Refactor, docs.

color_windows.go

@@ -72,6 +72,7 @@ func selectColor(opts options) (color.Color, error) {
 	return color.RGBA{R: r, G: g, B: b, A: 255}, nil
 }
 
+// https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-choosecolorw-r1
 type _CHOOSECOLORW struct {
 	StructSize   uint32
 	Owner        uintptr

entry_windows.go

@@ -32,13 +32,11 @@ var (
 	createWindowExW       = user32.NewProc("CreateWindowExW")
 	defWindowProcW        = user32.NewProc("DefWindowProcW")
 	destroyWindowW        = user32.NewProc("DestroyWindow")
-	dispatchMessageW      = user32.NewProc("DispatchMessageW")
+	dispatchMessage       = user32.NewProc("DispatchMessageW")
-	getMessageW           = user32.NewProc("GetMessageW")
-	sendMessageW          = user32.NewProc("SendMessageW")
 	postQuitMessageW      = user32.NewProc("PostQuitMessage")
 	registerClassExW      = user32.NewProc("RegisterClassExW")
 	unregisterClassW      = user32.NewProc("UnregisterClassW")
-	translateMessageW     = user32.NewProc("TranslateMessage")
+	translateMessage      = user32.NewProc("TranslateMessage")
 	getWindowTextLengthW  = user32.NewProc("GetWindowTextLengthW")
 	getWindowTextW        = user32.NewProc("GetWindowTextW")
 	getWindowLongW        = user32.NewProc("GetWindowLongW")
@@ -47,7 +45,7 @@ var (
 	setWindowPosW         = user32.NewProc("SetWindowPos")
 	showWindowW           = user32.NewProc("ShowWindow")
 	updateWindowW         = user32.NewProc("UpdateWindow")
-	isDialogMessageW      = user32.NewProc("IsDialogMessageW")
+	isDialogMessage       = user32.NewProc("IsDialogMessageW")
 	getSystemMetricsW     = user32.NewProc("GetSystemMetrics")
 	systemParametersInfoW = user32.NewProc("SystemParametersInfoW")
 
@@ -121,14 +119,14 @@ type wndClassExW struct {
 	iconSm     syscall.Handle
 }
 
-// msgW https://msdn.microsoft.com/en-us/library/windows/desktop/ms644958.aspx
+// https://docs.microsoft.com/en-ie/windows/win32/api/winuser/ns-winuser-msg
-type msgW struct {
+type _MSG struct {
-	hwnd    syscall.Handle
+	Owner   syscall.Handle
-	message uint32
+	Message uint32
-	wParam  uintptr
+	WParam  uintptr
-	lParam  uintptr
+	LParam  uintptr
-	time    uint32
+	Time    uint32
-	pt      pointW
+	Pt      _POINT
 }
 
 // nonClientMetricsW https://msdn.microsoft.com/en-us/library/windows/desktop/ff729175.aspx
@@ -168,11 +166,13 @@ type logfontW struct {
 	lfFaceName       [32]uint16
 }
 
-type pointW struct {
+// https://docs.microsoft.com/en-us/windows/win32/api/windef/ns-windef-point
+type _POINT struct {
 	x, y int32
 }
 
-type rectW struct {
+// https://docs.microsoft.com/en-us/windows/win32/api/windef/ns-windef-rect
+type _RECT struct {
 	left   int32
 	top    int32
 	right  int32
@@ -231,33 +231,10 @@ func unregisterClass(className string, instance syscall.Handle) bool {
 	return ret != 0
 }
 
-func getMessage(msg *msgW, hwnd syscall.Handle, msgFilterMin, msgFilterMax uint32) (bool, error) {
-	ret, _, err := getMessageW.Call(uintptr(unsafe.Pointer(msg)), uintptr(hwnd), uintptr(msgFilterMin), uintptr(msgFilterMax))
-
-	if int32(ret) == -1 {
-		return false, err
-	}
-
-	return int32(ret) != 0, nil
-}
-
-func _sendMessage(hwnd syscall.Handle, msg uint32, wparam, lparam uintptr) uintptr {
-	ret, _, _ := sendMessageW.Call(uintptr(hwnd), uintptr(msg), wparam, lparam, 0, 0)
-	return ret
-}
-
-func dispatchMessage(msg *msgW) {
-	dispatchMessageW.Call(uintptr(unsafe.Pointer(msg)))
-}
-
 func postQuitMessage(exitCode int32) {
 	postQuitMessageW.Call(uintptr(exitCode))
 }
 
