Fix editing the message

src/hooks/useFrozenScroll.js

@@ -0,0 +1,10 @@
+import {useContext} from 'react';
+import {ReportActionListFrozenScrollContext} from "../pages/home/report/ReportActionListFrozenScrollContext";
+
+/**
+ * Hook for getting current state of scroll freeze and a function to set whether the scroll should be frozen
+ * @returns {Object}
+ */
+export default function useFrozenScroll() {
+    return useContext(ReportActionListFrozenScrollContext);
+}

src/pages/home/ReportScreen.js

@@ -39,6 +39,7 @@ import DragAndDropProvider from '../../components/DragAndDrop/Provider';
 import usePrevious from '../../hooks/usePrevious';
 import CONST from '../../CONST';
 import withCurrentReportID, {withCurrentReportIDPropTypes, withCurrentReportIDDefaultProps} from '../../components/withCurrentReportID';
+import {ReportActionListFrozenScrollContextProvider} from "./report/ReportActionListFrozenScrollContext";
 
 const propTypes = {
     /** Navigation route context info provided by react navigation */
@@ -357,98 +358,101 @@ function ReportScreen({
                 reactionListRef,
             }}
         >
-            <ScreenWrapper
-                style={screenWrapperStyle}
-                shouldEnableKeyboardAvoidingView={isTopMostReportId}
-                testID={ReportScreen.displayName}
-            >
-                <FullPageNotFoundView
-                    shouldShow={shouldShowNotFoundPage}
-                    subtitleKey="notFound.noAccess"
-                    shouldShowCloseButton={false}
-                    shouldShowBackButton={isSmallScreenWidth}
-                    shouldShowLink={false}
+            <ReportActionListFrozenScrollContextProvider>
+                <ScreenWrapper
+                    style={screenWrapperStyle}
+                    shouldEnableKeyboardAvoidingView={isTopMostReportId}
+                    testID={ReportScreen.displayName}
                 >
-                    <OfflineWithFeedback
-                        pendingAction={addWorkspaceRoomOrChatPendingAction}
-                        errors={addWorkspaceRoomOrChatErrors}
-                        shouldShowErrorMessages={false}
-                        needsOffscreenAlphaCompositing
+                    <FullPageNotFoundView
+                        shouldShow={shouldShowNotFoundPage}
+                        subtitleKey="notFound.noAccess"
+                        shouldShowCloseButton={false}
+                        shouldShowBackButton={isSmallScreenWidth}
+                        shouldShowLink={false}
                     >
-                        {headerView}
-                        {ReportUtils.isTaskReport(report) && isSmallScreenWidth && ReportUtils.isOpenTaskReport(report, parentReportAction) && (
-                            <View style={[styles.borderBottom]}>
-                                <View style={[styles.appBG, styles.pl0]}>
-                                    <View style={[styles.ph5, styles.pb3]}>
-                                        <TaskHeaderActionButton report={report} />
+                        <OfflineWithFeedback
+                            pendingAction={addWorkspaceRoomOrChatPendingAction}
+                            errors={addWorkspaceRoomOrChatErrors}
+                            shouldShowErrorMessages={false}
+                            needsOffscreenAlphaCompositing
+                        >
+                            {headerView}
+                            {ReportUtils.isTaskReport(report) && isSmallScreenWidth && ReportUtils.isOpenTaskReport(report, parentReportAction) && (
+                                <View style={[styles.borderBottom]}>
+                                    <View style={[styles.appBG, styles.pl0]}>
+                                        <View style={[styles.ph5, styles.pb3]}>
+                                            <TaskHeaderActionButton report={report}/>
+                                        </View>
                                     </View>
                                 </View>
-                            </View>
-                        )}
-                    </OfflineWithFeedback>
-                    {Boolean(accountManagerReportID) && ReportUtils.isConciergeChatReport(report) && isBannerVisible && (
-                        <Banner
-                            containerStyles={[styles.mh4, styles.mt4, styles.p4, styles.bgDark]}
-                            textStyles={[styles.colorReversed]}
-                            text={translate('reportActionsView.chatWithAccountManager')}
-                            onClose={dismissBanner}
-                            onPress={chatWithAccountManager}
-                            shouldShowCloseButton
-                        />
-                    )}
-                    <DragAndDropProvider isDisabled={!isReportReadyForDisplay}>
-                        <View
