lxy
b9c0786c02
- 后端 ReadClipboardFiles 读系统剪贴板 CF_HDROP 拿路径列表 - Ctrl+V 优先粘贴系统剪贴板文件，复用拖入导入链路（SFTP 上传/本机复制/目录递归） - 补齐设计文档记录的历史缺口（Wails 限制未做）
72 lines
2.0 KiB
Go
72 lines
2.0 KiB
Go
//go:build windows
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package main
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import (
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"runtime"
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"syscall"
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"time"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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var (
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procIsClipboardFormatAvailable = windows.NewLazySystemDLL("user32.dll").NewProc("IsClipboardFormatAvailable")
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procOpenClipboard = windows.NewLazySystemDLL("user32.dll").NewProc("OpenClipboard")
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procCloseClipboard = windows.NewLazySystemDLL("user32.dll").NewProc("CloseClipboard")
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procGetClipboardData = windows.NewLazySystemDLL("user32.dll").NewProc("GetClipboardData")
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procDragQueryFileW = windows.NewLazySystemDLL("shell32.dll").NewProc("DragQueryFileW")
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)
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// cfHDrop 剪贴板文件列表格式（资源管理器复制文件/文件夹），Win32 稳定 ABI 值
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const cfHDrop = 15
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// ReadClipboardFiles 读取系统剪贴板中的文件/文件夹路径列表。
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// 剪贴板为文本/截图等非文件内容时返回空列表，前端据此回落图片粘贴等原有链路。
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func (a *App) ReadClipboardFiles() ([]string, error) {
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// OpenClipboard 与 CloseClipboard 必须同线程，否则剪贴板死锁
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runtime.LockOSThread()
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defer runtime.UnlockOSThread()
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if r, _, _ := procIsClipboardFormatAvailable.Call(cfHDrop); r == 0 {
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return nil, nil
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}
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// 剪贴板是全局互斥资源，短重试避开其他进程的瞬时占用
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opened := false
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for i := 0; i < 20; i++ {
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if r, _, _ := procOpenClipboard.Call(0); r != 0 {
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opened = true
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break
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}
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time.Sleep(10 * time.Millisecond)
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}
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if !opened {
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return nil, syscall.EBUSY
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}
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defer procCloseClipboard.Call()
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h, _, _ := procGetClipboardData.Call(cfHDrop)
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if h == 0 {
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return nil, nil
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}
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count, _, _ := procDragQueryFileW.Call(h, 0xFFFFFFFF, 0, 0)
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if count == 0 {
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return nil, nil
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}
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paths := make([]string, 0, count)
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for i := uintptr(0); i < count; i++ {
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n, _, _ := procDragQueryFileW.Call(h, i, 0, 0)
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if n == 0 {
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continue
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}
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buf := make([]uint16, n+1)
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procDragQueryFileW.Call(h, i, uintptr(unsafe.Pointer(&buf[0])), n+1)
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paths = append(paths, syscall.UTF16ToString(buf))
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}
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return paths, nil
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}
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