cli.getVisibleRooms().reduce((arr, room) => {
+    const joinRule = space.getJoinRule();
+    const [spaces, rooms, dms] = visibleRooms.reduce((arr, room) => {
         if (room.getMyMembership() !== "join") return arr;
         if (!room.name.toLowerCase().includes(lcQuery)) return arr;
 
         if (room.isSpaceRoom()) {
-            if (room !== space && room !== selectedSpace && !existingSubspacesSet.has(room)) {
+            if (room !== space && !existingSubspacesSet.has(room)) {
                 arr[0].push(room);
             }
-        } else if (!existingRoomsSet.has(room) && joinRule !== "public") {
-            // Only show DMs for non-public spaces as they make very little sense in spaces other than "Just Me" ones.
-            arr[DMRoomMap.shared().getUserIdForRoomId(room.roomId) ? 2 : 1].push(room);
+        } else if (!existingRoomsSet.has(room)) {
+            if (!DMRoomMap.shared().getUserIdForRoomId(room.roomId)) {
+                arr[1].push(room);
+            } else if (joinRule !== "public") {
+                // Only show DMs for non-public spaces as they make very little sense in spaces other than "Just Me" ones.
+                arr[2].push(room);
+            }
         }
         return arr;
     }, [[], [], []]);
 
-    const [busy, setBusy] = useState(false);
-    const [error, setError] = useState("");
+    const addRooms = async () => {
+        setError(null);
+        setProgress(0);
+
+        let error;
+
+        for (const room of selectedToAdd) {
+            const via = calculateRoomVia(room);
+            try {
+                await SpaceStore.instance.addRoomToSpace(space, room.roomId, via).catch(async e => {
+                    if (e.errcode === "M_LIMIT_EXCEEDED") {
+                        await sleep(e.data.retry_after_ms);
+                        return SpaceStore.instance.addRoomToSpace(space, room.roomId, via); // retry
+                    }
+
+                    throw e;
+                });
+                setProgress(i => i + 1);
+            } catch (e) {
+                console.error("Failed to add rooms to space", e);
+                setError(error = e);
+                break;
+            }
+        }
+
+        if (!error) {
+            onFinished(true);
+        }
+    };
+
+    const busy = progress !== null;
+
+    let footer;
+    if (error) {
+        footer = <>
+            <img
+                src={require("../../../../res/img/element-icons/warning-badge.svg")}
+                height="24"
+                width="24"
+                alt=""
+            />
+
+            <span className="mx_AddExistingToSpaceDialog_error">
+                <div className="mx_AddExistingToSpaceDialog_errorHeading">{ _t("Not all selected were added") }</div>
+                <div className="mx_AddExistingToSpaceDialog_errorCaption">{ _t("Try again") }</div>
+            </span>
+
+            <AccessibleButton className="mx_AddExistingToSpaceDialog_retryButton" onClick={addRooms}>
+                { _t("Retry") }
+            </AccessibleButton>
+        </>;
+    } else if (busy) {
+        footer = <span>
+            <ProgressBar value={progress} max={selectedToAdd.size} />
+            <div className="mx_AddExistingToSpaceDialog_progressText">
+                { _t("Adding rooms... (%(progress)s out of %(count)s)", {
+                    count: selectedToAdd.size,
+                    progress,
+                }) }
+            </div>
+        </span>;
+    } else {
+        let button = emptySelectionButton;
+        if (!button || selectedToAdd.size > 0) {
+            button = <AccessibleButton kind="primary" disabled={selectedToAdd.size < 1} onClick={addRooms}>
+                { _t("Add") }
+            </AccessibleButton>;
+        }
+
+        footer = <>
+            <span>
+                { footerPrompt }
+            </span>
+
+            { button }
+        </>;
+    }
+
+    const onChange = !busy && !error ? (checked, room) => {
+        if (checked) {
+            selectedToAdd.add(room);
+        } else {
+            selectedToAdd.delete(room);
+        }
+        setSelectedToAdd(new Set(selectedToAdd));
+    } : null;
+
+    return <div className="mx_AddExistingToSpace">
+        <SearchBox
+            className="mx_textinput_icon mx_textinput_search"
+            placeholder={ _t("Filter your rooms and spaces") }
+            onSearch={setQuery}
+            autoComplete={true}
+            autoFocus={true}
+        />
+        <AutoHideScrollbar className="mx_AddExistingToSpace_content" id="mx_AddExistingToSpace">
+            { rooms.length > 0 ? (
+                <div className="mx_AddExistingToSpace_section">
+                    <h3>{ _t("Rooms") }</h3>
+                    { rooms.map(room => {
+                        return <Entry
+                            key={room.roomId}
+                            room={room}
+                            checked={selectedToAdd.has(room)}
+                            onChange={onChange ? (checked) => {
+                                onChange(checked, room);
+                            } : null}
+                        />;
+                    }) }
+                </div>
+            ) : 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>
+            ) : 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>
+            ) : null }
+
+            { spaces.length + rooms.length + dms.length < 1 ? <span className="mx_AddExistingToSpace_noResults">
+                { _t("No results") }
+            </span> : undefined }
+        </AutoHideScrollbar>
+
+        <div className="mx_AddExistingToSpace_footer">
+            { footer }
+        </div>
+    </div>;
+};
+
+const AddExistingToSpaceDialog: React.FC<IProps> = ({ matrixClient: cli, space, onCreateRoomClick, onFinished }) => {
+    const [selectedSpace, setSelectedSpace] = useState(space);
+    const existingSubspaces = SpaceStore.instance.getChildSpaces(space.roomId);
 
     let spaceOptionSection;
-    if (existingSubspacesSet.size > 0) {
+    if (existingSubspaces.length > 0) {
         const options = [space, ...existingSubspaces].map((space) => {
             const classes = classNames("mx_AddExistingToSpaceDialog_dropdownOption", {
                 mx_AddExistingToSpaceDialog_dropdownOptionActive: space === selectedSpace,
@@ -119,115 +310,24 @@ const AddExistingToSpaceDialog: React.FC<IProps> = ({ matrixClient: cli, space,
     return <BaseDialog
         title={title}
         className="mx_AddExistingToSpaceDialog"
-        contentId="mx_AddExistingToSpaceDialog"
+        contentId="mx_AddExistingToSpace"
         onFinished={onFinished}
         fixedWidth={false}
     >
-        { error && <div className="mx_AddExistingToSpaceDialog_errorText">{ error }</div> }
+        <MatrixClientContext.Provider value={cli}>
+            <AddExistingToSpace
+                space={space}
+                onFinished={onFinished}
+                footerPrompt={<>
+                    <div>{ _t("Want to add a new room instead?") }</div>
+                    <AccessibleButton onClick={() => onCreateRoomClick(cli, space)} kind="link">
+                        { _t("Create a new room") }
+                    </AccessibleButton>
+                </>}
+            />
+        </MatrixClientContext.Provider>
 
-        <SearchBox
-            className="mx_textinput_icon mx_textinput_search"
-            placeholder={ _t("Filter your rooms and spaces") }
-            onSearch={setQuery}
-            autoComplete={true}
-            autoFocus={true}
-        />
-        <AutoHideScrollbar className="mx_AddExistingToSpaceDialog_content" id="mx_AddExistingToSpaceDialog">
-            { rooms.length > 0 ? (
-                <div className="mx_AddExistingToSpaceDialog_section">
-                    <h3>{ _t("Rooms") }</h3>
-                    { rooms.map(room => {
-                        return <Entry
-                            key={room.roomId}
-                            room={room}
-                            checked={selectedToAdd.has(room)}
-                            onChange={(checked) => {
-                                if (checked) {
-                                    selectedToAdd.add(room);
-                                } else {
-                                    selectedToAdd.delete(room);
-                                }
-                                setSelectedToAdd(new Set(selectedToAdd));
-                            }}
-                        />;
-                    }) }
-                </div>
-            ) : undefined }
-
-            { spaces.length > 0 ? (
-                <div className="mx_AddExistingToSpaceDialog_section mx_AddExistingToSpaceDialog_section_spaces">
-                    <h3>{ _t("Spaces") }</h3>
-                    { spaces.map(space => {
-                        return <Entry
-                            key={space.roomId}
-                            room={space}
-                            checked={selectedToAdd.has(space)}
-                            onChange={(checked) => {
-                                if (checked) {
-                                    selectedToAdd.add(space);
-                                } else {
-                                    selectedToAdd.delete(space);
-                                }
-                                setSelectedToAdd(new Set(selectedToAdd));
-                            }}
-                        />;
-                    }) }
-                </div>
-            ) : null }
-
-            { dms.length > 0 ? (
-                <div className="mx_AddExistingToSpaceDialog_section">
-                    <h3>{ _t("Direct Messages") }</h3>
-                    { dms.map(space => {
-                        return <Entry
-                            key={space.roomId}
-                            room={space}
-                            checked={selectedToAdd.has(space)}
-                            onChange={(checked) => {
-                                if (checked) {
-                                    selectedToAdd.add(space);
-                                } else {
-                                    selectedToAdd.delete(space);
-                                }
-                                setSelectedToAdd(new Set(selectedToAdd));
-                            }}
-                        />;
-                    }) }
-                </div>
-            ) : null }
-
-            { spaces.length + rooms.length + dms.length < 1 ? <span className="mx_AddExistingToSpaceDialog_noResults">
-                { _t("No results") }
-            </span> : undefined }
-        </AutoHideScrollbar>
-
-        <div className="mx_AddExistingToSpaceDialog_footer">
-            <span>
-                <div>{ _t("Don't want to add an existing room?") }</div>
-                <AccessibleButton onClick={() => onCreateRoomClick(cli, space)} kind="link">
-                    { _t("Create a new room") }
-                </AccessibleButton>
-            </span>
-
-            <AccessibleButton
-                kind="primary"
-                disabled={busy || selectedToAdd.size < 1}
-                onClick={async () => {
-                    setBusy(true);
-                    try {
-                        await allSettled(Array.from(selectedToAdd).map((room) =>
-                            SpaceStore.instance.addRoomToSpace(space, room.roomId, calculateRoomVia(room))));
-                        onFinished(true);
-                    } catch (e) {
-                        console.error("Failed to add rooms to space", e);
-                        setError(_t("Failed to add rooms to space"));
-                    }
-                    setBusy(false);
-                }}
-            >
-                { busy ? _t("Adding...") : _t("Add") }
-            </AccessibleButton>
-        </div>
+        <SpaceFeedbackPrompt onClick={() => onFinished(false)} />
     </BaseDialog>;
 };
 

src/components/views/dialogs/BetaFeedbackDialog.tsx

@@ -0,0 +1,106 @@
+/*
+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 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 {USER_LABS_TAB} from "./UserSettingsDialog";
+
+interface IProps extends IDialogProps {
+    featureId: string;
+}
+
+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);
+
+        submitFeedback(SdkConfig.get().bug_report_endpoint_url, info.feedbackLabel, comment, canContact);
+        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}
+        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: USER_LABS_TAB,
+                    });
+                }}>
+                    { _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}
+    />);
+};
+
+export default BetaFeedbackDialog;

src/components/views/dialogs/BugReportDialog.js

@@ -184,7 +184,7 @@ export default class BugReportDialog extends React.Component {
 
         return (
             <BaseDialog className="mx_BugReportDialog" onFinished={this._onCancel}
-                    title={_t('Submit debug logs')}
+                title={_t('Submit debug logs')}
                 contentId='mx_Dialog_content'
             >
                 <div className="mx_Dialog_content" id='mx_Dialog_content'>

src/components/views/dialogs/ChangelogDialog.js

@@ -95,7 +95,7 @@ export default class ChangelogDialog extends React.Component {
                 description={content}
                 button={_t("Update")}
                 onFinished={this.props.onFinished}
-                />
+            />
         );
     }
 }

src/components/views/dialogs/ConfirmWipeDeviceDialog.js

@@ -39,9 +39,12 @@ export default class ConfirmWipeDeviceDialog extends React.Component {
         const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
         return (
-            <BaseDialog className='mx_ConfirmWipeDeviceDialog' hasCancel={true}
-                        onFinished={this.props.onFinished}
-                        title={_t("Clear all data in this session?")}>
+            <BaseDialog
+                className='mx_ConfirmWipeDeviceDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Clear all data in this session?")}
+            >
                 <div className='mx_ConfirmWipeDeviceDialog_content'>
                     <p>
                         {_t(

src/components/views/dialogs/DevtoolsDialog.js

@@ -70,8 +70,16 @@ class GenericEditor extends React.PureComponent {
     }
 
     textInput(id, label) {
-        return <Field id={id} label={label} size="42" autoFocus={true} type="text" autoComplete="on"
-                      value={this.state[id]} onChange={this._onChange} />;
+        return <Field
+            id={id}
+            label={label}
+            size="42"
+            autoFocus={true}
+            type="text"
+            autoComplete="on"
+            value={this.state[id]}
+            onChange={this._onChange}
+        />;
     }
 }
 
@@ -155,7 +163,7 @@ export class SendCustomEvent extends GenericEditor {
                 <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" />
+                    autoComplete="off" value={this.state.evContent} onChange={this._onChange} element="textarea" />
             </div>
             <div className="mx_Dialog_buttons">
                 <button onClick={this.onBack}>{ _t('Back') }</button>
@@ -239,7 +247,7 @@ class SendAccountData extends GenericEditor {
                 <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" />
+                    autoComplete="off" value={this.state.evContent} onChange={this._onChange} element="textarea" />
             </div>
             <div className="mx_Dialog_buttons">
                 <button onClick={this.onBack}>{ _t('Back') }</button>
@@ -315,15 +323,15 @@ class FilteredList extends React.PureComponent {
         const TruncatedList = sdk.getComponent("elements.TruncatedList");
         return <div>
             <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 : ''} />
+                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 : ''} />
 
             <TruncatedList getChildren={this.getChildren}
-                           getChildCount={this.getChildCount}
-                           truncateAt={this.state.truncateAt}
-                           createOverflowElement={this.createOverflowElement} />
+                getChildCount={this.getChildCount}
+                truncateAt={this.state.truncateAt}
+                createOverflowElement={this.createOverflowElement} />
         </div>;
     }
 }
@@ -647,7 +655,7 @@ function VerificationRequest({txnId, request}) {
 
         /* Note that request.timeout is a getter, so its value changes */
         const id = setInterval(() => {
-           setRequestTimeout(request.timeout);
+            setRequestTimeout(request.timeout);
         }, 500);
 
         return () => { clearInterval(id); };
@@ -941,35 +949,35 @@ class SettingsExplorer extends React.Component {
                         />
                         <table>
                             <thead>
-                            <tr>
-                                <th>{_t("Setting ID")}</th>
-                                <th>{_t("Value")}</th>
-                                <th>{_t("Value in this room")}</th>
-                            </tr>
+                                <tr>
+                                    <th>{_t("Setting ID")}</th>
+                                    <th>{_t("Value")}</th>
+                                    <th>{_t("Value in this room")}</th>
+                                </tr>
                             </thead>
                             <tbody>
-                            {allSettings.map(i => (
-                                <tr key={i}>
-                                    <td>
-                                        <a href="" onClick={(e) => this.onViewClick(e, i)}>
-                                            <code>{i}</code>
-                                        </a>
-                                        <a href="" onClick={(e) => this.onEditClick(e, i)}
-                                           className='mx_DevTools_SettingsExplorer_edit'
-                                        >
+                                {allSettings.map(i => (
+                                    <tr key={i}>
+                                        <td>
+                                            <a href="" onClick={(e) => this.onViewClick(e, i)}>
+                                                <code>{i}</code>
+                                            </a>
+                                            <a href="" onClick={(e) => this.onEditClick(e, i)}
+                                                className='mx_DevTools_SettingsExplorer_edit'
+                                            >
                                             ✏
-                                        </a>
-                                    </td>
-                                    <td>
-                                        <code>{this.renderSettingValue(SettingsStore.getValue(i))}</code>
-                                    </td>
-                                    <td>
-                                        <code>
-                                            {this.renderSettingValue(SettingsStore.getValue(i, room.roomId))}
-                                        </code>
-                                    </td>
-                                </tr>
-                            ))}
+                                            </a>
+                                        </td>
+                                        <td>
+                                            <code>{this.renderSettingValue(SettingsStore.getValue(i))}</code>
+                                        </td>
+                                        <td>
+                                            <code>
+                                                {this.renderSettingValue(SettingsStore.getValue(i, room.roomId))}
+                                            </code>
+                                        </td>
+                                    </tr>
+                                ))}
                             </tbody>
                         </table>
                     </div>
@@ -998,11 +1006,11 @@ class SettingsExplorer extends React.Component {
                         <div>
                             <table>
                                 <thead>
-                                <tr>
-                                    <th>{_t("Level")}</th>
-                                    <th>{_t("Settable at global")}</th>
-                                    <th>{_t("Settable at room")}</th>
-                                </tr>
+                                    <tr>
+                                        <th>{_t("Level")}</th>
+                                        <th>{_t("Settable at global")}</th>
+                                        <th>{_t("Settable at room")}</th>
+                                    </tr>
                                 </thead>
                                 <tbody>
                                     {LEVEL_ORDER.map(lvl => (

src/components/views/dialogs/IncomingSasDialog.js

@@ -130,7 +130,7 @@ export default class IncomingSasDialog extends React.Component {
         const oppProfile = this.state.opponentProfile;
         if (oppProfile) {
             const url = oppProfile.avatar_url
-                ? mediaFromMxc(oppProfile.avatar_url).getSquareThumbnailHttp(Math.floor(48 * window.devicePixelRatio))
+                ? mediaFromMxc(oppProfile.avatar_url).getSquareThumbnailHttp(48)
                 : null;
             profile = <div className="mx_IncomingSasDialog_opponentProfile">
                 <BaseAvatar name={oppProfile.displayname}

src/components/views/dialogs/IntegrationsDisabledDialog.js

@@ -42,9 +42,12 @@ export default class IntegrationsDisabledDialog extends React.Component {
         const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
         return (
-            <BaseDialog className='mx_IntegrationsDisabledDialog' hasCancel={true}
-                        onFinished={this.props.onFinished}
-                        title={_t("Integrations are disabled")}>
+            <BaseDialog
+                className='mx_IntegrationsDisabledDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Integrations are disabled")}
+            >
                 <div className='mx_IntegrationsDisabledDialog_content'>
                     <p>{_t("Enable 'Manage Integrations' in Settings to do this.")}</p>
                 </div>

src/components/views/dialogs/IntegrationsImpossibleDialog.js

@@ -37,9 +37,12 @@ export default class IntegrationsImpossibleDialog extends React.Component {
         const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
         return (
-            <BaseDialog className='mx_IntegrationsImpossibleDialog' hasCancel={false}
-                        onFinished={this.props.onFinished}
-                        title={_t("Integrations not allowed")}>
+            <BaseDialog
+                className='mx_IntegrationsImpossibleDialog'
+                hasCancel={false}
+                onFinished={this.props.onFinished}
+                title={_t("Integrations not allowed")}
+            >
                 <div className='mx_IntegrationsImpossibleDialog_content'>
                     <p>
                         {_t(

src/components/views/dialogs/InviteDialog.tsx

@@ -1312,7 +1312,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             goButtonFn = this._startDm;
         } else if (this.props.kind === KIND_INVITE) {
             const room = MatrixClientPeg.get()?.getRoom(this.props.roomId);
-            const isSpace = room?.isSpaceRoom();
+            const isSpace = SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom();
             title = isSpace
                 ? _t("Invite to %(spaceName)s", {
                     spaceName: room.name || _t("Unnamed Space"),

src/components/views/dialogs/KeySignatureUploadFailedDialog.js

@@ -24,7 +24,7 @@ export default function KeySignatureUploadFailedDialog({
         source,
         continuation,
         onFinished,
-    }) {
+}) {
     const RETRIES = 2;
     const BaseDialog = sdk.getComponent('dialogs.BaseDialog');
     const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
@@ -84,10 +84,10 @@ export default function KeySignatureUploadFailedDialog({
     } else {
         body = (<div>
             {success ?
-              <span>{_t("Upload completed")}</span> :
-              cancelled ?
-                <span>{_t("Cancelled signature upload")}</span> :
-                <span>{_t("Unable to upload")}</span>}
+                <span>{_t("Upload completed")}</span> :
+                cancelled ?
+                    <span>{_t("Cancelled signature upload")}</span> :
+                    <span>{_t("Unable to upload")}</span>}
             <DialogButtons
                 primaryButton={_t("OK")}
                 hasCancel={false}

src/components/views/dialogs/MessageEditHistoryDialog.js

@@ -164,8 +164,12 @@ export default class MessageEditHistoryDialog extends React.PureComponent {
         }
         const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
         return (
-            <BaseDialog className='mx_MessageEditHistoryDialog' hasCancel={true}
-                        onFinished={this.props.onFinished} title={_t("Message edits")}>
+            <BaseDialog
+                className='mx_MessageEditHistoryDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Message edits")}
+            >
                 {content}
             </BaseDialog>
         );

src/components/views/dialogs/RoomSettingsDialog.js

@@ -116,8 +116,12 @@ export default class RoomSettingsDialog extends React.Component {
 
         const roomName = MatrixClientPeg.get().getRoom(this.props.roomId).name;
         return (
-            <BaseDialog className='mx_RoomSettingsDialog' hasCancel={true}
-                        onFinished={this.props.onFinished} title={_t("Room Settings - %(roomName)s", {roomName})}>
+            <BaseDialog
+                className='mx_RoomSettingsDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Room Settings - %(roomName)s", {roomName})}
+            >
                 <div className='mx_SettingsDialog_content'>
                     <TabbedView tabs={this._getTabs()} />
                 </div>

src/components/views/dialogs/ServerPickerDialog.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.
@@ -110,7 +110,7 @@ export default class ServerPickerDialog extends React.PureComponent<IProps, ISta
                 console.error(e);
 
                 const stateForError = AutoDiscoveryUtils.authComponentStateForError(e);
-                if (stateForError.isFatalError) {
+                if (stateForError.serverErrorIsFatal) {
                     let error = _t("Unable to validate homeserver");
                     if (e.translatedMessage) {
                         error = e.translatedMessage;
@@ -168,7 +168,7 @@ export default class ServerPickerDialog extends React.PureComponent<IProps, ISta
             text = _t("Matrix.org is the biggest public homeserver in the world, so it’s a good place for many.");
         }
 
-        let defaultServerName = this.defaultServer.hsName;
+        let defaultServerName: React.ReactNode = this.defaultServer.hsName;
         if (this.defaultServer.hsNameIsDifferent) {
             defaultServerName = (
                 <TextWithTooltip class="mx_Login_underlinedServerName" tooltip={this.defaultServer.hsUrl}>
@@ -217,6 +217,7 @@ export default class ServerPickerDialog extends React.PureComponent<IProps, ISta
                         value={this.state.otherHomeserver}
                         validateOnChange={false}
                         validateOnFocus={false}
+                        id="mx_homeserverInput"
                     />
                 </StyledRadioButton>
                 <p>

src/components/views/dialogs/SessionRestoreErrorDialog.js

@@ -98,7 +98,7 @@ export default class SessionRestoreErrorDialog extends React.Component {
                         "may be incompatible with this version. Close this window and return " +
                         "to the more recent version.",
                         { brand },
-                     ) }</p>
+                    ) }</p>
 
                     <p>{ _t(
                         "Clearing your browser's storage may fix the problem, but will sign you " +

src/components/views/dialogs/SpaceSettingsDialog.tsx

@@ -32,6 +32,7 @@ import Modal from "../../../Modal";
 import defaultDispatcher from "../../../dispatcher/dispatcher";
 import {allSettled} from "../../../utils/promise";
 import {useDispatcher} from "../../../hooks/useDispatcher";
+import {SpaceFeedbackPrompt} from "../../structures/SpaceRoomView";
 
 interface IProps extends IDialogProps {
     matrixClient: MatrixClient;
@@ -111,15 +112,17 @@ const SpaceSettingsDialog: React.FC<IProps> = ({ matrixClient: cli, space, onFin
 
             { error && <div className="mx_SpaceRoomView_errorText">{ error }</div> }
 
+            <SpaceFeedbackPrompt onClick={() => onFinished(false)} />
+
             <SpaceBasicSettings
                 avatarUrl={avatarUrlForRoom(space, 80, 80, "crop")}
-                avatarDisabled={!canSetAvatar}
+                avatarDisabled={busy || !canSetAvatar}
                 setAvatar={setNewAvatar}
                 name={name}
-                nameDisabled={!canSetName}
+                nameDisabled={busy || !canSetName}
                 setName={setName}
                 topic={topic}
-                topicDisabled={!canSetTopic}
+                topicDisabled={busy || !canSetTopic}
                 setTopic={setTopic}
             />
 

src/components/views/dialogs/StorageEvictedDialog.js

@@ -45,10 +45,12 @@ export default class StorageEvictedDialog extends React.Component {
         let logRequest;
         if (SdkConfig.get().bug_report_endpoint_url) {
             logRequest = _t(
-                "To help us prevent this in future, please <a>send us logs</a>.", {},
-            {
-                a: text => <a href="#" onClick={this._sendBugReport}>{text}</a>,
-            });
+                "To help us prevent this in future, please <a>send us logs</a>.",
+                {},
+                {
+                    a: text => <a href="#" onClick={this._sendBugReport}>{text}</a>,
+                },
+            );
         }
 
         return (

src/components/views/dialogs/UntrustedDeviceDialog.tsx

@@ -0,0 +1,73 @@
+/*
+Copyright 2019, 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.
+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 { User } from "matrix-js-sdk/src/models/user";
+
+import { _t } from "../../../languageHandler";
+import { MatrixClientPeg } from "../../../MatrixClientPeg";
+import E2EIcon from "../rooms/E2EIcon";
+import AccessibleButton from "../elements/AccessibleButton";
+import BaseDialog from "./BaseDialog";
+import { IDialogProps } from "./IDialogProps";
+import { IDevice } from "../right_panel/UserInfo";
+
+interface IProps extends IDialogProps {
+    user: User;
+    device: IDevice;
+}
+
+const UntrustedDeviceDialog: React.FC<IProps> = ({device, user, onFinished}) => {
+    let askToVerifyText;
+    let newSessionText;
+
+    if (MatrixClientPeg.get().getUserId() === user.userId) {
+        newSessionText = _t("You signed in to a new session without verifying it:");
+        askToVerifyText = _t("Verify your other session using one of the options below.");
+    } else {
+        newSessionText = _t("%(name)s (%(userId)s) signed in to a new session without verifying it:",
+            {name: user.displayName, userId: user.userId});
+        askToVerifyText = _t("Ask this user to verify their session, or manually verify it below.");
+    }
+
+    return <BaseDialog
+        onFinished={onFinished}
+        className="mx_UntrustedDeviceDialog"
+        title={<>
+            <E2EIcon status="warning" size={24} hideTooltip={true} />
+            { _t("Not Trusted")}
+        </>}
+    >
+        <div className="mx_Dialog_content" id='mx_Dialog_content'>
+            <p>{newSessionText}</p>
+            <p>{device.getDisplayName()} ({device.deviceId})</p>
+            <p>{askToVerifyText}</p>
+        </div>
+        <div className='mx_Dialog_buttons'>
+            <AccessibleButton element="button" kind="secondary" onClick={() => onFinished("legacy")}>
+                { _t("Manually Verify by Text") }
+            </AccessibleButton>
+            <AccessibleButton element="button" kind="secondary" onClick={() => onFinished("sas")}>
+                { _t("Interactively verify by Emoji") }
+            </AccessibleButton>
+            <AccessibleButton kind="primary" onClick={() => onFinished(false)}>
+                { _t("Done") }
+            </AccessibleButton>
+        </div>
+    </BaseDialog>;
+};
+
+export default UntrustedDeviceDialog;

src/components/views/dialogs/UploadConfirmDialog.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd
+Copyright 2019, 2021 The Matrix.org Foundation C.I.C.
 Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
 
 Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,20 +16,23 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import * as sdk from '../../../index';
 import { _t } from '../../../languageHandler';
 import filesize from "filesize";
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { getBlobSafeMimeType } from '../../../utils/blobs';
+
+interface IProps {
+    file: File;
+    currentIndex: number;
+    totalFiles?: number;
+    onFinished: (uploadConfirmed: boolean, uploadAll?: boolean) => void;
+}
 
