Merge branch 'develop' into key-bindings

src/components/views/avatars/RoomAvatar.tsx

@@ -13,7 +13,7 @@ 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 React, {ComponentProps} from 'react';
 import Room from 'matrix-js-sdk/src/models/room';
 import {getHttpUriForMxc} from 'matrix-js-sdk/src/content-repo';
 
@@ -24,7 +24,7 @@ import Modal from '../../../Modal';
 import * as Avatar from '../../../Avatar';
 import {ResizeMethod} from "../../../Avatar";
 
-interface IProps {
+interface IProps extends Omit<ComponentProps<typeof BaseAvatar>, "name" | "idName" | "url" | "onClick"> {
     // Room may be left unset here, but if it is,
     // oobData.avatarUrl should be set (else there
     // would be nowhere to get the avatar from)

src/components/views/dialogs/AddExistingToSpaceDialog.tsx

@@ -0,0 +1,208 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useState} from "react";
+import classNames from "classnames";
+import {Room} from "matrix-js-sdk/src/models/room";
+import {MatrixClient} from "matrix-js-sdk/src/client";
+
+import {_t} from '../../../languageHandler';
+import {IDialogProps} from "./IDialogProps";
+import BaseDialog from "./BaseDialog";
+import FormButton from "../elements/FormButton";
+import Dropdown from "../elements/Dropdown";
+import SearchBox from "../../structures/SearchBox";
+import SpaceStore from "../../../stores/SpaceStore";
+import RoomAvatar from "../avatars/RoomAvatar";
+import {getDisplayAliasForRoom} from "../../../Rooms";
+import AccessibleButton from "../elements/AccessibleButton";
+import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
+import {allSettled} from "../../../utils/promise";
+import DMRoomMap from "../../../utils/DMRoomMap";
+import {calculateRoomVia} from "../../../utils/permalinks/Permalinks";
+import StyledCheckbox from "../elements/StyledCheckbox";
+
+interface IProps extends IDialogProps {
+    matrixClient: MatrixClient;
+    space: Room;
+    onCreateRoomClick(cli: MatrixClient, space: Room): void;
+}
+
+const Entry = ({ room, checked, onChange }) => {
+    return <div className="mx_AddExistingToSpaceDialog_entry">
+        <RoomAvatar room={room} height={32} width={32} />
+        <span className="mx_AddExistingToSpaceDialog_entry_name">{ room.name }</span>
+        <StyledCheckbox onChange={(e) => onChange(e.target.checked)} checked={checked} />
+    </div>;
+};
+
+const AddExistingToSpaceDialog: React.FC<IProps> = ({ matrixClient: cli, space, onCreateRoomClick, onFinished }) => {
+    const [query, setQuery] = useState("");
+    const lcQuery = query.toLowerCase();
+
+    const [selectedSpace, setSelectedSpace] = useState(space);
+    const [selectedToAdd, setSelectedToAdd] = useState(new Set<Room>());
+
+    const existingSubspaces = SpaceStore.instance.getChildSpaces(space.roomId);
+    const existingSubspacesSet = new Set(existingSubspaces);
+    const spaces = SpaceStore.instance.getSpaces().filter(s => {
+        return !existingSubspacesSet.has(s) // not already in space
+            && space !== s // not the top-level space
+            && selectedSpace !== s // not the selected space
+            && s.name.toLowerCase().includes(lcQuery); // contains query
+    });
+
+    const existingRooms = SpaceStore.instance.getChildRooms(space.roomId);
+    const existingRoomsSet = new Set(existingRooms);
+    const rooms = cli.getVisibleRooms().filter(room => {
+        return !existingRoomsSet.has(room) // not already in space
+            && room.name.toLowerCase().includes(lcQuery) // contains query
+            && !DMRoomMap.shared().getUserIdForRoomId(room.roomId); // not a DM
+    });
+
+    const [busy, setBusy] = useState(false);
+    const [error, setError] = useState("");
+
+    let spaceOptionSection;
+    if (existingSubspacesSet.size > 0) {
+        const options = [space, ...existingSubspaces].map((space) => {
+            const classes = classNames("mx_AddExistingToSpaceDialog_dropdownOption", {
+                mx_AddExistingToSpaceDialog_dropdownOptionActive: space === selectedSpace,
+            });
+            return <div key={space.roomId} className={classes}>
+                <RoomAvatar room={space} width={24} height={24} />
+                { space.name || getDisplayAliasForRoom(space) || space.roomId }
+            </div>;
+        });
+
+        spaceOptionSection = (
+            <Dropdown
+                id="mx_SpaceSelectDropdown"
+                onOptionChange={(key: string) => {
+                    setSelectedSpace(existingSubspaces.find(space => space.roomId === key) || space);
+                }}
+                value={selectedSpace.roomId}
+                label={_t("Space selection")}
+            >
+                { options }
+            </Dropdown>
+        );
+    } else {
+        spaceOptionSection = <div className="mx_AddExistingToSpaceDialog_onlySpace">
+            { space.name || getDisplayAliasForRoom(space) || space.roomId }
+        </div>;
+    }
+
+    const title = <React.Fragment>
+        <RoomAvatar room={selectedSpace} height={40} width={40} />
+        <div>
+            <h1>{ _t("Add existing spaces/rooms") }</h1>
+            { spaceOptionSection }
+        </div>
+    </React.Fragment>;
+
+    return <BaseDialog
+        title={title}
+        className="mx_AddExistingToSpaceDialog"
+        contentId="mx_AddExistingToSpaceDialog"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        { error && <div className="mx_AddExistingToSpaceDialog_errorText">{ error }</div> }
+
+        <SearchBox
+            className="mx_textinput_icon mx_textinput_search"
+            placeholder={ _t("Filter your rooms and spaces") }
+            onSearch={setQuery}
+        />
+        <AutoHideScrollbar className="mx_AddExistingToSpaceDialog_content" id="mx_AddExistingToSpaceDialog">
+            { spaces.length > 0 ? (
+                <div className="mx_AddExistingToSpaceDialog_section mx_AddExistingToSpaceDialog_section_spaces">
+                    <h3>{ _t("Spaces") }</h3>
+                    { spaces.map(space => {
+                        return <Entry
+                            key={space.roomId}
+                            room={space}
+                            checked={selectedToAdd.has(space)}
+                            onChange={(checked) => {
+                                if (checked) {
+                                    selectedToAdd.add(space);
+                                } else {
+                                    selectedToAdd.delete(space);
+                                }
+                                setSelectedToAdd(new Set(selectedToAdd));
+                            }}
+                        />;
+                    }) }
+                </div>
+            ) : null }
+
+            { rooms.length > 0 ? (
+                <div className="mx_AddExistingToSpaceDialog_section">
+                    <h3>{ _t("Rooms") }</h3>
+                    { rooms.map(room => {
+                        return <Entry
+                            key={room.roomId}
+                            room={room}
+                            checked={selectedToAdd.has(room)}
+                            onChange={(checked) => {
+                                if (checked) {
+                                    selectedToAdd.add(room);
+                                } else {
+                                    selectedToAdd.delete(room);
+                                }
+                                setSelectedToAdd(new Set(selectedToAdd));
+                            }}
+                        />;
+                    }) }
+                </div>
+            ) : undefined }
+
+            { spaces.length + rooms.length < 1 ? <span className="mx_AddExistingToSpaceDialog_noResults">
+                { _t("No results") }
+            </span> : undefined }
+        </AutoHideScrollbar>
+
+        <div className="mx_AddExistingToSpaceDialog_footer">
+            <span>
+                <div>{ _t("Don't want to add an existing room?") }</div>
+                <AccessibleButton onClick={() => onCreateRoomClick(cli, space)} kind="link">
+                    { _t("Create a new room") }
+                </AccessibleButton>
+            </span>
+
+            <FormButton
+                label={busy ? _t("Applying...") : _t("Apply")}
+                disabled={busy || selectedToAdd.size < 1}
+                onClick={async () => {
+                    setBusy(true);
+                    try {
+                        await allSettled(Array.from(selectedToAdd).map((room) =>
+                            SpaceStore.instance.addRoomToSpace(space, room.roomId, calculateRoomVia(room))));
+                        onFinished(true);
+                    } catch (e) {
+                        console.error("Failed to add rooms to space", e);
+                        setError(_t("Failed to add rooms to space"));
+                    }
+                    setBusy(false);
+                }}
+            />
+        </div>
+    </BaseDialog>;
+};
+
+export default AddExistingToSpaceDialog;
+

src/components/views/dialogs/CreateRoomDialog.js

@@ -17,6 +17,8 @@ limitations under the License.
 
 import React from 'react';
 import PropTypes from 'prop-types';
+import {Room} from "matrix-js-sdk/src/models/room";
+
 import * as sdk from '../../../index';
 import SdkConfig from '../../../SdkConfig';
 import withValidation from '../elements/Validation';
@@ -30,6 +32,7 @@ export default class CreateRoomDialog extends React.Component {
     static propTypes = {
         onFinished: PropTypes.func.isRequired,
         defaultPublic: PropTypes.bool,
+        parentSpace: PropTypes.instanceOf(Room),
     };
 
     constructor(props) {
@@ -85,6 +88,10 @@ export default class CreateRoomDialog extends React.Component {
             opts.associatedWithCommunity = CommunityPrototypeStore.instance.getSelectedCommunityId();
         }
 
+        if (this.props.parentSpace) {
+            opts.parentSpace = this.props.parentSpace;
+        }
+
         return opts;
     }
 

src/components/views/dialogs/DevtoolsDialog.js

@@ -34,6 +34,10 @@ import {
 } from "matrix-js-sdk/src/crypto/verification/request/VerificationRequest";
 import WidgetStore from "../../../stores/WidgetStore";
 import {UPDATE_EVENT} from "../../../stores/AsyncStore";
+import {SETTINGS} from "../../../settings/Settings";
+import SettingsStore, {LEVEL_ORDER} from "../../../settings/SettingsStore";
+import Modal from "../../../Modal";
+import ErrorDialog from "./ErrorDialog";
 
 class GenericEditor extends React.PureComponent {
     // static propTypes = {onBack: PropTypes.func.isRequired};
@@ -794,6 +798,286 @@ class WidgetExplorer extends React.Component {
     }
 }
 
+class SettingsExplorer extends React.Component {
+    static getLabel() {
+        return _t("Settings Explorer");
+    }
+
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            query: '',
+            editSetting: null, // set to a setting ID when editing
+            viewSetting: null, // set to a setting ID when exploring in detail
+
+            explicitValues: null, // stringified JSON for edit view
+            explicitRoomValues: null, // stringified JSON for edit view
+        };
+    }
+
+    onQueryChange = (ev) => {
+        this.setState({query: ev.target.value});
+    };
+
+    onExplValuesEdit = (ev) => {
+        this.setState({explicitValues: ev.target.value});
+    };
+
+    onExplRoomValuesEdit = (ev) => {
+        this.setState({explicitRoomValues: ev.target.value});
+    };
+
+    onBack = () => {
+        if (this.state.editSetting) {
+            this.setState({editSetting: null});
+        } else if (this.state.viewSetting) {
+            this.setState({viewSetting: null});
+        } else {
+            this.props.onBack();
+        }
+    };
+
+    onViewClick = (ev, settingId) => {
+        ev.preventDefault();
+        this.setState({viewSetting: settingId});
+    };
+
+    onEditClick = (ev, settingId) => {
+        ev.preventDefault();
+        this.setState({
+            editSetting: settingId,
+            explicitValues: this.renderExplicitSettingValues(settingId, null),
+            explicitRoomValues: this.renderExplicitSettingValues(settingId, this.props.room.roomId),
+        });
+    };
+
+    onSaveClick = async () => {
+        try {
+            const settingId = this.state.editSetting;
+            const parsedExplicit = JSON.parse(this.state.explicitValues);
+            const parsedExplicitRoom = JSON.parse(this.state.explicitRoomValues);
+            for (const level of Object.keys(parsedExplicit)) {
+                console.log(`[Devtools] Setting value of ${settingId} at ${level} from user input`);
+                try {
+                    const val = parsedExplicit[level];
+                    await SettingsStore.setValue(settingId, null, level, val);
+                } catch (e) {
+                    console.warn(e);
+                }
+            }
+            const roomId = this.props.room.roomId;
+            for (const level of Object.keys(parsedExplicit)) {
+                console.log(`[Devtools] Setting value of ${settingId} at ${level} in ${roomId} from user input`);
+                try {
+                    const val = parsedExplicitRoom[level];
+                    await SettingsStore.setValue(settingId, roomId, level, val);
+                } catch (e) {
+                    console.warn(e);
+                }
+            }
+            this.setState({
+                viewSetting: settingId,
+                editSetting: null,
+            });
+        } catch (e) {
+            Modal.createTrackedDialog('Devtools - Failed to save settings', '', ErrorDialog, {
+                title: _t("Failed to save settings"),
+                description: e.message,
+            });
+        }
+    };
+
+    renderSettingValue(val) {
+        // Note: we don't .toString() a string because we want JSON.stringify to inject quotes for us
+        const toStringTypes = ['boolean', 'number'];
+        if (toStringTypes.includes(typeof(val))) {
+            return val.toString();
+        } else {
+            return JSON.stringify(val);
+        }
+    }
+
+    renderExplicitSettingValues(setting, roomId) {
+        const vals = {};
+        for (const level of LEVEL_ORDER) {
+            try {
+                vals[level] = SettingsStore.getValueAt(level, setting, roomId, true, true);
+                if (vals[level] === undefined) {
+                    vals[level] = null;
+                }
+            } catch (e) {
+                console.warn(e);
+            }
+        }
+        return JSON.stringify(vals, null, 4);
+    }
+
+    renderCanEditLevel(roomId, level) {
+        const canEdit = SettingsStore.canSetValue(this.state.editSetting, roomId, level);
+        const className = canEdit ? 'mx_DevTools_SettingsExplorer_mutable' : 'mx_DevTools_SettingsExplorer_immutable';
+        return <td className={className}><code>{canEdit.toString()}</code></td>;
+    }
+
+    render() {
+        const room = this.props.room;
+
+        if (!this.state.viewSetting && !this.state.editSetting) {
+            // view all settings
+            const allSettings = Object.keys(SETTINGS)
+                .filter(n => this.state.query ? n.toLowerCase().includes(this.state.query.toLowerCase()) : true);
+            return (
+                <div>
+                    <div className="mx_Dialog_content mx_DevTools_SettingsExplorer">
+                        <Field
+                            label={_t('Filter results')} autoFocus={true} size={64}
+                            type="text" autoComplete="off" value={this.state.query} onChange={this.onQueryChange}
+                            className="mx_TextInputDialog_input mx_DevTools_RoomStateExplorer_query"
+                        />
+                        <table>
+                            <thead>
+                            <tr>
+                                <th>{_t("Setting ID")}</th>
+                                <th>{_t("Value")}</th>
+                                <th>{_t("Value in this room")}</th>
+                            </tr>
+                            </thead>
+                            <tbody>
+                            {allSettings.map(i => (
+                                <tr key={i}>
+                                    <td>
+                                        <a href="" onClick={(e) => this.onViewClick(e, i)}>
+                                            <code>{i}</code>
+                                        </a>
+                                        <a href="" onClick={(e) => this.onEditClick(e, i)}
+                                           className='mx_DevTools_SettingsExplorer_edit'
+                                        >
+                                            ✏
+                                        </a>
+                                    </td>
+                                    <td>
+                                        <code>{this.renderSettingValue(SettingsStore.getValue(i))}</code>
+                                    </td>
+                                    <td>
+                                        <code>
+                                            {this.renderSettingValue(SettingsStore.getValue(i, room.roomId))}
+                                        </code>
+                                    </td>
+                                </tr>
+                            ))}
+                            </tbody>
+                        </table>
+                    </div>
+                    <div className="mx_Dialog_buttons">
+                        <button onClick={this.onBack}>{_t("Back")}</button>
+                    </div>
+                </div>
+            );
+        } else if (this.state.editSetting) {
+            return (
+                <div>
+                    <div className="mx_Dialog_content mx_DevTools_SettingsExplorer">
+                        <h3>{_t("Setting:")} <code>{this.state.editSetting}</code></h3>
+
+                        <div className='mx_DevTools_SettingsExplorer_warning'>
+                            <b>{_t("Caution:")}</b> {_t(
+                                "This UI does NOT check the types of the values. Use at your own risk.",
+                            )}
+                        </div>
+
+                        <div>
+                            {_t("Setting definition:")}
+                            <pre><code>{JSON.stringify(SETTINGS[this.state.editSetting], null, 4)}</code></pre>
+                        </div>
+
+                        <div>
+                            <table>
+                                <thead>
+                                <tr>
+                                    <th>{_t("Level")}</th>
+                                    <th>{_t("Settable at global")}</th>
+                                    <th>{_t("Settable at room")}</th>
+                                </tr>
+                                </thead>
+                                <tbody>
+                                    {LEVEL_ORDER.map(lvl => (
+                                        <tr key={lvl}>
+                                            <td><code>{lvl}</code></td>
+                                            {this.renderCanEditLevel(null, lvl)}
+                                            {this.renderCanEditLevel(room.roomId, lvl)}
+                                        </tr>
+                                    ))}
+                                </tbody>
+                            </table>
+                        </div>
+
+                        <div>
+                            <Field
+                                id="valExpl" label={_t("Values at explicit levels")} type="text"
+                                className="mx_DevTools_textarea" element="textarea"
+                                autoComplete="off" value={this.state.explicitValues}
+                                onChange={this.onExplValuesEdit}
+                            />
+                        </div>
+
+                        <div>
+                            <Field
+                                id="valExpl" label={_t("Values at explicit levels in this room")} type="text"
+                                className="mx_DevTools_textarea" element="textarea"
+                                autoComplete="off" value={this.state.explicitRoomValues}
+                                onChange={this.onExplRoomValuesEdit}
+                            />
+                        </div>
+
+                    </div>
+                    <div className="mx_Dialog_buttons">
+                        <button onClick={this.onSaveClick}>{_t("Save setting values")}</button>
+                        <button onClick={this.onBack}>{_t("Back")}</button>
+                    </div>
+                </div>
+            );
+        } else if (this.state.viewSetting) {
+            return (
+                <div>
+                    <div className="mx_Dialog_content mx_DevTools_SettingsExplorer">
+                        <h3>{_t("Setting:")} <code>{this.state.viewSetting}</code></h3>
+
+                        <div>
+                            {_t("Setting definition:")}
+                            <pre><code>{JSON.stringify(SETTINGS[this.state.viewSetting], null, 4)}</code></pre>
+                        </div>
+
+                        <div>
+                            {_t("Value:")}&nbsp;
+                            <code>{this.renderSettingValue(SettingsStore.getValue(this.state.viewSetting))}</code>
+                        </div>
+
+                        <div>
+                            {_t("Value in this room:")}&nbsp;
+                            <code>{this.renderSettingValue(SettingsStore.getValue(this.state.viewSetting, room.roomId))}</code>
+                        </div>
+
+                        <div>
+                            {_t("Values at explicit levels:")}
+                            <pre><code>{this.renderExplicitSettingValues(this.state.viewSetting, null)}</code></pre>
+                        </div>
+
+                        <div>
+                            {_t("Values at explicit levels in this room:")}
+                            <pre><code>{this.renderExplicitSettingValues(this.state.viewSetting, room.roomId)}</code></pre>
+                        </div>
+
+                    </div>
+                    <div className="mx_Dialog_buttons">
+                        <button onClick={(e) => this.onEditClick(e, this.state.viewSetting)}>{_t("Edit Values")}</button>
+                        <button onClick={this.onBack}>{_t("Back")}</button>
+                    </div>
+                </div>
+            );
+        }
+    }
+}
+
 const Entries = [
     SendCustomEvent,
     RoomStateExplorer,
@@ -802,6 +1086,7 @@ const Entries = [
     ServersInRoomList,
     VerificationExplorer,
     WidgetExplorer,
+    SettingsExplorer,
 ];
 
