perf: 长列表渐进式渲染优化与播放栏遮挡修复 (#589)

4everWZ · algerkong · commit 7759d9b23a65 · 2026-04-08T20:04:40.000+08:00
- 新增 useProgressiveRender composable，提取手工虚拟化逻辑（renderLimit + placeholderHeight） - FavoritePage/DownloadPage 使用 composable 实现渐进式渲染，避免大量 DOM 一次性渲染 - MusicListPage 初始加载扩大至 200 首，工具栏按钮添加 n-tooltip，新增回到顶部按钮 - 播放栏动态底部间距替代 PlayBottom 组件，修复播放时列表底部被遮挡 - 下载页无下载任务时自动切换到已下载 tab - i18n: 添加 scrollToTop/compactLayout/normalLayout 翻译（5 种语言） Inspired-By: #589
diff --git a/src/i18n/lang/en-US/comp.ts b/src/i18n/lang/en-US/comp.ts
@@ -223,6 +223,9 @@ export default {
     operationFailed: 'Operation Failed',
     songsAlreadyInPlaylist: 'Songs already in playlist',
     locateCurrent: 'Locate current song',
+    scrollToTop: 'Scroll to top',
+    compactLayout: 'Compact layout',
+    normalLayout: 'Normal layout',
     historyRecommend: 'Daily History',
     fetchDatesFailed: 'Failed to fetch dates',
     fetchSongsFailed: 'Failed to fetch songs',
diff --git a/src/i18n/lang/ja-JP/comp.ts b/src/i18n/lang/ja-JP/comp.ts
@@ -223,6 +223,9 @@ export default {
     addToPlaylistSuccess: 'プレイリストに追加しました',
     songsAlreadyInPlaylist: '楽曲は既にプレイリストに存在します',
     locateCurrent: '再生中の曲を表示',
+    scrollToTop: 'トップに戻る',
+    compactLayout: 'コンパクト表示',
+    normalLayout: '通常表示',
     historyRecommend: '履歴の日次推薦',
     fetchDatesFailed: '日付リストの取得に失敗しました',
     fetchSongsFailed: '楽曲リストの取得に失敗しました',
diff --git a/src/i18n/lang/ko-KR/comp.ts b/src/i18n/lang/ko-KR/comp.ts
@@ -222,6 +222,9 @@ export default {
     addToPlaylistSuccess: '재생 목록에 추가 성공',
     songsAlreadyInPlaylist: '곡이 이미 재생 목록에 있습니다',
     locateCurrent: '현재 재생 곡 찾기',
+    scrollToTop: '맨 위로',
+    compactLayout: '간결한 레이아웃',
+    normalLayout: '일반 레이아웃',
     historyRecommend: '일일 기록 권장',
     fetchDatesFailed: '날짜를 가져오지 못했습니다',
     fetchSongsFailed: '곡을 가져오지 못했습니다',
diff --git a/src/i18n/lang/zh-CN/comp.ts b/src/i18n/lang/zh-CN/comp.ts
@@ -216,6 +216,9 @@ export default {
     addToPlaylistSuccess: '添加到播放列表成功',
     songsAlreadyInPlaylist: '歌曲已存在于播放列表中',
     locateCurrent: '定位当前播放',
+    scrollToTop: '回到顶部',
+    compactLayout: '紧凑布局',
+    normalLayout: '常规布局',
     historyRecommend: '历史日推',
     fetchDatesFailed: '获取日期列表失败',
     fetchSongsFailed: '获取歌曲列表失败',
diff --git a/src/i18n/lang/zh-Hant/comp.ts b/src/i18n/lang/zh-Hant/comp.ts
@@ -216,6 +216,9 @@ export default {
     addToPlaylistSuccess: '新增至播放清單成功',
     songsAlreadyInPlaylist: '歌曲已存在於播放清單中',
     locateCurrent: '定位當前播放',
+    scrollToTop: '回到頂部',
+    compactLayout: '緊湊佈局',
+    normalLayout: '常規佈局',
     historyRecommend: '歷史日推',
     fetchDatesFailed: '獲取日期列表失敗',
     fetchSongsFailed: '獲取歌曲列表失敗',
diff --git a/src/renderer/hooks/useProgressiveRender.ts b/src/renderer/hooks/useProgressiveRender.ts
@@ -0,0 +1,96 @@
+import { computed, type ComputedRef, type Ref,ref } from 'vue';
+
+import { usePlayerStore } from '@/store';
+import { isMobile } from '@/utils';
+
+type ProgressiveRenderOptions = {
+  /** 全量数据列表 */
+  items: ComputedRef<any[]> | Ref<any[]>;
+  /** 每项估算高度（px） */
+  itemHeight: ComputedRef<number> | number;
+  /** 列表区域的 CSS 选择器，用于计算偏移 */
+  listSelector: string;
+  /** 初始渲染数量 */
+  initialCount?: number;
+  /** 滚动到底部时的回调（用于加载更多数据） */
+  onReachEnd?: () => void;
+};
+
+export const useProgressiveRender = (options: ProgressiveRenderOptions) => {
+  const { items, itemHeight, listSelector, initialCount = 40, onReachEnd } = options;
+
+  const playerStore = usePlayerStore();
+  const renderLimit = ref(initialCount);
+
+  const getItemHeight = () => (typeof itemHeight === 'number' ? itemHeight : itemHeight.value);
+
+  /** 截取到 renderLimit 的可渲染列表 */
+  const renderedItems = computed(() => {
+    const all = items.value;
+    return all.slice(0, renderLimit.value);
+  });
+
+  /** 未渲染项的占位高度，让滚动条反映真实总高度 */
+  const placeholderHeight = computed(() => {
+    const unrendered = items.value.length - renderedItems.value.length;
+    return Math.max(0, unrendered) * getItemHeight();
+  });
+
+  /** 是否正在播放（用于动态底部间距） */
+  const isPlaying = computed(() => !!playerStore.playMusicUrl);
+
+  /** 内容区底部 padding，播放时留出播放栏空间 */