-func translateMessage(msg *msgW) {
-	translateMessageW.Call(uintptr(unsafe.Pointer(msg)))
-}
-
 func getWindowTextLength(hwnd syscall.Handle) int {
 	ret, _, _ := getWindowTextLengthW.Call(uintptr(hwnd))
 	return int(ret)
@@ -292,7 +269,7 @@ func setWindowLong(hwnd syscall.Handle, index, value int32) int32 {
 	return int32(ret)
 }
 
-func getWindowRect(hwnd syscall.Handle, rect *rectW) bool {
+func getWindowRect(hwnd syscall.Handle, rect *_RECT) bool {
 	ret, _, _ := getWindowRectW.Call(uintptr(hwnd), uintptr(unsafe.Pointer(rect)), 0)
 	return ret != 0
 }
@@ -313,18 +290,13 @@ func updateWindow(hwnd syscall.Handle) bool {
 	return ret != 0
 }
 
-func isDialogMessage(hwnd syscall.Handle, msg *msgW) bool {
-	ret, _, _ := isDialogMessageW.Call(uintptr(hwnd), uintptr(unsafe.Pointer(msg)), 0)
-	return ret != 0
-}
-
 func getSystemMetrics(nindex int32) int32 {
 	ret, _, _ := getSystemMetricsW.Call(uintptr(nindex), 0, 0)
 	return int32(ret)
 }
 
 func centerWindow(hwnd syscall.Handle) {
-	var rc rectW
+	var rc _RECT
 	getWindowRect(hwnd, &rc)
 	xPos := (getSystemMetrics(smCxScreen) - (rc.right - rc.left)) / 2
 	yPos := (getSystemMetrics(smCyScreen) - (rc.bottom - rc.top)) / 2
@@ -350,25 +322,24 @@ func registerClass(className string, instance syscall.Handle, fn interface{}) er
 	return err
 }
 
-func messageLoop(hwnd syscall.Handle) error {
+// https://docs.microsoft.com/en-us/windows/win32/winmsg/using-messages-and-message-queues
+func messageLoop(hwnd uintptr) error {
 	for {
-		msg := msgW{}
+		var msg _MSG
-		gotMessage, err := getMessage(&msg, 0, 0, 0)
+		ret, _, err := getMessage.Call(uintptr(unsafe.Pointer(&msg)), 0, 0, 0)
-		if err != nil {
+		if int32(ret) == -1 {
 			return err
 		}
+		if ret == 0 {
+			return nil
+		}
 
-		if gotMessage {
+		ret, _, _ = isDialogMessage.Call(hwnd, uintptr(unsafe.Pointer(&msg)), 0)
-			if !isDialogMessage(hwnd, &msg) {
+		if ret == 0 {
-				translateMessage(&msg)
+			translateMessage.Call(uintptr(unsafe.Pointer(&msg)))
-				dispatchMessage(&msg)
+			dispatchMessage.Call(uintptr(unsafe.Pointer(&msg)))
-			}
-		} else {
-			break
 		}
 	}
-
-	return nil
 }
 
 // editBox displays textedit/inputbox dialog.
@@ -433,17 +404,17 @@ func editBox(title, text, defaultText, className string, password bool) (string,
 	setWindowLong(hwnd, gwlStyle, getWindowLong(hwnd, gwlStyle)^wsMaximizeBox)
 
 	font := getMessageFont()
-	_sendMessage(hwndText, wmSetFont, font, 0)
+	sendMessage.Call(uintptr(hwndText), wmSetFont, font, 0)
-	_sendMessage(hwndEdit, wmSetFont, font, 0)
+	sendMessage.Call(uintptr(hwndEdit), wmSetFont, font, 0)
-	_sendMessage(hwndOK, wmSetFont, font, 0)
+	sendMessage.Call(uintptr(hwndOK), wmSetFont, font, 0)
-	_sendMessage(hwndCancel, wmSetFont, font, 0)
+	sendMessage.Call(uintptr(hwndCancel), wmSetFont, font, 0)
 
 	centerWindow(hwnd)
 
 	showWindow(hwnd, swShowNormal)
 	updateWindow(hwnd)
 
