Refactor (windows).

color_windows.go

@@ -27,7 +27,7 @@ func selectColor(opts options) (color.Color, error) {
 
 	var args win.CHOOSECOLOR
 	args.StructSize = uint32(unsafe.Sizeof(args))
-	args.Owner, _ = opts.attach.(uintptr)
+	args.Owner, _ = opts.attach.(win.HWND)
 	args.CustColors = &customColors
 
 	if opts.color != nil {

const_windows.go

@@ -37,22 +37,6 @@ const (
 	_SWP_NOMOVE   = 0x0002
 	_SWP_NOZORDER = 0x0004
 
-	_MB_OKCANCEL        = 0x00000001
-	_MB_YESNOCANCEL     = 0x00000003
-	_MB_YESNO           = 0x00000004
-	_MB_ICONERROR       = 0x00000010
-	_MB_ICONQUESTION    = 0x00000020
-	_MB_ICONWARNING     = 0x00000030
-	_MB_ICONINFORMATION = 0x00000040
-	_MB_DEFBUTTON1      = 0x00000000
-	_MB_DEFBUTTON2      = 0x00000100
-	_MB_DEFBUTTON3      = 0x00000200
-
-	_IDOK     = 1
-	_IDCANCEL = 2
-	_IDYES    = 6
-	_IDNO     = 7
-
 	_SC_CLOSE = 0xf060
 
 	_WM_DESTROY     = 0x0002

date_windows.go

@@ -4,6 +4,8 @@ import (
 	"syscall"
 	"time"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 func calendar(text string, opts options) (time.Time, error) {
@@ -56,12 +58,12 @@ func (dlg *calendarDialog) setup(text string, opts options) (time.Time, error) {
 	}
 	defer unregisterClass.Call(cls, instance)
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
 	dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
 		cls, strptr(*opts.title),
 		_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
 		_CW_USEDEFAULT, _CW_USEDEFAULT,
-		281, 281, owner, 0, instance, uintptr(unsafe.Pointer(dlg)))
+		281, 281, uintptr(owner), 0, instance, uintptr(unsafe.Pointer(dlg)))
 
 	dlg.textCtl, _, _ = createWindowEx.Call(0,
 		strptr("STATIC"), strptr(text),
@@ -77,16 +79,16 @@ func (dlg *calendarDialog) setup(text string, opts options) (time.Time, error) {
 	dlg.okBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.okLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON,
-		12, 206, 75, 24, dlg.wnd, _IDOK, instance, 0)
+		12, 206, 75, 24, dlg.wnd, win.IDOK, instance, 0)
 	dlg.cancelBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.cancelLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-		12, 206, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
+		12, 206, 75, 24, dlg.wnd, win.IDCANCEL, instance, 0)
 	if opts.extraButton != nil {
 		dlg.extraBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.extraButton),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 206, 75, 24, dlg.wnd, _IDNO, instance, 0)
+			12, 206, 75, 24, dlg.wnd, win.IDNO, instance, 0)
 	}
 
 	if opts.time != nil {
@@ -168,13 +170,13 @@ func calendarProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointe
 		switch wparam {
 		default:
 			return 1
-		case _IDOK, _IDYES:
+		case win.IDOK, win.IDYES:
 			var date _SYSTEMTIME
 			sendMessage.Call(dlg.dateCtl, _MCM_GETCURSEL, 0, uintptr(unsafe.Pointer(&date)))
 			dlg.out = time.Date(int(date.year), time.Month(date.month), int(date.day), 0, 0, 0, 0, time.UTC)
-		case _IDCANCEL:
+		case win.IDCANCEL:
 			dlg.err = ErrCanceled
-		case _IDNO:
+		case win.IDNO:
 			dlg.err = ErrExtraButton
 		}
 		destroyWindow.Call(wnd)

entry_windows.go

@@ -3,6 +3,8 @@ package zenity
 import (
 	"syscall"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 func entry(text string, opts options) (string, error) {
@@ -55,12 +57,12 @@ func (dlg *entryDialog) setup(text string, opts options) (string, error) {
 	}
 	defer unregisterClass.Call(cls, instance)
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
 	dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
 		cls, strptr(*opts.title),
 		_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
 		_CW_USEDEFAULT, _CW_USEDEFAULT,
-		281, 141, owner, 0, instance, uintptr(unsafe.Pointer(dlg)))
+		281, 141, uintptr(owner), 0, instance, uintptr(unsafe.Pointer(dlg)))
 
