Merge branch 'develop' of github.com:matrix-org/matrix-react-sdk into pr/only-member-warning

src/components/structures/GroupView.js

@@ -981,7 +981,7 @@ export default class GroupView extends React.Component {
                     <Spinner />
                 </div>;
             }
-            const httpInviterAvatar = this.state.inviterProfile
+            const httpInviterAvatar = this.state.inviterProfile && this.state.inviterProfile.avatarUrl
                 ? mediaFromMxc(this.state.inviterProfile.avatarUrl).getSquareThumbnailHttp(36)
                 : null;
 

src/components/structures/MatrixChat.tsx

@@ -84,6 +84,7 @@ import {replaceableComponent} from "../../utils/replaceableComponent";
 import RoomListStore from "../../stores/room-list/RoomListStore";
 import {RoomUpdateCause} from "../../stores/room-list/models";
 import defaultDispatcher from "../../dispatcher/dispatcher";
+import SecurityCustomisations from "../../customisations/Security";
 
 /** constants for MatrixChat.state.view */
 export enum Views {
@@ -395,7 +396,11 @@ export default class MatrixChat extends React.PureComponent<IProps, IState> {
 
         const crossSigningIsSetUp = cli.getStoredCrossSigningForUser(cli.getUserId());
         if (crossSigningIsSetUp) {
-            this.setStateForNewView({ view: Views.COMPLETE_SECURITY });
+            if (SecurityCustomisations.SHOW_ENCRYPTION_SETUP_UI === false) {
+                this.onLoggedIn();
+            } else {
+                this.setStateForNewView({view: Views.COMPLETE_SECURITY});
+            }
         } else if (await cli.doesServerSupportUnstableFeature("org.matrix.e2e_cross_signing")) {
             this.setStateForNewView({ view: Views.E2E_SETUP });
         } else {

src/components/structures/MessagePanel.js

@@ -659,6 +659,7 @@ export default class MessagePanel extends React.Component {
                         showReactions={this.props.showReactions}
                         layout={this.props.layout}
                         enableFlair={this.props.enableFlair}
+                        showReadReceipts={this.props.showReadReceipts}
                     />
                 </TileErrorBoundary>
             </li>,

src/components/structures/RoomView.tsx

@@ -1137,10 +1137,16 @@ export default class RoomView extends React.Component<IProps, IState> {
         ev.stopPropagation();
         ev.preventDefault();
 
-        this.setState({
-            dragCounter: this.state.dragCounter + 1,
-            draggingFile: true,
-        });
+        // We always increment the counter no matter the types, because dragging is
+        // still happening. If we didn't, the drag counter would get out of sync.
+        this.setState({dragCounter: this.state.dragCounter + 1});
+
+        // See:
+        // https://docs.w3cub.com/dom/datatransfer/types
+        // https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/Recommended_drag_types#file
+        if (ev.dataTransfer.types.includes("Files") || ev.dataTransfer.types.includes("application/x-moz-file")) {
+            this.setState({draggingFile: true});
+        }
     };
 
     private onDragLeave = ev => {
@@ -1164,6 +1170,9 @@ export default class RoomView extends React.Component<IProps, IState> {
 
         ev.dataTransfer.dropEffect = 'none';
 
+        // See:
+        // https://docs.w3cub.com/dom/datatransfer/types
+        // https://developer.mozilla.org/en-US/docs/Web/API/HTML_Drag_and_Drop_API/Recommended_drag_types#file
         if (ev.dataTransfer.types.includes("Files") || ev.dataTransfer.types.includes("application/x-moz-file")) {
             ev.dataTransfer.dropEffect = 'copy';
         }

src/components/structures/UserMenu.tsx

@@ -74,6 +74,7 @@ interface IState {
 export default class UserMenu extends React.Component<IProps, IState> {
     private dispatcherRef: string;
     private themeWatcherRef: string;
+    private dndWatcherRef: string;
     private buttonRef: React.RefObject<HTMLButtonElement> = createRef();
     private tagStoreRef: fbEmitter.EventSubscription;
 
@@ -89,6 +90,9 @@ export default class UserMenu extends React.Component<IProps, IState> {
         if (SettingsStore.getValue("feature_spaces")) {
             SpaceStore.instance.on(UPDATE_SELECTED_SPACE, this.onSelectedSpaceUpdate);
         }
+
+        // Force update is the easiest way to trigger the UI update (we don't store state for this)
+        this.dndWatcherRef = SettingsStore.watchSetting("doNotDisturb", null, () => this.forceUpdate());
     }
 
     private get hasHomePage(): boolean {
@@ -103,6 +107,7 @@ export default class UserMenu extends React.Component<IProps, IState> {
 
     public componentWillUnmount() {
         if (this.themeWatcherRef) SettingsStore.unwatchSetting(this.themeWatcherRef);
+        if (this.dndWatcherRef) SettingsStore.unwatchSetting(this.dndWatcherRef);
         if (this.dispatcherRef) defaultDispatcher.unregister(this.dispatcherRef);
         OwnProfileStore.instance.off(UPDATE_EVENT, this.onProfileUpdate);
         this.tagStoreRef.remove();
@@ -288,6 +293,12 @@ export default class UserMenu extends React.Component<IProps, IState> {
         this.setState({contextMenuPosition: null}); // also close the menu
     };
 
+    private onDndToggle = (ev) => {
+        ev.stopPropagation();
+        const current = SettingsStore.getValue("doNotDisturb");
+        SettingsStore.setValue("doNotDisturb", null, SettingLevel.DEVICE, !current);
+    };
+
     private renderContextMenu = (): React.ReactNode => {
         if (!this.state.contextMenuPosition) return null;
 
@@ -534,6 +545,7 @@ export default class UserMenu extends React.Component<IProps, IState> {
                 {/* masked image in CSS */}
             </span>
         );
+        let dnd;
         if (this.state.selectedSpace) {
             name = (
                 <div className="mx_UserMenu_doubleName">
@@ -560,6 +572,16 @@ export default class UserMenu extends React.Component<IProps, IState> {
                 </div>
             );
             isPrototype = true;
+        } else if (SettingsStore.getValue("feature_dnd")) {
+            const isDnd = SettingsStore.getValue("doNotDisturb");
+            dnd = <AccessibleButton
+                onClick={this.onDndToggle}
+                className={classNames({
+                    "mx_UserMenu_dnd": true,
+                    "mx_UserMenu_dnd_noisy": !isDnd,
+                    "mx_UserMenu_dnd_muted": isDnd,
+                })}
+            />;
         }
         if (this.props.isMinimized) {
             name = null;
@@ -595,6 +617,7 @@ export default class UserMenu extends React.Component<IProps, IState> {
                             />
                         </span>
                         {name}
+                        {dnd}
                         {buttons}
                     </div>
                 </ContextMenuButton>

src/components/structures/auth/ForgotPassword.js

@@ -18,7 +18,7 @@ limitations under the License.
 
 import React from 'react';
 import PropTypes from 'prop-types';
-import { _t } from '../../../languageHandler';
+import { _t, _td } from '../../../languageHandler';
 import * as sdk from '../../../index';
 import Modal from "../../../Modal";
 import PasswordReset from "../../../PasswordReset";
@@ -27,7 +27,9 @@ import classNames from 'classnames';
 import AuthPage from "../../views/auth/AuthPage";
 import CountlyAnalytics from "../../../CountlyAnalytics";
 import ServerPicker from "../../views/elements/ServerPicker";
+import PassphraseField from '../../views/auth/PassphraseField';
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { PASSWORD_MIN_SCORE } from '../../views/auth/RegistrationForm';
 
 // Phases
 // Show the forgot password inputs
@@ -137,10 +139,14 @@ export default class ForgotPassword extends React.Component {
         // refresh the server errors, just in case the server came back online
         await this._checkServerLiveliness(this.props.serverConfig);
 
+        await this['password_field'].validate({ allowEmpty: false });
+
         if (!this.state.email) {
             this.showErrorDialog(_t('The email address linked to your account must be entered.'));
         } else if (!this.state.password || !this.state.password2) {
             this.showErrorDialog(_t('A new password must be entered.'));
+        } else if (!this.state.passwordFieldValid) {
+            this.showErrorDialog(_t('Please choose a strong password'));
         } else if (this.state.password !== this.state.password2) {
             this.showErrorDialog(_t('New passwords must match each other.'));
         } else {
@@ -186,6 +192,12 @@ export default class ForgotPassword extends React.Component {
         });
     }
 
+    onPasswordValidate(result) {
+        this.setState({
+            passwordFieldValid: result.valid,
+        });
+    }
+
     renderForgot() {
         const Field = sdk.getComponent('elements.Field');
 
@@ -230,12 +242,15 @@ export default class ForgotPassword extends React.Component {
                     />
                 </div>
                 <div className="mx_AuthBody_fieldRow">
-                    <Field
+                    <PassphraseField
                         name="reset_password"
                         type="password"
-                        label={_t('New Password')}
+                        label={_td('New Password')}
                         value={this.state.password}
+                        minScore={PASSWORD_MIN_SCORE}
                         onChange={this.onInputChanged.bind(this, "password")}
+                        fieldRef={field => this['password_field'] = field}
+                        onValidate={(result) => this.onPasswordValidate(result)}
                         onFocus={() => CountlyAnalytics.instance.track("onboarding_forgot_password_newPassword_focus")}
                         onBlur={() => CountlyAnalytics.instance.track("onboarding_forgot_password_newPassword_blur")}
                         autoComplete="new-password"

src/components/structures/auth/Registration.tsx

@@ -436,6 +436,8 @@ export default class Registration extends React.Component<IProps, IState> {
             // ok fine, there's still no session: really go to the login page
             this.props.onLoginClick();
         }
+
+        return sessionLoaded;
     };
 
     private renderRegisterComponent() {
@@ -557,7 +559,12 @@ export default class Registration extends React.Component<IProps, IState> {
                             loggedInUserId: this.state.differentLoggedInUserId,
                         },
                     )}</p>
-                    <p><AccessibleButton element="span" className="mx_linkButton" onClick={this.onLoginClickWithCheck}>
+                    <p><AccessibleButton element="span" className="mx_linkButton" onClick={async event => {
+                        const sessionLoaded = await this.onLoginClickWithCheck(event);
+                        if (sessionLoaded) {
+                            dis.dispatch({action: "view_welcome_page"});
+                        }
+                    }}>
                         {_t("Continue with previous account")}
                     </AccessibleButton></p>
                 </div>;

src/components/views/auth/RegistrationForm.tsx

@@ -40,7 +40,7 @@ enum RegistrationField {
     PasswordConfirm = "field_password_confirm",
 }
 
-const PASSWORD_MIN_SCORE = 3; // safely unguessable: moderate protection from offline slow-hash scenario.
+export const PASSWORD_MIN_SCORE = 3; // safely unguessable: moderate protection from offline slow-hash scenario.
 
 interface IProps {
     // Values pre-filled in the input boxes when the component loads

src/components/views/avatars/RoomAvatar.tsx

@@ -129,7 +129,7 @@ export default class RoomAvatar extends React.Component<IProps, IState> {
             name: this.props.room.name,
         };
 
-        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
+        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox", null, true);
     };
 
     public render() {

src/components/views/context_menus/MessageContextMenu.js

@@ -52,6 +52,9 @@ export default class MessageContextMenu extends React.Component {
 
         /* callback called when the menu is dismissed */
         onFinished: PropTypes.func,
+
+        /* if the menu is inside a dialog, we sometimes need to close that dialog after click (forwarding) */
+        onCloseDialog: PropTypes.func,
     };
 
     state = {
@@ -141,6 +144,7 @@ export default class MessageContextMenu extends React.Component {
 
                 const cli = MatrixClientPeg.get();
                 try {
+                    if (this.props.onCloseDialog) this.props.onCloseDialog();
                     await cli.redactEvent(
                         this.props.mxEvent.getRoomId(),
                         this.props.mxEvent.getId(),
@@ -190,6 +194,7 @@ export default class MessageContextMenu extends React.Component {
     };
 
     onForwardClick = () => {
+        if (this.props.onCloseDialog) this.props.onCloseDialog();
         dis.dispatch({
             action: 'forward_event',
             event: this.props.mxEvent,

src/components/views/dialogs/InviteDialog.tsx

@@ -29,7 +29,10 @@ import dis from "../../../dispatcher/dispatcher";
 import IdentityAuthClient from "../../../IdentityAuthClient";
 import Modal from "../../../Modal";
 import {humanizeTime} from "../../../utils/humanize";
-import createRoom, {canEncryptToAllUsers, findDMForUser, privateShouldBeEncrypted} from "../../../createRoom";
+import createRoom, {
+    canEncryptToAllUsers, ensureDMExists, findDMForUser, privateShouldBeEncrypted,
+    IInvite3PID,
+} from "../../../createRoom";
 import {inviteMultipleToRoom, showCommunityInviteDialog} from "../../../RoomInvite";
 import {Key} from "../../../Keyboard";
 import {Action} from "../../../dispatcher/actions";
@@ -332,6 +335,7 @@ interface IInviteDialogState {
     threepidResultsMixin: { user: Member, userId: string}[];
     canUseIdentityServer: boolean;
     tryingIdentityServer: boolean;
+    consultFirst: boolean;
 