 export default class DevtoolsDialog extends React.PureComponent {

src/components/views/dialogs/InfoDialog.js

@@ -27,7 +27,7 @@ export default class InfoDialog extends React.Component {
         className: PropTypes.string,
         title: PropTypes.string,
         description: PropTypes.node,
-        button: PropTypes.string,
+        button: PropTypes.oneOfType(PropTypes.string, PropTypes.bool),
         onFinished: PropTypes.func,
         hasCloseButton: PropTypes.bool,
         onKeyDown: PropTypes.func,
@@ -60,11 +60,11 @@ export default class InfoDialog extends React.Component {
                 <div className={classNames("mx_Dialog_content", this.props.className)} id="mx_Dialog_content">
                     { this.props.description }
                 </div>
-                <DialogButtons primaryButton={this.props.button || _t('OK')}
+                { this.props.button !== false && <DialogButtons primaryButton={this.props.button || _t('OK')}
                     onPrimaryButtonClick={this.onFinished}
                     hasCancel={false}
                 >
-                </DialogButtons>
+                </DialogButtons> }
             </BaseDialog>
         );
     }

src/components/views/dialogs/InviteDialog.tsx

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import React, {createRef} from 'react';
-import {_t} from "../../../languageHandler";
+import {_t, _td} from "../../../languageHandler";
 import * as sdk from "../../../index";
 import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import {makeRoomPermalink, makeUserPermalink} from "../../../utils/permalinks/Permalinks";
@@ -48,6 +48,7 @@ import { MatrixCall } from 'matrix-js-sdk/src/webrtc/call';
 
 export const KIND_DM = "dm";
 export const KIND_INVITE = "invite";
+export const KIND_SPACE_INVITE = "space_invite";
 export const KIND_CALL_TRANSFER = "call_transfer";
 
 const INITIAL_ROOMS_SHOWN = 3; // Number of rooms to show at first
@@ -309,7 +310,7 @@ interface IInviteDialogProps {
     // not provided.
     kind: string,
 
-    // The room ID this dialog is for. Only required for KIND_INVITE.
+    // The room ID this dialog is for. Only required for KIND_INVITE and KIND_SPACE_INVITE.
     roomId: string,
 
     // The call to transfer. Only required for KIND_CALL_TRANSFER.
@@ -348,8 +349,8 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
     constructor(props) {
         super(props);
 
-        if (props.kind === KIND_INVITE && !props.roomId) {
-            throw new Error("When using KIND_INVITE a roomId is required for an InviteDialog");
+        if ((props.kind === KIND_INVITE || props.kind === KIND_SPACE_INVITE) && !props.roomId) {
+            throw new Error("When using KIND_INVITE or KIND_SPACE_INVITE a roomId is required for an InviteDialog");
         } else if (props.kind === KIND_CALL_TRANSFER && !props.call) {
             throw new Error("When using KIND_CALL_TRANSFER a call is required for an InviteDialog");
         }
@@ -1026,7 +1027,7 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             sectionSubname = _t("May include members not in %(communityName)s", {communityName});
         }
 
-        if (this.props.kind === KIND_INVITE) {
+        if (this.props.kind === KIND_INVITE || this.props.kind === KIND_SPACE_INVITE) {
             sectionName = kind === 'recents' ? _t("Recently Direct Messaged") : _t("Suggestions");
         }
 
@@ -1247,38 +1248,35 @@ export default class InviteDialog extends React.PureComponent<IInviteDialogProps
             }
             buttonText = _t("Go");
             goButtonFn = this._startDm;
-        } else if (this.props.kind === KIND_INVITE) {
-            title = _t("Invite to this room");
+        } else if (this.props.kind === KIND_INVITE || this.props.kind === KIND_SPACE_INVITE) {
+            title = this.props.kind === KIND_INVITE ? _t("Invite to this room") : _t("Invite to this space");
 
-            if (identityServersEnabled) {
-                helpText = _t(
-                    "Invite someone using their name, email address, username (like <userId/>) or " +
-                        "<a>share this room</a>.",
-                    {},
-                    {
-                        userId: () =>
-                            <a href={makeUserPermalink(userId)} rel="noreferrer noopener" target="_blank">{userId}</a>,
-                        a: (sub) =>
-                            <a href={makeRoomPermalink(this.props.roomId)} rel="noreferrer noopener" target="_blank">
-                                {sub}
-                            </a>,
-                    },
-                );
-            } else {
-                helpText = _t(
-                    "Invite someone using their name, username (like <userId/>) or <a>share this room</a>.",
-                    {},
-                    {
-                        userId: () =>
-                            <a href={makeUserPermalink(userId)} rel="noreferrer noopener" target="_blank">{userId}</a>,
-                        a: (sub) =>
-                            <a href={makeRoomPermalink(this.props.roomId)} rel="noreferrer noopener" target="_blank">
-                                {sub}
-                            </a>,
-                    },
-                );
+            let helpTextUntranslated;
+            if (this.props.kind === KIND_INVITE) {
+                if (identityServersEnabled) {
+                    helpTextUntranslated = _td("Invite someone using their name, email address, username " +
+                        "(like <userId/>) or <a>share this room</a>.");
+                } else {
+                    helpTextUntranslated = _td("Invite someone using their name, username " +
+                        "(like <userId/>) or <a>share this room</a>.");
+                }
+            } else { // KIND_SPACE_INVITE
+                if (identityServersEnabled) {
+                    helpTextUntranslated = _td("Invite someone using their name, email address, username " +
+                        "(like <userId/>) or <a>share this space</a>.");
+                } else {
+                    helpTextUntranslated = _td("Invite someone using their name, username " +
+                        "(like <userId/>) or <a>share this space</a>.");
+                }
             }
 
+            helpText = _t(helpTextUntranslated, {}, {
+                userId: () =>
+                    <a href={makeUserPermalink(userId)} rel="noreferrer noopener" target="_blank">{userId}</a>,
+                a: (sub) =>
+                    <a href={makeRoomPermalink(this.props.roomId)} rel="noreferrer noopener" target="_blank">{sub}</a>,
+            });
+
             buttonText = _t("Invite");
             goButtonFn = this._inviteUsers;
         } else if (this.props.kind === KIND_CALL_TRANSFER) {

src/components/views/dialogs/SpaceSettingsDialog.tsx

@@ -0,0 +1,162 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useState} from 'react';
+import {Room} from "matrix-js-sdk/src/models/room";
+import {MatrixClient} from "matrix-js-sdk/src/client";
+import {EventType} from "matrix-js-sdk/src/@types/event";
+
+import {_t} from '../../../languageHandler';
+import {IDialogProps} from "./IDialogProps";
+import BaseDialog from "./BaseDialog";
+import DevtoolsDialog from "./DevtoolsDialog";
+import SpaceBasicSettings from '../spaces/SpaceBasicSettings';
+import {getTopic} from "../elements/RoomTopic";
+import {avatarUrlForRoom} from "../../../Avatar";
+import ToggleSwitch from "../elements/ToggleSwitch";
+import AccessibleButton from "../elements/AccessibleButton";
+import FormButton from "../elements/FormButton";
+import Modal from "../../../Modal";
+import defaultDispatcher from "../../../dispatcher/dispatcher";
+import {allSettled} from "../../../utils/promise";
+import {useDispatcher} from "../../../hooks/useDispatcher";
+
+interface IProps extends IDialogProps {
+    matrixClient: MatrixClient;
+    space: Room;
+}
+
+const SpaceSettingsDialog: React.FC<IProps> = ({ matrixClient: cli, space, onFinished }) => {
+    useDispatcher(defaultDispatcher, ({action, ...params}) => {
+        if (action === "after_leave_room" && params.room_id === space.roomId) {
+            onFinished(false);
+        }
+    });
+
+    const [busy, setBusy] = useState(false);
+    const [error, setError] = useState("");
+
+    const userId = cli.getUserId();
+
+    const [newAvatar, setNewAvatar] = useState<File>(null); // undefined means to remove avatar
+    const canSetAvatar = space.currentState.maySendStateEvent(EventType.RoomAvatar, userId);
+    const avatarChanged = newAvatar !== null;
+
+    const [name, setName] = useState<string>(space.name);
+    const canSetName = space.currentState.maySendStateEvent(EventType.RoomName, userId);
+    const nameChanged = name !== space.name;
+
+    const currentTopic = getTopic(space);
+    const [topic, setTopic] = useState<string>(currentTopic);
+    const canSetTopic = space.currentState.maySendStateEvent(EventType.RoomTopic, userId);
+    const topicChanged = topic !== currentTopic;
+
+    const currentJoinRule = space.getJoinRule();
+    const [joinRule, setJoinRule] = useState(currentJoinRule);
+    const canSetJoinRule = space.currentState.maySendStateEvent(EventType.RoomJoinRules, userId);
+    const joinRuleChanged = joinRule !== currentJoinRule;
+
+    const onSave = async () => {
+        setBusy(true);
+        const promises = [];
+
+        if (avatarChanged) {
+            promises.push(cli.sendStateEvent(space.roomId, EventType.RoomAvatar, {
+                url: await cli.uploadContent(newAvatar),
+            }, ""));
+        }
+
+        if (nameChanged) {
+            promises.push(cli.setRoomName(space.roomId, name));
+        }
+
+        if (topicChanged) {
+            promises.push(cli.setRoomTopic(space.roomId, topic));
+        }
+
+        if (joinRuleChanged) {
+            promises.push(cli.sendStateEvent(space.roomId, EventType.RoomJoinRules, { join_rule: joinRule }, ""));
+        }
+
+        const results = await allSettled(promises);
+        setBusy(false);
+        const failures = results.filter(r => r.status === "rejected");
+        if (failures.length > 0) {
+            console.error("Failed to save space settings: ", failures);
+            setError(_t("Failed to save space settings."));
+        }
+    };
+
+    return <BaseDialog
+        title={_t("Space settings")}
+        className="mx_SpaceSettingsDialog"
+        contentId="mx_SpaceSettingsDialog"
+        onFinished={onFinished}
+        fixedWidth={false}
+    >
+        <div className="mx_SpaceSettingsDialog_content" id="mx_SpaceSettingsDialog">
+            <div>{ _t("Edit settings relating to your space.") }</div>
+
+            { error && <div className="mx_SpaceRoomView_errorText">{ error }</div> }
+
+            <SpaceBasicSettings
+                avatarUrl={avatarUrlForRoom(space, 80, 80, "crop")}
+                avatarDisabled={!canSetAvatar}
+                setAvatar={setNewAvatar}
+                name={name}
+                nameDisabled={!canSetName}
+                setName={setName}
+                topic={topic}
+                topicDisabled={!canSetTopic}
+                setTopic={setTopic}
+            />
+
+            <div>
+                { _t("Make this space private") }
+                <ToggleSwitch
+                    checked={joinRule === "private"}
+                    onChange={checked => setJoinRule(checked ? "private" : "invite")}
+                    disabled={!canSetJoinRule}
+                    aria-label={_t("Make this space private")}
+                />
+            </div>
+
+            <FormButton
+                kind="danger"
+                label={_t("Leave Space")}
+                onClick={() => {
+                    defaultDispatcher.dispatch({
+                        action: "leave_room",
+                        room_id: space.roomId,
+                    });
+                }}
+            />
+
+            <div className="mx_SpaceSettingsDialog_buttons">
+                <AccessibleButton onClick={() => Modal.createDialog(DevtoolsDialog, {roomId: space.roomId})}>
+                    { _t("View dev tools") }
+                </AccessibleButton>
+                <AccessibleButton onClick={onFinished} disabled={busy} kind="link">
+                    { _t("Cancel") }
+                </AccessibleButton>
+                <FormButton onClick={onSave} disabled={busy} label={busy ? _t("Saving...") : _t("Save Changes")} />
+            </div>
+        </div>
+    </BaseDialog>;
+};
+
+export default SpaceSettingsDialog;
+

src/components/views/dialogs/TextInputDialog.js

@@ -18,6 +18,7 @@ import React, {createRef} from 'react';
 import PropTypes from 'prop-types';
 import * as sdk from '../../../index';
 import Field from "../elements/Field";
+import { _t, _td } from '../../../languageHandler';
 
 export default class TextInputDialog extends React.Component {
     static propTypes = {
@@ -29,6 +30,7 @@ export default class TextInputDialog extends React.Component {
         value: PropTypes.string,
         placeholder: PropTypes.string,
         button: PropTypes.string,
+        busyMessage: PropTypes.string, // pass _td string
         focus: PropTypes.bool,
         onFinished: PropTypes.func.isRequired,
         hasCancel: PropTypes.bool,
@@ -40,6 +42,7 @@ export default class TextInputDialog extends React.Component {
         title: "",
         value: "",
         description: "",
+        busyMessage: _td("Loading..."),
         focus: true,
         hasCancel: true,
     };
@@ -51,6 +54,7 @@ export default class TextInputDialog extends React.Component {
 
         this.state = {
             value: this.props.value,
+            busy: false,
             valid: false,
         };
     }
@@ -66,11 +70,13 @@ export default class TextInputDialog extends React.Component {
     onOk = async ev => {
         ev.preventDefault();
         if (this.props.validator) {
+            this.setState({ busy: true });
             await this._field.current.validate({ allowEmpty: false });
 
             if (!this._field.current.state.valid) {
                 this._field.current.focus();
                 this._field.current.validate({ allowEmpty: false, focused: true });
+                this.setState({ busy: false });
                 return;
             }
         }
@@ -125,7 +131,8 @@ export default class TextInputDialog extends React.Component {
                     </div>
                 </form>
                 <DialogButtons
-                    primaryButton={this.props.button}
+                    primaryButton={this.state.busy ? _t(this.props.busyMessage) : this.props.button}
+                    disabled={this.state.busy}
                     onPrimaryButtonClick={this.onOk}
                     onCancel={this.onCancel}
                     hasCancel={this.props.hasCancel}

src/components/views/elements/EventTilePreview.tsx

@@ -22,6 +22,7 @@ import * as Avatar from '../../../Avatar';
 import { MatrixClientPeg } from '../../../MatrixClientPeg';
 import EventTile from '../rooms/EventTile';
 import SettingsStore from "../../../settings/SettingsStore";
+import {Layout} from "../../../settings/Layout";
 import {UIFeature} from "../../../settings/UIFeature";
 
 interface IProps {
@@ -33,7 +34,7 @@ interface IProps {
     /**
      * Whether to use the irc layout or not
      */
-    useIRCLayout: boolean;
+    layout: Layout;
 