 	dlg.textCtl, _, _ = createWindowEx.Call(0,
 		strptr("STATIC"), strptr(text),
@@ -79,16 +81,16 @@ func (dlg *entryDialog) setup(text string, opts options) (string, error) {
 	dlg.okBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.okLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON,
-		12, 66, 75, 24, dlg.wnd, _IDOK, instance, 0)
+		12, 66, 75, 24, dlg.wnd, win.IDOK, instance, 0)
 	dlg.cancelBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.cancelLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-		12, 66, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
+		12, 66, 75, 24, dlg.wnd, win.IDCANCEL, instance, 0)
 	if opts.extraButton != nil {
 		dlg.extraBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.extraButton),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 66, 75, 24, dlg.wnd, _IDNO, instance, 0)
+			12, 66, 75, 24, dlg.wnd, win.IDNO, instance, 0)
 	}
 
 	dlg.layout(getDPI(dlg.wnd))
@@ -162,11 +164,11 @@ func entryProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointer)
 		switch wparam {
 		default:
 			return 1
-		case _IDOK, _IDYES:
+		case win.IDOK, win.IDYES:
 			dlg.out = getWindowString(dlg.editCtl)
-		case _IDCANCEL:
+		case win.IDCANCEL:
 			dlg.err = ErrCanceled
-		case _IDNO:
+		case win.IDNO:
 			dlg.err = ErrExtraButton
 		}
 		destroyWindow.Call(wnd)

file_windows.go

@@ -27,7 +27,7 @@ func selectFile(opts options) (string, error) {
 
 	var args win.OPENFILENAME
 	args.StructSize = uint32(unsafe.Sizeof(args))
-	args.Owner, _ = opts.attach.(uintptr)
+	args.Owner, _ = opts.attach.(win.HWND)
 	args.Flags = win.OFN_NOCHANGEDIR | win.OFN_FILEMUSTEXIST | win.OFN_EXPLORER
 
 	if opts.title != nil {
@@ -73,7 +73,7 @@ func selectFileMultiple(opts options) ([]string, error) {
 
 	var args win.OPENFILENAME
 	args.StructSize = uint32(unsafe.Sizeof(args))
-	args.Owner, _ = opts.attach.(uintptr)
+	args.Owner, _ = opts.attach.(win.HWND)
 	args.Flags = win.OFN_NOCHANGEDIR | win.OFN_ALLOWMULTISELECT | win.OFN_FILEMUSTEXIST | win.OFN_EXPLORER
 
 	if opts.title != nil {
@@ -144,7 +144,7 @@ func selectFileSave(opts options) (string, error) {
 
 	var args win.OPENFILENAME
 	args.StructSize = uint32(unsafe.Sizeof(args))
-	args.Owner, _ = opts.attach.(uintptr)
+	args.Owner, _ = opts.attach.(win.HWND)
 	args.Flags = win.OFN_NOCHANGEDIR | win.OFN_PATHMUSTEXIST | win.OFN_NOREADONLYRETURN | win.OFN_EXPLORER
 
 	if opts.title != nil {
@@ -252,8 +252,8 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 		defer unhook()
 	}
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
-	hr, _, _ = dialog.Call(dialog.Show, owner)
+	hr, _, _ = dialog.Call(dialog.Show, uintptr(owner))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", nil, opts.ctx.Err()
 	}
@@ -313,7 +313,7 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 
 func browseForFolder(opts options) (string, []string, error) {
 	var args win.BROWSEINFO
-	args.Owner, _ = opts.attach.(uintptr)
+	args.Owner, _ = opts.attach.(win.HWND)
 	args.Flags = 0x1 // BIF_RETURNONLYFSDIRS
 
 	if opts.title != nil {

internal/win/comdlg32.go

@@ -17,8 +17,8 @@ const (
 // https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-choosecolorw-r1
 type CHOOSECOLOR struct {
 	StructSize   uint32
-	Owner        uintptr
+	Owner        HWND
-	Instance     uintptr
+	Instance     HWND
 	RgbResult    uint32
 	CustColors   *[16]uint32
 	Flags        uint32
@@ -42,8 +42,8 @@ const (
 // https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-openfilenamew
 type OPENFILENAME struct {
 	StructSize      uint32
-	Owner           uintptr
+	Owner           HWND
-	Instance        uintptr
+	Instance        Handle
 	Filter          *uint16
 	CustomFilter    *uint16
 	MaxCustomFilter uint32