-                            style={[styles.flex1, styles.justifyContentEnd, styles.overflowHidden]}
-                            onLayout={(event) => {
-                                // Rounding this value for comparison because they can look like this: 411.9999694824219
-                                const newSkeletonViewContainerHeight = Math.round(event.nativeEvent.layout.height);
-
-                                // The height can be 0 if the component unmounts - we are not interested in this value and want to know how much space it
-                                // takes up so we can set the skeleton view container height.
-                                if (newSkeletonViewContainerHeight === 0) {
-                                    return;
-                                }
-                                setSkeletonViewContainerHeight(newSkeletonViewContainerHeight);
-                            }}
-                        >
-                            {isReportReadyForDisplay && !isLoadingInitialReportActions && !isLoading && (
-                                <ReportActionsView
-                                    reportActions={reportActions}
-                                    report={report}
-                                    isComposerFullSize={isComposerFullSize}
-                                    parentViewHeight={skeletonViewContainerHeight}
-                                    policy={policy}
-                                />
                             )}
-
-                            {/* Note: The report should be allowed to mount even if the initial report actions are not loaded. If we prevent rendering the report while they are loading then
-                            we'll unnecessarily unmount the ReportActionsView which will clear the new marker lines initial state. */}
-                            {(!isReportReadyForDisplay || isLoadingInitialReportActions || isLoading) && <ReportActionsSkeletonView containerHeight={skeletonViewContainerHeight} />}
-
-                            {isReportReadyForDisplay && (
-                                <>
-                                    <ReportFooter
-                                        pendingAction={addWorkspaceRoomOrChatPendingAction}
-                                        isOffline={isOffline}
+                        </OfflineWithFeedback>
+                        {Boolean(accountManagerReportID) && ReportUtils.isConciergeChatReport(report) && isBannerVisible && (
+                            <Banner
+                                containerStyles={[styles.mh4, styles.mt4, styles.p4, styles.bgDark]}
+                                textStyles={[styles.colorReversed]}
+                                text={translate('reportActionsView.chatWithAccountManager')}
+                                onClose={dismissBanner}
+                                onPress={chatWithAccountManager}
+                                shouldShowCloseButton
+                            />
+                        )}
+                        <DragAndDropProvider isDisabled={!isReportReadyForDisplay}>
+                            <View
+                                style={[styles.flex1, styles.justifyContentEnd, styles.overflowHidden]}
+                                onLayout={(event) => {
+                                    // Rounding this value for comparison because they can look like this: 411.9999694824219
+                                    const newSkeletonViewContainerHeight = Math.round(event.nativeEvent.layout.height);
+
+                                    // The height can be 0 if the component unmounts - we are not interested in this value and want to know how much space it
+                                    // takes up so we can set the skeleton view container height.
+                                    if (newSkeletonViewContainerHeight === 0) {
+                                        return;
+                                    }
+                                    setSkeletonViewContainerHeight(newSkeletonViewContainerHeight);
+                                }}
+                            >
+                                {isReportReadyForDisplay && !isLoadingInitialReportActions && !isLoading && (
+                                    <ReportActionsView
                                         reportActions={reportActions}
                                         report={report}
                                         isComposerFullSize={isComposerFullSize}
-                                        onSubmitComment={onSubmitComment}
-                                        policies={policies}
+                                        parentViewHeight={skeletonViewContainerHeight}
+                                        policy={policy}
                                     />
-                                </>
-                            )}
+                                )}
 