     /**
      * classnames to apply to the wrapper of the preview
@@ -121,14 +122,14 @@ export default class EventTilePreview extends React.Component<IProps, IState> {
         const event = this.fakeEvent(this.state);
 
         const className = classnames(this.props.className, {
-            "mx_IRCLayout": this.props.useIRCLayout,
-            "mx_GroupLayout": !this.props.useIRCLayout,
+            "mx_IRCLayout": this.props.layout == Layout.IRC,
+            "mx_GroupLayout": this.props.layout == Layout.Group,
         });
 
         return <div className={className}>
             <EventTile
                 mxEvent={event}
-                useIRCLayout={this.props.useIRCLayout}
+                layout={this.props.layout}
                 enableFlair={SettingsStore.getValue(UIFeature.Flair)}
             />
         </div>;

src/components/views/elements/LanguageDropdown.js

@@ -100,10 +100,10 @@ export default class LanguageDropdown extends React.Component {
         let language = SettingsStore.getValue("language", null, /*excludeDefault:*/true);
         let value = null;
         if (language) {
-          value = this.props.value || language;
+            value = this.props.value || language;
         } else {
-          language = navigator.language || navigator.userLanguage;
-          value = this.props.value || language;
+            language = navigator.language || navigator.userLanguage;
+            value = this.props.value || language;
         }
 
         return <Dropdown

src/components/views/elements/PersistentApp.js

@@ -31,6 +31,7 @@ export default class PersistentApp extends React.Component {
     componentDidMount() {
         this._roomStoreToken = RoomViewStore.addListener(this._onRoomViewStoreUpdate);
         ActiveWidgetStore.on('update', this._onActiveWidgetStoreUpdate);
+        MatrixClientPeg.get().on("Room.myMembership", this._onMyMembership);
     }
 
     componentWillUnmount() {
@@ -38,6 +39,9 @@ export default class PersistentApp extends React.Component {
             this._roomStoreToken.remove();
         }
         ActiveWidgetStore.removeListener('update', this._onActiveWidgetStoreUpdate);
+        if (MatrixClientPeg.get()) {
+            MatrixClientPeg.get().removeListener("Room.myMembership", this._onMyMembership);
+        }
     }
 
     _onRoomViewStoreUpdate = payload => {
@@ -53,16 +57,28 @@ export default class PersistentApp extends React.Component {
         });
     };
 
+    _onMyMembership = async (room, membership) => {
+        const persistentWidgetInRoomId = ActiveWidgetStore.getRoomId(this.state.persistentWidgetId);
+        if (membership !== "join") {
+            // we're not in the room anymore - delete
+            if (room.roomId === persistentWidgetInRoomId) {
+                ActiveWidgetStore.destroyPersistentWidget(this.state.persistentWidgetId);
+            }
+        }
+    };
+
     render() {
         if (this.state.persistentWidgetId) {
             const persistentWidgetInRoomId = ActiveWidgetStore.getRoomId(this.state.persistentWidgetId);
-            if (this.state.roomId !== persistentWidgetInRoomId) {
-                const persistentWidgetInRoom = MatrixClientPeg.get().getRoom(persistentWidgetInRoomId);
 
-                // Sanity check the room - the widget may have been destroyed between render cycles, and
-                // thus no room is associated anymore.
-                if (!persistentWidgetInRoom) return null;
+            const persistentWidgetInRoom = MatrixClientPeg.get().getRoom(persistentWidgetInRoomId);
 
+            // Sanity check the room - the widget may have been destroyed between render cycles, and
+            // thus no room is associated anymore.
+            if (!persistentWidgetInRoom) return null;
+
+            const myMembership = persistentWidgetInRoom.getMyMembership();
+            if (this.state.roomId !== persistentWidgetInRoomId && myMembership === "join") {
                 // get the widget data
                 const appEvent = WidgetUtils.getRoomWidgets(persistentWidgetInRoom).find((ev) => {
                     return ev.getStateKey() === ActiveWidgetStore.getPersistentWidgetId();

src/components/views/elements/ReplyThread.js

@@ -24,6 +24,7 @@ import {wantsDateSeparator} from '../../../DateUtils';
 import {MatrixEvent} from 'matrix-js-sdk';
 import {makeUserPermalink, RoomPermalinkCreator} from "../../../utils/permalinks/Permalinks";
 import SettingsStore from "../../../settings/SettingsStore";
+import {LayoutPropType} from "../../../settings/Layout";
 import escapeHtml from "escape-html";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import {Action} from "../../../dispatcher/actions";
@@ -42,7 +43,7 @@ export default class ReplyThread extends React.Component {
         onHeightChanged: PropTypes.func.isRequired,
         permalinkCreator: PropTypes.instanceOf(RoomPermalinkCreator).isRequired,
         // Specifies which layout to use.
-        useIRCLayout: PropTypes.bool,
+        layout: LayoutPropType,
     };
 
     static contextType = MatrixClientContext;
@@ -209,7 +210,7 @@ export default class ReplyThread extends React.Component {
         };
     }
 
-    static makeThread(parentEv, onHeightChanged, permalinkCreator, ref, useIRCLayout) {
+    static makeThread(parentEv, onHeightChanged, permalinkCreator, ref, layout) {
         if (!ReplyThread.getParentEventId(parentEv)) {
             return <div className="mx_ReplyThread_wrapper_empty" />;
         }
@@ -218,7 +219,7 @@ export default class ReplyThread extends React.Component {
             onHeightChanged={onHeightChanged}
             ref={ref}
             permalinkCreator={permalinkCreator}
-            useIRCLayout={useIRCLayout}
+            layout={layout}
         />;
     }
 
@@ -386,7 +387,7 @@ export default class ReplyThread extends React.Component {
                     permalinkCreator={this.props.permalinkCreator}
                     isRedacted={ev.isRedacted()}
                     isTwelveHour={SettingsStore.getValue("showTwelveHourTimestamps")}
-                    useIRCLayout={this.props.useIRCLayout}
+                    layout={this.props.layout}
                     enableFlair={SettingsStore.getValue(UIFeature.Flair)}
                     replacingEventId={ev.replacingEventId()}
                 />

src/components/views/elements/RoomDirectoryButton.js

@@ -1,41 +0,0 @@
-/*
-Copyright 2017 Vector Creations Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React from 'react';
-import * as sdk from '../../../index';
-import PropTypes from 'prop-types';
-import { _t } from '../../../languageHandler';
-import {Action} from "../../../dispatcher/actions";
-
-const RoomDirectoryButton = function(props) {
-    const ActionButton = sdk.getComponent('elements.ActionButton');
-    return (
-        <ActionButton action={Action.ViewRoomDirectory}
-            mouseOverAction={props.callout ? "callout_room_directory" : null}
-            label={_t("Room directory")}
-            iconPath={require("../../../../res/img/icons-directory.svg")}
-            size={props.size}
-            tooltip={props.tooltip}
-        />
-    );
-};
-
-RoomDirectoryButton.propTypes = {
-    size: PropTypes.string,
-    tooltip: PropTypes.bool,
-};
-
-export default RoomDirectoryButton;

src/components/views/elements/RoomName.tsx

@@ -0,0 +1,40 @@
+/*
+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 {useEffect, useState} from "react";
+import {Room} from "matrix-js-sdk/src/models/room";
+
+import {useEventEmitter} from "../../../hooks/useEventEmitter";
+
+interface IProps {
+    room: Room;
+    children?(name: string): JSX.Element;
+}
+
+const RoomName = ({ room, children }: IProps): JSX.Element => {
+    const [name, setName] = useState(room?.name);
+    useEventEmitter(room, "Room.name", () => {
+        setName(room?.name);
+    });
+    useEffect(() => {
+        setName(room?.name);
+    }, [room]);
+
+    if (children) return children(name);
+    return name || "";
+};
+
+export default RoomName;

src/components/views/elements/RoomTopic.tsx

@@ -0,0 +1,45 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useEffect, useState} from "react";
+import {EventType} from "matrix-js-sdk/src/@types/event";
+import {Room} from "matrix-js-sdk/src/models/room";
+
+import {useEventEmitter} from "../../../hooks/useEventEmitter";
+import {linkifyElement} from "../../../HtmlUtils";
+
+interface IProps {
+    room?: Room;
+    children?(topic: string, ref: (element: HTMLElement) => void): JSX.Element;
+}
+
+export const getTopic = room => room?.currentState?.getStateEvents(EventType.RoomTopic, "")?.getContent()?.topic;
+
+const RoomTopic = ({ room, children }: IProps): JSX.Element => {
+    const [topic, setTopic] = useState(getTopic(room));
+    useEventEmitter(room.currentState, "RoomState.events", () => {
+        setTopic(getTopic(room));
+    });
+    useEffect(() => {
+        setTopic(getTopic(room));
+    }, [room]);
+
+    const ref = e => e && linkifyElement(e);
+    if (children) return children(topic, ref);
+    return <span ref={ref}>{ topic }</span>;
+};
+
+export default RoomTopic;

src/components/views/elements/SpellCheckLanguagesDropdown.tsx

@@ -0,0 +1,126 @@
+/*
+Copyright 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 from 'react';
+
+import Dropdown from "../../views/elements/Dropdown"
+import * as sdk from '../../../index';
+import PlatformPeg from "../../../PlatformPeg";
+import SettingsStore from "../../../settings/SettingsStore";
+import { _t } from "../../../languageHandler";
+
+function languageMatchesSearchQuery(query, language) {
+    if (language.label.toUpperCase().includes(query.toUpperCase())) return true;
+    if (language.value.toUpperCase() === query.toUpperCase()) return true;
+    return false;
+}
+
+interface SpellCheckLanguagesDropdownIProps {
+    className: string,
+    value: string,
+    onOptionChange(language: string),
+}
+
+interface SpellCheckLanguagesDropdownIState {
+    searchQuery: string,
+    languages: any,
+}
+
+export default class SpellCheckLanguagesDropdown extends React.Component<SpellCheckLanguagesDropdownIProps,
+                                                                         SpellCheckLanguagesDropdownIState> {
+    constructor(props) {
+        super(props);
+        this._onSearchChange = this._onSearchChange.bind(this);
+
+        this.state = {
+            searchQuery: '',
+            languages: null,
+        };
+    }
+
+    componentDidMount() {
+        const plaf = PlatformPeg.get();
+        if (plaf) {
+            plaf.getAvailableSpellCheckLanguages().then((languages) => {
+                languages.sort(function(a, b) {
+                    if (a < b) return -1;
+                    if (a > b) return 1;
+                    return 0;
+                });
+                const langs = [];
+                languages.forEach((language) => {
+                    langs.push({
+                        label: language,
+                        value: language,
+                    })
+                })
+                this.setState({languages: langs});
+            }).catch((e) => {
+                this.setState({languages: ['en']});
+            });
+        }
+    }
+
+    _onSearchChange(search) {
+        this.setState({
+            searchQuery: search,
+        });
+    }
+
+    render() {
+        if (this.state.languages === null) {
+            const Spinner = sdk.getComponent('elements.Spinner');
+            return <Spinner />;
+        }
+
+        let displayedLanguages;
+        if (this.state.searchQuery) {
+            displayedLanguages = this.state.languages.filter((lang) => {
+                return languageMatchesSearchQuery(this.state.searchQuery, lang);
+            });
+        } else {
+            displayedLanguages = this.state.languages;
+        }
+
+        const options = displayedLanguages.map((language) => {
+            return <div key={language.value}>
+                { language.label }
+            </div>;
+        });
+
+        // default value here too, otherwise we need to handle null / undefined;
+        // values between mounting and the initial value propgating
+        let language = SettingsStore.getValue("language", null, /*excludeDefault:*/true);
+        let value = null;
+        if (language) {
+            value = this.props.value || language;
+        } else {
+            language = navigator.language || navigator.userLanguage;
+            value = this.props.value || language;
+        }
+
+        return <Dropdown
+            id="mx_LanguageDropdown"
+            className={this.props.className}
+            onOptionChange={this.props.onOptionChange}
+            onSearchChange={this._onSearchChange}
+            searchEnabled={true}
+            value={value}
+            label={_t("Language Dropdown")}>
+            { options }
+        </Dropdown>;
+    }
+}

src/components/views/elements/StartChatButton.js

@@ -1,40 +0,0 @@
-/*
-Copyright 2017 Vector Creations Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React from 'react';
-import * as sdk from '../../../index';
-import PropTypes from 'prop-types';
-import { _t } from '../../../languageHandler';
-
-const StartChatButton = function(props) {
-    const ActionButton = sdk.getComponent('elements.ActionButton');
-    return (
-        <ActionButton action="view_create_chat"
-            mouseOverAction={props.callout ? "callout_start_chat" : null}
-            label={_t("Start chat")}
-            iconPath={require("../../../../res/img/icons-people.svg")}
-            size={props.size}
-            tooltip={props.tooltip}
-        />
-    );
-};
-
-StartChatButton.propTypes = {
-    size: PropTypes.string,
-    tooltip: PropTypes.bool,
-};
-
-export default StartChatButton;

src/components/views/elements/TintableSvgButton.js

@@ -1,63 +0,0 @@
-/*
-Copyright 2017 New Vector Ltd
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import React from 'react';
-import PropTypes from 'prop-types';
-import TintableSvg from './TintableSvg';
-import AccessibleButton from './AccessibleButton';
-
-export default class TintableSvgButton extends React.Component {
-    constructor(props) {
-        super(props);
-    }
-
-    render() {
-        let classes = "mx_TintableSvgButton";
-        if (this.props.className) {
-            classes += " " + this.props.className;
-        }
-        return (
-            <span
-                width={this.props.width}
-                height={this.props.height}
-                className={classes}>
-                <TintableSvg
-                    src={this.props.src}
-                    width={this.props.width}
-                    height={this.props.height}
-                ></TintableSvg>
-                <AccessibleButton
-                    onClick={this.props.onClick}
-                    element='span'
-                    title={this.props.title}
-                />
-            </span>
-        );
-    }
-}
-
-TintableSvgButton.propTypes = {
-    src: PropTypes.string,
-    title: PropTypes.string,
-    className: PropTypes.string,
-    width: PropTypes.string.isRequired,
-    height: PropTypes.string.isRequired,
-    onClick: PropTypes.func,
-};
-
-TintableSvgButton.defaultProps = {
-    onClick: function() {},
-};

src/components/views/messages/MFileBody.js

@@ -288,7 +288,7 @@ export default class MFileBody extends React.Component {
                             <a ref={this._dummyLink} />
                         </div>
                         <iframe
-                            src={`${url}?origin=${encodeURIComponent(window.location.origin)}`}
+                            src={url}
                             onLoad={onIframeLoad}
                             ref={this._iframe}
                             sandbox="allow-scripts allow-downloads allow-downloads-without-user-activation" />

src/components/views/messages/TextualBody.js

@@ -99,6 +99,10 @@ export default class TextualBody extends React.Component {
                     // If there already is a div wrapping the codeblock we want to skip this.
                     // This happens after the codeblock was edited.
                     if (pres[i].parentNode.className == "mx_EventTile_pre_container") continue;
+                    // Add code element if it's missing since we depend on it
+                    if (pres[i].getElementsByTagName("code").length == 0) {
+                        this._addCodeElement(pres[i]);
+                    }
                     // Wrap a div around <pre> so that the copy button can be correctly positioned
                     // when the <pre> overflows and is scrolled horizontally.
                     const div = this._wrapInDiv(pres[i]);
@@ -128,6 +132,12 @@ export default class TextualBody extends React.Component {
         }
     }
 
