refactor(ImageViewer): optimize image loading and zoom functionality

View/src/components/image/ImageViewer.css

@@ -83,30 +83,33 @@
   right: 0;
   bottom: 0;
   z-index: 1003;
+  overflow: hidden;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  touch-action: none;
+}
+
+.image-transform-wrapper {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  justify-content: center;
+  align-items: center;
   overflow: visible;
-  display: flex;
-  align-items: center;
-  justify-content: center;
-}
-
-.transform-wrapper {
-  width: 100%;
-  height: 100%;
   position: relative;
 }
 
-.transform-content {
-  display: flex;
-  justify-content: center;
-  align-items: center;
-  width: 100%;
-  height: 100%;
-}
-
 .viewer-img {
   max-width: 100%;
   max-height: 100%;
-  transition: opacity 0.3s ease, transform 0.3s ease;
+  user-select: none;
+  -webkit-user-drag: none;
+  will-change: transform;
+}
+
+.viewer-img.dragging {
+  cursor: grabbing !important;
 }
 
 .zoom-controls {
@@ -338,7 +341,6 @@
   padding: 12px 16px;
 }
 
-/* 图片加载动画样式 */
 .image-loading-spinner {
   position: absolute;
   top: 50%;
@@ -357,7 +359,6 @@
   margin-top: 12px;
 }
 
-/* Spin组件自定义样式 */
 .image-loading-spinner .ant-spin {
   color: white;
 }

View/src/components/image/ImageViewer.tsx

@@ -6,7 +6,6 @@ import {
   RotateRightOutlined, HeartOutlined, HeartFilled, DownloadOutlined,
   ShareAltOutlined, FolderAddOutlined
 } from '@ant-design/icons';
-import { TransformWrapper, TransformComponent } from 'react-zoom-pan-pinch';
 import type { PictureResponse, AlbumResponse } from '../../api/types';
 import { getAlbums, addPicturesToAlbum, favoritePicture, unfavoritePicture } from '../../api';
 import ImageInfo from './ImageInfo';
@@ -25,7 +24,6 @@ interface ImageViewerProps {
   onShare?: (image: PictureResponse) => void;
 }
 
-// 添加图片缓存对象
 interface ImageCache {
   [key: string]: {
     loaded: boolean;
@@ -33,6 +31,17 @@ interface ImageCache {
   }
 }
 
+interface ZoomPanState {
+  scale: number;
+  positionX: number;
+  positionY: number;
+  isDragging: boolean;
+  dragStartX: number;
+  dragStartY: number;
+  lastPositionX: number;
+  lastPositionY: number;
+}
+
 const ImageViewer: React.FC<ImageViewerProps> = ({
   visible,
   onClose,
@@ -53,62 +62,125 @@ const ImageViewer: React.FC<ImageViewerProps> = ({
   const [localImages, setLocalImages] = useState<PictureResponse[]>(images);
   const [shareDialogVisible, setShareDialogVisible] = useState(false);
   const [imageLoaded, setImageLoaded] = useState(false);
+  const [currentLoading, setCurrentLoading] = useState(false);
   
-  // 修改：使用 useRef 存储图片缓存，避免重复加载
+  const [zoomPanState, setZoomPanState] = useState<ZoomPanState>({
+    scale: 1,
+    positionX: 0,
+    positionY: 0,
+    isDragging: false,
+    dragStartX: 0,
+    dragStartY: 0,
+    lastPositionX: 0,
+    lastPositionY: 0,
+  });
+  
+  const imageContainerRef = useRef<HTMLDivElement>(null);
+  const imageRef = useRef<HTMLImageElement>(null);
   const imageCache = useRef<ImageCache>({});
-  
-  // 替换原来的 cacheKey
   const sessionKey = useRef<string>(Date.now().toString());
   
   const currentImage = localImages[currentIndex];
-
-  // 预加载图片的范围
-  const preloadRange = 2; // 当前图片前后各预加载2张
+  const preloadRange = 2;
+  
+  const MIN_SCALE = 0.1;
+  const MAX_SCALE = 8;
+  const ZOOM_FACTOR = 0.2;
 
   const resetViewerState = useCallback(() => {
     setRotation(0);
     setIsInfoDrawerOpen(false);
     setImageLoaded(false);
+    setZoomPanState({
+      scale: 1,
+      positionX: 0,
+      positionY: 0,
+      isDragging: false,
+      dragStartX: 0,
+      dragStartY: 0,
+      lastPositionX: 0,
+      lastPositionY: 0,
+    });
   }, []);
 