 @replaceableComponent("views.dialogs.UploadConfirmDialog")
-export default class UploadConfirmDialog extends React.Component {
-    static propTypes = {
-        file: PropTypes.object.isRequired,
-        currentIndex: PropTypes.number,
-        totalFiles: PropTypes.number,
-        onFinished: PropTypes.func.isRequired,
-    }
+export default class UploadConfirmDialog extends React.Component<IProps> {
+    private objectUrl: string;
+    private mimeType: string;
 
     static defaultProps = {
         totalFiles: 1,
@@ -38,22 +41,28 @@ export default class UploadConfirmDialog extends React.Component {
     constructor(props) {
         super(props);
 
-        this._objectUrl = URL.createObjectURL(props.file);
+        // Create a fresh `Blob` for previewing (even though `File` already is
+        // one) so we can adjust the MIME type if needed.
+        this.mimeType = getBlobSafeMimeType(props.file.type);
+        const blob = new Blob([props.file], { type:
+            this.mimeType,
+        });
+        this.objectUrl = URL.createObjectURL(blob);
     }
 
     componentWillUnmount() {
-        if (this._objectUrl) URL.revokeObjectURL(this._objectUrl);
+        if (this.objectUrl) URL.revokeObjectURL(this.objectUrl);
     }
 
-    _onCancelClick = () => {
+    private onCancelClick = () => {
         this.props.onFinished(false);
     }
 
-    _onUploadClick = () => {
+    private onUploadClick = () => {
         this.props.onFinished(true);
     }
 
-    _onUploadAllClick = () => {
+    private onUploadAllClick = () => {
         this.props.onFinished(true, true);
     }
 
@@ -75,10 +84,10 @@ export default class UploadConfirmDialog extends React.Component {
         }
 
         let preview;
-        if (this.props.file.type.startsWith('image/')) {
+        if (this.mimeType.startsWith('image/')) {
             preview = <div className="mx_UploadConfirmDialog_previewOuter">
                 <div className="mx_UploadConfirmDialog_previewInner">
-                    <div><img className="mx_UploadConfirmDialog_imagePreview" src={this._objectUrl} /></div>
+                    <div><img className="mx_UploadConfirmDialog_imagePreview" src={this.objectUrl} /></div>
                     <div>{this.props.file.name} ({filesize(this.props.file.size)})</div>
                 </div>
             </div>;
@@ -95,7 +104,7 @@ export default class UploadConfirmDialog extends React.Component {
 
         let uploadAllButton;
         if (this.props.currentIndex + 1 < this.props.totalFiles) {
-            uploadAllButton = <button onClick={this._onUploadAllClick}>
+            uploadAllButton = <button onClick={this.onUploadAllClick}>
                 {_t("Upload all")}
             </button>;
         }
@@ -103,7 +112,7 @@ export default class UploadConfirmDialog extends React.Component {
         return (
             <BaseDialog className='mx_UploadConfirmDialog'
                 fixedWidth={false}
-                onFinished={this._onCancelClick}
+                onFinished={this.onCancelClick}
                 title={title}
                 contentId='mx_Dialog_content'
             >
@@ -113,7 +122,7 @@ export default class UploadConfirmDialog extends React.Component {
 
                 <DialogButtons primaryButton={_t('Upload')}
                     hasCancel={false}
-                    onPrimaryButtonClick={this._onUploadClick}
+                    onPrimaryButtonClick={this.onUploadClick}
                     focus={true}
                 >
                     {uploadAllButton}

src/components/views/dialogs/UserSettingsDialog.js

@@ -125,7 +125,10 @@ export default class UserSettingsDialog extends React.Component {
             "mx_UserSettingsDialog_securityIcon",
             <SecurityUserSettingsTab closeSettingsFn={this.props.onFinished} />,
         ));
-        if (SdkConfig.get()['showLabsSettings']) {
+        // Show the Labs tab if enabled or if there are any active betas
+        if (SdkConfig.get()['showLabsSettings']
+            || SettingsStore.getFeatureSettingNames().some(k => SettingsStore.getBetaInfo(k))
+        ) {
             tabs.push(new Tab(
                 USER_LABS_TAB,
                 _td("Labs"),
@@ -155,8 +158,12 @@ export default class UserSettingsDialog extends React.Component {
         const BaseDialog = sdk.getComponent('views.dialogs.BaseDialog');
 
         return (
-            <BaseDialog className='mx_UserSettingsDialog' hasCancel={true}
-                        onFinished={this.props.onFinished} title={_t("Settings")}>
+            <BaseDialog
+                className='mx_UserSettingsDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Settings")}
+            >
                 <div className='mx_SettingsDialog_content'>
                     <TabbedView tabs={this._getTabs()} initialTabId={this.props.initialTabId} />
                 </div>

src/components/views/dialogs/VerificationRequestDialog.js

@@ -52,11 +52,13 @@ export default class VerificationRequestDialog extends React.Component {
         const title = request && request.isSelfVerification ?
             _t("Verify other login") : _t("Verification Request");
 
-        return <BaseDialog className="mx_InfoDialog" onFinished={this.props.onFinished}
-                contentId="mx_Dialog_content"
-                title={title}
-                hasCancel={true}
-            >
+        return <BaseDialog
+            className="mx_InfoDialog"
+            onFinished={this.props.onFinished}
+            contentId="mx_Dialog_content"
+            title={title}
+            hasCancel={true}
+        >
             <EncryptionPanel
                 layout="dialog"
                 verificationRequest={this.props.verificationRequest}

src/components/views/dialogs/WidgetOpenIDPermissionsDialog.js

@@ -70,9 +70,12 @@ export default class WidgetOpenIDPermissionsDialog extends React.Component {
         const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
         return (
-            <BaseDialog className='mx_WidgetOpenIDPermissionsDialog' hasCancel={true}
-                        onFinished={this.props.onFinished}
-                        title={_t("Allow this widget to verify your identity")}>
+            <BaseDialog
+                className='mx_WidgetOpenIDPermissionsDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Allow this widget to verify your identity")}
+            >
                 <div className='mx_WidgetOpenIDPermissionsDialog_content'>
                     <p>
                         {_t("The widget will verify your user ID, but won't be able to perform actions for you:")}

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

@@ -345,6 +345,7 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
                 <form className="mx_AccessSecretStorageDialog_primaryContainer" onSubmit={this.onPassPhraseNext}>
                     <input
                         type="password"
+                        id="mx_passPhraseInput"
                         className="mx_AccessSecretStorageDialog_passPhraseInput"
                         onChange={this.onPassPhraseChange}
                         value={this.state.passPhrase}

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

@@ -40,10 +40,11 @@ export default class ConfirmDestroyCrossSigningDialog extends React.Component {
 
         return (
             <BaseDialog
-                    className='mx_ConfirmDestroyCrossSigningDialog'
-                    hasCancel={true}
-                    onFinished={this.props.onFinished}
-                    title={_t("Destroy cross-signing keys?")}>
+                className='mx_ConfirmDestroyCrossSigningDialog'
+                hasCancel={true}
+                onFinished={this.props.onFinished}
+                title={_t("Destroy cross-signing keys?")}
+            >
                 <div className='mx_ConfirmDestroyCrossSigningDialog_content'>
                     <p>
                         {_t(

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

@@ -373,21 +373,24 @@ export default class RestoreKeyBackupDialog extends React.PureComponent {
                 {_t(
                     "If you've forgotten your Security Phrase you can "+
                     "<button1>use your Security Key</button1> or " +
-                    "<button2>set up new recovery options</button2>"
-                , {}, {
-                    button1: s => <AccessibleButton className="mx_linkButton"
-                        element="span"
-                        onClick={this._onUseRecoveryKeyClick}
-                    >
-                        {s}
-                    </AccessibleButton>,
-                    button2: s => <AccessibleButton className="mx_linkButton"
-                        element="span"
-                        onClick={this._onResetRecoveryClick}
-                    >
-                        {s}
-                    </AccessibleButton>,
-                })}
+                    "<button2>set up new recovery options</button2>",
+                    {},
+                    {
+                        button1: s => <AccessibleButton
+                            className="mx_linkButton"
+                            element="span"
+                            onClick={this._onUseRecoveryKeyClick}
+                        >
+                            {s}
+                        </AccessibleButton>,
+                        button2: s => <AccessibleButton
+                            className="mx_linkButton"
+                            element="span"
+                            onClick={this._onResetRecoveryClick}
+                        >
+                            {s}
+                        </AccessibleButton>,
+                    })}
             </div>;
         } else {
             title = _t("Enter Security Key");
@@ -435,15 +438,17 @@ export default class RestoreKeyBackupDialog extends React.PureComponent {
                 </div>
                 {_t(
                     "If you've forgotten your Security Key you can "+
-                    "<button>set up new recovery options</button>"
-                , {}, {
-                    button: s => <AccessibleButton className="mx_linkButton"
-                        element="span"
-                        onClick={this._onResetRecoveryClick}
-                    >
-                        {s}
-                    </AccessibleButton>,
-                })}
+                    "<button>set up new recovery options</button>",
+                    {},
+                    {
+                        button: s => <AccessibleButton className="mx_linkButton"
+                            element="span"
+                            onClick={this._onResetRecoveryClick}
+                        >
+                            {s}
+                        </AccessibleButton>,
+                    },
+                )}
             </div>;
         }
 
@@ -452,9 +457,9 @@ export default class RestoreKeyBackupDialog extends React.PureComponent {
                 onFinished={this.props.onFinished}
                 title={title}
             >
-            <div className='mx_RestoreKeyBackupDialog_content'>
-                {content}
-            </div>
+                <div className='mx_RestoreKeyBackupDialog_content'>
+                    {content}
+                </div>
             </BaseDialog>
         );
     }

src/components/views/directory/NetworkDropdown.js

@@ -49,6 +49,18 @@ const inPlaceOf = (elementRect) => ({
 });
 
 const validServer = withValidation({
+    deriveData: async ({ value }) => {
+        try {
+            // check if we can successfully load this server's room directory
+            await MatrixClientPeg.get().publicRooms({
+                limit: 1,
+                server: value,
+            });
+            return {};
+        } catch (error) {
+            return { error };
+        }
+    },
     rules: [
         {
             key: "required",
@@ -57,21 +69,11 @@ const validServer = withValidation({
         }, {
             key: "available",
             final: true,
-            test: async ({ value }) => {
-                try {
-                    const opts = {
-                        limit: 1,
-                        server: value,
-                    };
-                    // check if we can successfully load this server's room directory
-                    await MatrixClientPeg.get().publicRooms(opts);
-                    return true;
-                } catch (e) {
-                    return false;
-                }
-            },
+            test: async (_, { error }) => !error,
             valid: () => _t("Looks good"),
-            invalid: () => _t("Can't find this server or its room list"),
+            invalid: ({ error }) => error.errcode === "M_FORBIDDEN"
+                ? _t("You are not allowed to view this server's rooms list")
+                : _t("Can't find this server or its room list"),
         },
     ],
 });

src/components/views/elements/ActionButton.js

@@ -32,6 +32,7 @@ export default class ActionButton extends React.Component {
         label: PropTypes.string.isRequired,
         iconPath: PropTypes.string,
         className: PropTypes.string,
+        children: PropTypes.node,
     };
 
     static defaultProps = {
@@ -70,8 +71,8 @@ export default class ActionButton extends React.Component {
         }
 
         const icon = this.props.iconPath ?
-                (<TintableSvg src={this.props.iconPath} width={this.props.size} height={this.props.size} />) :
-                undefined;
+            (<TintableSvg src={this.props.iconPath} width={this.props.size} height={this.props.size} />) :
+            undefined;
 
         const classNames = ["mx_RoleButton"];
         if (this.props.className) {
@@ -79,7 +80,8 @@ export default class ActionButton extends React.Component {
         }
 
         return (
-            <AccessibleButton className={classNames.join(" ")}
+            <AccessibleButton
+                className={classNames.join(" ")}
                 onClick={this._onClick}
                 onMouseEnter={this._onMouseEnter}
                 onMouseLeave={this._onMouseLeave}
@@ -87,6 +89,7 @@ export default class ActionButton extends React.Component {
             >
                 { icon }
                 { tooltip }
+                { this.props.children }
             </AccessibleButton>
         );
     }

src/components/views/elements/AppTile.js

@@ -109,7 +109,7 @@ export default class AppTile extends React.Component {
         const childContentProtocol = u.protocol;
         if (parentContentProtocol === 'https:' && childContentProtocol !== 'https:') {
             console.warn("Refusing to load mixed-content app:",
-            parentContentProtocol, childContentProtocol, window.location, this.props.app.url);
+                parentContentProtocol, childContentProtocol, window.location, this.props.app.url);
             return true;
         }
         return false;

src/components/views/elements/EditableItemList.js

@@ -65,12 +65,18 @@ export class EditableItem extends React.Component {
                     <span className="mx_EditableItem_promptText">
                         {_t("Are you sure?")}
                     </span>
-                    <AccessibleButton onClick={this._onActuallyRemove} kind="primary_sm"
-                                      className="mx_EditableItem_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onActuallyRemove}
+                        kind="primary_sm"
+                        className="mx_EditableItem_confirmBtn"
+                    >
                         {_t("Yes")}
                     </AccessibleButton>
-                    <AccessibleButton onClick={this._onDontRemove} kind="danger_sm"
-                                      className="mx_EditableItem_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onDontRemove}
+                        kind="danger_sm"
+                        className="mx_EditableItem_confirmBtn"
+                    >
                         {_t("No")}
                     </AccessibleButton>
                 </div>
@@ -121,11 +127,15 @@ export default class EditableItemList extends React.Component {
 
     _renderNewItemField() {
         return (
-            <form onSubmit={this._onItemAdded} autoComplete="off"
-                  noValidate={true} className="mx_EditableItemList_newItem">
+            <form
+                onSubmit={this._onItemAdded}
+                autoComplete="off"
+                noValidate={true}
+                className="mx_EditableItemList_newItem"
+            >
                 <Field label={this.props.placeholder} type="text"
-                       autoComplete="off" value={this.props.newItem || ""} onChange={this._onNewItemChanged}
-                       list={this.props.suggestionsListId} />
+                    autoComplete="off" value={this.props.newItem || ""} onChange={this._onNewItemChanged}
+                    list={this.props.suggestionsListId} />
                 <AccessibleButton onClick={this._onItemAdded} kind="primary" type="submit" disabled={!this.props.newItem}>
                     {_t("Add")}
                 </AccessibleButton>

src/components/views/elements/EditableText.js

@@ -221,13 +221,15 @@ export default class EditableText extends React.Component {
             </div>;
         } else {
             // show the content editable div, but manually manage its contents as react and contentEditable don't play nice together
-            editableEl = <div ref={this._editable_div}
-                              contentEditable={true}
-                              className={className}
-                              onKeyDown={this.onKeyDown}
-                              onKeyUp={this.onKeyUp}
-                              onFocus={this.onFocus}
-                              onBlur={this.onBlur} />;
+            editableEl = <div
+                ref={this._editable_div}
+                contentEditable={true}
+                className={className}
+                onKeyDown={this.onKeyDown}
+                onKeyUp={this.onKeyUp}
+                onFocus={this.onFocus}
+                onBlur={this.onBlur}
+            />;
         }
 
         return editableEl;

src/components/views/elements/ImageView.tsx

@@ -108,23 +108,20 @@ export default class ImageView extends React.Component<IProps, IState> {
         window.addEventListener("resize", this.calculateZoom);
         // After the image loads for the first time we want to calculate the zoom
         this.image.current.addEventListener("load", this.calculateZoom);
-        // Try to precalculate the zoom from width and height props
-        this.calculateZoom();
     }
 
     componentWillUnmount() {
         this.focusLock.current.removeEventListener('wheel', this.onWheel);
+        window.removeEventListener("resize", this.calculateZoom);
+        this.image.current.removeEventListener("load", this.calculateZoom);
     }
 
     private calculateZoom = () => {
         const image = this.image.current;
         const imageWrapper = this.imageWrapper.current;
 
-        const width = this.props.width || image.naturalWidth;
-        const height = this.props.height || image.naturalHeight;
-
-        const zoomX = imageWrapper.clientWidth / width;
-        const zoomY = imageWrapper.clientHeight / height;
+        const zoomX = imageWrapper.clientWidth / image.naturalWidth;
+        const zoomY = imageWrapper.clientHeight / image.naturalHeight;
 
         // If the image is smaller in both dimensions set its the zoom to 1 to
         // display it in its original size
@@ -210,6 +207,7 @@ export default class ImageView extends React.Component<IProps, IState> {
         a.href = this.props.src;
         a.download = this.props.name;
         a.target = "_blank";
+        a.rel = "noreferrer noopener";
         a.click();
     };
 
@@ -445,16 +443,16 @@ export default class ImageView extends React.Component<IProps, IState> {
                 <div className="mx_ImageView_panel">
                     {info}
                     <div className="mx_ImageView_toolbar">
-                        <AccessibleTooltipButton
-                            className="mx_ImageView_button mx_ImageView_button_rotateCW"
-                            title={_t("Rotate Right")}
-                            onClick={this.onRotateClockwiseClick}>
-                        </AccessibleTooltipButton>
                         <AccessibleTooltipButton
                             className="mx_ImageView_button mx_ImageView_button_rotateCCW"
                             title={_t("Rotate Left")}
                             onClick={ this.onRotateCounterClockwiseClick }>
                         </AccessibleTooltipButton>
+                        <AccessibleTooltipButton
+                            className="mx_ImageView_button mx_ImageView_button_rotateCW"
+                            title={_t("Rotate Right")}
+                            onClick={this.onRotateClockwiseClick}>
+                        </AccessibleTooltipButton>
                         {zoomOutButton}
                         {zoomInButton}
                         <AccessibleTooltipButton

src/components/views/elements/LabelledToggleSwitch.js

@@ -46,8 +46,12 @@ export default class LabelledToggleSwitch extends React.Component {
         // This is a minimal version of a SettingsFlag
 
         let firstPart = <span className="mx_SettingsFlag_label">{this.props.label}</span>;
-        let secondPart = <ToggleSwitch checked={this.props.value} disabled={this.props.disabled}
-                                         onChange={this.props.onChange} aria-label={this.props.label} />;
+        let secondPart = <ToggleSwitch
+            checked={this.props.value}
+            disabled={this.props.disabled}
+            onChange={this.props.onChange}
+            aria-label={this.props.label}
+        />;
 
         if (this.props.toggleInFront) {
             const temp = firstPart;

src/components/views/elements/LanguageDropdown.js

@@ -60,10 +60,10 @@ export default class LanguageDropdown extends React.Component {
             // doesn't know this, therefore we do this.
             const language = SettingsStore.getValue("language", null, /*excludeDefault:*/true);
             if (language) {
-              this.props.onOptionChange(language);
+                this.props.onOptionChange(language);
             } else {
-              const language = languageHandler.normalizeLanguageKey(languageHandler.getLanguageFromBrowser());
-              this.props.onOptionChange(language);
+                const language = languageHandler.normalizeLanguageKey(languageHandler.getLanguageFromBrowser());
+                this.props.onOptionChange(language);
             }
         }
     }

src/components/views/elements/Pill.js

@@ -225,19 +225,19 @@ class Pill extends React.Component {
             }
                 break;
             case Pill.TYPE_USER_MENTION: {
-                    // If this user is not a member of this room, default to the empty member
-                    const member = this.state.member;
-                    if (member) {
-                        userId = member.userId;
-                        member.rawDisplayName = member.rawDisplayName || '';
-                        linkText = member.rawDisplayName;
-                        if (this.props.shouldShowPillAvatar) {
-                            avatar = <MemberAvatar member={member} width={16} height={16} aria-hidden="true" />;
-                        }
-                        pillClass = 'mx_UserPill';
-                        href = null;
-                        onClick = this.onUserPillClicked;
+                // If this user is not a member of this room, default to the empty member
+                const member = this.state.member;
+                if (member) {
+                    userId = member.userId;
+                    member.rawDisplayName = member.rawDisplayName || '';
+                    linkText = member.rawDisplayName;
+                    if (this.props.shouldShowPillAvatar) {
+                        avatar = <MemberAvatar member={member} width={16} height={16} aria-hidden="true" />;
                     }
+                    pillClass = 'mx_UserPill';
+                    href = null;
+                    onClick = this.onUserPillClicked;
+                }
             }
                 break;
             case Pill.TYPE_ROOM_MENTION: {

src/components/views/elements/PowerSelector.js

@@ -135,9 +135,13 @@ export default class PowerSelector extends React.Component {
         if (this.state.custom) {
             picker = (
                 <Field type="number"
-                       label={label} max={this.props.maxValue}
-                       onBlur={this.onCustomBlur} onKeyDown={this.onCustomKeyDown} onChange={this.onCustomChange}
-                       value={String(this.state.customValue)} disabled={this.props.disabled} />
+                    label={label} max={this.props.maxValue}
+                    onBlur={this.onCustomBlur}
+                    onKeyDown={this.onCustomKeyDown}
+                    onChange={this.onCustomChange}
+                    value={String(this.state.customValue)}
+                    disabled={this.props.disabled}
+                />
             );
         } else {
             // Each level must have a definition in this.state.levelRoleMap
@@ -154,8 +158,9 @@ export default class PowerSelector extends React.Component {
 
             picker = (
                 <Field element="select"
-                       label={label} onChange={this.onSelectChange}
-                       value={String(this.state.selectValue)} disabled={this.props.disabled}>
+                    label={label} onChange={this.onSelectChange}
+                    value={String(this.state.selectValue)} disabled={this.props.disabled}
+                >
                     {options}
                 </Field>
             );

src/components/views/elements/RoomAliasField.js

@@ -46,17 +46,18 @@ export default class RoomAliasField extends React.PureComponent {
         const domain = (<span title={aliasPostfix}>{aliasPostfix}</span>);
         const maxlength = 255 - this.props.domain.length - 2;   // 2 for # and :
         return (
-                <Field
-                    label={_t("Room address")}
-                    className="mx_RoomAliasField"
-                    prefixComponent={poundSign}
-                    postfixComponent={domain}
-                    ref={ref => this._fieldRef = ref}
-                    onValidate={this._onValidate}
-                    placeholder={_t("e.g. my-room")}
-                    onChange={this._onChange}
-                    value={this.props.value.substring(1, this.props.value.length - this.props.domain.length - 1)}
-                    maxLength={maxlength} />
+            <Field
+                label={_t("Room address")}
+                className="mx_RoomAliasField"
+                prefixComponent={poundSign}
+                postfixComponent={domain}
+                ref={ref => this._fieldRef = ref}
+                onValidate={this._onValidate}
+                placeholder={_t("e.g. my-room")}
+                onChange={this._onChange}
+                value={this.props.value.substring(1, this.props.value.length - this.props.domain.length - 1)}
+                maxLength={maxlength}
+            />
         );
     }
 

src/components/views/elements/ServerPicker.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.
@@ -67,7 +67,7 @@ const ServerPicker = ({ title, dialogTitle, serverConfig, onServerConfigChange }
         </AccessibleButton>;
     }
 
-    let serverName = serverConfig.isNameResolvable ? serverConfig.hsName : serverConfig.hsUrl;
+    let serverName: React.ReactNode = serverConfig.isNameResolvable ? serverConfig.hsName : serverConfig.hsUrl;
     if (serverConfig.hsNameIsDifferent) {
         serverName = <TextWithTooltip class="mx_Login_underlinedServerName" tooltip={serverConfig.hsUrl}>
             {serverConfig.hsName}

src/components/views/elements/TintableSvg.js

@@ -59,13 +59,13 @@ class TintableSvg extends React.Component {
     render() {
         return (
             <object className={"mx_TintableSvg " + (this.props.className ? this.props.className : "")}
-                    type="image/svg+xml"
-                    data={this.props.src}
-                    width={this.props.width}
-                    height={this.props.height}
-                    onLoad={this.onLoad}
-                    tabIndex="-1"
-                />
+                type="image/svg+xml"
+                data={this.props.src}
+                width={this.props.width}
+                height={this.props.height}
+                onLoad={this.onLoad}
+                tabIndex="-1"
+            />
         );
     }
 }

src/components/views/groups/GroupMemberList.js

@@ -178,9 +178,15 @@ export default class GroupMemberList extends React.Component {
         }
 
         const inputBox = (
-            <input className="mx_GroupMemberList_query mx_textinput" id="mx_GroupMemberList_query" type="text"
-                    onChange={this.onSearchQueryChanged} value={this.state.searchQuery}
-                    placeholder={_t('Filter community members')} autoComplete="off" />
+            <input
+                className="mx_GroupMemberList_query mx_textinput"
+                id="mx_GroupMemberList_query"
+                type="text"
+                onChange={this.onSearchQueryChanged}
+                value={this.state.searchQuery}
+                placeholder={_t('Filter community members')}
+                autoComplete="off"
+            />
         );
 
         const joined = this.state.members ? <div className="mx_MemberList_joined">

src/components/views/groups/GroupPublicityToggle.js

@@ -67,11 +67,11 @@ export default class GroupPublicityToggle extends React.Component {
         const GroupTile = sdk.getComponent('groups.GroupTile');
         return <div className="mx_GroupPublicity_toggle">
             <GroupTile groupId={this.props.groupId} showDescription={false}
-                       avatarHeight={40} draggable={false}
+                avatarHeight={40} draggable={false}
             />
             <ToggleSwitch checked={this.state.isGroupPublicised}
-                          disabled={!this.state.ready || this.state.busy}
-                          onChange={this._onPublicityToggle} />
+                disabled={!this.state.ready || this.state.busy}
+                onChange={this._onPublicityToggle} />
         </div>;
     }
 }

src/components/views/groups/GroupRoomList.js

@@ -141,9 +141,14 @@ export default class GroupRoomList extends React.Component {
             );
         }
         const inputBox = (
-            <input className="mx_GroupRoomList_query mx_textinput" id="mx_GroupRoomList_query" type="text"
-                    onChange={this.onSearchQueryChanged} value={this.state.searchQuery}
-                    placeholder={_t('Filter community rooms')} autoComplete="off" />
+            <input
+                className="mx_GroupRoomList_query mx_textinput" id="mx_GroupRoomList_query"
+                type="text"
+                onChange={this.onSearchQueryChanged}
+                value={this.state.searchQuery}
+                placeholder={_t('Filter community rooms')}
+                autoComplete="off"
+            />
         );
 
         const TruncatedList = sdk.getComponent("elements.TruncatedList");
@@ -152,7 +157,7 @@ export default class GroupRoomList extends React.Component {
                 { inviteButton }
                 <AutoHideScrollbar className="mx_GroupRoomList_joined mx_GroupRoomList_outerWrapper">
                     <TruncatedList className="mx_GroupRoomList_wrapper" truncateAt={this.state.truncateAt}
-                            createOverflowElement={this._createOverflowTile}>
+                        createOverflowElement={this._createOverflowTile}>
                         { this.makeGroupRoomTiles(this.state.searchQuery) }
                     </TruncatedList>
                 </AutoHideScrollbar>

src/components/views/messages/MImageBody.js

@@ -125,9 +125,9 @@ export default class MImageBody extends React.Component {
     _isGif() {
         const content = this.props.mxEvent.getContent();
         return (
-          content &&
-          content.info &&
-          content.info.mimetype === "image/gif"
+            content &&
+            content.info &&
+            content.info.mimetype === "image/gif"
         );
     }
 
@@ -185,9 +185,8 @@ export default class MImageBody extends React.Component {
         // So either we need to support custom timeline widths here, or reimpose the cap, otherwise the
         // thumbnail resolution will be unnecessarily reduced.
         // custom timeline widths seems preferable.
-        const pixelRatio = window.devicePixelRatio;
-        const thumbWidth = Math.round(800 * pixelRatio);
-        const thumbHeight = Math.round(600 * pixelRatio);
+        const thumbWidth = 800;
+        const thumbHeight = 600;
 
         const content = this.props.mxEvent.getContent();
         const media = mediaFromContent(content);
@@ -218,7 +217,7 @@ export default class MImageBody extends React.Component {
             const info = content.info;
             if (
                 this._isGif() ||
-                pixelRatio === 1.0 ||
+                window.devicePixelRatio === 1.0 ||
                 (!info || !info.w || !info.h || !info.size)
             ) {
                 return media.getThumbnailOfSourceHttp(thumbWidth, thumbHeight);
@@ -347,9 +346,9 @@ export default class MImageBody extends React.Component {
                 } else {
                     imageElement = (
                         <img style={{display: 'none'}} src={thumbUrl} ref={this._image}
-                             alt={content.body}
-                             onError={this.onImageError}
-                             onLoad={this.onImageLoad}
+                            alt={content.body}
+                            onError={this.onImageError}
+                            onLoad={this.onImageLoad}
                         />
                     );
                 }
@@ -385,12 +384,12 @@ export default class MImageBody extends React.Component {
             // mx_MImageBody_thumbnail resizes img to exactly container size
             img = (
                 <img className="mx_MImageBody_thumbnail" src={thumbUrl} ref={this._image}
-                     style={{ maxWidth: maxWidth + "px" }}
-                     alt={content.body}
-                     onError={this.onImageError}
-                     onLoad={this.onImageLoad}
-                     onMouseEnter={this.onImageEnter}
-                     onMouseLeave={this.onImageLeave} />
+                    style={{ maxWidth: maxWidth + "px" }}
+                    alt={content.body}
+                    onError={this.onImageError}
+                    onLoad={this.onImageLoad}
+                    onMouseEnter={this.onImageEnter}
+                    onMouseLeave={this.onImageLeave} />
             );
         }
 
