diff options
Diffstat (limited to 'vendor/0xacab.org/leap/go-dialog/dlgs_windows.go')
-rw-r--r-- | vendor/0xacab.org/leap/go-dialog/dlgs_windows.go | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/vendor/0xacab.org/leap/go-dialog/dlgs_windows.go b/vendor/0xacab.org/leap/go-dialog/dlgs_windows.go new file mode 100644 index 0000000..aca8e2c --- /dev/null +++ b/vendor/0xacab.org/leap/go-dialog/dlgs_windows.go @@ -0,0 +1,141 @@ +package dialog + +import ( + "fmt" + "reflect" + "syscall" + "unicode/utf16" + "unsafe" + + "github.com/AllenDang/w32" +) + +type WinDlgError int + +func (e WinDlgError) Error() string { + return fmt.Sprintf("CommDlgExtendedError: %#x", e) +} + +func err() error { + e := w32.CommDlgExtendedError() + if e == 0 { + return Cancelled + } + return WinDlgError(e) +} + +func (b *MsgBuilder) yesNo() bool { + r := w32.MessageBox(w32.HWND(0), b.Msg, firstOf(b.Dlg.Title, "Confirm?"), w32.MB_YESNO) + return r == w32.IDYES +} + +func (b *MsgBuilder) info() { + w32.MessageBox(w32.HWND(0), b.Msg, firstOf(b.Dlg.Title, "Information"), w32.MB_OK|w32.MB_ICONINFORMATION) +} + +func (b *MsgBuilder) error() { + w32.MessageBox(w32.HWND(0), b.Msg, firstOf(b.Dlg.Title, "Error"), w32.MB_OK|w32.MB_ICONERROR) +} + +type filedlg struct { + buf []uint16 + filters []uint16 + opf *w32.OPENFILENAME +} + +func (d filedlg) Filename() string { + i := 0 + for i < len(d.buf) && d.buf[i] != 0 { + i++ + } + return string(utf16.Decode(d.buf[:i])) +} + +func (b *FileBuilder) load() (string, error) { + d := openfile(w32.OFN_FILEMUSTEXIST, b) + if w32.GetOpenFileName(d.opf) { + return d.Filename(), nil + } + return "", err() +} + +func (b *FileBuilder) save() (string, error) { + d := openfile(w32.OFN_OVERWRITEPROMPT, b) + if w32.GetSaveFileName(d.opf) { + return d.Filename(), nil + } + return "", err() +} + +/* syscall.UTF16PtrFromString not sufficient because we need to encode embedded NUL bytes */ +func utf16ptr(utf16 []uint16) *uint16 { + if utf16[len(utf16)-1] != 0 { + panic("refusing to make ptr to non-NUL terminated utf16 slice") + } + h := (*reflect.SliceHeader)(unsafe.Pointer(&utf16)) + return (*uint16)(unsafe.Pointer(h.Data)) +} + +func utf16slice(ptr *uint16) []uint16 { + hdr := reflect.SliceHeader{Data: uintptr(unsafe.Pointer(ptr)), Len: 1, Cap: 1} + slice := *((*[]uint16)(unsafe.Pointer(&hdr))) + i := 0 + for slice[len(slice)-1] != 0 { + i++ + } + hdr.Len = i + slice = *((*[]uint16)(unsafe.Pointer(&hdr))) + return slice +} + +func openfile(flags uint32, b *FileBuilder) (d filedlg) { + d.buf = make([]uint16, w32.MAX_PATH) + d.opf = &w32.OPENFILENAME{ + File: utf16ptr(d.buf), + MaxFile: uint32(len(d.buf)), + Flags: flags, + } + d.opf.StructSize = uint32(unsafe.Sizeof(*d.opf)) + if b.StartDir != "" { + d.opf.InitialDir, _ = syscall.UTF16PtrFromString(b.StartDir) + } + if b.Dlg.Title != "" { + d.opf.Title, _ = syscall.UTF16PtrFromString(b.Dlg.Title) + } + for _, filt := range b.Filters { + /* build utf16 string of form "Music File\0*.mp3;*.ogg;*.wav;\0" */ + d.filters = append(d.filters, utf16.Encode([]rune(filt.Desc))...) + d.filters = append(d.filters, 0) + for _, ext := range filt.Extensions { + s := fmt.Sprintf("*.%s;", ext) + d.filters = append(d.filters, utf16.Encode([]rune(s))...) + } + d.filters = append(d.filters, 0) + } + if d.filters != nil { + d.filters = append(d.filters, 0, 0) // two extra NUL chars to terminate the list + d.opf.Filter = utf16ptr(d.filters) + } + return d +} + +type dirdlg struct { + bi *w32.BROWSEINFO +} + +func selectdir(b *DirectoryBuilder) (d dirdlg) { + d.bi = &w32.BROWSEINFO{Flags: w32.BIF_RETURNONLYFSDIRS} + if b.Dlg.Title != "" { + d.bi.Title, _ = syscall.UTF16PtrFromString(b.Dlg.Title) + } + return d +} + +func (b *DirectoryBuilder) browse() (string, error) { + d := selectdir(b) + res := w32.SHBrowseForFolder(d.bi) + if res == 0 { + return "", Cancelled + } + return w32.SHGetPathFromIDList(res), nil +} |