From d5609abf25fa4c0b6773d123ed41577b7de9b0b2 Mon Sep 17 00:00:00 2001
From: syuilo <4439005+syuilo@users.noreply.github.com>
Date: Thu, 9 Jul 2026 22:02:37 +0900
Subject: [PATCH] wip

---
 .../src/components/MkImageGallery.item.vue    | 48 +++++++++++++++----
 .../src/components/MkImageGallery.vue         | 38 +++++++--------
 .../frontend/src/components/MkMediaList.vue   |  3 +-
 3 files changed, 58 insertions(+), 31 deletions(-)

diff --git a/packages/frontend/src/components/MkImageGallery.item.vue b/packages/frontend/src/components/MkImageGallery.item.vue
index 1c66f5ac17..30af595707 100644
--- a/packages/frontend/src/components/MkImageGallery.item.vue
+++ b/packages/frontend/src/components/MkImageGallery.item.vue
@@ -12,17 +12,30 @@ SPDX-License-Identifier: AGPL-3.0-only
 	@pointerup="onPointerup"
 	@touchstart="onTouchstart"
 	@touchmove="onTouchmove"
+	@wheel="onWheel"
 >
 	<div :style="{ transform: `translate3d(${translation.x}px, ${translation.y}px, 0)` }">
 		<img
-			ref="imageEl"
-			:class="$style.image"
-			:src="image.src"
+			v-if="!originalImageLoaded"
+			:class="[$style.image, $style.thumbnail]"
+			:src="image.thumbnailUrl"
 			:width="size.width"
 			:height="size.height"
 			draggable="false"
-			@wheel="onWheel"
 		>
+		<img
+			v-if="activated"
+			ref="imageEl"
+			:class="[$style.image, $style.original]"
+			:src="image.url"
+			:width="size.width"
+			:height="size.height"
+			draggable="false"
+			@load="originalImageLoaded = true"
+		>
+	</div>
+	<div v-if="activated && !originalImageLoaded" :class="$style.loading">
+		<MkLoading/>
 	</div>
 </div>
 </template>
@@ -34,9 +47,10 @@ import { i18n } from '@/i18n.js';
 import { makeDoubleTapDetector } from '@/utility/double-tap.js';
 import { beginAnimation, easing_easeInOutQuad } from '@/utility/animation.js';
 
-type Image = {
+export type Image = {
 	id: string;
-	src: string;
+	url: string;
+	thumbnailUrl: string;
 	width: number;
 	height: number;
 	sourceElement?: HTMLElement;
@@ -44,6 +58,7 @@ type Image = {
 
 const props = withDefaults(defineProps<{
 	image: Image;
+	activated: boolean;
 }>(), {
 });
 
@@ -58,6 +73,8 @@ const emit = defineEmits<{
 const rootEl = useTemplateRef('rootEl');
 const imageEl = useTemplateRef('imageEl');
 
+const originalImageLoaded = ref(false);
+
 const padding = 30;
 const ANIMATION_DURATION = 200;
 
@@ -217,7 +234,7 @@ let pointerVec = { x: 0, y: 0 };
 
 function onPointerdown(ev: PointerEvent) {
 	pointerEventCache.set(ev.pointerId, ev);
-	imageEl.value.setPointerCapture(ev.pointerId);
+	rootEl.value.setPointerCapture(ev.pointerId);
 
 	isDragging = true;
 	lastX = ev.clientX;
@@ -298,7 +315,7 @@ function onPointermove(ev: PointerEvent) {
 
 function onPointerup(ev: PointerEvent) {
 	pointerEventCache.delete(ev.pointerId);
-	imageEl.value.releasePointerCapture(ev.pointerId);
+	rootEl.value.releasePointerCapture(ev.pointerId);
 	prevTwoTouchPointsDistance = 0;
 	isDragging = false;
 	if (currentPointerId === ev.pointerId) {
@@ -396,5 +413,20 @@ onBeforeUnmount(() => {
 	display: block;
 	-webkit-touch-callout: none;
 	user-select: none;
+	position: absolute;
+	top: 0;
+	left: 0;
+}
+
+.loading {
+	position: absolute;
+	top: 0;
+	left: 0;
+	width: 100%;
+	height: 100%;
+	z-index: 2;
+	display: grid;
+	place-items: center;
+	pointer-events: none;
 }
 </style>
diff --git a/packages/frontend/src/components/MkImageGallery.vue b/packages/frontend/src/components/MkImageGallery.vue
index ea30694e8e..37c758f367 100644
--- a/packages/frontend/src/components/MkImageGallery.vue
+++ b/packages/frontend/src/components/MkImageGallery.vue
@@ -8,9 +8,10 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<div :class="[$style.bg]"></div>
 	<div ref="mainEl" :class="$style.main">
 		<div ref="itemsEl" :class="$style.items" :style="{ left: `${imagesOffset}px` }">
-			<div v-for="image in images" :key="image.src" ref="itemEl" :class="$style.item">
+			<div v-for="(image, i) in images" :key="image.url" ref="itemEl" :class="$style.item">
 				<XItem
 					:image="image"
+					:activated="activatedIndexes.has(i)"
 					@close="onItemClose"
 					@horizontalSwipe="onHorizontalSwipe"
 					@prev="onPrev"
@@ -24,20 +25,13 @@ SPDX-License-Identifier: AGPL-3.0-only
 </template>
 