@@ -468,9 +467,9 @@ export default class MImageBody extends React.Component {
         const contentUrl = this._getContentUrl();
         let thumbUrl;
         if (this._isGif() && SettingsStore.getValue("autoplayGifsAndVideos")) {
-          thumbUrl = contentUrl;
+            thumbUrl = contentUrl;
         } else {
-          thumbUrl = this._getThumbUrl();
+            thumbUrl = this._getThumbUrl();
         }
 
         const thumbnail = this._messageContent(contentUrl, thumbUrl, content);

src/components/views/messages/MKeyVerificationConclusion.js

@@ -82,9 +82,7 @@ export default class MKeyVerificationConclusion extends React.Component {
         }
 
         // User isn't actually verified
-        if (!MatrixClientPeg.get()
-                            .checkUserTrust(request.otherUserId)
-                            .isCrossSigningVerified()) {
+        if (!MatrixClientPeg.get().checkUserTrust(request.otherUserId).isCrossSigningVerified()) {
             return false;
         }
 

src/components/views/messages/MVoiceMessageBody.tsx

@@ -0,0 +1,106 @@
+/*
+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} from "matrix-js-sdk/src/models/event";
+import {replaceableComponent} from "../../../utils/replaceableComponent";
+import {Playback} from "../../../voice/Playback";
+import MFileBody from "./MFileBody";
+import InlineSpinner from '../elements/InlineSpinner';
+import {_t} from "../../../languageHandler";
+import {mediaFromContent} from "../../../customisations/Media";
+import {decryptFile} from "../../../utils/DecryptFile";
+import RecordingPlayback from "../voice_messages/RecordingPlayback";
+
+interface IProps {
+    mxEvent: MatrixEvent;
+}
+
+interface IState {
+    error?: Error;
+    playback?: Playback;
+    decryptedBlob?: Blob;
+}
+
+@replaceableComponent("views.messages.MVoiceMessageBody")
+export default class MVoiceMessageBody extends React.PureComponent<IProps, IState> {
+    constructor(props: IProps) {
+        super(props);
+
+        this.state = {};
+    }
+
+    public async componentDidMount() {
+        let buffer: ArrayBuffer;
+        const content = this.props.mxEvent.getContent();
+        const media = mediaFromContent(content);
+        if (media.isEncrypted) {
+            try {
+                const blob = await decryptFile(content.file);
+                buffer = await blob.arrayBuffer();
+                this.setState({decryptedBlob: blob});
+            } catch (e) {
+                this.setState({error: e});
+                console.warn("Unable to decrypt voice message", e);
+                return; // stop processing the audio file
+            }
+        } else {
+            try {
+                buffer = await media.downloadSource().then(r => r.blob()).then(r => r.arrayBuffer());
+            } catch (e) {
+                this.setState({error: e});
+                console.warn("Unable to download voice message", e);
+                return; // stop processing the audio file
+            }
+        }
+
+        const waveform = content?.["org.matrix.msc1767.audio"]?.waveform?.map(p => p / 1024);
+
+        // We should have a buffer to work with now: let's set it up
+        const playback = new Playback(buffer, waveform);
+        this.setState({playback});
+        // Note: the RecordingPlayback component will handle preparing the Playback class for us.
+    }
+
+    public render() {
+        if (this.state.error) {
+            // TODO: @@TR: Verify error state
+            return (
+                <span className="mx_MVoiceMessageBody">
+                    <img src={require("../../../../res/img/warning.svg")} width="16" height="16" />
+                    { _t("Error processing voice message") }
+                </span>
+            );
+        }
+
+        if (!this.state.playback) {
+            // TODO: @@TR: Verify loading/decrypting state
+            return (
+                <span className="mx_MVoiceMessageBody">
+                    <InlineSpinner />
+                </span>
+            );
+        }
+
+        // At this point we should have a playable state
+        return (
+            <span className="mx_MVoiceMessageBody">
+                <RecordingPlayback playback={this.state.playback} />
+                <MFileBody {...this.props} decryptedBlob={this.state.decryptedBlob} showGenericPlaceholder={false} />
+            </span>
+        )
+    }
+}

src/components/views/messages/MVoiceOrAudioBody.tsx

@@ -0,0 +1,39 @@
+/*
+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} from "matrix-js-sdk/src/models/event";
+import MAudioBody from "./MAudioBody";
+import {replaceableComponent} from "../../../utils/replaceableComponent";
+import SettingsStore from "../../../settings/SettingsStore";
+import MVoiceMessageBody from "./MVoiceMessageBody";
+
+interface IProps {
+    mxEvent: MatrixEvent;
+}
+
+@replaceableComponent("views.messages.MVoiceOrAudioBody")
+export default class MVoiceOrAudioBody extends React.PureComponent<IProps> {
+    public render() {
+        const isVoiceMessage = !!this.props.mxEvent.getContent()['org.matrix.msc2516.voice'];
+        const voiceMessagesEnabled = SettingsStore.getValue("feature_voice_messages");
+        if (isVoiceMessage && voiceMessagesEnabled) {
+            return <MVoiceMessageBody {...this.props} />;
+        } else {
+            return <MAudioBody {...this.props} />;
+        }
+    }
+}

src/components/views/messages/MessageEvent.js

@@ -72,12 +72,8 @@ export default class MessageEvent extends React.Component {
             'm.emote': sdk.getComponent('messages.TextualBody'),
             'm.image': sdk.getComponent('messages.MImageBody'),
             'm.file': sdk.getComponent('messages.MFileBody'),
-            'm.audio': sdk.getComponent('messages.MAudioBody'),
+            'm.audio': sdk.getComponent('messages.MVoiceOrAudioBody'),
             'm.video': sdk.getComponent('messages.MVideoBody'),
-
-            // TODO: @@ TravisR: Use labs flag determination.
-            // MSC: https://github.com/matrix-org/matrix-doc/pull/2516
-            'org.matrix.msc2516.voice': sdk.getComponent('messages.MAudioBody'),
         };
         const evTypes = {
             'm.sticker': sdk.getComponent('messages.MStickerBody'),

src/components/views/messages/ReactionsRow.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd
+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.
@@ -14,29 +14,68 @@ 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 from "react";
+import classNames from "classnames";
+import { EventType } from "matrix-js-sdk/src/@types/event";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { Relations } from "matrix-js-sdk/src/models/relations";
 
-import * as sdk from '../../../index';
 import { _t } from '../../../languageHandler';
 import { isContentActionable } from '../../../utils/EventUtils';
-import {MatrixClientPeg} from '../../../MatrixClientPeg';
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import { ContextMenuTooltipButton } from "../../../accessibility/context_menu/ContextMenuTooltipButton";
+import { aboveLeftOf, ContextMenu, useContextMenu } from "../../structures/ContextMenu";
+import ReactionPicker from "../emojipicker/ReactionPicker";
+import ReactionsRowButton from "./ReactionsRowButton";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
 
 // The maximum number of reactions to initially show on a message.
 const MAX_ITEMS_WHEN_LIMITED = 8;
 
-@replaceableComponent("views.messages.ReactionsRow")
-export default class ReactionsRow extends React.PureComponent {
-    static propTypes = {
-        // The event we're displaying reactions for
-        mxEvent: PropTypes.object.isRequired,
-        // The Relations model from the JS SDK for reactions to `mxEvent`
-        reactions: PropTypes.object,
+const ReactButton = ({ mxEvent, reactions }: IProps) => {
+    const [menuDisplayed, button, openMenu, closeMenu] = useContextMenu();
+
+    let contextMenu;
+    if (menuDisplayed) {
+        const buttonRect = button.current.getBoundingClientRect();
+        contextMenu = <ContextMenu {...aboveLeftOf(buttonRect)} onFinished={closeMenu} managed={false}>
+            <ReactionPicker mxEvent={mxEvent} reactions={reactions} onFinished={closeMenu} />
+        </ContextMenu>;
     }
 
-    constructor(props) {
-        super(props);
+    return <React.Fragment>
+        <ContextMenuTooltipButton
+            className={classNames("mx_ReactionsRow_addReactionButton", {
+                mx_ReactionsRow_addReactionButton_active: menuDisplayed,
+            })}
+            title={_t("Add reaction")}
+            onClick={openMenu}
+            isExpanded={menuDisplayed}
+            inputRef={button}
+        />
+
+        { contextMenu }
+    </React.Fragment>;
+};
+
+interface IProps {
+    // The event we're displaying reactions for
+    mxEvent: MatrixEvent;
+    // The Relations model from the JS SDK for reactions to `mxEvent`
+    reactions?: Relations;
+}
+
+interface IState {
+    myReactions: MatrixEvent[];
+    showAll: boolean;
+}
+
+@replaceableComponent("views.messages.ReactionsRow")
+export default class ReactionsRow extends React.PureComponent<IProps, IState> {
+    static contextType = MatrixClientContext;
+
+    constructor(props, context) {
+        super(props, context);
 
         if (props.reactions) {
             props.reactions.on("Relations.add", this.onReactionsChange);
@@ -92,7 +131,7 @@ export default class ReactionsRow extends React.PureComponent {
         if (!reactions) {
             return null;
         }
-        const userId = MatrixClientPeg.get().getUserId();
+        const userId = this.context.getUserId();
         const myReactions = reactions.getAnnotationsBySender()[userId];
         if (!myReactions) {
             return null;
@@ -114,7 +153,6 @@ export default class ReactionsRow extends React.PureComponent {
             return null;
         }
 
-        const ReactionsRowButton = sdk.getComponent('messages.ReactionsRowButton');
         let items = reactions.getSortedAnnotationsByKey().map(([content, events]) => {
             const count = events.size;
             if (!count) {
@@ -151,13 +189,21 @@ export default class ReactionsRow extends React.PureComponent {
             </a>;
         }
 
+        const cli = this.context;
+
+        let addReactionButton;
+        if (cli.getRoom(mxEvent.getRoomId()).currentState.maySendEvent(EventType.Reaction, cli.getUserId())) {
+            addReactionButton = <ReactButton mxEvent={mxEvent} reactions={reactions} />;
+        }
+
         return <div
             className="mx_ReactionsRow"
             role="toolbar"
             aria-label={_t("Reactions")}
         >
-            {items}
-            {showAllButton}
+            { items }
+            { showAllButton }
+            { addReactionButton }
         </div>;
     }
 }

src/components/views/messages/ReactionsRowButton.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd
+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.
@@ -14,49 +14,54 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React from 'react';
-import PropTypes from 'prop-types';
-import classNames from 'classnames';
+import React from "react";
+import classNames from "classnames";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 
-import {MatrixClientPeg} from '../../../MatrixClientPeg';
-import * as sdk from '../../../index';
 import { _t } from '../../../languageHandler';
 import { formatCommaSeparatedList } from '../../../utils/FormattingUtils';
 import dis from "../../../dispatcher/dispatcher";
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import ReactionsRowButtonTooltip from "./ReactionsRowButtonTooltip";
+import AccessibleButton from "../elements/AccessibleButton";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+
+interface IProps {
+    // The event we're displaying reactions for
+    mxEvent: MatrixEvent;
+    // The reaction content / key / emoji
+    content: string;
+    // The count of votes for this key
+    count: number;
+    // A Set of Matrix reaction events for this key
+    reactionEvents: Set<MatrixEvent>;
+    // A possible Matrix event if the current user has voted for this type
+    myReactionEvent?: MatrixEvent;
+}
+
+interface IState {
+    tooltipRendered: boolean;
+    tooltipVisible: boolean;
+}
 
 @replaceableComponent("views.messages.ReactionsRowButton")
-export default class ReactionsRowButton extends React.PureComponent {
-    static propTypes = {
-        // The event we're displaying reactions for
-        mxEvent: PropTypes.object.isRequired,
-        // The reaction content / key / emoji
-        content: PropTypes.string.isRequired,
-        // The count of votes for this key
-        count: PropTypes.number.isRequired,
-        // A Set of Martix reaction events for this key
-        reactionEvents: PropTypes.object.isRequired,
-        // A possible Matrix event if the current user has voted for this type
-        myReactionEvent: PropTypes.object,
-    }
+export default class ReactionsRowButton extends React.PureComponent<IProps, IState> {
+    static contextType = MatrixClientContext;
 
-    constructor(props) {
-        super(props);
+    state = {
+        tooltipRendered: false,
+        tooltipVisible: false,
+    };
 
-        this.state = {
-            tooltipVisible: false,
-        };
-    }
-
-    onClick = (ev) => {
+    onClick = () => {
         const { mxEvent, myReactionEvent, content } = this.props;
         if (myReactionEvent) {
-            MatrixClientPeg.get().redactEvent(
+            this.context.redactEvent(
                 mxEvent.getRoomId(),
                 myReactionEvent.getId(),
             );
         } else {
-            MatrixClientPeg.get().sendEvent(mxEvent.getRoomId(), "m.reaction", {
+            this.context.sendEvent(mxEvent.getRoomId(), "m.reaction", {
                 "m.relates_to": {
                     "rel_type": "m.annotation",
                     "event_id": mxEvent.getId(),
@@ -83,8 +88,6 @@ export default class ReactionsRowButton extends React.PureComponent {
     }
 
     render() {
-        const ReactionsRowButtonTooltip =
-            sdk.getComponent('messages.ReactionsRowButtonTooltip');
         const { mxEvent, content, count, reactionEvents, myReactionEvent } = this.props;
 
         const classes = classNames({
@@ -102,7 +105,7 @@ export default class ReactionsRowButton extends React.PureComponent {
             />;
         }
 
-        const room = MatrixClientPeg.get().getRoom(mxEvent.getRoomId());
+        const room = this.context.getRoom(mxEvent.getRoomId());
         let label;
         if (room) {
             const senders = [];
@@ -129,12 +132,12 @@ export default class ReactionsRowButton extends React.PureComponent {
                 },
             );
         }
-
-        const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
+        const isPeeking = room.getMyMembership() !== "join";
         return <AccessibleButton
             className={classes}
             aria-label={label}
             onClick={this.onClick}
+            disabled={isPeeking}
             onMouseOver={this.onMouseOver}
             onMouseLeave={this.onMouseLeave}
         >

src/components/views/messages/ReactionsRowButtonTooltip.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 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.
@@ -14,33 +14,34 @@ 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 from "react";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 
-import {MatrixClientPeg} from '../../../MatrixClientPeg';
-import * as sdk from '../../../index';
 import { unicodeToShortcode } from '../../../HtmlUtils';
 import { _t } from '../../../languageHandler';
 import { formatCommaSeparatedList } from '../../../utils/FormattingUtils';
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import Tooltip from "../elements/Tooltip";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+
+interface IProps {
+    // The event we're displaying reactions for
+    mxEvent: MatrixEvent;
+    // The reaction content / key / emoji
+    content: string;
+    // A Set of Matrix reaction events for this key
+    reactionEvents: Set<MatrixEvent>;
+    visible: boolean;
+}
 
 @replaceableComponent("views.messages.ReactionsRowButtonTooltip")
-export default class ReactionsRowButtonTooltip extends React.PureComponent {
-    static propTypes = {
-        // The event we're displaying reactions for
-        mxEvent: PropTypes.object.isRequired,
-        // The reaction content / key / emoji
-        content: PropTypes.string.isRequired,
-        // A Set of Martix reaction events for this key
-        reactionEvents: PropTypes.object.isRequired,
-        visible: PropTypes.bool.isRequired,
-    }
+export default class ReactionsRowButtonTooltip extends React.PureComponent<IProps> {
+    static contextType = MatrixClientContext;
 
     render() {
-        const Tooltip = sdk.getComponent('elements.Tooltip');
         const { content, reactionEvents, mxEvent, visible } = this.props;
 
-        const room = MatrixClientPeg.get().getRoom(mxEvent.getRoomId());
+        const room = this.context.getRoom(mxEvent.getRoomId());
         let tooltipLabel;
         if (room) {
             const senders = [];

src/components/views/messages/TextualBody.js

@@ -521,11 +521,12 @@ export default class TextualBody extends React.Component {
             const LinkPreviewWidget = sdk.getComponent('rooms.LinkPreviewWidget');
             widgets = this.state.links.map((link)=>{
                 return <LinkPreviewWidget
-                            key={link}
-                            link={link}
-                            mxEvent={this.props.mxEvent}
-                            onCancelClick={this.onCancelClick}
-                            onHeightChanged={this.props.onHeightChanged} />;
+                    key={link}
+                    link={link}
+                    mxEvent={this.props.mxEvent}
+                    onCancelClick={this.onCancelClick}
+                    onHeightChanged={this.props.onHeightChanged}
+                />;
             });
         }
 

src/components/views/right_panel/UserInfo.tsx

@@ -67,7 +67,7 @@ import RoomAvatar from "../avatars/RoomAvatar";
 import RoomName from "../elements/RoomName";
 import {mediaFromMxc} from "../../../customisations/Media";
 
-interface IDevice {
+export interface IDevice {
     deviceId: string;
     ambiguous?: boolean;
     getDisplayName(): string;
@@ -187,9 +187,15 @@ function DeviceItem({userId, device}: {userId: string, device: IDevice}) {
         verifyDevice(cli.getUser(userId), device);
     };
 
-    const deviceName = device.ambiguous ?
-        (device.getDisplayName() ? device.getDisplayName() : "") + " (" + device.deviceId + ")" :
-        device.getDisplayName();
+    let deviceName;
+    if (!device.getDisplayName()?.trim()) {
+        deviceName = device.deviceId;
+    } else {
+        deviceName = device.ambiguous ?
+            device.getDisplayName() + " (" + device.deviceId + ")" :
+            device.getDisplayName();
+    }
+
     let trustedLabel = null;
     if (userTrust.isVerified()) trustedLabel = isVerified ? _t("Trusted") : _t("Not trusted");
 
@@ -440,7 +446,7 @@ const UserOptionsSection: React.FC<{
     );
 };
 
-const warnSelfDemote = async (isSpace) => {
+const warnSelfDemote = async (isSpace: boolean) => {
     const {finished} = Modal.createTrackedDialog('Demoting Self', '', QuestionDialog, {
         title: _t("Demote yourself?"),
         description:
@@ -727,7 +733,7 @@ const MuteToggleButton: React.FC<IBaseRoomProps> = ({member, room, powerLevels,
         // if muting self, warn as it may be irreversible
         if (target === cli.getUserId()) {
             try {
-                if (!(await warnSelfDemote(room?.isSpaceRoom()))) return;
+                if (!(await warnSelfDemote(SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom()))) return;
             } catch (e) {
                 console.error("Failed to warn about self demotion: ", e);
                 return;
@@ -816,7 +822,7 @@ const RoomAdminToolsContainer: React.FC<IBaseRoomProps> = ({
     if (canAffectUser && me.powerLevel >= kickPowerLevel) {
         kickButton = <RoomKickButton member={member} startUpdating={startUpdating} stopUpdating={stopUpdating} />;
     }
-    if (me.powerLevel >= redactPowerLevel && !room.isSpaceRoom()) {
+    if (me.powerLevel >= redactPowerLevel && (!SettingsStore.getValue("feature_spaces") || !room.isSpaceRoom())) {
         redactButton = (
             <RedactMessagesButton member={member} startUpdating={startUpdating} stopUpdating={stopUpdating} />
         );
@@ -1095,7 +1101,7 @@ const PowerLevelEditor: React.FC<{
         } else if (myUserId === target) {
             // If we are changing our own PL it can only ever be decreasing, which we cannot reverse.
             try {
-                if (!(await warnSelfDemote(room?.isSpaceRoom()))) return;
+                if (!(await warnSelfDemote(SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom()))) return;
             } catch (e) {
                 console.error("Failed to warn about self demotion: ", e);
             }
@@ -1325,10 +1331,10 @@ const BasicUserInfo: React.FC<{
     if (!isRoomEncrypted) {
         if (!cryptoEnabled) {
             text = _t("This client does not support end-to-end encryption.");
-        } else if (room && !room.isSpaceRoom()) {
+        } else if (room && (!SettingsStore.getValue("feature_spaces") || !room.isSpaceRoom())) {
             text = _t("Messages in this room are not end-to-end encrypted.");
         }
-    } else if (!room.isSpaceRoom()) {
+    } else if (!SettingsStore.getValue("feature_spaces") || !room.isSpaceRoom()) {
         text = _t("Messages in this room are end-to-end encrypted.");
     }
 
@@ -1405,7 +1411,7 @@ const BasicUserInfo: React.FC<{
             canInvite={roomPermissions.canInvite}
             isIgnored={isIgnored}
             member={member}
-            isSpace={room?.isSpaceRoom()}
+            isSpace={SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom()}
         />
 
         { adminToolsContainer }
@@ -1567,7 +1573,7 @@ const UserInfo: React.FC<Props> = ({
         previousPhase = RightPanelPhases.RoomMemberInfo;
         refireParams = {member: member};
     } else if (room) {
-        previousPhase = previousPhase = room.isSpaceRoom()
+        previousPhase = previousPhase = SettingsStore.getValue("feature_spaces") && room.isSpaceRoom()
             ? RightPanelPhases.SpaceMemberList
             : RightPanelPhases.RoomMemberList;
     }
@@ -1616,7 +1622,7 @@ const UserInfo: React.FC<Props> = ({
     }
 
     let scopeHeader;
-    if (room?.isSpaceRoom()) {
+    if (SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom()) {
         scopeHeader = <div className="mx_RightPanel_scopeHeader">
             <RoomAvatar room={room} height={32} width={32} />
             <RoomName room={room} />

src/components/views/room_settings/AliasSettings.js

@@ -310,9 +310,14 @@ export default class AliasSettings extends React.Component {
         let found = false;
         const canonicalValue = this.state.canonicalAlias || "";
         const canonicalAliasSection = (
-            <Field onChange={this.onCanonicalAliasChange} value={canonicalValue}
-                   disabled={this.state.updatingCanonicalAlias || !this.props.canSetCanonicalAlias}
-                   element='select' id='canonicalAlias' label={_t('Main address')}>
+            <Field
+                onChange={this.onCanonicalAliasChange}
+                value={canonicalValue}
+                disabled={this.state.updatingCanonicalAlias || !this.props.canSetCanonicalAlias}
+                element='select'
+                id='canonicalAlias'
+                label={_t('Main address')}
+            >
                 <option value="" key="unset">{ _t('not specified') }</option>
                 {
                     this._getAliases().map((alias, i) => {
@@ -326,9 +331,9 @@ export default class AliasSettings extends React.Component {
                 }
                 {
                     found || !this.state.canonicalAlias ? '' :
-                    <option value={ this.state.canonicalAlias } key='arbitrary'>
-                        { this.state.canonicalAlias }
-                    </option>
+                        <option value={ this.state.canonicalAlias } key='arbitrary'>
+                            { this.state.canonicalAlias }
+                        </option>
                 }
             </Field>
         );

src/components/views/room_settings/RoomProfileSettings.js

@@ -205,16 +205,34 @@ export default class RoomProfileSettings extends React.Component {
                 noValidate={true}
                 className="mx_ProfileSettings_profileForm"
             >
-                <input type="file" ref={this._avatarUpload} className="mx_ProfileSettings_avatarUpload"
-                       onChange={this._onAvatarChanged} accept="image/*" />
+                <input
+                    type="file"
+                    ref={this._avatarUpload}
+                    className="mx_ProfileSettings_avatarUpload"
+                    onChange={this._onAvatarChanged}
+                    accept="image/*"
+                />
                 <div className="mx_ProfileSettings_profile">
                     <div className="mx_ProfileSettings_controls">
-                        <Field label={_t("Room Name")}
-                               type="text" value={this.state.displayName} autoComplete="off"
-                               onChange={this._onDisplayNameChanged} disabled={!this.state.canSetName} />
-                        <Field className="mx_ProfileSettings_controls_topic" id="profileTopic" label={_t("Room Topic")} disabled={!this.state.canSetTopic}
-                               type="text" value={this.state.topic} autoComplete="off"
-                               onChange={this._onTopicChanged} element="textarea" />
+                        <Field
+                            label={_t("Room Name")}
+                            type="text"
+                            value={this.state.displayName}
+                            autoComplete="off"
+                            onChange={this._onDisplayNameChanged}
+                            disabled={!this.state.canSetName}
+                        />
+                        <Field
+                            className="mx_ProfileSettings_controls_topic"
+                            id="profileTopic"
+                            label={_t("Room Topic")}
+                            disabled={!this.state.canSetTopic}
+                            type="text"
+                            value={this.state.topic}
+                            autoComplete="off"
+                            onChange={this._onTopicChanged}
+                            element="textarea"
+                        />
                     </div>
                     <AvatarSetting
                         avatarUrl={this.state.avatarUrl}

src/components/views/room_settings/UrlPreviewSettings.js

@@ -68,10 +68,12 @@ export default class UrlPreviewSettings extends React.Component {
             if (SettingsStore.canSetValue("urlPreviewsEnabled", roomId, "room")) {
                 previewsForRoom = (
                     <label>
-                        <SettingsFlag name="urlPreviewsEnabled"
-                                      level={SettingLevel.ROOM}
-                                      roomId={roomId}
-                                      isExplicit={true} />
+                        <SettingsFlag
+                            name="urlPreviewsEnabled"
+                            level={SettingLevel.ROOM}
+                            roomId={roomId}
+                            isExplicit={true}
+                        />
                     </label>
                 );
             } else {
@@ -91,8 +93,8 @@ export default class UrlPreviewSettings extends React.Component {
 
         const previewsForRoomAccount = ( // in an e2ee room we use a special key to enforce per-room opt-in
             <SettingsFlag name={isEncrypted ? 'urlPreviewsEnabled_e2ee' : 'urlPreviewsEnabled'}
-                          level={SettingLevel.ROOM_ACCOUNT}
-                          roomId={roomId} />
+                level={SettingLevel.ROOM_ACCOUNT}
+                roomId={roomId} />
         );
 
         return (

src/components/views/rooms/Autocomplete.tsx

@@ -26,6 +26,7 @@ import Autocompleter from '../../../autocomplete/Autocompleter';
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 
 const COMPOSER_SELECTED = 0;
+const MAX_PROVIDER_MATCHES = 20;
 
 export const generateCompletionDomId = (number) => `mx_Autocomplete_Completion_${number}`;
 
@@ -136,7 +137,7 @@ export default class Autocomplete extends React.PureComponent<IProps, IState> {
 
     processQuery(query: string, selection: ISelectionRange) {
         return this.autocompleter.getCompletions(
-            query, selection, this.state.forceComplete,
+            query, selection, this.state.forceComplete, MAX_PROVIDER_MATCHES,
         ).then((completions) => {
             // Only ever process the completions for the most recent query being processed
             if (query !== this.queryRequested) {

src/components/views/rooms/EditMessageComposer.js

@@ -16,7 +16,7 @@ limitations under the License.
 */
 import React from 'react';
 import * as sdk from '../../../index';
-import {_t} from '../../../languageHandler';
+import {_t, _td} from '../../../languageHandler';
 import PropTypes from 'prop-types';
 import dis from '../../../dispatcher/dispatcher';
 import EditorModel from '../../../editor/model';
@@ -24,16 +24,19 @@ import {getCaretOffsetAndText} from '../../../editor/dom';
 import {htmlSerializeIfNeeded, textSerialize, containsEmote, stripEmoteCommand} from '../../../editor/serialize';
 import {findEditableEvent} from '../../../utils/EventUtils';
 import {parseEvent} from '../../../editor/deserialize';
-import {PartCreator} from '../../../editor/parts';
+import {CommandPartCreator} from '../../../editor/parts';
 import EditorStateTransfer from '../../../utils/EditorStateTransfer';
 import classNames from 'classnames';
 import {EventStatus} from 'matrix-js-sdk/src/models/event';
 import BasicMessageComposer from "./BasicMessageComposer";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import {CommandCategories, getCommand} from '../../../SlashCommands';
 import {Action} from "../../../dispatcher/actions";
 import CountlyAnalytics from "../../../CountlyAnalytics";
 import {getKeyBindingsManager, MessageComposerAction} from '../../../KeyBindingsManager';
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import SendHistoryManager from '../../../SendHistoryManager';
+import Modal from '../../../Modal';
 
 function _isReply(mxEvent) {
     const relatesTo = mxEvent.getContent()["m.relates_to"];
@@ -120,6 +123,7 @@ export default class EditMessageComposer extends React.Component {
             saveDisabled: true,
         };
         this._createEditorModel();
+        window.addEventListener("beforeunload", this._saveStoredEditorState);
     }
 