     // These two flags are used for the 'Go' button to communicate what is going on.
     busy: boolean,
@@ -380,6 +384,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             threepidResultsMixin: [],
             canUseIdentityServer: !!MatrixClientPeg.get().getIdentityServerUrl(),
             tryingIdentityServer: false,
+            consultFirst: false,
 
             // These two flags are used for the 'Go' button to communicate what is going on.
             busy: false,
@@ -395,6 +400,10 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
         }
     }
 
+    private onConsultFirstChange = (ev) => {
+        this.setState({consultFirst: ev.target.checked});
+    }
+
     static buildRecents(excludedTargetIds: Set<string>): {userId: string, user: RoomMember, lastActive: number}[] {
         const rooms = DMRoomMap.shared().getUniqueRoomsWithIndividuals(); // map of userId => js-sdk Room
 
@@ -610,13 +619,14 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
 
     _startDm = async () => {
         this.setState({busy: true});
+        const client = MatrixClientPeg.get();
         const targets = this._convertFilter();
         const targetIds = targets.map(t => t.userId);
 
         // Check if there is already a DM with these people and reuse it if possible.
         let existingRoom: Room;
         if (targetIds.length === 1) {
-            existingRoom = findDMForUser(MatrixClientPeg.get(), targetIds[0]);
+            existingRoom = findDMForUser(client, targetIds[0]);
         } else {
             existingRoom = DMRoomMap.shared().getDMRoomForIdentifiers(targetIds);
         }
@@ -638,7 +648,6 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             // If so, enable encryption in the new room.
             const has3PidMembers = targets.some(t => t instanceof ThreepidMember);
             if (!has3PidMembers) {
-                const client = MatrixClientPeg.get();
                 const allHaveDeviceKeys = await canEncryptToAllUsers(client, targetIds);
                 if (allHaveDeviceKeys) {
                     createRoomOptions.encryption = true;
@@ -648,35 +657,41 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
 
         // Check if it's a traditional DM and create the room if required.
         // TODO: [Canonical DMs] Remove this check and instead just create the multi-person DM
-        let createRoomPromise = Promise.resolve(null) as Promise<string | null | boolean>;
-        const isSelf = targetIds.length === 1 && targetIds[0] === MatrixClientPeg.get().getUserId();
-        if (targetIds.length === 1 && !isSelf) {
-            createRoomOptions.dmUserId = targetIds[0];
-            createRoomPromise = createRoom(createRoomOptions);
-        } else if (isSelf) {
-            createRoomPromise = createRoom(createRoomOptions);
-        } else {
-            // Create a boring room and try to invite the targets manually.
-            createRoomPromise = createRoom(createRoomOptions).then(roomId => {
-                return inviteMultipleToRoom(roomId, targetIds);
-            }).then(result => {
-                if (this._shouldAbortAfterInviteError(result)) {
-                    return true; // abort
-                }
-            });
-        }
+        try {
+            const isSelf = targetIds.length === 1 && targetIds[0] === client.getUserId();
+            if (targetIds.length === 1 && !isSelf) {
+                createRoomOptions.dmUserId = targetIds[0];
+            }
 
-        // the createRoom call will show the room for us, so we don't need to worry about that.
-        createRoomPromise.then(abort => {
-            if (abort === true) return; // only abort on true booleans, not roomIds or something
+            if (targetIds.length > 1) {
+                createRoomOptions.createOpts = targetIds.reduce(
+                    (roomOptions, address) => {
+                        const type = getAddressType(address);
+                        if (type === 'email') {
+                            const invite: IInvite3PID = {
+                                id_server: client.getIdentityServerUrl(true),
+                                medium: 'email',
+                                address,
+                            };
+                            roomOptions.invite_3pid.push(invite);
+                        } else if (type === 'mx-user-id') {
+                            roomOptions.invite.push(address);
+                        }
+                        return roomOptions;
+                    },
+                    { invite: [], invite_3pid: [] },
+                )
+            }
+
+            await createRoom(createRoomOptions);
             this.props.onFinished();
-        }).catch(err => {
+        } catch (err) {
             console.error(err);
             this.setState({
                 busy: false,
                 errorText: _t("We couldn't create your DM."),
             });
-        });
+        }
     };
 
     _inviteUsers = async () => {
@@ -704,8 +719,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
                 this.props.onFinished();
             }
 
-            if (cli.isRoomEncrypted(this.props.roomId) &&
-                SettingsStore.getValue("feature_room_history_key_sharing")) {
+            if (cli.isRoomEncrypted(this.props.roomId)) {
                 const visibilityEvent = room.currentState.getStateEvents(
                     "m.room.history_visibility", "",
                 );
@@ -745,16 +759,34 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             });
         }
 
-        this.setState({busy: true});
-        try {
-            await this.props.call.transfer(targetIds[0]);
-            this.setState({busy: false});
-            this.props.onFinished();
-        } catch (e) {
-            this.setState({
-                busy: false,
-                errorText: _t("Failed to transfer call"),
+        if (this.state.consultFirst) {
+            const dmRoomId = await ensureDMExists(MatrixClientPeg.get(), targetIds[0]);
+
+            dis.dispatch({
+                action: 'place_call',
+                type: this.props.call.type,
+                room_id: dmRoomId,
+                transferee: this.props.call,
             });
+            dis.dispatch({
+                action: 'view_room',
+                room_id: dmRoomId,
+                should_peek: false,
+                joining: false,
+            });
+            this.props.onFinished();
+        } else {
+            this.setState({busy: true});
+            try {
+                await this.props.call.transfer(targetIds[0]);
+                this.setState({busy: false});
+                this.props.onFinished();
+            } catch (e) {
+                this.setState({
+                    busy: false,
+                    errorText: _t("Failed to transfer call"),
+                });
+            }
         }
     };
 
@@ -1215,6 +1247,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
         let helpText;
         let buttonText;
         let goButtonFn;
+        let consultSection;
         let keySharingWarning = <span />;
 
         const identityServersEnabled = SettingsStore.getValue(UIFeature.IdentityServer);
@@ -1317,8 +1350,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             buttonText = _t("Invite");
             goButtonFn = this._inviteUsers;
 
-            if (SettingsStore.getValue("feature_room_history_key_sharing") &&
-                cli.isRoomEncrypted(this.props.roomId)) {
+            if (cli.isRoomEncrypted(this.props.roomId)) {
                 const room = cli.getRoom(this.props.roomId);
                 const visibilityEvent = room.currentState.getStateEvents(
                     "m.room.history_visibility", "",
@@ -1339,6 +1371,12 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             title = _t("Transfer");
             buttonText = _t("Transfer");
             goButtonFn = this._transferCall;
+            consultSection = <div>
+                <label>
+                    <input type="checkbox" checked={this.state.consultFirst} onChange={this.onConsultFirstChange} />
+                    {_t("Consult first")}
+                </label>
+            </div>;
         } else {
             console.error("Unknown kind of InviteDialog: " + this.props.kind);
         }
@@ -1375,6 +1413,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
                         {this._renderSection('recents')}
                         {this._renderSection('suggestions')}
                     </div>
+                    {consultSection}
                 </div>
             </BaseDialog>
         );

src/components/views/dialogs/SeshatResetDialog.tsx

@@ -0,0 +1,54 @@
+/*
+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 {_t} from "../../../languageHandler";
+import {replaceableComponent} from "../../../utils/replaceableComponent";
+
+import BaseDialog from "./BaseDialog";
+import DialogButtons from "../elements/DialogButtons";
+
+import {IDialogProps} from "./IDialogProps";
+
+@replaceableComponent("views.dialogs.SeshatResetDialog")
+export default class SeshatResetDialog extends React.PureComponent<IDialogProps> {
+    render() {
+        return (
+            <BaseDialog
+                hasCancel={true}
+                onFinished={this.props.onFinished.bind(null, false)}
+                title={_t("Reset event store?")}>
+                <div>
+                    <p>
+                        {_t("You most likely do not want to reset your event index store")}
+                        <br />
+                        {_t("If you do, please note that none of your messages will be deleted, " +
+                            "but the search experience might be degraded for a few moments" +
+                            "whilst the index is recreated",
+                        )}
+                    </p>
+                </div>
+                <DialogButtons
+                    primaryButton={_t("Reset event store")}
+                    onPrimaryButtonClick={this.props.onFinished.bind(null, true)}
+                    primaryButtonClass="danger"
+                    cancelButton={_t("Cancel")}
+                    onCancel={this.props.onFinished.bind(null, false)}
+                />
+            </BaseDialog>
+        );
+    }
+}

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

@@ -25,6 +25,8 @@ import Field from '../../elements/Field';
 import AccessibleButton from '../../elements/AccessibleButton';
 import {_t} from '../../../../languageHandler';
 import {IDialogProps} from "../IDialogProps";
+import {accessSecretStorage} from "../../../../SecurityManager";
+import Modal from "../../../../Modal";
 
 // Maximum acceptable size of a key file. It's 59 characters including the spaces we encode,
 // so this should be plenty and allow for people putting extra whitespace in the file because
@@ -47,6 +49,7 @@ interface IState {
     forceRecoveryKey: boolean;
     passPhrase: string;
     keyMatches: boolean | null;
+    resetting: boolean;
 }
 
 /*
@@ -66,10 +69,14 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
             forceRecoveryKey: false,
             passPhrase: '',
             keyMatches: null,
+            resetting: false,
         };
     }
 
     private onCancel = () => {
+        if (this.state.resetting) {
+            this.setState({resetting: false});
+        }
         this.props.onFinished(false);
     };
 
@@ -201,6 +208,55 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
         });
     };
 
+    private onResetAllClick = (ev: React.MouseEvent<HTMLAnchorElement>) => {
+        ev.preventDefault();
+        this.setState({resetting: true});
+    };
+
+    private onConfirmResetAllClick = async () => {
+        // Hide ourselves so the user can interact with the reset dialogs.
+        // We don't conclude the promise chain (onFinished) yet to avoid confusing
+        // any upstream code flows.
+        //
+        // Note: this will unmount us, so don't call `setState` or anything in the
+        // rest of this function.
+        Modal.toggleCurrentDialogVisibility();
+
+        try {
+            // Force reset secret storage (which resets the key backup)
+            await accessSecretStorage(async () => {
+                // Now reset cross-signing so everything Just Works™ again.
+                const cli = MatrixClientPeg.get();
+                await cli.bootstrapCrossSigning({
+                    authUploadDeviceSigningKeys: async (makeRequest) => {
+                        // XXX: Making this an import breaks the app.
+                        const InteractiveAuthDialog = sdk.getComponent("views.dialogs.InteractiveAuthDialog");
+                        const {finished} = Modal.createTrackedDialog(
+                            'Cross-signing keys dialog', '', InteractiveAuthDialog,
+                            {
+                                title: _t("Setting up keys"),
+                                matrixClient: cli,
+                                makeRequest,
+                            },
+                        );
+                        const [confirmed] = await finished;
+                        if (!confirmed) {
+                            throw new Error("Cross-signing key upload auth canceled");
+                        }
+                    },
+                    setupNewCrossSigning: true,
+                });
+
+                // Now we can indicate that the user is done pressing buttons, finally.
+                // Upstream flows will detect the new secret storage, key backup, etc and use it.
+                this.props.onFinished(true);
+            }, true);
+        } catch (e) {
+            console.error(e);
+            this.props.onFinished(false);
+        }
+    };
+
     private getKeyValidationText(): string {
         if (this.state.recoveryKeyFileError) {
             return _t("Wrong file type");
@@ -216,8 +272,9 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
     }
 
     render() {
-        // Caution: Making this an import will break tests.
+        // Caution: Making these an import will break tests.
         const BaseDialog = sdk.getComponent("views.dialogs.BaseDialog");
+        const DialogButtons = sdk.getComponent("views.elements.DialogButtons");
 
         const hasPassphrase = (
             this.props.keyInfo &&
@@ -226,11 +283,36 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
             this.props.keyInfo.passphrase.iterations
         );
 