internal/win/gdi32.go

@@ -0,0 +1,30 @@
+//go:build windows
+
+package win
+
+const (
+	LOGPIXELSX = 88
+	LOGPIXELSY = 90
+)
+
+// https://docs.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-logfontw
+type LOGFONT struct {
+	Height         int32
+	Width          int32
+	Escapement     int32
+	Orientation    int32
+	Weight         int32
+	Italic         byte
+	Underline      byte
+	StrikeOut      byte
+	CharSet        byte
+	OutPrecision   byte
+	ClipPrecision  byte
+	Quality        byte
+	PitchAndFamily byte
+	FaceName       [32]uint16
+}
+
+//sys CreateFontIndirect(lf *LOGFONT) (font Handle) = gdi32.CreateFontIndirectW
+//sys DeleteObject(o Handle) (ok bool) = gdi32.DeleteObject
+//sys GetDeviceCaps(dc Handle, index int) (cap uintptr) = gdi32.GetDeviceCaps

internal/win/generate.go

@@ -1,5 +1,6 @@
-// Package win is internal. DO NOT USE.
+//go:build generate
-package win
 
 //go:generate -command mkwinsyscall go run golang.org/x/sys/windows/mkwinsyscall -output zsyscall_windows.go
-//go:generate mkwinsyscall comctl32.go comdlg32.go ole32.go shell32.go
+//go:generate mkwinsyscall comctl32.go comdlg32.go gdi32.go ole32.go shell32.go user32.go
+
+package win

internal/win/shell32.go

@@ -9,7 +9,7 @@ const (
 
 // https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/ns-shlobj_core-browseinfow
 type BROWSEINFO struct {
-	Owner        uintptr
+	Owner        HWND
 	Root         uintptr
 	DisplayName  *uint16
 	Title        *uint16
@@ -22,11 +22,11 @@ type BROWSEINFO struct {
 // https://docs.microsoft.com/en-us/windows/win32/api/shellapi/ns-shellapi-notifyicondataw
 type NOTIFYICONDATA struct {
 	StructSize      uint32
-	Wnd             uintptr
+	Wnd             HWND
 	ID              uint32
 	Flags           uint32
 	CallbackMessage uint32
-	Icon            uintptr
+	Icon            Handle
 	Tip             [128]uint16 // NOTIFYICONDATAA_V1_SIZE
 	State           uint32
 	StateMask       uint32
@@ -34,8 +34,8 @@ type NOTIFYICONDATA struct {
 	Version         uint32
 	InfoTitle       [64]uint16
 	InfoFlags       uint32
-	// GuidItem     [16]byte       // NOTIFYICONDATAA_V2_SIZE
+	// GuidItem     [16]byte // NOTIFYICONDATAA_V2_SIZE
-	// BalloonIcon  syscall.Handle // NOTIFYICONDATAA_V3_SIZE
+	// BalloonIcon  Handle   // NOTIFYICONDATAA_V3_SIZE
 }
 
 type IShellItem struct {

internal/win/user32.go

@@ -0,0 +1,34 @@
+//go:build windows
+
+package win
+
+import "golang.org/x/sys/windows"
+
+const (
+	IDOK     = 1
+	IDCANCEL = 2
+	IDABORT  = 3
+	IDRETRY  = 4
+	IDIGNORE = 5
+	IDYES    = 6
+	IDNO     = 7
+
+	MB_OK                = windows.MB_OK
+	MB_OKCANCEL          = windows.MB_OKCANCEL
+	MB_ABORTRETRYIGNORE  = windows.MB_ABORTRETRYIGNORE
+	MB_YESNOCANCEL       = windows.MB_YESNOCANCEL
+	MB_YESNO             = windows.MB_YESNO
+	MB_RETRYCANCEL       = windows.MB_RETRYCANCEL
+	MB_CANCELTRYCONTINUE = windows.MB_CANCELTRYCONTINUE
+	MB_ICONERROR         = windows.MB_ICONERROR
+	MB_ICONQUESTION      = windows.MB_ICONQUESTION
+	MB_ICONWARNING       = windows.MB_ICONWARNING
+	MB_ICONINFORMATION   = windows.MB_ICONINFORMATION
+	MB_DEFBUTTON1        = windows.MB_DEFBUTTON1
+	MB_DEFBUTTON2        = windows.MB_DEFBUTTON2
+	MB_DEFBUTTON3        = windows.MB_DEFBUTTON3
+)
+
+func MessageBox(hwnd HWND, text *uint16, caption *uint16, boxtype uint32) (ret int32, err error) {
+	return windows.MessageBox(hwnd, text, caption, boxtype)
+}