     _setEditorRef = ref => {
@@ -173,11 +177,71 @@ export default class EditMessageComposer extends React.Component {
         }
     }
 
+    get _editorRoomKey() {
+        return `mx_edit_room_${this._getRoom().roomId}`;
+    }
+
+    get _editorStateKey() {
+        return `mx_edit_state_${this.props.editState.getEvent().getId()}`;
+    }
+
     _cancelEdit = () => {
+        this._clearStoredEditorState();
         dis.dispatch({action: "edit_event", event: null});
         dis.fire(Action.FocusComposer);
     }
 
+    get _shouldSaveStoredEditorState() {
+        return localStorage.getItem(this._editorRoomKey) !== null;
+    }
+
+    _restoreStoredEditorState(partCreator) {
+        const json = localStorage.getItem(this._editorStateKey);
+        if (json) {
+            try {
+                const {parts: serializedParts} = JSON.parse(json);
+                const parts = serializedParts.map(p => partCreator.deserializePart(p));
+                return parts;
+            } catch (e) {
+                console.error("Error parsing editing state: ", e);
+            }
+        }
+    }
+
+    _clearStoredEditorState() {
+        localStorage.removeItem(this._editorRoomKey);
+        localStorage.removeItem(this._editorStateKey);
+    }
+
+    _clearPreviousEdit() {
+        if (localStorage.getItem(this._editorRoomKey)) {
+            localStorage.removeItem(`mx_edit_state_${localStorage.getItem(this._editorRoomKey)}`);
+        }
+    }
+
+    _saveStoredEditorState() {
+        const item = SendHistoryManager.createItem(this.model);
+        this._clearPreviousEdit();
+        localStorage.setItem(this._editorRoomKey, this.props.editState.getEvent().getId());
+        localStorage.setItem(this._editorStateKey, JSON.stringify(item));
+    }
+
+    _isSlashCommand() {
+        const parts = this.model.parts;
+        const firstPart = parts[0];
+        if (firstPart) {
+            if (firstPart.type === "command" && firstPart.text.startsWith("/") && !firstPart.text.startsWith("//")) {
+                return true;
+            }
+
+            if (firstPart.text.startsWith("/") && !firstPart.text.startsWith("//")
+                && (firstPart.type === "plain" || firstPart.type === "pill-candidate")) {
+                return true;
+            }
+        }
+        return false;
+    }
+
     _isContentModified(newContent) {
         // if nothing has changed then bail
         const oldContent = this.props.editState.getEvent().getContent();
@@ -190,19 +254,114 @@ export default class EditMessageComposer extends React.Component {
         return true;
     }
 
-    _sendEdit = () => {
+    _getSlashCommand() {
+        const commandText = this.model.parts.reduce((text, part) => {
+            // use mxid to textify user pills in a command
+            if (part.type === "user-pill") {
+                return text + part.resourceId;
+            }
+            return text + part.text;
+        }, "");
+        const {cmd, args} = getCommand(commandText);
+        return [cmd, args, commandText];
+    }
+
+    async _runSlashCommand(cmd, args, roomId) {
+        const result = cmd.run(roomId, args);
+        let messageContent;
+        let error = result.error;
+        if (result.promise) {
+            try {
+                if (cmd.category === CommandCategories.messages) {
+                    messageContent = await result.promise;
+                } else {
+                    await result.promise;
+                }
+            } catch (err) {
+                error = err;
+            }
+        }
+        if (error) {
+            console.error("Command failure: %s", error);
+            const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
+            // assume the error is a server error when the command is async
+            const isServerError = !!result.promise;
+            const title = isServerError ? _td("Server error") : _td("Command error");
+
+            let errText;
+            if (typeof error === 'string') {
+                errText = error;
+            } else if (error.message) {
+                errText = error.message;
+            } else {
+                errText = _t("Server unavailable, overloaded, or something else went wrong.");
+            }
+
+            Modal.createTrackedDialog(title, '', ErrorDialog, {
+                title: _t(title),
+                description: errText,
+            });
+        } else {
+            console.log("Command success.");
+            if (messageContent) return messageContent;
+        }
+    }
+
+    _sendEdit = async () => {
         const startTime = CountlyAnalytics.getTimestamp();
         const editedEvent = this.props.editState.getEvent();
         const editContent = createEditContent(this.model, editedEvent);
         const newContent = editContent["m.new_content"];
 
+        let shouldSend = true;
+
         // If content is modified then send an updated event into the room
         if (this._isContentModified(newContent)) {
             const roomId = editedEvent.getRoomId();
-            this._cancelPreviousPendingEdit();
-            const prom = this.context.sendMessage(roomId, editContent);
-            dis.dispatch({action: "message_sent"});
-            CountlyAnalytics.instance.trackSendMessage(startTime, prom, roomId, true, false, editContent);
+            if (!containsEmote(this.model) && this._isSlashCommand()) {
+                const [cmd, args, commandText] = this._getSlashCommand();
+                if (cmd) {
+                    if (cmd.category === CommandCategories.messages) {
+                        editContent["m.new_content"] = await this._runSlashCommand(cmd, args, roomId);
+                    } else {
+                        this._runSlashCommand(cmd, args, roomId);
+                        shouldSend = false;
+                    }
+                } else {
+                    // ask the user if their unknown command should be sent as a message
+                    const QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+                    const {finished} = Modal.createTrackedDialog("Unknown command", "", QuestionDialog, {
+                        title: _t("Unknown Command"),
+                        description: <div>
+                            <p>
+                                { _t("Unrecognised command: %(commandText)s", {commandText}) }
+                            </p>
+                            <p>
+                                { _t("You can use <code>/help</code> to list available commands. " +
+                                    "Did you mean to send this as a message?", {}, {
+                                    code: t => <code>{ t }</code>,
+                                }) }
+                            </p>
+                            <p>
+                                { _t("Hint: Begin your message with <code>//</code> to start it with a slash.", {}, {
+                                    code: t => <code>{ t }</code>,
+                                }) }
+                            </p>
+                        </div>,
+                        button: _t('Send as message'),
+                    });
+                    const [sendAnyway] = await finished;
+                    // if !sendAnyway bail to let the user edit the composer and try again
+                    if (!sendAnyway) return;
+                }
+            }
+            if (shouldSend) {
+                this._cancelPreviousPendingEdit();
+                const prom = this.context.sendMessage(roomId, editContent);
+                this._clearStoredEditorState();
+                dis.dispatch({action: "message_sent"});
+                CountlyAnalytics.instance.trackSendMessage(startTime, prom, roomId, true, false, editContent);
+            }
         }
 
         // close the event editing and focus composer
@@ -235,22 +394,27 @@ export default class EditMessageComposer extends React.Component {
         // then when mounting the editor again with the same editor state,
         // it will set the cursor at the end.
         this.props.editState.setEditorState(caret, parts);
+        window.removeEventListener("beforeunload", this._saveStoredEditorState);
+        if (this._shouldSaveStoredEditorState) {
+            this._saveStoredEditorState();
+        }
     }
 
     _createEditorModel() {
         const {editState} = this.props;
         const room = this._getRoom();
-        const partCreator = new PartCreator(room, this.context);
+        const partCreator = new CommandPartCreator(room, this.context);
         let parts;
         if (editState.hasEditorState()) {
             // if restoring state from a previous editor,
             // restore serialized parts from the state
             parts = editState.getSerializedParts().map(p => partCreator.deserializePart(p));
         } else {
-            // otherwise, parse the body of the event
-            parts = parseEvent(editState.getEvent(), partCreator);
+            //otherwise, either restore serialized parts from localStorage or parse the body of the event
+            parts = this._restoreStoredEditorState(partCreator) || parseEvent(editState.getEvent(), partCreator);
         }
         this.model = new EditorModel(parts, partCreator);
+        this._saveStoredEditorState();
     }
 
     _getInitialCaretPosition() {

src/components/views/rooms/EntityTile.js

@@ -176,8 +176,11 @@ class EntityTile extends React.Component {
         // The wrapping div is required to make the magic mouse listener work, for some reason.
         return (
             <div ref={(c) => this.container = c} >
-                <AccessibleButton className={classNames(mainClassNames)} title={this.props.title}
-                                  onClick={this.props.onClick}>
+                <AccessibleButton
+                    className={classNames(mainClassNames)}
+                    title={this.props.title}
+                    onClick={this.props.onClick}
+                >
                     <div className="mx_EntityTile_avatar">
                         { av }
                         { e2eIcon }

src/components/views/rooms/EventTile.tsx

@@ -1,6 +1,6 @@
 /*
+Copyright 2015-2021 The Matrix.org Foundation C.I.C.
 Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
-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.
@@ -15,11 +15,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, {createRef} from 'react';
-import PropTypes from 'prop-types';
+import React from 'react';
 import classNames from "classnames";
-import {EventType} from "matrix-js-sdk/src/@types/event";
-import {EventStatus} from 'matrix-js-sdk/src/models/event';
+
+import { EventType } from "matrix-js-sdk/src/@types/event";
+import { EventStatus, MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { Relations } from "matrix-js-sdk/src/models/relations";
+import { RoomMember } from "matrix-js-sdk/src/models/room-member";
 
 import ReplyThread from "../elements/ReplyThread";
 import { _t } from '../../../languageHandler';
@@ -27,7 +29,7 @@ import * as TextForEvent from "../../../TextForEvent";
 import * as sdk from "../../../index";
 import dis from '../../../dispatcher/dispatcher';
 import SettingsStore from "../../../settings/SettingsStore";
-import {Layout, LayoutPropType} from "../../../settings/Layout";
+import {Layout} from "../../../settings/Layout";
 import {formatTime} from "../../../DateUtils";
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import {ALL_RULE_TYPES} from "../../../mjolnir/BanList";
@@ -40,6 +42,8 @@ import {WIDGET_LAYOUT_EVENT_TYPE} from "../../../stores/widgets/WidgetLayoutStor
 import {objectHasDiff} from "../../../utils/objects";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import Tooltip from "../elements/Tooltip";
+import { EditorStateTransfer } from "../../../utils/EditorStateTransfer";
+import { RoomPermalinkCreator } from '../../../utils/permalinks/Permalinks';
 import {StaticNotificationState} from "../../../stores/notifications/StaticNotificationState";
 import NotificationBadge from "./NotificationBadge";
 
@@ -171,101 +175,130 @@ const MAX_READ_AVATARS = 5;
 // |    '--------------------------------------'              |
 // '----------------------------------------------------------'
 
+interface IReadReceiptProps {
+    userId: string;
+    roomMember: RoomMember;
+    ts: number;
+}
+
+interface IProps {
+    // the MatrixEvent to show
+    mxEvent: MatrixEvent;
+
+    // true if mxEvent is redacted. This is a prop because using mxEvent.isRedacted()
+    // might not be enough when deciding shouldComponentUpdate - prevProps.mxEvent
+    // references the same this.props.mxEvent.
+    isRedacted?: boolean;
+
+    // true if this is a continuation of the previous event (which has the
+    // effect of not showing another avatar/displayname
+    continuation?: boolean;
+
+    // true if this is the last event in the timeline (which has the effect
+    // of always showing the timestamp)
+    last?: boolean;
+
+    // true if the event is the last event in a section (adds a css class for
+    // targeting)
+    lastInSection?: boolean;
+
+    // True if the event is the last successful (sent) event.
+    lastSuccessful?: boolean;
+
+    // true if this is search context (which has the effect of greying out
+    // the text
+    contextual?: boolean;
+
+    // a list of words to highlight, ordered by longest first
+    highlights?: string[];
+
+    // link URL for the highlights
+    highlightLink?: string;
+
+    // should show URL previews for this event
+    showUrlPreview?: boolean;
+
+    // is this the focused event
+    isSelectedEvent?: boolean;
+
+    // callback called when dynamic content in events are loaded
+    onHeightChanged?: () => void;
+
+    // a list of read-receipts we should show. Each object has a 'roomMember' and 'ts'.
+    readReceipts?: IReadReceiptProps[];
+
+    // opaque readreceipt info for each userId; used by ReadReceiptMarker
+    // to manage its animations. Should be an empty object when the room
+    // first loads
+    readReceiptMap?: any;
+
+    // A function which is used to check if the parent panel is being
+    // unmounted, to avoid unnecessary work. Should return true if we
+    // are being unmounted.
+    checkUnmounting?: () => boolean;
+
+    // the status of this event - ie, mxEvent.status. Denormalised to here so
+    // that we can tell when it changes.
+    eventSendStatus?: string;
+
+    // the shape of the tile. by default, the layout is intended for the
+    // normal room timeline.  alternative values are: "file_list", "file_grid"
+    // and "notif".  This could be done by CSS, but it'd be horribly inefficient.
+    // It could also be done by subclassing EventTile, but that'd be quite
+    // boiilerplatey.  So just make the necessary render decisions conditional
+    // for now.
+    tileShape?: 'notif' | 'file_grid' | 'reply' | 'reply_preview';
+
+    // show twelve hour timestamps
+    isTwelveHour?: boolean;
+
+    // helper function to access relations for this event
+    getRelationsForEvent?: (eventId: string, relationType: string, eventType: string) => Relations;
+
+    // whether to show reactions for this event
+    showReactions?: boolean;
+
+    // which layout to use
+    layout: Layout;
+
+    // whether or not to show flair at all
+    enableFlair?: boolean;
+
+    // whether or not to show read receipts
+    showReadReceipts?: boolean;
+
+    // Used while editing, to pass the event, and to preserve editor state
+    // from one editor instance to another when remounting the editor
+    // upon receiving the remote echo for an unsent event.
+    editState?: EditorStateTransfer;
+
+    // Event ID of the event replacing the content of this event, if any
+    replacingEventId?: string;
+
+    // Helper to build permalinks for the room
+    permalinkCreator?: RoomPermalinkCreator;
+}
+
+interface IState {
+    // Whether the action bar is focused.
+    actionBarFocused: boolean;
+    // Whether all read receipts are being displayed. If not, only display
+    // a truncation of them.
+    allReadAvatars: boolean;
+    // Whether the event's sender has been verified.
+    verified: string;
+    // Whether onRequestKeysClick has been called since mounting.
+    previouslyRequestedKeys: boolean;
+    // The Relations model from the JS SDK for reactions to `mxEvent`
+    reactions: Relations;
+}
+
 @replaceableComponent("views.rooms.EventTile")
-export default class EventTile extends React.Component {
-    static propTypes = {
-        /* the MatrixEvent to show */
-        mxEvent: PropTypes.object.isRequired,
-
-        /* true if mxEvent is redacted. This is a prop because using mxEvent.isRedacted()
-         * might not be enough when deciding shouldComponentUpdate - prevProps.mxEvent
-         * references the same this.props.mxEvent.
-         */
-        isRedacted: PropTypes.bool,
-
-        /* true if this is a continuation of the previous event (which has the
-         * effect of not showing another avatar/displayname
-         */
-        continuation: PropTypes.bool,
-
-        /* true if this is the last event in the timeline (which has the effect
-         * of always showing the timestamp)
-         */
-        last: PropTypes.bool,
-
-        // true if the event is the last event in a section (adds a css class for
-        // targeting)
-        lastInSection: PropTypes.bool,
-
-        // True if the event is the last successful (sent) event.
-        isLastSuccessful: PropTypes.bool,
-
-        /* true if this is search context (which has the effect of greying out
-         * the text
-         */
-        contextual: PropTypes.bool,
-
-        /* a list of words to highlight, ordered by longest first */
-        highlights: PropTypes.array,
-
-        /* link URL for the highlights */
-        highlightLink: PropTypes.string,
-
-        /* should show URL previews for this event */
-        showUrlPreview: PropTypes.bool,
-
-        /* is this the focused event */
-        isSelectedEvent: PropTypes.bool,
-
-        /* callback called when dynamic content in events are loaded */
-        onHeightChanged: PropTypes.func,
-
-        /* a list of read-receipts we should show. Each object has a 'roomMember' and 'ts'. */
-        readReceipts: PropTypes.arrayOf(PropTypes.object),
-
-        /* opaque readreceipt info for each userId; used by ReadReceiptMarker
-         * to manage its animations. Should be an empty object when the room
-         * first loads
-         */
-        readReceiptMap: PropTypes.object,
-
-        /* A function which is used to check if the parent panel is being
-         * unmounted, to avoid unnecessary work. Should return true if we
-         * are being unmounted.
-         */
-        checkUnmounting: PropTypes.func,
-
-        /* the status of this event - ie, mxEvent.status. Denormalised to here so
-         * that we can tell when it changes. */
-        eventSendStatus: PropTypes.string,
-
-        /* the shape of the tile. by default, the layout is intended for the
-         * normal room timeline.  alternative values are: "file_list", "file_grid"
-         * and "notif".  This could be done by CSS, but it'd be horribly inefficient.
-         * It could also be done by subclassing EventTile, but that'd be quite
-         * boiilerplatey.  So just make the necessary render decisions conditional
-         * for now.
-         */
-        tileShape: PropTypes.string,
-
-        // show twelve hour timestamps
-        isTwelveHour: PropTypes.bool,
-
-        // helper function to access relations for this event
-        getRelationsForEvent: PropTypes.func,
-
-        // whether to show reactions for this event
-        showReactions: PropTypes.bool,
-
-        // which layout to use
-        layout: LayoutPropType,
-
-        // whether or not to show flair at all
-        enableFlair: PropTypes.bool,
-
-        // whether or not to show read receipts
-        showReadReceipts: PropTypes.bool,
-    };
+export default class EventTile extends React.Component<IProps, IState> {
+    private suppressReadReceiptAnimation: boolean;
+    private isListeningForReceipts: boolean;
+    private tile = React.createRef();
+    private replyThread = React.createRef();
 
     static defaultProps = {
         // no-op function because onHeightChanged is optional yet some sub-components assume its existence
@@ -292,26 +325,22 @@ export default class EventTile extends React.Component {
         };
 
         // don't do RR animations until we are mounted
-        this._suppressReadReceiptAnimation = true;
-
-        this._tile = createRef();
-        this._replyThread = createRef();
+        this.suppressReadReceiptAnimation = true;
 
         // Throughout the component we manage a read receipt listener to see if our tile still
         // qualifies for a "sent" or "sending" state (based on their relevant conditions). We
         // don't want to over-subscribe to the read receipt events being fired, so we use a flag
         // to determine if we've already subscribed and use a combination of other flags to find
         // out if we should even be subscribed at all.
-        this._isListeningForReceipts = false;
+        this.isListeningForReceipts = false;
     }
 
     /**
      * When true, the tile qualifies for some sort of special read receipt. This could be a 'sending'
      * or 'sent' receipt, for example.
      * @returns {boolean}
-     * @private
      */
-    get _isEligibleForSpecialReceipt() {
+    private get isEligibleForSpecialReceipt() {
         // First, if there are other read receipts then just short-circuit this.
         if (this.props.readReceipts && this.props.readReceipts.length > 0) return false;
         if (!this.props.mxEvent) return false;
@@ -340,9 +369,9 @@ export default class EventTile extends React.Component {
         return true;
     }
 
-    get _shouldShowSentReceipt() {
+    private get shouldShowSentReceipt() {
         // If we're not even eligible, don't show the receipt.
-        if (!this._isEligibleForSpecialReceipt) return false;
+        if (!this.isEligibleForSpecialReceipt) return false;
 
         // We only show the 'sent' receipt on the last successful event.
         if (!this.props.lastSuccessful) return false;
@@ -360,9 +389,9 @@ export default class EventTile extends React.Component {
         return true;
     }
 
-    get _shouldShowSendingReceipt() {
+    private get shouldShowSendingReceipt() {
         // If we're not even eligible, don't show the receipt.
-        if (!this._isEligibleForSpecialReceipt) return false;
+        if (!this.isEligibleForSpecialReceipt) return false;
 
         // Check the event send status to see if we are pending. Null/undefined status means the
         // message was sent, so check for that and 'sent' explicitly.
@@ -376,22 +405,22 @@ export default class EventTile extends React.Component {
     // TODO: [REACT-WARNING] Move into constructor
     // eslint-disable-next-line camelcase
     UNSAFE_componentWillMount() {
-        this._verifyEvent(this.props.mxEvent);
+        this.verifyEvent(this.props.mxEvent);
     }
 
     componentDidMount() {
-        this._suppressReadReceiptAnimation = false;
+        this.suppressReadReceiptAnimation = false;
         const client = this.context;
         client.on("deviceVerificationChanged", this.onDeviceVerificationChanged);
         client.on("userTrustStatusChanged", this.onUserVerificationChanged);
-        this.props.mxEvent.on("Event.decrypted", this._onDecrypted);
+        this.props.mxEvent.on("Event.decrypted", this.onDecrypted);
         if (this.props.showReactions) {
-            this.props.mxEvent.on("Event.relationsCreated", this._onReactionsCreated);
+            this.props.mxEvent.on("Event.relationsCreated", this.onReactionsCreated);
         }
 
-        if (this._shouldShowSentReceipt || this._shouldShowSendingReceipt) {
-            client.on("Room.receipt", this._onRoomReceipt);
-            this._isListeningForReceipts = true;
+        if (this.shouldShowSentReceipt || this.shouldShowSendingReceipt) {
+            client.on("Room.receipt", this.onRoomReceipt);
+            this.isListeningForReceipts = true;
         }
     }
 
@@ -401,7 +430,7 @@ export default class EventTile extends React.Component {
         // re-check the sender verification as outgoing events progress through
         // the send process.
         if (nextProps.eventSendStatus !== this.props.eventSendStatus) {
-            this._verifyEvent(nextProps.mxEvent);
+            this.verifyEvent(nextProps.mxEvent);
         }
     }
 
@@ -410,35 +439,35 @@ export default class EventTile extends React.Component {
             return true;
         }
 
-        return !this._propsEqual(this.props, nextProps);
+        return !this.propsEqual(this.props, nextProps);
     }
 
     componentWillUnmount() {
         const client = this.context;
         client.removeListener("deviceVerificationChanged", this.onDeviceVerificationChanged);
         client.removeListener("userTrustStatusChanged", this.onUserVerificationChanged);
-        client.removeListener("Room.receipt", this._onRoomReceipt);
-        this._isListeningForReceipts = false;
-        this.props.mxEvent.removeListener("Event.decrypted", this._onDecrypted);
+        client.removeListener("Room.receipt", this.onRoomReceipt);
+        this.isListeningForReceipts = false;
+        this.props.mxEvent.removeListener("Event.decrypted", this.onDecrypted);
         if (this.props.showReactions) {
-            this.props.mxEvent.removeListener("Event.relationsCreated", this._onReactionsCreated);
+            this.props.mxEvent.removeListener("Event.relationsCreated", this.onReactionsCreated);
         }
     }
 
     componentDidUpdate(prevProps, prevState, snapshot) {
         // If we're not listening for receipts and expect to be, register a listener.
-        if (!this._isListeningForReceipts && (this._shouldShowSentReceipt || this._shouldShowSendingReceipt)) {
-            this.context.on("Room.receipt", this._onRoomReceipt);
-            this._isListeningForReceipts = true;
+        if (!this.isListeningForReceipts && (this.shouldShowSentReceipt || this.shouldShowSendingReceipt)) {
+            this.context.on("Room.receipt", this.onRoomReceipt);
+            this.isListeningForReceipts = true;
         }
     }
 
-    _onRoomReceipt = (ev, room) => {
+    private onRoomReceipt = (ev, room) => {
         // ignore events for other rooms
         const tileRoom = MatrixClientPeg.get().getRoom(this.props.mxEvent.getRoomId());
         if (room !== tileRoom) return;
 
-        if (!this._shouldShowSentReceipt && !this._shouldShowSendingReceipt && !this._isListeningForReceipts) {
+        if (!this.shouldShowSentReceipt && !this.shouldShowSendingReceipt && !this.isListeningForReceipts) {
             return;
         }
 
@@ -446,36 +475,36 @@ export default class EventTile extends React.Component {
         // the getters we use here to determine what needs rendering.
         this.forceUpdate(() => {
             // Per elsewhere in this file, we can remove the listener once we will have no further purpose for it.
-            if (!this._shouldShowSentReceipt && !this._shouldShowSendingReceipt) {
-                this.context.removeListener("Room.receipt", this._onRoomReceipt);
-                this._isListeningForReceipts = false;
+            if (!this.shouldShowSentReceipt && !this.shouldShowSendingReceipt) {
+                this.context.removeListener("Room.receipt", this.onRoomReceipt);
+                this.isListeningForReceipts = false;
             }
         });
     };
 
     /** called when the event is decrypted after we show it.
      */
-    _onDecrypted = () => {
+    private onDecrypted = () => {
         // we need to re-verify the sending device.
-        // (we call onHeightChanged in _verifyEvent to handle the case where decryption
+        // (we call onHeightChanged in verifyEvent to handle the case where decryption
         // has caused a change in size of the event tile)
-        this._verifyEvent(this.props.mxEvent);
+        this.verifyEvent(this.props.mxEvent);
         this.forceUpdate();
     };
 
-    onDeviceVerificationChanged = (userId, device) => {
+    private onDeviceVerificationChanged = (userId, device) => {
         if (userId === this.props.mxEvent.getSender()) {
-            this._verifyEvent(this.props.mxEvent);
+            this.verifyEvent(this.props.mxEvent);
         }
     };
 
-    onUserVerificationChanged = (userId, _trustStatus) => {
+    private onUserVerificationChanged = (userId, _trustStatus) => {
         if (userId === this.props.mxEvent.getSender()) {
-            this._verifyEvent(this.props.mxEvent);
+            this.verifyEvent(this.props.mxEvent);
         }
     };
 
-    async _verifyEvent(mxEvent) {
+    private async verifyEvent(mxEvent) {
         if (!mxEvent.isEncrypted()) {
             return;
         }
@@ -529,7 +558,7 @@ export default class EventTile extends React.Component {
         }, this.props.onHeightChanged); // Decryption may have caused a change in size
     }
 
-    _propsEqual(objA, objB) {
+    private propsEqual(objA, objB) {
         const keysA = Object.keys(objA);
         const keysB = Object.keys(objB);
 
@@ -596,7 +625,7 @@ export default class EventTile extends React.Component {
     };
 
     getReadAvatars() {
-        if (this._shouldShowSentReceipt || this._shouldShowSendingReceipt) {
+        if (this.shouldShowSentReceipt || this.shouldShowSendingReceipt) {
             return <SentReceipt messageState={this.props.mxEvent.getAssociatedStatus()} />;
         }
 
@@ -643,7 +672,7 @@ export default class EventTile extends React.Component {
                     leftOffset={left} hidden={hidden}
                     readReceiptInfo={readReceiptInfo}
                     checkUnmounting={this.props.checkUnmounting}
-                    suppressAnimation={this._suppressReadReceiptAnimation}
+                    suppressAnimation={this.suppressReadReceiptAnimation}
                     onClick={this.toggleAllReadAvatars}
                     timestamp={receipt.ts}
                     showTwelveHour={this.props.isTwelveHour}
@@ -700,7 +729,7 @@ export default class EventTile extends React.Component {
         });
     };
 
-    _renderE2EPadlock() {
+    private renderE2EPadlock() {
         const ev = this.props.mxEvent;
 
         // event could not be decrypted
@@ -749,9 +778,9 @@ export default class EventTile extends React.Component {
         });
     };
 
-    getTile = () => this._tile.current;
+    getTile = () => this.tile.current;
 
-    getReplyThread = () => this._replyThread.current;
+    getReplyThread = () => this.replyThread.current;
 
     getReactions = () => {
         if (
@@ -771,11 +800,11 @@ export default class EventTile extends React.Component {
         return this.props.getRelationsForEvent(eventId, "m.annotation", "m.reaction");
     };
 