+        const resetButton = (
+            <div className="mx_AccessSecretStorageDialog_reset">
+                {_t("Forgotten or lost all recovery methods? <a>Reset all</a>", null, {
+                    a: (sub) => <a
+                        href="" onClick={this.onResetAllClick}
+                        className="mx_AccessSecretStorageDialog_reset_link">{sub}</a>,
+                })}
+            </div>
+        );
+
         let content;
         let title;
         let titleClass;
-        if (hasPassphrase && !this.state.forceRecoveryKey) {
-            const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
+        if (this.state.resetting) {
+            title = _t("Reset everything");
+            titleClass = ['mx_AccessSecretStorageDialog_titleWithIcon mx_AccessSecretStorageDialog_resetBadge'];
+            content = <div>
+                <p>{_t("Only do this if you have no other device to complete verification with.")}</p>
+                <p>{_t("If you reset everything, you will restart with no trusted sessions, no trusted users, and "
+                    + "might not be able to see past messages.")}</p>
+                <DialogButtons
+                    primaryButton={_t('Reset')}
+                    onPrimaryButtonClick={this.onConfirmResetAllClick}
+                    hasCancel={true}
+                    onCancel={this.onCancel}
+                    focus={false}
+                    primaryButtonClass="danger"
+                />
+            </div>;
+        } else if (hasPassphrase && !this.state.forceRecoveryKey) {
             const AccessibleButton = sdk.getComponent('elements.AccessibleButton');
             title = _t("Security Phrase");
             titleClass = ['mx_AccessSecretStorageDialog_titleWithIcon mx_AccessSecretStorageDialog_securePhraseTitle'];
@@ -278,13 +360,13 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
                         onCancel={this.onCancel}
                         focus={false}
                         primaryDisabled={this.state.passPhrase.length === 0}
+                        additive={resetButton}
                     />
                 </form>
             </div>;
         } else {
             title = _t("Security Key");
             titleClass = ['mx_AccessSecretStorageDialog_titleWithIcon mx_AccessSecretStorageDialog_secureBackupTitle'];
-            const DialogButtons = sdk.getComponent('views.elements.DialogButtons');
 
             const feedbackClasses = classNames({
                 'mx_AccessSecretStorageDialog_recoveryKeyFeedback': true,
@@ -339,6 +421,7 @@ export default class AccessSecretStorageDialog extends React.PureComponent<IProp
                         onCancel={this.onCancel}
                         focus={false}
                         primaryDisabled={!this.state.recoveryKeyValid}
+                        additive={resetButton}
                     />
                 </form>
             </div>;

src/components/views/elements/EventTilePreview.tsx

@@ -19,7 +19,6 @@ import classnames from 'classnames';
 import { MatrixEvent } from 'matrix-js-sdk/src/models/event';
 
 import * as Avatar from '../../../Avatar';
-import { MatrixClientPeg } from '../../../MatrixClientPeg';
 import EventTile from '../rooms/EventTile';
 import SettingsStore from "../../../settings/SettingsStore";
 import {Layout} from "../../../settings/Layout";
@@ -41,15 +40,26 @@ interface IProps {
      * classnames to apply to the wrapper of the preview
      */
     className: string;
+
+    /**
+     * The ID of the displayed user
+     */
+    userId: string;
+
+    /**
+     * The display name of the displayed user
+     */
+    displayName?: string;
+
+    /**
+     * The mxc:// avatar URL of the displayed user
+     */
+    avatarUrl?: string;
 }
 
-/* eslint-disable camelcase */
 interface IState {
-    userId: string;
-    displayname: string;
-    avatar_url: string;
+    message: string;
 }
-/* eslint-enable camelcase */
 
 const AVATAR_SIZE = 32;
 
@@ -57,45 +67,28 @@ const AVATAR_SIZE = 32;
 export default class EventTilePreview extends React.Component<IProps, IState> {
     constructor(props: IProps) {
         super(props);
-
         this.state = {
-            userId: "@erim:fink.fink",
-            displayname: "Erimayas Fink",
-            avatar_url: null,
+            message: props.message,
         };
     }
 
-    async componentDidMount() {
-        // Fetch current user data
-        const client = MatrixClientPeg.get();
-        const userId = client.getUserId();
-        const profileInfo = await client.getProfileInfo(userId);
-        const avatarUrl = profileInfo.avatar_url;
-
-        this.setState({
-            userId,
-            displayname: profileInfo.displayname,
-            avatar_url: avatarUrl,
-        });
-    }
-
-    private fakeEvent({userId, displayname, avatar_url: avatarUrl}: IState) {
+    private fakeEvent({message}: IState) {
         // Fake it till we make it
         /* eslint-disable quote-props */
         const rawEvent = {
             type: "m.room.message",
-            sender: userId,
+            sender: this.props.userId,
             content: {
                 "m.new_content": {
                     msgtype: "m.text",
-                    body: this.props.message,
-                    displayname: displayname,
-                    avatar_url: avatarUrl,
+                    body: message,
+                    displayname: this.props.displayName,
+                    avatar_url: this.props.avatarUrl,
                 },
                 msgtype: "m.text",
-                body: this.props.message,
-                displayname: displayname,
-                avatar_url: avatarUrl,
+                body: message,
+                displayname: this.props.displayName,
+                avatar_url: this.props.avatarUrl,
             },
             unsigned: {
                 age: 97,
@@ -108,12 +101,15 @@ export default class EventTilePreview extends React.Component<IProps, IState> {
 
         // Fake it more
         event.sender = {
-            name: displayname,
-            userId: userId,
+            name: this.props.displayName,
+            userId: this.props.userId,
             getAvatarUrl: (..._) => {
-                return Avatar.avatarUrlForUser({avatarUrl}, AVATAR_SIZE, AVATAR_SIZE, "crop");
+                return Avatar.avatarUrlForUser(
+                    { avatarUrl: this.props.avatarUrl },
+                    AVATAR_SIZE, AVATAR_SIZE, "crop",
+                );
             },
-            getMxcAvatarUrl: () => avatarUrl,
+            getMxcAvatarUrl: () => this.props.avatarUrl,
         };
 
         return event;

src/components/views/elements/ImageView.js

@@ -1,235 +0,0 @@
-/*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
-
-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 PropTypes from 'prop-types';
-import {MatrixClientPeg} from "../../../MatrixClientPeg";
-import {formatDate} from '../../../DateUtils';
-import { _t } from '../../../languageHandler';
-import filesize from "filesize";
-import AccessibleButton from "./AccessibleButton";
-import Modal from "../../../Modal";
-import * as sdk from "../../../index";
-import {Key} from "../../../Keyboard";
-import FocusLock from "react-focus-lock";
-import {replaceableComponent} from "../../../utils/replaceableComponent";
-
-@replaceableComponent("views.elements.ImageView")
-export default class ImageView extends React.Component {
-    static propTypes = {
-        src: PropTypes.string.isRequired, // the source of the image being displayed
-        name: PropTypes.string, // the main title ('name') for the image
-        link: PropTypes.string, // the link (if any) applied to the name of the image
-        width: PropTypes.number, // width of the image src in pixels
-        height: PropTypes.number, // height of the image src in pixels
-        fileSize: PropTypes.number, // size of the image src in bytes
-        onFinished: PropTypes.func.isRequired, // callback when the lightbox is dismissed
-
-        // the event (if any) that the Image is displaying. Used for event-specific stuff like
-        // redactions, senders, timestamps etc.  Other descriptors are taken from the explicit
-        // properties above, which let us use lightboxes to display images which aren't associated
-        // with events.
-        mxEvent: PropTypes.object,
-    };
-
-    constructor(props) {
-        super(props);
-        this.state = { rotationDegrees: 0 };
-    }
-
-    onKeyDown = (ev) => {
-        if (ev.key === Key.ESCAPE) {
-            ev.stopPropagation();
-            ev.preventDefault();
-            this.props.onFinished();
-        }
-    };
-
-    onRedactClick = () => {
-        const ConfirmRedactDialog = sdk.getComponent("dialogs.ConfirmRedactDialog");
-        Modal.createTrackedDialog('Confirm Redact Dialog', 'Image View', ConfirmRedactDialog, {
-            onFinished: (proceed) => {
-                if (!proceed) return;
-                this.props.onFinished();
-                MatrixClientPeg.get().redactEvent(
-                    this.props.mxEvent.getRoomId(), this.props.mxEvent.getId(),
-                ).catch(function(e) {
-                    const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");
-                    // display error message stating you couldn't delete this.
-                    const code = e.errcode || e.statusCode;
-                    Modal.createTrackedDialog('You cannot delete this image.', '', ErrorDialog, {
-                        title: _t('Error'),
-                        description: _t('You cannot delete this image. (%(code)s)', {code: code}),
-                    });
-                });
-            },
-        });
-    };
-
-    getName() {
-        let name = this.props.name;
-        if (name && this.props.link) {
-            name = <a href={ this.props.link } target="_blank" rel="noreferrer noopener">{ name }</a>;
-        }
-        return name;
-    }
-
-    rotateCounterClockwise = () => {
-        const cur = this.state.rotationDegrees;
-        const rotationDegrees = (cur - 90) % 360;
-        this.setState({ rotationDegrees });
-    };
-
-    rotateClockwise = () => {
-        const cur = this.state.rotationDegrees;
-        const rotationDegrees = (cur + 90) % 360;
-        this.setState({ rotationDegrees });
-    };
-
-    render() {
-/*
-        // In theory max-width: 80%, max-height: 80% on the CSS should work
-        // but in practice, it doesn't, so do it manually:
-
-        var width = this.props.width || 500;
-        var height = this.props.height || 500;
-
-        var maxWidth = document.documentElement.clientWidth * 0.8;
-        var maxHeight = document.documentElement.clientHeight * 0.8;
-
-        var widthFrac = width / maxWidth;
-        var heightFrac = height / maxHeight;
-
-        var displayWidth;
-        var displayHeight;
-        if (widthFrac > heightFrac) {
-            displayWidth = Math.min(width, maxWidth);
-            displayHeight = (displayWidth / width) * height;
-        } else {
-            displayHeight = Math.min(height, maxHeight);
-            displayWidth = (displayHeight / height) * width;
-        }
-
-        var style = {
-            width: displayWidth,
-            height: displayHeight
-        };
-*/
-        let style = {};
-        let res;
-
-        if (this.props.width && this.props.height) {
-            style = {
-                width: this.props.width,
-                height: this.props.height,
-            };
-            res = style.width + "x" + style.height + "px";
-        }
-
-        let size;
-        if (this.props.fileSize) {
-            size = filesize(this.props.fileSize);
-        }
-
-        let sizeRes;
-        if (size && res) {
-            sizeRes = size + ", " + res;
-        } else {
-            sizeRes = size || res;
-        }
-
-        let mayRedact = false;
-        const showEventMeta = !!this.props.mxEvent;
-
-        let eventMeta;
-        if (showEventMeta) {
-            // Figure out the sender, defaulting to mxid
-            let sender = this.props.mxEvent.getSender();
-            const cli = MatrixClientPeg.get();
-            const room = cli.getRoom(this.props.mxEvent.getRoomId());
-            if (room) {
-                mayRedact = room.currentState.maySendRedactionForEvent(this.props.mxEvent, cli.credentials.userId);
-                const member = room.getMember(sender);
-                if (member) sender = member.name;
-            }
-
-            eventMeta = (<div className="mx_ImageView_metadata">
-                { _t('Uploaded on %(date)s by %(user)s', {
-                    date: formatDate(new Date(this.props.mxEvent.getTs())),
-                    user: sender,
-                }) }
-            </div>);
-        }
-
-        let eventRedact;
-        if (mayRedact) {
-            eventRedact = (<div className="mx_ImageView_button" onClick={this.onRedactClick}>
-                { _t('Remove') }
-            </div>);
-        }
-
-        const rotationDegrees = this.state.rotationDegrees;
-        const effectiveStyle = {transform: `rotate(${rotationDegrees}deg)`, ...style};
-
-        return (
-            <FocusLock
-                returnFocus={true}
-                lockProps={{
-                    onKeyDown: this.onKeyDown,
-                    role: "dialog",
-                }}
-                className="mx_ImageView"
-            >
-                <div className="mx_ImageView_lhs">
-                </div>
-                <div className="mx_ImageView_content">
-                    <img src={this.props.src} title={this.props.name} style={effectiveStyle} className="mainImage" />
-                    <div className="mx_ImageView_labelWrapper">
-                        <div className="mx_ImageView_label">
-                            <AccessibleButton className="mx_ImageView_rotateCounterClockwise" title={_t("Rotate Left")} onClick={ this.rotateCounterClockwise }>
-                                <img src={require("../../../../res/img/rotate-ccw.svg")} alt={ _t('Rotate counter-clockwise') } width="18" height="18" />
-                            </AccessibleButton>
-                            <AccessibleButton className="mx_ImageView_rotateClockwise" title={_t("Rotate Right")} onClick={ this.rotateClockwise }>
-                                <img src={require("../../../../res/img/rotate-cw.svg")} alt={ _t('Rotate clockwise') } width="18" height="18" />
-                            </AccessibleButton>
-                            <AccessibleButton className="mx_ImageView_cancel" title={_t("Close")} onClick={ this.props.onFinished }>
-                              <img src={require("../../../../res/img/cancel-white.svg")} width="18" height="18" alt={ _t('Close') } />
-                            </AccessibleButton>
-                            <div className="mx_ImageView_shim">
-                            </div>
-                            <div className="mx_ImageView_name">
-                                { this.getName() }
-                            </div>
-                            { eventMeta }
-                            <a className="mx_ImageView_link" href={ this.props.src } download={ this.props.name } target="_blank" rel="noopener">
-                                <div className="mx_ImageView_download">
-                                        { _t('Download this file') }<br />
-                                         <span className="mx_ImageView_size">{ sizeRes }</span>
-                                </div>
-                            </a>
-                            { eventRedact }
-                            <div className="mx_ImageView_shim">
-                            </div>
-                        </div>
-                    </div>
-                </div>
-                <div className="mx_ImageView_rhs">
-                </div>
-            </FocusLock>
-        );
-    }
-}

src/components/views/elements/ImageView.tsx

@@ -0,0 +1,439 @@
+/*
+Copyright 2015, 2016 OpenMarket Ltd
+Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
+Copyright 2020, 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+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, { createRef } from 'react';
+import { _t } from '../../../languageHandler';
+import AccessibleTooltipButton from "./AccessibleTooltipButton";
+import {Key} from "../../../Keyboard";
+import FocusLock from "react-focus-lock";
+import MemberAvatar from "../avatars/MemberAvatar";
+import {ContextMenuTooltipButton} from "../../../accessibility/context_menu/ContextMenuTooltipButton";
+import MessageContextMenu from "../context_menus/MessageContextMenu";
+import {aboveLeftOf, ContextMenu} from '../../structures/ContextMenu';
+import MessageTimestamp from "../messages/MessageTimestamp";
+import SettingsStore from "../../../settings/SettingsStore";
+import {formatFullDate} from "../../../DateUtils";
+import dis from '../../../dispatcher/dispatcher';
+import {replaceableComponent} from "../../../utils/replaceableComponent";
+import {RoomPermalinkCreator} from "../../../utils/permalinks/Permalinks"
+import {MatrixEvent} from "matrix-js-sdk/src/models/event";
+
+const MIN_ZOOM = 100;
+const MAX_ZOOM = 300;
+// This is used for the buttons
+const ZOOM_STEP = 10;
+// This is used for mouse wheel events
+const ZOOM_COEFFICIENT = 10;
+// If we have moved only this much we can zoom
+const ZOOM_DISTANCE = 10;
+
+
+interface IProps {
+    src: string, // the source of the image being displayed
+    name?: string, // the main title ('name') for the image
+    link?: string, // the link (if any) applied to the name of the image
+    width?: number, // width of the image src in pixels
+    height?: number, // height of the image src in pixels
+    fileSize?: number, // size of the image src in bytes
+    onFinished(): void, // callback when the lightbox is dismissed
+
+    // the event (if any) that the Image is displaying. Used for event-specific stuff like
+    // redactions, senders, timestamps etc.  Other descriptors are taken from the explicit
+    // properties above, which let us use lightboxes to display images which aren't associated
+    // with events.
+    mxEvent: MatrixEvent,
+    permalinkCreator: RoomPermalinkCreator,
+}
+
+interface IState {
+    rotation: number,
+    zoom: number,
+    translationX: number,
+    translationY: number,
+    moving: boolean,
+    contextMenuDisplayed: boolean,
+}
+
+@replaceableComponent("views.elements.ImageView")
+export default class ImageView extends React.Component<IProps, IState> {
+    constructor(props) {
+        super(props);
+        this.state = {
+            rotation: 0,
+            zoom: MIN_ZOOM,
+            translationX: 0,
+            translationY: 0,
+            moving: false,
+            contextMenuDisplayed: false,
+        };
+    }
+
+    // XXX: Refs to functional components
+    private contextMenuButton = createRef<any>();
+    private focusLock = createRef<any>();
+
+    private initX = 0;
+    private initY = 0;
+    private lastX = 0;
+    private lastY = 0;
+    private previousX = 0;
+    private previousY = 0;
+
+    componentDidMount() {
+        // We have to use addEventListener() because the listener
+        // needs to be passive in order to work with Chromium
+        this.focusLock.current.addEventListener('wheel', this.onWheel, { passive: false });
+    }
+
+    componentWillUnmount() {
+        this.focusLock.current.removeEventListener('wheel', this.onWheel);
+    }
+
+    private onKeyDown = (ev: KeyboardEvent) => {
+        if (ev.key === Key.ESCAPE) {
+            ev.stopPropagation();
+            ev.preventDefault();
+            this.props.onFinished();
+        }
+    };
+
+    private onWheel = (ev: WheelEvent) => {
+        ev.stopPropagation();
+        ev.preventDefault();
+        const newZoom = this.state.zoom - (ev.deltaY * ZOOM_COEFFICIENT);
+
+        if (newZoom <= MIN_ZOOM) {
+            this.setState({
+                zoom: MIN_ZOOM,
+                translationX: 0,
+                translationY: 0,
+            });
+            return;
+        }
+        if (newZoom >= MAX_ZOOM) {
+            this.setState({zoom: MAX_ZOOM});
+            return;
+        }
+
+        this.setState({
+            zoom: newZoom,
+        });
+    };
+
+    private onRotateCounterClockwiseClick = () => {
+        const cur = this.state.rotation;
+        const rotationDegrees = cur - 90;
+        this.setState({ rotation: rotationDegrees });
+    };
+
+    private onRotateClockwiseClick = () => {
+        const cur = this.state.rotation;
+        const rotationDegrees = cur + 90;
+        this.setState({ rotation: rotationDegrees });
+    };
+
+    private onZoomInClick = () => {
+        if (this.state.zoom >= MAX_ZOOM) {
+            this.setState({zoom: MAX_ZOOM});
+            return;
+        }
+
+        this.setState({
+            zoom: this.state.zoom + ZOOM_STEP,
+        });
+    };
+
+    private onZoomOutClick = () => {
+        if (this.state.zoom <= MIN_ZOOM) {
+            this.setState({
+                zoom: MIN_ZOOM,
+                translationX: 0,
+                translationY: 0,
+            });
+            return;
+        }
+        this.setState({
+            zoom: this.state.zoom - ZOOM_STEP,
+        });
+    };
+
+    private onDownloadClick = () => {
+        const a = document.createElement("a");
+        a.href = this.props.src;
+        a.download = this.props.name;
+        a.target = "_blank";
+        a.click();
+    };
+
+    private onOpenContextMenu = () => {
+        this.setState({
+            contextMenuDisplayed: true,
+        });
+    };
+
+    private onCloseContextMenu = () => {
+        this.setState({
+            contextMenuDisplayed: false,
+        });
+    };
+
+    private onPermalinkClicked = (ev: React.MouseEvent) => {
+        // This allows the permalink to be opened in a new tab/window or copied as
+        // matrix.to, but also for it to enable routing within Element when clicked.
+        ev.preventDefault();
+        dis.dispatch({
+            action: 'view_room',
+            event_id: this.props.mxEvent.getId(),
+            highlighted: true,
+            room_id: this.props.mxEvent.getRoomId(),
+        });
+        this.props.onFinished();
+    };
+
+    private onStartMoving = (ev: React.MouseEvent) => {
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        // Zoom in if we are completely zoomed out
+        if (this.state.zoom === MIN_ZOOM) {
+            this.setState({zoom: MAX_ZOOM});
+            return;
+        }
+
+        this.setState({moving: true});
+        this.previousX = this.state.translationX;
+        this.previousY = this.state.translationY;
+        this.initX = ev.pageX - this.lastX;
+        this.initY = ev.pageY - this.lastY;
+    };
+
+    private onMoving = (ev: React.MouseEvent) => {
+        ev.stopPropagation();
+        ev.preventDefault();
+
+        if (!this.state.moving) return;
+
+        this.lastX = ev.pageX - this.initX;
+        this.lastY = ev.pageY - this.initY;
+        this.setState({
+            translationX: this.lastX,
+            translationY: this.lastY,
+        });
+    };
+
+    private onEndMoving = () => {
+        // Zoom out if we haven't moved much
+        if (
+            this.state.moving === true &&
+            Math.abs(this.state.translationX - this.previousX) < ZOOM_DISTANCE &&
+            Math.abs(this.state.translationY - this.previousY) < ZOOM_DISTANCE
+        ) {
+            this.setState({
+                zoom: MIN_ZOOM,
+                translationX: 0,
+                translationY: 0,
+            });
+        }
+        this.setState({moving: false});
+    };
+
+    private renderContextMenu() {
+        let contextMenu = null;
+        if (this.state.contextMenuDisplayed) {
+            contextMenu = (
+                <ContextMenu
+                    {...aboveLeftOf(this.contextMenuButton.current.getBoundingClientRect())}
+                    onFinished={this.onCloseContextMenu}
+                >
+                    <MessageContextMenu
+                        mxEvent={this.props.mxEvent}
+                        permalinkCreator={this.props.permalinkCreator}
+                        onFinished={this.onCloseContextMenu}
+                        onCloseDialog={this.props.onFinished}
+                    />
+                </ContextMenu>
+            );
+        }
+
+        return (
+            <React.Fragment>
+                { contextMenu }
+            </React.Fragment>
+        );
+    }
+
+    render() {
+        const showEventMeta = !!this.props.mxEvent;
+
+        let cursor;
+        if (this.state.moving) {
+            cursor= "grabbing";
+        } else if (this.state.zoom === MIN_ZOOM) {
+            cursor = "zoom-in";
+        } else {
+            cursor = "zoom-out";
+        }
+        const rotationDegrees = this.state.rotation + "deg";
+        const zoomPercentage = this.state.zoom/100;
+        const translatePixelsX = this.state.translationX + "px";
+        const translatePixelsY = this.state.translationY + "px";
+        // The order of the values is important!
+        // First, we translate and only then we rotate, otherwise
+        // we would apply the translation to an already rotated
+        // image causing it translate in the wrong direction.
+        const style = {
+            cursor: cursor,
+            transition: this.state.moving ? null : "transform 200ms ease 0s",
+            transform: `translateX(${translatePixelsX})
+                        translateY(${translatePixelsY})
+                        scale(${zoomPercentage})
+                        rotate(${rotationDegrees})`,
+        };
+
+        let info;
+        if (showEventMeta) {
+            const mxEvent = this.props.mxEvent;
+            const showTwelveHour = SettingsStore.getValue("showTwelveHourTimestamps");
+            let permalink = "#";
+            if (this.props.permalinkCreator) {
+                permalink = this.props.permalinkCreator.forEvent(this.props.mxEvent.getId());
+            }
+
+            const senderName = mxEvent.sender ? mxEvent.sender.name : mxEvent.getSender();
+            const sender = (
+                <div className="mx_ImageView_info_sender">
+                    {senderName}
+                </div>
+            );
+            const messageTimestamp = (
+                <a
+                    href={permalink}
+                    onClick={this.onPermalinkClicked}
+                    aria-label={formatFullDate(new Date(this.props.mxEvent.getTs()), showTwelveHour, false)}
+                >
+                    <MessageTimestamp
+                        showFullDate={true}
+                        showTwelveHour={showTwelveHour}
+                        ts={mxEvent.getTs()}
+                        showSeconds={false}
+                    />
+                </a>
+            );
+            const avatar = (
+                <MemberAvatar
+                    member={mxEvent.sender}
+                    width={32} height={32}
+                    viewUserOnClick={true}
+                />
+            );
+
+            info = (
+                <div className="mx_ImageView_info_wrapper">
+                    {avatar}
+                    <div className="mx_ImageView_info">
+                        {sender}
+                        {messageTimestamp}
+                    </div>
+                </div>
+            );
+        } else {
+            // If there is no event - we're viewing an avatar, we set
+            // an empty div here, since the panel uses space-between
+            // and we want the same placement of elements
+            info = (
+                <div></div>
+            );
+        }
+
+        let contextMenuButton;
+        if (this.props.mxEvent) {
+            contextMenuButton = (
+                <ContextMenuTooltipButton
+                    className="mx_ImageView_button mx_ImageView_button_more"
+                    title={_t("Options")}
+                    onClick={this.onOpenContextMenu}
+                    inputRef={this.contextMenuButton}
+                    isExpanded={this.state.contextMenuDisplayed}
+                />
+            );
+        }
+
+        return (
+            <FocusLock
+                returnFocus={true}
+                lockProps={{
+                    onKeyDown: this.onKeyDown,
+                    role: "dialog",
+                }}
+                className="mx_ImageView"
+                ref={this.focusLock}
+            >
+                <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_zoomOut"
+                            title={_t("Zoom out")}
+                            onClick={ this.onZoomOutClick }>
+                        </AccessibleTooltipButton>
+                        <AccessibleTooltipButton
+                            className="mx_ImageView_button mx_ImageView_button_zoomIn"
+                            title={_t("Zoom in")}
+                            onClick={ this.onZoomInClick }>
+                        </AccessibleTooltipButton>
+                        <AccessibleTooltipButton
+                            className="mx_ImageView_button mx_ImageView_button_download"
+                            title={_t("Download")}
+                            onClick={ this.onDownloadClick }>
+                        </AccessibleTooltipButton>
+                        {contextMenuButton}
+                        <AccessibleTooltipButton
+                            className="mx_ImageView_button mx_ImageView_button_close"
+                            title={_t("Close")}
+                            onClick={ this.props.onFinished }>
+                        </AccessibleTooltipButton>
+                        {this.renderContextMenu()}
+                    </div>
+                </div>
+                <div className="mx_ImageView_image_wrapper">
+                    <img
+                        src={this.props.src}
+                        title={this.props.name}
+                        style={style}
+                        className="mx_ImageView_image"
+                        draggable={true}
+                        onMouseDown={this.onStartMoving}
+                        onMouseMove={this.onMoving}
+                        onMouseUp={this.onEndMoving}
+                        onMouseLeave={this.onEndMoving}
+                    />
+                </div>
+            </FocusLock>
+        );
+    }
+}

src/components/views/elements/InviteReason.tsx

@@ -0,0 +1,62 @@
+/*
+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 classNames from "classnames";
+import React from "react";
+import { _t } from "../../../languageHandler";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+
+interface IProps {
+    reason: string;
+}
+
+interface IState {
+    hidden: boolean;
+}
+
+@replaceableComponent("views.elements.InviteReason")
+export default class InviteReason extends React.PureComponent<IProps, IState> {
+    constructor(props) {
+        super(props);
+        this.state = {
+            // We hide the reason for invitation by default, since it can be a
+            // vector for spam/harassment.
+            hidden: true,
+        };
+    }
+
+    onViewClick = () => {
+        this.setState({
+            hidden: false,
+        });
+    }
+
+    render() {
+        const classes = classNames({
+            "mx_InviteReason": true,
+            "mx_InviteReason_hidden": this.state.hidden,
+        });
+
+        return <div className={classes}>
+            <div className="mx_InviteReason_reason">{this.props.reason}</div>
+            <div className="mx_InviteReason_view"
+                onClick={this.onViewClick}
+            >
+                {_t("View message")}
+            </div>
+        </div>;
+    }
+}

src/components/views/messages/MImageBody.js

@@ -41,6 +41,9 @@ export default class MImageBody extends React.Component {
 
         /* the maximum image height to use */
         maxImageHeight: PropTypes.number,
+
+        /* the permalinkCreator */
+        permalinkCreator: PropTypes.object,
     };
 
     static contextType = MatrixClientContext;
@@ -106,6 +109,7 @@ export default class MImageBody extends React.Component {
                 src: httpUrl,
                 name: content.body && content.body.length > 0 ? content.body : _t('Attachment'),
                 mxEvent: this.props.mxEvent,
+                permalinkCreator: this.props.permalinkCreator,
             };
 
             if (content.info) {
@@ -114,7 +118,7 @@ export default class MImageBody extends React.Component {
                 params.fileSize = content.info.size;
             }
 
-            Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
+            Modal.createDialog(ImageView, params, "mx_Dialog_lightbox", null, true);
         }
     }
 

src/components/views/messages/MVideoBody.tsx

@@ -132,7 +132,7 @@ export default class MVideoBody extends React.PureComponent<IProps, IState> {
                         // enable the play button. Firefox does not seem to care either
                         // way, so it's fine to do for all browsers.
                         decryptedUrl: `data:${content?.info?.mimetype},`,
-                        decryptedThumbnailUrl: thumbnailUrl,
+                        decryptedThumbnailUrl: thumbnailUrl || `data:${content?.info?.mimetype},`,
                         decryptedBlob: null,
                     });
                 }

src/components/views/messages/MessageEvent.js

@@ -46,6 +46,9 @@ export default class MessageEvent extends React.Component {
 
         /* the maximum image height to use, if the event is an image */
         maxImageHeight: PropTypes.number,
+
+        /* the permalinkCreator */
+        permalinkCreator: PropTypes.object,
     };
 
     constructor(props) {
@@ -126,6 +129,7 @@ export default class MessageEvent extends React.Component {
             editState={this.props.editState}
             onHeightChanged={this.props.onHeightChanged}
             onMessageAllowed={this.onTileUpdate}
+            permalinkCreator={this.props.permalinkCreator}
         />;
     }
 }

src/components/views/messages/MessageTimestamp.js

@@ -17,7 +17,7 @@ limitations under the License.
 
 import React from 'react';
 import PropTypes from 'prop-types';
-import {formatFullDate, formatTime} from '../../../DateUtils';
+import {formatFullDate, formatTime, formatFullTime} from '../../../DateUtils';
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 
 @replaceableComponent("views.messages.MessageTimestamp")
@@ -25,13 +25,24 @@ export default class MessageTimestamp extends React.Component {
     static propTypes = {
         ts: PropTypes.number.isRequired,
         showTwelveHour: PropTypes.bool,
+        showFullDate: PropTypes.bool,
+        showSeconds: PropTypes.bool,
     };
 
     render() {
         const date = new Date(this.props.ts);
+        let timestamp;
+        if (this.props.showFullDate) {
+            timestamp = formatFullDate(date, this.props.showTwelveHour, this.props.showSeconds);
+        } else if (this.props.showSeconds) {
+            timestamp = formatFullTime(date, this.props.showTwelveHour);
+        } else {
+            timestamp = formatTime(date, this.props.showTwelveHour);
+        }
+
         return (
             <span className="mx_MessageTimestamp" title={formatFullDate(date, this.props.showTwelveHour)} aria-hidden={true}>
-                { formatTime(date, this.props.showTwelveHour) }
+                {timestamp}
             </span>
         );
     }

src/components/views/messages/RoomAvatarEvent.js

@@ -49,7 +49,7 @@ export default class RoomAvatarEvent extends React.Component {
             src: httpUrl,
             name: text,
         };
-        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
+        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox", null, true);
     };
 
     render() {

src/components/views/right_panel/UserInfo.tsx

@@ -24,6 +24,7 @@ import {RoomMember} from 'matrix-js-sdk/src/models/room-member';
 import {User} from 'matrix-js-sdk/src/models/user';
 import {Room} from 'matrix-js-sdk/src/models/room';
 import {EventTimeline} from 'matrix-js-sdk/src/models/event-timeline';
+import {MatrixEvent} from 'matrix-js-sdk/src/models/event';
 
 import dis from '../../../dispatcher/dispatcher';
 import Modal from '../../../Modal';
@@ -496,11 +497,11 @@ const isMuted = (member: RoomMember, powerLevelContent: IPowerLevelsContent) =>
 export const useRoomPowerLevels = (cli: MatrixClient, room: Room) => {
     const [powerLevels, setPowerLevels] = useState<IPowerLevelsContent>({});
 
-    const update = useCallback(() => {
-        if (!room) {
-            return;
-        }
-        const event = room.currentState.getStateEvents("m.room.power_levels", "");
+    const update = useCallback((ev?: MatrixEvent) => {
+        if (!room) return;
+        if (ev && ev.getType() !== EventType.RoomPowerLevels) return;
+
+        const event = room.currentState.getStateEvents(EventType.RoomPowerLevels, "");
         if (event) {
             setPowerLevels(event.getContent());
         } else {
@@ -511,7 +512,7 @@ export const useRoomPowerLevels = (cli: MatrixClient, room: Room) => {
         };
     }, [room]);
 
-    useEventEmitter(cli, "RoomState.members", update);
+    useEventEmitter(cli, "RoomState.events", update);
     useEffect(() => {
         update();
         return () => {
@@ -1431,7 +1432,7 @@ const UserInfoHeader: React.FC<{
             name: member.name,
         };
 
-        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
+        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox", null, true);
     }, [member]);
 
     const avatarElement = (
@@ -1494,7 +1495,7 @@ const UserInfoHeader: React.FC<{
         e2eIcon = <E2EIcon size={18} status={e2eStatus} isUser={true} />;
     }
 
-    const displayName = member.name || member.displayname;
+    const displayName = member.rawDisplayName || member.displayname;
     return <React.Fragment>
         { avatarElement }
 

src/components/views/rooms/AuxPanel.tsx

@@ -149,8 +149,8 @@ export default class AuxPanel extends React.Component<IProps, IState> {
         const callView = (
             <CallViewForRoom
                 roomId={this.props.room.roomId}
-                onResize={this.props.onResize}
                 maxVideoHeight={this.props.maxHeight}
+                resizeNotifier={this.props.resizeNotifier}
             />
         );
 

src/components/views/rooms/BasicMessageComposer.tsx

@@ -140,7 +140,12 @@ export default class BasicMessageEditor extends React.Component<IProps, IState>
     }
 
     public componentDidUpdate(prevProps: IProps) {
-        if (this.props.placeholder !== prevProps.placeholder && this.props.placeholder) {
+        // We need to re-check the placeholder when the enabled state changes because it causes the
+        // placeholder element to remount, which gets rid of the `::before` class. Re-evaluating the
+        // placeholder means we get a proper `::before` with the placeholder.
+        const enabledChange = this.props.disabled !== prevProps.disabled;
+        const placeholderChanged = this.props.placeholder !== prevProps.placeholder;
+        if (this.props.placeholder && (placeholderChanged || enabledChange)) {
             const {isEmpty} = this.props.model;
             if (isEmpty) {
                 this.showPlaceholder();
@@ -670,8 +675,6 @@ export default class BasicMessageEditor extends React.Component<IProps, IState>
         });
         const classes = classNames("mx_BasicMessageComposer_input", {
             "mx_BasicMessageComposer_input_shouldShowPillAvatar": this.state.showPillAvatar,
-
-            // TODO: @@ TravisR: This doesn't work properly. The composer resets in a strange way.
             "mx_BasicMessageComposer_input_disabled": this.props.disabled,
         });
 

src/components/views/rooms/EventTile.js

@@ -1,8 +1,6 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017 New Vector Ltd
 Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
-Copyright 2019, 2020 The Matrix.org Foundation C.I.C.
+Copyright 2019 - 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -17,18 +15,19 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import ReplyThread from "../elements/ReplyThread";
 import React, {createRef} from 'react';
 import PropTypes from 'prop-types';
 import classNames from "classnames";
 import {EventType} from "matrix-js-sdk/src/@types/event";
+import {EventStatus} from 'matrix-js-sdk/src/models/event';
+
+import ReplyThread from "../elements/ReplyThread";
 import { _t } from '../../../languageHandler';
 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 {EventStatus} from 'matrix-js-sdk/src/models/event';
 import {formatTime} from "../../../DateUtils";
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import {ALL_RULE_TYPES} from "../../../mjolnir/BanList";
@@ -43,39 +42,56 @@ import {replaceableComponent} from "../../../utils/replaceableComponent";
 import Tooltip from "../elements/Tooltip";
 
 const eventTileTypes = {
-    'm.room.message': 'messages.MessageEvent',
-    'm.sticker': 'messages.MessageEvent',
-    'm.key.verification.cancel': 'messages.MKeyVerificationConclusion',
-    'm.key.verification.done': 'messages.MKeyVerificationConclusion',
-    'm.room.encryption': 'messages.EncryptionEvent',
-    'm.call.invite': 'messages.TextualEvent',
-    'm.call.answer': 'messages.TextualEvent',
-    'm.call.hangup': 'messages.TextualEvent',
-    'm.call.reject': 'messages.TextualEvent',
+    [EventType.RoomMessage]: 'messages.MessageEvent',
+    [EventType.Sticker]: 'messages.MessageEvent',
+    [EventType.KeyVerificationCancel]: 'messages.MKeyVerificationConclusion',
+    [EventType.KeyVerificationDone]: 'messages.MKeyVerificationConclusion',
+    [EventType.CallInvite]: 'messages.TextualEvent',
+    [EventType.CallAnswer]: 'messages.TextualEvent',
+    [EventType.CallHangup]: 'messages.TextualEvent',
+    [EventType.CallReject]: 'messages.TextualEvent',
 };
 
