Fix problem with cursor jumping back to start when adding an emoji in edit mode

src/libs/focusComposerWithDelay.ts → src/libs/focusComposerWithDelay/index.ts

@@ -1,17 +1,18 @@
-import type {TextInput} from 'react-native';
-import * as EmojiPickerAction from './actions/EmojiPickerAction';
-import ComposerFocusManager from './ComposerFocusManager';
+import ComposerFocusManager from '@libs/ComposerFocusManager';
+import * as EmojiPickerAction from '@userActions/EmojiPickerAction';
+import setTextInputSelection from './setTextInputSelection';
+import type {FocusComposerWithDelay, InputType} from './types';
 
-type FocusComposerWithDelay = (shouldDelay?: boolean) => void;
 /**
  * Create a function that focuses the composer.
  */
-function focusComposerWithDelay(textInput: TextInput | null): FocusComposerWithDelay {
+function focusComposerWithDelay(textInput: InputType | null): FocusComposerWithDelay {
     /**
      * Focus the text input
      * @param [shouldDelay] Impose delay before focusing the text input
+     * @param [forcedSelectionRange] Force selection range of text input
      */
-    return (shouldDelay = false) => {
+    return (shouldDelay = false, forcedSelectionRange = undefined) => {
         // There could be other animations running while we trigger manual focus.
         // This prevents focus from making those animations janky.
         if (!textInput || EmojiPickerAction.isEmojiPickerVisible()) {
@@ -20,13 +21,19 @@ function focusComposerWithDelay(textInput: TextInput | null): FocusComposerWithD
 
         if (!shouldDelay) {
             textInput.focus();
+            if (forcedSelectionRange) {
+                setTextInputSelection(textInput, forcedSelectionRange);
+            }
             return;
         }
         ComposerFocusManager.isReadyToFocus().then(() => {
             if (!textInput) {
                 return;
             }
             textInput.focus();
+            if (forcedSelectionRange) {
+                setTextInputSelection(textInput, forcedSelectionRange);
+            }
         });
     };
 }

src/libs/focusComposerWithDelay/setTextInputSelection.ts

@@ -0,0 +1,15 @@
+import type {TextInput} from 'react-native';
+import shouldSetSelectionRange from '@libs/shouldSetSelectionRange';
+import type {InputType, Selection} from './types';
+
+const setSelectionRange = shouldSetSelectionRange();
+
+const setTextInputSelection = (textInput: InputType, forcedSelectionRange: Selection) => {
+    if (setSelectionRange) {
+        (textInput as HTMLTextAreaElement).setSelectionRange(forcedSelectionRange.start, forcedSelectionRange.end);
+    } else {
+        (textInput as TextInput).setSelection(forcedSelectionRange.start, forcedSelectionRange.end);
+    }
+};
+
+export default setTextInputSelection;

src/libs/focusComposerWithDelay/types.ts

@@ -0,0 +1,12 @@
+import type {TextInput} from 'react-native';
+
+type Selection = {
+    start: number;
+    end: number;
+};
+
+type FocusComposerWithDelay = (shouldDelay?: boolean, forcedSelectionRange?: Selection) => void;
+
+type InputType = TextInput | HTMLTextAreaElement;
+
+export type {Selection, FocusComposerWithDelay, InputType};

src/libs/shouldSetSelectionRange/index.ts

@@ -0,0 +1,5 @@
+import type ShouldSetSelectionRange from './types';
+
+const shouldSetSelectionRange: ShouldSetSelectionRange = () => false;
+
+export default shouldSetSelectionRange;

src/libs/shouldSetSelectionRange/index.website.ts

@@ -0,0 +1,5 @@
+import type ShouldSetSelectionRange from './types';
+
+const shouldSetSelectionRange: ShouldSetSelectionRange = () => true;
+
+export default shouldSetSelectionRange;

src/libs/shouldSetSelectionRange/types.ts

@@ -0,0 +1,3 @@
+type ShouldSetSelectionRange = () => boolean;
+
+export default ShouldSetSelectionRange;

src/pages/home/report/ReportActionItemMessageEdit.tsx

@@ -26,6 +26,7 @@ import * as Browser from '@libs/Browser';
 import * as ComposerUtils from '@libs/ComposerUtils';
 import * as EmojiUtils from '@libs/EmojiUtils';
 import focusComposerWithDelay from '@libs/focusComposerWithDelay';
+import type {Selection} from '@libs/focusComposerWithDelay/types';
 import focusEditAfterCancelDelete from '@libs/focusEditAfterCancelDelete';
 import onyxSubscribe from '@libs/onyxSubscribe';
 import ReportActionComposeFocusManager from '@libs/ReportActionComposeFocusManager';
@@ -41,6 +42,7 @@ import CONST from '@src/CONST';
 import ONYXKEYS from '@src/ONYXKEYS';
 import type * as OnyxTypes from '@src/types/onyx';
 import * as ReportActionContextMenu from './ContextMenu/ReportActionContextMenu';
+import shouldUseEmojiPickerSelection from './shouldUseEmojiPickerSelection';
 
