DPI awareness improvements (windows).

color_windows.go

@@ -2,7 +2,6 @@ package zenity
 
 import (
 	"image/color"
-	"runtime"
 	"sync"
 	"unsafe"
 )
@@ -41,8 +40,7 @@ func selectColor(opts options) (color.Color, error) {
 		args.Flags |= 0x2 // CC_FULLOPEN
 	}
 
-	runtime.LockOSThread()
+	defer setup()()
-	defer runtime.UnlockOSThread()
 
 	if opts.ctx != nil || opts.title != nil {
 		unhook, err := hookDialogTitle(opts.ctx, opts.title)
@@ -52,7 +50,6 @@ func selectColor(opts options) (color.Color, error) {
 		defer unhook()
 	}
 
-	activate()
 	s, _, _ := chooseColor.Call(uintptr(unsafe.Pointer(&args)))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return nil, opts.ctx.Err()

file_windows.go

@@ -3,7 +3,6 @@ package zenity
 import (
 	"path/filepath"
 	"reflect"
-	"runtime"
 	"syscall"
 	"unicode/utf16"
 	"unsafe"
@@ -42,8 +41,7 @@ func selectFile(opts options) (string, error) {
 	args.MaxFile = uint32(len(res))
 	args.InitialDir, args.DefExt = initDirNameExt(opts.filename, res[:])
 
-	runtime.LockOSThread()
+	defer setup()()
-	defer runtime.UnlockOSThread()
 
 	if opts.ctx != nil {
 		unhook, err := hookDialog(opts.ctx, nil)
@@ -53,7 +51,6 @@ func selectFile(opts options) (string, error) {
 		defer unhook()
 	}
 
-	activate()
 	s, _, _ := getOpenFileName.Call(uintptr(unsafe.Pointer(&args)))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", opts.ctx.Err()
@@ -89,8 +86,7 @@ func selectFileMutiple(opts options) ([]string, error) {
 	args.MaxFile = uint32(len(res))
 	args.InitialDir, args.DefExt = initDirNameExt(opts.filename, res[:])
 
-	runtime.LockOSThread()
+	defer setup()()
-	defer runtime.UnlockOSThread()
 
 	if opts.ctx != nil {
 		unhook, err := hookDialog(opts.ctx, nil)
@@ -100,7 +96,6 @@ func selectFileMutiple(opts options) ([]string, error) {
 		defer unhook()
 	}
 
-	activate()
 	s, _, _ := getOpenFileName.Call(uintptr(unsafe.Pointer(&args)))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return nil, opts.ctx.Err()
@@ -167,8 +162,7 @@ func selectFileSave(opts options) (string, error) {
 	args.MaxFile = uint32(len(res))
 	args.InitialDir, args.DefExt = initDirNameExt(opts.filename, res[:])
 
-	runtime.LockOSThread()
+	defer setup()()
-	defer runtime.UnlockOSThread()
 
 	if opts.ctx != nil {
 		unhook, err := hookDialog(opts.ctx, nil)
@@ -178,7 +172,6 @@ func selectFileSave(opts options) (string, error) {
 		defer unhook()
 	}
 
-	activate()
 	s, _, _ := getSaveFileName.Call(uintptr(unsafe.Pointer(&args)))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", opts.ctx.Err()
@@ -190,8 +183,7 @@ func selectFileSave(opts options) (string, error) {
 }
 
 func pickFolders(opts options, multi bool) (str string, lst []string, err error) {
-	runtime.LockOSThread()
+	defer setup()()
-	defer runtime.UnlockOSThread()
 
 	hr, _, _ := coInitializeEx.Call(0, 0x6) // COINIT_APARTMENTTHREADED|COINIT_DISABLE_OLE1DDE
 	if hr != 0x80010106 {                   // RPC_E_CHANGED_MODE
@@ -253,7 +245,6 @@ func pickFolders(opts options, multi bool) (str string, lst []string, err error)
 		defer unhook()
 	}
 
-	activate()
 	hr, _, _ = dialog.Call(dialog.Show, 0)
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", nil, opts.ctx.Err()
@@ -338,7 +329,6 @@ func browseForFolder(opts options) (string, []string, error) {
 		defer unhook()
 	}
 
-	activate()
 	ptr, _, _ := shBrowseForFolder.Call(uintptr(unsafe.Pointer(&args)))
 	if opts.ctx != nil && opts.ctx.Err() != nil {
 		return "", nil, opts.ctx.Err()

go.mod

@@ -5,9 +5,9 @@ go 1.15
 require (
 	github.com/dchest/jsmin v0.0.0-20160823214000-faeced883947 // indirect
 	github.com/josephspurrier/goversioninfo v1.2.0 // indirect
-	github.com/stretchr/testify v1.6.1 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
-	go.uber.org/goleak v1.0.0 // test
+	go.uber.org/goleak v1.1.10 // test
-	golang.org/x/image v0.0.0-20201208152932-35266b937fa6
+	golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb
-	golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f // indirect
+	golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5 // indirect
 	golang.org/x/tools v0.1.0 // indirect
 )