-  // 优化图片加载函数
+  // 当前加载中的图片URL追踪
+  const currentLoadingUrl = useRef<string | null>(null);
+  
+  // 预渲染图片容器
+  const preloadedImagesRef = useRef<{[key: string]: HTMLImageElement}>({});
+  
+  // 图片过渡状态
+  const [fadeTransition, setFadeTransition] = useState(false);
+  const [, setActiveImage] = useState<string | null>(null);
+
   const loadImage = useCallback((imageUrl: string): Promise<HTMLImageElement> => {
     return new Promise((resolve, reject) => {
-      // 检查是否已经缓存
+      // 检查缓存
       if (imageCache.current[imageUrl]?.loaded) {
-        setImageLoaded(true);
+        if (currentImage && imageUrl === currentImage.path) {
+          setImageLoaded(true);
+          setActiveImage(imageUrl);
+        }
         return resolve(imageCache.current[imageUrl].img);
       }
 
       const img = new Image();
       img.onload = () => {
-        // 更新缓存
         imageCache.current[imageUrl] = {
           loaded: true,
           img
         };
+        
+        preloadedImagesRef.current[imageUrl] = img;
+        
+        if (imageUrl === currentLoadingUrl.current) {
+          setImageLoaded(true);
+          setCurrentLoading(false);
+          setActiveImage(imageUrl);
+        }
+        
         resolve(img);
       };
       img.onerror = () => {
+        if (imageUrl === currentLoadingUrl.current) {
+          setCurrentLoading(false);
+        }
         reject(new Error(`Failed to load image: ${imageUrl}`));
       };
       
-      // 使用相对持久的缓存键，而不是每次都更新
       img.src = `${imageUrl}${imageUrl.includes('?') ? '&' : '?'}_s=${sessionKey.current}`;
     });
-  }, []);
+  }, [currentImage]);
 
-  // 修改：当图片索引变化时只设置加载状态，不重置缓存键
+  // 图片切换逻辑优化
   useEffect(() => {
     setImageLoaded(false);
+    setCurrentLoading(true);
+    setFadeTransition(true);
+    
+    // 利用缓存快速显示
+    if (currentImage && imageCache.current[currentImage.path]?.loaded) {
+      setActiveImage(currentImage.path);
+      setImageLoaded(true);
+      setCurrentLoading(false);
+      
+      setTimeout(() => setFadeTransition(false), 100);
+    }
+    
+    // 重置缩放状态
+    setZoomPanState(prev => ({
+      ...prev,
+      scale: 1,
+      positionX: 0,
+      positionY: 0,
+      isDragging: false
+    }));
   }, [currentIndex]);
 
-  // 修改：查看器可见性改变时的处理逻辑
+  // 可见性变化处理
   useEffect(() => {
     if (visible && !wasVisible.current) {
       resetViewerState();
-      
-      // 生成会话唯一的缓存键，而不是每次都更新
       if (!sessionKey.current) {
         sessionKey.current = Date.now().toString();
       }
@@ -116,37 +188,45 @@ const ImageViewer: React.FC<ImageViewerProps> = ({
     wasVisible.current = visible;
   }, [visible, resetViewerState]);
   
+  // 初始索引处理
   useEffect(() => {
     if (visible && initialIndex >= 0 && initialIndex < images.length) {
       setCurrentIndex(initialIndex);
     }
   }, [visible, initialIndex, images.length]);
 
-  // 修改：加载当前图片并预加载相邻图片
+  // 图片加载逻辑
   useEffect(() => {
     if (!currentImage || !visible) return;
 