+  const contentPaddingBottom = computed(() =>
+    isPlaying.value && !isMobile.value ? '220px' : '80px'
+  );
+
+  /** 重置渲染限制 */
+  const resetRenderLimit = () => {
+    renderLimit.value = initialCount;
+  };
+
+  /** 扩展渲染限制到指定索引 */
+  const expandTo = (index: number) => {
+    renderLimit.value = Math.max(renderLimit.value, index);
+  };
+
+  /**
+   * 滚动事件处理函数，挂载到外层 n-scrollbar 的 @scroll
+   * 根据可视区域动态扩展 renderLimit
+   */
+  const handleScroll = (e: Event) => {
+    const target = e.target as HTMLElement;
+    const { scrollTop, clientHeight } = target;
+
+    const listSection = document.querySelector(listSelector) as HTMLElement;
+    const listStart = listSection?.offsetTop || 0;
+
+    const visibleBottom = scrollTop + clientHeight - listStart;
+    if (visibleBottom <= 0) return;
+
+    // 多渲染一屏作为缓冲
+    const bufferHeight = clientHeight;
+    const neededIndex = Math.ceil((visibleBottom + bufferHeight) / getItemHeight());
+    const allCount = items.value.length;
+
+    if (neededIndex > renderLimit.value) {
+      renderLimit.value = Math.min(neededIndex, allCount);
+    }
+
+    // 所有项都已渲染，通知外部加载更多数据
+    if (renderLimit.value >= allCount && onReachEnd) {
+      onReachEnd();
+    }
+  };
+
+  return {
+    renderLimit,
+    renderedItems,
+    placeholderHeight,
+    isPlaying,
+    contentPaddingBottom,
+    resetRenderLimit,
+    expandTo,
+    handleScroll
+  };
+};
diff --git a/src/renderer/views/download/DownloadPage.vue b/src/renderer/views/download/DownloadPage.vue
@@ -1,7 +1,7 @@
 <template>
   <div class="download-page h-full w-full bg-white dark:bg-black transition-colors duration-500">
-    <n-scrollbar class="h-full">
-      <div class="download-content pb-32">
+    <n-scrollbar ref="scrollbarRef" class="h-full" @scroll="handleDownloadScroll">
+      <div class="download-content" :style="{ paddingBottom: contentPaddingBottom }">
         <!-- Hero Section -->
         <section class="hero-section relative overflow-hidden rounded-tl-2xl">
           <!-- Background with Blur -->
@@ -210,86 +210,96 @@
                 </p>
               </div>
               <div v-else class="space-y-2">
-                <div
-                  v-for="(item, index) in downloadStore.completedList"
-                  :key="item.path || item.filePath"
-                  class="downloaded-item group animate-item p-3 rounded-2xl flex items-center gap-4 hover:bg-neutral-100 dark:hover:bg-neutral-900 transition-all"
-                  :style="{ animationDelay: `${index * 0.03}s` }"
-                >
+                <div class="downloaded-list-section">
                   <div
-                    class="relative w-12 h-12 rounded-xl overflow-hidden shadow-lg flex-shrink-0"
+                    v-for="(item, index) in renderedDownloaded"
+                    :key="item.path || item.filePath"
+                    class="downloaded-item group p-3 rounded-2xl flex items-center gap-4 hover:bg-neutral-100 dark:hover:bg-neutral-900 transition-all"
+                    :class="{ 'animate-item': index < 20 }"
+                    :style="index < 20 ? { animationDelay: `${index * 0.03}s` } : undefined"
                   >
-                    <img
-                      :src="getImgUrl(item.picUrl, '100y100')"
-                      class="w-full h-full object-cover"
-                      @error="handleCoverError"
-                    />
                     <div
-                      class="absolute inset-0 flex items-center justify-center bg-black/40 opacity-0 group-hover:opacity-100 transition-all cursor-pointer"
-                      @click="handlePlayMusic(item)"
+                      class="relative w-12 h-12 rounded-xl overflow-hidden shadow-lg flex-shrink-0"
                     >
-                      <i class="ri-play-fill text-white text-xl" />
-                    </div>
-                  </div>
-
-                  <div class="flex-1 min-w-0">
-                    <div class="flex items-center gap-2">
-                      <span class="text-sm font-bold text-neutral-900 dark:text-white truncate">{{