go.sum

@@ -13,21 +13,31 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 go.uber.org/goleak v1.0.0 h1:qsup4IcBdlmsnGfqyLl4Ntn3C2XCCuKAE7DwHpScyUo=
 go.uber.org/goleak v1.0.0/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
+go.uber.org/goleak v1.1.10 h1:z+mqJhf6ss6BSfSM671tgKyZBFPTTJM+HLxnhPC3wu0=
+go.uber.org/goleak v1.1.10/go.mod h1:8a7PlsEVH3e/a/GLqe5IIrQx6GzcnRmZEufDUTk4A7A=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/image v0.0.0-20201208152932-35266b937fa6 h1:nfeHNc1nAqecKCy2FCy4HY+soOOe5sDLJ/gZLbx6GYI=
 golang.org/x/image v0.0.0-20201208152932-35266b937fa6/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
+golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb h1:fqpd0EBDzlHRCjiphRR5Zo/RSWWQlWv34418dnEixWk=
+golang.org/x/image v0.0.0-20210220032944-ac19c3e999fb/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f h1:J5lckAjkw6qYlOZNj90mLYNTEKDvWeuc1yieZ8qUzUE=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
+golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5 h1:2M3HP5CCK1Si9FQhwnzYhXdG6DXeebvUHFpre8QvbyI=
+golang.org/x/lint v0.0.0-20201208152925-83fdc39ff7b5/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
+golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
@@ -48,6 +58,7 @@ golang.org/x/tools v0.0.0-20190311212946-11955173bddd/go.mod h1:LCzVGOaR6xXOjkQ3
 golang.org/x/tools v0.0.0-20191108193012-7d206e10da11/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/tools v0.0.0-20200130002326-2f3ba24bd6e7/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
 golang.org/x/tools v0.1.0 h1:po9/4sTYwZU9lPhi1tOrb4hCv3qrhiQ77LZfGa2OjwY=
 golang.org/x/tools v0.1.0/go.mod h1:xkSsbof2nBLbhDlRMhhhyNLN/zl3eTqcnHD5viDpcZ0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

msg_windows.go

@@ -2,7 +2,6 @@ package zenity
 
 import (
 	"context"
-	"runtime"
 	"syscall"
 	"unsafe"
 )
@@ -42,10 +41,9 @@ func message(kind messageKind, text string, opts options) (bool, error) {
 		}
 	}
 
-	if opts.ctx != nil || opts.okLabel != nil || opts.cancelLabel != nil || opts.extraButton != nil {
+	defer setup()()
-		runtime.LockOSThread()
-		defer runtime.UnlockOSThread()
 
+	if opts.ctx != nil || opts.okLabel != nil || opts.cancelLabel != nil || opts.extraButton != nil {
 		unhook, err := hookMessageLabels(kind, opts)
 		if err != nil {
 			return false, err

util_windows.go

@@ -5,7 +5,8 @@ import (
 	"fmt"
 	"os"
 	"reflect"
-	"sync"
+	"runtime"
+	"sync/atomic"
 	"syscall"
 	"unsafe"
 )
@@ -40,9 +41,10 @@ var (
 	setWindowText                = user32.NewProc("SetWindowTextW")
 	setForegroundWindow          = user32.NewProc("SetForegroundWindow")
 	getWindowThreadProcessId     = user32.NewProc("GetWindowThreadProcessId")
+	setThreadDpiAwarenessContext = user32.NewProc("SetThreadDpiAwarenessContext")
 )
 
-func activate() {
+func setup() context.CancelFunc {
 	var hwnd uintptr
 	enumWindows.Call(syscall.NewCallback(func(wnd, lparam uintptr) uintptr {
 		var pid uintptr
@@ -59,6 +61,28 @@ func activate() {
 	if hwnd != 0 {
 		setForegroundWindow.Call(hwnd)
 	}
+
+	var old uintptr
+	runtime.LockOSThread()
+	if setThreadDpiAwarenessContext.Find() == nil {
+		// try:
+		//   DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
+		//   DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE
+		//   DPI_AWARENESS_CONTEXT_SYSTEM_AWARE
+		for i := -4; i <= -2; i++ {
+			restore, _, _ := setThreadDpiAwarenessContext.Call(uintptr(i))
+			if restore != 0 {
+				break
+			}
+		}
+	}
+
+	return func() {
+		if old != 0 {
+			setThreadDpiAwarenessContext.Call(old)
+			runtime.UnlockOSThread()
+		}
+	}
 }
 
 func commDlgError() error {
@@ -84,7 +108,6 @@ func hookDialog(ctx context.Context, initDialog func(wnd uintptr)) (unhook conte
 		return nil, ctx.Err()
 	}
 
-	var mtx sync.Mutex
 	var hook, wnd uintptr
 	tid, _, _ := getCurrentThreadId.Call()
 	hook, _, err = setWindowsHookEx.Call(12, // WH_CALLWNDPROCRET
@@ -95,13 +118,11 @@ func hookDialog(ctx context.Context, initDialog func(wnd uintptr)) (unhook conte
 				if syscall.UTF16ToString(name[:]) == "#32770" { // The class for a dialog box
 					var close bool
 
-					mtx.Lock()
 					if ctx != nil && ctx.Err() != nil {
 						close = true
 					} else {
-						wnd = lparam.Wnd
+						atomic.StoreUintptr(&wnd, lparam.Wnd)
 					}
-					mtx.Unlock()
 
 					if close {
 						sendMessage.Call(lparam.Wnd, 0x0112 /* WM_SYSCOMMAND */, 0xf060 /* SC_CLOSE */, 0)
@@ -125,11 +146,7 @@ func hookDialog(ctx context.Context, initDialog func(wnd uintptr)) (unhook conte
 	go func() {
 		select {
 		case <-ctx.Done():
-			mtx.Lock()
+			if w := atomic.LoadUintptr(&wnd); w != 0 {
-			w := wnd
-			mtx.Unlock()
-
-			if w != 0 {
 				sendMessage.Call(w, 0x0112 /* WM_SYSCOMMAND */, 0xf060 /* SC_CLOSE */, 0)
 			}
 		case <-wait: