From 722f32a0056f4565ab7efd8c4a3220e413f8c7a4 Mon Sep 17 00:00:00 2001
From: Juwon Jeong <juwon.jeong@lge.com>
Date: Fri, 27 Dec 2024 15:42:21 +0900
Subject: [PATCH] WRR-14337: Fix EditableWrapper to enable hover to scroll in
 touch mode

Enact-DCO-1.0-Signed-off-by: Juwon Jeong (juwon.jeong@lge.com)
---
 Scroller/EditableWrapper.js         | 36 ++++++++++++++----
 useScroll/HoverToScroll.js          | 58 ++++++++++++++---------------
 useScroll/HoverToScroll.module.less |  3 ++
 3 files changed, 58 insertions(+), 39 deletions(-)

diff --git a/Scroller/EditableWrapper.js b/Scroller/EditableWrapper.js
index 342c31882f..ef74580047 100644
--- a/Scroller/EditableWrapper.js
+++ b/Scroller/EditableWrapper.js
@@ -542,6 +542,16 @@ const EditableWrapper = (props) => {
 		return Math.floor((clientXFromContent - moveTolerance) / itemWidth);
 	}, [scrollContainerHandle, scrollContentRef]);
 
+	const handlePointerDown = useCallback((ev) => {
+		const {selectedItem} = mutableRef.current;
+
+		if (selectedItem) {
+			if (ev.target.hasPointerCapture(ev.pointerId)) {
+				ev.target.releasePointerCapture(ev.pointerId);
+			}
+		}
+	}, []);
+
 	const handleMouseMove = useCallback((ev) => {
 		const {clientX} = ev;
 		mutableRef.current.lastMouseClientX = clientX;
@@ -735,23 +745,23 @@ const EditableWrapper = (props) => {
 		if (mutableRef.current.isDraggingItem && ev.target?.parentNode?.parentNode.getAttribute('role') !== 'button') {
 			const {clientX} = ev.targetTouches[0];
 			mutableRef.current.lastMouseClientX = clientX;
+			scrollContainerRef.current.style.setProperty('--scroller-hover-to-scroll-by-touch', 'auto');
 
 			const toIndex = getNextIndexFromPosition(clientX, 0.33);
 
 			if (toIndex !== mutableRef.current.prevToIndex) {
-				scrollContainerHandle.current.start({
-					targetX: clientX,
-					targetY: 0
-				});
 				mutableRef.current.lastInputType = 'touch';
 				moveItems(toIndex);
 			}
 		}
-
-	}, [getNextIndexFromPosition, moveItems, scrollContainerHandle]);
+	}, [getNextIndexFromPosition, moveItems, scrollContainerRef]);
 
 	const handleTouchEnd = useCallback((ev) => {
-		const {selectedItem} = mutableRef.current;
+		const {itemWidth, lastInputType, lastMouseClientX, selectedItem} = mutableRef.current;
+		const {rtl} = scrollContainerHandle.current;
+		const scrollContentNode = scrollContentRef.current;
+		const scrollContentCenter = scrollContentNode.getBoundingClientRect().width / 2;
+
 		const {clientX} = ev.changedTouches[0];
 		const targetItemIndex = getNextIndexFromPosition(clientX, 0);
 
@@ -766,6 +776,14 @@ const EditableWrapper = (props) => {
 			// Finalize orders and forward `onComplete` event
 			const orders = finalizeOrders();
 			finalizeEditing(orders);
+
+			if (lastInputType === 'scroll' && mutableRef.current.isDragging) {
+				const offset = itemWidth * (!rtl ^ !(lastMouseClientX > scrollContentCenter) ? 1 : -1);
+				scrollContainerHandle.current.start({
+					targetX: scrollContentNode.scrollLeft + offset,
+					targetY: 0
+				});
+			}
 		} else if (!mutableRef.current.isDragging) {
 			// Cancel mouse event to select a item when it is tapped
 			ev.preventDefault();
@@ -780,7 +798,8 @@ const EditableWrapper = (props) => {
 		}
 		mutableRef.current.isDraggingItem = false;
 		mutableRef.current.isDragging = false;
-	}, [getNextIndexFromPosition, finalizeEditing, finalizeOrders, findItemNode, selectItemBy, startEditing]);
+		scrollContainerRef.current.style.setProperty('--scroller-hover-to-scroll-by-touch', 'none');
+	}, [getNextIndexFromPosition, finalizeEditing, finalizeOrders, findItemNode, scrollContainerHandle, scrollContainerRef, scrollContentRef, selectItemBy, startEditing]);
 
 	const handleDragStart = useCallback((ev) => {
 		const {selectedItem} = mutableRef.current;
@@ -952,6 +971,7 @@ const EditableWrapper = (props) => {
 			onKeyUpCapture={handleKeyUpCapture}
 			onMouseDown={handleMouseDown}
 			onMouseMove={handleMouseMove}
+			onPointerDown={handlePointerDown}
 			onDragStart={handleDragStart}
 			onTouchEnd={handleTouchEnd}
 			ref={wrapperRef}
diff --git a/useScroll/HoverToScroll.js b/useScroll/HoverToScroll.js
index e16847b869..b1b5de5898 100644
--- a/useScroll/HoverToScroll.js
+++ b/useScroll/HoverToScroll.js
@@ -7,8 +7,6 @@ import classNames from 'classnames';
 import PropTypes from 'prop-types';
 import {useCallback, useLayoutEffect, useRef, useState} from 'react';
 
-import {getLastInputType} from '../ThemeDecorator';
-
 import css from './HoverToScroll.module.less';
 
 const {epsilon} = constants;
@@ -117,35 +115,33 @@ const HoverToScrollBase = (props) => {
 			const {axis, clientSize, maxPosition, scrollPosition} = getBoundsPropertyNames(direction);
 			const bounds = scrollContainer.getScrollBounds();
 
-			return function ({pointerType}) {
-				if (pointerType === 'mouse') {
-					const distance =
-						(position === 'before' ? -1 : 1) * // scroll direction
-						bounds[clientSize] * // scroll page size
-						hoverToScrollMultiplier[direction]; // a scrolling speed factor
-
-					mutableRef.current.hoveredPosition = position;
-					mutableRef.current.stopScrollByHover = false;
-
-					const scrollByHover = () => {
-						if (!mutableRef.current.stopScrollByHover && getLastInputType() === 'mouse') {
-							scrollContainer.scrollTo({
-								position: {
-									[axis]: clamp(
-										0,
-										bounds[maxPosition],
-										scrollContainer[scrollPosition] + distance
-									)
-								},
-								animate: false
-							});
-							startRaf(scrollByHover);
-						} else {
-							stopRaf(); // for other type input during hovering
-						}
-					};
-					startRaf(scrollByHover);
-				}
+			return function () {
+				const distance =
+					(position === 'before' ? -1 : 1) * // scroll direction
+					bounds[clientSize] * // scroll page size
+					hoverToScrollMultiplier[direction]; // a scrolling speed factor
+
+				mutableRef.current.hoveredPosition = position;
+				mutableRef.current.stopScrollByHover = false;
+
+				const scrollByHover = () => {
+					if (!mutableRef.current.stopScrollByHover) {
+						scrollContainer.scrollTo({
+							position: {
+								[axis]: clamp(
+									0,
+									bounds[maxPosition],
+									scrollContainer[scrollPosition] + distance
+								)
+							},
+							animate: false
+						});
+						startRaf(scrollByHover);
+					} else {
+						stopRaf(); // for other type input during hovering
+					}
+				};
+				startRaf(scrollByHover);
 			};
 		} else {
 			return nop;
diff --git a/useScroll/HoverToScroll.module.less b/useScroll/HoverToScroll.module.less
index e3e8affbd4..aadfa0ed09 100644
--- a/useScroll/HoverToScroll.module.less
+++ b/useScroll/HoverToScroll.module.less
@@ -10,6 +10,9 @@
 	:global(.spotlight-input-mouse) & {
 		pointer-events: auto;
 	}
+	:global(.spotlight-input-touch) & {
+		pointer-events: var(--scroller-hover-to-scroll-by-touch, none)
+	}
 	&.vertical {
 		width: 100%;
 		height: @sand-scroll-hover-area-size;