disable preview formattingBar disabled (#28727)

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/channels/src/components/advanced_text_editor/advanced_text_editor.tsx

@@ -168,6 +168,7 @@ const AdvancedTextEditor = ({
 
     const readOnlyChannel = !canPost;
     const hasDraftMessage = Boolean(draft.message);
+    const showFormattingBar = !isFormattingBarHidden && !readOnlyChannel;
     const enableSharedChannelsDMs = useSelector((state: GlobalState) => getFeatureFlagValue(state, 'EnableSharedChannelsDMs') === 'true');
     const isDMOrGMRemote = isChannelShared && (channelType === Constants.DM_CHANNEL || channelType === Constants.GM_CHANNEL);
     const isDisabled = Boolean(readOnlyChannel || (!enableSharedChannelsDMs && isDMOrGMRemote));
@@ -282,6 +283,7 @@ const AdvancedTextEditor = ({
         isValidPersistentNotifications,
         location,
         textboxRef,
+        showFormattingBar,
         focusTextbox,
         applyMarkdown,
         handleDraftChange,
@@ -515,8 +517,6 @@ const AdvancedTextEditor = ({
         break;
     }
 
-    const showFormattingBar = !isFormattingBarHidden && !isDisabled;
-
     const wasNotifiedOfLogIn = LocalStorageStore.getWasNotifiedOfLogIn();
 
     let loginSuccessfulLabel;

webapp/channels/src/components/advanced_text_editor/use_key_handler.tsx

@@ -38,6 +38,7 @@ const useKeyHandler = (
     isValidPersistentNotifications: boolean,
     location: string,
     textboxRef: React.RefObject<TextboxClass>,
+    showFormattingBar: boolean,
     focusTextbox: (forceFocus?: boolean) => void,
     applyMarkdown: (params: ApplyMarkdownOptions) => void,
     handleDraftChange: (draft: PostDraft, options?: {instant?: boolean; show?: boolean}) => void,
@@ -257,7 +258,7 @@ const useKeyHandler = (
                 e.stopPropagation();
                 e.preventDefault();
                 toggleAdvanceTextEditor();
-            } else if (Keyboard.isKeyPressed(e, KeyCodes.P) && draft.message.length && !UserAgent.isMac()) {
+            } else if (Keyboard.isKeyPressed(e, KeyCodes.P) && draft.message.length && !UserAgent.isMac() && showFormattingBar) {
                 e.stopPropagation();
                 e.preventDefault();
                 toggleShowPreview();