mirror of
https://github.com/wailsapp/wails.git
synced 2025-05-03 06:20:48 +08:00
432 lines
9.7 KiB
Go
432 lines
9.7 KiB
Go
//go:build windows
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// +build windows
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package windows
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"runtime"
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"strconv"
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"strings"
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"text/template"
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"github.com/leaanthony/go-webview2/pkg/edge"
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"github.com/leaanthony/winc"
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"github.com/leaanthony/winc/w32"
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"github.com/wailsapp/wails/v2/internal/binding"
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"github.com/wailsapp/wails/v2/internal/frontend"
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"github.com/wailsapp/wails/v2/internal/frontend/assetserver"
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"github.com/wailsapp/wails/v2/internal/logger"
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"github.com/wailsapp/wails/v2/pkg/options"
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)
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type Frontend struct {
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// Context
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ctx context.Context
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frontendOptions *options.App
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logger *logger.Logger
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chromium *edge.Chromium
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debug bool
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// Assets
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assets *assetserver.DesktopAssetServer
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startURL string
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// main window handle
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mainWindow *Window
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minWidth, minHeight, maxWidth, maxHeight int
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bindings *binding.Bindings
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dispatcher frontend.Dispatcher
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servingFromDisk bool
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}
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func NewFrontend(ctx context.Context, appoptions *options.App, myLogger *logger.Logger, appBindings *binding.Bindings, dispatcher frontend.Dispatcher) *Frontend {
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result := &Frontend{
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frontendOptions: appoptions,
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logger: myLogger,
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bindings: appBindings,
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dispatcher: dispatcher,
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ctx: ctx,
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minHeight: appoptions.MinHeight,
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minWidth: appoptions.MinWidth,
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maxHeight: appoptions.MaxHeight,
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maxWidth: appoptions.MaxWidth,
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startURL: "file://wails/",
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}
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bindingsJSON, err := appBindings.ToJSON()
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if err != nil {
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log.Fatal(err)
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}
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_devServerURL := ctx.Value("devserverurl")
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if _devServerURL != nil {
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devServerURL := _devServerURL.(string)
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if len(devServerURL) > 0 && devServerURL != "http://localhost:34115" {
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result.startURL = devServerURL
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return result
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}
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}
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// Check if we have been given a directory to serve assets from.
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// If so, this means we are in dev mode and are serving assets off disk.
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// We indicate this through the `servingFromDisk` flag to ensure requests
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// aren't cached by WebView2 in dev mode
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_assetdir := ctx.Value("assetdir")
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if _assetdir != nil {
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result.servingFromDisk = true
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}
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assets, err := assetserver.NewDesktopAssetServer(ctx, appoptions.Assets, bindingsJSON)
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if err != nil {
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log.Fatal(err)
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}
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result.assets = assets
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return result
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}
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func (f *Frontend) WindowReload() {
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f.ExecJS("runtime.WindowReload();")
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}
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func (f *Frontend) Run(ctx context.Context) error {
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f.ctx = context.WithValue(ctx, "frontend", f)
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mainWindow := NewWindow(nil, f.frontendOptions)
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f.mainWindow = mainWindow
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var _debug = ctx.Value("debug")
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if _debug != nil {
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f.debug = _debug.(bool)
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}
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f.WindowCenter()
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f.setupChromium()
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mainWindow.OnSize().Bind(func(arg *winc.Event) {
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f.chromium.Resize()
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})
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mainWindow.OnClose().Bind(func(arg *winc.Event) {
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if f.frontendOptions.HideWindowOnClose {
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f.WindowHide()
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} else {
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f.Quit()
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}
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})
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go func() {
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if f.frontendOptions.OnStartup != nil {
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f.frontendOptions.OnStartup(f.ctx)
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}
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}()
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if f.frontendOptions.Fullscreen {
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mainWindow.Fullscreen()
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}
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mainWindow.Run()
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mainWindow.Close()
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return nil
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}
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func (f *Frontend) WindowCenter() {
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runtime.LockOSThread()
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f.mainWindow.Center()
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}
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func (f *Frontend) WindowSetPos(x, y int) {
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runtime.LockOSThread()
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f.mainWindow.SetPos(x, y)
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}
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func (f *Frontend) WindowGetPos() (int, int) {
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runtime.LockOSThread()
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return f.mainWindow.Pos()
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}
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func (f *Frontend) WindowSetSize(width, height int) {
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runtime.LockOSThread()
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f.mainWindow.SetSize(width, height)
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}
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func (f *Frontend) WindowGetSize() (int, int) {
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runtime.LockOSThread()
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return f.mainWindow.Size()
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}
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func (f *Frontend) WindowSetTitle(title string) {
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runtime.LockOSThread()
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f.mainWindow.SetText(title)
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}
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func (f *Frontend) WindowFullscreen() {
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runtime.LockOSThread()
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f.mainWindow.SetMaxSize(0, 0)
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f.mainWindow.SetMinSize(0, 0)
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f.mainWindow.Fullscreen()
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}
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func (f *Frontend) WindowUnFullscreen() {
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runtime.LockOSThread()
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f.mainWindow.UnFullscreen()
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f.mainWindow.SetMaxSize(f.maxWidth, f.maxHeight)
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f.mainWindow.SetMinSize(f.minWidth, f.minHeight)
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}
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func (f *Frontend) WindowShow() {
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runtime.LockOSThread()
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f.mainWindow.Show()
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}
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func (f *Frontend) WindowHide() {
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runtime.LockOSThread()
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f.mainWindow.Hide()
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}
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func (f *Frontend) WindowMaximise() {
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runtime.LockOSThread()
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f.mainWindow.Maximise()
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}
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func (f *Frontend) WindowUnmaximise() {
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runtime.LockOSThread()
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f.mainWindow.Restore()
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}
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func (f *Frontend) WindowMinimise() {
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runtime.LockOSThread()
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f.mainWindow.Minimise()
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}
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func (f *Frontend) WindowUnminimise() {
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runtime.LockOSThread()
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f.mainWindow.Restore()
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}
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func (f *Frontend) WindowSetMinSize(width int, height int) {
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runtime.LockOSThread()
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f.minWidth = width
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f.minHeight = height
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f.mainWindow.SetMinSize(width, height)
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}
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func (f *Frontend) WindowSetMaxSize(width int, height int) {
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runtime.LockOSThread()
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f.maxWidth = width
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f.maxHeight = height
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f.mainWindow.SetMaxSize(width, height)
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}
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func (f *Frontend) WindowSetRGBA(col *options.RGBA) {
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runtime.LockOSThread()
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if col == nil {
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return
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}
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f.mainWindow.Dispatch(func() {
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controller := f.chromium.GetController()
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controller2 := controller.GetICoreWebView2Controller2()
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backgroundCol := edge.COREWEBVIEW2_COLOR{
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A: col.A,
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R: col.R,
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G: col.G,
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B: col.B,
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}
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// Webview2 only has 0 and 255 as valid values.