-                        item.displayName || item.filename
-                      }}</span>
-                      <span class="text-xs text-neutral-400 flex-shrink-0">{{
-                        formatSize(item.size)
-                      }}</span>
-                    </div>
-                    <div class="flex items-center gap-4 mt-1">
-                      <span class="text-xs text-neutral-500 truncate max-w-[150px]">{{
-                        item.ar?.map((a) => a.name).join(', ')
-                      }}</span>
+                      <img
+                        :src="getImgUrl(item.picUrl, '100y100')"
+                        class="w-full h-full object-cover"
+                        @error="handleCoverError"
+                      />
                       <div
-                        class="hidden md:flex items-center gap-1 text-[10px] text-neutral-400 bg-neutral-100 dark:bg-neutral-800 px-2 py-0.5 rounded-full truncate"
+                        class="absolute inset-0 flex items-center justify-center bg-black/40 opacity-0 group-hover:opacity-100 transition-all cursor-pointer"
+                        @click="handlePlayMusic(item)"
                       >
-                        <i class="ri-folder-line" />
-                        <span class="truncate">{{ shortenPath(item.path || item.filePath) }}</span>
+                        <i class="ri-play-fill text-white text-xl" />
                       </div>
                     </div>
-                  </div>
 
-                  <div class="flex items-center gap-1">
-                    <n-tooltip trigger="hover">
-                      <template #trigger>
-                        <button
-                          class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-primary hover:bg-primary/10 transition-all"
-                          @click="copyPath(item.path || item.filePath)"
-                        >
-                          <i class="ri-file-copy-line" />
-                        </button>
-                      </template>
-                      {{ t('download.path.copy') || '复制路径' }}
-                    </n-tooltip>
-                    <n-tooltip trigger="hover">
-                      <template #trigger>
-                        <button
-                          class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-primary hover:bg-primary/10 transition-all"
-                          @click="openDirectory(item.path || item.filePath)"
-                        >
-                          <i class="ri-folder-open-line" />
-                        </button>
-                      </template>
-                      {{ t('download.settingsPanel.open') }}
-                    </n-tooltip>
-                    <n-tooltip trigger="hover">
-                      <template #trigger>
-                        <button
-                          class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-red-500 hover:bg-red-500/10 transition-all"
-                          @click="handleDelete(item)"
+                    <div class="flex-1 min-w-0">
+                      <div class="flex items-center gap-2">
+                        <span class="text-sm font-bold text-neutral-900 dark:text-white truncate">{{
+                          item.displayName || item.filename
+                        }}</span>
+                        <span class="text-xs text-neutral-400 flex-shrink-0">{{
+                          formatSize(item.size)
+                        }}</span>
+                      </div>
+                      <div class="flex items-center gap-4 mt-1">
+                        <span class="text-xs text-neutral-500 truncate max-w-[150px]">{{
+                          item.ar?.map((a) => a.name).join(', ')
+                        }}</span>
+                        <div
+                          class="hidden md:flex items-center gap-1 text-[10px] text-neutral-400 bg-neutral-100 dark:bg-neutral-800 px-2 py-0.5 rounded-full truncate"
                         >
-                          <i class="ri-delete-bin-line" />
