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2faf8533e0
wails/v3/pkg/application/webview_window_windows.go
Lea Anthony 2faf8533e0
Dark theme menus for windows
2025-02-09 21:59:50 +11:00

2079 lines
60 KiB
Go
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//go:build windows
package application
import (
"errors"
"fmt"
"net/url"
"strconv"
"strings"
"sync"
"sync/atomic"
"syscall"
"time"
"unsafe"
"github.com/bep/debounce"
"github.com/wailsapp/go-webview2/webviewloader"
"github.com/wailsapp/wails/v3/internal/assetserver"
"github.com/wailsapp/wails/v3/internal/assetserver/webview"
"github.com/wailsapp/wails/v3/internal/capabilities"
"github.com/wailsapp/wails/v3/internal/runtime"
"github.com/samber/lo"
"github.com/wailsapp/go-webview2/pkg/edge"
"github.com/wailsapp/wails/v3/pkg/events"
"github.com/wailsapp/wails/v3/pkg/w32"
)
var edgeMap = map[string]uintptr{
"n-resize": w32.HTTOP,
"ne-resize": w32.HTTOPRIGHT,
"e-resize": w32.HTRIGHT,
"se-resize": w32.HTBOTTOMRIGHT,
"s-resize": w32.HTBOTTOM,
"sw-resize": w32.HTBOTTOMLEFT,
"w-resize": w32.HTLEFT,
"nw-resize": w32.HTTOPLEFT,
}
type windowsWebviewWindow struct {
windowImpl unsafe.Pointer
parent *WebviewWindow
hwnd w32.HWND
menu *Win32Menu
currentlyOpenContextMenu *Win32Menu
ignoreDPIChangeResizing bool
// Fullscreen flags
isCurrentlyFullscreen bool
previousWindowStyle uint32
previousWindowExStyle uint32
previousWindowPlacement w32.WINDOWPLACEMENT
// Webview
chromium *edge.Chromium
webviewNavigationCompleted bool
// resizeBorder* is the width/height of the resize border in pixels.
resizeBorderWidth int32
resizeBorderHeight int32
focusingChromium bool
dropTarget *w32.DropTarget
onceDo sync.Once
// Window move debouncer
moveDebouncer func(func())
resizeDebouncer func(func())
// isMinimizing indicates whether the window is currently being minimized
// Used to prevent unnecessary redraws during minimize/restore operations
isMinimizing bool
}
func (w *windowsWebviewWindow) setMenu(menu *Menu) {
menu.Update()
w.menu = NewApplicationMenu(w, menu)
w.menu.parentWindow = w
w32.SetMenu(w.hwnd, w.menu.menu)
}
func (w *windowsWebviewWindow) cut() {
w.execJS("document.execCommand('cut')")
}
func (w *windowsWebviewWindow) paste() {
w.execJS(`
(async () => {
try {
// Try to read all available formats
const clipboardItems = await navigator.clipboard.read();
for (const clipboardItem of clipboardItems) {
// Check for image types
for (const type of clipboardItem.types) {
if (type.startsWith('image/')) {
const blob = await clipboardItem.getType(type);
const url = URL.createObjectURL(blob);
document.execCommand('insertHTML', false, '<img src="' + url + '">');
return;
}
}
// If no image found, try text
if (clipboardItem.types.includes('text/plain')) {
const text = await navigator.clipboard.readText();
document.execCommand('insertText', false, text);
return;
}
}
} catch(err) {
// Fallback to text-only paste if clipboard access fails
try {
const text = await navigator.clipboard.readText();
document.execCommand('insertText', false, text);
} catch(fallbackErr) {
console.error('Failed to paste:', err, fallbackErr);
}
}
})()
`)
}
func (w *windowsWebviewWindow) copy() {
w.execJS(`
(async () => {
try {
const selection = window.getSelection();
if (!selection.rangeCount) return;
const range = selection.getRangeAt(0);
const container = document.createElement('div');
container.appendChild(range.cloneContents());
// Check if we have any images in the selection
const images = container.getElementsByTagName('img');
if (images.length > 0) {
// Handle image copy
const img = images[0]; // Take the first image
const response = await fetch(img.src);
const blob = await response.blob();
await navigator.clipboard.write([
new ClipboardItem({
[blob.type]: blob
})
]);
} else {
// Handle text copy
const text = selection.toString();
if (text) {
await navigator.clipboard.writeText(text);
}
}
} catch(err) {
console.error('Failed to copy:', err);
}
})()
`)
}
func (w *windowsWebviewWindow) selectAll() {
w.execJS("document.execCommand('selectAll')")
}
func (w *windowsWebviewWindow) undo() {
w.execJS("document.execCommand('undo')")
}
func (w *windowsWebviewWindow) redo() {
w.execJS("document.execCommand('redo')")
}
func (w *windowsWebviewWindow) delete() {
w.execJS("document.execCommand('delete')")
}
func (w *windowsWebviewWindow) handleKeyEvent(_ string) {
// Unused on windows
}
func (w *windowsWebviewWindow) setEnabled(enabled bool) {
w32.EnableWindow(w.hwnd, enabled)
}
func (w *windowsWebviewWindow) print() error {
w.execJS("window.print();")
return nil
}
func (w *windowsWebviewWindow) startResize(border string) error {
if !w32.ReleaseCapture() {
return fmt.Errorf("unable to release mouse capture")
}
// Use PostMessage because we don't want to block the caller until resizing has been finished.
w32.PostMessage(w.hwnd, w32.WM_NCLBUTTONDOWN, edgeMap[border], 0)
return nil
}
func (w *windowsWebviewWindow) startDrag() error {
if !w32.ReleaseCapture() {
return fmt.Errorf("unable to release mouse capture")
}
// Use PostMessage because we don't want to block the caller until dragging has been finished.
w32.PostMessage(w.hwnd, w32.WM_NCLBUTTONDOWN, w32.HTCAPTION, 0)
return nil
}
func (w *windowsWebviewWindow) nativeWindowHandle() uintptr {
return w.hwnd
}
func (w *windowsWebviewWindow) setTitle(title string) {
w32.SetWindowText(w.hwnd, title)
}
func (w *windowsWebviewWindow) setAlwaysOnTop(alwaysOnTop bool) {
w32.SetWindowPos(w.hwnd,
lo.Ternary(alwaysOnTop, w32.HWND_TOPMOST, w32.HWND_NOTOPMOST),
0,
0,
0,
0,
uint(w32.SWP_NOMOVE|w32.SWP_NOSIZE))
}
func (w *windowsWebviewWindow) setURL(url string) {
// Navigate to the given URL in the webview
w.webviewNavigationCompleted = false
w.chromium.Navigate(url)
}
func (w *windowsWebviewWindow) setResizable(resizable bool) {
w.setStyle(resizable, w32.WS_THICKFRAME)
w.execJS(fmt.Sprintf("window._wails.setResizable(%v);", resizable))
}
func (w *windowsWebviewWindow) setMinSize(width, height int) {
w.parent.options.MinWidth = width
w.parent.options.MinHeight = height
}
func (w *windowsWebviewWindow) setMaxSize(width, height int) {
w.parent.options.MaxWidth = width
w.parent.options.MaxHeight = height
}
func (w *windowsWebviewWindow) execJS(js string) {
if w.chromium == nil {
return
}
globalApplication.dispatchOnMainThread(func() {
w.chromium.Eval(js)
})
}
func (w *windowsWebviewWindow) setBackgroundColour(color RGBA) {
w32.SetBackgroundColour(w.hwnd, color.Red, color.Green, color.Blue)
}
func (w *windowsWebviewWindow) framelessWithDecorations() bool {
return w.parent.options.Frameless && !w.parent.options.Windows.DisableFramelessWindowDecorations
}
func (w *windowsWebviewWindow) run() {
options := w.parent.options
w.chromium = edge.NewChromium()
if globalApplication.options.ErrorHandler != nil {
w.chromium.SetErrorCallback(globalApplication.options.ErrorHandler)
}
exStyle := w32.WS_EX_CONTROLPARENT
if options.BackgroundType != BackgroundTypeSolid {
exStyle |= w32.WS_EX_NOREDIRECTIONBITMAP
if w.parent.options.IgnoreMouseEvents {
exStyle |= w32.WS_EX_TRANSPARENT | w32.WS_EX_LAYERED
}
}
if options.AlwaysOnTop {
exStyle |= w32.WS_EX_TOPMOST
}
// If we're frameless, we need to add the WS_EX_TOOLWINDOW style to hide the window from the taskbar
if options.Windows.HiddenOnTaskbar {
//exStyle |= w32.WS_EX_TOOLWINDOW
exStyle |= w32.WS_EX_NOACTIVATE
} else {
exStyle |= w32.WS_EX_APPWINDOW
}
if options.Windows.ExStyle != 0 {
exStyle = options.Windows.ExStyle
}
bounds := Rect{
X: options.X,
Y: options.Y,
Width: options.Width,
Height: options.Height,
}
initialScreen := ScreenNearestDipRect(bounds)
physicalBounds := initialScreen.dipToPhysicalRect(bounds)
// Default window position applied by the system
// TODO: provide a way to set (0,0) as an initial position?
if options.X == 0 && options.Y == 0 {
physicalBounds.X = w32.CW_USEDEFAULT
physicalBounds.Y = w32.CW_USEDEFAULT
}
var appMenu w32.HMENU
// Process Menu
if !options.Frameless {
userMenu := w.parent.options.Windows.Menu
if userMenu != nil {
userMenu.Update()
w.menu = NewApplicationMenu(w, userMenu)
w.menu.parentWindow = w
appMenu = w.menu.menu
}
}
var parent w32.HWND
var style uint = w32.WS_OVERLAPPEDWINDOW
w.hwnd = w32.CreateWindowEx(
uint(exStyle),
w32.MustStringToUTF16Ptr(globalApplication.options.Windows.WndClass),
w32.MustStringToUTF16Ptr(options.Title),
style,
physicalBounds.X,
physicalBounds.Y,
physicalBounds.Width,
physicalBounds.Height,
parent,
appMenu,
w32.GetModuleHandle(""),
nil)
if w.hwnd == 0 {
globalApplication.fatal("Unable to create window")
}
// Ensure correct window size in case the scale factor of current screen is different from the initial one.