-    _onReactionsCreated = (relationType, eventType) => {
+    private onReactionsCreated = (relationType, eventType) => {
         if (relationType !== "m.annotation" || eventType !== "m.reaction") {
             return;
         }
-        this.props.mxEvent.removeListener("Event.relationsCreated", this._onReactionsCreated);
+        this.props.mxEvent.removeListener("Event.relationsCreated", this.onReactionsCreated);
         this.setState({
             reactions: this.getReactions(),
         });
@@ -896,7 +925,7 @@ export default class EventTile extends React.Component {
             // so that the correct avatar is shown as the text is
             // `$target accepted the invitation for $email`
             if (this.props.mxEvent.getContent().third_party_invite) {
-               member = this.props.mxEvent.target;
+                member = this.props.mxEvent.target;
             } else {
                 member = this.props.mxEvent.sender;
             }
@@ -913,8 +942,9 @@ export default class EventTile extends React.Component {
         if (needsSenderProfile) {
             if (!this.props.tileShape || this.props.tileShape === 'reply' || this.props.tileShape === 'reply_preview') {
                 sender = <SenderProfile onClick={this.onSenderProfileClick}
-                                        mxEvent={this.props.mxEvent}
-                                        enableFlair={this.props.enableFlair} />;
+                    mxEvent={this.props.mxEvent}
+                    enableFlair={this.props.enableFlair}
+                />;
             } else {
                 sender = <SenderProfile mxEvent={this.props.mxEvent} enableFlair={this.props.enableFlair} />;
             }
@@ -977,18 +1007,18 @@ export default class EventTile extends React.Component {
         }
 
         const linkedTimestamp = <a
-                href={permalink}
-                onClick={this.onPermalinkClicked}
-                aria-label={formatTime(new Date(this.props.mxEvent.getTs()), this.props.isTwelveHour)}
-            >
-                { timestamp }
-            </a>;
+            href={permalink}
+            onClick={this.onPermalinkClicked}
+            aria-label={formatTime(new Date(this.props.mxEvent.getTs()), this.props.isTwelveHour)}
+        >
+            { timestamp }
+        </a>;
 
         const useIRCLayout = this.props.layout == Layout.IRC;
         const groupTimestamp = !useIRCLayout ? linkedTimestamp : null;
         const ircTimestamp = useIRCLayout ? linkedTimestamp : null;
-        const groupPadlock = !useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
-        const ircPadlock = useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
+        const groupPadlock = !useIRCLayout && !isBubbleMessage && this.renderE2EPadlock();
+        const ircPadlock = useIRCLayout && !isBubbleMessage && this.renderE2EPadlock();
 
         let msgOption;
         if (this.props.showReadReceipts) {
@@ -1019,12 +1049,13 @@ export default class EventTile extends React.Component {
                             </a>
                         </div>
                         <div className="mx_EventTile_line">
-                            <EventTileType ref={this._tile}
-                                           mxEvent={this.props.mxEvent}
-                                           highlights={this.props.highlights}
-                                           highlightLink={this.props.highlightLink}
-                                           showUrlPreview={this.props.showUrlPreview}
-                                           onHeightChanged={this.props.onHeightChanged} />
+                            <EventTileType ref={this.tile}
+                                mxEvent={this.props.mxEvent}
+                                highlights={this.props.highlights}
+                                highlightLink={this.props.highlightLink}
+                                showUrlPreview={this.props.showUrlPreview}
+                                onHeightChanged={this.props.onHeightChanged}
+                            />
                         </div>
                     </div>
                 );
@@ -1033,13 +1064,14 @@ export default class EventTile extends React.Component {
                 return (
                     <div className={classes} aria-live={ariaLive} aria-atomic="true">
                         <div className="mx_EventTile_line">
-                            <EventTileType ref={this._tile}
-                                           mxEvent={this.props.mxEvent}
-                                           highlights={this.props.highlights}
-                                           highlightLink={this.props.highlightLink}
-                                           showUrlPreview={this.props.showUrlPreview}
-                                           tileShape={this.props.tileShape}
-                                           onHeightChanged={this.props.onHeightChanged} />
+                            <EventTileType ref={this.tile}
+                                mxEvent={this.props.mxEvent}
+                                highlights={this.props.highlights}
+                                highlightLink={this.props.highlightLink}
+                                showUrlPreview={this.props.showUrlPreview}
+                                tileShape={this.props.tileShape}
+                                onHeightChanged={this.props.onHeightChanged}
+                            />
                         </div>
                         <a
                             className="mx_EventTile_senderDetailsLink"
@@ -1063,7 +1095,7 @@ export default class EventTile extends React.Component {
                         this.props.mxEvent,
                         this.props.onHeightChanged,
                         this.props.permalinkCreator,
-                        this._replyThread,
+                        this.replyThread,
                     );
                 }
                 return (
@@ -1076,13 +1108,14 @@ export default class EventTile extends React.Component {
                             { groupTimestamp }
                             { groupPadlock }
                             { thread }
-                            <EventTileType ref={this._tile}
-                                           mxEvent={this.props.mxEvent}
-                                           highlights={this.props.highlights}
-                                           highlightLink={this.props.highlightLink}
-                                           onHeightChanged={this.props.onHeightChanged}
-                                           replacingEventId={this.props.replacingEventId}
-                                           showUrlPreview={false} />
+                            <EventTileType ref={this.tile}
+                                mxEvent={this.props.mxEvent}
+                                highlights={this.props.highlights}
+                                highlightLink={this.props.highlightLink}
+                                onHeightChanged={this.props.onHeightChanged}
+                                replacingEventId={this.props.replacingEventId}
+                                showUrlPreview={false}
+                            />
                         </div>
                     </div>
                 );
@@ -1092,7 +1125,7 @@ export default class EventTile extends React.Component {
                     this.props.mxEvent,
                     this.props.onHeightChanged,
                     this.props.permalinkCreator,
-                    this._replyThread,
+                    this.replyThread,
                     this.props.layout,
                 );
 
@@ -1106,15 +1139,16 @@ export default class EventTile extends React.Component {
                             { groupTimestamp }
                             { groupPadlock }
                             { thread }
-                            <EventTileType ref={this._tile}
-                                           mxEvent={this.props.mxEvent}
-                                           replacingEventId={this.props.replacingEventId}
-                                           editState={this.props.editState}
-                                           highlights={this.props.highlights}
-                                           highlightLink={this.props.highlightLink}
-                                           showUrlPreview={this.props.showUrlPreview}
-                                           permalinkCreator={this.props.permalinkCreator}
-                                           onHeightChanged={this.props.onHeightChanged} />
+                            <EventTileType ref={this.tile}
+                                mxEvent={this.props.mxEvent}
+                                replacingEventId={this.props.replacingEventId}
+                                editState={this.props.editState}
+                                highlights={this.props.highlights}
+                                highlightLink={this.props.highlightLink}
+                                showUrlPreview={this.props.showUrlPreview}
+                                permalinkCreator={this.props.permalinkCreator}
+                                onHeightChanged={this.props.onHeightChanged}
+                            />
                             { keyRequestInfo }
                             { reactionsRow }
                             { actionBar }
@@ -1183,18 +1217,26 @@ function E2ePadlockUnknown(props) {
 
 function E2ePadlockUnauthenticated(props) {
     return (
-        <E2ePadlock title={_t("The authenticity of this encrypted message can't be guaranteed on this device.")} icon="unauthenticated" {...props} />
+        <E2ePadlock
+            title={_t("The authenticity of this encrypted message can't be guaranteed on this device.")}
+            icon="unauthenticated"
+            {...props}
+        />
     );
 }
 
-class E2ePadlock extends React.Component {
-    static propTypes = {
-        icon: PropTypes.string.isRequired,
-        title: PropTypes.string.isRequired,
-    };
+interface IE2ePadlockProps {
+    icon: string;
+    title: string;
+}
 
-    constructor() {
-        super();
+interface IE2ePadlockState {
+    hover: boolean;
+}
+
+class E2ePadlock extends React.Component<IE2ePadlockProps, IE2ePadlockState> {
+    constructor(props) {
+        super(props);
 
         this.state = {
             hover: false,
@@ -1212,14 +1254,13 @@ class E2ePadlock extends React.Component {
     render() {
         let tooltip = null;
         if (this.state.hover) {
-            tooltip = <Tooltip className="mx_EventTile_e2eIcon_tooltip" label={this.props.title} dir="auto" />;
+            tooltip = <Tooltip className="mx_EventTile_e2eIcon_tooltip" label={this.props.title} />;
         }
 
         const classes = `mx_EventTile_e2eIcon mx_EventTile_e2eIcon_${this.props.icon}`;
         return (
             <div
                 className={classes}
-                onClick={this.onClick}
                 onMouseEnter={this.onHoverStart}
                 onMouseLeave={this.onHoverEnd}
             >{tooltip}</div>
@@ -1236,8 +1277,8 @@ interface ISentReceiptState {
 }
 
 class SentReceipt extends React.PureComponent<ISentReceiptProps, ISentReceiptState> {
-    constructor() {
-        super();
+    constructor(props) {
+        super(props);
 
         this.state = {
             hover: false,

src/components/views/rooms/LinkPreviewWidget.js

@@ -128,8 +128,8 @@ export default class LinkPreviewWidget extends React.Component {
         let img;
         if (image) {
             img = <div className="mx_LinkPreviewWidget_image" style={{ height: thumbHeight }}>
-                    <img style={{ maxWidth: imageMaxWidth, maxHeight: imageMaxHeight }} src={image} onClick={this.onImageClick} />
-                  </div>;
+                <img style={{ maxWidth: imageMaxWidth, maxHeight: imageMaxHeight }} src={image} onClick={this.onImageClick} />
+            </div>;
         }
 
         // The description includes &-encoded HTML entities, we decode those as React treats the thing as an

src/components/views/rooms/MemberList.js

@@ -30,6 +30,7 @@ import {RightPanelPhases} from "../../../stores/RightPanelStorePhases";
 import RoomAvatar from "../avatars/RoomAvatar";
 import RoomName from "../elements/RoomName";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import SettingsStore from "../../../settings/SettingsStore";
 
 const INITIAL_LOAD_NUM_MEMBERS = 30;
 const INITIAL_LOAD_NUM_INVITED = 5;
@@ -460,7 +461,7 @@ export default class MemberList extends React.Component {
             const chat = CommunityPrototypeStore.instance.getSelectedCommunityGeneralChat();
             if (chat && chat.roomId === this.props.roomId) {
                 inviteButtonText = _t("Invite to this community");
-            } else if (room.isSpaceRoom()) {
+            } else if (SettingsStore.getValue("feature_spaces") && room.isSpaceRoom()) {
                 inviteButtonText = _t("Invite to this space");
             }
 
@@ -492,7 +493,7 @@ export default class MemberList extends React.Component {
         let previousPhase = RightPanelPhases.RoomSummary;
         // We have no previousPhase for when viewing a MemberList from a Space
         let scopeHeader;
-        if (room?.isSpaceRoom()) {
+        if (SettingsStore.getValue("feature_spaces") && room?.isSpaceRoom()) {
             previousPhase = undefined;
             scopeHeader = <div className="mx_RightPanel_scopeHeader">
                 <RoomAvatar room={room} height={32} width={32} />

src/components/views/rooms/MessageComposer.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2015-2018, 2020, 2021 The Matrix.org Foundation C.I.C.
+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.
@@ -13,15 +13,18 @@ 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, {createRef} from 'react';
+import React from 'react';
 import classNames from 'classnames';
-import PropTypes from 'prop-types';
 import { _t } from '../../../languageHandler';
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import * as sdk from '../../../index';
+import {MatrixEvent} from "matrix-js-sdk/src/models/event";
+import {Room} from "matrix-js-sdk/src/models/room";
+import {RoomMember} from "matrix-js-sdk/src/models/room-member";
 import dis from '../../../dispatcher/dispatcher';
+import { ActionPayload } from "../../../dispatcher/payloads";
 import Stickerpicker from './Stickerpicker';
-import { makeRoomPermalink } from '../../../utils/permalinks/Permalinks';
+import { makeRoomPermalink, RoomPermalinkCreator } from '../../../utils/permalinks/Permalinks';
 import ContentMessages from '../../../ContentMessages';
 import E2EIcon from './E2EIcon';
 import SettingsStore from "../../../settings/SettingsStore";
@@ -35,19 +38,26 @@ import VoiceRecordComposerTile from "./VoiceRecordComposerTile";
 import {VoiceRecordingStore} from "../../../stores/VoiceRecordingStore";
 import {RecordingState} from "../../../voice/VoiceRecording";
 import Tooltip, {Alignment} from "../elements/Tooltip";
+import ResizeNotifier from "../../../utils/ResizeNotifier";
+import { E2EStatus } from '../../../utils/ShieldUtils';
+import SendMessageComposer from "./SendMessageComposer";
 
-function ComposerAvatar(props) {
+interface IComposerAvatarProps {
+    me: object;
+}
+
+function ComposerAvatar(props: IComposerAvatarProps) {
     const MemberStatusMessageAvatar = sdk.getComponent('avatars.MemberStatusMessageAvatar');
     return <div className="mx_MessageComposer_avatar">
         <MemberStatusMessageAvatar member={props.me} width={24} height={24} />
     </div>;
 }
 
-ComposerAvatar.propTypes = {
-    me: PropTypes.object.isRequired,
-};
+interface ISendButtonProps {
+    onClick: () => void;
+}
 
-function SendButton(props) {
+function SendButton(props: ISendButtonProps) {
     return (
         <AccessibleTooltipButton
             className="mx_MessageComposer_sendMessage"
@@ -57,10 +67,6 @@ function SendButton(props) {
     );
 }
 
-SendButton.propTypes = {
-    onClick: PropTypes.func.isRequired,
-};
-
 const EmojiButton = ({addEmoji}) => {
     const [menuDisplayed, button, openMenu, closeMenu] = useContextMenu();
 
@@ -68,7 +74,7 @@ const EmojiButton = ({addEmoji}) => {
     if (menuDisplayed) {
         const buttonRect = button.current.getBoundingClientRect();
         const EmojiPicker = sdk.getComponent('emojipicker.EmojiPicker');
-        contextMenu = <ContextMenu {...aboveLeftOf(buttonRect)} onFinished={closeMenu} catchTab={false}>
+        contextMenu = <ContextMenu {...aboveLeftOf(buttonRect)} onFinished={closeMenu} managed={false}>
             <EmojiPicker onChoose={addEmoji} showQuickReactions={true} />
         </ContextMenu>;
     }
@@ -98,39 +104,39 @@ const EmojiButton = ({addEmoji}) => {
     </React.Fragment>;
 };
 
-class UploadButton extends React.Component {
-    static propTypes = {
-        roomId: PropTypes.string.isRequired,
-    }
+interface IUploadButtonProps {
+    roomId: string;
+}
+
+class UploadButton extends React.Component<IUploadButtonProps> {
+    private uploadInput = React.createRef<HTMLInputElement>();
+    private dispatcherRef: string;
 
     constructor(props) {
         super(props);
-        this.onUploadClick = this.onUploadClick.bind(this);
-        this.onUploadFileInputChange = this.onUploadFileInputChange.bind(this);
 
-        this._uploadInput = createRef();
-        this._dispatcherRef = dis.register(this.onAction);
+        this.dispatcherRef = dis.register(this.onAction);
     }
 
     componentWillUnmount() {
-        dis.unregister(this._dispatcherRef);
+        dis.unregister(this.dispatcherRef);
     }
 
-    onAction = payload => {
+    private onAction = (payload: ActionPayload) => {
         if (payload.action === "upload_file") {
             this.onUploadClick();
         }
     };
 
-    onUploadClick(ev) {
+    private onUploadClick = () => {
         if (MatrixClientPeg.get().isGuest()) {
             dis.dispatch({action: 'require_registration'});
             return;
         }
-        this._uploadInput.current.click();
+        this.uploadInput.current.click();
     }
 
-    onUploadFileInputChange(ev) {
+    private onUploadFileInputChange = (ev: React.ChangeEvent<HTMLInputElement>) => {
         if (ev.target.files.length === 0) return;
 
         // take a copy so we can safely reset the value of the form control
@@ -160,7 +166,7 @@ class UploadButton extends React.Component {
                 title={_t('Upload file')}
             >
                 <input
-                    ref={this._uploadInput}
+                    ref={this.uploadInput}
                     type="file"
                     style={uploadInputStyle}
                     multiple
@@ -171,19 +177,35 @@ class UploadButton extends React.Component {
     }
 }
 
+interface IProps {
+    room: Room;
+    resizeNotifier: ResizeNotifier;
+    permalinkCreator: RoomPermalinkCreator;
+    replyToEvent?: MatrixEvent;
+    e2eStatus?: E2EStatus;
+}
+
+interface IState {
+    tombstone: MatrixEvent;
+    canSendMessages: boolean;
+    isComposerEmpty: boolean;
+    haveRecording: boolean;
+    recordingTimeLeftSeconds?: number;
+    me?: RoomMember;
+}
+
 @replaceableComponent("views.rooms.MessageComposer")
-export default class MessageComposer extends React.Component {
+export default class MessageComposer extends React.Component<IProps, IState> {
+    private dispatcherRef: string;
+    private messageComposerInput: SendMessageComposer;
+    private voiceRecordingButton: VoiceRecordComposerTile;
+
     constructor(props) {
         super(props);
-        this.onInputStateChanged = this.onInputStateChanged.bind(this);
-        this._onRoomStateEvents = this._onRoomStateEvents.bind(this);
-        this._onTombstoneClick = this._onTombstoneClick.bind(this);
-        this.renderPlaceholderText = this.renderPlaceholderText.bind(this);
-        VoiceRecordingStore.instance.on(UPDATE_EVENT, this._onVoiceStoreUpdate);
-        this._dispatcherRef = null;
+        VoiceRecordingStore.instance.on(UPDATE_EVENT, this.onVoiceStoreUpdate);
 
         this.state = {
-            tombstone: this._getRoomTombstone(),
+            tombstone: this.getRoomTombstone(),
             canSendMessages: this.props.room.maySendMessage(),
             isComposerEmpty: true,
             haveRecording: false,
@@ -191,7 +213,13 @@ export default class MessageComposer extends React.Component {
         };
     }
 
-    onAction = (payload) => {
+    componentDidMount() {
+        this.dispatcherRef = dis.register(this.onAction);
+        MatrixClientPeg.get().on("RoomState.events", this.onRoomStateEvents);
+        this.waitForOwnMember();
+    }
+
+    private onAction = (payload: ActionPayload) => {
         if (payload.action === 'reply_to_event') {
             // add a timeout for the reply preview to be rendered, so
             // that the ScrollPanel listening to the resizeNotifier can
@@ -203,13 +231,7 @@ export default class MessageComposer extends React.Component {
         }
     };
 
-    componentDidMount() {
-        this.dispatcherRef = dis.register(this.onAction);
-        MatrixClientPeg.get().on("RoomState.events", this._onRoomStateEvents);
-        this._waitForOwnMember();
-    }
-
-    _waitForOwnMember() {
+    private waitForOwnMember() {
         // if we have the member already, do that
         const me = this.props.room.getMember(MatrixClientPeg.get().getUserId());
         if (me) {
@@ -227,34 +249,28 @@ export default class MessageComposer extends React.Component {
 
     componentWillUnmount() {
         if (MatrixClientPeg.get()) {
-            MatrixClientPeg.get().removeListener("RoomState.events", this._onRoomStateEvents);
+            MatrixClientPeg.get().removeListener("RoomState.events", this.onRoomStateEvents);
         }
-        VoiceRecordingStore.instance.off(UPDATE_EVENT, this._onVoiceStoreUpdate);
+        VoiceRecordingStore.instance.off(UPDATE_EVENT, this.onVoiceStoreUpdate);
         dis.unregister(this.dispatcherRef);
     }
 
-    _onRoomStateEvents(ev, state) {
+    private onRoomStateEvents = (ev, state) => {
         if (ev.getRoomId() !== this.props.room.roomId) return;
 
         if (ev.getType() === 'm.room.tombstone') {
-            this.setState({tombstone: this._getRoomTombstone()});
+            this.setState({tombstone: this.getRoomTombstone()});
         }
         if (ev.getType() === 'm.room.power_levels') {
             this.setState({canSendMessages: this.props.room.maySendMessage()});
         }
     }
 
-    _getRoomTombstone() {
+    private getRoomTombstone() {
         return this.props.room.currentState.getStateEvents('m.room.tombstone', '');
     }
 
-    onInputStateChanged(inputState) {
-        // Merge the new input state with old to support partial updates
-        inputState = Object.assign({}, this.state.inputState, inputState);
-        this.setState({inputState});
-    }
-
-    _onTombstoneClick(ev) {
+    private onTombstoneClick = (ev) => {
         ev.preventDefault();
 
         const replacementRoomId = this.state.tombstone.getContent()['replacement_room'];
@@ -284,7 +300,7 @@ export default class MessageComposer extends React.Component {
         });
     }
 
-    renderPlaceholderText() {
+    private renderPlaceholderText = () => {
         if (this.props.replyToEvent) {
             if (this.props.e2eStatus) {
                 return _t('Send an encrypted reply…');
@@ -307,7 +323,15 @@ export default class MessageComposer extends React.Component {
         });
     }
 
-    sendMessage = () => {
+    sendMessage = async () => {
+        if (this.state.haveRecording && this.voiceRecordingButton) {
+            // There shouldn't be any text message to send when a voice recording is active, so
+            // just send out the voice recording.
+            await this.voiceRecordingButton.send();
+            return;
+        }
+
+        // XXX: Private function access
         this.messageComposerInput._sendMessage();
     }
 
@@ -317,7 +341,7 @@ export default class MessageComposer extends React.Component {
         });
     }
 
-    _onVoiceStoreUpdate = () => {
+    private onVoiceStoreUpdate = () => {
         const recording = VoiceRecordingStore.instance.activeRecording;
         this.setState({haveRecording: !!recording});
         if (recording) {
@@ -372,6 +396,7 @@ export default class MessageComposer extends React.Component {
             if (SettingsStore.getValue("feature_voice_messages")) {
                 controls.push(<VoiceRecordComposerTile
                     key="controls_voice_record"
+                    ref={c => this.voiceRecordingButton = c}
                     room={this.props.room} />);
             }
 
@@ -386,7 +411,7 @@ export default class MessageComposer extends React.Component {
             const continuesLink = replacementRoomId ? (
                 <a href={makeRoomPermalink(replacementRoomId)}
                     className="mx_MessageComposer_roomReplaced_link"
-                    onClick={this._onTombstoneClick}
+                    onClick={this.onTombstoneClick}
                 >
                     {_t("The conversation continues here.")}
                 </a>
@@ -394,7 +419,9 @@ export default class MessageComposer extends React.Component {
 
             controls.push(<div className="mx_MessageComposer_replaced_wrapper" key="room_replaced">
                 <div className="mx_MessageComposer_replaced_valign">
-                    <img className="mx_MessageComposer_roomReplaced_icon" src={require("../../../../res/img/room_replaced.svg")} />
+                    <img className="mx_MessageComposer_roomReplaced_icon"
+                        src={require("../../../../res/img/room_replaced.svg")}
+                    />
                     <span className="mx_MessageComposer_roomReplaced_header">
                         {_t("This room has been replaced and is no longer active.")}
                     </span><br />
@@ -431,14 +458,3 @@ export default class MessageComposer extends React.Component {
         );
     }
 }
-
-MessageComposer.propTypes = {
-    // js-sdk Room object
-    room: PropTypes.object.isRequired,
-
-    // string representing the current voip call state
-    callState: PropTypes.string,
-
-    // string representing the current room app drawer state
-    showApps: PropTypes.bool,
-};

src/components/views/rooms/PinnedEventTile.js

@@ -53,9 +53,9 @@ export default class PinnedEventTile extends React.Component {
             if (index !== -1) {
                 pinned.splice(index, 1);
                 MatrixClientPeg.get().sendStateEvent(this.props.mxRoom.roomId, 'm.room.pinned_events', {pinned}, '')
-                .then(() => {
-                    if (this.props.onUnpinned) this.props.onUnpinned();
-                });
+                    .then(() => {
+                        if (this.props.onUnpinned) this.props.onUnpinned();
+                    });
             } else if (this.props.onUnpinned) this.props.onUnpinned();
         }
     };
@@ -98,8 +98,11 @@ export default class PinnedEventTile extends React.Component {
                     { formatFullDate(new Date(this.props.mxEvent.getTs())) }
                 </span>
                 <div className="mx_PinnedEventTile_message">
-                    <MessageEvent mxEvent={this.props.mxEvent} className="mx_PinnedEventTile_body" maxImageHeight={150}
-                                  onHeightChanged={() => {}} // we need to give this, apparently
+                    <MessageEvent
+                        mxEvent={this.props.mxEvent}
+                        className="mx_PinnedEventTile_body"
+                        maxImageHeight={150}
+                        onHeightChanged={() => {}} // we need to give this, apparently
                     />
                 </div>
             </div>

src/components/views/rooms/PinnedEventsPanel.js

@@ -64,10 +64,10 @@ export default class PinnedEventsPanel extends React.Component {
 
             pinnedEvents.getContent().pinned.map((eventId) => {
                 promises.push(cli.getEventTimeline(this.props.room.getUnfilteredTimelineSet(), eventId, 0).then(
-                (timeline) => {
-                    const event = timeline.getEvents().find((e) => e.getId() === eventId);
-                    return {eventId, timeline, event};
-                }).catch((err) => {
+                    (timeline) => {
+                        const event = timeline.getEvents().find((e) => e.getId() === eventId);
+                        return {eventId, timeline, event};
+                    }).catch((err) => {
                     console.error("Error looking up pinned event " + eventId + " in room " + this.props.room.roomId);
                     console.error(err);
                     return null; // return lack of context to avoid unhandled errors
@@ -113,10 +113,14 @@ export default class PinnedEventsPanel extends React.Component {
         }
 
         return this.state.pinned.map((context) => {
-            return (<PinnedEventTile key={context.event.getId()}
-                                     mxRoom={this.props.room}
-                                     mxEvent={context.event}
-                                     onUnpinned={this._updatePinnedMessages} />);
+            return (
+                <PinnedEventTile
+                    key={context.event.getId()}
+                    mxRoom={this.props.room}
+                    mxEvent={context.event}
+                    onUnpinned={this._updatePinnedMessages}
+                />
+            );
         });
     }
 

src/components/views/rooms/ReadReceiptMarker.js

@@ -187,8 +187,7 @@ export default class ReadReceiptMarker extends React.PureComponent {
         }
 
         return (
-            <NodeAnimator
-                    startStyles={this.state.startStyles} >
+            <NodeAnimator startStyles={this.state.startStyles}>
                 <MemberAvatar
                     member={this.props.member}
                     fallbackUserId={this.props.fallbackUserId}

src/components/views/rooms/ReplyPreview.js

@@ -79,8 +79,13 @@ export default class ReplyPreview extends React.Component {
                     { _t('Replying') }
                 </div>
                 <div className="mx_ReplyPreview_header mx_ReplyPreview_cancel">
-                    <img className="mx_filterFlipColor" src={require("../../../../res/img/cancel.svg")} width="18" height="18"
-                         onClick={cancelQuoting} />
+                    <img
+                        className="mx_filterFlipColor"
+                        src={require("../../../../res/img/cancel.svg")}
+                        width="18"
+                        height="18"
+                        onClick={cancelQuoting}
+                    />
                 </div>
                 <div className="mx_ReplyPreview_clear" />
                 <EventTile

src/components/views/rooms/RoomBreadcrumbs.tsx

@@ -23,11 +23,9 @@ import defaultDispatcher from "../../../dispatcher/dispatcher";
 import Analytics from "../../../Analytics";
 import { UPDATE_EVENT } from "../../../stores/AsyncStore";
 import { CSSTransition } from "react-transition-group";
-import RoomListStore from "../../../stores/room-list/RoomListStore";
-import { DefaultTagID } from "../../../stores/room-list/models";
 import { RovingAccessibleTooltipButton } from "../../../accessibility/RovingTabIndex";
 import Toolbar from "../../../accessibility/Toolbar";
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
 
 interface IProps {
 }
@@ -84,8 +82,6 @@ export default class RoomBreadcrumbs extends React.PureComponent<IProps, IState>
 