 <script lang="ts" setup>
-import { nextTick, onMounted, onUnmounted, ref, useTemplateRef } from 'vue';
+import { nextTick, onMounted, onUnmounted, ref, useTemplateRef, watch } from 'vue';
 import XItem from './MkImageGallery.item.vue';
+import type { Image } from './MkImageGallery.item.vue';
 import * as os from '@/os.js';
 import { i18n } from '@/i18n.js';
 import { beginAnimation, easing_easeInOutQuad } from '@/utility/animation.js';
 
-type Image = {
-	id: string;
-	src: string;
-	width: number;
-	height: number;
-	sourceElement?: HTMLElement;
-};
-
 const props = withDefaults(defineProps<{
 	defaultIndex?: number;
 	images: Image[];
@@ -48,15 +42,15 @@ const emit = defineEmits<{
 	(ev: 'closed'): void;
 }>();
 
-let currentIndex = props.defaultIndex ?? 0;
+const activatedIndexes = ref(new Set<number>());
+const currentIndex = ref(props.defaultIndex ?? 0);
+watch(currentIndex, (newIndex) => {
+	activatedIndexes.value.add(newIndex);
+}, { immediate: true });
 
-const rootEl = useTemplateRef('rootEl');
-const mainEl = useTemplateRef('mainEl');
-const itemsEl = useTemplateRef('itemsEl');
-const itemEl = useTemplateRef('itemEl');
 const zIndex = os.claimZIndex('high');
 const screenWidth = ref(window.innerWidth);
-const imagesOffset = ref(currentIndex * -window.innerWidth);
+const imagesOffset = ref(currentIndex.value * -window.innerWidth);
 let currentScrollLeft = imagesOffset.value;
 
 function onHorizontalSwipe(offset: number) {
@@ -64,10 +58,10 @@ function onHorizontalSwipe(offset: number) {
 }
 
 function scrollToCurrentIndex() {
-	currentScrollLeft = currentIndex * -screenWidth.value;
+	currentScrollLeft = currentIndex.value * -screenWidth.value;
 	beginAnimation({
 		from: { value: imagesOffset.value },
-		to: { value: currentIndex * -screenWidth.value },
+		to: { value: currentIndex.value * -screenWidth.value },
 		duration: 300,
 		easing: easing_easeInOutQuad,
 		apply: ({ value }) => {
@@ -81,15 +75,15 @@ function onCancelHorizontalSwipe() {
 }
 
 function onNext() {
-	if (currentIndex < props.images.length - 1) {
-		currentIndex++;
+	if (currentIndex.value < props.images.length - 1) {
+		currentIndex.value++;
 	}
 	scrollToCurrentIndex();
 }
 
 function onPrev() {
-	if (currentIndex > 0) {
-		currentIndex--;
+	if (currentIndex.value > 0) {
+		currentIndex.value--;
 	}
 	scrollToCurrentIndex();
 }
diff --git a/packages/frontend/src/components/MkMediaList.vue b/packages/frontend/src/components/MkMediaList.vue
index c5e83db03f..3ab155b8df 100644
--- a/packages/frontend/src/components/MkMediaList.vue
+++ b/packages/frontend/src/components/MkMediaList.vue
@@ -96,7 +96,8 @@ const previewable = (file: Misskey.entities.DriveFile): boolean => {
 async function openGallery(id: string) {
 	const images = props.mediaList.filter(media => previewable(media)).map(media => ({
 		id: media.id,
-		src: media.url,
+		url: media.url,
+		thumbnailUrl: media.thumbnailUrl,
 		width: media.properties.width ?? 0,
 		height: media.properties.height ?? 0,
 		sourceElement: gallery.value?.querySelector(`.image[data-id="${media.id}"]`) as HTMLElement | undefined,