-	err = messageLoop(hwnd)
+	err = messageLoop(uintptr(hwnd))
 	if err != nil {
 		return out, false, err
 	}

file_windows.go

@@ -208,10 +208,10 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 	if int32(hr) < 0 {
 		return browseForFolder(opts)
 	}
-	defer dialog.Call(dialog.vtbl.Release)
+	defer dialog.Call(dialog.Release)
 
 	var flgs int
-	hr, _, _ = dialog.Call(dialog.vtbl.GetOptions, uintptr(unsafe.Pointer(&flgs)))
+	hr, _, _ = dialog.Call(dialog.GetOptions, uintptr(unsafe.Pointer(&flgs)))
 	if int32(hr) < 0 {
 		return "", nil, syscall.Errno(hr)
 	}
@@ -221,14 +221,14 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 	if opts.showHidden {
 		flgs |= 0x10000000 // FOS_FORCESHOWHIDDEN
 	}
-	hr, _, _ = dialog.Call(dialog.vtbl.SetOptions, uintptr(flgs|0x68)) // FOS_NOCHANGEDIR|FOS_PICKFOLDERS|FOS_FORCEFILESYSTEM
+	hr, _, _ = dialog.Call(dialog.SetOptions, uintptr(flgs|0x68)) // FOS_NOCHANGEDIR|FOS_PICKFOLDERS|FOS_FORCEFILESYSTEM
 	if int32(hr) < 0 {
 		return "", nil, syscall.Errno(hr)
 	}
 
 	if opts.title != nil {
 		ptr := syscall.StringToUTF16Ptr(*opts.title)
-		dialog.Call(dialog.vtbl.SetTitle, uintptr(unsafe.Pointer(ptr)))
+		dialog.Call(dialog.SetTitle, uintptr(unsafe.Pointer(ptr)))
 	}
 
 	if opts.filename != "" {
@@ -240,8 +240,8 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 			uintptr(unsafe.Pointer(&item)))
 
 		if int32(hr) >= 0 && item != nil {
-			dialog.Call(dialog.vtbl.SetFolder, uintptr(unsafe.Pointer(item)))
+			dialog.Call(dialog.SetFolder, uintptr(unsafe.Pointer(item)))
-			item.Call(item.vtbl.Release)
+			item.Call(item.Release)
 		}
 	}
 
@@ -254,7 +254,7 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 	}
 
 	activate()
-	hr, _, _ = dialog.Call(dialog.vtbl.Show, 0)
+	hr, _, _ = dialog.Call(dialog.Show, 0)
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", nil, opts.ctx.Err()
 	}
@@ -271,10 +271,10 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 		if int32(hr) < 0 {
 			return syscall.Errno(hr)
 		}
-		defer item.Call(item.vtbl.Release)
+		defer item.Call(item.Release)
 
 		var ptr uintptr
-		hr, _, _ = item.Call(item.vtbl.GetDisplayName,
+		hr, _, _ = item.Call(item.GetDisplayName,
 			0x80058000, // SIGDN_FILESYSPATH
 			uintptr(unsafe.Pointer(&ptr)))
 		if int32(hr) < 0 {
@@ -292,22 +292,22 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 
 	if multi {
 		var items *_IShellItemArray
-		hr, _, _ = dialog.Call(dialog.vtbl.GetResults, uintptr(unsafe.Pointer(&items)))
+		hr, _, _ = dialog.Call(dialog.GetResults, uintptr(unsafe.Pointer(&items)))
 		if int32(hr) < 0 {
 			return "", nil, syscall.Errno(hr)
 		}
-		defer items.Call(items.vtbl.Release)
+		defer items.Call(items.Release)
 
 		var count uint32
-		hr, _, _ = items.Call(items.vtbl.GetCount, uintptr(unsafe.Pointer(&count)))
+		hr, _, _ = items.Call(items.GetCount, uintptr(unsafe.Pointer(&count)))
 		if int32(hr) < 0 {
 			return "", nil, syscall.Errno(hr)
 		}
 		for i := uintptr(0); i < uintptr(count) && err == nil; i++ {
-			err = shellItemPath(&items._COMObject, items.vtbl.GetItemAt, i)
+			err = shellItemPath(&items._COMObject, items.GetItemAt, i)
 		}
 	} else {
-		err = shellItemPath(&dialog._COMObject, dialog.vtbl.GetResult)
+		err = shellItemPath(&dialog._COMObject, dialog.GetResult)
 	}
 	return
 }
@@ -387,6 +387,7 @@ func initFilters(filters []FileFilter) []uint16 {
 	return res
 }
 