internal/win/win32.go

@@ -0,0 +1,9 @@
+//go:build windows
+
+// Package win is internal. DO NOT USE.
+package win
+
+import "golang.org/x/sys/windows"
+
+type Handle = windows.Handle
+type HWND = windows.HWND

internal/win/zsyscall_windows.go

@@ -40,6 +40,7 @@ func errnoErr(e syscall.Errno) error {
 var (
 	modcomctl32 = windows.NewLazySystemDLL("comctl32.dll")
 	modcomdlg32 = windows.NewLazySystemDLL("comdlg32.dll")
+	modgdi32    = windows.NewLazySystemDLL("gdi32.dll")
 	modole32    = windows.NewLazySystemDLL("ole32.dll")
 	modshell32  = windows.NewLazySystemDLL("shell32.dll")
 
@@ -48,6 +49,9 @@ var (
 	procCommDlgExtendedError        = modcomdlg32.NewProc("CommDlgExtendedError")
 	procGetOpenFileNameW            = modcomdlg32.NewProc("GetOpenFileNameW")
 	procGetSaveFileNameW            = modcomdlg32.NewProc("GetSaveFileNameW")
+	procCreateFontIndirectW         = modgdi32.NewProc("CreateFontIndirectW")
+	procDeleteObject                = modgdi32.NewProc("DeleteObject")
+	procGetDeviceCaps               = modgdi32.NewProc("GetDeviceCaps")
 	procCoCreateInstance            = modole32.NewProc("CoCreateInstance")
 	procCoTaskMemFree               = modole32.NewProc("CoTaskMemFree")
 	procSHBrowseForFolder           = modshell32.NewProc("SHBrowseForFolder")
@@ -86,6 +90,24 @@ func GetSaveFileName(ofn *OPENFILENAME) (ok bool) {
 	return
 }
 
+func CreateFontIndirect(lf *LOGFONT) (font Handle) {
+	r0, _, _ := syscall.Syscall(procCreateFontIndirectW.Addr(), 1, uintptr(unsafe.Pointer(lf)), 0, 0)
+	font = Handle(r0)
+	return
+}
+
+func DeleteObject(o Handle) (ok bool) {
+	r0, _, _ := syscall.Syscall(procDeleteObject.Addr(), 1, uintptr(o), 0, 0)
+	ok = r0 != 0
+	return
+}
+
+func GetDeviceCaps(dc Handle, index int) (cap uintptr) {
+	r0, _, _ := syscall.Syscall(procGetDeviceCaps.Addr(), 2, uintptr(dc), uintptr(index), 0)
+	cap = uintptr(r0)
+	return
+}
+
 func CoCreateInstance(clsid uintptr, unkOuter unsafe.Pointer, clsContext int32, iid uintptr, address unsafe.Pointer) (ret error) {
 	r0, _, _ := syscall.Syscall6(procCoCreateInstance.Addr(), 5, uintptr(clsid), uintptr(unkOuter), uintptr(clsContext), uintptr(iid), uintptr(address), 0)
 	if r0 != 0 {

internal/zenutil/osa_generate.go

@@ -1,3 +0,0 @@
-package zenutil
-
-//go:generate go run osa_generator.go osascripts/

internal/zenutil/osa_generated.go

@@ -1,4 +1,5 @@
 // Code generated by zenity; DO NOT EDIT.
+
 //go:build darwin
 
 package zenutil

internal/zenutil/osa_generator.go

@@ -1,4 +1,6 @@
-//go:build tools
+//go:build generate
+
+//go:generate go run osa_generator.go osascripts/
 
 package main
 
@@ -102,6 +104,7 @@ func minify(data []byte) ([]byte, error) {
 }
 
 var generator = template.Must(template.New("").Parse(`// Code generated by zenity; DO NOT EDIT.
+
 //go:build darwin
 
 package zenutil

internal/zenutil/window_windows.go

@@ -1,11 +1,15 @@
 package zenutil
 
-import "strconv"
+import (
+	"strconv"
+
+	"golang.org/x/sys/windows"
+)
 