-                            {!isReportReadyForDisplay && (
-                                <ReportFooter
-                                    shouldDisableCompose
-                                    isOffline={isOffline}
-                                />
-                            )}
-                        </View>
-                    </DragAndDropProvider>
-                </FullPageNotFoundView>
-            </ScreenWrapper>
+                                {/* Note: The report should be allowed to mount even if the initial report actions are not loaded. If we prevent rendering the report while they are loading then
+                            we'll unnecessarily unmount the ReportActionsView which will clear the new marker lines initial state. */}
+                                {(!isReportReadyForDisplay || isLoadingInitialReportActions || isLoading) &&
+                                    <ReportActionsSkeletonView containerHeight={skeletonViewContainerHeight}/>}
+
+                                {isReportReadyForDisplay && (
+                                    <>
+                                        <ReportFooter
+                                            pendingAction={addWorkspaceRoomOrChatPendingAction}
+                                            isOffline={isOffline}
+                                            reportActions={reportActions}
+                                            report={report}
+                                            isComposerFullSize={isComposerFullSize}
+                                            onSubmitComment={onSubmitComment}
+                                            policies={policies}
+                                        />
+                                    </>
+                                )}
+
+                                {!isReportReadyForDisplay && (
+                                    <ReportFooter
+                                        shouldDisableCompose
+                                        isOffline={isOffline}
+                                    />
+                                )}
+                            </View>
+                        </DragAndDropProvider>
+                    </FullPageNotFoundView>
+                </ScreenWrapper>
+            </ReportActionListFrozenScrollContextProvider>
         </ReportScreenContext.Provider>
     );
 }

src/pages/home/report/ReportActionItemMessageEdit.js

@@ -40,6 +40,7 @@ import * as EmojiPickerAction from '../../../libs/actions/EmojiPickerAction';
 import focusWithDelay from '../../../libs/focusWithDelay';
 import ONYXKEYS from '../../../ONYXKEYS';
 import * as Browser from '../../../libs/Browser';
+import useFrozenScroll from "../../../hooks/useFrozenScroll";
 
 const propTypes = {
     /** All the data of the action */
@@ -122,6 +123,8 @@ function ReportActionItemMessageEdit(props) {
     const isFocusedRef = useRef(false);
     const insertedEmojis = useRef([]);
 
+    const {setShouldFreezeScroll} = useFrozenScroll();
+
     useEffect(() => {
         // required for keeping last state of isFocused variable
         isFocusedRef.current = isFocused;
@@ -235,6 +238,7 @@ function ReportActionItemMessageEdit(props) {
      * Delete the draft of the comment being edited. This will take the comment out of "edit mode" with the old content.
      */
     const deleteDraft = useCallback(() => {
+        setShouldFreezeScroll(false);
         debouncedSaveDraft.cancel();
         Report.saveReportActionDraft(props.reportID, props.action.reportActionID, '');
 
@@ -250,7 +254,7 @@ function ReportActionItemMessageEdit(props) {
                 keyboardDidHideListener.remove();
             });
         }
-    }, [props.action.reportActionID, debouncedSaveDraft, props.index, props.reportID, reportScrollManager, isActive]);
+    }, [setShouldFreezeScroll, props.action.reportActionID, debouncedSaveDraft, props.index, props.reportID, reportScrollManager, isActive]);
 
     /**
      * Save the draft of the comment to be the new comment message. This will take the comment out of "edit mode" with
@@ -382,8 +386,9 @@ function ReportActionItemMessageEdit(props) {
                             maxLines={isSmallScreenWidth ? CONST.COMPOSER.MAX_LINES_SMALL_SCREEN : CONST.COMPOSER.MAX_LINES} // This is the same that slack has
                             style={[styles.textInputCompose, styles.flex1, styles.bgTransparent]}
                             onFocus={() => {
-                                setIsFocused(true);
                                 reportScrollManager.scrollToIndex({animated: true, index: props.index}, true);
+                                setIsFocused(true);
+                                setShouldFreezeScroll(true);
                                 setShouldShowComposeInputKeyboardAware(false);
 