// This could happen when using the default window position and the window launches on a secondary monitor.
currentScreen, _ := w.getScreen()
if currentScreen.ScaleFactor != initialScreen.ScaleFactor {
w.setSize(options.Width, options.Height)
}
w.setupChromium()
if options.Windows.WindowDidMoveDebounceMS == 0 {
options.Windows.WindowDidMoveDebounceMS = 50
}
w.moveDebouncer = debounce.New(time.Duration(options.Windows.WindowDidMoveDebounceMS) * time.Millisecond)
if options.Windows.ResizeDebounceMS > 0 {
w.resizeDebouncer = debounce.New(time.Duration(options.Windows.ResizeDebounceMS) * time.Millisecond)
}
// Initialise the window buttons
w.setMinimiseButtonState(options.MinimiseButtonState)
w.setMaximiseButtonState(options.MaximiseButtonState)
w.setCloseButtonState(options.CloseButtonState)
// Register the window with the application
getNativeApplication().registerWindow(w)
w.setResizable(!options.DisableResize)
w.setIgnoreMouseEvents(options.IgnoreMouseEvents)
if options.Frameless {
// Inform the application of the frame change this is needed to trigger the WM_NCCALCSIZE event.
// => https://learn.microsoft.com/en-us/windows/win32/dwm/customframe#removing-the-standard-frame
// This is normally done in WM_CREATE but we can't handle that there because that is emitted during CreateWindowEx
// and at that time we can't yet register the window for calling our WndProc method.
// This must be called after setResizable above!
rcClient := w32.GetWindowRect(w.hwnd)
w32.SetWindowPos(w.hwnd,
0,
int(rcClient.Left),
int(rcClient.Top),
int(rcClient.Right-rcClient.Left),
int(rcClient.Bottom-rcClient.Top),
w32.SWP_FRAMECHANGED)
}
// Icon
if !options.Windows.DisableIcon {
// App icon ID is 3
icon, err := NewIconFromResource(w32.GetModuleHandle(""), uint16(3))
if err != nil {
// Try loading from the given icon
if globalApplication.options.Icon != nil {
icon, _ = w32.CreateLargeHIconFromImage(globalApplication.options.Icon)
}
}
if icon != 0 {
w.setIcon(icon)
}
} else {
w.disableIcon()
}
// Process the theme
w32.AllowDarkModeForWindow(w.hwnd, true)
switch options.Windows.Theme {
case SystemDefault:
w.updateTheme(w32.IsCurrentlyDarkMode())
w.parent.onApplicationEvent(events.Windows.SystemThemeChanged, func(*ApplicationEvent) {
InvokeAsync(func() {
w.updateTheme(w32.IsCurrentlyDarkMode())
})
})
case Light:
w.updateTheme(false)
case Dark:
w.updateTheme(true)
}
switch options.BackgroundType {
case BackgroundTypeSolid:
var col = options.BackgroundColour
w.setBackgroundColour(col)
w.chromium.SetBackgroundColour(col.Red, col.Green, col.Blue, col.Alpha)
case BackgroundTypeTransparent:
w.chromium.SetBackgroundColour(0, 0, 0, 0)
case BackgroundTypeTranslucent:
w.chromium.SetBackgroundColour(0, 0, 0, 0)
w.setBackdropType(options.Windows.BackdropType)
}
// Process StartState
switch options.StartState {
case WindowStateMaximised:
if w.parent.Resizable() {
w.maximise()
}
case WindowStateMinimised:
w.minimise()
case WindowStateFullscreen:
w.fullscreen()
case WindowStateNormal:
}
// Process window mask
if options.Windows.WindowMask != nil {
w.setWindowMask(options.Windows.WindowMask)
}
if options.InitialPosition == WindowCentered {
w.center()
} else {
w.setPosition(options.X, options.Y)
}
if options.Frameless {
// Trigger a resize to ensure the window is sized correctly
w.chromium.Resize()
}
}
func (w *windowsWebviewWindow) center() {
w32.CenterWindow(w.hwnd)
}
func (w *windowsWebviewWindow) disableSizeConstraints() {
w.setMaxSize(0, 0)
w.setMinSize(0, 0)
}
func (w *windowsWebviewWindow) enableSizeConstraints() {
options := w.parent.options
if options.MinWidth > 0 || options.MinHeight > 0 {
w.setMinSize(options.MinWidth, options.MinHeight)
}
if options.MaxWidth > 0 || options.MaxHeight > 0 {
w.setMaxSize(options.MaxWidth, options.MaxHeight)
}
}
func (w *windowsWebviewWindow) update() {
w32.UpdateWindow(w.hwnd)
}
// getBorderSizes returns the extended border size for the window
func (w *windowsWebviewWindow) getBorderSizes() *LRTB {
var result LRTB
var frame w32.RECT
w32.DwmGetWindowAttribute(w.hwnd, w32.DWMWA_EXTENDED_FRAME_BOUNDS, unsafe.Pointer(&frame), unsafe.Sizeof(frame))
rect := w32.GetWindowRect(w.hwnd)
result.Left = int(frame.Left - rect.Left)
result.Top = int(frame.Top - rect.Top)
result.Right = int(rect.Right - frame.Right)
result.Bottom = int(rect.Bottom - frame.Bottom)
return &result
}
func (w *windowsWebviewWindow) physicalBounds() Rect {
// var rect w32.RECT
// // Get the extended frame bounds instead of the window rect to offset the invisible borders in Windows 10
// w32.DwmGetWindowAttribute(w.hwnd, w32.DWMWA_EXTENDED_FRAME_BOUNDS, unsafe.Pointer(&rect), unsafe.Sizeof(rect))
rect := w32.GetWindowRect(w.hwnd)
return Rect{
X: int(rect.Left),
Y: int(rect.Top),
Width: int(rect.Right - rect.Left),
Height: int(rect.Bottom - rect.Top),
}
}
func (w *windowsWebviewWindow) setPhysicalBounds(physicalBounds Rect) {
// // Offset invisible borders
// borderSize := w.getBorderSizes()
// physicalBounds.X -= borderSize.Left
// physicalBounds.Y -= borderSize.Top
// physicalBounds.Width += borderSize.Left + borderSize.Right
// physicalBounds.Height += borderSize.Top + borderSize.Bottom
// Set flag to ignore resizing the window with DPI change because we already calculated the correct size
// for the target position, this prevents double resizing issue when the window is moved between screens
previousFlag := w.ignoreDPIChangeResizing
w.ignoreDPIChangeResizing = true
w32.SetWindowPos(w.hwnd, 0, physicalBounds.X, physicalBounds.Y, physicalBounds.Width, physicalBounds.Height, w32.SWP_NOZORDER|w32.SWP_NOACTIVATE)
w.ignoreDPIChangeResizing = previousFlag
}
// Get window dip bounds
func (w *windowsWebviewWindow) bounds() Rect {
return PhysicalToDipRect(w.physicalBounds())
}
// Set window dip bounds
func (w *windowsWebviewWindow) setBounds(bounds Rect) {
w.setPhysicalBounds(DipToPhysicalRect(bounds))
}
func (w *windowsWebviewWindow) size() (int, int) {
bounds := w.bounds()
return bounds.Width, bounds.Height
}
func (w *windowsWebviewWindow) width() int {
return w.bounds().Width
}
func (w *windowsWebviewWindow) height() int {
return w.bounds().Height
}
