实现跨边界拖拽功能：支持从浏览器拖拽文件到系统

主要改进： - 使用 File System Access API 实现真正的跨应用边界文件传输 - 支持拖拽到窗口外自动触发系统保存对话框 - 智能路径记忆功能，记住用户上次选择的保存位置 - 多文件自动打包为 ZIP 格式 - 现代浏览器优先使用新 API，旧浏览器降级到传统下载 - 完整的视觉反馈和进度显示技术实现： - 新增 useDragToSystemDesktop hook 处理系统级拖拽 - 扩展 Electron 主进程支持拖拽临时文件管理 - 集成 JSZip 库支持多文件打包 - 使用 IndexedDB 存储用户偏好的保存路径 - 优化文件管理器拖拽事件处理链 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
2025-09-17 00:08:15 +08:00
parent 3f90faf1d0
commit d79d435594
11 changed files with 1206 additions and 10 deletions
--- a/src/ui/hooks/useDragToSystemDesktop.ts
+++ b/src/ui/hooks/useDragToSystemDesktop.ts
@@ -0,0 +1,309 @@
+import { useState, useCallback, useRef } from 'react';
+import { toast } from 'sonner';
+import { downloadSSHFile } from '@/ui/main-axios';
+import type { FileItem, SSHHost } from '../../types/index.js';
+
+interface DragToSystemState {
+  isDragging: boolean;
+  isDownloading: boolean;
+  progress: number;
+  error: string | null;
+}
+
+interface UseDragToSystemProps {
+  sshSessionId: string;
+  sshHost: SSHHost;
+}
+
+interface DragToSystemOptions {
+  enableToast?: boolean;
+  onSuccess?: () => void;
+  onError?: (error: string) => void;
+}
+
+export function useDragToSystemDesktop({ sshSessionId, sshHost }: UseDragToSystemProps) {
+  const [state, setState] = useState<DragToSystemState>({
+    isDragging: false,
+    isDownloading: false,
+    progress: 0,
+    error: null
+  });
+
+  const dragDataRef = useRef<{ files: FileItem[], options: DragToSystemOptions } | null>(null);
+
+  // 目录记忆功能
+  const getLastSaveDirectory = async () => {
+    try {
+      if ('indexedDB' in window) {
+        const request = indexedDB.open('termix-dirs', 1);
+        return new Promise((resolve) => {
+          request.onsuccess = () => {
+            const db = request.result;
+            const transaction = db.transaction(['directories'], 'readonly');
+            const store = transaction.objectStore('directories');
+            const getRequest = store.get('lastSaveDir');
+            getRequest.onsuccess = () => resolve(getRequest.result?.handle || null);
+          };
+          request.onerror = () => resolve(null);
+          request.onupgradeneeded = () => {
+            const db = request.result;
+            if (!db.objectStoreNames.contains('directories')) {
+              db.createObjectStore('directories');
+            }
+          };
+        });
+      }
+    } catch (error) {
+      console.log('无法获取上次保存目录:', error);
+    }
+    return null;
+  };
+
+  const saveLastDirectory = async (fileHandle: any) => {
+    try {
+      if ('indexedDB' in window && fileHandle.getParent) {
+        const dirHandle = await fileHandle.getParent();
+        const request = indexedDB.open('termix-dirs', 1);
+        request.onsuccess = () => {
+          const db = request.result;
+          const transaction = db.transaction(['directories'], 'readwrite');
+          const store = transaction.objectStore('directories');
+          store.put({ handle: dirHandle }, 'lastSaveDir');
+        };
+      }
+    } catch (error) {
+      console.log('无法保存目录记录:', error);
+    }
+  };
+
+  // 检查File System Access API支持
+  const isFileSystemAPISupported = () => {
+    return 'showSaveFilePicker' in window;
+  };
+
+  // 检查拖拽是否离开窗口边界
+  const isDraggedOutsideWindow = (e: DragEvent) => {
+    const margin = 50; // 增加容差边距
+    return (
+      e.clientX < margin ||
+      e.clientX > window.innerWidth - margin ||
+      e.clientY < margin ||
+      e.clientY > window.innerHeight - margin
+    );
+  };
+
+  // 创建文件blob
+  const createFileBlob = async (file: FileItem): Promise<Blob> => {
+    const response = await downloadSSHFile(sshSessionId, file.path);
+    if (!response?.content) {
+      throw new Error(`无法获取文件 ${file.name} 的内容`);
+    }
+
+    // base64转换为blob
+    const binaryString = atob(response.content);
+    const bytes = new Uint8Array(binaryString.length);
+    for (let i = 0; i < binaryString.length; i++) {
+      bytes[i] = binaryString.charCodeAt(i);
+    }
+
+    return new Blob([bytes]);
+  };
+
+  // 创建ZIP文件（用于多文件下载）
+  const createZipBlob = async (files: FileItem[]): Promise<Blob> => {
+    // 这里需要一个轻量级的zip库，先用简单方案
+    const JSZip = (await import('jszip')).default;
+    const zip = new JSZip();
+
+    for (const file of files) {
+      const blob = await createFileBlob(file);
+      zip.file(file.name, blob);
+    }
+
+    return await zip.generateAsync({ type: 'blob' });
+  };
+
+  // 使用File System Access API保存文件
+  const saveFileWithSystemAPI = async (blob: Blob, suggestedName: string) => {
+    try {
+      // 获取上次保存的目录句柄
+      const lastDirHandle = await getLastSaveDirectory();
