feat(frontend): マウスでもタイムラインを引っ張って更新できるように & MkPullToRefreshのパフォーマンス向上

1 files changed, 82 insertions, 85 deletions

diff --git a/packages/frontend/src/components/MkPullToRefresh.vue b/packages/frontend/src/components/MkPullToRefresh.vue
index 22ae563d13..ad828c50b6 100644
--- a/packages/frontend/src/components/MkPullToRefresh.vue
+++ b/packages/frontend/src/components/MkPullToRefresh.vue
@@ -5,12 +5,12 @@ SPDX-License-Identifier: AGPL-3.0-only
 
 <template>
 <div ref="rootEl">
-	<div v-if="isPullStart" :class="$style.frame" :style="`--frame-min-height: ${pullDistance / (PULL_BRAKE_BASE + (pullDistance / PULL_BRAKE_FACTOR))}px;`">
+	<div v-if="isPulling" :class="$style.frame" :style="`--frame-min-height: ${pullDistance / (PULL_BRAKE_BASE + (pullDistance / PULL_BRAKE_FACTOR))}px;`">
 		<div :class="$style.frameContent">
 			<MkLoading v-if="isRefreshing" :class="$style.loader" :em="true"/>
-			<i v-else class="ti ti-arrow-bar-to-down" :class="[$style.icon, { [$style.refresh]: isPullEnd }]"></i>
+			<i v-else class="ti ti-arrow-bar-to-down" :class="[$style.icon, { [$style.refresh]: isPulledEnough }]"></i>
 			<div :class="$style.text">
-				<template v-if="isPullEnd">{{ i18n.ts.releaseToRefresh }}</template>
+				<template v-if="isPulledEnough">{{ i18n.ts.releaseToRefresh }}</template>
 				<template v-else-if="isRefreshing">{{ i18n.ts.refreshing }}</template>
 				<template v-else>{{ i18n.ts.pullDownToRefresh }}</template>
 			</div>
@@ -34,19 +34,16 @@ const RELEASE_TRANSITION_DURATION = 200;
 const PULL_BRAKE_BASE = 1.5;
 const PULL_BRAKE_FACTOR = 170;
 
-const isPullStart = ref(false);
-const isPullEnd = ref(false);
+const isPulling = ref(false);
+const isPulledEnough = ref(false);
 const isRefreshing = ref(false);
 const pullDistance = ref(0);
 
-let supportPointerDesktop = false;
 let startScreenY: number | null = null;
 
 const rootEl = useTemplateRef('rootEl');
 let scrollEl: HTMLElement | null = null;
 
-let disabled = false;
-
 const props = withDefaults(defineProps<{
 	refresher: () => Promise<void>;
 }>(), {
@@ -57,18 +54,51 @@ const emit = defineEmits<{
 	(ev: 'refresh'): void;
 }>();
 
-function getScreenY(event) {
-	if (supportPointerDesktop) {
+function getScreenY(event: TouchEvent | MouseEvent | PointerEvent): number {
+	if (event.touches && event.touches[0] && event.touches[0].screenY != null) {
+		return event.touches[0].screenY;
+	} else {
 		return event.screenY;
 	}
-	return event.touches[0].screenY;
 }
 
-function moveStart(event) {
-	if (!isPullStart.value && !isRefreshing.value && !disabled) {
-		isPullStart.value = true;
-		startScreenY = getScreenY(event);
-		pullDistance.value = 0;
+// When at the top of the page, disable vertical overscroll so passive touch listeners can take over.
+function lockDownScroll() {
+	scrollEl!.style.touchAction = 'pan-x pan-down pinch-zoom';
+	scrollEl!.style.overscrollBehavior = 'none';
+}
+
+function unlockDownScroll() {
+	scrollEl!.style.touchAction = 'auto';
+	scrollEl!.style.overscrollBehavior = 'contain';
+}
+
+function moveStart(event: PointerEvent) {
+	const scrollPos = scrollEl!.scrollTop;
+	if (scrollPos === 0) {
+		lockDownScroll();
+		if (!isPulling.value && !isRefreshing.value) {
+			isPulling.value = true;
+			startScreenY = getScreenY(event);
+			pullDistance.value = 0;
+
+			// タッチデバイスでPointerEventを使うとなんか挙動がおかしいので、TouchEventとMouseEventを使い分ける
+			if (event.pointerType === 'mouse') {
+				window.addEventListener('mousemove', moving, { passive: true });
+				window.addEventListener('mouseup', () => {
+					window.removeEventListener('mousemove', moving);
+					onPullRelease();
+				}, { passive: true, once: true });
+			} else {
+				window.addEventListener('touchmove', moving, { passive: true });
+				window.addEventListener('touchend', () => {
+					window.removeEventListener('touchmove', moving);
+					onPullRelease();
+				}, { passive: true, once: true });
+			}
+		}
+	} else {
+		unlockDownScroll();
 	}
 }
 
