From 0087e3d1592e4c1c991162f6a434945f09cf53af Mon Sep 17 00:00:00 2001
From: Gerardo Pacheco <gerardo.pacheco@automattic.com>
Date: Wed, 18 May 2022 11:05:19 +0200
Subject: [PATCH] [Mobile] - Fix Drag & Drop Chip positioning issue with RTL
 languages (#41053)

* Mobile - Fix - Drag & drop chip issue with RTL languages

* Mobile - BlockDraggable - Rename maxWidth variable to contentWidth

* Mobile - BlockDraggable - Add custom exiting animation that uses the same functionality as ZoomOutEasyDown but customizing the translateX value taking into account RTL languages.
---
 .../block-draggable/index.native.js           | 51 +++++++++++++++++--
 .../src/components/block-list/index.native.js |  7 ++-
 2 files changed, 52 insertions(+), 6 deletions(-)

diff --git a/packages/block-editor/src/components/block-draggable/index.native.js b/packages/block-editor/src/components/block-draggable/index.native.js
index a52396db27fc4..ec76781d449fc 100644
--- a/packages/block-editor/src/components/block-draggable/index.native.js
+++ b/packages/block-editor/src/components/block-draggable/index.native.js
@@ -2,6 +2,10 @@
  * External dependencies
  */
 import { AccessibilityInfo } from 'react-native';
+import {
+	useSafeAreaInsets,
+	useSafeAreaFrame,
+} from 'react-native-safe-area-context';
 import Animated, {
 	runOnJS,
 	runOnUI,
@@ -11,7 +15,6 @@ import Animated, {
 	withDelay,
 	withTiming,
 	ZoomInEasyDown,
-	ZoomOutEasyDown,
 } from 'react-native-reanimated';
 
 /**
@@ -61,10 +64,11 @@ const DEFAULT_IOS_LONG_PRESS_MIN_DURATION =
  *
  * @param {Object}      props          Component props.
  * @param {JSX.Element} props.children Children to be rendered.
+ * @param {boolean}     props.isRTL    Check if current locale is RTL.
  *
  * @return {Function} Render function that passes `onScroll` event handler.
  */
-const BlockDraggableWrapper = ( { children } ) => {
+const BlockDraggableWrapper = ( { children, isRTL } ) => {
 	const [ draggedBlockIcon, setDraggedBlockIcon ] = useState();
 
 	const {
@@ -75,6 +79,10 @@ const BlockDraggableWrapper = ( { children } ) => {
 
 	const { scrollRef } = useBlockListContext();
 	const animatedScrollRef = useAnimatedRef();
+	const { left, right } = useSafeAreaInsets();
+	const { width } = useSafeAreaFrame();
+	const safeAreaOffset = left + right;
+	const contentWidth = width - safeAreaOffset;
 	animatedScrollRef( scrollRef );
 
 	const scroll = {
@@ -198,9 +206,16 @@ const BlockDraggableWrapper = ( { children } ) => {
 	};
 
 	const chipDynamicStyles = useAnimatedStyle( () => {
+		const chipOffset = chip.width.value / 2;
+		const translateX = ! isRTL
+			? chip.x.value - chipOffset
+			: -( contentWidth - ( chip.x.value + chipOffset ) );
+
 		return {
 			transform: [
-				{ translateX: chip.x.value - chip.width.value / 2 },
+				{
+					translateX,
+				},
 				{
 					translateY:
 						chip.y.value -
@@ -215,6 +230,34 @@ const BlockDraggableWrapper = ( { children } ) => {
 		styles[ 'draggable-chip__wrapper' ],
 	];
 
+	const exitingAnimation = ( { currentHeight, currentWidth } ) => {
+		'worklet';
+		const translateX = ! isRTL ? 0 : currentWidth * -1;
+		const duration = 150;
+		const animations = {
+			transform: [
+				{
+					translateY: withTiming( currentHeight, {
+						duration,
+					} ),
+				},
+				{
+					translateX: withTiming( translateX, {
+						duration,
+					} ),
+				},
+				{ scale: withTiming( 0, { duration } ) },
+			],
+		};
+		const initialValues = {
+			transform: [ { translateY: 0 }, { translateX }, { scale: 1 } ],
+		};
+		return {
+			initialValues,
+			animations,
+		};
+	};
+
 	return (
 		<>
 			<DroppingInsertionPoint
@@ -238,7 +281,7 @@ const BlockDraggableWrapper = ( { children } ) => {
 				{ draggedBlockIcon && (
 					<Animated.View
 						entering={ ZoomInEasyDown.duration( 200 ) }
-						exiting={ ZoomOutEasyDown.duration( 150 ) }
+						exiting={ exitingAnimation }
 					>
 						<DraggableChip icon={ draggedBlockIcon } />
 					</Animated.View>
diff --git a/packages/block-editor/src/components/block-list/index.native.js b/packages/block-editor/src/components/block-list/index.native.js
index a4248327589ed..788ec01b59bb6 100644
--- a/packages/block-editor/src/components/block-list/index.native.js
+++ b/packages/block-editor/src/components/block-list/index.native.js
@@ -190,7 +190,7 @@ export class BlockList extends Component {
 	}
 
 	render() {
-		const { isRootList } = this.props;
+		const { isRootList, isRTL } = this.props;
 		// Use of Context to propagate the main scroll ref to its children e.g InnerBlocks.
 		const blockList = isRootList ? (
 			<BlockListProvider
@@ -199,7 +199,7 @@ export class BlockList extends Component {
 					scrollRef: this.scrollViewRef,
 				} }
 			>
-				<BlockDraggableWrapper>
+				<BlockDraggableWrapper isRTL={ isRTL }>
 					{ ( { onScroll } ) => this.renderList( { onScroll } ) }
 				</BlockDraggableWrapper>
 			</BlockListProvider>
@@ -439,6 +439,8 @@ export default compose( [
 
 			const isFloatingToolbarVisible =
 				!! selectedBlockClientId && hasRootInnerBlocks;
+			const isRTL = getSettings().isRTL;
+
 			return {
 				blockClientIds,
 				blockCount,
@@ -449,6 +451,7 @@ export default compose( [
 				isFloatingToolbarVisible,
 				isStackedHorizontally,
 				maxWidth,
+				isRTL,
 			};
 		}
 	),