+    _addCodeElement(pre) {
+        const code = document.createElement("code");
+        code.append(...pre.childNodes);
+        pre.appendChild(code);
+    }
+
     _addCodeExpansionButton(div, pre) {
         // Calculate how many percent does the pre element take up.
         // If it's less than 30% we don't add the expansion button.

src/components/views/right_panel/UserInfo.tsx

@@ -60,7 +60,9 @@ import QuestionDialog from "../dialogs/QuestionDialog";
 import ConfirmUserActionDialog from "../dialogs/ConfirmUserActionDialog";
 import InfoDialog from "../dialogs/InfoDialog";
 import { EventType } from "matrix-js-sdk/src/@types/event";
-import {SetRightPanelPhasePayload} from "../../../dispatcher/payloads/SetRightPanelPhasePayload";
+import { SetRightPanelPhasePayload } from "../../../dispatcher/payloads/SetRightPanelPhasePayload";
+import RoomAvatar from "../avatars/RoomAvatar";
+import RoomName from "../elements/RoomName";
 
 interface IDevice {
     deviceId: string;
@@ -302,7 +304,8 @@ const UserOptionsSection: React.FC<{
     member: RoomMember;
     isIgnored: boolean;
     canInvite: boolean;
-}> = ({member, isIgnored, canInvite}) => {
+    isSpace?: boolean;
+}> = ({member, isIgnored, canInvite, isSpace}) => {
     const cli = useContext(MatrixClientContext);
 
     let ignoreButton = null;
@@ -342,7 +345,7 @@ const UserOptionsSection: React.FC<{
             </AccessibleButton>
         );
 
-        if (member.roomId) {
+        if (member.roomId && !isSpace) {
             const onReadReceiptButton = function() {
                 const room = cli.getRoom(member.roomId);
                 dis.dispatch({
@@ -434,14 +437,18 @@ const UserOptionsSection: React.FC<{
     );
 };
 
-const warnSelfDemote = async () => {
+const warnSelfDemote = async (isSpace) => {
     const {finished} = Modal.createTrackedDialog('Demoting Self', '', QuestionDialog, {
         title: _t("Demote yourself?"),
         description:
             <div>
-                { _t("You will not be able to undo this change as you are demoting yourself, " +
-                    "if you are the last privileged user in the room it will be impossible " +
-                    "to regain privileges.") }
+                { isSpace
+                    ? _t("You will not be able to undo this change as you are demoting yourself, " +
+                        "if you are the last privileged user in the space it will be impossible " +
+                        "to regain privileges.")
+                    : _t("You will not be able to undo this change as you are demoting yourself, " +
+                        "if you are the last privileged user in the room it will be impossible " +
+                        "to regain privileges.") }
             </div>,
         button: _t("Demote"),
     });
@@ -717,7 +724,7 @@ const MuteToggleButton: React.FC<IBaseRoomProps> = ({member, room, powerLevels,
         // if muting self, warn as it may be irreversible
         if (target === cli.getUserId()) {
             try {
-                if (!(await warnSelfDemote())) return;
+                if (!(await warnSelfDemote(room?.isSpaceRoom()))) return;
             } catch (e) {
                 console.error("Failed to warn about self demotion: ", e);
                 return;
@@ -806,7 +813,7 @@ const RoomAdminToolsContainer: React.FC<IBaseRoomProps> = ({
     if (canAffectUser && me.powerLevel >= kickPowerLevel) {
         kickButton = <RoomKickButton member={member} startUpdating={startUpdating} stopUpdating={stopUpdating} />;
     }
-    if (me.powerLevel >= redactPowerLevel) {
+    if (me.powerLevel >= redactPowerLevel && !room.isSpaceRoom()) {
         redactButton = (
             <RedactMessagesButton member={member} startUpdating={startUpdating} stopUpdating={stopUpdating} />
         );
@@ -1085,7 +1092,7 @@ const PowerLevelEditor: React.FC<{
         } else if (myUserId === target) {
             // If we are changing our own PL it can only ever be decreasing, which we cannot reverse.
             try {
-                if (!(await warnSelfDemote())) return;
+                if (!(await warnSelfDemote(room?.isSpaceRoom()))) return;
             } catch (e) {
                 console.error("Failed to warn about self demotion: ", e);
             }
@@ -1315,12 +1322,10 @@ const BasicUserInfo: React.FC<{
     if (!isRoomEncrypted) {
         if (!cryptoEnabled) {
             text = _t("This client does not support end-to-end encryption.");
-        } else if (room) {
+        } else if (room && !room.isSpaceRoom()) {
             text = _t("Messages in this room are not end-to-end encrypted.");
-        } else {
-            // TODO what to render for GroupMember
         }
-    } else {
+    } else if (!room.isSpaceRoom()) {
         text = _t("Messages in this room are end-to-end encrypted.");
     }
 
@@ -1381,7 +1386,9 @@ const BasicUserInfo: React.FC<{
         <UserOptionsSection
             canInvite={roomPermissions.canInvite}
             isIgnored={isIgnored}
-            member={member} />
+            member={member}
+            isSpace={room?.isSpaceRoom()}
+        />
 
         { adminToolsContainer }
 
@@ -1498,7 +1505,7 @@ interface IProps {
     user: Member;
     groupId?: string;
     room?: Room;
-    phase: RightPanelPhases.RoomMemberInfo | RightPanelPhases.GroupMemberInfo;
+    phase: RightPanelPhases.RoomMemberInfo | RightPanelPhases.GroupMemberInfo | RightPanelPhases.SpaceMemberInfo;
     onClose(): void;
 }
 
@@ -1542,7 +1549,9 @@ const UserInfo: React.FC<Props> = ({
         previousPhase = RightPanelPhases.RoomMemberInfo;
         refireParams = {member: member};
     } else if (room) {
-        previousPhase = RightPanelPhases.RoomMemberList;
+        previousPhase = previousPhase = room.isSpaceRoom()
+            ? RightPanelPhases.SpaceMemberList
+            : RightPanelPhases.RoomMemberList;
     }
 
     const onEncryptionPanelClose = () => {
@@ -1557,6 +1566,7 @@ const UserInfo: React.FC<Props> = ({
     switch (phase) {
         case RightPanelPhases.RoomMemberInfo:
         case RightPanelPhases.GroupMemberInfo:
+        case RightPanelPhases.SpaceMemberInfo:
             content = (
                 <BasicUserInfo
                     room={room}
@@ -1587,7 +1597,18 @@ const UserInfo: React.FC<Props> = ({
         }
     }
 
-    const header = <UserInfoHeader member={member} e2eStatus={e2eStatus} />;
+    let scopeHeader;
+    if (room?.isSpaceRoom()) {
+        scopeHeader = <div className="mx_RightPanel_scopeHeader">
+            <RoomAvatar room={room} height={32} width={32} />
+            <RoomName room={room} />
+        </div>;
+    }
+
+    const header = <React.Fragment>
+        { scopeHeader }
+        <UserInfoHeader member={member} e2eStatus={e2eStatus} />
+    </React.Fragment>;
     return <BaseCard
         className={classes.join(" ")}
         header={header}

src/components/views/rooms/AuxPanel.tsx

@@ -19,7 +19,6 @@ import {MatrixClientPeg} from "../../../MatrixClientPeg";
 import { Room } from 'matrix-js-sdk/src/models/room'
 import * as sdk from '../../../index';
 import dis from "../../../dispatcher/dispatcher";
-import * as ObjectUtils from '../../../ObjectUtils';
 import AppsDrawer from './AppsDrawer';
 import { _t } from '../../../languageHandler';
 import classNames from 'classnames';
@@ -29,6 +28,7 @@ import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
 import {UIFeature} from "../../../settings/UIFeature";
 import { ResizeNotifier } from "../../../utils/ResizeNotifier";
 import CallViewForRoom from '../voip/CallViewForRoom';
+import {objectHasDiff} from "../../../utils/objects";
 
 interface IProps {
     // js-sdk room object
@@ -89,8 +89,7 @@ export default class AuxPanel extends React.Component<IProps, IState> {
     }
 
     shouldComponentUpdate(nextProps, nextState) {
-        return (!ObjectUtils.shallowEqual(this.props, nextProps) ||
-                !ObjectUtils.shallowEqual(this.state, nextState));
+        return objectHasDiff(this.props, nextProps) || objectHasDiff(this.state, nextState);
     }
 
     componentDidUpdate(prevProps, prevState) {

src/components/views/rooms/EventTile.js

@@ -27,17 +27,18 @@ 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';
 import {formatTime} from "../../../DateUtils";
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import {ALL_RULE_TYPES} from "../../../mjolnir/BanList";
-import * as ObjectUtils from "../../../ObjectUtils";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
 import {E2E_STATE} from "./E2EIcon";
 import {toRem} from "../../../utils/units";
 import {WidgetType} from "../../../widgets/WidgetType";
 import RoomAvatar from "../avatars/RoomAvatar";
 import {WIDGET_LAYOUT_EVENT_TYPE} from "../../../stores/widgets/WidgetLayoutStore";
+import {objectHasDiff} from "../../../utils/objects";
 
 const eventTileTypes = {
     'm.room.message': 'messages.MessageEvent',
@@ -227,8 +228,8 @@ export default class EventTile extends React.Component {
         // whether to show reactions for this event
         showReactions: PropTypes.bool,
 
-        // whether to use the irc layout
-        useIRCLayout: PropTypes.bool,
+        // which layout to use
+        layout: LayoutPropType,
 
         // whether or not to show flair at all
         enableFlair: PropTypes.bool,
@@ -293,7 +294,7 @@ export default class EventTile extends React.Component {
     }
 
     shouldComponentUpdate(nextProps, nextState) {
-        if (!ObjectUtils.shallowEqual(this.state, nextState)) {
+        if (objectHasDiff(this.state, nextState)) {
             return true;
         }
 
@@ -734,7 +735,7 @@ export default class EventTile extends React.Component {
             // joins/parts/etc
             avatarSize = 14;
             needsSenderProfile = false;
-        } else if (this.props.useIRCLayout) {
+        } else if (this.props.layout == Layout.IRC) {
             avatarSize = 14;
             needsSenderProfile = true;
         } else if (this.props.continuation && this.props.tileShape !== "file_grid") {
@@ -845,10 +846,11 @@ export default class EventTile extends React.Component {
                 { timestamp }
             </a>;
 
-        const groupTimestamp = !this.props.useIRCLayout ? linkedTimestamp : null;
-        const ircTimestamp = this.props.useIRCLayout ? linkedTimestamp : null;
-        const groupPadlock = !this.props.useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
-        const ircPadlock = this.props.useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
+        const useIRCLayout = this.props.layout == Layout.IRC;
+        const groupTimestamp = !useIRCLayout ? linkedTimestamp : null;
+        const ircTimestamp = useIRCLayout ? linkedTimestamp : null;
+        const groupPadlock = !useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
+        const ircPadlock = useIRCLayout && !isBubbleMessage && this._renderE2EPadlock();
 
         switch (this.props.tileShape) {
             case 'notif': {
@@ -943,16 +945,13 @@ export default class EventTile extends React.Component {
                     this.props.onHeightChanged,
                     this.props.permalinkCreator,
                     this._replyThread,
-                    this.props.useIRCLayout,
+                    this.props.layout,
                 );
 
                 // tab-index=-1 to allow it to be focusable but do not add tab stop for it, primarily for screen readers
                 return (
                     <div className={classes} tabIndex={-1} aria-live={ariaLive} aria-atomic="true">
                         { ircTimestamp }
-                        <div className="mx_EventTile_msgOption">
-                            { readAvatars }
-                        </div>
                         { sender }
                         { ircPadlock }
                         <div className="mx_EventTile_line">
@@ -971,6 +970,9 @@ export default class EventTile extends React.Component {
                             { reactionsRow }
                             { actionBar }
                         </div>
+                        <div className="mx_EventTile_msgOption">
+                            { readAvatars }
+                        </div>
                         {
                             // 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/MemberList.js

@@ -27,6 +27,8 @@ import * as sdk from "../../../index";
 import {CommunityPrototypeStore} from "../../../stores/CommunityPrototypeStore";
 import BaseCard from "../right_panel/BaseCard";
 import {RightPanelPhases} from "../../../stores/RightPanelStorePhases";
+import RoomAvatar from "../avatars/RoomAvatar";
+import RoomName from "../elements/RoomName";
 
 const INITIAL_LOAD_NUM_MEMBERS = 30;
 const INITIAL_LOAD_NUM_INVITED = 5;
@@ -450,22 +452,14 @@ export default class MemberList extends React.Component {
         let inviteButton;
 
         if (room && room.getMyMembership() === 'join') {
-            // assume we can invite until proven false
-            let canInvite = true;
-
-            const plEvent = room.currentState.getStateEvents("m.room.power_levels", "");
-            const me = room.getMember(cli.getUserId());
-            if (plEvent && me) {
-                const content = plEvent.getContent();
-                if (content && content.invite > me.powerLevel) {
-                    canInvite = false;
-                }
-            }
+            const canInvite = room.canInvite(cli.getUserId());
 
             let inviteButtonText = _t("Invite to this room");
             const chat = CommunityPrototypeStore.instance.getSelectedCommunityGeneralChat();
             if (chat && chat.roomId === this.props.roomId) {
                 inviteButtonText = _t("Invite to this community");
+            } else if (room.isSpaceRoom()) {
+                inviteButtonText = _t("Invite to this space");
             }
 
             const AccessibleButton = sdk.getComponent("elements.AccessibleButton");
@@ -493,12 +487,26 @@ export default class MemberList extends React.Component {
                 onSearch={ this.onSearchQueryChanged } />
         );
 
+        let previousPhase = RightPanelPhases.RoomSummary;
+        // We have no previousPhase for when viewing a MemberList from a Space
+        let scopeHeader;
+        if (room?.isSpaceRoom()) {
+            previousPhase = undefined;
+            scopeHeader = <div className="mx_RightPanel_scopeHeader">
+                <RoomAvatar room={room} height={32} width={32} />
+                <RoomName room={room} />
+            </div>;
+        }
+
         return <BaseCard
             className="mx_MemberList"
-            header={inviteButton}
+            header={<React.Fragment>
+                { scopeHeader }
+                { inviteButton }
+            </React.Fragment>}
             footer={footer}
             onClose={this.props.onClose}
-            previousPhase={RightPanelPhases.RoomSummary}
+            previousPhase={previousPhase}
         >
             <div className="mx_MemberList_wrapper">
                 <TruncatedList className="mx_MemberList_section mx_MemberList_joined" truncateAt={this.state.truncateAtJoined}

src/components/views/rooms/MessageComposer.js

@@ -1,7 +1,5 @@
 /*
-Copyright 2015, 2016 OpenMarket Ltd
-Copyright 2017, 2018 New Vector Ltd
-Copyright 2020 The Matrix.org Foundation C.I.C.
+Copyright 2015-2018, 2020, 2021 The Matrix.org Foundation C.I.C.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -19,7 +17,6 @@ import React, {createRef} from 'react';
 import classNames from 'classnames';
 import PropTypes from 'prop-types';
 import { _t } from '../../../languageHandler';
-import CallHandler from '../../../CallHandler';
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import * as sdk from '../../../index';
 import dis from '../../../dispatcher/dispatcher';
@@ -33,11 +30,8 @@ import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import ReplyPreview from "./ReplyPreview";
 import {UIFeature} from "../../../settings/UIFeature";
 import WidgetStore from "../../../stores/WidgetStore";
-import WidgetUtils from "../../../utils/WidgetUtils";
 import {UPDATE_EVENT} from "../../../stores/AsyncStore";
 import ActiveWidgetStore from "../../../stores/ActiveWidgetStore";
-import { PlaceCallType } from "../../../CallHandler";
-import { CallState } from 'matrix-js-sdk/src/webrtc/call';
 
 function ComposerAvatar(props) {
     const MemberStatusMessageAvatar = sdk.getComponent('avatars.MemberStatusMessageAvatar');
@@ -50,95 +44,18 @@ ComposerAvatar.propTypes = {
     me: PropTypes.object.isRequired,
 };
 