 // ParseWindowId is internal.
-func ParseWindowId(id string) uintptr {
+func ParseWindowId(id string) windows.HWND {
 	hwnd, _ := strconv.ParseUint(id, 0, 64)
-	return uintptr(hwnd)
+	return windows.HWND(uintptr(hwnd))
 }
 
 // GetParentWindowId is internal.

list_windows.go

@@ -3,6 +3,8 @@ package zenity
 import (
 	"syscall"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 func list(text string, items []string, opts options) (string, error) {
@@ -72,12 +74,12 @@ func (dlg *listDialog) setup(text string, opts options) ([]string, error) {
 	}
 	defer unregisterClass.Call(cls, instance)
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
 	dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
 		cls, strptr(*opts.title),
 		_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
 		_CW_USEDEFAULT, _CW_USEDEFAULT,
-		281, 281, owner, 0, instance, uintptr(unsafe.Pointer(dlg)))
+		281, 281, uintptr(owner), 0, instance, uintptr(unsafe.Pointer(dlg)))
 
 	dlg.textCtl, _, _ = createWindowEx.Call(0,
 		strptr("STATIC"), strptr(text),
@@ -96,16 +98,16 @@ func (dlg *listDialog) setup(text string, opts options) ([]string, error) {
 	dlg.okBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.okLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON,
-		12, 206, 75, 24, dlg.wnd, _IDOK, instance, 0)
+		12, 206, 75, 24, dlg.wnd, win.IDOK, instance, 0)
 	dlg.cancelBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.cancelLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-		12, 206, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
+		12, 206, 75, 24, dlg.wnd, win.IDCANCEL, instance, 0)
 	if opts.extraButton != nil {
 		dlg.extraBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.extraButton),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 206, 75, 24, dlg.wnd, _IDNO, instance, 0)
+			12, 206, 75, 24, dlg.wnd, win.IDNO, instance, 0)
 	}
 
 	for _, item := range dlg.items {
@@ -182,7 +184,7 @@ func listProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointer) u
 		switch wparam {
 		default:
 			return 1
-		case _IDOK, _IDYES:
+		case win.IDOK, win.IDYES:
 			if dlg.multiple {
 				if len, _, _ := sendMessage.Call(dlg.listCtl, _LB_GETSELCOUNT, 0, 0); int32(len) >= 0 {
 					dlg.out = make([]string, len)
@@ -201,9 +203,9 @@ func listProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointer) u
 					dlg.out = []string{}
 				}
 			}
-		case _IDCANCEL:
+		case win.IDCANCEL:
 			dlg.err = ErrCanceled
-		case _IDNO:
+		case win.IDNO:
 			dlg.err = ErrExtraButton
 		}
 		destroyWindow.Call(wnd)

msg_windows.go

@@ -4,54 +4,55 @@ import (
 	"context"
 	"syscall"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 var (
 	getDlgCtrlID = user32.NewProc("GetDlgCtrlID")
-	messageBox   = user32.NewProc("MessageBoxW")
 )
 
 func message(kind messageKind, text string, opts options) error {
-	var flags uintptr
+	var flags uint32
 
 	switch {
 	case kind == questionKind && opts.extraButton != nil:
-		flags |= _MB_YESNOCANCEL
+		flags |= win.MB_YESNOCANCEL
 	case kind == questionKind:
-		flags |= _MB_OKCANCEL
+		flags |= win.MB_OKCANCEL
 	case opts.extraButton != nil:
-		flags |= _MB_YESNO
+		flags |= win.MB_YESNO
 	}
 
 	switch opts.icon {
 	case ErrorIcon:
-		flags |= _MB_ICONERROR
+		flags |= win.MB_ICONERROR
 	case QuestionIcon:
-		flags |= _MB_ICONQUESTION
+		flags |= win.MB_ICONQUESTION
 	case WarningIcon:
-		flags |= _MB_ICONWARNING
+		flags |= win.MB_ICONWARNING
 	case InfoIcon:
-		flags |= _MB_ICONINFORMATION
+		flags |= win.MB_ICONINFORMATION
 	case NoIcon:
 		//
 	default:
 		switch kind {
 		case errorKind:
-			flags |= _MB_ICONERROR
+			flags |= win.MB_ICONERROR
 		case questionKind:
-			flags |= _MB_ICONQUESTION
+			flags |= win.MB_ICONQUESTION
 		case warningKind:
-			flags |= _MB_ICONWARNING
+			flags |= win.MB_ICONWARNING
 		case infoKind:
-			flags |= _MB_ICONINFORMATION
+			flags |= win.MB_ICONINFORMATION
 		}
 	}
 
 	if kind == questionKind && opts.defaultCancel {
 		if opts.extraButton == nil {
-			flags |= _MB_DEFBUTTON2
+			flags |= win.MB_DEFBUTTON2
 		} else {
-			flags |= _MB_DEFBUTTON3
+			flags |= win.MB_DEFBUTTON3
 		}
 	}
 