-    // 加载当前图片
-    const imagePath = currentImage.path;
-    loadImage(imagePath)
-      .then(() => setImageLoaded(true))
+    currentLoadingUrl.current = currentImage.path;
+    setCurrentLoading(true);
+    
+    loadImage(currentImage.path)
+      .then(() => {
+        if (currentLoadingUrl.current === currentImage.path) {
+          setImageLoaded(true);
+          setCurrentLoading(false);
+          setActiveImage(currentImage.path);
+          
+          setTimeout(() => setFadeTransition(false), 100);
+        }
+      })
       .catch(error => {
         console.error('Failed to load image:', error);
         message.error('图片加载失败，请重试');
+        setCurrentLoading(false);
       });
     
     // 预加载相邻图片
     if (localImages.length > 1) {
-      // 使用 setTimeout 延迟预加载，优先加载当前图片
       setTimeout(() => {
         for (let i = 1; i <= preloadRange; i++) {
-          // 预加载后面的图片
           const nextIndex = currentIndex + i;
           if (nextIndex < localImages.length) {
             loadImage(localImages[nextIndex].path).catch(() => {});
           }
           
-          // 预加载前面的图片
           const prevIndex = currentIndex - i;
           if (prevIndex >= 0) {
             loadImage(localImages[prevIndex].path).catch(() => {});
@@ -269,11 +349,146 @@ const ImageViewer: React.FC<ImageViewerProps> = ({
     onShare ? onShare(currentImage) : setShareDialogVisible(true);
   }, [currentImage, onShare]);
 