     public render(): React.ReactElement {
         const tiles = BreadcrumbsStore.instance.rooms.map((r, i) => {
-            const roomTags = RoomListStore.instance.getTagsForRoom(r);
-            const roomTag = roomTags.includes(DefaultTagID.DM) ? DefaultTagID.DM : roomTags[0];
             return (
                 <RovingAccessibleTooltipButton
                     className="mx_RoomBreadcrumbs_crumb"
@@ -98,7 +94,6 @@ export default class RoomBreadcrumbs extends React.PureComponent<IProps, IState>
                     <DecoratedRoomAvatar
                         room={r}
                         avatarSize={32}
-                        tag={roomTag}
                         displayBadge={true}
                         forceCount={true}
                     />

src/components/views/rooms/RoomDetailRow.js

@@ -88,11 +88,11 @@ export default class RoomDetailRow extends React.Component {
         const name = room.name || getDisplayAliasForRoom(room) || _t('Unnamed room');
 
         const guestRead = room.worldReadable ? (
-                <div className="mx_RoomDirectory_perm">{ _t('World readable') }</div>
-            ) : <div />;
+            <div className="mx_RoomDirectory_perm">{ _t('World readable') }</div>
+        ) : <div />;
         const guestJoin = room.guestCanJoin ? (
-                <div className="mx_RoomDirectory_perm">{ _t('Guests can join') }</div>
-            ) : <div />;
+            <div className="mx_RoomDirectory_perm">{ _t('Guests can join') }</div>
+        ) : <div />;
 
         const perms = (guestRead || guestJoin) ? (<div className="mx_RoomDirectory_perms">
             { guestRead }&nbsp;

src/components/views/rooms/RoomHeader.js

@@ -27,7 +27,6 @@ import SettingsStore from "../../../settings/SettingsStore";
 import RoomHeaderButtons from '../right_panel/RoomHeaderButtons';
 import E2EIcon from './E2EIcon';
 import DecoratedRoomAvatar from "../avatars/DecoratedRoomAvatar";
-import {DefaultTagID} from "../../../stores/room-list/models";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import RoomTopic from "../elements/RoomTopic";
 import RoomName from "../elements/RoomName";
@@ -177,7 +176,6 @@ export default class RoomHeader extends React.Component {
             roomAvatar = <DecoratedRoomAvatar
                 room={this.props.room}
                 avatarSize={32}
-                tag={DefaultTagID.Untagged} // to apply room publicity badging
                 oobData={this.props.oobData}
                 viewAvatarOnClick={true}
             />;

src/components/views/rooms/RoomList.tsx

@@ -539,6 +539,7 @@ export default class RoomList extends React.PureComponent<IProps, IState> {
                     onResize={this.props.onResize}
                     showSkeleton={showSkeleton}
                     extraTiles={extraTiles}
+                    resizeNotifier={this.props.resizeNotifier}
                     alwaysVisible={ALWAYS_VISIBLE_TAGS.includes(orderedTagId)}
                 />
             });

src/components/views/rooms/RoomListNumResults.tsx

@@ -19,6 +19,7 @@ import React, {useState} from "react";
 import { _t } from "../../../languageHandler";
 import RoomListStore, { LISTS_UPDATE_EVENT } from "../../../stores/room-list/RoomListStore";
 import {useEventEmitter} from "../../../hooks/useEventEmitter";
+import SpaceStore from "../../../stores/SpaceStore";
 
 const RoomListNumResults: React.FC = () => {
     const [count, setCount] = useState<number>(null);
@@ -34,7 +35,10 @@ const RoomListNumResults: React.FC = () => {
     if (typeof count !== "number") return null;
 
     return <div className="mx_LeftPanel_roomListFilterCount">
-        {_t("%(count)s results", { count })}
+        { SpaceStore.instance.spacePanelSpaces.length
+            ? _t("%(count)s results in all spaces", { count })
+            : _t("%(count)s results", { count })
+        }
     </div>;
 };
 

src/components/views/rooms/RoomSublist.tsx

@@ -44,6 +44,7 @@ import { ActionPayload } from "../../../dispatcher/payloads";
 import { Enable, Resizable } from "re-resizable";
 import { Direction } from "re-resizable/lib/resizer";
 import { polyfillTouchEvent } from "../../../@types/polyfill";
+import { ResizeNotifier } from "../../../utils/ResizeNotifier";
 import { RoomNotificationStateStore } from "../../../stores/notifications/RoomNotificationStateStore";
 import RoomListLayoutStore from "../../../stores/room-list/RoomListLayoutStore";
 import { arrayFastClone, arrayHasOrderChange } from "../../../utils/arrays";
@@ -75,7 +76,7 @@ interface IProps {
     onResize: () => void;
     showSkeleton?: boolean;
     alwaysVisible?: boolean;
-
+    resizeNotifier: ResizeNotifier;
     extraTiles?: ReactComponentElement<typeof ExtraTile>[];
 
     // TODO: Account for https://github.com/vector-im/element-web/issues/14179
@@ -528,6 +529,7 @@ export default class RoomSublist extends React.Component<IProps, IState> {
                 tiles.push(<RoomTile
                     room={room}
                     key={`room-${room.roomId}`}
+                    resizeNotifier={this.props.resizeNotifier}
                     showMessagePreview={this.layout.showPreviews}
                     isMinimized={this.props.isMinimized}
                     tag={this.props.tagId}
@@ -763,7 +765,9 @@ export default class RoomSublist extends React.Component<IProps, IState> {
             'mx_RoomSublist': true,
             'mx_RoomSublist_hasMenuOpen': !!this.state.contextMenuPosition,
             'mx_RoomSublist_minimized': this.props.isMinimized,
-            'mx_RoomSublist_hidden': !this.state.rooms.length && this.props.alwaysVisible !== true,
+            'mx_RoomSublist_hidden': (
+                !this.state.rooms.length && !this.props.extraTiles?.length && this.props.alwaysVisible !== true
+            ),
         });
 
         let content = null;

src/components/views/rooms/RoomTile.tsx

@@ -53,12 +53,14 @@ import { CommunityPrototypeStore, IRoomProfile } from "../../../stores/Community
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import { getUnsentMessages } from "../../structures/RoomStatusBar";
 import { StaticNotificationState } from "../../../stores/notifications/StaticNotificationState";
+import { ResizeNotifier } from "../../../utils/ResizeNotifier";
 
 interface IProps {
     room: Room;
     showMessagePreview: boolean;
     isMinimized: boolean;
     tag: TagID;
+    resizeNotifier: ResizeNotifier;
 }
 
 type PartialDOMRect = Pick<DOMRect, "left" | "bottom">;
@@ -102,6 +104,9 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         };
         this.notificationState = RoomNotificationStateStore.instance.getRoomState(this.props.room);
         this.roomProps = EchoChamber.forRoom(this.props.room);
+        if (this.props.resizeNotifier) {
+            this.props.resizeNotifier.on("middlePanelResized", this.onResize);
+        }
     }
 
     private countUnsentEvents(): number {
@@ -116,6 +121,12 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         this.forceUpdate(); // notification state changed - update
     };
 
+    private onResize = () => {
+        if (this.showMessagePreview && !this.state.messagePreview) {
+            this.setState({messagePreview: this.generatePreview()});
+        }
+    };
+
     private onLocalEchoUpdated = (ev: MatrixEvent, room: Room) => {
         if (!room?.roomId === this.props.room.roomId) return;
         this.setState({hasUnsentEvents: this.countUnsentEvents() > 0});
@@ -195,6 +206,9 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
             );
             this.props.room.off("Room.name", this.onRoomNameUpdate);
         }
+        if (this.props.resizeNotifier) {
+            this.props.resizeNotifier.off("middlePanelResized", this.onResize);
+        }
         ActiveRoomObserver.removeListener(this.props.room.roomId, this.onActiveRoomUpdate);
         defaultDispatcher.unregister(this.dispatcherRef);
         this.notificationState.off(NOTIFICATION_STATE_UPDATE, this.onNotificationUpdate);
@@ -562,7 +576,6 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         const roomAvatar = <DecoratedRoomAvatar
             room={this.props.room}
             avatarSize={32}
-            tag={this.props.tag}
             displayBadge={this.props.isMinimized}
             oobData={({avatarUrl: roomProfile.avatarMxc})}
         />;

src/components/views/rooms/SendMessageComposer.js

@@ -506,9 +506,8 @@ export default class SendMessageComposer extends React.Component {
             member.rawDisplayName : userId;
         const caret = this._editorRef.getCaret();
         const position = model.positionForOffset(caret.offset, caret.atNodeEnd);
-        // index is -1 if there are no parts but we only care for if this would be the part in position 0
-        const insertIndex = position.index > 0 ? position.index : 0;
-        const parts = partCreator.createMentionParts(insertIndex, displayName, userId);
+        // Insert suffix only if the caret is at the start of the composer
+        const parts = partCreator.createMentionParts(caret.offset === 0, displayName, userId);
         model.transform(() => {
             const addedLen = model.insert(parts, position);
             return model.positionForOffset(caret.offset + addedLen, true);

src/components/views/rooms/Stickerpicker.js

@@ -266,25 +266,25 @@ export default class Stickerpicker extends React.Component {
                             width: this.popoverWidth,
                         }}
                     >
-                    <PersistedElement persistKey={PERSISTED_ELEMENT_KEY} zIndex={STICKERPICKER_Z_INDEX}>
-                        <AppTile
-                            app={stickerApp}
-                            room={this.props.room}
-                            fullWidth={true}
-                            userId={MatrixClientPeg.get().credentials.userId}
-                            creatorUserId={stickerpickerWidget.sender || MatrixClientPeg.get().credentials.userId}
-                            waitForIframeLoad={true}
-                            showMenubar={true}
-                            onEditClick={this._launchManageIntegrations}
-                            onDeleteClick={this._removeStickerpickerWidgets}
-                            showTitle={false}
-                            showCancel={false}
-                            showPopout={false}
-                            onMinimiseClick={this._onHideStickersClick}
-                            handleMinimisePointerEvents={true}
-                            userWidget={true}
-                        />
-                    </PersistedElement>
+                        <PersistedElement persistKey={PERSISTED_ELEMENT_KEY} zIndex={STICKERPICKER_Z_INDEX}>
+                            <AppTile
+                                app={stickerApp}
+                                room={this.props.room}
+                                fullWidth={true}
+                                userId={MatrixClientPeg.get().credentials.userId}
+                                creatorUserId={stickerpickerWidget.sender || MatrixClientPeg.get().credentials.userId}
+                                waitForIframeLoad={true}
+                                showMenubar={true}
+                                onEditClick={this._launchManageIntegrations}
+                                onDeleteClick={this._removeStickerpickerWidgets}
+                                showTitle={false}
+                                showCancel={false}
+                                showPopout={false}
+                                onMinimiseClick={this._onHideStickersClick}
+                                handleMinimisePointerEvents={true}
+                                userWidget={true}
+                            />
+                        </PersistedElement>
                     </div>
                 </div>
             );

src/components/views/rooms/ThirdPartyMemberInfo.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd.
+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.
@@ -15,9 +15,9 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import {MatrixEvent} from "matrix-js-sdk/src/models/event";
+import {Room} from "matrix-js-sdk/src/models/room";
 import {_t} from "../../../languageHandler";
 import dis from "../../../dispatcher/dispatcher";
 import * as sdk from "../../../index";
@@ -26,12 +26,24 @@ import {isValid3pidInvite} from "../../../RoomInvite";
 import RoomAvatar from "../avatars/RoomAvatar";
 import RoomName from "../elements/RoomName";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import SettingsStore from "../../../settings/SettingsStore";
+
+interface IProps {
+    event: MatrixEvent;
+}
+
+interface IState {
+    stateKey: string;
+    roomId: string;
+    displayName: string;
+    invited: boolean;
+    canKick: boolean;
+    senderName: string;
+}
 
 @replaceableComponent("views.rooms.ThirdPartyMemberInfo")
-export default class ThirdPartyMemberInfo extends React.Component {
-    static propTypes = {
-        event: PropTypes.instanceOf(MatrixEvent).isRequired,
-    };
+export default class ThirdPartyMemberInfo extends React.Component<IProps, IState> {
+    private room: Room;
 
     constructor(props) {
         super(props);
@@ -124,7 +136,7 @@ export default class ThirdPartyMemberInfo extends React.Component {
         }
 
         let scopeHeader;
-        if (this.room.isSpaceRoom()) {
+        if (SettingsStore.getValue("feature_spaces") && this.room.isSpaceRoom()) {
             scopeHeader = <div className="mx_RightPanel_scopeHeader">
                 <RoomAvatar room={this.room} height={32} width={32} />
                 <RoomName room={this.room} />

src/components/views/rooms/VoiceRecordComposerTile.tsx

@@ -16,8 +16,8 @@ limitations under the License.
 
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import {_t} from "../../../languageHandler";
-import React from "react";
-import {VoiceRecording} from "../../../voice/VoiceRecording";
+import React, {ReactNode} from "react";
+import {RecordingState, VoiceRecording} from "../../../voice/VoiceRecording";
 import {Room} from "matrix-js-sdk/src/models/room";
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import classNames from "classnames";
@@ -25,6 +25,12 @@ import LiveRecordingWaveform from "../voice_messages/LiveRecordingWaveform";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import LiveRecordingClock from "../voice_messages/LiveRecordingClock";
 import {VoiceRecordingStore} from "../../../stores/VoiceRecordingStore";
+import {UPDATE_EVENT} from "../../../stores/AsyncStore";
+import RecordingPlayback from "../voice_messages/RecordingPlayback";
+import {MsgType} from "matrix-js-sdk/src/@types/event";
+import Modal from "../../../Modal";
+import ErrorDialog from "../dialogs/ErrorDialog";
+import CallMediaHandler from "../../../CallMediaHandler";
 
 interface IProps {
     room: Room;
@@ -32,6 +38,7 @@ interface IProps {
 
 interface IState {
     recorder?: VoiceRecording;
+    recordingPhase?: RecordingState;
 }
 
 /**
@@ -43,87 +50,181 @@ export default class VoiceRecordComposerTile extends React.PureComponent<IProps,
         super(props);
 
         this.state = {
-            recorder: null, // not recording by default
+            recorder: null, // no recording started by default
         };
     }
 
-    private onStartStopVoiceMessage = async () => {
-        // TODO: @@ TravisR: We do not want to auto-send on stop.
-        if (this.state.recorder) {
-            await this.state.recorder.stop();
-            const mxc = await this.state.recorder.upload();
-            MatrixClientPeg.get().sendMessage(this.props.room.roomId, {
-                "body": "Voice message",
-                "msgtype": "org.matrix.msc2516.voice",
-                //"msgtype": MsgType.Audio,
-                "url": mxc,
-                "info": {
-                    duration: Math.round(this.state.recorder.durationSeconds * 1000),
-                    mimetype: this.state.recorder.contentType,
-                    size: this.state.recorder.contentLength,
-                },
+    public async componentWillUnmount() {
+        await VoiceRecordingStore.instance.disposeRecording();
+    }
 
-                // MSC1767 experiment
-                "org.matrix.msc1767.text": "Voice message",
-                "org.matrix.msc1767.file": {
-                    url: mxc,
-                    name: "Voice message.ogg",
-                    mimetype: this.state.recorder.contentType,
-                    size: this.state.recorder.contentLength,
-                },
-                "org.matrix.msc1767.audio": {
-                    duration: Math.round(this.state.recorder.durationSeconds * 1000),
-                    // TODO: @@ TravisR: Waveform? (MSC1767 decision)
-                },
-                "org.matrix.experimental.msc2516.voice": { // MSC2516+MSC1767 experiment
-                    duration: Math.round(this.state.recorder.durationSeconds * 1000),
-
-                    // Events can't have floats, so we try to maintain resolution by using 1024
-                    // as a maximum value. The waveform contains values between zero and 1, so this
-                    // should come out largely sane.
-                    //
-                    // We're expecting about one data point per second of audio.
-                    waveform: this.state.recorder.finalWaveform.map(v => Math.round(v * 1024)),
-                },
-            });
-            await VoiceRecordingStore.instance.disposeRecording();
-            this.setState({recorder: null});
-            return;
+    // called by composer
+    public async send() {
+        if (!this.state.recorder) {
+            throw new Error("No recording started - cannot send anything");
         }
-        const recorder = VoiceRecordingStore.instance.startRecording();
-        await recorder.start();
-        this.setState({recorder});
+
+        await this.state.recorder.stop();
+        const mxc = await this.state.recorder.upload();
+        MatrixClientPeg.get().sendMessage(this.props.room.roomId, {
+            "body": "Voice message",
+            //"msgtype": "org.matrix.msc2516.voice",
+            "msgtype": MsgType.Audio,
+            "url": mxc,
+            "info": {
+                duration: Math.round(this.state.recorder.durationSeconds * 1000),
+                mimetype: this.state.recorder.contentType,
+                size: this.state.recorder.contentLength,
+            },
+
+            // MSC1767 experiment
+            "org.matrix.msc1767.text": "Voice message",
+            "org.matrix.msc1767.file": {
+                url: mxc,
+                name: "Voice message.ogg",
+                mimetype: this.state.recorder.contentType,
+                size: this.state.recorder.contentLength,
+            },
+            "org.matrix.msc1767.audio": {
+                duration: Math.round(this.state.recorder.durationSeconds * 1000),
+
+                // Events can't have floats, so we try to maintain resolution by using 1024
+                // as a maximum value. The waveform contains values between zero and 1, so this
+                // should come out largely sane.
+                //
+                // We're expecting about one data point per second of audio.
+                waveform: this.state.recorder.getPlayback().waveform.map(v => Math.round(v * 1024)),
+            },
+            "org.matrix.msc2516.voice": {}, // No content, this is a rendering hint
+        });
+        await this.disposeRecording();
+    }
+
+    private async disposeRecording() {
+        await VoiceRecordingStore.instance.disposeRecording();
+
+        // Reset back to no recording, which means no phase (ie: restart component entirely)
+        this.setState({recorder: null, recordingPhase: null});
+    }
+
+    private onCancel = async () => {
+        await this.disposeRecording();
     };
 
-    private renderWaveformArea() {
-        if (!this.state.recorder) return null;
+    private onRecordStartEndClick = async () => {
+        if (this.state.recorder) {
+            await this.state.recorder.stop();
+            return;
+        }
 
-        return <div className='mx_VoiceRecordComposerTile_waveformContainer'>
+        // The "microphone access error" dialogs are used a lot, so let's functionify them
+        const accessError = () => {
+            Modal.createTrackedDialog('Microphone Access Error', '', ErrorDialog, {
+                title: _t("Unable to access your microphone"),
+                description: <>
+                    <p>{_t(
+                        "We were unable to access your microphone. Please check your browser settings and try again.",
+                    )}</p>
+                </>,
+            });
+        };
+
+        // Do a sanity test to ensure we're about to grab a valid microphone reference. Things might
+        // change between this and recording, but at least we will have tried.
+        try {
+            const devices = await CallMediaHandler.getDevices();
+            if (!devices?.['audioinput']?.length) {
+                Modal.createTrackedDialog('No Microphone Error', '', ErrorDialog, {
+                    title: _t("No microphone found"),
+                    description: <>
+                        <p>{_t(
+                            "We didn't find a microphone on your device. Please check your settings and try again.",
+                        )}</p>
+                    </>,
+                });
+                return;
+            }
+            // else we probably have a device that is good enough
+        } catch (e) {
+            console.error("Error getting devices: ", e);
+            accessError();
+            return;
+        }
+
+        try {
+            const recorder = VoiceRecordingStore.instance.startRecording();
+            await recorder.start();
+
+            // We don't need to remove the listener: the recorder will clean that up for us.
+            recorder.on(UPDATE_EVENT, (ev: RecordingState) => {
+                if (ev === RecordingState.EndingSoon) return; // ignore this state: it has no UI purpose here
+                this.setState({recordingPhase: ev});
+            });
+
+            this.setState({recorder, recordingPhase: RecordingState.Started});
+        } catch (e) {
+            console.error("Error starting recording: ", e);
+            accessError();
+
+            // noinspection ES6MissingAwait - if this goes wrong we don't want it to affect the call stack
+            VoiceRecordingStore.instance.disposeRecording();
+        }
+    };
+
+    private renderWaveformArea(): ReactNode {
+        if (!this.state.recorder) return null; // no recorder means we're not recording: no waveform
+
+        if (this.state.recordingPhase !== RecordingState.Started) {
+            // TODO: @@ TR: Should we disable this during upload? What does a failed upload look like?
+            return <RecordingPlayback playback={this.state.recorder.getPlayback()} />;
+        }
+
+        // only other UI is the recording-in-progress UI
+        return <div className="mx_VoiceMessagePrimaryContainer mx_VoiceRecordComposerTile_recording">
             <LiveRecordingClock recorder={this.state.recorder} />
             <LiveRecordingWaveform recorder={this.state.recorder} />
         </div>;
     }
 
-    public render() {
-        const classes = classNames({
-            'mx_MessageComposer_button': !this.state.recorder,
-            'mx_MessageComposer_voiceMessage': !this.state.recorder,
-            'mx_VoiceRecordComposerTile_stop': !!this.state.recorder,
-        });
+    public render(): ReactNode {
+        let recordingInfo;
+        let deleteButton;
+        if (!this.state.recordingPhase || this.state.recordingPhase === RecordingState.Started) {
+            const classes = classNames({
+                'mx_MessageComposer_button': !this.state.recorder,
+                'mx_MessageComposer_voiceMessage': !this.state.recorder,
+                'mx_VoiceRecordComposerTile_stop': this.state.recorder?.isRecording,
+            });
 
-        let tooltip = _t("Record a voice message");
-        if (!!this.state.recorder) {
-            // TODO: @@ TravisR: Change to match behaviour
-            tooltip = _t("Stop & send recording");
+            let tooltip = _t("Record a voice message");
+            if (!!this.state.recorder) {
+                tooltip = _t("Stop the recording");
+            }
+
+            let stopOrRecordBtn = <AccessibleTooltipButton
+                className={classes}
+                onClick={this.onRecordStartEndClick}
+                title={tooltip}
+            />;
+            if (this.state.recorder && !this.state.recorder?.isRecording) {
+                stopOrRecordBtn = null;
+            }
+
+            recordingInfo = stopOrRecordBtn;
+        }
+
+        if (this.state.recorder && this.state.recordingPhase !== RecordingState.Uploading) {
+            deleteButton = <AccessibleTooltipButton
+                className='mx_VoiceRecordComposerTile_delete'
+                title={_t("Delete recording")}
+                onClick={this.onCancel}
+            />;
         }
 
         return (<>
+            {deleteButton}
             {this.renderWaveformArea()}
-            <AccessibleTooltipButton
-                className={classes}
-                onClick={this.onStartStopVoiceMessage}
-                title={tooltip}
-            />
+            {recordingInfo}
         </>);
     }
 }

src/components/views/settings/ChangeAvatar.js

@@ -154,7 +154,7 @@ export default class ChangeAvatar extends React.Component {
             const BaseAvatar = sdk.getComponent("avatars.BaseAvatar");
             // XXX: FIXME: once we track in the JS what our own displayname is(!) then use it here rather than ?
             avatarImg = <BaseAvatar width={this.props.width} height={this.props.height} resizeMethod='crop'
-                        name='?' idName={MatrixClientPeg.get().getUserIdLocalpart()} url={this.state.avatarUrl} />;
+                name='?' idName={MatrixClientPeg.get().getUserIdLocalpart()} url={this.state.avatarUrl} />;
         }
 
         let uploadSection;

src/components/views/settings/ChangePassword.js

@@ -206,7 +206,7 @@ export default class ChangePassword extends React.Component {
                 test: ({ value, allowEmpty }) => allowEmpty || !!value,
                 invalid: () => _t("Passwords can't be empty"),
             },
-         ],
+        ],
     });
 
     onChangeNewPassword = (ev) => {
@@ -245,7 +245,7 @@ export default class ChangePassword extends React.Component {
                 },
                 invalid: () => _t("Passwords don't match"),
             },
-         ],
+        ],
     });
 
     onClickChange = async (ev) => {

src/components/views/settings/CrossSigningPanel.js

@@ -259,7 +259,7 @@ export default class CrossSigningPanel extends React.PureComponent {
                             <td>{_t("Homeserver feature support:")}</td>
                             <td>{homeserverSupportsCrossSigning ? _t("exists") : _t("not found")}</td>
                         </tr>
-                   </tbody></table>
+                    </tbody></table>
                 </details>
                 {errorSection}
                 {actionRow}

src/components/views/settings/DevicesPanel.js

@@ -214,7 +214,7 @@ export default class DevicesPanel extends React.Component {
         const deleteButton = this.state.deleting ?
             <Spinner w={22} h={22} /> :
             <AccessibleButton onClick={this._onDeleteClick} kind="danger_sm">
-               { _t("Delete %(count)s sessions", {count: this.state.selectedDevices.length}) }
+                { _t("Delete %(count)s sessions", {count: this.state.selectedDevices.length})}
             </AccessibleButton>;
 
         const classes = classNames(this.props.className, "mx_DevicesPanel");

src/components/views/settings/EventIndexPanel.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.
@@ -28,10 +28,17 @@ import {SettingLevel} from "../../../settings/SettingLevel";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import SeshatResetDialog from '../dialogs/SeshatResetDialog';
 
+interface IState {
+    enabling: boolean;
+    eventIndexSize: number;
+    roomCount: number;
+    eventIndexingEnabled: boolean;
+}
+
 @replaceableComponent("views.settings.EventIndexPanel")
-export default class EventIndexPanel extends React.Component {
-    constructor() {
-        super();
+export default class EventIndexPanel extends React.Component<{}, IState> {
+    constructor(props) {
+        super(props);
 
         this.state = {
             enabling: false,
@@ -68,7 +75,7 @@ export default class EventIndexPanel extends React.Component {
         }
     }
 
-    async componentDidMount(): void {
+    componentDidMount(): void {
         this.updateState();
     }
 
@@ -102,8 +109,10 @@ export default class EventIndexPanel extends React.Component {
         });
     }
 
-    _onManage = async () => {
+    private onManage = async () => {
         Modal.createTrackedDialogAsync('Message search', 'Message search',
+            // @ts-ignore: TS doesn't seem to like the type of this now that it
+            // has also been converted to TS as well, but I can't figure out why...
             import('../../../async-components/views/dialogs/eventindex/ManageEventIndexDialog'),
             {
                 onFinished: () => {},
@@ -111,7 +120,7 @@ export default class EventIndexPanel extends React.Component {
         );
     }
 
-    _onEnable = async () => {
+    private onEnable = async () => {
         this.setState({
             enabling: true,
         });
@@ -123,14 +132,13 @@ export default class EventIndexPanel extends React.Component {
         await this.updateState();
     }
 