 const stateEventTileTypes = {
-    'm.room.encryption': 'messages.EncryptionEvent',
-    'm.room.canonical_alias': 'messages.TextualEvent',
-    'm.room.create': 'messages.RoomCreate',
-    'm.room.member': 'messages.TextualEvent',
-    'm.room.name': 'messages.TextualEvent',
-    'm.room.avatar': 'messages.RoomAvatarEvent',
-    'm.room.third_party_invite': 'messages.TextualEvent',
-    'm.room.history_visibility': 'messages.TextualEvent',
-    'm.room.topic': 'messages.TextualEvent',
-    'm.room.power_levels': 'messages.TextualEvent',
-    'm.room.pinned_events': 'messages.TextualEvent',
-    'm.room.server_acl': 'messages.TextualEvent',
+    [EventType.RoomEncryption]: 'messages.EncryptionEvent',
+    [EventType.RoomCanonicalAlias]: 'messages.TextualEvent',
+    [EventType.RoomCreate]: 'messages.RoomCreate',
+    [EventType.RoomMember]: 'messages.TextualEvent',
+    [EventType.RoomName]: 'messages.TextualEvent',
+    [EventType.RoomAvatar]: 'messages.RoomAvatarEvent',
+    [EventType.RoomThirdPartyInvite]: 'messages.TextualEvent',
+    [EventType.RoomHistoryVisibility]: 'messages.TextualEvent',
+    [EventType.RoomTopic]: 'messages.TextualEvent',
+    [EventType.RoomPowerLevels]: 'messages.TextualEvent',
+    [EventType.RoomPinnedEvents]: 'messages.TextualEvent',
+    [EventType.RoomServerAcl]: 'messages.TextualEvent',
     // TODO: Enable support for m.widget event type (https://github.com/vector-im/element-web/issues/13111)
     'im.vector.modular.widgets': 'messages.TextualEvent',
     [WIDGET_LAYOUT_EVENT_TYPE]: 'messages.TextualEvent',
-    'm.room.tombstone': 'messages.TextualEvent',
-    'm.room.join_rules': 'messages.TextualEvent',
-    'm.room.guest_access': 'messages.TextualEvent',
-    'm.room.related_groups': 'messages.TextualEvent',
+    [EventType.RoomTombstone]: 'messages.TextualEvent',
+    [EventType.RoomJoinRules]: 'messages.TextualEvent',
+    [EventType.RoomGuestAccess]: 'messages.TextualEvent',
+    'm.room.related_groups': 'messages.TextualEvent', // legacy communities flair
 };
 
+const stateEventSingular = new Set([
+    EventType.RoomEncryption,
+    EventType.RoomCanonicalAlias,
+    EventType.RoomCreate,
+    EventType.RoomName,
+    EventType.RoomAvatar,
+    EventType.RoomHistoryVisibility,
+    EventType.RoomTopic,
+    EventType.RoomPowerLevels,
+    EventType.RoomPinnedEvents,
+    EventType.RoomServerAcl,
+    WIDGET_LAYOUT_EVENT_TYPE,
+    EventType.RoomTombstone,
+    EventType.RoomJoinRules,
+    EventType.RoomGuestAccess,
+    'm.room.related_groups',
+]);
+
 // Add all the Mjolnir stuff to the renderer
 for (const evType of ALL_RULE_TYPES) {
     stateEventTileTypes[evType] = 'messages.TextualEvent';
@@ -132,7 +148,12 @@ export function getHandlerTile(ev) {
         }
     }
 
-    return ev.isState() ? stateEventTileTypes[type] : eventTileTypes[type];
+    if (ev.isState()) {
+        if (stateEventSingular.has(type) && ev.getStateKey() !== "") return undefined;
+        return stateEventTileTypes[type];
+    }
+
+    return eventTileTypes[type];
 }
 
 const MAX_READ_AVATARS = 5;
@@ -239,6 +260,9 @@ export default class EventTile extends React.Component {
 
         // whether or not to show flair at all
         enableFlair: PropTypes.bool,
+
+        // whether or not to show read receipts
+        showReadReceipts: PropTypes.bool,
     };
 
     static defaultProps = {
@@ -837,8 +861,6 @@ export default class EventTile extends React.Component {
             permalink = this.props.permalinkCreator.forEvent(this.props.mxEvent.getId());
         }
 
-        const readAvatars = this.getReadAvatars();
-
         let avatar;
         let sender;
         let avatarSize;
@@ -967,6 +989,16 @@ export default class EventTile extends React.Component {
         const groupPadlock = !useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
         const ircPadlock = useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
 
+        let msgOption;
+        if (this.props.showReadReceipts) {
+            const readAvatars = this.getReadAvatars();
+            msgOption = (
+                <div className="mx_EventTile_msgOption">
+                    { readAvatars }
+                </div>
+            );
+        }
+
         switch (this.props.tileShape) {
             case 'notif': {
                 const room = this.context.getRoom(this.props.mxEvent.getRoomId());
@@ -1080,14 +1112,13 @@ export default class EventTile extends React.Component {
                                            highlights={this.props.highlights}
                                            highlightLink={this.props.highlightLink}
                                            showUrlPreview={this.props.showUrlPreview}
+                                           permalinkCreator={this.props.permalinkCreator}
                                            onHeightChanged={this.props.onHeightChanged} />
                             { keyRequestInfo }
                             { reactionsRow }
                             { actionBar }
                         </div>
-                        <div className="mx_EventTile_msgOption">
-                            { readAvatars }
-                        </div>
+                        {msgOption}
                         {
                             // The avatar goes after the event tile as it's absolutely positioned to be over the
                             // event tile line, so needs to be later in the DOM so it appears on top (this avoids

src/components/views/rooms/LinkPreviewWidget.js

@@ -96,7 +96,7 @@ export default class LinkPreviewWidget extends React.Component {
             link: this.props.link,
         };
 
-        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox");
+        Modal.createDialog(ImageView, params, "mx_Dialog_lightbox", null, true);
     };
 
     render() {

src/components/views/rooms/MessageComposer.js

@@ -29,11 +29,10 @@ import {aboveLeftOf, ContextMenu, ContextMenuTooltipButton, useContextMenu} from
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import ReplyPreview from "./ReplyPreview";
 import {UIFeature} from "../../../settings/UIFeature";
-import WidgetStore from "../../../stores/WidgetStore";
 import {UPDATE_EVENT} from "../../../stores/AsyncStore";
-import ActiveWidgetStore from "../../../stores/ActiveWidgetStore";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import VoiceRecordComposerTile from "./VoiceRecordComposerTile";
+import {VoiceRecordingStore} from "../../../stores/VoiceRecordingStore";
 
 function ComposerAvatar(props) {
     const MemberStatusMessageAvatar = sdk.getComponent('avatars.MemberStatusMessageAvatar');
@@ -178,15 +177,12 @@ export default class MessageComposer extends React.Component {
         this._onRoomStateEvents = this._onRoomStateEvents.bind(this);
         this._onTombstoneClick = this._onTombstoneClick.bind(this);
         this.renderPlaceholderText = this.renderPlaceholderText.bind(this);
-        WidgetStore.instance.on(UPDATE_EVENT, this._onWidgetUpdate);
-        ActiveWidgetStore.on('update', this._onActiveWidgetUpdate);
+        VoiceRecordingStore.instance.on(UPDATE_EVENT, this._onVoiceStoreUpdate);
         this._dispatcherRef = null;
 
         this.state = {
             tombstone: this._getRoomTombstone(),
             canSendMessages: this.props.room.maySendMessage(),
-            hasConference: WidgetStore.instance.doesRoomHaveConference(this.props.room),
-            joinedConference: WidgetStore.instance.isJoinedToConferenceIn(this.props.room),
             isComposerEmpty: true,
             haveRecording: false,
         };
@@ -204,14 +200,6 @@ export default class MessageComposer extends React.Component {
         }
     };
 
-    _onWidgetUpdate = () => {
-        this.setState({hasConference: WidgetStore.instance.doesRoomHaveConference(this.props.room)});
-    };
-
-    _onActiveWidgetUpdate = () => {
-        this.setState({joinedConference: WidgetStore.instance.isJoinedToConferenceIn(this.props.room)});
-    };
-
     componentDidMount() {
         this.dispatcherRef = dis.register(this.onAction);
         MatrixClientPeg.get().on("RoomState.events", this._onRoomStateEvents);
@@ -238,8 +226,7 @@ export default class MessageComposer extends React.Component {
         if (MatrixClientPeg.get()) {
             MatrixClientPeg.get().removeListener("RoomState.events", this._onRoomStateEvents);
         }
-        WidgetStore.instance.removeListener(UPDATE_EVENT, this._onWidgetUpdate);
-        ActiveWidgetStore.removeListener('update', this._onActiveWidgetUpdate);
+        VoiceRecordingStore.instance.off(UPDATE_EVENT, this._onVoiceStoreUpdate);
         dis.unregister(this.dispatcherRef);
     }
 
@@ -327,8 +314,8 @@ export default class MessageComposer extends React.Component {
         });
     }
 
-    onVoiceUpdate = (haveRecording: boolean) => {
-        this.setState({haveRecording});
+    _onVoiceStoreUpdate = () => {
+        this.setState({haveRecording: !!VoiceRecordingStore.instance.activeRecording});
     };
 
     render() {
@@ -352,7 +339,6 @@ export default class MessageComposer extends React.Component {
                     permalinkCreator={this.props.permalinkCreator}
                     replyToEvent={this.props.replyToEvent}
                     onChange={this.onChange}
-                    // TODO: @@ TravisR - Disabling the composer doesn't work
                     disabled={this.state.haveRecording}
                 />,
             );
@@ -373,8 +359,7 @@ export default class MessageComposer extends React.Component {
             if (SettingsStore.getValue("feature_voice_messages")) {
                 controls.push(<VoiceRecordComposerTile
                     key="controls_voice_record"
-                    room={this.props.room}
-                    onRecording={this.onVoiceUpdate} />);
+                    room={this.props.room} />);
             }
 
             if (!this.state.isComposerEmpty || this.state.haveRecording) {

src/components/views/rooms/ReadReceiptMarker.js

@@ -17,22 +17,13 @@ limitations under the License.
 
 import React, {createRef} from 'react';
 import PropTypes from 'prop-types';
-import '../../../VelocityBounce';
 import { _t } from '../../../languageHandler';
 import {formatDate} from '../../../DateUtils';
-import Velociraptor from "../../../Velociraptor";
+import NodeAnimator from "../../../NodeAnimator";
 import * as sdk from "../../../index";
 import {toPx} from "../../../utils/units";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 
-let bounce = false;
-try {
-    if (global.localStorage) {
-        bounce = global.localStorage.getItem('avatar_bounce') == 'true';
-    }
-} catch (e) {
-}
-
 @replaceableComponent("views.rooms.ReadReceiptMarker")
 export default class ReadReceiptMarker extends React.PureComponent {
     static propTypes = {
@@ -115,7 +106,18 @@ export default class ReadReceiptMarker extends React.PureComponent {
             // we've already done our display - nothing more to do.
             return;
         }
+        this._animateMarker();
+    }
 
+    componentDidUpdate(prevProps) {
+        const differentLeftOffset = prevProps.leftOffset !== this.props.leftOffset;
+        const visibilityChanged = prevProps.hidden !== this.props.hidden;
+        if (differentLeftOffset || visibilityChanged) {
+            this._animateMarker();
+        }
+    }
+
+    _animateMarker() {
         // treat new RRs as though they were off the top of the screen
         let oldTop = -15;
 
@@ -139,42 +141,18 @@ export default class ReadReceiptMarker extends React.PureComponent {
         }
 
         const startStyles = [];
-        const enterTransitionOpts = [];
 
         if (oldInfo && oldInfo.left) {
             // start at the old height and in the old h pos
-
             startStyles.push({ top: startTopOffset+"px",
                                left: toPx(oldInfo.left) });
-
-            const reorderTransitionOpts = {
-                duration: 100,
-                easing: 'easeOut',
-            };
-
-            enterTransitionOpts.push(reorderTransitionOpts);
         }
 
