Make composer buttons react to settings without having to change room

src/components/views/rooms/MessageComposer.tsx

@@ -35,7 +35,6 @@ import ContextMenu, {
 } from "../../structures/ContextMenu";
 import AccessibleTooltipButton from "../elements/AccessibleTooltipButton";
 import ReplyPreview from "./ReplyPreview";
-import { UIFeature } from "../../../settings/UIFeature";
 import { UPDATE_EVENT } from "../../../stores/AsyncStore";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 import VoiceRecordComposerTile from "./VoiceRecordComposerTile";
@@ -56,6 +55,7 @@ import RoomContext from '../../../contexts/RoomContext';
 import { POLL_START_EVENT_TYPE } from "../../../polls/consts";
 import ErrorDialog from "../dialogs/ErrorDialog";
 import PollCreateDialog from "../elements/PollCreateDialog";
+import { SettingUpdatedPayload } from "../../../dispatcher/payloads/SettingUpdatedPayload";
 
 let instanceCount = 0;
 const NARROW_MODE_BREAKPOINT = 500;
@@ -249,6 +249,8 @@ interface IState {
     narrowMode?: boolean;
     isMenuOpen: boolean;
     showStickers: boolean;
+    showStickersButton: boolean;
+    showPollsButton: boolean;
 }
 
 @replaceableComponent("views.rooms.MessageComposer")
@@ -278,9 +280,14 @@ export default class MessageComposer extends React.Component<IProps, IState> {
             recordingTimeLeftSeconds: null, // when set to a number, shows a toast
             isMenuOpen: false,
             showStickers: false,
+            showStickersButton: SettingsStore.getValue("MessageComposerInput.showStickersButton"),
+            showPollsButton: SettingsStore.getValue("feature_polls"),
         };
 
         this.instanceId = instanceCount++;
+
+        SettingsStore.monitorSetting("MessageComposerInput.showStickersButton", null);
+        SettingsStore.monitorSetting("feature_polls", null);
     }
 
     componentDidMount() {
@@ -303,14 +310,39 @@ export default class MessageComposer extends React.Component<IProps, IState> {
     };
 
     private onAction = (payload: ActionPayload) => {
-        if (payload.action === 'reply_to_event' && payload.context === this.context.timelineRenderingType) {
-            // add a timeout for the reply preview to be rendered, so
-            // that the ScrollPanel listening to the resizeNotifier can
-            // correctly measure it's new height and scroll down to keep
-            // at the bottom if it already is
-            setTimeout(() => {
-                this.props.resizeNotifier.notifyTimelineHeightChanged();
-            }, 100);
+        switch (payload.action) {
+            case "reply_to_event":
+                if (payload.context === this.context.timelineRenderingType) {
+                    // add a timeout for the reply preview to be rendered, so
+                    // that the ScrollPanel listening to the resizeNotifier can
+                    // correctly measure it's new height and scroll down to keep
+                    // at the bottom if it already is
+                    setTimeout(() => {
+                        this.props.resizeNotifier.notifyTimelineHeightChanged();
+                    }, 100);
+                }
+                break;
+
+            case Action.SettingUpdated: {
+                const settingUpdatedPayload = payload as SettingUpdatedPayload;
+                switch (settingUpdatedPayload.settingName) {
+                    case "MessageComposerInput.showStickersButton": {
+                        const showStickersButton = SettingsStore.getValue("MessageComposerInput.showStickersButton");
+                        if (this.state.showStickersButton !== showStickersButton) {
+                            this.setState({ showStickersButton });
+                        }
+                        break;
+                    }
+
+                    case "feature_polls": {
+                        const showPollsButton = SettingsStore.getValue("feature_polls");
+                        if (this.state.showPollsButton !== showPollsButton) {
+                            this.setState({ showPollsButton });
+                        }
+                        break;
+                    }
+                }
+            }
         }
     };
 
@@ -452,9 +484,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
     };
 
     private shouldShowStickerPicker = (): boolean => {
-        return SettingsStore.getValue(UIFeature.Widgets)
-        && SettingsStore.getValue("MessageComposerInput.showStickersButton")
-        && !this.state.haveRecording;
+        return this.state.showStickersButton && !this.state.haveRecording;
     };
 
     private showStickers = (showStickers: boolean) => {
@@ -471,7 +501,7 @@ export default class MessageComposer extends React.Component<IProps, IState> {
         let uploadButtonIndex = 0;
         const buttons: JSX.Element[] = [];
         if (!this.state.haveRecording) {
-            if (SettingsStore.getValue("feature_polls")) {
+            if (this.state.showPollsButton) {
                 buttons.push(
                     <PollButton key="polls" room={this.props.room} />,
                 );

src/settings/Settings.tsx

@@ -392,6 +392,7 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         supportedLevels: LEVELS_ACCOUNT_SETTINGS,
         displayName: _td('Show stickers button'),
         default: true,
+        controller: new UIFeatureController(UIFeature.Widgets, false),
     },
     // TODO: Wire up appropriately to UI (FTUE notifications)
     "Notifications.alwaysShowBadgeCounts": {