-    _confirmEventStoreReset = () => {
-        const self = this;
+    private confirmEventStoreReset = () => {
         const { close } = Modal.createDialog(SeshatResetDialog, {
             onFinished: async (success) => {
                 if (success) {
                     await SettingsStore.setValue('enableEventIndexing', null, SettingLevel.DEVICE, false);
                     await EventIndexPeg.deleteEventIndex();
-                    await self._onEnable();
+                    await this.onEnable();
                     close();
                 }
             },
@@ -145,20 +153,19 @@ export default class EventIndexPanel extends React.Component {
         if (EventIndexPeg.get() !== null) {
             eventIndexingSettings = (
                 <div>
-                    <div className='mx_SettingsTab_subsectionText'>
-                        {_t("Securely cache encrypted messages locally for them " +
-                            "to appear in search results, using %(size)s to store messages from %(rooms)s rooms.",
-                            {
-                                size: formatBytes(this.state.eventIndexSize, 0),
-                                // This drives the singular / plural string
-                                // selection for "room" / "rooms" only.
-                                count: this.state.roomCount,
-                                rooms: formatCountLong(this.state.roomCount),
-                            },
-                        )}
-                    </div>
+                    <div className='mx_SettingsTab_subsectionText'>{_t(
+                        "Securely cache encrypted messages locally for them " +
+                        "to appear in search results, using %(size)s to store messages from %(rooms)s rooms.",
+                        {
+                            size: formatBytes(this.state.eventIndexSize, 0),
+                            // This drives the singular / plural string
+                            // selection for "room" / "rooms" only.
+                            count: this.state.roomCount,
+                            rooms: formatCountLong(this.state.roomCount),
+                        },
+                    )}</div>
                     <div>
-                        <AccessibleButton kind="primary" onClick={this._onManage}>
+                        <AccessibleButton kind="primary" onClick={this.onManage}>
                             {_t("Manage")}
                         </AccessibleButton>
                     </div>
@@ -167,13 +174,13 @@ export default class EventIndexPanel extends React.Component {
         } else if (!this.state.eventIndexingEnabled && EventIndexPeg.supportIsInstalled()) {
             eventIndexingSettings = (
                 <div>
-                    <div className='mx_SettingsTab_subsectionText'>
-                        {_t( "Securely cache encrypted messages locally for them to " +
-                             "appear in search results.")}
-                    </div>
+                    <div className='mx_SettingsTab_subsectionText'>{_t(
+                        "Securely cache encrypted messages locally for them to " +
+                        "appear in search results.",
+                    )}</div>
                     <div>
                         <AccessibleButton kind="primary" disabled={this.state.enabling}
-                            onClick={this._onEnable}>
+                            onClick={this.onEnable}>
                             {_t("Enable")}
                         </AccessibleButton>
                         {this.state.enabling ? <InlineSpinner /> : <div />}
@@ -188,40 +195,36 @@ export default class EventIndexPanel extends React.Component {
             );
 
             eventIndexingSettings = (
-                <div className='mx_SettingsTab_subsectionText'>
+                <div className='mx_SettingsTab_subsectionText'>{_t(
+                    "%(brand)s is missing some components required for securely " +
+                    "caching encrypted messages locally. If you'd like to " +
+                    "experiment with this feature, build a custom %(brand)s Desktop " +
+                    "with <nativeLink>search components added</nativeLink>.",
                     {
-                        _t( "%(brand)s is missing some components required for securely " +
-                            "caching encrypted messages locally. If you'd like to " +
-                            "experiment with this feature, build a custom %(brand)s Desktop " +
-                            "with <nativeLink>search components added</nativeLink>.",
-                            {
-                                brand,
-                            },
-                            {
-                                'nativeLink': (sub) => <a href={nativeLink} target="_blank"
-                                    rel="noreferrer noopener">{sub}</a>,
-                            },
-                        )
-                    }
-                </div>
+                        brand,
+                    },
+                    {
+                        nativeLink: sub => <a href={nativeLink}
+                            target="_blank" rel="noreferrer noopener"
+                        >{sub}</a>,
+                    },
+                )}</div>
             );
         } else if (!EventIndexPeg.platformHasSupport()) {
             eventIndexingSettings = (
-                <div className='mx_SettingsTab_subsectionText'>
+                <div className='mx_SettingsTab_subsectionText'>{_t(
+                    "%(brand)s can't securely cache encrypted messages locally " +
+                    "while running in a web browser. Use <desktopLink>%(brand)s Desktop</desktopLink> " +
+                    "for encrypted messages to appear in search results.",
                     {
-                        _t( "%(brand)s can't securely cache encrypted messages locally " +
-                            "while running in a web browser. Use <desktopLink>%(brand)s Desktop</desktopLink> " +
-                            "for encrypted messages to appear in search results.",
-                            {
-                                brand,
-                            },
-                            {
-                                'desktopLink': (sub) => <a href="https://element.io/get-started"
-                                    target="_blank" rel="noreferrer noopener">{sub}</a>,
-                            },
-                        )
-                    }
-                </div>
+                        brand,
+                    },
+                    {
+                        desktopLink: sub => <a href="https://element.io/get-started"
+                            target="_blank" rel="noreferrer noopener"
+                        >{sub}</a>,
+                    },
+                )}</div>
             );
         } else {
             eventIndexingSettings = (
@@ -229,23 +232,22 @@ export default class EventIndexPanel extends React.Component {
                     <p>
                         {this.state.enabling
                             ? <InlineSpinner />
-                            : _t("Message search initilisation failed")
+                            : _t("Message search initialisation failed")
                         }
                     </p>
                     {EventIndexPeg.error && (
-                    <details>
-                        <summary>{_t("Advanced")}</summary>
-                        <code>
-                            {EventIndexPeg.error.message}
-                        </code>
-                        <p>
-                            <AccessibleButton key="delete" kind="danger" onClick={this._confirmEventStoreReset}>
-                                {_t("Reset")}
-                            </AccessibleButton>
-                        </p>
-                    </details>
+                        <details>
+                            <summary>{_t("Advanced")}</summary>
+                            <code>
+                                {EventIndexPeg.error.message}
+                            </code>
+                            <p>
+                                <AccessibleButton key="delete" kind="danger" onClick={this.confirmEventStoreReset}>
+                                    {_t("Reset")}
+                                </AccessibleButton>
+                            </p>
+                        </details>
                     )}
-
                 </div>
             );
         }

src/components/views/settings/Notifications.js

@@ -100,7 +100,7 @@ export default class Notifications extends React.Component {
         MatrixClientPeg.get().setPushRuleEnabled(
             'global', self.state.masterPushRule.kind, self.state.masterPushRule.rule_id, !checked,
         ).then(function() {
-           self._refreshFromServer();
+            self._refreshFromServer();
         });
     };
 
@@ -580,12 +580,12 @@ export default class Notifications extends React.Component {
                         "vectorRuleId": "_keywords",
                         "description": (
                             <span>
-                            { _t('Messages containing <span>keywords</span>',
-                                {},
-                                { 'span': (sub) =>
-                                    <span className="mx_UserNotifSettings_keywords" onClick={ self.onKeywordsClicked }>{sub}</span>,
-                                },
-                            )}
+                                { _t('Messages containing <span>keywords</span>',
+                                    {},
+                                    { 'span': (sub) =>
+                                        <span className="mx_UserNotifSettings_keywords" onClick={ self.onKeywordsClicked }>{sub}</span>,
+                                    },
+                                )}
                             </span>
                         ),
                         "vectorState": self.state.vectorContentRules.vectorState,
@@ -743,8 +743,8 @@ export default class Notifications extends React.Component {
 
     emailNotificationsRow(address, label) {
         return <LabelledToggleSwitch value={this.hasEmailPusher(this.state.pushers, address)}
-                                     onChange={this.onEnableEmailNotificationsChange.bind(this, address)}
-                                     label={label} key={`emailNotif_${label}`} />;
+            onChange={this.onEnableEmailNotificationsChange.bind(this, address)}
+            label={label} key={`emailNotif_${label}`} />;
     }
 
     render() {
@@ -757,8 +757,8 @@ export default class Notifications extends React.Component {
         let masterPushRuleDiv;
         if (this.state.masterPushRule) {
             masterPushRuleDiv = <LabelledToggleSwitch value={!this.state.masterPushRule.enabled}
-                                                      onChange={this.onEnableNotificationsChange}
-                                                      label={_t('Enable notifications for this account')} />;
+                onChange={this.onEnableNotificationsChange}
+                label={_t('Enable notifications for this account')} />;
         }
 
         let clearNotificationsButton;
@@ -874,16 +874,16 @@ export default class Notifications extends React.Component {
                     { spinner }
 
                     <LabelledToggleSwitch value={SettingsStore.getValue("notificationsEnabled")}
-                                          onChange={this.onEnableDesktopNotificationsChange}
-                                          label={_t('Enable desktop notifications for this session')} />
+                        onChange={this.onEnableDesktopNotificationsChange}
+                        label={_t('Enable desktop notifications for this session')} />
 
                     <LabelledToggleSwitch value={SettingsStore.getValue("notificationBodyEnabled")}
-                                          onChange={this.onEnableDesktopNotificationBodyChange}
-                                          label={_t('Show message in desktop notification')} />
+                        onChange={this.onEnableDesktopNotificationBodyChange}
+                        label={_t('Show message in desktop notification')} />
 
                     <LabelledToggleSwitch value={SettingsStore.getValue("audioNotificationsEnabled")}
-                                          onChange={this.onEnableAudioNotificationsChange}
-                                          label={_t('Enable audible notifications for this session')} />
+                        onChange={this.onEnableAudioNotificationsChange}
+                        label={_t('Enable audible notifications for this session')} />
 
                     { emailNotificationsRows }
 

src/components/views/settings/ProfileSettings.js

@@ -170,8 +170,12 @@ export default class ProfileSettings extends React.Component {
                 noValidate={true}
                 className="mx_ProfileSettings_profileForm"
             >
-                <input type="file" ref={this._avatarUpload} className="mx_ProfileSettings_avatarUpload"
-                       onChange={this._onAvatarChanged} accept="image/*" />
+                <input
+                    type="file"
+                    ref={this._avatarUpload} className="mx_ProfileSettings_avatarUpload"
+                    onChange={this._onAvatarChanged}
+                    accept="image/*"
+                />
                 <div className="mx_ProfileSettings_profile">
                     <div className="mx_ProfileSettings_controls">
                         <span className="mx_SettingsTab_subheading">{_t("Profile")}</span>

src/components/views/settings/SetIdServer.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 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.
@@ -16,7 +16,6 @@ limitations under the License.
 
 import url from 'url';
 import React from 'react';
-import PropTypes from 'prop-types';
 import {_t} from "../../../languageHandler";
 import * as sdk from '../../../index';
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
@@ -28,6 +27,7 @@ import {abbreviateUrl, unabbreviateUrl} from "../../../utils/UrlUtils";
 import { getDefaultIdentityServerUrl, doesIdentityServerHaveTerms } from '../../../utils/IdentityServerUtils';
 import {timeout} from "../../../utils/promise";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { ActionPayload } from '../../../dispatcher/payloads';
 
 // We'll wait up to this long when checking for 3PID bindings on the IS.
 const REACHABILITY_TIMEOUT = 10000; // ms
@@ -59,16 +59,28 @@ async function checkIdentityServerUrl(u) {
     }
 }
 
-@replaceableComponent("views.settings.SetIdServer")
-export default class SetIdServer extends React.Component {
-    static propTypes = {
-        // Whether or not the ID server is missing terms. This affects the text
-        // shown to the user.
-        missingTerms: PropTypes.bool,
-    };
+interface IProps {
+    // Whether or not the ID server is missing terms. This affects the text
+    // shown to the user.
+    missingTerms: boolean;
+}
 
-    constructor() {
-        super();
+interface IState {
+    defaultIdServer?: string;
+    currentClientIdServer: string;
+    idServer?: string;
+    error?: string;
+    busy: boolean;
+    disconnectBusy: boolean;
+    checking: boolean;
+}
+
+@replaceableComponent("views.settings.SetIdServer")
+export default class SetIdServer extends React.Component<IProps, IState> {
+    private dispatcherRef: string;
+
+    constructor(props) {
+        super(props);
 
         let defaultIdServer = '';
         if (!MatrixClientPeg.get().getIdentityServerUrl() && getDefaultIdentityServerUrl()) {
@@ -96,7 +108,7 @@ export default class SetIdServer extends React.Component {
         dis.unregister(this.dispatcherRef);
     }
 
-    onAction = (payload) => {
+    private onAction = (payload: ActionPayload) => {
         // We react to changes in the ID server in the event the user is staring at this form
         // when changing their identity server on another device.
         if (payload.action !== "id_server_changed") return;
@@ -106,13 +118,13 @@ export default class SetIdServer extends React.Component {
         });
     };
 
-    _onIdentityServerChanged = (ev) => {
+    private onIdentityServerChanged = (ev) => {
         const u = ev.target.value;
 
         this.setState({idServer: u});
     };
 
-    _getTooltip = () => {
+    private getTooltip = () => {
         if (this.state.checking) {
             const InlineSpinner = sdk.getComponent('views.elements.InlineSpinner');
             return <div>
@@ -126,11 +138,11 @@ export default class SetIdServer extends React.Component {
         }
     };
 
-    _idServerChangeEnabled = () => {
+    private idServerChangeEnabled = () => {
         return !!this.state.idServer && !this.state.busy;
     };
 
-    _saveIdServer = (fullUrl) => {
+    private saveIdServer = (fullUrl) => {
         // Account data change will update localstorage, client, etc through dispatcher
         MatrixClientPeg.get().setAccountData("m.identity_server", {
             base_url: fullUrl,
@@ -143,7 +155,7 @@ export default class SetIdServer extends React.Component {
         });
     };
 
-    _checkIdServer = async (e) => {
+    private checkIdServer = async (e) => {
         e.preventDefault();
         const { idServer, currentClientIdServer } = this.state;
 
@@ -166,14 +178,14 @@ export default class SetIdServer extends React.Component {
                 // Double check that the identity server even has terms of service.
                 const hasTerms = await doesIdentityServerHaveTerms(fullUrl);
                 if (!hasTerms) {
-                    const [confirmed] = await this._showNoTermsWarning(fullUrl);
+                    const [confirmed] = await this.showNoTermsWarning(fullUrl);
                     save = confirmed;
                 }
 
                 // Show a general warning, possibly with details about any bound
                 // 3PIDs that would be left behind.
                 if (save && currentClientIdServer && fullUrl !== currentClientIdServer) {
-                    const [confirmed] = await this._showServerChangeWarning({
+                    const [confirmed] = await this.showServerChangeWarning({
                         title: _t("Change identity server"),
                         unboundMessage: _t(
                             "Disconnect from the identity server <current /> and " +
@@ -189,7 +201,7 @@ export default class SetIdServer extends React.Component {
                 }
 
                 if (save) {
-                    this._saveIdServer(fullUrl);
+                    this.saveIdServer(fullUrl);
                 }
             } catch (e) {
                 console.error(e);
@@ -204,7 +216,7 @@ export default class SetIdServer extends React.Component {
         });
     };
 
-    _showNoTermsWarning(fullUrl) {
+    private showNoTermsWarning(fullUrl) {
         const QuestionDialog = sdk.getComponent("views.dialogs.QuestionDialog");
         const { finished } = Modal.createTrackedDialog('No Terms Warning', '', QuestionDialog, {
             title: _t("Identity server has no terms of service"),
@@ -223,10 +235,10 @@ export default class SetIdServer extends React.Component {
         return finished;
     }
 
-    _onDisconnectClicked = async () => {
+    private onDisconnectClicked = async () => {
         this.setState({disconnectBusy: true});
         try {
-            const [confirmed] = await this._showServerChangeWarning({
+            const [confirmed] = await this.showServerChangeWarning({
                 title: _t("Disconnect identity server"),
                 unboundMessage: _t(
                     "Disconnect from the identity server <idserver />?", {},
@@ -235,14 +247,14 @@ export default class SetIdServer extends React.Component {
                 button: _t("Disconnect"),
             });
             if (confirmed) {
-                this._disconnectIdServer();
+                this.disconnectIdServer();
             }
         } finally {
             this.setState({disconnectBusy: false});
         }
     };
 
-    async _showServerChangeWarning({ title, unboundMessage, button }) {
+    private async showServerChangeWarning({ title, unboundMessage, button }) {
         const { currentClientIdServer } = this.state;
 
         let threepids = [];
@@ -318,7 +330,7 @@ export default class SetIdServer extends React.Component {
         return finished;
     }
 
-    _disconnectIdServer = () => {
+    private disconnectIdServer = () => {
         // Account data change will update localstorage, client, etc through dispatcher
         MatrixClientPeg.get().setAccountData("m.identity_server", {
             base_url: null, // clear
@@ -371,7 +383,7 @@ export default class SetIdServer extends React.Component {
 
         let discoSection;
         if (idServerUrl) {
-            let discoButtonContent = _t("Disconnect");
+            let discoButtonContent: React.ReactNode = _t("Disconnect");
             let discoBodyText = _t(
                 "Disconnecting from your identity server will mean you " +
                 "won't be discoverable by other users and you won't be " +
@@ -391,14 +403,14 @@ export default class SetIdServer extends React.Component {
             }
             discoSection = <div>
                 <span className="mx_SettingsTab_subsectionText">{discoBodyText}</span>
-                <AccessibleButton onClick={this._onDisconnectClicked} kind="danger_sm">
+                <AccessibleButton onClick={this.onDisconnectClicked} kind="danger_sm">
                     {discoButtonContent}
                 </AccessibleButton>
             </div>;
         }
 
         return (
-            <form className="mx_SettingsTab_section mx_SetIdServer" onSubmit={this._checkIdServer}>
+            <form className="mx_SettingsTab_section mx_SetIdServer" onSubmit={this.checkIdServer}>
                 <span className="mx_SettingsTab_subheading">
                     {sectionTitle}
                 </span>
@@ -411,15 +423,15 @@ export default class SetIdServer extends React.Component {
                     autoComplete="off"
                     placeholder={this.state.defaultIdServer}
                     value={this.state.idServer}
-                    onChange={this._onIdentityServerChanged}
-                    tooltipContent={this._getTooltip()}
+                    onChange={this.onIdentityServerChanged}
+                    tooltipContent={this.getTooltip()}
                     tooltipClassName="mx_SetIdServer_tooltip"
                     disabled={this.state.busy}
                     forceValidity={this.state.error ? false : null}
                 />
                 <AccessibleButton type="submit" kind="primary_sm"
-                    onClick={this._checkIdServer}
-                    disabled={!this._idServerChangeEnabled()}
+                    onClick={this.checkIdServer}
+                    disabled={!this.idServerChangeEnabled()}
                 >{_t("Change")}</AccessibleButton>
                 {discoSection}
             </form>

src/components/views/settings/account/EmailAddresses.js

@@ -90,12 +90,18 @@ export class ExistingEmailAddress extends React.Component {
                     <span className="mx_ExistingEmailAddress_promptText">
                         {_t("Remove %(email)s?", {email: this.props.email.address} )}
                     </span>
-                    <AccessibleButton onClick={this._onActuallyRemove} kind="danger_sm"
-                                      className="mx_ExistingEmailAddress_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onActuallyRemove}
+                        kind="danger_sm"
+                        className="mx_ExistingEmailAddress_confirmBtn"
+                    >
                         {_t("Remove")}
                     </AccessibleButton>
-                    <AccessibleButton onClick={this._onDontRemove} kind="link_sm"
-                                      className="mx_ExistingEmailAddress_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onDontRemove}
+                        kind="link_sm"
+                        className="mx_ExistingEmailAddress_confirmBtn"
+                    >
                         {_t("Cancel")}
                     </AccessibleButton>
                 </div>
@@ -228,21 +234,28 @@ export default class EmailAddresses extends React.Component {
         );
         if (this.state.verifying) {
             addButton = (
-              <div>
-                  <div>{_t("We've sent you an email to verify your address. Please follow the instructions there and then click the button below.")}</div>
-                  <AccessibleButton onClick={this._onContinueClick} kind="primary"
-                                    disabled={this.state.continueDisabled}>
-                      {_t("Continue")}
-                  </AccessibleButton>
-              </div>
+                <div>
+                    <div>{_t("We've sent you an email to verify your address. Please follow the instructions there and then click the button below.")}</div>
+                    <AccessibleButton
+                        onClick={this._onContinueClick}
+                        kind="primary"
+                        disabled={this.state.continueDisabled}
+                    >
+                        {_t("Continue")}
+                    </AccessibleButton>
+                </div>
             );
         }
 
         return (
             <div className="mx_EmailAddresses">
                 {existingEmailElements}
-                <form onSubmit={this._onAddClick} autoComplete="off"
-                      noValidate={true} className="mx_EmailAddresses_new">
+                <form
+                    onSubmit={this._onAddClick}
+                    autoComplete="off"
+                    noValidate={true}
+                    className="mx_EmailAddresses_new"
+                >
                     <Field
                         type="text"
                         label={_t("Email Address")}

src/components/views/settings/account/PhoneNumbers.js

@@ -85,12 +85,18 @@ export class ExistingPhoneNumber extends React.Component {
                     <span className="mx_ExistingPhoneNumber_promptText">
                         {_t("Remove %(phone)s?", {phone: this.props.msisdn.address})}
                     </span>
-                    <AccessibleButton onClick={this._onActuallyRemove} kind="danger_sm"
-                                      className="mx_ExistingPhoneNumber_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onActuallyRemove}
+                        kind="danger_sm"
+                        className="mx_ExistingPhoneNumber_confirmBtn"
+                    >
                         {_t("Remove")}
                     </AccessibleButton>
-                    <AccessibleButton onClick={this._onDontRemove} kind="link_sm"
-                                      className="mx_ExistingPhoneNumber_confirmBtn">
+                    <AccessibleButton
+                        onClick={this._onDontRemove}
+                        kind="link_sm"
+                        className="mx_ExistingPhoneNumber_confirmBtn"
+                    >
                         {_t("Cancel")}
                     </AccessibleButton>
                 </div>
@@ -246,8 +252,11 @@ export default class PhoneNumbers extends React.Component {
                             value={this.state.newPhoneNumberCode}
                             onChange={this._onChangeNewPhoneNumberCode}
                         />
-                        <AccessibleButton onClick={this._onContinueClick} kind="primary"
-                                          disabled={this.state.continueDisabled}>
+                        <AccessibleButton
+                            onClick={this._onContinueClick}
+                            kind="primary"
+                            disabled={this.state.continueDisabled}
+                        >
                             {_t("Continue")}
                         </AccessibleButton>
                     </form>

src/components/views/settings/tabs/room/GeneralRoomSettingsTab.js

@@ -80,9 +80,11 @@ export default class GeneralRoomSettingsTab extends React.Component {
             flairSection = <>
                 <span className='mx_SettingsTab_subheading'>{_t("Flair")}</span>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
-                    <RelatedGroupSettings roomId={room.roomId}
-                                          canSetRelatedGroups={canChangeGroups}
-                                          relatedGroupsEvent={groupsEvent} />
+                    <RelatedGroupSettings
+                        roomId={room.roomId}
+                        canSetRelatedGroups={canChangeGroups}
+                        relatedGroupsEvent={groupsEvent}
+                    />
                 </div>
             </>;
         }
@@ -97,8 +99,8 @@ export default class GeneralRoomSettingsTab extends React.Component {
                 <div className="mx_SettingsTab_heading">{_t("Room Addresses")}</div>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
                     <AliasSettings roomId={this.props.roomId}
-                                   canSetCanonicalAlias={canSetCanonical} canSetAliases={canSetAliases}
-                                   canonicalAliasEvent={canonicalAliasEv} aliasEvents={aliasEvents} />
+                        canSetCanonicalAlias={canSetCanonical} canSetAliases={canSetAliases}
+                        canonicalAliasEvent={canonicalAliasEv} aliasEvents={aliasEvents} />
                 </div>
                 <div className="mx_SettingsTab_heading">{_t("Other")}</div>
                 { flairSection }

src/components/views/settings/tabs/room/NotificationSettingsTab.js

@@ -155,7 +155,7 @@ export default class NotificationsSettingsTab extends React.Component {
                     <div>
                         <span>{_t("Notification sound")}: <code>{this.state.currentSound}</code></span><br />
                         <AccessibleButton className="mx_NotificationSound_resetSound" disabled={this.state.currentSound == "default"} onClick={this._clearSound.bind(this)} kind="primary">
-                                {_t("Reset")}
+                            {_t("Reset")}
                         </AccessibleButton>
                     </div>
                     <div>
@@ -167,11 +167,11 @@ export default class NotificationsSettingsTab extends React.Component {
                         {currentUploadedFile}
 
                         <AccessibleButton className="mx_NotificationSound_browse" onClick={this._triggerUploader.bind(this)} kind="primary">
-                                {_t("Browse")}
+                            {_t("Browse")}
                         </AccessibleButton>
 
                         <AccessibleButton className="mx_NotificationSound_save" disabled={this.state.uploadedFile == null} onClick={this._onClickSaveSound.bind(this)} kind="primary">
-                                {_t("Save")}
+                            {_t("Save")}
                         </AccessibleButton>
                         <br />
                     </div>

src/components/views/settings/tabs/room/RolesRoomSettingsTab.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019, 2021 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.
@@ -15,7 +15,6 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import {_t, _td} from "../../../../../languageHandler";
 import {MatrixClientPeg} from "../../../../../MatrixClientPeg";
 import * as sdk from "../../../../..";
@@ -23,6 +22,9 @@ import AccessibleButton from "../../../elements/AccessibleButton";
 import Modal from "../../../../../Modal";
 import {replaceableComponent} from "../../../../../utils/replaceableComponent";
 import {EventType} from "matrix-js-sdk/src/@types/event";
+import { RoomMember } from "matrix-js-sdk/src/models/room-member";
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
+import { RoomState } from "matrix-js-sdk/src/models/room-state";
 
 const plEventsToLabels = {
     // These will be translated for us later.
@@ -63,15 +65,15 @@ function parseIntWithDefault(val, def) {
     return isNaN(res) ? def : res;
 }
 
-export class BannedUser extends React.Component {
-    static propTypes = {
-        canUnban: PropTypes.bool,
-        member: PropTypes.object.isRequired, // js-sdk RoomMember
-        by: PropTypes.string.isRequired,
-        reason: PropTypes.string,
-    };
+interface IBannedUserProps {
+    canUnban?: boolean;
+    member: RoomMember;
+    by: string;
+    reason?: string;
+}
 
-    _onUnbanClick = (e) => {
+export class BannedUser extends React.Component<IBannedUserProps> {
+    private onUnbanClick = (e) => {
         MatrixClientPeg.get().unban(this.props.member.roomId, this.props.member.userId).catch((err) => {
             const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
             console.error("Failed to unban: " + err);
@@ -87,8 +89,10 @@ export class BannedUser extends React.Component {
 
         if (this.props.canUnban) {
             unbanButton = (
-                <AccessibleButton kind='danger_sm' onClick={this._onUnbanClick}
-                                  className='mx_RolesRoomSettingsTab_unbanBtn'>
+                <AccessibleButton className='mx_RolesRoomSettingsTab_unbanBtn'
+                    kind='danger_sm'
+                    onClick={this.onUnbanClick}
+                >
                     { _t('Unban') }
                 </AccessibleButton>
             );
@@ -107,29 +111,29 @@ export class BannedUser extends React.Component {
     }
 }
 
-@replaceableComponent("views.settings.tabs.room.RolesRoomSettingsTab")
-export default class RolesRoomSettingsTab extends React.Component {
-    static propTypes = {
-        roomId: PropTypes.string.isRequired,
-    };
+interface IProps {
+    roomId: string;
+}
 
-    componentDidMount(): void {
-        MatrixClientPeg.get().on("RoomState.members", this._onRoomMembership);
+@replaceableComponent("views.settings.tabs.room.RolesRoomSettingsTab")
+export default class RolesRoomSettingsTab extends React.Component<IProps> {
+    componentDidMount() {
+        MatrixClientPeg.get().on("RoomState.members", this.onRoomMembership);
     }
 
-    componentWillUnmount(): void {
+    componentWillUnmount() {
         const client = MatrixClientPeg.get();
         if (client) {
-            client.removeListener("RoomState.members", this._onRoomMembership);
+            client.removeListener("RoomState.members", this.onRoomMembership);
         }
     }
 
-    _onRoomMembership = (event, state, member) => {
+    private onRoomMembership = (event: MatrixEvent, state: RoomState, member: RoomMember) => {
         if (state.roomId !== this.props.roomId) return;
         this.forceUpdate();
     };
 
-    _populateDefaultPlEvents(eventsSection, stateLevel, eventsLevel) {
+    private populateDefaultPlEvents(eventsSection: Record<string, number>, stateLevel: number, eventsLevel: number) {
         for (const desiredEvent of Object.keys(plEventsToShow)) {
             if (!(desiredEvent in eventsSection)) {
                 eventsSection[desiredEvent] = (plEventsToShow[desiredEvent].isState ? stateLevel : eventsLevel);
@@ -137,7 +141,7 @@ export default class RolesRoomSettingsTab extends React.Component {
         }
     }
 
-    _onPowerLevelsChanged = (value, powerLevelKey) => {
+    private onPowerLevelsChanged = (inputValue: string, powerLevelKey: string) => {
         const client = MatrixClientPeg.get();
         const room = client.getRoom(this.props.roomId);
         const plEvent = room.currentState.getStateEvents('m.room.power_levels', '');
@@ -148,7 +152,7 @@ export default class RolesRoomSettingsTab extends React.Component {
 
         const eventsLevelPrefix = "event_levels_";
 
-        value = parseInt(value);
+        const value = parseInt(inputValue);
 
         if (powerLevelKey.startsWith(eventsLevelPrefix)) {
             // deep copy "events" object, Object.assign itself won't deep copy
@@ -182,7 +186,7 @@ export default class RolesRoomSettingsTab extends React.Component {
         });
     };
 
