1 files changed, 61 insertions(+), 6 deletions(-)

M explorer/explorer_windows.go

@@ 22,10 22,12 @@ var (
 	_GetOpenFileName = _Dialog32.NewProc("GetOpenFileNameW")
 
 	// https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-openfilenamew
-	_FlagFileMustExist   = uint32(0x00001000)
-	_FlagForceShowHidden = uint32(0x10000000)
-	_FlagOverwritePrompt = uint32(0x00000002)
-	_FlagDisableLinks    = uint32(0x00100000)
+	_FlagFileMustExist    = uint32(0x00001000)
+	_FlagForceShowHidden  = uint32(0x10000000)
+	_FlagOverwritePrompt  = uint32(0x00000002)
+	_FlagDisableLinks     = uint32(0x00100000)
+	_FlagAllowMultiSelect = uint32(0x00000200)
+	_FlagExplorer         = uint32(0x00080000)
 
 	_FilePathLength       = uint32(65535)
 	_OpenFileStructLength = uint32(unsafe.Sizeof(_OpenFileName{}))


@@ 118,8 120,61 @@ func (e *Explorer) importFile(extensions ...string) (io.ReadCloser, error) {
 	return os.Open(path)
 }
 
-func (e *Explorer) importFiles(_ ...string) ([]io.ReadCloser, error) {
-	return nil, ErrNotAvailable
+func (e *Explorer) importFiles(extensions ...string) ([]io.ReadCloser, error) {
+	pathUTF16 := make([]uint16, _FilePathLength)
+
+	open := _OpenFileName{
+		File:       &pathUTF16[0],
+		MaxFile:    _FilePathLength,
+		Filter:     buildFilter(extensions),
+		Flags:      _FlagFileMustExist | _FlagForceShowHidden | _FlagDisableLinks | _FlagAllowMultiSelect | _FlagExplorer,
+		StructSize: _OpenFileStructLength,
+	}
+
+	if r, _, _ := _GetOpenFileName.Call(uintptr(unsafe.Pointer(&open))); r == 0 {
+		return nil, ErrUserDecline
+	}
+
+	// Split the pathUTF16 by null characters
+	paths := make([]string, 0)
+	currentPath := make([]uint16, 0)
+	for _, char := range pathUTF16 {
+		if char == 0 {
+			if len(currentPath) > 0 {
+				paths = append(paths, windows.UTF16ToString(currentPath))
+				currentPath = currentPath[:0]
+			}
+		} else {
+			currentPath = append(currentPath, char)
+		}
+	}
+
+	// The first element is the directory, append it to each filename
+	dir := paths[0]
+	filePaths := make([]string, len(paths)-1)
+	for i, file := range paths[1:] {
+		filePaths[i] = filepath.Join(dir, file)
+	}
+
+	if len(filePaths) == 0 {
+		return nil, ErrUserDecline
+	}
+
+	files := make([]io.ReadCloser, len(filePaths))
+	for i, filePath := range filePaths {
+		file, err := os.Open(filePath)
+		if err != nil {
+			for _, file := range files {
+				if file != nil {
+					file.Close()
+				}
+			}
+			return nil, err
+		}
+		files[i] = file
+	}
+
+	return files, nil
 }
 
 func buildFilter(extensions []string) *uint16 {