-        // then shift to the rightmost column,
-        // and then it will drop down to its resting position
-        //
-        // XXX: We use a small left value to trick velocity-animate into actually animating.
-        // This is a very annoying bug where if it thinks there's no change to `left` then it'll
-        // skip applying it, thus making our read receipt at +14px instead of +0px like it
-        // should be. This does cause a tiny amount of drift for read receipts, however with a
-        // value so small it's not perceived by a user.
-        // Note: Any smaller values (or trying to interchange units) might cause read receipts to
-        // fail to fall down or cause gaps.
-        startStyles.push({ top: startTopOffset+'px', left: '1px' });
-        enterTransitionOpts.push({
-            duration: bounce ? Math.min(Math.log(Math.abs(startTopOffset)) * 200, 3000) : 300,
-            easing: bounce ? 'easeOutBounce' : 'easeOutCubic',
-        });
+        startStyles.push({ top: startTopOffset+'px', left: '0' });
 
         this.setState({
             suppressDisplay: false,
             startStyles: startStyles,
-            enterTransitionOpts: enterTransitionOpts,
         });
     }
 
@@ -187,7 +165,6 @@ export default class ReadReceiptMarker extends React.PureComponent {
         const style = {
             left: toPx(this.props.leftOffset),
             top: '0px',
-            visibility: this.props.hidden ? 'hidden' : 'visible',
         };
 
         let title;
@@ -210,9 +187,8 @@ export default class ReadReceiptMarker extends React.PureComponent {
         }
 
         return (
-            <Velociraptor
-                    startStyles={this.state.startStyles}
-                    enterTransitionOpts={this.state.enterTransitionOpts} >
+            <NodeAnimator
+                    startStyles={this.state.startStyles} >
                 <MemberAvatar
                     member={this.props.member}
                     fallbackUserId={this.props.fallbackUserId}
@@ -223,7 +199,7 @@ export default class ReadReceiptMarker extends React.PureComponent {
                     onClick={this.props.onClick}
                     inputRef={this._avatar}
                 />
-            </Velociraptor>
+            </NodeAnimator>
         );
     }
 }

src/components/views/rooms/RoomPreviewBar.js

@@ -1,7 +1,5 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017 Vector Creations Ltd
-Copyright 2019, 2020 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.
@@ -27,7 +25,8 @@ import SdkConfig from "../../../SdkConfig";
 import IdentityAuthClient from '../../../IdentityAuthClient';
 import {CommunityPrototypeStore} from "../../../stores/CommunityPrototypeStore";
 import {UPDATE_EVENT} from "../../../stores/AsyncStore";
-import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+import InviteReason from "../elements/InviteReason";
 
 const MessageCase = Object.freeze({
     NotLoggedIn: "NotLoggedIn",
@@ -306,6 +305,7 @@ export default class RoomPreviewBar extends React.Component {
         let showSpinner = false;
         let title;
         let subTitle;
+        let reasonElement;
         let primaryActionHandler;
         let primaryActionLabel;
         let secondaryActionHandler;
@@ -491,6 +491,12 @@ export default class RoomPreviewBar extends React.Component {
                     primaryActionLabel = _t("Accept");
                 }
 
+                const myUserId = MatrixClientPeg.get().getUserId();
+                const reason = this.props.room.currentState.getMember(myUserId).events.member.event.content.reason;
+                if (reason) {
+                    reasonElement = <InviteReason reason={reason} />;
+                }
+
                 primaryActionHandler = this.props.onJoinClick;
                 secondaryActionLabel = _t("Reject");
                 secondaryActionHandler = this.props.onRejectClick;
@@ -582,6 +588,7 @@ export default class RoomPreviewBar extends React.Component {
                     { titleElement }
                     { subTitleElements }
                 </div>
+                { reasonElement }
                 <div className="mx_RoomPreviewBar_actions">
                     { secondaryButton }
                     { extraComponents }

src/components/views/rooms/RoomTile.tsx

@@ -563,7 +563,11 @@ export default class RoomTile extends React.PureComponent<IProps, IState> {
         let messagePreview = null;
         if (this.showMessagePreview && this.state.messagePreview) {
             messagePreview = (
-                <div className="mx_RoomTile_messagePreview" id={messagePreviewId(this.props.room.roomId)}>
+                <div
+                    className="mx_RoomTile_messagePreview"
+                    id={messagePreviewId(this.props.room.roomId)}
+                    title={this.state.messagePreview}
+                >
                     {this.state.messagePreview}
                 </div>
             );

src/components/views/rooms/SendMessageComposer.js

@@ -477,6 +477,10 @@ export default class SendMessageComposer extends React.Component {
     }
 
     onAction = (payload) => {
+        // don't let the user into the composer if it is disabled - all of these branches lead
+        // to the cursor being in the composer
+        if (this.props.disabled) return;
+
         switch (payload.action) {
             case 'reply_to_event':
             case Action.FocusComposer:

src/components/views/rooms/VoiceRecordComposerTile.tsx

@@ -17,21 +17,21 @@ limitations under the License.
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import {_t} from "../../../languageHandler";
 import React from "react";
-import {VoiceRecorder} from "../../../voice/VoiceRecorder";
+import {VoiceRecording} from "../../../voice/VoiceRecording";
 import {Room} from "matrix-js-sdk/src/models/room";
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import classNames from "classnames";
 import LiveRecordingWaveform from "../voice_messages/LiveRecordingWaveform";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import LiveRecordingClock from "../voice_messages/LiveRecordingClock";
+import {VoiceRecordingStore} from "../../../stores/VoiceRecordingStore";
 
 interface IProps {
     room: Room;
-    onRecording: (haveRecording: boolean) => void;
 }
 
 interface IState {
-    recorder?: VoiceRecorder;
+    recorder?: VoiceRecording;
 }
 
 /**
@@ -57,13 +57,12 @@ export default class VoiceRecordComposerTile extends React.PureComponent<IProps,
                 msgtype: "org.matrix.msc2516.voice",
                 url: mxc,
             });
+            await VoiceRecordingStore.instance.disposeRecording();
             this.setState({recorder: null});
-            this.props.onRecording(false);
             return;
         }
-        const recorder = new VoiceRecorder(MatrixClientPeg.get());
+        const recorder = VoiceRecordingStore.instance.startRecording();
         await recorder.start();
-        this.props.onRecording(true);
         this.setState({recorder});
     };
 

src/components/views/settings/ChangePassword.js

@@ -28,13 +28,12 @@ import Modal from "../../../Modal";
 import PassphraseField from "../auth/PassphraseField";
 import CountlyAnalytics from "../../../CountlyAnalytics";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import { PASSWORD_MIN_SCORE } from '../auth/RegistrationForm';
 
 const FIELD_OLD_PASSWORD = 'field_old_password';
 const FIELD_NEW_PASSWORD = 'field_new_password';
 const FIELD_NEW_PASSWORD_CONFIRM = 'field_new_password_confirm';
 
-const PASSWORD_MIN_SCORE = 3; // safely unguessable: moderate protection from offline slow-hash scenario.
-
 @replaceableComponent("views.settings.ChangePassword")
 export default class ChangePassword extends React.Component {
     static propTypes = {

src/components/views/settings/EventIndexPanel.js

@@ -26,6 +26,7 @@ import {formatBytes, formatCountLong} from "../../../utils/FormattingUtils";
 import EventIndexPeg from "../../../indexing/EventIndexPeg";
 import {SettingLevel} from "../../../settings/SettingLevel";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
+import SeshatResetDialog from '../dialogs/SeshatResetDialog';
 
 @replaceableComponent("views.settings.EventIndexPanel")
 export default class EventIndexPanel extends React.Component {
@@ -122,6 +123,20 @@ export default class EventIndexPanel extends React.Component {
         await this.updateState();
     }
 
+    _confirmEventStoreReset = () => {
+        const self = this;
+        const { close } = Modal.createDialog(SeshatResetDialog, {
+            onFinished: async (success) => {
+                if (success) {
+                    await SettingsStore.setValue('enableEventIndexing', null, SettingLevel.DEVICE, false);
+                    await EventIndexPeg.deleteEventIndex();
+                    await self._onEnable();
+                    close();
+                }
+            },
+        });
+    }
+
     render() {
         let eventIndexingSettings = null;
         const InlineSpinner = sdk.getComponent('elements.InlineSpinner');
@@ -212,7 +227,10 @@ export default class EventIndexPanel extends React.Component {
             eventIndexingSettings = (
                 <div className='mx_SettingsTab_subsectionText'>
                     <p>
-                        {_t("Message search initialisation failed")}
+                        {this.state.enabling
+                            ? <InlineSpinner />
+                            : _t("Message search initilisation failed")
+                        }
                     </p>
                     {EventIndexPeg.error && (
                     <details>
@@ -220,6 +238,11 @@ export default class EventIndexPanel extends React.Component {
                         <code>
                             {EventIndexPeg.error.message}
                         </code>
+                        <p>
+                            <AccessibleButton key="delete" kind="danger" onClick={this._confirmEventStoreReset}>
+                                {_t("Reset")}
+                            </AccessibleButton>
+                        </p>
                     </details>
                     )}
 

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

@@ -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.
@@ -22,17 +22,19 @@ import * as sdk from "../../../../..";
 import AccessibleButton from "../../../elements/AccessibleButton";
 import Modal from "../../../../../Modal";
 import {replaceableComponent} from "../../../../../utils/replaceableComponent";
+import {EventType} from "matrix-js-sdk/src/@types/event";
 
 const plEventsToLabels = {
     // These will be translated for us later.
-    "m.room.avatar": _td("Change room avatar"),
-    "m.room.name": _td("Change room name"),
-    "m.room.canonical_alias": _td("Change main address for the room"),
-    "m.room.history_visibility": _td("Change history visibility"),
-    "m.room.power_levels": _td("Change permissions"),
-    "m.room.topic": _td("Change topic"),
-    "m.room.tombstone": _td("Upgrade the room"),
-    "m.room.encryption": _td("Enable room encryption"),
+    [EventType.RoomAvatar]: _td("Change room avatar"),
+    [EventType.RoomName]: _td("Change room name"),
+    [EventType.RoomCanonicalAlias]: _td("Change main address for the room"),
+    [EventType.RoomHistoryVisibility]: _td("Change history visibility"),
+    [EventType.RoomPowerLevels]: _td("Change permissions"),
+    [EventType.RoomTopic]: _td("Change topic"),
+    [EventType.RoomTombstone]: _td("Upgrade the room"),
+    [EventType.RoomEncryption]: _td("Enable room encryption"),
+    [EventType.RoomServerAcl]: _td("Change server ACLs"),
 
     // TODO: Enable support for m.widget event type (https://github.com/vector-im/element-web/issues/13111)
     "im.vector.modular.widgets": _td("Modify widgets"),
@@ -40,14 +42,15 @@ const plEventsToLabels = {
 
 const plEventsToShow = {
     // If an event is listed here, it will be shown in the PL settings. Defaults will be calculated.
-    "m.room.avatar": {isState: true},
-    "m.room.name": {isState: true},
-    "m.room.canonical_alias": {isState: true},
-    "m.room.history_visibility": {isState: true},
-    "m.room.power_levels": {isState: true},
-    "m.room.topic": {isState: true},
-    "m.room.tombstone": {isState: true},
-    "m.room.encryption": {isState: true},
+    [EventType.RoomAvatar]: {isState: true},
+    [EventType.RoomName]: {isState: true},
+    [EventType.RoomCanonicalAlias]: {isState: true},
+    [EventType.RoomHistoryVisibility]: {isState: true},
+    [EventType.RoomPowerLevels]: {isState: true},
+    [EventType.RoomTopic]: {isState: true},
+    [EventType.RoomTombstone]: {isState: true},
+    [EventType.RoomEncryption]: {isState: true},
+    [EventType.RoomServerAcl]: {isState: true},
 
     // TODO: Enable support for m.widget event type (https://github.com/vector-im/element-web/issues/13111)
     "im.vector.modular.widgets": {isState: true},

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

@@ -18,6 +18,7 @@ limitations under the License.
 import React from 'react';
 import {_t} from "../../../../../languageHandler";
 import SdkConfig from "../../../../../SdkConfig";
+import { MatrixClientPeg } from '../../../../../MatrixClientPeg';
 import SettingsStore from "../../../../../settings/SettingsStore";
 import { enumerateThemes } from "../../../../../theme";
 import ThemeWatcher from "../../../../../settings/watchers/ThemeWatcher";
@@ -63,6 +64,10 @@ interface IState extends IThemeState {
     systemFont: string;
     showAdvanced: boolean;
     layout: Layout;
+    // User profile data for the message preview
+    userId: string;
+    displayName: string;
+    avatarUrl: string;
 }
 