-    _onUserPowerLevelChanged = (value, powerLevelKey) => {
+    private onUserPowerLevelChanged = (value: string, powerLevelKey: string) => {
         const client = MatrixClientPeg.get();
         const room = client.getRoom(this.props.roomId);
         const plEvent = room.currentState.getStateEvents('m.room.power_levels', '');
@@ -266,7 +270,7 @@ export default class RolesRoomSettingsTab extends React.Component {
             currentUserLevel = defaultUserLevel;
         }
 
-        this._populateDefaultPlEvents(
+        this.populateDefaultPlEvents(
             eventsLevels,
             parseIntWithDefault(plContent.state_default, powerLevelDescriptors.state_default.defaultValue),
             parseIntWithDefault(plContent.events_default, powerLevelDescriptors.events_default.defaultValue),
@@ -288,7 +292,7 @@ export default class RolesRoomSettingsTab extends React.Component {
                             label={user}
                             key={user}
                             powerLevelKey={user} // Will be sent as the second parameter to `onChange`
-                            onChange={this._onUserPowerLevelChanged}
+                            onChange={this.onUserPowerLevelChanged}
                         />,
                     );
                 } else if (userLevels[user] < defaultUserLevel) { // muted
@@ -299,7 +303,7 @@ export default class RolesRoomSettingsTab extends React.Component {
                             label={user}
                             key={user}
                             powerLevelKey={user} // Will be sent as the second parameter to `onChange`
-                            onChange={this._onUserPowerLevelChanged}
+                            onChange={this.onUserPowerLevelChanged}
                         />,
                     );
                 }
@@ -345,8 +349,9 @@ export default class RolesRoomSettingsTab extends React.Component {
                             if (sender) bannedBy = sender.name;
                             return (
                                 <BannedUser key={member.userId} canUnban={canBanUsers}
-                                            member={member} reason={banEvent.reason}
-                                            by={bannedBy} />
+                                    member={member} reason={banEvent.reason}
+                                    by={bannedBy}
+                                />
                             );
                         })}
                     </ul>
@@ -373,7 +378,7 @@ export default class RolesRoomSettingsTab extends React.Component {
                     usersDefault={defaultUserLevel}
                     disabled={!canChangeLevels || currentUserLevel < value}
                     powerLevelKey={key} // Will be sent as the second parameter to `onChange`
-                    onChange={this._onPowerLevelsChanged}
+                    onChange={this.onPowerLevelsChanged}
                 />
             </div>;
         });
@@ -398,7 +403,7 @@ export default class RolesRoomSettingsTab extends React.Component {
                         usersDefault={defaultUserLevel}
                         disabled={!canChangeLevels || currentUserLevel < eventsLevels[eventType]}
                         powerLevelKey={"event_levels_" + eventType}
-                        onChange={this._onPowerLevelsChanged}
+                        onChange={this.onPowerLevelsChanged}
                     />
                 </div>
             );

src/components/views/settings/tabs/room/SecurityRoomSettingsTab.tsx

@@ -1,5 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd
+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.
@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
+import { MatrixEvent } from "matrix-js-sdk/src/models/event";
 import {_t} from "../../../../../languageHandler";
 import {MatrixClientPeg} from "../../../../../MatrixClientPeg";
 import * as sdk from "../../../../..";
@@ -26,64 +26,92 @@ import StyledRadioGroup from '../../../elements/StyledRadioGroup';
 import {SettingLevel} from "../../../../../settings/SettingLevel";
 import SettingsStore from "../../../../../settings/SettingsStore";
 import {UIFeature} from "../../../../../settings/UIFeature";
-import {replaceableComponent} from "../../../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../../../utils/replaceableComponent";
+
+// Knock and private are reserved keywords which are not yet implemented.
+enum JoinRule {
+    Public = "public",
+    Knock = "knock",
+    Invite = "invite",
+    Private = "private",
+}
+
+enum GuestAccess {
+    CanJoin = "can_join",
+    Forbidden = "forbidden",
+}
+
+enum HistoryVisibility {
+    Invited = "invited",
+    Joined = "joined",
+    Shared = "shared",
+    WorldReadable = "world_readable",
+}
+
+interface IProps {
+    roomId: string;
+}
+
+interface IState {
+    joinRule: JoinRule;
+    guestAccess: GuestAccess;
+    history: HistoryVisibility;
+    hasAliases: boolean;
+    encrypted: boolean;
+}
 
 @replaceableComponent("views.settings.tabs.room.SecurityRoomSettingsTab")
-export default class SecurityRoomSettingsTab extends React.Component {
-    static propTypes = {
-        roomId: PropTypes.string.isRequired,
-    };
-
-    constructor() {
-        super();
+export default class SecurityRoomSettingsTab extends React.Component<IProps, IState> {
+    constructor(props) {
+        super(props);
 
         this.state = {
-            joinRule: "invite",
-            guestAccess: "can_join",
-            history: "shared",
+            joinRule: JoinRule.Invite,
+            guestAccess: GuestAccess.CanJoin,
+            history: HistoryVisibility.Shared,
             hasAliases: false,
             encrypted: false,
         };
     }
 
     // TODO: [REACT-WARNING] Move this to constructor
-    async UNSAFE_componentWillMount(): void { // eslint-disable-line camelcase
-        MatrixClientPeg.get().on("RoomState.events", this._onStateEvent);
+    async UNSAFE_componentWillMount() { // eslint-disable-line camelcase
+        MatrixClientPeg.get().on("RoomState.events", this.onStateEvent);
 
         const room = MatrixClientPeg.get().getRoom(this.props.roomId);
         const state = room.currentState;
 
-        const joinRule = this._pullContentPropertyFromEvent(
+        const joinRule: JoinRule = this.pullContentPropertyFromEvent(
             state.getStateEvents("m.room.join_rules", ""),
             'join_rule',
-            'invite',
+            JoinRule.Invite,
         );
-        const guestAccess = this._pullContentPropertyFromEvent(
+        const guestAccess: GuestAccess = this.pullContentPropertyFromEvent(
             state.getStateEvents("m.room.guest_access", ""),
             'guest_access',
-            'forbidden',
+            GuestAccess.Forbidden,
         );
-        const history = this._pullContentPropertyFromEvent(
+        const history: HistoryVisibility = this.pullContentPropertyFromEvent(
             state.getStateEvents("m.room.history_visibility", ""),
             'history_visibility',
-            'shared',
+            HistoryVisibility.Shared,
         );
         const encrypted = MatrixClientPeg.get().isRoomEncrypted(this.props.roomId);
         this.setState({joinRule, guestAccess, history, encrypted});
-        const hasAliases = await this._hasAliases();
+        const hasAliases = await this.hasAliases();
         this.setState({hasAliases});
     }
 
-    _pullContentPropertyFromEvent(event, key, defaultValue) {
+    private pullContentPropertyFromEvent<T>(event: MatrixEvent, key: string, defaultValue: T): T {
         if (!event || !event.getContent()) return defaultValue;
         return event.getContent()[key] || defaultValue;
     }
 
-    componentWillUnmount(): void {
-        MatrixClientPeg.get().removeListener("RoomState.events", this._onStateEvent);
+    componentWillUnmount() {
+        MatrixClientPeg.get().removeListener("RoomState.events", this.onStateEvent);
     }
 
-    _onStateEvent = (e) => {
+    private onStateEvent = (e: MatrixEvent) => {
         const refreshWhenTypes = [
             'm.room.join_rules',
             'm.room.guest_access',
@@ -93,7 +121,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         if (refreshWhenTypes.includes(e.getType())) this.forceUpdate();
     };
 
-    _onEncryptionChange = (e) => {
+    private onEncryptionChange = (e: React.ChangeEvent) => {
         Modal.createTrackedDialog('Enable encryption', '', QuestionDialog, {
             title: _t('Enable encryption?'),
             description: _t(
@@ -102,10 +130,9 @@ export default class SecurityRoomSettingsTab extends React.Component {
                 "may prevent many bots and bridges from working correctly. <a>Learn more about encryption.</a>",
                 {},
                 {
-                    'a': (sub) => {
-                        return <a rel='noreferrer noopener' target='_blank'
-                                  href='https://element.io/help#encryption'>{sub}</a>;
-                    },
+                    a: sub => <a href="https://element.io/help#encryption"
+                        rel="noreferrer noopener" target="_blank"
+                    >{sub}</a>,
                 },
             ),
             onFinished: (confirm) => {
@@ -127,12 +154,12 @@ export default class SecurityRoomSettingsTab extends React.Component {
         });
     };
 
-    _fixGuestAccess = (e) => {
+    private fixGuestAccess = (e: React.MouseEvent) => {
         e.preventDefault();
         e.stopPropagation();
 
-        const joinRule = "invite";
-        const guestAccess = "can_join";
+        const joinRule = JoinRule.Invite;
+        const guestAccess = GuestAccess.CanJoin;
 
         const beforeJoinRule = this.state.joinRule;
         const beforeGuestAccess = this.state.guestAccess;
@@ -149,7 +176,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         });
     };
 
-    _onRoomAccessRadioToggle = (roomAccess) => {
+    private onRoomAccessRadioToggle = (roomAccess: string) => {
         //                         join_rule
         //                      INVITE  |  PUBLIC
         //        ----------------------+----------------
@@ -163,20 +190,20 @@ export default class SecurityRoomSettingsTab extends React.Component {
         // invite them, you clearly want them to join, whether they're a
         // guest or not.  In practice, guest_access should probably have
         // been implemented as part of the join_rules enum.
-        let joinRule = "invite";
-        let guestAccess = "can_join";
+        let joinRule = JoinRule.Invite;
+        let guestAccess = GuestAccess.CanJoin;
 
         switch (roomAccess) {
             case "invite_only":
                 // no change - use defaults above
                 break;
             case "public_no_guests":
-                joinRule = "public";
-                guestAccess = "forbidden";
+                joinRule = JoinRule.Public;
+                guestAccess = GuestAccess.Forbidden;
                 break;
             case "public_with_guests":
-                joinRule = "public";
-                guestAccess = "can_join";
+                joinRule = JoinRule.Public;
+                guestAccess = GuestAccess.CanJoin;
                 break;
         }
 
@@ -195,7 +222,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         });
     };
 
-    _onHistoryRadioToggle = (history) => {
+    private onHistoryRadioToggle = (history: HistoryVisibility) => {
         const beforeHistory = this.state.history;
         this.setState({history: history});
         MatrixClientPeg.get().sendStateEvent(this.props.roomId, "m.room.history_visibility", {
@@ -206,11 +233,11 @@ export default class SecurityRoomSettingsTab extends React.Component {
         });
     };
 
-    _updateBlacklistDevicesFlag = (checked) => {
+    private updateBlacklistDevicesFlag = (checked: boolean) => {
         MatrixClientPeg.get().getRoom(this.props.roomId).setBlacklistUnverifiedDevices(checked);
     };
 
-    async _hasAliases() {
+    private async hasAliases(): Promise<boolean> {
         const cli = MatrixClientPeg.get();
         if (await cli.doesServerSupportUnstableFeature("org.matrix.msc2432")) {
             const response = await cli.unstableGetLocalAliases(this.props.roomId);
@@ -224,7 +251,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         }
     }
 
-    _renderRoomAccess() {
+    private renderRoomAccess() {
         const client = MatrixClientPeg.get();
         const room = client.getRoom(this.props.roomId);
         const joinRule = this.state.joinRule;
@@ -240,7 +267,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
                     <img src={require("../../../../../../res/img/warning.svg")} width={15} height={15} />
                     <span>
                         {_t("Guests cannot join this room even if explicitly invited.")}&nbsp;
-                        <a href="" onClick={this._fixGuestAccess}>{_t("Click here to fix")}</a>
+                        <a href="" onClick={this.fixGuestAccess}>{_t("Click here to fix")}</a>
                     </span>
                 </div>
             );
@@ -265,7 +292,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
                 <StyledRadioGroup
                     name="roomVis"
                     value={joinRule}
-                    onChange={this._onRoomAccessRadioToggle}
+                    onChange={this.onRoomAccessRadioToggle}
                     definitions={[
                         {
                             value: "invite_only",
@@ -291,7 +318,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         );
     }
 
-    _renderHistory() {
+    private renderHistory() {
         const client = MatrixClientPeg.get();
         const history = this.state.history;
         const state = client.getRoom(this.props.roomId).currentState;
@@ -306,25 +333,25 @@ export default class SecurityRoomSettingsTab extends React.Component {
                 <StyledRadioGroup
                     name="historyVis"
                     value={history}
-                    onChange={this._onHistoryRadioToggle}
+                    onChange={this.onHistoryRadioToggle}
                     definitions={[
                         {
-                            value: "world_readable",
+                            value: HistoryVisibility.WorldReadable,
                             disabled: !canChangeHistory,
                             label: _t("Anyone"),
                         },
                         {
-                            value: "shared",
+                            value: HistoryVisibility.Shared,
                             disabled: !canChangeHistory,
                             label: _t('Members only (since the point in time of selecting this option)'),
                         },
                         {
-                            value: "invited",
+                            value: HistoryVisibility.Invited,
                             disabled: !canChangeHistory,
                             label: _t('Members only (since they were invited)'),
                         },
                         {
-                            value: "joined",
+                            value: HistoryVisibility.Joined,
                             disabled: !canChangeHistory,
                             label: _t('Members only (since they joined)'),
                         },
@@ -348,7 +375,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
             encryptionSettings = <SettingsFlag
                 name="blacklistUnverifiedDevices"
                 level={SettingLevel.ROOM_DEVICE}
-                onChange={this._updateBlacklistDevicesFlag}
+                onChange={this.updateBlacklistDevicesFlag}
                 roomId={this.props.roomId}
             />;
         }
@@ -356,7 +383,7 @@ export default class SecurityRoomSettingsTab extends React.Component {
         let historySection = (<>
             <span className='mx_SettingsTab_subheading'>{_t("Who can read history?")}</span>
             <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
-                {this._renderHistory()}
+                {this.renderHistory()}
             </div>
         </>);
         if (!SettingsStore.getValue(UIFeature.RoomHistorySettings)) {
@@ -373,15 +400,16 @@ export default class SecurityRoomSettingsTab extends React.Component {
                         <div className='mx_SettingsTab_subsectionText'>
                             <span>{_t("Once enabled, encryption cannot be disabled.")}</span>
                         </div>
-                        <LabelledToggleSwitch value={isEncrypted} onChange={this._onEncryptionChange}
-                                              label={_t("Encrypted")} disabled={!canEnableEncryption} />
+                        <LabelledToggleSwitch value={isEncrypted} onChange={this.onEncryptionChange}
+                            label={_t("Encrypted")} disabled={!canEnableEncryption}
+                        />
                     </div>
                     {encryptionSettings}
                 </div>
 
                 <span className='mx_SettingsTab_subheading'>{_t("Who can access this room?")}</span>
                 <div className='mx_SettingsTab_section mx_SettingsTab_subsectionText'>
-                    {this._renderRoomAccess()}
+                    {this.renderRoomAccess()}
                 </div>
 
                 {historySection}

src/components/views/settings/tabs/user/GeneralUserSettingsTab.js

@@ -192,7 +192,11 @@ export default class GeneralUserSettingsTab extends React.Component {
 
         SettingsStore.setValue("language", null, SettingLevel.DEVICE, newLanguage);
         this.setState({language: newLanguage});
-        PlatformPeg.get().reload();
+        const platform = PlatformPeg.get();
+        if (platform) {
+            platform.setLanguage(newLanguage);
+            platform.reload();
+        }
     };
 
     _onSpellCheckLanguagesChange = (languages) => {
@@ -319,8 +323,11 @@ export default class GeneralUserSettingsTab extends React.Component {
         return (
             <div className="mx_SettingsTab_section">
                 <span className="mx_SettingsTab_subheading">{_t("Language and region")}</span>
-                <LanguageDropdown className="mx_GeneralUserSettingsTab_languageInput"
-                                  onOptionChange={this._onLanguageChange} value={this.state.language} />
+                <LanguageDropdown
+                    className="mx_GeneralUserSettingsTab_languageInput"
+                    onOptionChange={this._onLanguageChange}
+                    value={this.state.language}
+                />
             </div>
         );
     }
@@ -329,8 +336,10 @@ export default class GeneralUserSettingsTab extends React.Component {
         return (
             <div className="mx_SettingsTab_section">
                 <span className="mx_SettingsTab_subheading">{_t("Spell check dictionaries")}</span>
-                <SpellCheckSettings languages={this.state.spellCheckLanguages}
-                                    onLanguagesChange={this._onSpellCheckLanguagesChange} />
+                <SpellCheckSettings
+                    languages={this.state.spellCheckLanguages}
+                    onLanguagesChange={this._onSpellCheckLanguagesChange}
+                />
             </div>
         );
     }

src/components/views/settings/tabs/user/HelpUserSettingsTab.tsx

@@ -1,6 +1,5 @@
 /*
-Copyright 2019 New Vector Ltd
-Copyright 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.
@@ -16,27 +15,37 @@ limitations under the License.
 */
 
 import React from 'react';
-import PropTypes from 'prop-types';
 import {_t, getCurrentLanguage} from "../../../../../languageHandler";
 import {MatrixClientPeg} from "../../../../../MatrixClientPeg";
 import AccessibleButton from "../../../elements/AccessibleButton";
+import AccessibleTooltipButton from '../../../elements/AccessibleTooltipButton';
 import SdkConfig from "../../../../../SdkConfig";
 import createRoom from "../../../../../createRoom";
 import Modal from "../../../../../Modal";
-import * as sdk from "../../../../../";
+import * as sdk from "../../../../..";
 import PlatformPeg from "../../../../../PlatformPeg";
 import * as KeyboardShortcuts from "../../../../../accessibility/KeyboardShortcuts";
 import UpdateCheckButton from "../../UpdateCheckButton";
-import {replaceableComponent} from "../../../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../../../utils/replaceableComponent";
+import { copyPlaintext } from "../../../../../utils/strings";
+import * as ContextMenu from "../../../../structures/ContextMenu";
+import { toRightOf } from "../../../../structures/ContextMenu";
+
+interface IProps {
+    closeSettingsFn: () => {};
+}
+
+interface IState {
+    appVersion: string;
+    canUpdate: boolean;
+}
 
 @replaceableComponent("views.settings.tabs.user.HelpUserSettingsTab")
-export default class HelpUserSettingsTab extends React.Component {
-    static propTypes = {
-        closeSettingsFn: PropTypes.func.isRequired,
-    };
+export default class HelpUserSettingsTab extends React.Component<IProps, IState> {
+    protected closeCopiedTooltip: () => void;
 
-    constructor() {
-        super();
+    constructor(props) {
+        super(props);
 
         this.state = {
             appVersion: null,
@@ -53,7 +62,13 @@ export default class HelpUserSettingsTab extends React.Component {
         });
     }
 
-    _onClearCacheAndReload = (e) => {
+    componentWillUnmount() {
+        // if the Copied tooltip is open then get rid of it, there are ways to close the modal which wouldn't close
+        // the tooltip otherwise, such as pressing Escape
+        if (this.closeCopiedTooltip) this.closeCopiedTooltip();
+    }
+
+    private onClearCacheAndReload = (e) => {
         if (!PlatformPeg.get()) return;
 
         // Dev note: please keep this log line, it's useful when troubleshooting a MatrixClient suddenly
@@ -65,7 +80,7 @@ export default class HelpUserSettingsTab extends React.Component {
         });
     };
 
-    _onBugReport = (e) => {
+    private onBugReport = (e) => {
         const BugReportDialog = sdk.getComponent("dialogs.BugReportDialog");
         if (!BugReportDialog) {
             return;
@@ -73,7 +88,7 @@ export default class HelpUserSettingsTab extends React.Component {
         Modal.createTrackedDialog('Bug Report Dialog', '', BugReportDialog, {});
     };
 
-    _onStartBotChat = (e) => {
+    private onStartBotChat = (e) => {
         this.props.closeSettingsFn();
         createRoom({
             dmUserId: SdkConfig.get().welcomeUserId,
@@ -81,7 +96,7 @@ export default class HelpUserSettingsTab extends React.Component {
         });
     };
 
-    _showSpoiler = (event) => {
+    private showSpoiler = (event) => {
         const target = event.target;
         target.innerHTML = target.getAttribute('data-spoiler');
 
@@ -93,7 +108,7 @@ export default class HelpUserSettingsTab extends React.Component {
         selection.addRange(range);
     };
 
-    _renderLegal() {
+    private renderLegal() {
         const tocLinks = SdkConfig.get().terms_and_conditions_links;
         if (!tocLinks) return null;
 
@@ -114,7 +129,7 @@ export default class HelpUserSettingsTab extends React.Component {
         );
     }
 
-    _renderCredits() {
+    private renderCredits() {
         // Note: This is not translated because it is legal text.
         // Also, &nbsp; is ugly but necessary.
         return (
@@ -122,34 +137,48 @@ export default class HelpUserSettingsTab extends React.Component {
                 <span className='mx_SettingsTab_subheading'>{_t("Credits")}</span>
                 <ul>
                     <li>
-                        The <a href="themes/element/img/backgrounds/lake.jpg" rel="noreferrer noopener" target="_blank">
-                        default cover photo</a> is ©&nbsp;
-                        <a href="https://www.flickr.com/golan" rel="noreferrer noopener" target="_blank">Jesús Roncero</a>{' '}
-                        used under the terms of&nbsp;
-                        <a href="https://creativecommons.org/licenses/by-sa/4.0/" rel="noreferrer noopener" target="_blank">
-                        CC-BY-SA 4.0</a>.
+                        The <a href="themes/element/img/backgrounds/lake.jpg" rel="noreferrer noopener"
+                            target="_blank">default cover photo</a> is ©&nbsp;
+                        <a href="https://www.flickr.com/golan" rel="noreferrer noopener"
+                            target="_blank">Jesús Roncero</a> used under the terms of&nbsp;
+                        <a href="https://creativecommons.org/licenses/by-sa/4.0/" rel="noreferrer noopener"
+                            target="_blank">CC-BY-SA 4.0</a>.
                     </li>
                     <li>
                         The <a href="https://github.com/matrix-org/twemoji-colr" rel="noreferrer noopener"
-                               target="_blank"> twemoji-colr</a> font is ©&nbsp;
-                        <a href="https://mozilla.org" rel="noreferrer noopener" target="_blank">Mozilla Foundation</a>{' '}
-                        used under the terms of&nbsp;
-                        <a href="http://www.apache.org/licenses/LICENSE-2.0" rel="noreferrer noopener" target="_blank">
-                        Apache 2.0</a>.
+                            target="_blank">twemoji-colr</a> font is ©&nbsp;
+                        <a href="https://mozilla.org" rel="noreferrer noopener"
+                            target="_blank">Mozilla Foundation</a> used under the terms of&nbsp;
+                        <a href="http://www.apache.org/licenses/LICENSE-2.0" rel="noreferrer noopener"
+                            target="_blank">Apache 2.0</a>.
                     </li>
                     <li>
-                        The <a href="https://twemoji.twitter.com/" rel="noreferrer noopener" target="_blank">
-                        Twemoji</a> emoji art is ©&nbsp;
-                        <a href="https://twemoji.twitter.com/" rel="noreferrer noopener" target="_blank">Twitter, Inc and other
-                        contributors</a> used under the terms of&nbsp;
-                        <a href="https://creativecommons.org/licenses/by/4.0/" rel="noreferrer noopener" target="_blank">
-                        CC-BY 4.0</a>.
+                        The <a href="https://twemoji.twitter.com/" rel="noreferrer noopener"
+                            target="_blank">Twemoji</a> emoji art is ©&nbsp;
+                        <a href="https://twemoji.twitter.com/" rel="noreferrer noopener"
+                            target="_blank">Twitter, Inc and other contributors</a> used under the terms of&nbsp;
+                        <a href="https://creativecommons.org/licenses/by/4.0/" rel="noreferrer noopener"
+                            target="_blank">CC-BY 4.0</a>.
                     </li>
                 </ul>
             </div>
         );
     }
 
+    onAccessTokenCopyClick = async (e) => {
+        e.preventDefault();
+        const target = e.target; // copy target before we go async and React throws it away
+
+        const successful = await copyPlaintext(MatrixClientPeg.get().getAccessToken());
+        const buttonRect = target.getBoundingClientRect();
+        const GenericTextContextMenu = sdk.getComponent('context_menus.GenericTextContextMenu');
+        const {close} = ContextMenu.createMenu(GenericTextContextMenu, {
+            ...toRightOf(buttonRect, 2),
+            message: successful ? _t('Copied!') : _t('Failed to copy'),
+        });
+        this.closeCopiedTooltip = target.onmouseleave = close;
+    }
+
     render() {
         const brand = SdkConfig.get().brand;
 
@@ -188,7 +217,7 @@ export default class HelpUserSettingsTab extends React.Component {
                         },
                     )}
                     <div>
-                        <AccessibleButton onClick={this._onStartBotChat} kind='primary'>
+                        <AccessibleButton onClick={this.onStartBotChat} kind='primary'>
                             {_t("Chat with %(brand)s Bot", { brand })}
                         </AccessibleButton>
                     </div>
@@ -212,28 +241,27 @@ export default class HelpUserSettingsTab extends React.Component {
                 <div className="mx_SettingsTab_section">
                     <span className='mx_SettingsTab_subheading'>{_t('Bug reporting')}</span>
                     <div className='mx_SettingsTab_subsectionText'>
-                        {
-                            _t( "If you've submitted a bug via GitHub, debug logs can help " +
-                                "us track down the problem. 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.",
-                            )
-                        }
+                        {_t(
+                            "If you've submitted a bug via GitHub, debug logs can help " +
+                            "us track down the problem. 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.",
+                        )}
                         <div className='mx_HelpUserSettingsTab_debugButton'>
-                            <AccessibleButton onClick={this._onBugReport} kind='primary'>
+                            <AccessibleButton onClick={this.onBugReport} kind='primary'>
                                 {_t("Submit debug logs")}
                             </AccessibleButton>
                         </div>
-                        {
-                            _t( "To report a Matrix-related security issue, please read the Matrix.org " +
-                                "<a>Security Disclosure Policy</a>.", {},
-                                {
-                                    'a': (sub) =>
-                                        <a href="https://matrix.org/security-disclosure-policy/"
-                                           rel="noreferrer noopener" target="_blank">{sub}</a>,
-                                })
-                        }
+                        {_t(
+                            "To report a Matrix-related security issue, please read the Matrix.org " +
+                            "<a>Security Disclosure Policy</a>.", {},
+                            {
+                                a: sub => <a href="https://matrix.org/security-disclosure-policy/"
+                                    rel="noreferrer noopener" target="_blank"
+                                >{sub}</a>,
+                            },
+                        )}
                     </div>
                 </div>
             );
@@ -260,20 +288,29 @@ export default class HelpUserSettingsTab extends React.Component {
                         {updateButton}
                     </div>
                 </div>
-                {this._renderLegal()}
-                {this._renderCredits()}
+                {this.renderLegal()}
+                {this.renderCredits()}
                 <div className='mx_SettingsTab_section mx_HelpUserSettingsTab_versions'>
                     <span className='mx_SettingsTab_subheading'>{_t("Advanced")}</span>
                     <div className='mx_SettingsTab_subsectionText'>
                         {_t("Homeserver is")} <code>{MatrixClientPeg.get().getHomeserverUrl()}</code><br />
                         {_t("Identity Server is")} <code>{MatrixClientPeg.get().getIdentityServerUrl()}</code><br />
-                        {_t("Access Token:") + ' '}
-                        <AccessibleButton element="span" onClick={this._showSpoiler}
-                                          data-spoiler={MatrixClientPeg.get().getAccessToken()}>
-                            &lt;{ _t("click to reveal") }&gt;
-                        </AccessibleButton>
+                        <br />
+                        <details>
+                            <summary>{_t("Access Token")}</summary><br />
+                            <b>{_t("Your access token gives full access to your account."
+                               + " Do not share it with anyone." )}</b>
+                            <div className="mx_HelpUserSettingsTab_accessToken">
+                                <code>{MatrixClientPeg.get().getAccessToken()}</code>
+                                <AccessibleTooltipButton
+                                    title={_t("Copy")}
+                                    onClick={this.onAccessTokenCopyClick}
+                                    className="mx_HelpUserSettingsTab_accessToken_copy"
+                                />
+                            </div>
+                        </details><br />
                         <div className='mx_HelpUserSettingsTab_debugButton'>
-                            <AccessibleButton onClick={this._onClearCacheAndReload} kind='danger'>
+                            <AccessibleButton onClick={this.onClearCacheAndReload} kind='danger'>
                                 {_t("Clear cache and reload")}
                             </AccessibleButton>
                         </div>