+// https://docs.microsoft.com/en-us/windows/win32/api/commdlg/ns-commdlg-openfilenamew
 type _OPENFILENAME struct {
 	StructSize      uint32
 	Owner           uintptr
@@ -413,6 +414,7 @@ type _OPENFILENAME struct {
 	FlagsEx         uint32
 }
 
+// https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/ns-shlobj_core-browseinfow
 type _BROWSEINFO struct {
 	Owner        uintptr
 	Root         uintptr
@@ -424,9 +426,7 @@ type _BROWSEINFO struct {
 	Image        int32
 }
 
-func uuid(s string) uintptr {
+// https://github.com/wine-mirror/wine/blob/master/include/shobjidl.idl
-	return (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
-}
 
 var (
 	_IID_IShellItem       = uuid("\x1e\x6d\x82\x43\x18\xe7\xee\x42\xbc\x55\xa1\xe2\x61\xc3\x7b\xfe")
@@ -436,17 +436,17 @@ var (
 
 type _IFileOpenDialog struct {
 	_COMObject
-	vtbl *_IFileOpenDialogVtbl
+	*_IFileOpenDialogVtbl
 }
 
 type _IShellItem struct {
 	_COMObject
-	vtbl *_IShellItemVtbl
+	*_IShellItemVtbl
 }
 
 type _IShellItemArray struct {
 	_COMObject
-	vtbl *_IShellItemArrayVtbl
+	*_IShellItemArrayVtbl
 }
 
 type _IFileOpenDialogVtbl struct {

notify_windows.go

@@ -97,20 +97,21 @@ func wtsMessage(text string, opts options) error {
 	return nil
 }
 
+// https://docs.microsoft.com/en-us/windows/win32/api/shellapi/ns-shellapi-notifyicondataw
 type _NOTIFYICONDATA struct {
 	StructSize      uint32
-	Owner           uintptr
+	Wnd             uintptr
 	ID              uint32
 	Flags           uint32
 	CallbackMessage uint32
 	Icon            uintptr
-	Tip             [128]uint16
+	Tip             [128]uint16 // NOTIFYICONDATAA_V1_SIZE
 	State           uint32
 	StateMask       uint32
 	Info            [256]uint16
 	Version         uint32
 	InfoTitle       [64]uint16
 	InfoFlags       uint32
-	// GuidItem     [16]byte
+	// GuidItem     [16]byte       // NOTIFYICONDATAA_V2_SIZE
-	// BalloonIcon  uintptr
+	// BalloonIcon  syscall.Handle // NOTIFYICONDATAA_V3_SIZE
 }

util_windows.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"reflect"
 	"sync"
 	"syscall"
 	"unsafe"
@@ -27,6 +28,7 @@ var (
 	coCreateInstance = ole32.NewProc("CoCreateInstance")
 	coTaskMemFree    = ole32.NewProc("CoTaskMemFree")
 
+	getMessage               = user32.NewProc("GetMessageW")
 	sendMessage              = user32.NewProc("SendMessageW")
 	getClassName             = user32.NewProc("GetClassNameW")
 	setWindowsHookEx         = user32.NewProc("SetWindowsHookExW")
@@ -68,6 +70,7 @@ func commDlgError() error {
 	}
 }
 
+// https://docs.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-cwpretstruct
 type _CWPRETSTRUCT struct {
 	Result  uintptr
 	LParam  uintptr
@@ -149,6 +152,18 @@ func hookDialogTitle(ctx context.Context, title *string) (unhook context.CancelF
 	return hookDialog(ctx, init)
 }
 
+// https://github.com/wine-mirror/wine/blob/master/include/unknwn.idl
+
+type _IUnknownVtbl struct {
+	QueryInterface uintptr
+	AddRef         uintptr
+	Release        uintptr
+}
+
+func uuid(s string) uintptr {
+	return (*reflect.StringHeader)(unsafe.Pointer(&s)).Data
+}
+
 type _COMObject struct{}
 
 func (o *_COMObject) Call(trap uintptr, a ...uintptr) (r1, r2 uintptr, lastErr error) {
@@ -165,9 +180,3 @@ func (o *_COMObject) Call(trap uintptr, a ...uintptr) (r1, r2 uintptr, lastErr e
 		panic("COM call with too many arguments.")
 	}
 }
-
-type _IUnknownVtbl struct {
-	QueryInterface uintptr
-	AddRef         uintptr
-	Release        uintptr
-}