 type ReportActionItemMessageEditProps = {
     /** All the data of the action */
@@ -67,6 +69,7 @@ const emojiButtonID = 'emojiButton';
 const messageEditInput = 'messageEditInput';
 
 const isMobileSafari = Browser.isMobileSafari();
+const shouldUseForcedSelectionRange = shouldUseEmojiPickerSelection();
 
 function ReportActionItemMessageEdit(
     {action, draftMessage, reportID, index, shouldDisableEmojiPicker = false, preferredSkinTone = CONST.EMOJI_DEFAULT_SKIN_TONE}: ReportActionItemMessageEditProps,
@@ -106,10 +109,7 @@ function ReportActionItemMessageEdit(
         }
         return initialDraft;
     });
-    const [selection, setSelection] = useState<{
-        start: number;
-        end: number;
-    }>(getInitialSelection);
+    const [selection, setSelection] = useState<Selection>(getInitialSelection);
     const [isFocused, setIsFocused] = useState<boolean>(false);
     const {hasExceededMaxCommentLength, validateCommentMaxLength} = useHandleExceedMaxCommentLength();
     const [modal, setModal] = useState<OnyxTypes.Modal>({
@@ -122,6 +122,7 @@ function ReportActionItemMessageEdit(
     const isFocusedRef = useRef<boolean>(false);
     const insertedEmojis = useRef<Emoji[]>([]);
     const draftRef = useRef(draft);
+    const emojiPickerSelectionRef = useRef<Selection | undefined>(undefined);
 
     useEffect(() => {
         if (ReportActionsUtils.isDeletedAction(action) || (action.message && draftMessage === action.message[0].html)) {
@@ -334,10 +335,17 @@ function ReportActionItemMessageEdit(
      * @param emoji
      */
     const addEmojiToTextBox = (emoji: string) => {
-        setSelection((prevSelection) => ({
-            start: prevSelection.start + emoji.length + CONST.SPACE_LENGTH,
-            end: prevSelection.start + emoji.length + CONST.SPACE_LENGTH,
-        }));
+        const newSelection = {
+            start: selection.start + emoji.length + CONST.SPACE_LENGTH,
+            end: selection.start + emoji.length + CONST.SPACE_LENGTH,
+        };
+        setSelection(newSelection);
+
+        if (shouldUseForcedSelectionRange) {
+            // On Android and Chrome mobile, focusing the input sets the cursor position back to the start.
+            // To fix this, immediately set the selection again after focusing the input.
+            emojiPickerSelectionRef.current = newSelection;
+        }
         updateDraft(ComposerUtils.insertText(draft, selection, `${emoji} `));
     };
 
@@ -451,7 +459,9 @@ function ReportActionItemMessageEdit(
                     <View style={styles.editChatItemEmojiWrapper}>
                         <EmojiPickerButton
                             isDisabled={shouldDisableEmojiPicker}
-                            onModalHide={() => focus(true)}
+                            onModalHide={() => {
+                                focus(true, emojiPickerSelectionRef.current ? {...emojiPickerSelectionRef.current} : undefined);
+                            }}
                             onEmojiSelected={addEmojiToTextBox}
                             id={emojiButtonID}
                             emojiPickerID={action.reportActionID}

src/pages/home/report/shouldUseEmojiPickerSelection/index.android.ts

@@ -0,0 +1,5 @@
+import type ShouldUseEmojiPickerSelection from './types';
+
+const shouldUseEmojiPickerSelection: ShouldUseEmojiPickerSelection = () => true;
+
+export default shouldUseEmojiPickerSelection;

src/pages/home/report/shouldUseEmojiPickerSelection/index.ts

@@ -0,0 +1,5 @@
+import type ShouldUseEmojiPickerSelection from './types';
+
+const shouldUseEmojiPickerSelection: ShouldUseEmojiPickerSelection = () => false;
+
+export default shouldUseEmojiPickerSelection;

src/pages/home/report/shouldUseEmojiPickerSelection/index.website.ts

@@ -0,0 +1,8 @@
+import * as Browser from '@libs/Browser';
+import type ShouldUseEmojiPickerSelection from './types';
+
+const isMobileChrome = Browser.isMobileChrome();
+
+const shouldUseEmojiPickerSelection: ShouldUseEmojiPickerSelection = () => isMobileChrome;
+
+export default shouldUseEmojiPickerSelection;

src/pages/home/report/shouldUseEmojiPickerSelection/types.ts

@@ -0,0 +1,3 @@
+type ShouldUseEmojiPickerSelection = () => boolean;
+
+export default ShouldUseEmojiPickerSelection;