384 lines
11 KiB
Go
384 lines
11 KiB
Go
package zenity
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import (
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"strconv"
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"syscall"
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"unsafe"
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)
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func entry(text string, opts options) (string, bool, error) {
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var title string
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if opts.title != nil {
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title = *opts.title
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}
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if opts.okLabel == nil {
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opts.okLabel = stringPtr("OK")
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}
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if opts.cancelLabel == nil {
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opts.cancelLabel = stringPtr("Cancel")
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}
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return editBox(title, text, opts)
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}
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func password(opts options) (string, string, bool, error) {
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opts.hideText = true
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pass, ok, err := entry("Password:", opts)
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return "", pass, ok, err
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}
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var (
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registerClassEx = user32.NewProc("RegisterClassExW")
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unregisterClass = user32.NewProc("UnregisterClassW")
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createWindowEx = user32.NewProc("CreateWindowExW")
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destroyWindow = user32.NewProc("DestroyWindow")
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isDialogMessage = user32.NewProc("IsDialogMessageW")
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translateMessage = user32.NewProc("TranslateMessage")
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dispatchMessage = user32.NewProc("DispatchMessageW")
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postQuitMessage = user32.NewProc("PostQuitMessage")
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defWindowProc = user32.NewProc("DefWindowProcW")
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getWindowRect = user32.NewProc("GetWindowRect")
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setWindowPos = user32.NewProc("SetWindowPos")
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setFocus = user32.NewProc("SetFocus")
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showWindow = user32.NewProc("ShowWindow")
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systemParametersInfo = user32.NewProc("SystemParametersInfoW")
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getSystemMetrics = user32.NewProc("GetSystemMetrics")
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getWindowDC = user32.NewProc("GetWindowDC")
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releaseDC = user32.NewProc("ReleaseDC")
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getDpiForWindow = user32.NewProc("GetDpiForWindow")
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deleteObject = gdi32.NewProc("DeleteObject")
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getDeviceCaps = gdi32.NewProc("GetDeviceCaps")
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createFontIndirect = gdi32.NewProc("CreateFontIndirectW")
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)
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// https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-wndclassexw
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type _WNDCLASSEX struct {
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Size uint32
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Style uint32
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WndProc uintptr
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ClsExtra int32
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WndExtra int32
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Instance uintptr
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Icon uintptr
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Cursor uintptr
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Background uintptr
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MenuName *uint16
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ClassName *uint16
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IconSm uintptr
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}
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// https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-msg
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type _MSG struct {
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Owner syscall.Handle
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Message uint32
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WParam uintptr
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LParam uintptr
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Time uint32
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Pt _POINT
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}
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// https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-nonclientmetricsw
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type _NONCLIENTMETRICS struct {
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Size uint32
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BorderWidth int32
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ScrollWidth int32
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ScrollHeight int32
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CaptionWidth int32
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CaptionHeight int32
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CaptionFont _LOGFONT
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SmCaptionWidth int32
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SmCaptionHeight int32
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SmCaptionFont _LOGFONT
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MenuWidth int32
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MenuHeight int32
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MenuFont _LOGFONT
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StatusFont _LOGFONT
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MessageFont _LOGFONT
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}
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// https://docs.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-logfontw
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type _LOGFONT struct {
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Height int32
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Width int32
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Escapement int32
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Orientation int32
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Weight int32
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Italic byte
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Underline byte
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StrikeOut byte
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CharSet byte
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OutPrecision byte
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ClipPrecision byte
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Quality byte
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PitchAndFamily byte
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FaceName [32]uint16
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}
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// https://docs.microsoft.com/en-us/windows/win32/api/windef/ns-windef-point
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type _POINT struct {
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x, y int32
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}
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// https://docs.microsoft.com/en-us/windows/win32/api/windef/ns-windef-rect
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type _RECT struct {
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left int32
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top int32
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right int32
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bottom int32
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}
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type dpi uintptr
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func getDPI(wnd uintptr) dpi {