-                        </button>
-                      </template>
-                      {{ t('common.delete') }}
-                    </n-tooltip>
+                          <i class="ri-folder-line" />
+                          <span class="truncate">{{
+                            shortenPath(item.path || item.filePath)
+                          }}</span>
+                        </div>
+                      </div>
+                    </div>
+
+                    <div class="flex items-center gap-1">
+                      <n-tooltip trigger="hover">
+                        <template #trigger>
+                          <button
+                            class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-primary hover:bg-primary/10 transition-all"
+                            @click="copyPath(item.path || item.filePath)"
+                          >
+                            <i class="ri-file-copy-line" />
+                          </button>
+                        </template>
+                        {{ t('download.path.copy') || '复制路径' }}
+                      </n-tooltip>
+                      <n-tooltip trigger="hover">
+                        <template #trigger>
+                          <button
+                            class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-primary hover:bg-primary/10 transition-all"
+                            @click="openDirectory(item.path || item.filePath)"
+                          >
+                            <i class="ri-folder-open-line" />
+                          </button>
+                        </template>
+                        {{ t('download.settingsPanel.open') }}
+                      </n-tooltip>
+                      <n-tooltip trigger="hover">
+                        <template #trigger>
+                          <button
+                            class="w-8 h-8 rounded-full flex items-center justify-center text-neutral-400 hover:text-red-500 hover:bg-red-500/10 transition-all"
+                            @click="handleDelete(item)"
+                          >
+                            <i class="ri-delete-bin-line" />
+                          </button>
+                        </template>
+                        {{ t('common.delete') }}
+                      </n-tooltip>
+                    </div>
                   </div>
                 </div>
+                <!-- 未渲染项占位 -->
+                <div
+                  v-if="downloadedPlaceholderHeight > 0"
+                  :style="{ height: downloadedPlaceholderHeight + 'px' }"
+                />
               </div>
             </n-spin>
           </div>
@@ -540,6 +550,7 @@ import { useMessage } from 'naive-ui';
 import { computed, onMounted, ref, watch } from 'vue';
 import { useI18n } from 'vue-i18n';
 
+import { useProgressiveRender } from '@/hooks/useProgressiveRender';
 import { useDownloadStore } from '@/store/modules/download';
 import { usePlayerStore } from '@/store/modules/player';
 import type { SongResult } from '@/types/music';
@@ -551,8 +562,23 @@ const { t } = useI18n();
 const playerStore = usePlayerStore();
 const downloadStore = useDownloadStore();
 const message = useMessage();
+const scrollbarRef = ref();
+
+const completedList = computed(() => downloadStore.completedList);
+
+const {
+  renderedItems: renderedDownloaded,
+  placeholderHeight: downloadedPlaceholderHeight,
+  contentPaddingBottom,
+  handleScroll: handleDownloadScroll
+} = useProgressiveRender({
+  items: completedList,
+  itemHeight: 72,
+  listSelector: '.downloaded-list-section',
+  initialCount: 40
+});
 
-const tabName = ref('downloading');
+const tabName = ref(downloadStore.downloadingList.length > 0 ? 'downloading' : 'downloaded');
 
 // ── Status helpers ──────────────────────────────────────────────────────────
 
diff --git a/src/renderer/views/favorite/index.vue b/src/renderer/views/favorite/index.vue
diff --git a/src/renderer/views/music/MusicListPage.vue b/src/renderer/views/music/MusicListPage.vue