+  const zoomIn = useCallback((factor = ZOOM_FACTOR) => {
+    setZoomPanState(prev => ({
+      ...prev,
+      scale: Math.min(MAX_SCALE, prev.scale * (1 + factor))
+    }));
+  }, []);
+
+  const zoomOut = useCallback((factor = ZOOM_FACTOR) => {
+    setZoomPanState(prev => ({
+      ...prev,
+      scale: Math.max(MIN_SCALE, prev.scale / (1 + factor))
+    }));
+  }, []);
+
+  const resetTransform = useCallback(() => {
+    setZoomPanState({
+      scale: 1,
+      positionX: 0,
+      positionY: 0,
+      isDragging: false,
+      dragStartX: 0,
+      dragStartY: 0,
+      lastPositionX: 0,
+      lastPositionY: 0,
+    });
+  }, []);
+
+  const handleWheel = useCallback((e: React.WheelEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    const delta = e.deltaY || e.deltaX;
+    const scaleFactor = delta > 0 ? 0.9 : 1.1;
+
+    setZoomPanState(prev => {
+      const newScale = Math.max(MIN_SCALE, Math.min(MAX_SCALE, prev.scale * scaleFactor));
+      
+      const rect = imageContainerRef.current?.getBoundingClientRect();
+      if (!rect) return { ...prev, scale: newScale };
+      
+      const mouseX = e.clientX - rect.left;
+      const mouseY = e.clientY - rect.top;
+      const containerCenterX = rect.width / 2;
+      const containerCenterY = rect.height / 2;
+      const dx = (mouseX - containerCenterX - prev.positionX) * (scaleFactor - 1);
+      const dy = (mouseY - containerCenterY - prev.positionY) * (scaleFactor - 1);
+      
+      return {
+        ...prev,
+        scale: newScale,
+        positionX: prev.positionX - dx,
+        positionY: prev.positionY - dy,
+      };
+    });
+  }, []);
+
+  const handleMouseDown = useCallback((e: React.MouseEvent<HTMLDivElement>) => {
+    e.preventDefault();
+    setZoomPanState(prev => ({
+      ...prev,
+      isDragging: true,
+      dragStartX: e.clientX,
+      dragStartY: e.clientY,
+      lastPositionX: prev.positionX,
+      lastPositionY: prev.positionY
+    }));
+  }, []);
+
+  const handleTouchStart = useCallback((e: React.TouchEvent<HTMLDivElement>) => {
+    if (e.touches.length === 1) {
+      const touch = e.touches[0];
+      setZoomPanState(prev => ({
+        ...prev,
+        isDragging: true,
+        dragStartX: touch.clientX,
+        dragStartY: touch.clientY,
+        lastPositionX: prev.positionX,
+        lastPositionY: prev.positionY
+      }));
+    }
+  }, []);
+
+  const handleMouseMove = useCallback((e: React.MouseEvent<HTMLDivElement>) => {
+    if (zoomPanState.isDragging) {
+      const dx = e.clientX - zoomPanState.dragStartX;
+      const dy = e.clientY - zoomPanState.dragStartY;
+      
+      setZoomPanState(prev => ({
+        ...prev,
+        positionX: prev.lastPositionX + dx,
+        positionY: prev.lastPositionY + dy
+      }));
+    }
+  }, [zoomPanState.isDragging, zoomPanState.dragStartX, zoomPanState.dragStartY, zoomPanState.lastPositionX, zoomPanState.lastPositionY]);
+
+  const handleTouchMove = useCallback((e: React.TouchEvent<HTMLDivElement>) => {
+    if (zoomPanState.isDragging && e.touches.length === 1) {
+      const touch = e.touches[0];
+      const dx = touch.clientX - zoomPanState.dragStartX;
+      const dy = touch.clientY - zoomPanState.dragStartY;
+      
+      setZoomPanState(prev => ({
+        ...prev,
+        positionX: prev.lastPositionX + dx,
+        positionY: prev.lastPositionY + dy
+      }));
+    }
+  }, [zoomPanState.isDragging, zoomPanState.dragStartX, zoomPanState.dragStartY, zoomPanState.lastPositionX, zoomPanState.lastPositionY]);
+
+  const handleMouseUp = useCallback(() => {
+    setZoomPanState(prev => ({ ...prev, isDragging: false }));
+  }, []);
+
+  const handleTouchEnd = useCallback(() => {
+    setZoomPanState(prev => ({ ...prev, isDragging: false }));
+  }, []);
+
+  const handleDoubleClick = useCallback(() => {
+    resetTransform();
+  }, [resetTransform]);
+
+  useEffect(() => {
+    if (visible) {
+      window.addEventListener('mouseup', handleMouseUp);
+      window.addEventListener('mouseleave', handleMouseUp);
+      window.addEventListener('touchend', handleTouchEnd);
+      window.addEventListener('touchcancel', handleTouchEnd);
+      
+      return () => {
+        window.removeEventListener('mouseup', handleMouseUp);
+        window.removeEventListener('mouseleave', handleMouseUp);
+        window.removeEventListener('touchend', handleTouchEnd);
+        window.removeEventListener('touchcancel', handleTouchEnd);
+      };
+    }
+  }, [visible, handleMouseUp, handleTouchEnd]);
+
+  // 渲染优化：减少重绘和提高性能
   if (images.length === 0 || !currentImage) {
     return null;
   }
 
-  // 修改：更新图片URL，使用会话缓存键
   const getImageUrl = (path: string) => {
     return `${path}${path.includes('?') ? '&' : '?'}_s=${sessionKey.current}`;
   };
@@ -286,140 +501,134 @@ const ImageViewer: React.FC<ImageViewerProps> = ({
       <div className="viewer-overlay" onClick={onClose}></div>
 