+
+      const fileHandle = await (window as any).showSaveFilePicker({
+        suggestedName,
+        startIn: lastDirHandle || 'desktop', // 优先使用上次目录，否则桌面
+        types: [
+          {
+            description: '文件',
+            accept: {
+              '*/*': ['.txt', '.jpg', '.png', '.pdf', '.zip', '.tar', '.gz']
+            }
+          }
+        ]
+      });
+
+      // 保存当前目录句柄以便下次使用
+      await saveLastDirectory(fileHandle);
+
+      const writable = await fileHandle.createWritable();
+      await writable.write(blob);
+      await writable.close();
+
+      return true;
+    } catch (error: any) {
+      if (error.name === 'AbortError') {
+        return false; // 用户取消
+      }
+      throw error;
+    }
+  };
+
+  // 降级方案：传统下载
+  const fallbackDownload = (blob: Blob, fileName: string) => {
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = fileName;
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    URL.revokeObjectURL(url);
+  };
+
+  // 处理拖拽到系统桌面
+  const handleDragToSystem = useCallback(async (
+    files: FileItem[],
+    options: DragToSystemOptions = {}
+  ) => {
+    const { enableToast = true, onSuccess, onError } = options;
+
+    if (files.length === 0) {
+      const error = '没有可拖拽的文件';
+      if (enableToast) toast.error(error);
+      onError?.(error);
+      return false;
+    }
+
+    // 过滤出文件类型
+    const fileList = files.filter(f => f.type === 'file');
+    if (fileList.length === 0) {
+      const error = '只能拖拽文件到桌面';
+      if (enableToast) toast.error(error);
+      onError?.(error);
+      return false;
+    }
+
+    try {
+      setState(prev => ({ ...prev, isDownloading: true, progress: 0, error: null }));
+
+      let blob: Blob;
+      let fileName: string;
+
+      if (fileList.length === 1) {
+        // 单文件
+        blob = await createFileBlob(fileList[0]);
+        fileName = fileList[0].name;
+        setState(prev => ({ ...prev, progress: 70 }));
+      } else {
+        // 多文件打包成ZIP
+        blob = await createZipBlob(fileList);
+        fileName = `files_${Date.now()}.zip`;
+        setState(prev => ({ ...prev, progress: 70 }));
+      }
+
+      setState(prev => ({ ...prev, progress: 90 }));
+
+      // 优先使用File System Access API
+      if (isFileSystemAPISupported()) {
+        const saved = await saveFileWithSystemAPI(blob, fileName);
+        if (!saved) {
+          // 用户取消了
+          setState(prev => ({ ...prev, isDownloading: false, progress: 0 }));
+          return false;
+        }
+      } else {
+        // 降级到传统下载
+        fallbackDownload(blob, fileName);
+        if (enableToast) {
+          toast.info('由于浏览器限制，文件将下载到默认下载目录');
+        }
+      }
+
+      setState(prev => ({ ...prev, progress: 100 }));
+
+      if (enableToast) {
+        toast.success(
+          fileList.length === 1
+            ? `${fileName} 已保存到指定位置`
+            : `${fileList.length} 个文件已打包保存`
+        );
+      }
+
+      onSuccess?.();
+
+      // 重置状态
+      setTimeout(() => {
+        setState(prev => ({ ...prev, isDownloading: false, progress: 0 }));
+      }, 1000);
+
+      return true;
+    } catch (error: any) {
+      console.error('拖拽到桌面失败:', error);
+      const errorMessage = error.message || '保存失败';
+
+      setState(prev => ({
+        ...prev,
+        isDownloading: false,
+        progress: 0,
+        error: errorMessage
+      }));
+
+      if (enableToast) {
+        toast.error(`保存失败: ${errorMessage}`);
+      }
+
+      onError?.(errorMessage);
+      return false;
+    }
+  }, [sshSessionId]);
+
+  // 开始拖拽（记录拖拽数据）
+  const startDragToSystem = useCallback((files: FileItem[], options: DragToSystemOptions = {}) => {
+    dragDataRef.current = { files, options };
+    setState(prev => ({ ...prev, isDragging: true, error: null }));
+  }, []);
+
+  // 结束拖拽检测
+  const handleDragEnd = useCallback((e: DragEvent) => {
+    if (!dragDataRef.current) return;
+
+    const { files, options } = dragDataRef.current;
+
+    // 检查是否拖拽到窗口外
+    if (isDraggedOutsideWindow(e)) {
+      // 延迟执行，避免与其他拖拽事件冲突
+      setTimeout(() => {
+        handleDragToSystem(files, options);
+      }, 100);
+    }
+
+    // 清理拖拽状态
+    dragDataRef.current = null;
+    setState(prev => ({ ...prev, isDragging: false }));
+  }, [handleDragToSystem]);
+
+  // 取消拖拽
+  const cancelDragToSystem = useCallback(() => {
+    dragDataRef.current = null;
+    setState(prev => ({ ...prev, isDragging: false, error: null }));
+  }, []);
+
+  return {
+    ...state,
+    isFileSystemAPISupported: isFileSystemAPISupported(),
+    startDragToSystem,
+    handleDragEnd,
+    cancelDragToSystem,
+    handleDragToSystem // 直接调用版本
+  };
+}