Fix RTE focus behaviour in threads

src/components/views/rooms/MessageComposer.tsx

@@ -336,7 +336,10 @@ export class MessageComposer extends React.Component<IProps, IState> {
             const { permalinkCreator, relation, replyToEvent } = this.props;
             const composerContent = this.state.composerContent;
             this.setState({ composerContent: "", initialComposerContent: "" });
-            dis.dispatch({ action: Action.ClearAndFocusSendMessageComposer });
+            dis.dispatch({
+                action: Action.ClearAndFocusSendMessageComposer,
+                timelineRenderingType: this.context.timelineRenderingType,
+            });
             await sendMessage(composerContent, this.state.isRichTextEnabled, {
                 mxClient: this.props.mxClient,
                 roomContext: this.context,

src/components/views/rooms/wysiwyg_composer/hooks/useWysiwygSendActionHandler.ts

@@ -50,6 +50,9 @@ export function useWysiwygSendActionHandler(
                     focusComposer(composerElement, context, roomContext, timeoutId);
                     break;
                 case Action.ClearAndFocusSendMessageComposer:
+                    // When a thread is opened, prevent the main composer to steal the thread composer focus
+                    if (payload.timelineRenderingType !== roomContext.timelineRenderingType) break;
+
                     composerFunctions.clear();
                     focusComposer(composerElement, context, roomContext, timeoutId);
                     break;

test/components/views/rooms/wysiwyg_composer/SendWysiwygComposer-test.tsx

@@ -153,7 +153,7 @@ describe("SendWysiwygComposer", () => {
                 // When we send the right action
                 defaultDispatcher.dispatch({
                     action: Action.ClearAndFocusSendMessageComposer,
-                    context: null,
+                    timelineRenderingType: defaultRoomContext.timelineRenderingType,
                 });
 
                 // Then the component gets the focus