       <div className="viewer-content">
-        <div className="image-container">
-          <TransformWrapper
-            initialScale={1}
-            initialPositionX={0}
-            initialPositionY={0}
-            centerOnInit={true}
-            minScale={0.1}
-            maxScale={8}
-            wheel={{ step: 0.2 }}
-            doubleClick={{ mode: 'reset' }}
-            panning={{ disabled: false }}
-            alignmentAnimation={{ disabled: true }}
-            velocityAnimation={{ disabled: false }}
-          >
-            {({ zoomIn, zoomOut, resetTransform }) => (
-              <>
-                <TransformComponent
-                  wrapperClass="transform-wrapper"
-                  contentClass="transform-content"
-                >
-                  {currentImage && (
-                    <img
-                      src={getImageUrl(currentImage.path)}
-                      alt={currentImage.name}
-                      style={{
-                        transform: `rotate(${rotation}deg)`,
-                        opacity: imageLoaded ? 1 : 0.3,
-                        transition: 'opacity 0.3s ease'
-                      }}
-                      className="viewer-img"
-                      loading="lazy"
-                    />
-                  )}
-                </TransformComponent>
-
-                {!imageLoaded && (
-                  <div className="image-loading-spinner">
-                    <Spin size="large" tip={<span className="loading-text">图片加载中...</span>} />
-                  </div>
-                )}
-
-                <div className="zoom-controls">
-                  <Space>
-                    <Button icon={<ExpandOutlined />} onClick={(_e) => resetTransform()} />
-                    <Button icon={<ZoomOutOutlined />} onClick={() => zoomOut(0.5)} />
-                    <Button icon={<ZoomInOutlined />} onClick={() => zoomIn(0.5)} />
-                    <Button icon={<RotateLeftOutlined />} onClick={() => setRotation(prev => prev - 90)} />
-                    <Button icon={<RotateRightOutlined />} onClick={() => setRotation(prev => prev + 90)} />
-                  </Space>
-                </div>
-              </>
-            )}
-          </TransformWrapper>
-
-          {currentIndex > 0 && (
-            <Button
-              className="nav-button prev-button"
-              icon={<LeftOutlined />}
-              onClick={handlePrevious}
-              shape="circle"
-              size="large"
-            />
-          )}
-
-          {currentIndex < images.length - 1 && (
-            <Button
-              className="nav-button next-button"
-              icon={<RightOutlined />}
-              onClick={handleNext}
-              shape="circle"
-              size="large"
-            />
-          )}
-        </div>
-
-        <div className="viewer-header">
-          <div className="image-counter">
-            {currentIndex + 1} / {images.length}
-          </div>
-          <div className="header-actions">
-            <Button
-              type="text"
-              icon={isInfoDrawerOpen ? <InfoCircleOutlined style={{ color: '#1890ff' }} /> : <InfoCircleOutlined />}
-              onClick={() => setIsInfoDrawerOpen(prev => !prev)}
-              className="header-btn"
-            />
-            <Button
-              type="text"
-              icon={<CloseOutlined />}
-              onClick={onClose}
-              className="header-btn"
-            />
-          </div>
-        </div>
-
-        <div className="viewer-footer">
-          <div className="image-name">{currentImage.name}</div>
-
-          <div className="footer-actions">
-            {onFavorite && (
-              <Button
-                type="text"
-                icon={currentImage.isFavorited ?
-                  <HeartFilled style={{ color: '#ff4d4f' }} /> :
-                  <HeartOutlined style={{ color: '#fff' }} />
-                }
-                onClick={handleFavoriteClick}
-                className="footer-btn"
-              >
-                {showFavoriteCount && typeof currentImage.favoriteCount === 'number' && (
-                  <span>{currentImage.favoriteCount}</span>
-                )}
-              </Button>
-            )}
-            <Dropdown menu={{ items: albumItems }} disabled={loadingAlbums || albums.length === 0}>
-              <Button
-                type="text"
-                icon={<FolderAddOutlined style={{ color: '#fff' }} />}
-                className="footer-btn"
+        <div 
+          className="image-container" 
+          ref={imageContainerRef}
+          onWheel={handleWheel}
+          onMouseDown={handleMouseDown}
+          onMouseMove={handleMouseMove}
+          onTouchStart={handleTouchStart}
+          onTouchMove={handleTouchMove}
+          onDoubleClick={handleDoubleClick}
+        >