 @replaceableComponent("views.settings.tabs.user.AppearanceUserSettingsTab")
@@ -84,9 +89,25 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
             systemFont: SettingsStore.getValue("systemFont"),
             showAdvanced: false,
             layout: SettingsStore.getValue("layout"),
+            userId: "@erim:fink.fink",
+            displayName: "Erimayas Fink",
+            avatarUrl: null,
         };
     }
 
+    async componentDidMount() {
+        // Fetch the current user profile for the message preview
+        const client = MatrixClientPeg.get();
+        const userId = client.getUserId();
+        const profileInfo = await client.getProfileInfo(userId);
+
+        this.setState({
+            userId,
+            displayName: profileInfo.displayname,
+            avatarUrl: profileInfo.avatar_url,
+        });
+    }
+
     private calculateThemeState(): IThemeState {
         // We have to mirror the logic from ThemeWatcher.getEffectiveTheme so we
         // show the right values for things.
@@ -307,6 +328,9 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
                 className="mx_AppearanceUserSettingsTab_fontSlider_preview"
                 message={this.MESSAGE_PREVIEW_TEXT}
                 layout={this.state.layout}
+                userId={this.state.userId}
+                displayName={this.state.displayName}
+                avatarUrl={this.state.avatarUrl}
             />
             <div className="mx_AppearanceUserSettingsTab_fontSlider">
                 <div className="mx_AppearanceUserSettingsTab_fontSlider_smallText">Aa</div>

src/components/views/voice_messages/LiveRecordingClock.tsx

@@ -15,12 +15,12 @@ limitations under the License.
 */
 
 import React from "react";
-import {IRecordingUpdate, VoiceRecorder} from "../../../voice/VoiceRecorder";
+import {IRecordingUpdate, VoiceRecording} from "../../../voice/VoiceRecording";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import Clock from "./Clock";
 
 interface IProps {
-    recorder: VoiceRecorder;
+    recorder: VoiceRecording;
 }
 
 interface IState {

src/components/views/voice_messages/LiveRecordingWaveform.tsx

@@ -15,14 +15,14 @@ limitations under the License.
 */
 
 import React from "react";
-import {IRecordingUpdate, VoiceRecorder} from "../../../voice/VoiceRecorder";
+import {IRecordingUpdate, VoiceRecording} from "../../../voice/VoiceRecording";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 import {arrayFastResample, arraySeed} from "../../../utils/arrays";
 import {percentageOf} from "../../../utils/numbers";
 import Waveform from "./Waveform";
 
 interface IProps {
-    recorder: VoiceRecorder;
+    recorder: VoiceRecording;
 }
 
 interface IState {

src/components/views/voip/CallView.tsx

@@ -40,9 +40,6 @@ interface IProps {
         // Another ongoing call to display information about
         secondaryCall?: MatrixCall,
 
-        // maxHeight style attribute for the video panel
-        maxVideoHeight?: number;
-
         // a callback which is called when the content in the callview changes
         // in a way that is likely to cause a resize.
         onResize?: any;
@@ -96,9 +93,6 @@ function exitFullscreen() {
 const CONTROLS_HIDE_DELAY = 1000;
 // Height of the header duplicated from CSS because we need to subtract it from our max
 // height to get the max height of the video
-const HEADER_HEIGHT = 44;
-const BOTTOM_PADDING = 10;
-const BOTTOM_MARGIN_TOP_BOTTOM = 10; // top margin plus bottom margin
 const CONTEXT_MENU_VPADDING = 8; // How far the context menu sits above the button (px)
 
 @replaceableComponent("views.voip.CallView")
@@ -364,6 +358,11 @@ export default class CallView extends React.Component<IProps, IState> {
         CallHandler.sharedInstance().setActiveCallRoomId(userFacingRoomId);
     }
 
+    private onTransferClick = () => {
+        const transfereeCall = CallHandler.sharedInstance().getTransfereeForCallId(this.props.call.callId);
+        this.props.call.transferToCall(transfereeCall);
+    }
+
     public render() {
         const client = MatrixClientPeg.get();
         const callRoomId = CallHandler.roomIdForCall(this.props.call);
@@ -479,25 +478,52 @@ export default class CallView extends React.Component<IProps, IState> {
         // for voice calls (fills the bg)
         let contentView: React.ReactNode;
 
+        const transfereeCall = CallHandler.sharedInstance().getTransfereeForCallId(this.props.call.callId);
         const isOnHold = this.state.isLocalOnHold || this.state.isRemoteOnHold;
-        let onHoldText = null;
-        if (this.state.isRemoteOnHold) {
-            const holdString = CallHandler.sharedInstance().hasAnyUnheldCall() ?
-                _td("You held the call <a>Switch</a>") : _td("You held the call <a>Resume</a>");
-            onHoldText = _t(holdString, {}, {
-                a: sub => <AccessibleButton kind="link" onClick={this.onCallResumeClick}>
-                    {sub}
-                </AccessibleButton>,
-            });
-        } else if (this.state.isLocalOnHold) {
-            onHoldText = _t("%(peerName)s held the call", {
-                peerName: this.props.call.getOpponentMember().name,
-            });
+        let holdTransferContent;
+        if (transfereeCall) {
+            const transferTargetRoom = MatrixClientPeg.get().getRoom(CallHandler.roomIdForCall(this.props.call));
+            const transferTargetName = transferTargetRoom ? transferTargetRoom.name : _t("unknown person");
+
+            const transfereeRoom = MatrixClientPeg.get().getRoom(
+                CallHandler.roomIdForCall(transfereeCall),
+            );
+            const transfereeName = transfereeRoom ? transfereeRoom.name : _t("unknown person");
+
+            holdTransferContent = <div className="mx_CallView_holdTransferContent">
+                {_t(
+                    "Consulting with %(transferTarget)s. <a>Transfer to %(transferee)s</a>",
+                    {
+                        transferTarget: transferTargetName,
+                        transferee: transfereeName,
+                    },
+                    {
+                        a: sub => <AccessibleButton kind="link" onClick={this.onTransferClick}>{sub}</AccessibleButton>,
+                    },
+                )}
+            </div>;
+        } else if (isOnHold) {
+            let onHoldText = null;
+            if (this.state.isRemoteOnHold) {
+                const holdString = CallHandler.sharedInstance().hasAnyUnheldCall() ?
+                    _td("You held the call <a>Switch</a>") : _td("You held the call <a>Resume</a>");
+                onHoldText = _t(holdString, {}, {
+                    a: sub => <AccessibleButton kind="link" onClick={this.onCallResumeClick}>
+                        {sub}
+                    </AccessibleButton>,
+                });
+            } else if (this.state.isLocalOnHold) {
+                onHoldText = _t("%(peerName)s held the call", {
+                    peerName: this.props.call.getOpponentMember().name,
+                });
+            }
+            holdTransferContent = <div className="mx_CallView_holdTransferContent">
+                {onHoldText}
+            </div>;
         }
 
         if (this.props.call.type === CallType.Video) {
             let localVideoFeed = null;
-            let onHoldContent = null;
             let onHoldBackground = null;
             const backgroundStyle: CSSProperties = {};
             const containerClasses = classNames({
@@ -505,9 +531,6 @@ export default class CallView extends React.Component<IProps, IState> {
                 mx_CallView_video_hold: isOnHold,
             });
             if (isOnHold) {
-                onHoldContent = <div className="mx_CallView_video_holdContent">
-                    {onHoldText}
-                </div>;
                 const backgroundAvatarUrl = avatarUrlForMember(
                     // is it worth getting the size of the div to pass here?
                     this.props.call.getOpponentMember(), 1024, 1024, 'crop',
@@ -519,22 +542,11 @@ export default class CallView extends React.Component<IProps, IState> {
                 localVideoFeed = <VideoFeed type={VideoFeedType.Local} call={this.props.call} />;
             }
 
-            // if we're fullscreen, we don't want to set a maxHeight on the video element.
-            const maxVideoHeight = getFullScreenElement() || !this.props.maxVideoHeight ? null : (
-                this.props.maxVideoHeight - (HEADER_HEIGHT + BOTTOM_PADDING + BOTTOM_MARGIN_TOP_BOTTOM)
-            );
-            contentView = <div className={containerClasses}
-                ref={this.contentRef} onMouseMove={this.onMouseMove}
-                // Put the max height on here too because this div is ended up 4px larger than the content
-                // and is causing it to scroll, and I am genuinely baffled as to why.
-                style={{maxHeight: maxVideoHeight}}
-            >
+            contentView = <div className={containerClasses} ref={this.contentRef} onMouseMove={this.onMouseMove}>
                 {onHoldBackground}
-                <VideoFeed type={VideoFeedType.Remote} call={this.props.call} onResize={this.props.onResize}
-                    maxHeight={maxVideoHeight}
-                />
+                <VideoFeed type={VideoFeedType.Remote} call={this.props.call} onResize={this.props.onResize} />
                 {localVideoFeed}
-                {onHoldContent}
+                {holdTransferContent}
                 {callControls}
             </div>;
         } else {
@@ -554,7 +566,7 @@ export default class CallView extends React.Component<IProps, IState> {
                         />
                     </div>
                 </div>
-                <div className="mx_CallView_voice_holdText">{onHoldText}</div>
+                {holdTransferContent}
                 {callControls}
             </div>;
         }

src/components/views/voip/CallViewForRoom.tsx

@@ -19,6 +19,8 @@ import React from 'react';
 import CallHandler from '../../../CallHandler';
 import CallView from './CallView';
 import dis from '../../../dispatcher/dispatcher';
+import {Resizable} from "re-resizable";
+import ResizeNotifier from "../../../utils/ResizeNotifier";
 import {replaceableComponent} from "../../../utils/replaceableComponent";
 
 interface IProps {
@@ -28,9 +30,7 @@ interface IProps {
     // maxHeight style attribute for the video panel
     maxVideoHeight?: number;
 
-    // a callback which is called when the content in the callview changes
-    // in a way that is likely to cause a resize.
-    onResize?: any;
+    resizeNotifier: ResizeNotifier,
 }
 
 interface IState {
@@ -79,11 +79,50 @@ export default class CallViewForRoom extends React.Component<IProps, IState> {
         return call;
     }
 
+    private onResizeStart = () => {
+        this.props.resizeNotifier.startResizing();
+    };
+
+    private onResize = () => {
+        this.props.resizeNotifier.notifyTimelineHeightChanged();
+    };
+
+    private onResizeStop = () => {
+        this.props.resizeNotifier.stopResizing();
+    };
+
     public render() {
         if (!this.state.call) return null;
+        // We subtract 8 as it the margin-bottom of the mx_CallViewForRoom_ResizeWrapper
+        const maxHeight = this.props.maxVideoHeight - 8;
 
-        return <CallView call={this.state.call} pipMode={false}
-            onResize={this.props.onResize} maxVideoHeight={this.props.maxVideoHeight}
-        />;
+        return (
+            <div className="mx_CallViewForRoom">
+                <Resizable
+                    minHeight={380}
+                    maxHeight={maxHeight}
+                    enable={{
+                        top: false,
+                        right: false,
+                        bottom: true,
+                        left: false,
+                        topRight: false,
+                        bottomRight: false,
+                        bottomLeft: false,
+                        topLeft: false,
+                    }}
+                    onResizeStart={this.onResizeStart}
+                    onResize={this.onResize}
+                    onResizeStop={this.onResizeStop}
+                    className="mx_CallViewForRoom_ResizeWrapper"
+                    handleClasses={{bottom: "mx_CallViewForRoom_ResizeHandle"}}
+                >
+                    <CallView
+                        call={this.state.call}
+                        pipMode={false}
+                    />
+                </Resizable>
+            </div>
+        );
     }
 }

src/components/views/voip/VideoFeed.tsx

@@ -30,9 +30,6 @@ interface IProps {
 
     type: VideoFeedType,
 
-    // maxHeight style attribute for the video element
-    maxHeight?: number,
-
     // a callback which is called when the video element is resized
     // due to a change in video metadata
     onResize?: (e: Event) => void,
@@ -82,9 +79,6 @@ export default class VideoFeed extends React.Component<IProps> {
             ),
         };
 
-        let videoStyle = {};
-        if (this.props.maxHeight) videoStyle = { maxHeight: this.props.maxHeight };
-
-        return <video className={classnames(videoClasses)} ref={this.vid} style={videoStyle} />;
+        return <video className={classnames(videoClasses)} ref={this.vid} />;
     }
 }