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var res uintptr
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if wnd != 0 && getDpiForWindow.Find() == nil {
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res, _, _ = getDpiForWindow.Call(wnd)
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} else if dc, _, _ := getWindowDC.Call(wnd); dc != 0 {
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res, _, _ = getDeviceCaps.Call(dc, 90) // LOGPIXELSY
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releaseDC.Call(0, dc)
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}
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if res == 0 {
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return 96 // USER_DEFAULT_SCREEN_DPI
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}
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return dpi(res)
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}
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func (d dpi) Scale(dim uintptr) uintptr {
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if d == 0 {
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return dim
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}
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return dim * uintptr(d) / 96 // USER_DEFAULT_SCREEN_DPI
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}
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type font struct {
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handle uintptr
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face _LOGFONT
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}
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func getFont() font {
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var metrics _NONCLIENTMETRICS
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metrics.Size = uint32(unsafe.Sizeof(metrics))
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systemParametersInfo.Call(0x29, // SPI_GETNONCLIENTMETRICS
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unsafe.Sizeof(metrics), uintptr(unsafe.Pointer(&metrics)), 0)
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return font{face: metrics.MessageFont}
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}
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func (f *font) ForDPI(dpi dpi) uintptr {
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if h := -int32(dpi.Scale(12)); f.handle == 0 || f.face.Height != h {
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f.Delete()
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f.face.Height = h
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f.handle, _, _ = createFontIndirect.Call(uintptr(unsafe.Pointer(&f.face)))
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}
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return f.handle
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}
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func (f *font) Delete() {
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if f.handle != 0 {
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deleteObject.Call(f.handle)
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f.handle = 0
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}
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}
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func getWindowTextString(wnd uintptr) string {
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len, _, _ := getWindowTextLength.Call(wnd)
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buf := make([]uint16, len+1)
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getWindowText.Call(wnd, uintptr(unsafe.Pointer(&buf[0])), len+1)
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return syscall.UTF16ToString(buf)
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}
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func centerWindow(wnd uintptr) {
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getMetric := func(i uintptr) int32 {
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ret, _, _ := getSystemMetrics.Call(i)
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return int32(ret)
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}
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var rect _RECT
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getWindowRect.Call(wnd, uintptr(unsafe.Pointer(&rect)))
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x := (getMetric(0 /* SM_CXSCREEN */) - (rect.right - rect.left)) / 2
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y := (getMetric(1 /* SM_CYSCREEN */) - (rect.bottom - rect.top)) / 2
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setWindowPos.Call(wnd, 0, uintptr(x), uintptr(y), 0, 0, 0x5) // SWP_NOZORDER|SWP_NOSIZE
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}
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func registerClass(instance, proc uintptr) (uintptr, error) {
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name := "WC_" + strconv.FormatUint(uint64(proc), 16)
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var wcx _WNDCLASSEX
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wcx.Size = uint32(unsafe.Sizeof(wcx))
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wcx.WndProc = proc
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wcx.Instance = instance
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wcx.Background = 5 // COLOR_WINDOW
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wcx.ClassName = syscall.StringToUTF16Ptr(name)
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ret, _, err := registerClassEx.Call(uintptr(unsafe.Pointer(&wcx)))
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return ret, err
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}
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// https://docs.microsoft.com/en-us/windows/win32/winmsg/using-messages-and-message-queues
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func messageLoop(wnd uintptr) error {
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getMessage := getMessage.Addr()
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isDialogMessage := isDialogMessage.Addr()
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translateMessage := translateMessage.Addr()
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dispatchMessage := dispatchMessage.Addr()
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for {
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var msg _MSG
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ret, _, err := syscall.Syscall6(getMessage, 4, uintptr(unsafe.Pointer(&msg)), 0, 0, 0, 0, 0)
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if int32(ret) == -1 {
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return err
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}
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if ret == 0 {
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return nil
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}
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ret, _, _ = syscall.Syscall(isDialogMessage, 2, wnd, uintptr(unsafe.Pointer(&msg)), 0)
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if ret == 0 {
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syscall.Syscall(translateMessage, 1, uintptr(unsafe.Pointer(&msg)), 0, 0)
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syscall.Syscall(dispatchMessage, 1, uintptr(unsafe.Pointer(&msg)), 0, 0)
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}
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}
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}
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func editBox(title, text string, opts options) (out string, ok bool, err error) {
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var wnd, textCtl, editCtl uintptr
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var okBtn, cancelBtn, extraBtn uintptr
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defWindowProc := defWindowProc.Addr()
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defer setup()()
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font := getFont()
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defer font.Delete()
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layout := func(dpi dpi) {
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hfont := font.ForDPI(dpi)
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sendMessage.Call(textCtl, 0x0030 /* WM_SETFONT */, hfont, 1)
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sendMessage.Call(editCtl, 0x0030 /* WM_SETFONT */, hfont, 1)
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sendMessage.Call(okBtn, 0x0030 /* WM_SETFONT */, hfont, 1)
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sendMessage.Call(cancelBtn, 0x0030 /* WM_SETFONT */, hfont, 1)
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setWindowPos.Call(wnd, 0, 0, 0, dpi.Scale(281), dpi.Scale(140), 0x6) // SWP_NOZORDER|SWP_NOMOVE
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setWindowPos.Call(textCtl, 0, dpi.Scale(12), dpi.Scale(10), dpi.Scale(241), dpi.Scale(16), 0x4) // SWP_NOZORDER