@@ -108,31 +138,39 @@ async function closeContent() {
 	}
 }
 
-function moveEnd() {
-	if (isPullStart.value && !isRefreshing.value) {
-		startScreenY = null;
-		if (isPullEnd.value) {
-			isPullEnd.value = false;
-			isRefreshing.value = true;
-			fixOverContent().then(() => {
-				emit('refresh');
-				props.refresher().then(() => {
-					refreshFinished();
-				});
+function onPullRelease() {
+	window.document.body.removeAttribute('inert');
+	startScreenY = null;
+	if (isPulledEnough.value) {
+		isPulledEnough.value = false;
+		isRefreshing.value = true;
+		fixOverContent().then(() => {
+			emit('refresh');
+			props.refresher().then(() => {
+				refreshFinished();
 			});
-		} else {
-			closeContent().then(() => isPullStart.value = false);
-		}
+		});
+	} else {
+		closeContent().then(() => isPulling.value = false);
 	}
 }
 
-function moving(event: TouchEvent | PointerEvent) {
-	if (!isPullStart.value || isRefreshing.value || disabled) return;
+function toggleScrollLockOnTouchEnd() {
+	const scrollPos = scrollEl!.scrollTop;
+	if (scrollPos === 0) {
+		lockDownScroll();
+	} else {
+		unlockDownScroll();
+	}
+}
 
-	if ((scrollEl?.scrollTop ?? 0) > (supportPointerDesktop ? SCROLL_STOP : SCROLL_STOP + pullDistance.value) || isHorizontalSwipeSwiping.value) {
+function moving(event: MouseEvent | TouchEvent) {
+	if (!isPulling.value || isRefreshing.value) return;
+
+	if ((scrollEl?.scrollTop ?? 0) > SCROLL_STOP + pullDistance.value || isHorizontalSwipeSwiping.value) {
 		pullDistance.value = 0;
-		isPullEnd.value = false;
-		moveEnd();
+		isPulledEnough.value = false;
+		onPullRelease();
 		return;
 	}
 
@@ -144,15 +182,12 @@ function moving(event: TouchEvent | PointerEvent) {
 	const moveHeight = moveScreenY - startScreenY!;
 	pullDistance.value = Math.min(Math.max(moveHeight, 0), MAX_PULL_DISTANCE);
 
-	if (pullDistance.value > 0) {
-		if (event.cancelable) event.preventDefault();
+	// マウスでのpull時、画面上のテキスト選択が発生して画面がスクロールされたりするのを防ぐ
+	if (pullDistance.value > 3) { // ある程度遊びを持たせないと通常のクリックでも発火しクリックできなくなる
+		window.document.body.setAttribute('inert', 'true');
 	}
 
-	if (pullDistance.value > SCROLL_STOP) {
-		event.stopPropagation();
-	}
-
-	isPullEnd.value = pullDistance.value >= FIRE_THRESHOLD;
+	isPulledEnough.value = pullDistance.value >= FIRE_THRESHOLD;
 }
 
 /**
@@ -162,61 +197,23 @@ function moving(event: TouchEvent | PointerEvent) {
  */
 function refreshFinished() {
 	closeContent().then(() => {
-		isPullStart.value = false;
+		isPulling.value = false;
 		isRefreshing.value = false;
 	});
 }
 
-function setDisabled(value) {
-	disabled = value;
-}
-
-function onScrollContainerScroll() {
-	const scrollPos = scrollEl!.scrollTop;
-
-	// When at the top of the page, disable vertical overscroll so passive touch listeners can take over.
-	if (scrollPos === 0) {
-		scrollEl!.style.touchAction = 'pan-x pan-down pinch-zoom';
-		registerEventListenersForReadyToPull();
-	} else {
-		scrollEl!.style.touchAction = 'auto';
-		unregisterEventListenersForReadyToPull();
-	}
-}
-
-function registerEventListenersForReadyToPull() {
-	if (rootEl.value == null) return;
-	rootEl.value.addEventListener('touchstart', moveStart, { passive: true });
-	rootEl.value.addEventListener('touchmove', moving, { passive: false }); // passive: falseにしないとpreventDefaultが使えない
-}
-
-function unregisterEventListenersForReadyToPull() {
-	if (rootEl.value == null) return;
-	rootEl.value.removeEventListener('touchstart', moveStart);
-	rootEl.value.removeEventListener('touchmove', moving);
-}
-
 onMounted(() => {
 	if (rootEl.value == null) return;
 
 	scrollEl = getScrollContainer(rootEl.value);
-	if (scrollEl == null) return;
 
-	scrollEl.addEventListener('scroll', onScrollContainerScroll, { passive: true });
-
-	rootEl.value.addEventListener('touchend', moveEnd, { passive: true });
-
-	registerEventListenersForReadyToPull();
+	rootEl.value.addEventListener('pointerdown', moveStart, { passive: true });
+	rootEl.value.addEventListener('touchend', toggleScrollLockOnTouchEnd, { passive: true });
 });
 
 onUnmounted(() => {
-	if (scrollEl) scrollEl.removeEventListener('scroll', onScrollContainerScroll);
-
-	unregisterEventListenersForReadyToPull();
-});
-
-defineExpose({
-	setDisabled,
+	rootEl.value.removeEventListener('pointerdown', moveStart);
+	rootEl.value.removeEventListener('touchend', toggleScrollLockOnTouchEnd);
 });
 </script>