+          <div className="image-transform-wrapper">
+            {currentImage && (
+              <img
+                ref={imageRef}
+                src={getImageUrl(currentImage.path)}
+                alt={currentImage.name}
+                style={{
+                  transform: `translate(${zoomPanState.positionX}px, ${zoomPanState.positionY}px) rotate(${rotation}deg) scale(${zoomPanState.scale})`,
+                  opacity: imageLoaded ? 1 : 0.3,
+                  transition: zoomPanState.isDragging ? 'none' : 
+                             fadeTransition ? 'opacity 0.15s ease, transform 0.1s ease-out' :
+                             'transform 0.1s ease-out',
+                  cursor: zoomPanState.scale > 1 ? 'grab' : 'auto',
+                  transformOrigin: 'center center',
+                  willChange: 'opacity, transform'
+                }}
+                className="viewer-img"
+                loading="eager"
               />
-            </Dropdown>
-            <Button
-              type="text"
-              icon={<DownloadOutlined style={{ color: '#fff' }} />}
-              onClick={() => window.open(currentImage.path, '_blank')}
-              className="footer-btn"
-            />
-            <Button
-              type="text"
-              icon={<ShareAltOutlined style={{ color: '#fff' }} />}
-              onClick={handleShareClick}
-              className="footer-btn"
-            />
+            )}
           </div>
+
+          {(!imageLoaded || currentLoading) && (
+            <div className="image-loading-spinner">
+              <Spin size="large" tip={<span className="loading-text">图片加载中...</span>} />
+            </div>
+          )}
+
+          <div className="zoom-controls">
+            <Space>
+              <Button icon={<ExpandOutlined />} onClick={resetTransform} />
+              <Button icon={<ZoomOutOutlined />} onClick={() => zoomOut()} />
+              <Button icon={<ZoomInOutlined />} onClick={() => zoomIn()} />
+              <Button icon={<RotateLeftOutlined />} onClick={() => setRotation(prev => prev - 90)} />
+              <Button icon={<RotateRightOutlined />} onClick={() => setRotation(prev => prev + 90)} />
+            </Space>
+          </div>
+        </div>
+
+        {currentIndex > 0 && (
+          <Button
+            className="nav-button prev-button"
+            icon={<LeftOutlined />}
+            onClick={handlePrevious}
+            shape="circle"
+            size="large"
+          />
+        )}
+
+        {currentIndex < images.length - 1 && (
+          <Button
+            className="nav-button next-button"
+            icon={<RightOutlined />}
+            onClick={handleNext}
+            shape="circle"
+            size="large"
+          />
+        )}
+      </div>
+
+      <div className="viewer-header">
+        <div className="image-counter">
+          {currentIndex + 1} / {images.length}
+        </div>
+        <div className="header-actions">
+          <Button
+            type="text"
+            icon={isInfoDrawerOpen ? <InfoCircleOutlined style={{ color: '#1890ff' }} /> : <InfoCircleOutlined />}
+            onClick={() => setIsInfoDrawerOpen(prev => !prev)}
+            className="header-btn"
+          />
+          <Button
+            type="text"
+            icon={<CloseOutlined />}
+            onClick={onClose}
+            className="header-btn"
+          />
+        </div>
+      </div>
+
+      <div className="viewer-footer">
+        <div className="image-name">{currentImage.name}</div>
+
+        <div className="footer-actions">
+          {onFavorite && (
+            <Button
+              type="text"
+              icon={currentImage.isFavorited ?
+                <HeartFilled style={{ color: '#ff4d4f' }} /> :
+                <HeartOutlined style={{ color: '#fff' }} />
+              }
+              onClick={handleFavoriteClick}
+              className="footer-btn"
+            >
+              {showFavoriteCount && typeof currentImage.favoriteCount === 'number' && (
+                <span>{currentImage.favoriteCount}</span>
+              )}
+            </Button>
+          )}
+          <Dropdown menu={{ items: albumItems }} disabled={loadingAlbums || albums.length === 0}>
+            <Button
+              type="text"
+              icon={<FolderAddOutlined style={{ color: '#fff' }} />}
+              className="footer-btn"
+            />
+          </Dropdown>
+          <Button
+            type="text"
+            icon={<DownloadOutlined style={{ color: '#fff' }} />}
+            onClick={() => window.open(currentImage.path, '_blank')}
+            className="footer-btn"
+          />
+          <Button
+            type="text"
+            icon={<ShareAltOutlined style={{ color: '#fff' }} />}
+            onClick={handleShareClick}
+            className="footer-btn"
+          />
         </div>
       </div>