@@ -70,18 +71,18 @@ func message(kind messageKind, text string, opts options) error {
 		title = syscall.StringToUTF16Ptr(*opts.title)
 	}
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
-	s, _, err := messageBox.Call(owner, strptr(text), uintptr(unsafe.Pointer(title)), flags)
+	s, err := win.MessageBox(owner, syscall.StringToUTF16Ptr(text), title, flags)
 
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return opts.ctx.Err()
 	}
 	switch s {
-	case _IDOK, _IDYES:
+	case win.IDOK, win.IDYES:
 		return nil
-	case _IDCANCEL:
+	case win.IDCANCEL:
 		return ErrCanceled
-	case _IDNO:
+	case win.IDNO:
 		return ErrExtraButton
 	default:
 		return err
@@ -101,11 +102,11 @@ func hookMessageDialogCallback(wnd uintptr, lparam *options) uintptr {
 
 	var text *string
 	switch ctl {
-	case _IDOK, _IDYES:
+	case win.IDOK, win.IDYES:
 		text = lparam.okLabel
-	case _IDCANCEL:
+	case win.IDCANCEL:
 		text = lparam.cancelLabel
-	case _IDNO:
+	case win.IDNO:
 		text = lparam.extraButton
 	}
 	if text != nil {

notify_windows.go

@@ -46,7 +46,7 @@ func notify(text string, opts options) error {
 		icon := getIcon(opts.icon)
 		if icon.handle != 0 {
 			defer icon.delete()
-			args.Icon = icon.handle
+			args.Icon = win.Handle(icon.handle)
 			args.Flags |= 0x00000002 // NIF_ICON
 			args.InfoFlags |= 0x4    // NIIF_USER
 		}
@@ -90,13 +90,13 @@ func wtsMessage(text string, opts options) error {
 
 	switch opts.icon {
 	case ErrorIcon:
-		flags |= _MB_ICONERROR
+		flags |= win.MB_ICONERROR
 	case QuestionIcon:
-		flags |= _MB_ICONQUESTION
+		flags |= win.MB_ICONQUESTION
 	case WarningIcon:
-		flags |= _MB_ICONWARNING
+		flags |= win.MB_ICONWARNING
 	case InfoIcon:
-		flags |= _MB_ICONINFORMATION
+		flags |= win.MB_ICONINFORMATION
 	}
 
 	title := opts.title

progress_windows.go

@@ -5,6 +5,8 @@ import (
 	"sync"
 	"syscall"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 func progress(opts options) (ProgressDialog, error) {
@@ -135,12 +137,12 @@ func (dlg *progressDialog) setup(opts options) error {
 	}
 	defer unregisterClass.Call(cls, instance)
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
 	dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
 		cls, strptr(*opts.title),
 		_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
 		_CW_USEDEFAULT, _CW_USEDEFAULT,
-		281, 133, owner, 0, instance, uintptr(unsafe.Pointer(dlg)))
+		281, 133, uintptr(owner), 0, instance, uintptr(unsafe.Pointer(dlg)))
 
 	dlg.textCtl, _, _ = createWindowEx.Call(0,
 		strptr("STATIC"), 0,
@@ -159,18 +161,18 @@ func (dlg *progressDialog) setup(opts options) error {
 	dlg.okBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.okLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON|_WS_DISABLED,
-		12, 58, 75, 24, dlg.wnd, _IDOK, instance, 0)
+		12, 58, 75, 24, dlg.wnd, win.IDOK, instance, 0)
 	if !opts.noCancel {
 		dlg.cancelBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.cancelLabel),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 58, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
+			12, 58, 75, 24, dlg.wnd, win.IDCANCEL, instance, 0)
 	}
 	if opts.extraButton != nil {
 		dlg.extraBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.extraButton),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 58, 75, 24, dlg.wnd, _IDNO, instance, 0)
+			12, 58, 75, 24, dlg.wnd, win.IDNO, instance, 0)
 	}
 