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setWindowPos.Call(editCtl, 0, dpi.Scale(12), dpi.Scale(30), dpi.Scale(241), dpi.Scale(24), 0x4) // SWP_NOZORDER
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if extraBtn == 0 {
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setWindowPos.Call(okBtn, 0, dpi.Scale(95), dpi.Scale(65), dpi.Scale(75), dpi.Scale(24), 0x4) // SWP_NOZORDER
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setWindowPos.Call(cancelBtn, 0, dpi.Scale(178), dpi.Scale(65), dpi.Scale(75), dpi.Scale(24), 0x4) // SWP_NOZORDER
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} else {
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sendMessage.Call(extraBtn, 0x0030 /* WM_SETFONT */, hfont, 1)
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setWindowPos.Call(okBtn, 0, dpi.Scale(12), dpi.Scale(65), dpi.Scale(75), dpi.Scale(24), 0x4) // SWP_NOZORDER
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setWindowPos.Call(extraBtn, 0, dpi.Scale(95), dpi.Scale(65), dpi.Scale(75), dpi.Scale(24), 0x4) // SWP_NOZORDER
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setWindowPos.Call(cancelBtn, 0, dpi.Scale(178), dpi.Scale(65), dpi.Scale(75), dpi.Scale(24), 0x4) // SWP_NOZORDER
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}
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}
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proc := func(wnd uintptr, msg uint32, wparam, lparam uintptr) uintptr {
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switch msg {
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case 0x0002: // WM_DESTROY
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postQuitMessage.Call(0)
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case 0x0010: // WM_CLOSE
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destroyWindow.Call(wnd)
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case 0x0111: // WM_COMMAND
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switch wparam {
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default:
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return 1
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case 1, 6: // IDOK, IDYES
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out = getWindowTextString(editCtl)
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ok = true
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case 2: // IDCANCEL
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case 7: // IDNO
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err = ErrExtraButton
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}
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destroyWindow.Call(wnd)
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case 0x02e0: // WM_DPICHANGED
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layout(dpi(uint32(wparam) >> 16))
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default:
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ret, _, _ := syscall.Syscall6(defWindowProc, 4, wnd, uintptr(msg), wparam, lparam, 0, 0)
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return ret
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}
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return 0
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}
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if opts.ctx != nil && opts.ctx.Err() != nil {
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return "", false, opts.ctx.Err()
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}
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instance, _, err := getModuleHandle.Call(0)
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if instance == 0 {
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return "", false, err
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}
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cls, err := registerClass(instance, syscall.NewCallback(proc))
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if cls == 0 {
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return "", false, err
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}
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defer unregisterClass.Call(cls, instance)
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wnd, _, _ = createWindowEx.Call(0x10101, // WS_EX_CONTROLPARENT|WS_EX_WINDOWEDGE|WS_EX_DLGMODALFRAME
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cls, strptr(title),
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0x84c80000, // WS_POPUPWINDOW|WS_CLIPSIBLINGS|WS_DLGFRAME
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0x80000000, // CW_USEDEFAULT
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0x80000000, // CW_USEDEFAULT
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281, 140, 0, 0, instance)
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textCtl, _, _ = createWindowEx.Call(0,
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strptr("STATIC"), strptr(text),
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0x5002e080, // WS_CHILD|WS_VISIBLE|WS_GROUP|SS_WORDELLIPSIS|SS_EDITCONTROL|SS_NOPREFIX
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12, 10, 241, 16, wnd, 0, instance)
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var flags uintptr = 0x50030080 // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP|ES_AUTOHSCROLL
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if opts.hideText {
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flags |= 0x20 // ES_PASSWORD
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}
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editCtl, _, _ = createWindowEx.Call(0x200, // WS_EX_CLIENTEDGE
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strptr("EDIT"), strptr(opts.entryText),
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flags,
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12, 30, 241, 24, wnd, 0, instance)
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okBtn, _, _ = createWindowEx.Call(0,
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strptr("BUTTON"), strptr(*opts.okLabel),
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0x50030001, // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP|BS_DEFPUSHBUTTON
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12, 65, 75, 24, wnd, 1 /* IDOK */, instance)
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cancelBtn, _, _ = createWindowEx.Call(0,
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strptr("BUTTON"), strptr(*opts.cancelLabel),
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0x50010000, // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP
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12, 65, 75, 24, wnd, 2 /* IDCANCEL */, instance)
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if opts.extraButton != nil {
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extraBtn, _, _ = createWindowEx.Call(0,
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strptr("BUTTON"), strptr(*opts.extraButton),
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0x50010000, // WS_CHILD|WS_VISIBLE|WS_GROUP|WS_TABSTOP
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12, 65, 75, 24, wnd, 7 /* IDNO */, instance)
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}
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layout(getDPI(wnd))
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centerWindow(wnd)
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setFocus.Call(editCtl)
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showWindow.Call(wnd, 1 /* SW_SHOWNORMAL */, 0)
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sendMessage.Call(editCtl, 0xb1 /* EM_SETSEL */, 0, intptr(-1))
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if opts.ctx != nil {
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wait := make(chan struct{})
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defer close(wait)
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go func() {
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select {
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case <-opts.ctx.Done():
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sendMessage.Call(wnd, 0x0112 /* WM_SYSCOMMAND */, 0xf060 /* SC_CLOSE */, 0)
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case <-wait:
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}
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}()
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}
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// set default values
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out, ok, err = "", false, nil
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if err := messageLoop(wnd); err != nil {
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return "", false, err
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}
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if opts.ctx != nil && opts.ctx.Err() != nil {
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return "", false, opts.ctx.Err()
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}
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return out, ok, err
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}
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