                                 // Clear active report action when another action gets focused
@@ -396,6 +401,7 @@ function ReportActionItemMessageEdit(props) {
                             }}
                             onBlur={(event) => {
                                 setIsFocused(false);
+                                setShouldFreezeScroll(false);
                                 const relatedTargetId = lodashGet(event, 'nativeEvent.relatedTarget.id');
                                 if (_.contains([messageEditInput, emojiButtonID], relatedTargetId)) {
                                     return;

src/pages/home/report/ReportActionListFrozenScrollContext.js

@@ -0,0 +1,67 @@
+import React, {createContext, forwardRef, useMemo, useState} from "react";
+import PropTypes from "prop-types";
+import getComponentDisplayName from "../../../libs/getComponentDisplayName";
+
+
+const withScrollFrozenPropTypes = {
+    /** flag determining if we should freeze the scroll */
+    shouldFreezeScroll: PropTypes.bool,
+
+    /** Function to update the state */
+    setShouldFreezeScroll: PropTypes.func,
+};
+
+const ReportActionListFrozenScrollContext = createContext(null);
+
+
+function ReportActionListFrozenScrollContextProvider(props) {
+    const [shouldFreezeScroll, setShouldFreezeScroll] = useState(false);
+
+    /**
+     * The context this component exposes to child components
+     * @returns {Object} flag and a flag setter
+     */
+    const contextValue = useMemo(
+        () => ({
+            shouldFreezeScroll,
+            setShouldFreezeScroll,
+        }),
+        [shouldFreezeScroll, setShouldFreezeScroll],
+    );
+
+    return <ReportActionListFrozenScrollContext.Provider
+        value={contextValue}>{props.children}</ReportActionListFrozenScrollContext.Provider>;
+}
+
+ReportActionListFrozenScrollContextProvider.displayName = 'ReportActionListFrozenScrollContextProvider';
+ReportActionListFrozenScrollContextProvider.propTypes = {
+    /** Actual content wrapped by this component */
+    children: PropTypes.node.isRequired,
+};
+
+function withScrollFrozen(WrappedComponent) {
+    const WithScrollFrozenState = forwardRef((props, ref) => (
+        <ReportActionListFrozenScrollContext.Consumer>
+            {(scrollFrozenProps) =>
+            <WrappedComponent
+                // eslint-disable-next-line react/jsx-props-no-spreading
+                {...scrollFrozenProps}
+                // eslint-disable-next-line react/jsx-props-no-spreading
+                {...props}
+                ref={ref}
+            />
+        }
+        </ReportActionListFrozenScrollContext.Consumer>
+    ));
+
+    WithScrollFrozenState.displayName = `WithScrollFrozenState(${getComponentDisplayName(WrappedComponent)})`;
+    return WithScrollFrozenState;
+}
+
+
+export {
+    ReportActionListFrozenScrollContext,
+    ReportActionListFrozenScrollContextProvider,
+    withScrollFrozenPropTypes,
+    withScrollFrozen
+};

src/pages/home/report/ReportActionsList.js

@@ -21,6 +21,7 @@ import reportPropTypes from '../../reportPropTypes';
 import FloatingMessageCounter from './FloatingMessageCounter';
 import ReportActionsListItemRenderer from './ReportActionsListItemRenderer';
 import reportActionPropTypes from './reportActionPropTypes';
+import useFrozenScroll from "../../../hooks/useFrozenScroll";
 
 const propTypes = {
     /** The report currently being looked at */
@@ -90,6 +91,10 @@ function keyExtractor(item) {
     return item.reportActionID;
 }
 
+const maintainVisibleContentPositionOptions = {
+    minIndexForVisible: 1,
+}
+
 function isMessageUnread(message, lastReadTime) {
     return Boolean(message && lastReadTime && message.created && lastReadTime < message.created);
 }
@@ -130,6 +135,7 @@ function ReportActionsList({
         opacity.value = withTiming(1, {duration: 100});
     }, [opacity]);
     const [skeletonViewHeight, setSkeletonViewHeight] = useState(0);
+    const {shouldFreezeScroll} = useFrozenScroll();
 
     useEffect(() => {
         // If the reportID changes, we reset the userActiveSince to null, we need to do it because
@@ -360,6 +366,7 @@ function ReportActionsList({
                     }}
                     onScroll={trackVerticalScrolling}
                     extraData={extraData}
+                    maintainVisibleContentPosition={shouldFreezeScroll ? maintainVisibleContentPositionOptions : null}
                 />
             </Animated.View>
         </>