 	dlg.layout(getDPI(dlg.wnd))
@@ -256,11 +258,11 @@ func progressProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointe
 		switch wparam {
 		default:
 			return 1
-		case _IDOK, _IDYES:
+		case win.IDOK, win.IDYES:
 			//
-		case _IDCANCEL:
+		case win.IDCANCEL:
 			dlg.err = ErrCanceled
-		case _IDNO:
+		case win.IDNO:
 			dlg.err = ErrExtraButton
 		}
 		destroyWindow.Call(wnd)

pwd_windows.go

@@ -3,6 +3,8 @@ package zenity
 import (
 	"syscall"
 	"unsafe"
+
+	"github.com/ncruces/zenity/internal/win"
 )
 
 func password(opts options) (string, string, error) {
@@ -65,12 +67,12 @@ func (dlg *passwordDialog) setup(opts options) (string, string, error) {
 	}
 	defer unregisterClass.Call(cls, instance)
 
-	owner, _ := opts.attach.(uintptr)
+	owner, _ := opts.attach.(win.HWND)
 	dlg.wnd, _, _ = createWindowEx.Call(_WS_EX_CONTROLPARENT|_WS_EX_WINDOWEDGE|_WS_EX_DLGMODALFRAME,
 		cls, strptr(*opts.title),
 		_WS_POPUPWINDOW|_WS_CLIPSIBLINGS|_WS_DLGFRAME,
 		_CW_USEDEFAULT, _CW_USEDEFAULT,
-		281, 191, owner, 0, instance, uintptr(unsafe.Pointer(dlg)))
+		281, 191, uintptr(owner), 0, instance, uintptr(unsafe.Pointer(dlg)))
 
 	dlg.uTextCtl, _, _ = createWindowEx.Call(0,
 		strptr("STATIC"), strptr("Username:"),
@@ -96,16 +98,16 @@ func (dlg *passwordDialog) setup(opts options) (string, string, error) {
 	dlg.okBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.okLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP|_BS_DEFPUSHBUTTON,
-		12, 116, 75, 24, dlg.wnd, _IDOK, instance, 0)
+		12, 116, 75, 24, dlg.wnd, win.IDOK, instance, 0)
 	dlg.cancelBtn, _, _ = createWindowEx.Call(0,
 		strptr("BUTTON"), strptr(*opts.cancelLabel),
 		_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-		12, 116, 75, 24, dlg.wnd, _IDCANCEL, instance, 0)
+		12, 116, 75, 24, dlg.wnd, win.IDCANCEL, instance, 0)
 	if opts.extraButton != nil {
 		dlg.extraBtn, _, _ = createWindowEx.Call(0,
 			strptr("BUTTON"), strptr(*opts.extraButton),
 			_WS_CHILD|_WS_VISIBLE|_WS_GROUP|_WS_TABSTOP,
-			12, 116, 75, 24, dlg.wnd, _IDNO, instance, 0)
+			12, 116, 75, 24, dlg.wnd, win.IDNO, instance, 0)
 	}
 
 	dlg.layout(getDPI(dlg.wnd))
@@ -183,12 +185,12 @@ func passwordProc(wnd uintptr, msg uint32, wparam uintptr, lparam *unsafe.Pointe
 		switch wparam {
 		default:
 			return 1
-		case _IDOK, _IDYES:
+		case win.IDOK, win.IDYES:
 			dlg.usr = getWindowString(dlg.uEditCtl)
 			dlg.pwd = getWindowString(dlg.pEditCtl)
-		case _IDCANCEL:
+		case win.IDCANCEL:
 			dlg.err = ErrCanceled
-		case _IDNO:
+		case win.IDNO:
 			dlg.err = ErrExtraButton
 		}
 		destroyWindow.Call(wnd)

util_unix.go

@@ -98,6 +98,8 @@ func pwdResult(sep string, opts options, out []byte, err error) (string, string,
 	return "", str, err
 }
 
+func hwnd(i uint64) uintptr { return uintptr(i) }
+
 // Replace with strings.Cut after 1.18.
 func cut(s, sep string) (before, after string, found bool) {
 	if i := strings.Index(s, sep); i >= 0 {

util_windows.go

@@ -17,16 +17,11 @@ import (
 )
 
 var (
-	gdi32    = windows.NewLazySystemDLL("gdi32.dll")
 	kernel32 = windows.NewLazySystemDLL("kernel32.dll")
 	ntdll    = windows.NewLazySystemDLL("ntdll.dll")
 	user32   = windows.NewLazySystemDLL("user32.dll")
 	wtsapi32 = windows.NewLazySystemDLL("wtsapi32.dll")
 
-	createFontIndirect = gdi32.NewProc("CreateFontIndirectW")
-	deleteObject       = gdi32.NewProc("DeleteObject")
-	getDeviceCaps      = gdi32.NewProc("GetDeviceCaps")
-
 	activateActCtx     = kernel32.NewProc("ActivateActCtx")
 	createActCtx       = kernel32.NewProc("CreateActCtxW")
 	deactivateActCtx   = kernel32.NewProc("DeactivateActCtx")
@@ -82,6 +77,8 @@ func strptr(s string) uintptr {
 	return uintptr(unsafe.Pointer(syscall.StringToUTF16Ptr(s)))
 }
 
+func hwnd(i uint64) win.HWND { return win.HWND(uintptr(i)) }
+
 func setup() context.CancelFunc {
 	var wnd uintptr
 	enumWindows.Call(syscall.NewCallback(setupEnumCallback), uintptr(unsafe.Pointer(&wnd)))
@@ -264,7 +261,7 @@ func getDPI(wnd uintptr) dpi {
 	if wnd != 0 && getDpiForWindow.Find() == nil {
 		res, _, _ = getDpiForWindow.Call(wnd)
 	} else if dc, _, _ := getWindowDC.Call(wnd); dc != 0 {
-		res, _, _ = getDeviceCaps.Call(dc, 90) // LOGPIXELSY
+		res = win.GetDeviceCaps(win.Handle(dc), win.LOGPIXELSY)
 		releaseDC.Call(0, dc)
 	}
 
@@ -282,8 +279,8 @@ func (d dpi) scale(dim uintptr) uintptr {
 }
 
 type font struct {
-	handle  uintptr
+	handle  win.Handle
-	logical _LOGFONT
+	logical win.LOGFONT
 }
 
 func getFont() font {
@@ -298,14 +295,14 @@ func (f *font) forDPI(dpi dpi) uintptr {
 	if h := -int32(dpi.scale(12)); f.handle == 0 || f.logical.Height != h {
 		f.delete()
 		f.logical.Height = h
-		f.handle, _, _ = createFontIndirect.Call(uintptr(unsafe.Pointer(&f.logical)))
+		f.handle = win.CreateFontIndirect(&f.logical)
 	}
-	return f.handle
+	return uintptr(f.handle)
 }
 
 func (f *font) delete() {
 	if f.handle != 0 {
-		deleteObject.Call(f.handle)
+		win.DeleteObject(f.handle)
 		f.handle = 0
 	}
 }
@@ -470,24 +467,6 @@ type _CWPRETSTRUCT struct {
 	Wnd     uintptr
 }
 
-// https://docs.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-logfontw
-type _LOGFONT struct {
-	Height         int32
-	Width          int32
-	Escapement     int32
-	Orientation    int32
-	Weight         int32
-	Italic         byte
-	Underline      byte
-	StrikeOut      byte
-	CharSet        byte
-	OutPrecision   byte
-	ClipPrecision  byte
-	Quality        byte
-	PitchAndFamily byte
-	FaceName       [32]uint16
-}
-
 // https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-nonclientmetricsw
 type _NONCLIENTMETRICS struct {
 	Size            uint32
@@ -496,15 +475,15 @@ type _NONCLIENTMETRICS struct {
 	ScrollHeight    int32
 	CaptionWidth    int32
 	CaptionHeight   int32
-	CaptionFont     _LOGFONT
+	CaptionFont     win.LOGFONT
 	SmCaptionWidth  int32
 	SmCaptionHeight int32
-	SmCaptionFont   _LOGFONT
+	SmCaptionFont   win.LOGFONT
 	MenuWidth       int32
 	MenuHeight      int32
-	MenuFont        _LOGFONT
+	MenuFont        win.LOGFONT
-	StatusFont      _LOGFONT
+	StatusFont      win.LOGFONT
-	MessageFont     _LOGFONT
+	MessageFont     win.LOGFONT
 }
 
 // https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-msg

zenity.go

@@ -201,7 +201,7 @@ func Attach(id any) Option {
 	switch runtime.GOOS {
 	case "windows":
 		if v := reflect.ValueOf(id); v.Kind() == reflect.Uintptr {
-			id = uintptr(v.Uint())
+			id = hwnd(v.Uint())
 		} else {
 			panic("interface conversion: expected uintptr")
 		}