func (w *windowsWebviewWindow) setSize(width, height int) {
bounds := w.bounds()
bounds.Width = width
bounds.Height = height
w.setBounds(bounds)
}
func (w *windowsWebviewWindow) position() (int, int) {
bounds := w.bounds()
return bounds.X, bounds.Y
}
func (w *windowsWebviewWindow) setPosition(x int, y int) {
bounds := w.bounds()
bounds.X = x
bounds.Y = y
w.setBounds(bounds)
}
// Get window position relative to the screen WorkArea on which it is
func (w *windowsWebviewWindow) relativePosition() (int, int) {
screen, _ := w.getScreen()
pos := screen.absoluteToRelativeDipPoint(w.bounds().Origin())
// Relative to WorkArea origin
pos.X -= (screen.WorkArea.X - screen.X)
pos.Y -= (screen.WorkArea.Y - screen.Y)
return pos.X, pos.Y
}
// Set window position relative to the screen WorkArea on which it is
func (w *windowsWebviewWindow) setRelativePosition(x int, y int) {
screen, _ := w.getScreen()
pos := screen.relativeToAbsoluteDipPoint(Point{X: x, Y: y})
// Relative to WorkArea origin
pos.X += (screen.WorkArea.X - screen.X)
pos.Y += (screen.WorkArea.Y - screen.Y)
w.setPosition(pos.X, pos.Y)
}
func (w *windowsWebviewWindow) destroy() {
w.parent.markAsDestroyed()
if w.dropTarget != nil {
w.dropTarget.Release()
}
// destroy the window
w32.DestroyWindow(w.hwnd)
}
func (w *windowsWebviewWindow) reload() {
w.execJS("window.location.reload();")
}
func (w *windowsWebviewWindow) forceReload() {
// noop
}
func (w *windowsWebviewWindow) zoomReset() {
w.setZoom(1.0)
}
func (w *windowsWebviewWindow) zoomIn() {
// Increase the zoom level by 0.05
currentZoom := w.getZoom()
if currentZoom == -1 {
return
}
w.setZoom(currentZoom + 0.05)
}
func (w *windowsWebviewWindow) zoomOut() {
// Decrease the zoom level by 0.05
currentZoom := w.getZoom()
if currentZoom == -1 {
return
}
if currentZoom > 1.05 {
// Decrease the zoom level by 0.05
w.setZoom(currentZoom - 0.05)
} else {
// Set the zoom level to 1.0
w.setZoom(1.0)
}
}
func (w *windowsWebviewWindow) getZoom() float64 {
controller := w.chromium.GetController()
factor, err := controller.GetZoomFactor()
if err != nil {
return -1
}
return factor
}
func (w *windowsWebviewWindow) setZoom(zoom float64) {
w.chromium.PutZoomFactor(zoom)
}
func (w *windowsWebviewWindow) close() {
// Send WM_CLOSE message to trigger the same flow as clicking the X button
w32.SendMessage(w.hwnd, w32.WM_CLOSE, 0, 0)
}
func (w *windowsWebviewWindow) zoom() {
// Noop
}
func (w *windowsWebviewWindow) setHTML(html string) {
// Render the given HTML in the webview window
w.execJS(fmt.Sprintf("document.documentElement.innerHTML = %q;", html))
}
// on is used to indicate that a particular event should be listened for
func (w *windowsWebviewWindow) on(_ uint) {
// We don't need to worry about this in Windows as we do not need
// to optimise cgo calls
}
func (w *windowsWebviewWindow) minimise() {
w32.ShowWindow(w.hwnd, w32.SW_MINIMIZE)
}
func (w *windowsWebviewWindow) unminimise() {
w.restore()
}
func (w *windowsWebviewWindow) maximise() {
w32.ShowWindow(w.hwnd, w32.SW_MAXIMIZE)
w.chromium.Focus()
}
func (w *windowsWebviewWindow) unmaximise() {
w.restore()
}
func (w *windowsWebviewWindow) restore() {
w32.ShowWindow(w.hwnd, w32.SW_RESTORE)
w.chromium.Focus()
}
func (w *windowsWebviewWindow) fullscreen() {
if w.isFullscreen() {
return
}
if w.framelessWithDecorations() {
err := w32.ExtendFrameIntoClientArea(w.hwnd, false)
if err != nil {
globalApplication.handleFatalError(err)
}
}
w.disableSizeConstraints()
w.previousWindowStyle = uint32(w32.GetWindowLongPtr(w.hwnd, w32.GWL_STYLE))
w.previousWindowExStyle = uint32(w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE))
monitor := w32.MonitorFromWindow(w.hwnd, w32.MONITOR_DEFAULTTOPRIMARY)
var monitorInfo w32.MONITORINFO
monitorInfo.CbSize = uint32(unsafe.Sizeof(monitorInfo))
if !w32.GetMonitorInfo(monitor, &monitorInfo) {
return
}
if !w32.GetWindowPlacement(w.hwnd, &w.previousWindowPlacement) {
return
}
// According to https://devblogs.microsoft.com/oldnewthing/20050505-04/?p=35703 one should use w32.WS_POPUP | w32.WS_VISIBLE
w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, w.previousWindowStyle & ^uint32(w32.WS_OVERLAPPEDWINDOW) | (w32.WS_POPUP|w32.WS_VISIBLE))
w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, w.previousWindowExStyle & ^uint32(w32.WS_EX_DLGMODALFRAME))
w.isCurrentlyFullscreen = true
w32.SetWindowPos(w.hwnd, w32.HWND_TOP,
int(monitorInfo.RcMonitor.Left),
int(monitorInfo.RcMonitor.Top),
int(monitorInfo.RcMonitor.Right-monitorInfo.RcMonitor.Left),
int(monitorInfo.RcMonitor.Bottom-monitorInfo.RcMonitor.Top),
w32.SWP_NOOWNERZORDER|w32.SWP_FRAMECHANGED)
w.chromium.Focus()
}
func (w *windowsWebviewWindow) unfullscreen() {
if !w.isFullscreen() {
return
}
if w.framelessWithDecorations() {
err := w32.ExtendFrameIntoClientArea(w.hwnd, true)
if err != nil {
globalApplication.handleFatalError(err)
}
}
w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, w.previousWindowStyle)
w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, w.previousWindowExStyle)
w32.SetWindowPlacement(w.hwnd, &w.previousWindowPlacement)
w.isCurrentlyFullscreen = false
w32.SetWindowPos(w.hwnd, 0, 0, 0, 0, 0,
w32.SWP_NOMOVE|w32.SWP_NOSIZE|w32.SWP_NOZORDER|w32.SWP_NOOWNERZORDER|w32.SWP_FRAMECHANGED)
w.enableSizeConstraints()
}
func (w *windowsWebviewWindow) isMinimised() bool {
style := uint32(w32.GetWindowLong(w.hwnd, w32.GWL_STYLE))
return style&w32.WS_MINIMIZE != 0
}
func (w *windowsWebviewWindow) isMaximised() bool {
style := uint32(w32.GetWindowLong(w.hwnd, w32.GWL_STYLE))
return style&w32.WS_MAXIMIZE != 0
}
func (w *windowsWebviewWindow) isFocused() bool {
// Returns true if the window is currently focused
return w32.GetForegroundWindow() == w.hwnd
}
func (w *windowsWebviewWindow) isFullscreen() bool {
// TODO: Actually calculate this based on size of window against screen size
// => stffabi: This flag is essential since it indicates that we are in fullscreen mode even before the native properties
// reflect this, e.g. when needing to know if we are in fullscreen during a wndproc message.
// That's also why this flag is set before SetWindowPos in v2 in fullscreen/unfullscreen.
return w.isCurrentlyFullscreen
}
func (w *windowsWebviewWindow) isNormal() bool {
return !w.isMinimised() && !w.isMaximised() && !w.isFullscreen()
}
func (w *windowsWebviewWindow) isVisible() bool {
style := uint32(w32.GetWindowLong(w.hwnd, w32.GWL_STYLE))
return style&w32.WS_VISIBLE != 0
}
func (w *windowsWebviewWindow) setFullscreenButtonEnabled(_ bool) {
// Unused in Windows
}
func (w *windowsWebviewWindow) focus() {
w32.SetForegroundWindow(w.hwnd)
w.focusingChromium = true
w.chromium.Focus()
w.focusingChromium = false
}
// printStyle takes a windows style and prints it in a human-readable format
// This is for debugging window style issues
func (w *windowsWebviewWindow) printStyle() {
style := uint32(w32.GetWindowLong(w.hwnd, w32.GWL_STYLE))
fmt.Printf("Style: ")
if style&w32.WS_BORDER != 0 {
fmt.Printf("WS_BORDER ")
}
if style&w32.WS_CAPTION != 0 {
fmt.Printf("WS_CAPTION ")
}
if style&w32.WS_CHILD != 0 {
fmt.Printf("WS_CHILD ")
}
if style&w32.WS_CLIPCHILDREN != 0 {
fmt.Printf("WS_CLIPCHILDREN ")
}
if style&w32.WS_CLIPSIBLINGS != 0 {
fmt.Printf("WS_CLIPSIBLINGS ")
}
if style&w32.WS_DISABLED != 0 {
fmt.Printf("WS_DISABLED ")
}
if style&w32.WS_DLGFRAME != 0 {
fmt.Printf("WS_DLGFRAME ")
}
if style&w32.WS_GROUP != 0 {
fmt.Printf("WS_GROUP ")
}
if style&w32.WS_HSCROLL != 0 {
fmt.Printf("WS_HSCROLL ")
}
if style&w32.WS_MAXIMIZE != 0 {
fmt.Printf("WS_MAXIMIZE ")
}
if style&w32.WS_MAXIMIZEBOX != 0 {
fmt.Printf("WS_MAXIMIZEBOX ")
}
if style&w32.WS_MINIMIZE != 0 {
fmt.Printf("WS_MINIMIZE ")
}
if style&w32.WS_MINIMIZEBOX != 0 {
fmt.Printf("WS_MINIMIZEBOX ")
}
if style&w32.WS_OVERLAPPED != 0 {
fmt.Printf("WS_OVERLAPPED ")
}
if style&w32.WS_POPUP != 0 {
fmt.Printf("WS_POPUP ")
}
if style&w32.WS_SYSMENU != 0 {
fmt.Printf("WS_SYSMENU ")
}
if style&w32.WS_TABSTOP != 0 {
fmt.Printf("WS_TABSTOP ")
}
if style&w32.WS_THICKFRAME != 0 {
fmt.Printf("WS_THICKFRAME ")
}
if style&w32.WS_VISIBLE != 0 {
fmt.Printf("WS_VISIBLE ")
}
if style&w32.WS_VSCROLL != 0 {
fmt.Printf("WS_VSCROLL ")
}
fmt.Printf("\n")
// Do the same for the extended style
extendedStyle := uint32(w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE))
fmt.Printf("Extended Style: ")
if extendedStyle&w32.WS_EX_ACCEPTFILES != 0 {
fmt.Printf("WS_EX_ACCEPTFILES ")
}
if extendedStyle&w32.WS_EX_APPWINDOW != 0 {
fmt.Printf("WS_EX_APPWINDOW ")
}
if extendedStyle&w32.WS_EX_CLIENTEDGE != 0 {
fmt.Printf("WS_EX_CLIENTEDGE ")
}
if extendedStyle&w32.WS_EX_COMPOSITED != 0 {
fmt.Printf("WS_EX_COMPOSITED ")
}
if extendedStyle&w32.WS_EX_CONTEXTHELP != 0 {
fmt.Printf("WS_EX_CONTEXTHELP ")
}
if extendedStyle&w32.WS_EX_CONTROLPARENT != 0 {
fmt.Printf("WS_EX_CONTROLPARENT ")
}
if extendedStyle&w32.WS_EX_DLGMODALFRAME != 0 {
fmt.Printf("WS_EX_DLGMODALFRAME ")
}
if extendedStyle&w32.WS_EX_LAYERED != 0 {
fmt.Printf("WS_EX_LAYERED ")
}
if extendedStyle&w32.WS_EX_LAYOUTRTL != 0 {
fmt.Printf("WS_EX_LAYOUTRTL ")
}
if extendedStyle&w32.WS_EX_LEFT != 0 {
fmt.Printf("WS_EX_LEFT ")
}
if extendedStyle&w32.WS_EX_LEFTSCROLLBAR != 0 {
fmt.Printf("WS_EX_LEFTSCROLLBAR ")
}
if extendedStyle&w32.WS_EX_LTRREADING != 0 {
fmt.Printf("WS_EX_LTRREADING ")
}
if extendedStyle&w32.WS_EX_MDICHILD != 0 {
fmt.Printf("WS_EX_MDICHILD ")
}
if extendedStyle&w32.WS_EX_NOACTIVATE != 0 {
fmt.Printf("WS_EX_NOACTIVATE ")
}
if extendedStyle&w32.WS_EX_NOINHERITLAYOUT != 0 {
fmt.Printf("WS_EX_NOINHERITLAYOUT ")
}
if extendedStyle&w32.WS_EX_NOPARENTNOTIFY != 0 {
fmt.Printf("WS_EX_NOPARENTNOTIFY ")
}
if extendedStyle&w32.WS_EX_NOREDIRECTIONBITMAP != 0 {
fmt.Printf("WS_EX_NOREDIRECTIONBITMAP ")
}
if extendedStyle&w32.WS_EX_OVERLAPPEDWINDOW != 0 {
fmt.Printf("WS_EX_OVERLAPPEDWINDOW ")
}
if extendedStyle&w32.WS_EX_PALETTEWINDOW != 0 {
fmt.Printf("WS_EX_PALETTEWINDOW ")
}
if extendedStyle&w32.WS_EX_RIGHT != 0 {
fmt.Printf("WS_EX_RIGHT ")
}
if extendedStyle&w32.WS_EX_RIGHTSCROLLBAR != 0 {
fmt.Printf("WS_EX_RIGHTSCROLLBAR ")
}
if extendedStyle&w32.WS_EX_RTLREADING != 0 {
fmt.Printf("WS_EX_RTLREADING ")
}
if extendedStyle&w32.WS_EX_STATICEDGE != 0 {
fmt.Printf("WS_EX_STATICEDGE ")
}
if extendedStyle&w32.WS_EX_TOOLWINDOW != 0 {
fmt.Printf("WS_EX_TOOLWINDOW ")
}
if extendedStyle&w32.WS_EX_TOPMOST != 0 {
fmt.Printf("WS_EX_TOPMOST ")
}
if extendedStyle&w32.WS_EX_TRANSPARENT != 0 {
fmt.Printf("WS_EX_TRANSPARENT ")
}
if extendedStyle&w32.WS_EX_WINDOWEDGE != 0 {
fmt.Printf("WS_EX_WINDOWEDGE ")
}
fmt.Printf("\n")
}
func (w *windowsWebviewWindow) show() {
if w.webviewNavigationCompleted {
w.chromium.Show()
w32.ShowWindow(w.hwnd, w32.SW_SHOW)
}
}
func (w *windowsWebviewWindow) hide() {
w32.ShowWindow(w.hwnd, w32.SW_HIDE)
}
// Get the screen for the current window
func (w *windowsWebviewWindow) getScreen() (*Screen, error) {
return getScreenForWindow(w)
}
func (w *windowsWebviewWindow) setFrameless(b bool) {
// Remove or add the frame
if b {
w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, w32.WS_VISIBLE|w32.WS_POPUP)
} else {
w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, w32.WS_VISIBLE|w32.WS_OVERLAPPEDWINDOW)
}
w32.SetWindowPos(w.hwnd, 0, 0, 0, 0, 0, w32.SWP_NOMOVE|w32.SWP_NOSIZE|w32.SWP_NOZORDER|w32.SWP_FRAMECHANGED)
}
func newWindowImpl(parent *WebviewWindow) *windowsWebviewWindow {
result := &windowsWebviewWindow{
parent: parent,
resizeBorderWidth: int32(w32.GetSystemMetrics(w32.SM_CXSIZEFRAME)),
resizeBorderHeight: int32(w32.GetSystemMetrics(w32.SM_CYSIZEFRAME)),
}
return result
}
func (w *windowsWebviewWindow) openContextMenu(menu *Menu, _ *ContextMenuData) {
// Create the menu
thisMenu := NewPopupMenu(w.hwnd, menu)
thisMenu.Update()
w.currentlyOpenContextMenu = thisMenu
thisMenu.ShowAtCursor()
}
func (w *windowsWebviewWindow) setStyle(b bool, style int) {
currentStyle := int(w32.GetWindowLongPtr(w.hwnd, w32.GWL_STYLE))
if currentStyle != 0 {
currentStyle = lo.Ternary(b, currentStyle|style, currentStyle&^style)
w32.SetWindowLongPtr(w.hwnd, w32.GWL_STYLE, uintptr(currentStyle))
}
}
func (w *windowsWebviewWindow) setExStyle(b bool, style int) {
currentStyle := int(w32.GetWindowLongPtr(w.hwnd, w32.GWL_EXSTYLE))
if currentStyle != 0 {
currentStyle = lo.Ternary(b, currentStyle|style, currentStyle&^style)
w32.SetWindowLongPtr(w.hwnd, w32.GWL_EXSTYLE, uintptr(currentStyle))
}
}
func (w *windowsWebviewWindow) setBackdropType(backdropType BackdropType) {
if !w32.SupportsBackdropTypes() {
var accent = w32.ACCENT_POLICY{
AccentState: w32.ACCENT_ENABLE_BLURBEHIND,
}
var data w32.WINDOWCOMPOSITIONATTRIBDATA
data.Attrib = w32.WCA_ACCENT_POLICY
data.PvData = w32.PVOID(&accent)
data.CbData = unsafe.Sizeof(accent)
w32.SetWindowCompositionAttribute(w.hwnd, &data)
} else {
w32.EnableTranslucency(w.hwnd, int32(backdropType))
}
}
func (w *windowsWebviewWindow) setIcon(icon w32.HICON) {
w32.SendMessage(w.hwnd, w32.WM_SETICON, w32.ICON_BIG, icon)
}
func (w *windowsWebviewWindow) disableIcon() {
// TODO: If frameless, return
exStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)
w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, uint32(exStyle|w32.WS_EX_DLGMODALFRAME))
w32.SetWindowPos(w.hwnd, 0, 0, 0, 0, 0,
uint(
w32.SWP_FRAMECHANGED|
w32.SWP_NOMOVE|
w32.SWP_NOSIZE|
w32.SWP_NOZORDER),
)
}
func (w *windowsWebviewWindow) updateTheme(isDarkMode bool) {
if w32.IsCurrentlyHighContrastMode() {
return
}
if !w32.SupportsThemes() {
return
}
w32.SetTheme(w.hwnd, isDarkMode)
// Custom theme processing
customTheme := w.parent.options.Windows.CustomTheme
// Custom theme
if w32.SupportsCustomThemes() && customTheme != nil {
w32.InitDarkMode(customTheme.DarkModeMenuBar)
if w.isActive() {
if isDarkMode {
w32.SetTitleBarColour(w.hwnd, customTheme.DarkModeTitleBar)
w32.SetTitleTextColour(w.hwnd, customTheme.DarkModeTitleText)
w32.SetBorderColour(w.hwnd, customTheme.DarkModeBorder)
} else {
w32.SetTitleBarColour(w.hwnd, customTheme.LightModeTitleBar)
w32.SetTitleTextColour(w.hwnd, customTheme.LightModeTitleText)
w32.SetBorderColour(w.hwnd, customTheme.LightModeBorder)
}
} else {
if isDarkMode {
w32.SetTitleBarColour(w.hwnd, customTheme.DarkModeTitleBarInactive)
w32.SetTitleTextColour(w.hwnd, customTheme.DarkModeTitleTextInactive)
w32.SetBorderColour(w.hwnd, customTheme.DarkModeBorderInactive)
} else {
w32.SetTitleBarColour(w.hwnd, customTheme.LightModeTitleBarInactive)
w32.SetTitleTextColour(w.hwnd, customTheme.LightModeTitleTextInactive)
w32.SetBorderColour(w.hwnd, customTheme.LightModeBorderInactive)
}
}
}
}
func (w *windowsWebviewWindow) isActive() bool {
return w32.GetForegroundWindow() == w.hwnd
}
var resizePending int32
func (w *windowsWebviewWindow) WndProc(msg uint32, wparam, lparam uintptr) uintptr {
processed, code := w32.MenuBarWndProc(w.hwnd, msg, wparam, lparam)
if processed {
return code
}
switch msg {
case w32.WM_ACTIVATE:
if int(wparam&0xffff) == w32.WA_INACTIVE {
w.parent.emit(events.Windows.WindowInactive)
}
if wparam == w32.WA_ACTIVE {
getNativeApplication().currentWindowID = w.parent.id
w.parent.emit(events.Windows.WindowActive)
}
if wparam == w32.WA_CLICKACTIVE {
getNativeApplication().currentWindowID = w.parent.id
w.parent.emit(events.Windows.WindowClickActive)
}
// If we want to have a frameless window but with the default frame decorations, extend the DWM client area.
// This Option is not affected by returning 0 in WM_NCCALCSIZE.
// As a result we have hidden the titlebar but still have the default window frame styling.
// See: https://docs.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmextendframeintoclientarea#remarks
if w.framelessWithDecorations() {
err := w32.ExtendFrameIntoClientArea(w.hwnd, true)
if err != nil {
globalApplication.handleFatalError(err)
}
}
case w32.WM_CLOSE:
if w.parent.unconditionallyClose == false {
// We were called by `Close()` or pressing the close button on the window
w.parent.emit(events.Windows.WindowClosing)
return 0
}
defer func() {
windowsApp := globalApplication.impl.(*windowsApp)
windowsApp.unregisterWindow(w)
}()
// Now do the actual close
w.chromium.ShuttingDown()
return w32.DefWindowProc(w.hwnd, w32.WM_CLOSE, 0, 0)
case w32.WM_KILLFOCUS:
if w.focusingChromium {
return 0
}
w.parent.emit(events.Windows.WindowKillFocus)
case w32.WM_ENTERSIZEMOVE:
// This is needed to close open dropdowns when moving the window https://github.com/MicrosoftEdge/WebView2Feedback/issues/2290
w32.SetFocus(w.hwnd)
if int(w32.GetKeyState(w32.VK_LBUTTON))&(0x8000) != 0 {
// Left mouse button is down - window is being moved
w.parent.emit(events.Windows.WindowStartMove)
} else {
// Window is being resized
w.parent.emit(events.Windows.WindowStartResize)
}
case w32.WM_EXITSIZEMOVE:
if int(w32.GetKeyState(w32.VK_LBUTTON))&0x8000 != 0 {
w.parent.emit(events.Windows.WindowEndMove)
} else {
w.parent.emit(events.Windows.WindowEndResize)
}
case w32.WM_SETFOCUS:
w.focus()
w.parent.emit(events.Windows.WindowSetFocus)
case w32.WM_MOVE, w32.WM_MOVING:
_ = w.chromium.NotifyParentWindowPositionChanged()
w.moveDebouncer(func() {
w.parent.emit(events.Windows.WindowDidMove)
})
case w32.WM_SHOWWINDOW:
if wparam == 1 {
w.parent.emit(events.Windows.WindowShow)
} else {
w.parent.emit(events.Windows.WindowHide)
}
case w32.WM_WINDOWPOSCHANGED:
windowPos := (*w32.WINDOWPOS)(unsafe.Pointer(lparam))
if windowPos.Flags&w32.SWP_NOZORDER == 0 {
w.parent.emit(events.Windows.WindowZOrderChanged)
}
case w32.WM_PAINT:
w.parent.emit(events.Windows.WindowPaint)
case w32.WM_ERASEBKGND:
w.parent.emit(events.Windows.WindowBackgroundErase)
return 1 // Let WebView2 handle background erasing
// Check for keypress
case w32.WM_SYSCOMMAND:
switch wparam {
case w32.SC_KEYMENU:
if lparam == 0 {
// F10 or plain Alt key
if w.processKeyBinding(w32.VK_F10) {
return 0
}
} else {
// Alt + key combination
// The character code is in the low word of lparam
char := byte(lparam & 0xFF)
// Convert ASCII to virtual key code if needed
vkey := w32.VkKeyScan(uint16(char))
if w.processKeyBinding(uint(vkey)) {
return 0
}
}
}
case w32.WM_SYSKEYDOWN:
globalApplication.info("w32.WM_SYSKEYDOWN: %v", uint(wparam))
w.parent.emit(events.Windows.WindowKeyDown)
if w.processKeyBinding(uint(wparam)) {
return 0
}
case w32.WM_SYSKEYUP:
w.parent.emit(events.Windows.WindowKeyUp)
case w32.WM_KEYDOWN:
w.parent.emit(events.Windows.WindowKeyDown)
w.processKeyBinding(uint(wparam))
case w32.WM_KEYUP:
w.parent.emit(events.Windows.WindowKeyUp)
case w32.WM_SIZE:
switch wparam {
case w32.SIZE_MAXIMIZED:
w.parent.emit(events.Windows.WindowMaximise)
case w32.SIZE_RESTORED:
w.isMinimizing = false
w.parent.emit(events.Windows.WindowRestore)
case w32.SIZE_MINIMIZED:
w.isMinimizing = true
w.parent.emit(events.Windows.WindowMinimise)
}
doResize := func() {
// Get the new size from lparam
width := int32(lparam & 0xFFFF)
height := int32((lparam >> 16) & 0xFFFF)
bounds := &edge.Rect{
Left: 0,
Top: 0,
Right: width,
Bottom: height,
}
InvokeSync(func() {
time.Sleep(1 * time.Nanosecond)
w.chromium.ResizeWithBounds(bounds)
atomic.StoreInt32(&resizePending, 0)
w.parent.emit(events.Windows.WindowDidResize)
})
}
if w.parent.options.Frameless && wparam == w32.SIZE_MINIMIZED {
// If the window is frameless, and we are minimizing, then we need to suppress the Resize on the
// WebView2. If we don't do this, restoring does not work as expected and first restores with some wrong
// size during the restore animation and only fully renders when the animation is done. This highly
// depends on the content in the WebView, see https://github.com/MicrosoftEdge/WebView2Feedback/issues/2549
} else if w.resizeDebouncer != nil {
w.resizeDebouncer(doResize)
} else {
if atomic.CompareAndSwapInt32(&resizePending, 0, 1) {
doResize()
}
}
return 0
case w32.WM_GETMINMAXINFO:
mmi := (*w32.MINMAXINFO)(unsafe.Pointer(lparam))
hasConstraints := false
options := w.parent.options
// Using ScreenManager to get the closest screen and scale according to its DPI is problematic
// here because in multi-monitor setup, when dragging the window between monitors with the mouse
// on the side with the higher DPI, the DPI change point is offset beyond the mid point, causing
// wrong scaling and unwanted resizing when using the monitor DPI. To avoid this issue, we use
// scaleWithWindowDPI() instead which retrieves the correct DPI with GetDpiForWindow().
if options.MinWidth > 0 || options.MinHeight > 0 {
hasConstraints = true
width, height := w.scaleWithWindowDPI(options.MinWidth, options.MinHeight)
if width > 0 {
mmi.PtMinTrackSize.X = int32(width)
}
if height > 0 {
mmi.PtMinTrackSize.Y = int32(height)
}
}
if options.MaxWidth > 0 || options.MaxHeight > 0 {
hasConstraints = true
width, height := w.scaleWithWindowDPI(options.MaxWidth, options.MaxHeight)
if width > 0 {
mmi.PtMaxTrackSize.X = int32(width)
}
if height > 0 {
mmi.PtMaxTrackSize.Y = int32(height)
}
}
if hasConstraints {
return 0
}
case w32.WM_DPICHANGED:
if !w.ignoreDPIChangeResizing {
newWindowRect := (*w32.RECT)(unsafe.Pointer(lparam))
w32.SetWindowPos(w.hwnd,
uintptr(0),
int(newWindowRect.Left),
int(newWindowRect.Top),
int(newWindowRect.Right-newWindowRect.Left),
int(newWindowRect.Bottom-newWindowRect.Top),
w32.SWP_NOZORDER|w32.SWP_NOACTIVATE)
}
w.parent.emit(events.Windows.WindowDPIChanged)
}
if w.parent.options.Windows.WindowMask != nil {
switch msg {
case w32.WM_NCHITTEST:
if w.parent.options.Windows.WindowMaskDraggable {
return w32.HTCAPTION
}
w.parent.emit(events.Windows.WindowNonClientHit)
return w32.HTCLIENT
case w32.WM_NCLBUTTONDOWN:
w.parent.emit(events.Windows.WindowNonClientMouseDown)
case w32.WM_NCLBUTTONUP:
w.parent.emit(events.Windows.WindowNonClientMouseUp)
case w32.WM_NCMOUSEMOVE:
w.parent.emit(events.Windows.WindowNonClientMouseMove)
case w32.WM_NCMOUSELEAVE:
w.parent.emit(events.Windows.WindowNonClientMouseLeave)
}
}
if w.menu != nil || w.currentlyOpenContextMenu != nil {
switch msg {
case w32.WM_COMMAND:
cmdMsgID := int(wparam & 0xffff)
switch cmdMsgID {
default:
var processed bool
if w.currentlyOpenContextMenu != nil {
processed = w.currentlyOpenContextMenu.ProcessCommand(cmdMsgID)
w.currentlyOpenContextMenu = nil
}
if !processed && w.menu != nil {
processed = w.menu.ProcessCommand(cmdMsgID)
}
}
}
}
if options := w.parent.options; options.Frameless {
switch msg {
case w32.WM_ACTIVATE:
// If we want to have a frameless window but with the default frame decorations, extend the DWM client area.
// This Option is not affected by returning 0 in WM_NCCALCSIZE.
// As a result we have hidden the titlebar but still have the default window frame styling.
// See: https://docs.microsoft.com/en-us/windows/win32/api/dwmapi/nf-dwmapi-dwmextendframeintoclientarea#remarks
if w.framelessWithDecorations() {
err := w32.ExtendFrameIntoClientArea(w.hwnd, true)
if err != nil {
globalApplication.handleFatalError(err)
}
}
case w32.WM_NCCALCSIZE:
// Disable the standard frame by allowing the client area to take the full
// window size.
// See: https://docs.microsoft.com/en-us/windows/win32/winmsg/wm-nccalcsize#remarks
// This hides the titlebar and also disables the resizing from user interaction because the standard frame is not
// shown. We still need the WS_THICKFRAME style to enable resizing from the frontend.
if wparam != 0 {
rgrc := (*w32.RECT)(unsafe.Pointer(lparam))
if w.isCurrentlyFullscreen {
// In Full-Screen mode we don't need to adjust anything
// It essential we have the flag here, that is set before SetWindowPos in fullscreen/unfullscreen
// because the native size might not yet reflect we are in fullscreen during this event!
w.setPadding(edge.Rect{})
} else if w.isMaximised() {
// If the window is maximized we must adjust the client area to the work area of the monitor. Otherwise
// some content goes beyond the visible part of the monitor.
// Make sure to use the provided RECT to get the monitor, because during maximizig there might be
// a wrong monitor returned in multiscreen mode when using MonitorFromWindow.
// See: https://github.com/MicrosoftEdge/WebView2Feedback/issues/2549
screen := ScreenNearestPhysicalRect(Rect{
X: int(rgrc.Left),
Y: int(rgrc.Top),
Width: int(rgrc.Right - rgrc.Left),
Height: int(rgrc.Bottom - rgrc.Top),
})
rect := screen.PhysicalWorkArea
maxWidth := options.MaxWidth
maxHeight := options.MaxHeight
if maxWidth > 0 {
maxWidth = screen.scale(maxWidth, false)
if rect.Width > maxWidth {
rect.Width = maxWidth
}
}
if maxHeight > 0 {
maxHeight = screen.scale(maxHeight, false)
if rect.Height > maxHeight {
rect.Height = maxHeight
}
}
*rgrc = w32.RECT{
Left: int32(rect.X),
Top: int32(rect.Y),
Right: int32(rect.X + rect.Width),
Bottom: int32(rect.Y + rect.Height),
}
w.setPadding(edge.Rect{})
} else {
// This is needed to work around the resize flickering in frameless mode with WindowDecorations
// See: https://stackoverflow.com/a/6558508
// The workaround from the SO answer suggests to reduce the bottom of the window by 1px.
// However, this would result in losing 1px of the WebView content.
// Increasing the bottom also worksaround the flickering, but we would lose 1px of the WebView content
// therefore let's pad the content with 1px at the bottom.
rgrc.Bottom += 1
w.setPadding(edge.Rect{Bottom: 1})
}
return 0
}
}
}
return w32.DefWindowProc(w.hwnd, msg, wparam, lparam)
}
func (w *windowsWebviewWindow) DPI() (w32.UINT, w32.UINT) {
if w32.HasGetDpiForWindowFunc() {
// GetDpiForWindow is supported beginning with Windows 10, 1607 and is the most accurate
// one, especially it is consistent with the WM_DPICHANGED event.
dpi := w32.GetDpiForWindow(w.hwnd)
return dpi, dpi
}
if w32.HasGetDPIForMonitorFunc() {
// GetDpiForWindow is supported beginning with Windows 8.1
monitor := w32.MonitorFromWindow(w.hwnd, w32.MONITOR_DEFAULTTONEAREST)
if monitor == 0 {
return 0, 0
}
var dpiX, dpiY w32.UINT
w32.GetDPIForMonitor(monitor, w32.MDT_EFFECTIVE_DPI, &dpiX, &dpiY)
return dpiX, dpiY
}
// If none of the above is supported fallback to the System DPI.
screen := w32.GetDC(0)
x := w32.GetDeviceCaps(screen, w32.LOGPIXELSX)
y := w32.GetDeviceCaps(screen, w32.LOGPIXELSY)
w32.ReleaseDC(0, screen)
return w32.UINT(x), w32.UINT(y)
}
func (w *windowsWebviewWindow) scaleWithWindowDPI(width, height int) (int, int) {
dpix, dpiy := w.DPI()
scaledWidth := ScaleWithDPI(width, dpix)
scaledHeight := ScaleWithDPI(height, dpiy)
return scaledWidth, scaledHeight
}
func ScaleWithDPI(pixels int, dpi uint) int {
return (pixels * int(dpi)) / 96
}
func (w *windowsWebviewWindow) setWindowMask(imageData []byte) {
// Set the window to a WS_EX_LAYERED window
newStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE) | w32.WS_EX_LAYERED
if w.isAlwaysOnTop() {
newStyle |= w32.WS_EX_TOPMOST
}
// Save the current window style
w.previousWindowExStyle = uint32(w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE))
w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, uint32(newStyle))
data, err := pngToImage(imageData)
if err != nil {
globalApplication.fatal("Fatal error in callback setWindowMask: " + err.Error())
}
bitmap, err := w32.CreateHBITMAPFromImage(data)
hdc := w32.CreateCompatibleDC(0)
defer w32.DeleteDC(hdc)
oldBitmap := w32.SelectObject(hdc, bitmap)
defer w32.SelectObject(hdc, oldBitmap)
screenDC := w32.GetDC(0)
defer w32.ReleaseDC(0, screenDC)
size := w32.SIZE{CX: int32(data.Bounds().Dx()), CY: int32(data.Bounds().Dy())}
ptSrc := w32.POINT{X: 0, Y: 0}
ptDst := w32.POINT{X: int32(w.width()), Y: int32(w.height())}
blend := w32.BLENDFUNCTION{
BlendOp: w32.AC_SRC_OVER,
BlendFlags: 0,
SourceConstantAlpha: 255,
AlphaFormat: w32.AC_SRC_ALPHA,
}
w32.UpdateLayeredWindow(w.hwnd, screenDC, &ptDst, &size, hdc, &ptSrc, 0, &blend, w32.ULW_ALPHA)
}
func (w *windowsWebviewWindow) isAlwaysOnTop() bool {
return w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)&w32.WS_EX_TOPMOST != 0
}
// processMessage is given a message sent from JS via the postMessage API
// We put it on the global window message buffer to be processed centrally
func (w *windowsWebviewWindow) processMessage(message string) {
// We send all messages to the centralised window message buffer
windowMessageBuffer <- &windowMessage{
windowId: w.parent.id,
message: message,
}
}
func (w *windowsWebviewWindow) processRequest(req *edge.ICoreWebView2WebResourceRequest, args *edge.ICoreWebView2WebResourceRequestedEventArgs) {
// Setting the UserAgent on the CoreWebView2Settings clears the whole default UserAgent of the Edge browser, but
// we want to just append our ApplicationIdentifier. So we adjust the UserAgent for every request.
if reqHeaders, err := req.GetHeaders(); err == nil {
useragent, _ := reqHeaders.GetHeader(assetserver.HeaderUserAgent)
useragent = strings.Join([]string{useragent, assetserver.WailsUserAgentValue}, " ")
err = reqHeaders.SetHeader(assetserver.HeaderUserAgent, useragent)
if err != nil {
globalApplication.fatal("Error setting UserAgent header: " + err.Error())
}
err = reqHeaders.SetHeader(webViewRequestHeaderWindowId, strconv.FormatUint(uint64(w.parent.id), 10))
if err != nil {
globalApplication.fatal("Error setting WindowId header: " + err.Error())
}
err = reqHeaders.Release()
if err != nil {
globalApplication.fatal("Error releasing headers: " + err.Error())
}
}
if globalApplication.assets == nil {
// We are using the devServer let the WebView2 handle the request with its default handler
return
}
//Get the request
uri, _ := req.GetUri()
reqUri, err := url.ParseRequestURI(uri)
if err != nil {
globalApplication.error("Unable to parse request uri: uri='%s' error='%s'", uri, err)
return
}
if reqUri.Scheme != "http" {
// Let the WebView2 handle the request with its default handler
return
} else if !strings.HasPrefix(reqUri.Host, "wails.localhost") {
// Let the WebView2 handle the request with its default handler
return
}
webviewRequest, err := webview.NewRequest(
w.chromium.Environment(),
args,
func(fn func()) {
InvokeSync(fn)
})
if err != nil {
globalApplication.error("%s: NewRequest failed: %s", uri, err)
return
}
webviewRequests <- &webViewAssetRequest{
Request: webviewRequest,
windowId: w.parent.id,
windowName: w.parent.options.Name,
}
}
func (w *windowsWebviewWindow) setupChromium() {
chromium := w.chromium
debugMode := globalApplication.isDebugMode
opts := w.parent.options.Windows
webview2version, err := webviewloader.GetAvailableCoreWebView2BrowserVersionString(globalApplication.options.Windows.WebviewBrowserPath)
if err != nil {
globalApplication.error("Error getting WebView2 version: " + err.Error())
return
}
globalApplication.capabilities = capabilities.NewCapabilities(webview2version)
// We disable this by default. Can be overridden with the `EnableFraudulentWebsiteWarnings` option
opts.DisabledFeatures = append(opts.DisabledFeatures, "msSmartScreenProtection")
if len(opts.DisabledFeatures) > 0 {
opts.DisabledFeatures = lo.Uniq(opts.DisabledFeatures)
arg := fmt.Sprintf("--disable-features=%s", strings.Join(opts.DisabledFeatures, ","))
chromium.AdditionalBrowserArgs = append(chromium.AdditionalBrowserArgs, arg)
}
if len(opts.EnabledFeatures) > 0 {
opts.EnabledFeatures = lo.Uniq(opts.EnabledFeatures)
arg := fmt.Sprintf("--enable-features=%s", strings.Join(opts.EnabledFeatures, ","))
chromium.AdditionalBrowserArgs = append(chromium.AdditionalBrowserArgs, arg)
}
chromium.DataPath = globalApplication.options.Windows.WebviewUserDataPath
chromium.BrowserPath = globalApplication.options.Windows.WebviewBrowserPath
if opts.Permissions != nil {
for permission, state := range opts.Permissions {
chromium.SetPermission(edge.CoreWebView2PermissionKind(permission),
edge.CoreWebView2PermissionState(state))
}
}
chromium.MessageCallback = w.processMessage
chromium.MessageWithAdditionalObjectsCallback = w.processMessageWithAdditionalObjects
chromium.WebResourceRequestedCallback = w.processRequest
chromium.ContainsFullScreenElementChangedCallback = w.fullscreenChanged
chromium.NavigationCompletedCallback = w.navigationCompleted
chromium.AcceleratorKeyCallback = w.processKeyBinding
chromium.Embed(w.hwnd)
if chromium.HasCapability(edge.SwipeNavigation) {
err := chromium.PutIsSwipeNavigationEnabled(opts.EnableSwipeGestures)
if err != nil {
globalApplication.fatal(err.Error())
}
}
if chromium.HasCapability(edge.AllowExternalDrop) {
err := chromium.AllowExternalDrag(false)
if err != nil {
globalApplication.fatal(err.Error())
}
}
if w.parent.options.EnableDragAndDrop {
w.dropTarget = w32.NewDropTarget()
w.dropTarget.OnDrop = func(files []string) {
w.parent.emit(events.Windows.WindowDragDrop)
windowDragAndDropBuffer <- &dragAndDropMessage{
windowId: windowID,
filenames: files,
}
}
if opts.OnEnterEffect != 0 {
w.dropTarget.OnEnterEffect = convertEffect(opts.OnEnterEffect)
}
if opts.OnOverEffect != 0 {
w.dropTarget.OnOverEffect = convertEffect(opts.OnOverEffect)
}
w.dropTarget.OnEnter = func() {
w.parent.emit(events.Windows.WindowDragEnter)
}
w.dropTarget.OnLeave = func() {
w.parent.emit(events.Windows.WindowDragLeave)
}
w.dropTarget.OnOver = func() {
w.parent.emit(events.Windows.WindowDragOver)
}
// Enumerate all the child windows for this window and register them as drop targets
w32.EnumChildWindows(w.hwnd, func(hwnd w32.HWND, lparam w32.LPARAM) w32.LRESULT {
// Check if the window class is "Chrome_RenderWidgetHostHWND"
// If it is, then we register it as a drop target
//windowName := w32.GetClassName(hwnd)
//println(windowName)
//if windowName == "Chrome_RenderWidgetHostHWND" {
err := w32.RegisterDragDrop(hwnd, w.dropTarget)
if err != nil && !errors.Is(err, syscall.Errno(w32.DRAGDROP_E_ALREADYREGISTERED)) {
globalApplication.error("Error registering drag and drop: " + err.Error())
}
//}
return 1
})
}
if opts.GeneralAutofillEnabled {
err = chromium.PutIsGeneralAutofillEnabled(true)
if err != nil {
if errors.Is(edge.UnsupportedCapabilityError, err) {
// warning
globalApplication.warning("unsupported capability: GeneralAutofillEnabled")
} else {
globalApplication.fatal(err.Error())
}
}
}
if opts.PasswordAutosaveEnabled {
err = chromium.PutIsPasswordAutosaveEnabled(true)
if err != nil {
if errors.Is(edge.UnsupportedCapabilityError, err) {
globalApplication.warning("unsupported capability: PasswordAutosaveEnabled")
} else {
globalApplication.fatal(err.Error())
}
}
}
// We will get round to this
//if chromium.HasCapability(edge.AllowExternalDrop) {
// err := chromium.AllowExternalDrag(w.parent.options.EnableDragAndDrop)
// if err != nil {
// globalApplication.fatal(err.Error())
// }
// if w.parent.options.EnableDragAndDrop {
// chromium.MessageWithAdditionalObjectsCallback = w.processMessageWithAdditionalObjects
// }
//}
chromium.Resize()
settings, err := chromium.GetSettings()
if err != nil {
globalApplication.fatal(err.Error())
}
if settings == nil {
globalApplication.fatal("Error getting settings")
}
err = settings.PutAreDefaultContextMenusEnabled(debugMode || !w.parent.options.DefaultContextMenuDisabled)
if err != nil {
globalApplication.fatal(err.Error())
}
w.enableDevTools(settings)
if w.parent.options.Zoom > 0.0 {
chromium.PutZoomFactor(w.parent.options.Zoom)
}
err = settings.PutIsZoomControlEnabled(w.parent.options.ZoomControlEnabled)
if err != nil {
globalApplication.fatal(err.Error())
}
err = settings.PutIsStatusBarEnabled(false)
if err != nil {
globalApplication.fatal(err.Error())
}
err = settings.PutAreBrowserAcceleratorKeysEnabled(false)
if err != nil {
globalApplication.fatal(err.Error())
}
err = settings.PutIsSwipeNavigationEnabled(false)
if err != nil {
globalApplication.fatal(err.Error())
}
if debugMode && w.parent.options.OpenInspectorOnStartup {
chromium.OpenDevToolsWindow()
}
// Set background colour
w.setBackgroundColour(w.parent.options.BackgroundColour)
chromium.SetBackgroundColour(w.parent.options.BackgroundColour.Red, w.parent.options.BackgroundColour.Green, w.parent.options.BackgroundColour.Blue, w.parent.options.BackgroundColour.Alpha)
chromium.SetGlobalPermission(edge.CoreWebView2PermissionStateAllow)
chromium.AddWebResourceRequestedFilter("*", edge.COREWEBVIEW2_WEB_RESOURCE_CONTEXT_ALL)
if w.parent.options.HTML != "" {
var script string
if w.parent.options.JS != "" {
script = w.parent.options.JS
}
if w.parent.options.CSS != "" {
script += fmt.Sprintf("; addEventListener(\"DOMContentLoaded\", (event) => { document.head.appendChild(document.createElement('style')).innerHTML=\"%s\"; });", strings.ReplaceAll(w.parent.options.CSS, `"`, `\"`))
}
if script != "" {
chromium.Init(script)
}
chromium.NavigateToString(w.parent.options.HTML)
} else {
startURL, err := assetserver.GetStartURL(w.parent.options.URL)
if err != nil {
globalApplication.fatal(err.Error())
}
w.webviewNavigationCompleted = false
chromium.Navigate(startURL)
}
}
func (w *windowsWebviewWindow) fullscreenChanged(sender *edge.ICoreWebView2, _ *edge.ICoreWebView2ContainsFullScreenElementChangedEventArgs) {
isFullscreen, err := sender.GetContainsFullScreenElement()
if err != nil {
globalApplication.fatal("Fatal error in callback fullscreenChanged: " + err.Error())
}
if isFullscreen {
w.fullscreen()
} else {
w.unfullscreen()
}
}
func convertEffect(effect DragEffect) w32.DWORD {
switch effect {
case DragEffectCopy:
return w32.DROPEFFECT_COPY
case DragEffectMove:
return w32.DROPEFFECT_MOVE
case DragEffectLink:
return w32.DROPEFFECT_LINK
default:
return w32.DROPEFFECT_NONE
}
}
func (w *windowsWebviewWindow) flash(enabled bool) {
w32.FlashWindow(w.hwnd, enabled)
}
func (w *windowsWebviewWindow) navigationCompleted(sender *edge.ICoreWebView2, args *edge.ICoreWebView2NavigationCompletedEventArgs) {
// Install the runtime core
w.execJS(runtime.Core())
// EmitEvent DomReady ApplicationEvent
windowEvents <- &windowEvent{EventID: uint(events.Windows.WebViewNavigationCompleted), WindowID: w.parent.id}
if w.webviewNavigationCompleted {
// NavigationCompleted is triggered for every Load. If an application uses reloads the Hide/Show will trigger
// a flickering of the window with every reload. So we only do this once for the first NavigationCompleted.
return
}
w.webviewNavigationCompleted = true
wasFocused := w.isFocused()
// Hack to make it visible: https://github.com/MicrosoftEdge/WebView2Feedback/issues/1077#issuecomment-825375026
err := w.chromium.Hide()
if err != nil {
globalApplication.fatal(err.Error())
}
err = w.chromium.Show()
if err != nil {
globalApplication.fatal(err.Error())
}
if wasFocused {
w.focus()
}
if !w.parent.options.Hidden {
w.parent.Show()
w.update()
}
}
func (w *windowsWebviewWindow) processKeyBinding(vkey uint) bool {
globalApplication.debug("Processing key binding", "vkey", vkey)
// Get the keyboard state and convert to an accelerator
var keyState [256]byte
if !w32.GetKeyboardState(keyState[:]) {
globalApplication.error("Error getting keyboard state")
return false
}
var acc accelerator
// Check if CTRL is pressed
if keyState[w32.VK_CONTROL]&0x80 != 0 {
acc.Modifiers = append(acc.Modifiers, ControlKey)
}
// Check if ALT is pressed
if keyState[w32.VK_MENU]&0x80 != 0 {
acc.Modifiers = append(acc.Modifiers, OptionOrAltKey)
}
// Check if SHIFT is pressed
if keyState[w32.VK_SHIFT]&0x80 != 0 {
acc.Modifiers = append(acc.Modifiers, ShiftKey)
}
// Check if WIN is pressed
if keyState[w32.VK_LWIN]&0x80 != 0 || keyState[w32.VK_RWIN]&0x80 != 0 {
acc.Modifiers = append(acc.Modifiers, SuperKey)
}
if vkey != w32.VK_CONTROL && vkey != w32.VK_MENU && vkey != w32.VK_SHIFT && vkey != w32.VK_LWIN && vkey != w32.VK_RWIN {
// Convert the vkey to a string
accKey, ok := VirtualKeyCodes[vkey]
if !ok {
return false
}
acc.Key = accKey
}
accKey := acc.String()
globalApplication.debug("Processing key binding", "vkey", vkey, "acc", accKey)
// Process the key binding
if w.parent.processKeyBinding(accKey) {
return true
}
if accKey == "alt+f4" {
w32.PostMessage(w.hwnd, w32.WM_CLOSE, 0, 0)
return true
}
return false
}
func (w *windowsWebviewWindow) processMessageWithAdditionalObjects(message string, sender *edge.ICoreWebView2, args *edge.ICoreWebView2WebMessageReceivedEventArgs) {
if strings.HasPrefix(message, "FilesDropped") {
objs, err := args.GetAdditionalObjects()
if err != nil {
globalApplication.error(err.Error())
return
}
defer func() {
err = objs.Release()
if err != nil {
globalApplication.error("Error releasing objects: " + err.Error())
}
}()
count, err := objs.GetCount()
if err != nil {
globalApplication.error("cannot get count: %s", err.Error())
return
}
var filenames []string
for i := uint32(0); i < count; i++ {
_file, err := objs.GetValueAtIndex(i)
if err != nil {
globalApplication.error("cannot get value at %d : %s", i, err.Error())
return
}
file := (*edge.ICoreWebView2File)(unsafe.Pointer(_file))
// TODO: Fix this
defer file.Release()
filepath, err := file.GetPath()
if err != nil {
globalApplication.error("cannot get path for object at %d : %s", i, err.Error())
return
}
filenames = append(filenames, filepath)
}
addDragAndDropMessage(w.parent.id, filenames)
return
}
}
func (w *windowsWebviewWindow) setMaximiseButtonEnabled(enabled bool) {
w.setStyle(enabled, w32.WS_MAXIMIZEBOX)
}
func (w *windowsWebviewWindow) setMinimiseButtonEnabled(enabled bool) {
w.setStyle(enabled, w32.WS_MINIMIZEBOX)
}
func (w *windowsWebviewWindow) toggleMenuBar() {
if w.menu != nil {
if w32.GetMenu(w.hwnd) == 0 {
w32.SetMenu(w.hwnd, w.menu.menu)
} else {
w32.SetMenu(w.hwnd, 0)
}
// Get the bounds of the client area
//bounds := w32.GetClientRect(w.hwnd)
// Resize the webview
w.chromium.Resize()
// Update size of webview
w.update()
// Restore focus to the webview after toggling menu
w.focus()
}
}
func (w *windowsWebviewWindow) enableRedraw() {
w32.SendMessage(w.hwnd, w32.WM_SETREDRAW, 1, 0)
w32.RedrawWindow(w.hwnd, nil, 0, w32.RDW_ERASE|w32.RDW_FRAME|w32.RDW_INVALIDATE|w32.RDW_ALLCHILDREN)
}
func (w *windowsWebviewWindow) disableRedraw() {
w32.SendMessage(w.hwnd, w32.WM_SETREDRAW, 0, 0)
}
func (w *windowsWebviewWindow) disableRedrawWithCallback(callback func()) {
w.disableRedraw()
callback()
w.enableRedraw()
}
func NewIconFromResource(instance w32.HINSTANCE, resId uint16) (w32.HICON, error) {
var err error
var result w32.HICON
if result = w32.LoadIconWithResourceID(instance, resId); result == 0 {
err = errors.New(fmt.Sprintf("Cannot load icon from resource with id %v", resId))
}
return result, err
}
func (w *windowsWebviewWindow) setMinimiseButtonState(state ButtonState) {
switch state {
case ButtonDisabled, ButtonHidden:
w.setStyle(false, w32.WS_MINIMIZEBOX)
case ButtonEnabled:
w.setStyle(true, w32.WS_SYSMENU)
w.setStyle(true, w32.WS_MINIMIZEBOX)
}
}
func (w *windowsWebviewWindow) setMaximiseButtonState(state ButtonState) {
switch state {
case ButtonDisabled, ButtonHidden:
w.setStyle(false, w32.WS_MAXIMIZEBOX)
case ButtonEnabled:
w.setStyle(true, w32.WS_SYSMENU)
w.setStyle(true, w32.WS_MAXIMIZEBOX)
}
}
func (w *windowsWebviewWindow) setCloseButtonState(state ButtonState) {
switch state {
case ButtonEnabled:
w.setStyle(true, w32.WS_SYSMENU)
_ = w32.EnableCloseButton(w.hwnd)
case ButtonDisabled:
w.setStyle(true, w32.WS_SYSMENU)
_ = w32.DisableCloseButton(w.hwnd)
case ButtonHidden:
w.setStyle(false, w32.WS_SYSMENU)
}
}
func (w *windowsWebviewWindow) setGWLStyle(style int) {
w32.SetWindowLong(w.hwnd, w32.GWL_STYLE, uint32(style))
}
func (w *windowsWebviewWindow) isIgnoreMouseEvents() bool {
exStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)
return exStyle&w32.WS_EX_TRANSPARENT != 0
}
func (w *windowsWebviewWindow) setIgnoreMouseEvents(ignore bool) {
exStyle := w32.GetWindowLong(w.hwnd, w32.GWL_EXSTYLE)
if ignore {
exStyle |= w32.WS_EX_LAYERED | w32.WS_EX_TRANSPARENT
} else {
exStyle &^= w32.WS_EX_TRANSPARENT
}
w32.SetWindowLong(w.hwnd, w32.GWL_EXSTYLE, uint32(exStyle))
}
func (w *windowsWebviewWindow) setPadding(padding edge.Rect) {
// Skip SetPadding if window is being minimized to prevent flickering
if w.isMinimizing {
return
}
w.chromium.SetPadding(padding)
}
func (w *windowsWebviewWindow) showMenuBar() {
if w.menu != nil {
w32.SetMenu(w.hwnd, w.menu.menu)
}
}
func (w *windowsWebviewWindow) hideMenuBar() {
if w.menu != nil {
w32.SetMenu(w.hwnd, 0)
}
}
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