-function CallButton(props) {
-    const onVoiceCallClick = (ev) => {
-        dis.dispatch({
-            action: 'place_call',
-            type: PlaceCallType.Voice,
-            room_id: props.roomId,
-        });
-    };
-
-    return (<AccessibleTooltipButton
-        className="mx_MessageComposer_button mx_MessageComposer_voicecall"
-        onClick={onVoiceCallClick}
-        title={_t('Voice call')}
-    />);
-}
-
-CallButton.propTypes = {
-    roomId: PropTypes.string.isRequired,
-};
-
-function VideoCallButton(props) {
-    const onCallClick = (ev) => {
-        dis.dispatch({
-            action: 'place_call',
-            type: ev.shiftKey ? PlaceCallType.ScreenSharing : PlaceCallType.Video,
-            room_id: props.roomId,
-        });
-    };
-
-    return <AccessibleTooltipButton
-        className="mx_MessageComposer_button mx_MessageComposer_videocall"
-        onClick={onCallClick}
-        title={_t('Video call')}
-    />;
-}
-
-VideoCallButton.propTypes = {
-    roomId: PropTypes.string.isRequired,
-};
-
-function HangupButton(props) {
-    const onHangupClick = () => {
-        if (props.isConference) {
-            dis.dispatch({
-                action: props.canEndConference ? 'end_conference' : 'hangup_conference',
-                room_id: props.roomId,
-            });
-            return;
-        }
-
-        const call = CallHandler.sharedInstance().getCallForRoom(props.roomId);
-        if (!call) {
-            return;
-        }
-
-        const action = call.state === CallState.Ringing ? 'reject' : 'hangup';
-
-        dis.dispatch({
-            action,
-            // hangup the call for this room. NB. We use the room in props as the room ID
-            // as call.roomId may be the 'virtual room', and the dispatch actions always
-            // use the user-facing room (there was a time when we deliberately used
-            // call.roomId and *not* props.roomId, but that was for the old
-            // style Freeswitch conference calls and those times are gone.)
-            room_id: props.roomId,
-        });
-    };
-
-    let tooltip = _t("Hangup");
-    if (props.isConference && props.canEndConference) {
-        tooltip = _t("End conference");
-    }
-
-    const canLeaveConference = !props.isConference ? true : props.isInConference;
+function SendButton(props) {
     return (
         <AccessibleTooltipButton
-            className="mx_MessageComposer_button mx_MessageComposer_hangup"
-            onClick={onHangupClick}
-            title={tooltip}
-            disabled={!canLeaveConference}
+            className="mx_MessageComposer_sendMessage"
+            onClick={props.onClick}
+            title={_t('Send message')}
         />
     );
 }
 
-HangupButton.propTypes = {
-    roomId: PropTypes.string.isRequired,
-    isConference: PropTypes.bool.isRequired,
-    canEndConference: PropTypes.bool,
-    isInConference: PropTypes.bool,
+SendButton.propTypes = {
+    onClick: PropTypes.func.isRequired,
 };
 
 const EmojiButton = ({addEmoji}) => {
@@ -265,9 +182,9 @@ export default class MessageComposer extends React.Component {
         this.state = {
             tombstone: this._getRoomTombstone(),
             canSendMessages: this.props.room.maySendMessage(),
-            showCallButtons: SettingsStore.getValue("showCallButtonsInComposer"),
             hasConference: WidgetStore.instance.doesRoomHaveConference(this.props.room),
             joinedConference: WidgetStore.instance.isJoinedToConferenceIn(this.props.room),
+            isComposerEmpty: true,
         };
     }
 
@@ -396,6 +313,16 @@ export default class MessageComposer extends React.Component {
         });
     }
 
+    sendMessage = () => {
+        this.messageComposerInput._sendMessage();
+    }
+
+    onChange = (model) => {
+        this.setState({
+            isComposerEmpty: model.isEmpty,
+        });
+    }
+
     render() {
         const controls = [
             this.state.me ? <ComposerAvatar key="controls_avatar" me={this.state.me} /> : null,
@@ -405,12 +332,7 @@ export default class MessageComposer extends React.Component {
         ];
 
         if (!this.state.tombstone && this.state.canSendMessages) {
-            // This also currently includes the call buttons. Really we should
-            // check separately for whether we can call, but this is slightly
-            // complex because of conference calls.
-
             const SendMessageComposer = sdk.getComponent("rooms.SendMessageComposer");
-            const callInProgress = this.props.callState && this.props.callState !== 'ended';
 
             controls.push(
                 <SendMessageComposer
@@ -421,6 +343,7 @@ export default class MessageComposer extends React.Component {
                     resizeNotifier={this.props.resizeNotifier}
                     permalinkCreator={this.props.permalinkCreator}
                     replyToEvent={this.props.replyToEvent}
+                    onChange={this.onChange}
                 />,
                 <UploadButton key="controls_upload" roomId={this.props.room.roomId} />,
                 <EmojiButton key="emoji_button" addEmoji={this.addEmoji} />,
@@ -431,28 +354,10 @@ export default class MessageComposer extends React.Component {
                 controls.push(<Stickerpicker key="stickerpicker_controls_button" room={this.props.room} />);
             }
 
-            if (this.state.showCallButtons) {
-                if (this.state.hasConference) {
-                    const canEndConf = WidgetUtils.canUserModifyWidgets(this.props.room.roomId);
-                    controls.push(
-                        <HangupButton
-                            key="controls_hangup"
-                            roomId={this.props.room.roomId}
-                            isConference={true}
-                            canEndConference={canEndConf}
-                            isInConference={this.state.joinedConference}
-                        />,
-                    );
-                } else if (callInProgress) {
-                    controls.push(
-                        <HangupButton key="controls_hangup" roomId={this.props.room.roomId} isConference={false} />,
-                    );
-                } else {
-                    controls.push(
-                        <CallButton key="controls_call" roomId={this.props.room.roomId} />,
-                        <VideoCallButton key="controls_videocall" roomId={this.props.room.roomId} />,
-                    );
-                }
+            if (!this.state.isComposerEmpty) {
+                controls.push(
+                    <SendButton key="controls_send" onClick={this.sendMessage} />,
+                );
             }
         } else if (this.state.tombstone) {
             const replacementRoomId = this.state.tombstone.getContent()['replacement_room'];

src/components/views/rooms/NewRoomIntro.tsx

@@ -100,15 +100,8 @@ const NewRoomIntro = () => {
             });
         }
 
-        let canInvite = inRoom;
-        const powerLevels = room.currentState.getStateEvents(EventType.RoomPowerLevels, "")?.getContent();
-        const me = room.getMember(cli.getUserId());
-        if (powerLevels && me && powerLevels.invite > me.powerLevel) {
-            canInvite = false;
-        }
-
         let buttons;
-        if (canInvite) {
+        if (room.canInvite(cli.getUserId())) {
             const onInviteClick = () => {
                 dis.dispatch({ action: "view_invite", roomId });
             };

src/components/views/rooms/ReadReceiptMarker.js

@@ -32,7 +32,7 @@ try {
 } catch (e) {
 }
 
-export default class ReadReceiptMarker extends React.Component {
+export default class ReadReceiptMarker extends React.PureComponent {
     static propTypes = {
         // the RoomMember to show the RR for
         member: PropTypes.object,
@@ -155,7 +155,15 @@ export default class ReadReceiptMarker extends React.Component {
 
         // then shift to the rightmost column,
         // and then it will drop down to its resting position
-        startStyles.push({ top: startTopOffset+'px', left: '0px' });
+        //
+        // XXX: We use a fractional 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: '0.001px' });
         enterTransitionOpts.push({
             duration: bounce ? Math.min(Math.log(Math.abs(startTopOffset)) * 200, 3000) : 300,
             easing: bounce ? 'easeOutBounce' : 'easeOutCubic',

src/components/views/rooms/RoomHeader.js

@@ -15,14 +15,13 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, {createRef} from 'react';
+import React from 'react';
 import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import { _t } from '../../../languageHandler';
 import {MatrixClientPeg} from '../../../MatrixClientPeg';
 import RateLimitedFunc from '../../../ratelimitedfunc';
 
-import { linkifyElement } from '../../../HtmlUtils';
 import {CancelButton} from './SimpleRoomHeader';
 import SettingsStore from "../../../settings/SettingsStore";
 import RoomHeaderButtons from '../right_panel/RoomHeaderButtons';
@@ -30,6 +29,9 @@ import E2EIcon from './E2EIcon';
 import DecoratedRoomAvatar from "../avatars/DecoratedRoomAvatar";
 import {DefaultTagID} from "../../../stores/room-list/models";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
+import RoomTopic from "../elements/RoomTopic";
+import RoomName from "../elements/RoomName";
+import {PlaceCallType} from "../../../CallHandler";
 
 export default class RoomHeader extends React.Component {
     static propTypes = {
@@ -44,6 +46,7 @@ export default class RoomHeader extends React.Component {
         e2eStatus: PropTypes.string,
         onAppsClick: PropTypes.func,
         appsShown: PropTypes.bool,
+        onCallPlaced: PropTypes.func, // (PlaceCallType) => void;
     };
 
     static defaultProps = {
@@ -52,35 +55,13 @@ export default class RoomHeader extends React.Component {
         onCancelClick: null,
     };
 
-    constructor(props) {
-        super(props);
-
-        this._topic = createRef();
-    }
-
     componentDidMount() {
         const cli = MatrixClientPeg.get();
         cli.on("RoomState.events", this._onRoomStateEvents);
         cli.on("Room.accountData", this._onRoomAccountData);
-
-        // When a room name occurs, RoomState.events is fired *before*
-        // room.name is updated. So we have to listen to Room.name as well as
-        // RoomState.events.
-        if (this.props.room) {
-            this.props.room.on("Room.name", this._onRoomNameChange);
-        }
-    }
-
-    componentDidUpdate() {
-        if (this._topic.current) {
-            linkifyElement(this._topic.current);
-        }
     }
 
     componentWillUnmount() {
-        if (this.props.room) {
-            this.props.room.removeListener("Room.name", this._onRoomNameChange);
-        }
         const cli = MatrixClientPeg.get();
         if (cli) {
             cli.removeListener("RoomState.events", this._onRoomStateEvents);
@@ -109,10 +90,6 @@ export default class RoomHeader extends React.Component {
         this.forceUpdate();
     }, 500);
 
-    _onRoomNameChange = (room) => {
-        this.forceUpdate();
-    };
-
     _hasUnreadPins() {
         const currentPinEvent = this.props.room.currentState.getStateEvents("m.room.pinned_events", '');
         if (!currentPinEvent) return false;
@@ -170,29 +147,28 @@ export default class RoomHeader extends React.Component {
             }
         }
 
-        let roomName = _t("Join Room");
+        let oobName = _t("Join Room");
         if (this.props.oobData && this.props.oobData.name) {
-            roomName = this.props.oobData.name;
-        } else if (this.props.room) {
-            roomName = this.props.room.name;
+            oobName = this.props.oobData.name;
         }
 
         const textClasses = classNames('mx_RoomHeader_nametext', { mx_RoomHeader_settingsHint: settingsHint });
         const name =
             <div className="mx_RoomHeader_name" onClick={this.props.onSettingsClick}>
-                <div dir="auto" className={textClasses} title={roomName}>{ roomName }</div>
+                <RoomName room={this.props.room}>
+                    {(name) => {
+                        const roomName = name || oobName;
+                        return <div dir="auto" className={textClasses} title={roomName}>{ roomName }</div>;
+                    }}
+                </RoomName>
                 { searchStatus }
             </div>;
 
-        let topic;
-        if (this.props.room) {
-            const ev = this.props.room.currentState.getStateEvents('m.room.topic', '');
-            if (ev) {
-                topic = ev.getContent().topic;
-            }
-        }
-        const topicElement =
-            <div className="mx_RoomHeader_topic" ref={this._topic} title={topic} dir="auto">{ topic }</div>;
+        const topicElement = <RoomTopic room={this.props.room}>
+            {(topic, ref) => <div className="mx_RoomHeader_topic" ref={ref} title={topic} dir="auto">
+                { topic }
+            </div>}
+        </RoomTopic>;
 
         let roomAvatar;
         if (this.props.room) {
@@ -252,8 +228,26 @@ export default class RoomHeader extends React.Component {
                     title={_t("Search")} />;
         }
 
+        let voiceCallButton;
+        let videoCallButton;
+        if (this.props.inRoom && SettingsStore.getValue("showCallButtonsInComposer")) {
+            voiceCallButton =
+                <AccessibleTooltipButton
+                    className="mx_RoomHeader_button mx_RoomHeader_voiceCallButton"
+                    onClick={() => this.props.onCallPlaced(PlaceCallType.Voice)}
+                    title={_t("Voice call")} />;
+            videoCallButton =
+                <AccessibleTooltipButton
+                    className="mx_RoomHeader_button mx_RoomHeader_videoCallButton"
+                    onClick={(ev) => this.props.onCallPlaced(
+                        ev.shiftKey ? PlaceCallType.ScreenSharing : PlaceCallType.Video)}
+                    title={_t("Video call")} />;
+        }
+
         const rightRow =
             <div className="mx_RoomHeader_buttons">
+                { videoCallButton }
+                { voiceCallButton }
                 { pinnedEventsButton }
                 { forgetButton }
                 { appsButton }

src/components/views/rooms/RoomList.tsx

@@ -47,6 +47,9 @@ import { IconizedContextMenuOption, IconizedContextMenuOptionList } from "../con
 import AccessibleButton from "../elements/AccessibleButton";
 import { CommunityPrototypeStore } from "../../../stores/CommunityPrototypeStore";
 import CallHandler from "../../../CallHandler";
+import SpaceStore from "../../../stores/SpaceStore";
+import { showAddExistingRooms, showCreateNewRoom } from "../../../utils/space";
+import { EventType } from "matrix-js-sdk/src/@types/event";
 
 interface IProps {
     onKeyDown: (ev: React.KeyboardEvent) => void;
@@ -152,6 +155,50 @@ const TAG_AESTHETICS: ITagAestheticsMap = {
         defaultHidden: false,
         addRoomLabel: _td("Add room"),
         addRoomContextMenu: (onFinished: () => void) => {
+            if (SpaceStore.instance.activeSpace) {
+                const canAddRooms = SpaceStore.instance.activeSpace.currentState.maySendStateEvent(EventType.SpaceChild,
+                    MatrixClientPeg.get().getUserId());
+
+                return <IconizedContextMenuOptionList first>
+                    <IconizedContextMenuOption
+                        label={_t("Create new room")}
+                        iconClassName="mx_RoomList_iconPlus"
+                        onClick={(e) => {
+                            e.preventDefault();
+                            e.stopPropagation();
+                            onFinished();
+                            showCreateNewRoom(MatrixClientPeg.get(), SpaceStore.instance.activeSpace);
+                        }}
+                        disabled={!canAddRooms}
+                        tooltip={canAddRooms ? undefined
+                            : _t("You do not have permissions to create new rooms in this space")}
+                    />
+                    <IconizedContextMenuOption
+                        label={_t("Add existing room")}
+                        iconClassName="mx_RoomList_iconHash"
+                        onClick={(e) => {
+                            e.preventDefault();
+                            e.stopPropagation();
+                            onFinished();
+                            showAddExistingRooms(MatrixClientPeg.get(), SpaceStore.instance.activeSpace);
+                        }}
+                        disabled={!canAddRooms}
+                        tooltip={canAddRooms ? undefined
+                            : _t("You do not have permissions to add rooms to this space")}
+                    />
+                    <IconizedContextMenuOption
+                        label={_t("Explore space rooms")}
+                        iconClassName="mx_RoomList_iconExplore"
+                        onClick={(e) => {
+                            e.preventDefault();
+                            e.stopPropagation();
+                            onFinished();
+                            defaultDispatcher.fire(Action.ViewRoomDirectory);
+                        }}
+                    />
+                </IconizedContextMenuOptionList>;
+            }
+
             return <IconizedContextMenuOptionList first>
                 <IconizedContextMenuOption
                     label={_t("Create new room")}

src/components/views/rooms/SendMessageComposer.js

@@ -116,6 +116,7 @@ export default class SendMessageComposer extends React.Component {
         placeholder: PropTypes.string,
         permalinkCreator: PropTypes.object.isRequired,
         replyToEvent: PropTypes.object,
+        onChange: PropTypes.func,
     };
 
     static contextType = MatrixClientContext;
@@ -392,7 +393,9 @@ export default class SendMessageComposer extends React.Component {
         this._editorRef.clearUndoHistory();
         this._editorRef.focus();
         this._clearStoredEditorState();
-        dis.dispatch({action: "scroll_to_bottom"});
+        if (SettingsStore.getValue("scrollToBottomOnMessageSent")) {
+            dis.dispatch({action: "scroll_to_bottom"});
+        }
     }
 
     componentWillUnmount() {
@@ -525,10 +528,15 @@ export default class SendMessageComposer extends React.Component {
         }
     }
 
+    onChange = () => {
+        if (this.props.onChange) this.props.onChange(this.model);
+    }
+
     render() {
         return (
             <div className="mx_SendMessageComposer" onClick={this.focusComposer} onKeyDown={this._onKeyDown}>
                 <BasicMessageComposer
+                    onChange={this.onChange}
                     ref={this._setEditorRef}
                     model={this.model}
                     room={this.props.room}

src/components/views/rooms/ThirdPartyMemberInfo.js

@@ -23,6 +23,8 @@ import dis from "../../../dispatcher/dispatcher";
 import * as sdk from "../../../index";
 import Modal from "../../../Modal";
 import {isValid3pidInvite} from "../../../RoomInvite";
+import RoomAvatar from "../avatars/RoomAvatar";
+import RoomName from "../elements/RoomName";
 
 export default class ThirdPartyMemberInfo extends React.Component {
     static propTypes = {
@@ -32,14 +34,14 @@ export default class ThirdPartyMemberInfo extends React.Component {
     constructor(props) {
         super(props);
 
-        const room = MatrixClientPeg.get().getRoom(this.props.event.getRoomId());
-        const me = room.getMember(MatrixClientPeg.get().getUserId());
-        const powerLevels = room.currentState.getStateEvents("m.room.power_levels", "");
+        this.room = MatrixClientPeg.get().getRoom(this.props.event.getRoomId());
+        const me = this.room.getMember(MatrixClientPeg.get().getUserId());
+        const powerLevels = this.room.currentState.getStateEvents("m.room.power_levels", "");
 
         let kickLevel = powerLevels ? powerLevels.getContent().kick : 50;
         if (typeof(kickLevel) !== 'number') kickLevel = 50;
 
-        const sender = room.getMember(this.props.event.getSender());
+        const sender = this.room.getMember(this.props.event.getSender());
 
         this.state = {
             stateKey: this.props.event.getStateKey(),
@@ -119,9 +121,18 @@ export default class ThirdPartyMemberInfo extends React.Component {
             );
         }
 
+        let scopeHeader;
+        if (this.room.isSpaceRoom()) {
+            scopeHeader = <div className="mx_RightPanel_scopeHeader">
+                <RoomAvatar room={this.room} height={32} width={32} />
+                <RoomName room={this.room} />
+            </div>;
+        }
+
         // We shamelessly rip off the MemberInfo styles here.
         return (
             <div className="mx_MemberInfo" role="tabpanel">
+                { scopeHeader }
                 <div className="mx_MemberInfo_name">
                     <AccessibleButton className="mx_MemberInfo_cancel"
                         onClick={this.onCancel}

src/components/views/settings/SpellCheckSettings.tsx

@@ -0,0 +1,111 @@
+/*
+Copyright 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 from 'react';
+import SpellCheckLanguagesDropdown from "../../../components/views/elements/SpellCheckLanguagesDropdown";
+import AccessibleButton from "../../../components/views/elements/AccessibleButton";
+import {_t} from "../../../languageHandler";
+
+interface ExistingSpellCheckLanguageIProps {
+    language: string,
+    onRemoved(language: string),
+}
+
+interface SpellCheckLanguagesIProps {
+    languages: Array<string>,
+    onLanguagesChange(languages: Array<string>),
+}
+
+interface SpellCheckLanguagesIState {
+    newLanguage: string,
+}
+
+export class ExistingSpellCheckLanguage extends React.Component<ExistingSpellCheckLanguageIProps> {
+    _onRemove = (e) => {
+        e.stopPropagation();
+        e.preventDefault();
+
+        return this.props.onRemoved(this.props.language);
+    };
+
+    render() {
+        return (
+            <div className="mx_ExistingSpellCheckLanguage">
+                <span className="mx_ExistingSpellCheckLanguage_language">{this.props.language}</span>
+                <AccessibleButton onClick={this._onRemove} kind="danger_sm">
+                    {_t("Remove")}
+                </AccessibleButton>
+            </div>
+        );
+    }
+}
+
+export default class SpellCheckLanguages extends React.Component<SpellCheckLanguagesIProps, SpellCheckLanguagesIState> {
+    constructor(props) {
+        super(props);
+        this.state = {
+            newLanguage: "",
+        }
+    }
+
+    _onRemoved = (language) => {
+        const languages = this.props.languages.filter((e) => e !== language);
+        this.props.onLanguagesChange(languages);
+    };
+
+    _onAddClick = (e) => {
+        e.stopPropagation();
+        e.preventDefault();
+
+        const language = this.state.newLanguage;
+
+        if (!language) return;
+        if (this.props.languages.includes(language)) return;
+
+        this.props.languages.push(language)
+        this.props.onLanguagesChange(this.props.languages);
+    };
+
+    _onNewLanguageChange = (language: string) => {
+        if (this.state.newLanguage === language) return;
+        this.setState({newLanguage: language});
+    };
+
+    render() {
+        const existingSpellCheckLanguages = this.props.languages.map((e) => {
+            return <ExistingSpellCheckLanguage language={e} onRemoved={this._onRemoved} key={e} />;
+        });
+
+        const addButton = (
+            <AccessibleButton onClick={this._onAddClick} kind="primary">
+                {_t("Add")}
+            </AccessibleButton>
+        );
+
+        return (
+            <div className="mx_SpellCheckLanguages">
+                {existingSpellCheckLanguages}
+                <form onSubmit={this._onAddClick} noValidate={true}>
+                    <SpellCheckLanguagesDropdown
+                        className="mx_GeneralUserSettingsTab_spellCheckLanguageInput"
+                        value={this.state.newLanguage}
+                        onOptionChange={this._onNewLanguageChange} />
+                    {addButton}
+                </form>
+            </div>
+        );
+    }
+}

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

@@ -178,19 +178,23 @@ export default class EmailAddresses extends React.Component {
         e.preventDefault();
 
         this.setState({continueDisabled: true});
-        this.state.addTask.checkEmailLinkClicked().then(() => {
-            const email = this.state.newEmailAddress;
+        this.state.addTask.checkEmailLinkClicked().then(([finished]) => {
+            let newEmailAddress = this.state.newEmailAddress;
+            if (finished) {
+                const email = this.state.newEmailAddress;
+                const emails = [
+                    ...this.props.emails,
+                    { address: email, medium: "email" },
+                ];
+                this.props.onEmailsChange(emails);
+                newEmailAddress = "";
+            }
             this.setState({
                 addTask: null,
                 continueDisabled: false,
                 verifying: false,
-                newEmailAddress: "",
+                newEmailAddress,
             });
-            const emails = [
-                ...this.props.emails,
-                { address: email, medium: "email" },
-            ];
-            this.props.onEmailsChange(emails);
         }).catch((err) => {
             this.setState({continueDisabled: false});
             const ErrorDialog = sdk.getComponent("dialogs.ErrorDialog");

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

@@ -177,21 +177,25 @@ export default class PhoneNumbers extends React.Component {
         this.setState({continueDisabled: true});
         const token = this.state.newPhoneNumberCode;
         const address = this.state.verifyMsisdn;
-        this.state.addTask.haveMsisdnToken(token).then(() => {
+        this.state.addTask.haveMsisdnToken(token).then(([finished]) => {
+            let newPhoneNumber = this.state.newPhoneNumber;
+            if (finished) {
+                const msisdns = [
+                    ...this.props.msisdns,
+                    { address, medium: "msisdn" },
+                ];
+                this.props.onMsisdnsChange(msisdns);
+                newPhoneNumber = "";
+            }
             this.setState({
                 addTask: null,
                 continueDisabled: false,
                 verifying: false,
                 verifyMsisdn: "",
                 verifyError: null,
-                newPhoneNumber: "",
+                newPhoneNumber,
                 newPhoneNumberCode: "",
             });
-            const msisdns = [
-                ...this.props.msisdns,
-                { address, medium: "msisdn" },
-            ];
-            this.props.onMsisdnsChange(msisdns);
         }).catch((err) => {
             this.setState({continueDisabled: false});
             if (err.errcode !== 'M_THREEPID_AUTH_FAILED') {

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

@@ -28,15 +28,14 @@ import { FontWatcher } from "../../../../../settings/watchers/FontWatcher";
 import { RecheckThemePayload } from '../../../../../dispatcher/payloads/RecheckThemePayload';
 import { Action } from '../../../../../dispatcher/actions';
 import { IValidationResult, IFieldState } from '../../../elements/Validation';
-import StyledRadioButton from '../../../elements/StyledRadioButton';
 import StyledCheckbox from '../../../elements/StyledCheckbox';
 import SettingsFlag from '../../../elements/SettingsFlag';
 import Field from '../../../elements/Field';
 import EventTilePreview from '../../../elements/EventTilePreview';
 import StyledRadioGroup from "../../../elements/StyledRadioGroup";
-import classNames from 'classnames';
 import { SettingLevel } from "../../../../../settings/SettingLevel";
 import {UIFeature} from "../../../../../settings/UIFeature";
+import {Layout} from "../../../../../settings/Layout";
 
 interface IProps {
 }
@@ -62,7 +61,7 @@ interface IState extends IThemeState {
     useSystemFont: boolean;
     systemFont: string;
     showAdvanced: boolean;
-    useIRCLayout: boolean;
+    layout: Layout;
 }
 
 
@@ -83,7 +82,7 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
             useSystemFont: SettingsStore.getValue("useSystemFont"),
             systemFont: SettingsStore.getValue("systemFont"),
             showAdvanced: false,
-            useIRCLayout: SettingsStore.getValue("useIRCLayout"),
+            layout: SettingsStore.getValue("layout"),
         };
     }
 
@@ -213,15 +212,15 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
         this.setState({customThemeUrl: e.target.value});
     };
 
-    private onLayoutChange = (e: React.ChangeEvent<HTMLInputElement>): void => {
-        const val = e.target.value === "true";
-
-        this.setState({
-            useIRCLayout: val,
-        });
-
-        SettingsStore.setValue("useIRCLayout", null, SettingLevel.DEVICE, val);
-    };
+    private onIRCLayoutChange = (enabled: boolean) => {
+        if (enabled) {
+            this.setState({layout: Layout.IRC});
+            SettingsStore.setValue("layout", null, SettingLevel.DEVICE, Layout.IRC);
+        } else {
+            this.setState({layout: Layout.Group});
+            SettingsStore.setValue("layout", null, SettingLevel.DEVICE, Layout.Group);
+        }
+    }
 
     private renderThemeSection() {
         const themeWatcher = new ThemeWatcher();
@@ -306,7 +305,7 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
             <EventTilePreview
                 className="mx_AppearanceUserSettingsTab_fontSlider_preview"
                 message={this.MESSAGE_PREVIEW_TEXT}
-                useIRCLayout={this.state.useIRCLayout}
+                layout={this.state.layout}
             />
             <div className="mx_AppearanceUserSettingsTab_fontSlider">
                 <div className="mx_AppearanceUserSettingsTab_fontSlider_smallText">Aa</div>
@@ -342,50 +341,6 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
         </div>;
     }
 
-    private renderLayoutSection = () => {
-        return <div className="mx_SettingsTab_section mx_AppearanceUserSettingsTab_Layout">
-            <span className="mx_SettingsTab_subheading">{_t("Message layout")}</span>
-
-            <div className="mx_AppearanceUserSettingsTab_Layout_RadioButtons">
-                <div className={classNames("mx_AppearanceUserSettingsTab_Layout_RadioButton", {
-                    mx_AppearanceUserSettingsTab_Layout_RadioButton_selected: this.state.useIRCLayout,
-                })}>
-                    <EventTilePreview
-                        className="mx_AppearanceUserSettingsTab_Layout_RadioButton_preview"
-                        message={this.MESSAGE_PREVIEW_TEXT}
-                        useIRCLayout={true}
-                    />
-                    <StyledRadioButton
-                        name="layout"
-                        value="true"
-                        checked={this.state.useIRCLayout}
-                        onChange={this.onLayoutChange}
-                    >
-                        {_t("Compact")}
-                    </StyledRadioButton>
-                </div>
-                <div className="mx_AppearanceUserSettingsTab_spacer" />
-                <div className={classNames("mx_AppearanceUserSettingsTab_Layout_RadioButton", {
-                    mx_AppearanceUserSettingsTab_Layout_RadioButton_selected: !this.state.useIRCLayout,
-                })}>
-                    <EventTilePreview
-                        className="mx_AppearanceUserSettingsTab_Layout_RadioButton_preview"
-                        message={this.MESSAGE_PREVIEW_TEXT}
-                        useIRCLayout={false}
-                    />
-                    <StyledRadioButton
-                        name="layout"
-                        value="false"
-                        checked={!this.state.useIRCLayout}
-                        onChange={this.onLayoutChange}
-                    >
-                        {_t("Modern")}
-                    </StyledRadioButton>
-                </div>
-            </div>
-        </div>;
-    };
-
     private renderAdvancedSection() {
         if (!SettingsStore.getValue(UIFeature.AdvancedSettings)) return null;
 
@@ -409,14 +364,15 @@ export default class AppearanceUserSettingsTab extends React.Component<IProps, I
                     name="useCompactLayout"
                     level={SettingLevel.DEVICE}
                     useCheckbox={true}
-                    disabled={this.state.useIRCLayout}
-                />
-                <SettingsFlag
-                    name="useIRCLayout"
-                    level={SettingLevel.DEVICE}
-                    useCheckbox={true}
-                    onChange={(checked) => this.setState({useIRCLayout: checked})}
+                    disabled={this.state.layout == Layout.IRC}
                 />
+                <StyledCheckbox
+                    checked={this.state.layout == Layout.IRC}
+                    onChange={(ev) => this.onIRCLayoutChange(ev.target.checked)}
+                >
+                    {_t("Enable experimental, compact IRC style layout")}
+                </StyledCheckbox>
+
                 <SettingsFlag
                     name="useSystemFont"
                     level={SettingLevel.DEVICE}

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

@@ -22,6 +22,7 @@ import ProfileSettings from "../../ProfileSettings";
 import * as languageHandler from "../../../../../languageHandler";
 import SettingsStore from "../../../../../settings/SettingsStore";
 import LanguageDropdown from "../../../elements/LanguageDropdown";
+import SpellCheckSettings from "../../SpellCheckSettings";
 import AccessibleButton from "../../../elements/AccessibleButton";
 import DeactivateAccountDialog from "../../../dialogs/DeactivateAccountDialog";
 import PropTypes from "prop-types";
@@ -49,6 +50,7 @@ export default class GeneralUserSettingsTab extends React.Component {
 
         this.state = {
             language: languageHandler.getCurrentLanguage(),
+            spellCheckLanguages: [],
             haveIdServer: Boolean(MatrixClientPeg.get().getIdentityServerUrl()),
             serverSupportsSeparateAddAndBind: null,
             idServerHasUnsignedTerms: false,
@@ -85,6 +87,15 @@ export default class GeneralUserSettingsTab extends React.Component {
         this._getThreepidState();
     }
 
+    async componentDidMount() {
+        const plaf = PlatformPeg.get();
+        if (plaf) {
+            this.setState({
+                spellCheckLanguages: await plaf.getSpellCheckLanguages(),
+            });
+        }
+    }
+
     componentWillUnmount() {
         dis.unregister(this.dispatcherRef);
     }
@@ -182,6 +193,15 @@ export default class GeneralUserSettingsTab extends React.Component {
         PlatformPeg.get().reload();
     };
 
+    _onSpellCheckLanguagesChange = (languages) => {
+        this.setState({spellCheckLanguages: languages});
+
+        const plaf = PlatformPeg.get();
+        if (plaf) {
+            plaf.setSpellCheckLanguages(languages);
+        }
+    };
+
     _onPasswordChangeError = (err) => {
         // TODO: Figure out a design that doesn't involve replacing the current dialog
         let errMsg = err.error || "";
@@ -303,6 +323,16 @@ export default class GeneralUserSettingsTab extends React.Component {
         );
     }
 
+    _renderSpellCheckSection() {
+        return (
+            <div className="mx_SettingsTab_section">
+                <span className="mx_SettingsTab_subheading">{_t("Spell check dictionaries")}</span>
+                <SpellCheckSettings languages={this.state.spellCheckLanguages}
+                                    onLanguagesChange={this._onSpellCheckLanguagesChange} />
+            </div>
+        );
+    }
+
     _renderDiscoverySection() {
         const SetIdServer = sdk.getComponent("views.settings.SetIdServer");
 
@@ -381,6 +411,9 @@ export default class GeneralUserSettingsTab extends React.Component {
     }
 
     render() {
+        const plaf = PlatformPeg.get();
+        const supportsMultiLanguageSpellCheck = plaf.supportsMultiLanguageSpellCheck();
+
         const discoWarning = this.state.requiredPolicyInfo.hasTerms
             ? <img className='mx_GeneralUserSettingsTab_warningIcon'
                 src={require("../../../../../../res/img/feather-customised/warning-triangle.svg")}
@@ -409,6 +442,7 @@ export default class GeneralUserSettingsTab extends React.Component {
                 {this._renderProfileSection()}
                 {this._renderAccountSection()}
                 {this._renderLanguageSection()}
+                {supportsMultiLanguageSpellCheck ? this._renderSpellCheckSection() : null}
                 { discoverySection }
                 {this._renderIntegrationManagerSection() /* Has its own title */}
                 { accountManagementSection }

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

@@ -48,6 +48,7 @@ export default class PreferencesUserSettingsTab extends React.Component {
         'showRedactions',
         'enableSyntaxHighlightLanguageDetection',
         'expandCodeByDefault',
+        'scrollToBottomOnMessageSent',
         'showCodeLineNumbers',
         'showJoinLeaves',
         'showAvatarChanges',

src/components/views/spaces/SpaceBasicSettings.tsx

@@ -0,0 +1,120 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useRef, useState} from "react";
+
+import {_t} from "../../../languageHandler";
+import AccessibleButton from "../elements/AccessibleButton";
+import Field from "../elements/Field";
+
+interface IProps {
+    avatarUrl?: string;
+    avatarDisabled?: boolean;
+    name?: string,
+    nameDisabled?: boolean;
+    topic?: string;
+    topicDisabled?: boolean;
+    setAvatar(avatar: File): void;
+    setName(name: string): void;
+    setTopic(topic: string): void;
+}
+
+const SpaceBasicSettings = ({
+    avatarUrl,
+    avatarDisabled = false,
+    setAvatar,
+    name = "",
+    nameDisabled = false,
+    setName,
+    topic = "",
+    topicDisabled = false,
+    setTopic,
+}: IProps) => {
+    const avatarUploadRef = useRef<HTMLInputElement>();
+    const [avatar, setAvatarDataUrl] = useState(avatarUrl); // avatar data url cache
+
+    let avatarSection;
+    if (avatarDisabled) {
+        if (avatar) {
+            avatarSection = <img className="mx_SpaceBasicSettings_avatar" src={avatar} alt="" />;
+        } else {
+            avatarSection = <div className="mx_SpaceBasicSettings_avatar" />;
+        }
+    } else {
+        if (avatar) {
+            avatarSection = <React.Fragment>
+                <AccessibleButton
+                    className="mx_SpaceBasicSettings_avatar"
+                    onClick={() => avatarUploadRef.current?.click()}
+                    element="img"
+                    src={avatar}
+                    alt=""
+                />
+                <AccessibleButton onClick={() => {
+                    avatarUploadRef.current.value = "";
+                    setAvatarDataUrl(undefined);
+                    setAvatar(undefined);
+                }} kind="link" className="mx_SpaceBasicSettings_avatar_remove">
+                    { _t("Delete") }
+                </AccessibleButton>
+            </React.Fragment>;
+        } else {
+            avatarSection = <React.Fragment>
+                <div className="mx_SpaceBasicSettings_avatar" onClick={() => avatarUploadRef.current?.click()} />
+                <AccessibleButton onClick={() => avatarUploadRef.current?.click()} kind="link">
+                    { _t("Upload") }
+                </AccessibleButton>
+            </React.Fragment>;
+        }
+    }
+
+    return <div className="mx_SpaceBasicSettings">
+        <div className="mx_SpaceBasicSettings_avatarContainer">
+            { avatarSection }
+            <input type="file" ref={avatarUploadRef} onChange={(e) => {
+                if (!e.target.files?.length) return;
+                const file = e.target.files[0];
+                setAvatar(file);
+                const reader = new FileReader();
+                reader.onload = (ev) => {
+                    setAvatarDataUrl(ev.target.result as string);
+                };
+                reader.readAsDataURL(file);
+            }} accept="image/*" />
+        </div>
+
+        <Field
+            name="spaceName"
+            label={_t("Name")}
+            autoFocus={true}
+            value={name}
+            onChange={ev => setName(ev.target.value)}
+            disabled={nameDisabled}
+        />
+
+        <Field
+            name="spaceTopic"
+            element="textarea"
+            label={_t("Description")}
+            value={topic}
+            onChange={ev => setTopic(ev.target.value)}
+            rows={3}
+            disabled={topicDisabled}
+        />
+    </div>;
+};
+
+export default SpaceBasicSettings;

src/components/views/spaces/SpaceCreateMenu.tsx

@@ -0,0 +1,175 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useContext, useState} from "react";
+import classNames from "classnames";
+import {EventType, RoomType, RoomCreateTypeField} from "matrix-js-sdk/src/@types/event";
+
+import {_t} from "../../../languageHandler";
+import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
+import {ChevronFace, ContextMenu} from "../../structures/ContextMenu";
+import FormButton from "../elements/FormButton";
+import createRoom, {IStateEvent, Preset} from "../../../createRoom";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import SpaceBasicSettings from "./SpaceBasicSettings";
+import AccessibleButton from "../elements/AccessibleButton";
+import FocusLock from "react-focus-lock";
+
+const SpaceCreateMenuType = ({ title, description, className, onClick }) => {
+    return (
+        <AccessibleButton className={classNames("mx_SpaceCreateMenuType", className)} onClick={onClick}>
+            <h3>{ title }</h3>
+            <span>{ description }</span>
+        </AccessibleButton>
+    );
+};
+
+enum Visibility {
+    Public,
+    Private,
+}
+
+const SpaceCreateMenu = ({ onFinished }) => {
+    const cli = useContext(MatrixClientContext);
+    const [visibility, setVisibility] = useState<Visibility>(null);
+    const [name, setName] = useState("");
+    const [avatar, setAvatar] = useState<File>(null);
+    const [topic, setTopic] = useState<string>("");
+    const [busy, setBusy] = useState<boolean>(false);
+
+    const onSpaceCreateClick = async () => {
+        if (busy) return;
+        setBusy(true);
+        const initialState: IStateEvent[] = [
+            {
+                type: EventType.RoomHistoryVisibility,
+                content: {
+                    "history_visibility": visibility === Visibility.Public ? "world_readable" : "invited",
+                },
+            },
+        ];
+        if (avatar) {
+            const url = await cli.uploadContent(avatar);
+
+            initialState.push({
+                type: EventType.RoomAvatar,
+                content: { url },
+            });
+        }
+        if (topic) {
+            initialState.push({
+                type: EventType.RoomTopic,
+                content: { topic },
+            });
+        }
+
+        try {
+            await createRoom({
+                createOpts: {
+                    preset: visibility === Visibility.Public ? Preset.PublicChat : Preset.PrivateChat,
+                    name,
+                    creation_content: {
+                        // Based on MSC1840
+                        [RoomCreateTypeField]: RoomType.Space,
+                    },
+                    initial_state: initialState,
+                    power_level_content_override: {
+                        // Only allow Admins to write to the timeline to prevent hidden sync spam
+                        events_default: 100,
+                    },
+                },
+                spinner: false,
+                encryption: false,
+                andView: true,
+                inlineErrors: true,
+            });
+
+            onFinished();
+        } catch (e) {
+            console.error(e);
+        }
+    };
+
+    let body;
+    if (visibility === null) {
+        body = <React.Fragment>
+            <h2>{ _t("Create a space") }</h2>
+            <p>{ _t("Organise rooms into spaces, for just you or anyone") }</p>
+
+            <SpaceCreateMenuType
+                title={_t("Public")}
+                description={_t("Open space for anyone, best for communities")}
+                className="mx_SpaceCreateMenuType_public"
+                onClick={() => setVisibility(Visibility.Public)}
+            />
+            <SpaceCreateMenuType
+                title={_t("Private")}
+                description={_t("Invite only space, best for yourself or teams")}
+                className="mx_SpaceCreateMenuType_private"
+                onClick={() => setVisibility(Visibility.Private)}
+            />
+
+            {/*<p>{ _t("Looking to join an existing space?") }</p>*/}
+        </React.Fragment>;
+    } else {
+        body = <React.Fragment>
+            <AccessibleTooltipButton
+                className="mx_SpaceCreateMenu_back"
+                onClick={() => setVisibility(null)}
+                title={_t("Go back")}
+            />
+
+            <h2>
+                {
+                    visibility === Visibility.Public
+                        ? _t("Personalise your public space")
+                        : _t("Personalise your private space")
+                }
+            </h2>
+            <p>
+                {
+                    _t("Give it a photo, name and description to help you identify it.")
+                } {
+                    _t("You can change these at any point.")
+                }
+            </p>
+
+            <SpaceBasicSettings setAvatar={setAvatar} name={name} setName={setName} topic={topic} setTopic={setTopic} />
+
+            <FormButton
+                label={busy ? _t("Creating...") : _t("Create")}
+                onClick={onSpaceCreateClick}
+                disabled={!name && !busy}
+            />
+        </React.Fragment>;
+    }
+
+    return <ContextMenu
+        left={72}
+        top={62}
+        chevronOffset={0}
+        chevronFace={ChevronFace.None}
+        onFinished={onFinished}
+        wrapperClassName="mx_SpaceCreateMenu_wrapper"
+        managed={false}
+    >
+        <FocusLock returnFocus={true}>
+            { body }
+        </FocusLock>
+    </ContextMenu>;
+}
+
+export default SpaceCreateMenu;

src/components/views/spaces/SpacePanel.tsx

@@ -0,0 +1,238 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useState} from "react";
+import classNames from "classnames";
+import {Room} from "matrix-js-sdk/src/models/room";
+
+import {_t} from "../../../languageHandler";
+import RoomAvatar from "../avatars/RoomAvatar";
+import {useContextMenu} from "../../structures/ContextMenu";
+import SpaceCreateMenu from "./SpaceCreateMenu";
+import {SpaceItem} from "./SpaceTreeLevel";
+import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
+import {useEventEmitter} from "../../../hooks/useEventEmitter";
+import SpaceStore, {HOME_SPACE, UPDATE_SELECTED_SPACE, UPDATE_TOP_LEVEL_SPACES} from "../../../stores/SpaceStore";
+import AutoHideScrollbar from "../../structures/AutoHideScrollbar";
+import {SpaceNotificationState} from "../../../stores/notifications/SpaceNotificationState";
+import NotificationBadge from "../rooms/NotificationBadge";
+import {
+    RovingAccessibleButton,
+    RovingAccessibleTooltipButton,
+    RovingTabIndexProvider,
+} from "../../../accessibility/RovingTabIndex";
+import {Key} from "../../../Keyboard";
+
+interface IButtonProps {
+    space?: Room;
+    className?: string;
+    selected?: boolean;
+    tooltip?: string;
+    notificationState?: SpaceNotificationState;
+    isNarrow?: boolean;
+    onClick(): void;
+}
+
+const SpaceButton: React.FC<IButtonProps> = ({
+    space,
+    className,
+    selected,
+    onClick,
+    tooltip,
+    notificationState,
+    isNarrow,
+    children,
+}) => {
+    const classes = classNames("mx_SpaceButton", className, {
+        mx_SpaceButton_active: selected,
+        mx_SpaceButton_narrow: isNarrow,
+    });
+
+    let avatar = <div className="mx_SpaceButton_avatarPlaceholder"><div className="mx_SpaceButton_icon" /></div>;
+    if (space) {
+        avatar = <RoomAvatar width={32} height={32} room={space} />;
+    }
+
+    let notifBadge;
+    if (notificationState) {
+        notifBadge = <div className="mx_SpacePanel_badgeContainer">
+            <NotificationBadge forceCount={false} notification={notificationState} />
+        </div>;
+    }
+
+    let button;
+    if (isNarrow) {
+        button = (
+            <RovingAccessibleTooltipButton className={classes} title={tooltip} onClick={onClick} role="treeitem">
+                <div className="mx_SpaceButton_selectionWrapper">
+                    { avatar }
+                    { notifBadge }
+                    { children }
+                </div>
+            </RovingAccessibleTooltipButton>
+        );
+    } else {
+        button = (
+            <RovingAccessibleButton className={classes} onClick={onClick} role="treeitem">
+                <div className="mx_SpaceButton_selectionWrapper">
+                    { avatar }
+                    <span className="mx_SpaceButton_name">{ tooltip }</span>
+                    { notifBadge }
+                    { children }
+                </div>
+            </RovingAccessibleButton>
+        );
+    }
+
+    return <li className={classNames({
+        "mx_SpaceItem": true,
+        "collapsed": isNarrow,
+    })}>
+        { button }
+    </li>;
+}
+
+const useSpaces = (): [Room[], Room | null] => {
+    const [spaces, setSpaces] = useState<Room[]>(SpaceStore.instance.spacePanelSpaces);
+    useEventEmitter(SpaceStore.instance, UPDATE_TOP_LEVEL_SPACES, setSpaces);
+    const [activeSpace, setActiveSpace] = useState<Room>(SpaceStore.instance.activeSpace);
+    useEventEmitter(SpaceStore.instance, UPDATE_SELECTED_SPACE, setActiveSpace);
+    return [spaces, activeSpace];
+};
+
+const SpacePanel = () => {
+    // We don't need the handle as we position the menu in a constant location
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars
+    const [menuDisplayed, handle, openMenu, closeMenu] = useContextMenu<void>();
+    const [spaces, activeSpace] = useSpaces();
+    const [isPanelCollapsed, setPanelCollapsed] = useState(true);
+
+    const newClasses = classNames("mx_SpaceButton_new", {
+        mx_SpaceButton_newCancel: menuDisplayed,
+    });
+
+    let contextMenu = null;
+    if (menuDisplayed) {
+        contextMenu = <SpaceCreateMenu onFinished={closeMenu} />;
+    }
+
+    const onKeyDown = (ev: React.KeyboardEvent) => {
+        let handled = true;
+
+        switch (ev.key) {
+            case Key.ARROW_UP:
+                onMoveFocus(ev.target as Element, true);
+                break;
+            case Key.ARROW_DOWN:
+                onMoveFocus(ev.target as Element, false);
+                break;
+            default:
+                handled = false;
+        }
+
+        if (handled) {
+            // consume all other keys in context menu
+            ev.stopPropagation();
+            ev.preventDefault();
+        }
+    };
+
+    const onMoveFocus = (element: Element, up: boolean) => {
+        let descending = false; // are we currently descending or ascending through the DOM tree?
+        let classes: DOMTokenList;
+
+        do {
+            const child = up ? element.lastElementChild : element.firstElementChild;
+            const sibling = up ? element.previousElementSibling : element.nextElementSibling;
+
+            if (descending) {
+                if (child) {
+                    element = child;
+                } else if (sibling) {
+                    element = sibling;
+                } else {
+                    descending = false;
+                    element = element.parentElement;
+                }
+            } else {
+                if (sibling) {
+                    element = sibling;
+                    descending = true;
+                } else {
+                    element = element.parentElement;
+                }
+            }
+
+            if (element) {
+                if (element.classList.contains("mx_ContextualMenu")) { // we hit the top
+                    element = up ? element.lastElementChild : element.firstElementChild;
+                    descending = true;
+                }
+                classes = element.classList;
+            }
+        } while (element && !classes.contains("mx_SpaceButton"));
+
+        if (element) {
+            (element as HTMLElement).focus();
+        }
+    };
+
+    const activeSpaces = activeSpace ? [activeSpace] : [];
+    const expandCollapseButtonTitle = isPanelCollapsed ? _t("Expand space panel") : _t("Collapse space panel");
+    // TODO drag and drop for re-arranging order
+    return <RovingTabIndexProvider handleHomeEnd={true} onKeyDown={onKeyDown}>
+        {({onKeyDownHandler}) => (
+            <ul
+                className={classNames("mx_SpacePanel", { collapsed: isPanelCollapsed })}
+                onKeyDown={onKeyDownHandler}
+            >
+                <AutoHideScrollbar className="mx_SpacePanel_spaceTreeWrapper">
+                    <div className="mx_SpaceTreeLevel">
+                        <SpaceButton
+                            className="mx_SpaceButton_home"
+                            onClick={() => SpaceStore.instance.setActiveSpace(null)}
+                            selected={!activeSpace}
+                            tooltip={_t("Home")}
+                            notificationState={SpaceStore.instance.getNotificationState(HOME_SPACE)}
+                            isNarrow={isPanelCollapsed}
+                        />
+                        { spaces.map(s => <SpaceItem
+                            key={s.roomId}
+                            space={s}
+                            activeSpaces={activeSpaces}
+                            isPanelCollapsed={isPanelCollapsed}
+                            onExpand={() => setPanelCollapsed(false)}
+                        />) }
+                    </div>
+                    <SpaceButton
+                        className={newClasses}
+                        tooltip={menuDisplayed ? _t("Cancel") : _t("Create a space")}
+                        onClick={menuDisplayed ? closeMenu : openMenu}
+                        isNarrow={isPanelCollapsed}
+                    />
+                </AutoHideScrollbar>
+                <AccessibleTooltipButton
+                    className={classNames("mx_SpacePanel_toggleCollapse", {expanded: !isPanelCollapsed})}
+                    onClick={evt => setPanelCollapsed(!isPanelCollapsed)}
+                    title={expandCollapseButtonTitle}
+                />
+                { contextMenu }
+            </ul>
+        )}
+    </RovingTabIndexProvider>
+};
+
+export default SpacePanel;

src/components/views/spaces/SpacePublicShare.tsx

@@ -0,0 +1,65 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, {useState} from "react";
+import {Room} from "matrix-js-sdk/src/models/room";
+
+import {_t} from "../../../languageHandler";
+import AccessibleButton from "../elements/AccessibleButton";
+import {copyPlaintext} from "../../../utils/strings";
+import {sleep} from "../../../utils/promise";
+import {RoomPermalinkCreator} from "../../../utils/permalinks/Permalinks";
+import {showRoomInviteDialog} from "../../../RoomInvite";
+
+interface IProps {
+    space: Room;
+    onFinished(): void;
+}
+
+const SpacePublicShare = ({ space, onFinished }: IProps) => {
+    const [copiedText, setCopiedText] = useState(_t("Click to copy"));
+
+    return <div className="mx_SpacePublicShare">
+        <AccessibleButton
+            className="mx_SpacePublicShare_shareButton"
+            onClick={async () => {
+                const permalinkCreator = new RoomPermalinkCreator(space);
+                permalinkCreator.load();
+                const success = await copyPlaintext(permalinkCreator.forRoom());
+                const text = success ? _t("Copied!") : _t("Failed to copy");
+                setCopiedText(text);
+                await sleep(10);
+                if (copiedText === text) { // if the text hasn't changed by another click then clear it after some time
+                    setCopiedText(_t("Click to copy"));
+                }
+            }}
+        >
+            { _t("Share invite link") }
+            <span>{ copiedText }</span>
+        </AccessibleButton>
+        <AccessibleButton
+            className="mx_SpacePublicShare_inviteButton"
+            onClick={() => {
+                showRoomInviteDialog(space.roomId);
+                onFinished();
+            }}
+        >
+            { _t("Invite by email or username") }
+        </AccessibleButton>
+    </div>;
+};
+
+export default SpacePublicShare;

src/components/views/spaces/SpaceTreeLevel.tsx

@@ -0,0 +1,405 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from "react";
+import classNames from "classnames";
+import {Room} from "matrix-js-sdk/src/models/room";
+
+import RoomAvatar from "../avatars/RoomAvatar";
+import SpaceStore from "../../../stores/SpaceStore";
+import NotificationBadge from "../rooms/NotificationBadge";
+import {RovingAccessibleButton} from "../../../accessibility/roving/RovingAccessibleButton";
+import {RovingAccessibleTooltipButton} from "../../../accessibility/roving/RovingAccessibleTooltipButton";
+import IconizedContextMenu, {
+    IconizedContextMenuOption,
+    IconizedContextMenuOptionList,
+} from "../context_menus/IconizedContextMenu";
+import {_t} from "../../../languageHandler";
+import {ContextMenuTooltipButton} from "../../../accessibility/context_menu/ContextMenuTooltipButton";
+import {toRightOf} from "../../structures/ContextMenu";
+import {shouldShowSpaceSettings, showCreateNewRoom, showSpaceSettings} from "../../../utils/space";
+import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import {ButtonEvent} from "../elements/AccessibleButton";
+import defaultDispatcher from "../../../dispatcher/dispatcher";
+import Modal from "../../../Modal";
+import SpacePublicShare from "./SpacePublicShare";
+import {Action} from "../../../dispatcher/actions";
+import RoomViewStore from "../../../stores/RoomViewStore";
+import {SetRightPanelPhasePayload} from "../../../dispatcher/payloads/SetRightPanelPhasePayload";
+import {RightPanelPhases} from "../../../stores/RightPanelStorePhases";
+import {showRoomInviteDialog} from "../../../RoomInvite";
+import InfoDialog from "../dialogs/InfoDialog";
+import {EventType} from "matrix-js-sdk/src/@types/event";
+import SpaceRoomDirectory from "../../structures/SpaceRoomDirectory";
+
+interface IItemProps {
+    space?: Room;
+    activeSpaces: Room[];
+    isNested?: boolean;
+    isPanelCollapsed?: boolean;
+    onExpand?: Function;
+}
+
+interface IItemState {
+    collapsed: boolean;
+    contextMenuPosition: Pick<DOMRect, "right" | "top" | "height">;
+}
+
+export class SpaceItem extends React.PureComponent<IItemProps, IItemState> {
+    static contextType = MatrixClientContext;
+
+    constructor(props) {
+        super(props);
+
+        this.state = {
+            collapsed: !props.isNested,   // default to collapsed for root items
+            contextMenuPosition: null,
+        };
+    }
+
+    private toggleCollapse(evt) {
+        if (this.props.onExpand && this.state.collapsed) {
+            this.props.onExpand();
+        }
+        this.setState({collapsed: !this.state.collapsed});
+        // don't bubble up so encapsulating button for space
+        // doesn't get triggered
+        evt.stopPropagation();
+    }
+
+    private onContextMenu = (ev: React.MouseEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+        this.setState({
+            contextMenuPosition: {
+                right: ev.clientX,
+                top: ev.clientY,
+                height: 0,
+            },
+        });
+    }
+
+    private onClick = (ev: React.MouseEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+        SpaceStore.instance.setActiveSpace(this.props.space);
+    };
+
+    private onMenuOpenClick = (ev: React.MouseEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+        const target = ev.target as HTMLButtonElement;
+        this.setState({contextMenuPosition: target.getBoundingClientRect()});
+    };
+
+    private onMenuClose = () => {
+        this.setState({contextMenuPosition: null});
+    };
+
+    private onHomeClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        defaultDispatcher.dispatch({
+            action: "view_room",
+            room_id: this.props.space.roomId,
+        });
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onInviteClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        if (this.props.space.getJoinRule() === "public") {
+            const modal = Modal.createTrackedDialog("Space Invite", "User Menu", InfoDialog, {
+                title: _t("Invite members"),
+                description: <React.Fragment>
+                    <span>{ _t("Share your public space") }</span>
+                    <SpacePublicShare space={this.props.space} onFinished={() => modal.close()} />
+                </React.Fragment>,
+                fixedWidth: false,
+                button: false,
+                className: "mx_SpacePanel_sharePublicSpace",
+                hasCloseButton: true,
+            });
+        } else {
+            showRoomInviteDialog(this.props.space.roomId);
+        }
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onSettingsClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        showSpaceSettings(this.context, this.props.space);
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onLeaveClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        defaultDispatcher.dispatch({
+            action: "leave_room",
+            room_id: this.props.space.roomId,
+        });
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onNewRoomClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        showCreateNewRoom(this.context, this.props.space);
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onMembersClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        if (!RoomViewStore.getRoomId()) {
+            defaultDispatcher.dispatch({
+                action: "view_room",
+                room_id: this.props.space.roomId,
+            }, true);
+        }
+
+        defaultDispatcher.dispatch<SetRightPanelPhasePayload>({
+            action: Action.SetRightPanelPhase,
+            phase: RightPanelPhases.SpaceMemberList,
+            refireParams: { space: this.props.space },
+        });
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private onExploreRoomsClick = (ev: ButtonEvent) => {
+        ev.preventDefault();
+        ev.stopPropagation();
+
+        Modal.createTrackedDialog("Space room directory", "Space panel", SpaceRoomDirectory, {
+            space: this.props.space,
+        }, "mx_SpaceRoomDirectory_dialogWrapper", false, true);
+        this.setState({contextMenuPosition: null}); // also close the menu
+    };
+
+    private renderContextMenu(): React.ReactElement {
+        let contextMenu = null;
+        if (this.state.contextMenuPosition) {
+            const userId = this.context.getUserId();
+
+            let inviteOption;
+            if (this.props.space.canInvite(userId)) {
+                inviteOption = (
+                    <IconizedContextMenuOption
+                        className="mx_SpacePanel_contextMenu_inviteButton"
+                        iconClassName="mx_SpacePanel_iconInvite"
+                        label={_t("Invite people")}
+                        onClick={this.onInviteClick}
+                    />
+                );
+            }
+
+            let settingsOption;
+            let leaveSection;
+            if (shouldShowSpaceSettings(this.context, this.props.space)) {
+                settingsOption = (
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconSettings"
+                        label={_t("Settings")}
+                        onClick={this.onSettingsClick}
+                    />
+                );
+            } else {
+                leaveSection = <IconizedContextMenuOptionList red first>
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconLeave"
+                        label={_t("Leave space")}
+                        onClick={this.onLeaveClick}
+                    />
+                </IconizedContextMenuOptionList>;
+            }
+
+            let newRoomOption;
+            if (this.props.space.currentState.maySendStateEvent(EventType.SpaceChild, userId)) {
+                newRoomOption = (
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconPlus"
+                        label={_t("New room")}
+                        onClick={this.onNewRoomClick}
+                    />
+                );
+            }
+
+            contextMenu = <IconizedContextMenu
+                {...toRightOf(this.state.contextMenuPosition, 0)}
+                onFinished={this.onMenuClose}
+                className="mx_SpacePanel_contextMenu"
+                compact
+            >
+                <div className="mx_SpacePanel_contextMenu_header">
+                    { this.props.space.name }
+                </div>
+                <IconizedContextMenuOptionList first>
+                    { inviteOption }
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconHome"
+                        label={_t("Space Home")}
+                        onClick={this.onHomeClick}
+                    />
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconMembers"
+                        label={_t("Members")}
+                        onClick={this.onMembersClick}
+                    />
+                    { settingsOption }
+                    <IconizedContextMenuOption
+                        iconClassName="mx_SpacePanel_iconExplore"
+                        label={_t("Explore rooms")}
+                        onClick={this.onExploreRoomsClick}
+                    />
+                    { newRoomOption }
+                </IconizedContextMenuOptionList>
+                { leaveSection }
+            </IconizedContextMenu>;
+        }
+
+        return (
+            <React.Fragment>
+                <ContextMenuTooltipButton
+                    className="mx_SpaceButton_menuButton"
+                    onClick={this.onMenuOpenClick}
+                    title={_t("Space options")}
+                    isExpanded={!!this.state.contextMenuPosition}
+                />
+                { contextMenu }
+            </React.Fragment>
+        );
+    }
+
+    render() {
+        const {space, activeSpaces, isNested} = this.props;
+
+        const forceCollapsed = this.props.isPanelCollapsed;
+        const isNarrow = this.props.isPanelCollapsed;
+        const collapsed = this.state.collapsed || forceCollapsed;
+
+        const childSpaces = SpaceStore.instance.getChildSpaces(space.roomId);
+        const isActive = activeSpaces.includes(space);
+        const itemClasses = classNames({
+            "mx_SpaceItem": true,
+            "collapsed": collapsed,
+            "hasSubSpaces": childSpaces && childSpaces.length,
+        });
+        const classes = classNames("mx_SpaceButton", {
+            mx_SpaceButton_active: isActive,
+            mx_SpaceButton_hasMenuOpen: !!this.state.contextMenuPosition,
+            mx_SpaceButton_narrow: isNarrow,
+        });
+        const notificationState = SpaceStore.instance.getNotificationState(space.roomId);
+        const childItems = childSpaces && !collapsed ? <SpaceTreeLevel
+            spaces={childSpaces}
+            activeSpaces={activeSpaces}
+            isNested={true}
+        /> : null;
+        let notifBadge;
+        if (notificationState) {
+            notifBadge = <div className="mx_SpacePanel_badgeContainer">
+                <NotificationBadge forceCount={false} notification={notificationState} />
+            </div>;
+        }
+
+        const avatarSize = isNested ? 24 : 32;
+
+        const toggleCollapseButton = childSpaces && childSpaces.length ?
+            <button
+                className="mx_SpaceButton_toggleCollapse"
+                onClick={evt => this.toggleCollapse(evt)}
+            /> : null;
+
+        let button;
+        if (isNarrow) {
+            button = (
+                <RovingAccessibleTooltipButton
+                    className={classes}
+                    title={space.name}
+                    onClick={this.onClick}
+                    onContextMenu={this.onContextMenu}
+                    forceHide={!!this.state.contextMenuPosition}
+                    role="treeitem"
+                >
+                    { toggleCollapseButton }
+                    <div className="mx_SpaceButton_selectionWrapper">
+                        <RoomAvatar width={avatarSize} height={avatarSize} room={space} />
+                        { notifBadge }
+                        { this.renderContextMenu() }
+                    </div>
+                </RovingAccessibleTooltipButton>
+            );
+        } else {
+            button = (
+                <RovingAccessibleButton
+                    className={classes}
+                    onClick={this.onClick}
+                    onContextMenu={this.onContextMenu}
+                    role="treeitem"
+                >
+                    { toggleCollapseButton }
+                    <div className="mx_SpaceButton_selectionWrapper">
+                        <RoomAvatar width={avatarSize} height={avatarSize} room={space} />
+                        <span className="mx_SpaceButton_name">{ space.name }</span>
+                        { notifBadge }
+                        { this.renderContextMenu() }
+                    </div>
+                </RovingAccessibleButton>
+            );
+        }
+
+        return (
+            <li className={itemClasses}>
+                { button }
+                { childItems }
+            </li>
+        );
+    }
+}
+
+interface ITreeLevelProps {
+    spaces: Room[];
+    activeSpaces: Room[];
+    isNested?: boolean;
+}
+
+const SpaceTreeLevel: React.FC<ITreeLevelProps> = ({
+    spaces,
+    activeSpaces,
+    isNested,
+}) => {
+    return <ul className="mx_SpaceTreeLevel">
+        {spaces.map(s => {
+            return (<SpaceItem
+                key={s.roomId}
+                activeSpaces={activeSpaces}
+                space={s}
+                isNested={isNested}
+            />);
+        })}
+    </ul>;
+}
+
+export default SpaceTreeLevel;

src/components/views/voip/CallView.tsx

@@ -518,7 +518,7 @@ export default class CallView extends React.Component<IProps, IState> {
             }
 
             // if we're fullscreen, we don't want to set a maxHeight on the video element.
-            const maxVideoHeight = getFullScreenElement() ? null : (
+            const maxVideoHeight = getFullScreenElement() || !this.props.maxVideoHeight ? null : (
                 this.props.maxVideoHeight - (HEADER_HEIGHT + BOTTOM_PADDING + BOTTOM_MARGIN_TOP_BOTTOM)
             );
             contentView = <div className={containerClasses}

src/components/views/voip/DialPadModal.tsx

@@ -24,6 +24,7 @@ import DialPad from './DialPad';
 import dis from '../../../dispatcher/dispatcher';
 import Modal from "../../../Modal";
 import ErrorDialog from "../../views/dialogs/ErrorDialog";
+import CallHandler from "../../../CallHandler";
 
 interface IProps {
     onFinished: (boolean) => void;
@@ -64,9 +65,7 @@ export default class DialpadModal extends React.PureComponent<IProps, IState> {
     }
 
     onDialPress = async () => {
-        const results = await MatrixClientPeg.get().getThirdpartyUser('im.vector.protocol.pstn', {
-            'm.id.phone': this.state.value,
-        });
+        const results = await CallHandler.sharedInstance().pstnLookup(this.state.value);
         if (!results || results.length === 0 || !results[0].userid) {
             Modal.createTrackedDialog('', '', ErrorDialog, {
                 title: _t("Unable to look up phone number"),