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if backgroundCol.A > 0 && backgroundCol.A < 255 {
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backgroundCol.A = 255
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}
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if f.frontendOptions.Windows != nil && f.frontendOptions.Windows.WebviewIsTransparent {
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backgroundCol.A = 0
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}
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err := controller2.PutDefaultBackgroundColor(backgroundCol)
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if err != nil {
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log.Fatal(err)
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}
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})
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}
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func (f *Frontend) Quit() {
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winc.Exit()
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}
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func (f *Frontend) setupChromium() {
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chromium := edge.NewChromium()
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f.chromium = chromium
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chromium.MessageCallback = f.processMessage
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chromium.WebResourceRequestedCallback = f.processRequest
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chromium.NavigationCompletedCallback = f.navigationCompleted
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chromium.AcceleratorKeyCallback = func(vkey uint) bool {
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w32.PostMessage(f.mainWindow.Handle(), w32.WM_KEYDOWN, uintptr(vkey), 0)
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return false
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}
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chromium.Embed(f.mainWindow.Handle())
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chromium.Resize()
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settings, err := chromium.GetSettings()
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutAreDefaultContextMenusEnabled(f.debug)
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutAreDevToolsEnabled(f.debug)
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutIsZoomControlEnabled(false)
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutIsStatusBarEnabled(false)
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutAreBrowserAcceleratorKeysEnabled(false)
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if err != nil {
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log.Fatal(err)
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}
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err = settings.PutIsSwipeNavigationEnabled(false)
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if err != nil {
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log.Fatal(err)
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}
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// Set background colour
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f.WindowSetRGBA(f.frontendOptions.RGBA)
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chromium.SetGlobalPermission(edge.CoreWebView2PermissionStateAllow)
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chromium.AddWebResourceRequestedFilter("*", edge.COREWEBVIEW2_WEB_RESOURCE_CONTEXT_ALL)
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chromium.Navigate(f.startURL)
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}
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type EventNotify struct {
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Name string `json:"name"`
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Data []interface{} `json:"data"`
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}
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func (f *Frontend) Notify(name string, data ...interface{}) {
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notification := EventNotify{
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Name: name,
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Data: data,
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}
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payload, err := json.Marshal(notification)
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if err != nil {
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f.logger.Error(err.Error())
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return
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}
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f.ExecJS(`window.wails.EventsNotify('` + template.JSEscapeString(string(payload)) + `');`)
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}
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func (f *Frontend) processRequest(req *edge.ICoreWebView2WebResourceRequest, args *edge.ICoreWebView2WebResourceRequestedEventArgs) {
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//Get the request
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uri, _ := req.GetUri()
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// Translate URI
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uri = strings.TrimPrefix(uri, "file://wails")
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if !strings.HasPrefix(uri, "/") {
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return
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}
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// Load file from asset store
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content, mimeType, err := f.assets.Load(uri)
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if err != nil {
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return
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}
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env := f.chromium.Environment()
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headers := "Content-Type: " + mimeType
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if f.servingFromDisk {
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headers += "\nPragma: no-cache"
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}
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response, err := env.CreateWebResourceResponse(content, 200, "OK", headers)
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if err != nil {
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return
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}
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// Send response back
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err = args.PutResponse(response)
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if err != nil {
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return
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}
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return
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}
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func (f *Frontend) processMessage(message string) {
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if message == "drag" {
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if !f.mainWindow.IsFullScreen() {
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err := f.startDrag()
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if err != nil {
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f.logger.Error(err.Error())
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}
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}
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return
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}
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result, err := f.dispatcher.ProcessMessage(message, f)
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if err != nil {
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f.logger.Error(err.Error())
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f.Callback(result)
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return
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}
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if result == "" {
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return
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}
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switch result[0] {
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case 'c':
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// Callback from a method call
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f.Callback(result[1:])
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default:
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f.logger.Info("Unknown message returned from dispatcher: %+v", result)
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}
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}
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func (f *Frontend) Callback(message string) {
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f.mainWindow.Dispatch(func() {
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f.chromium.Eval(`window.wails.Callback(` + strconv.Quote(message) + `);`)
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})
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}
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func (f *Frontend) startDrag() error {
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if !w32.ReleaseCapture() {
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return fmt.Errorf("unable to release mouse capture")
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}
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w32.SendMessage(f.mainWindow.Handle(), w32.WM_NCLBUTTONDOWN, w32.HTCAPTION, 0)
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return nil
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}
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func (f *Frontend) ExecJS(js string) {
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f.mainWindow.Dispatch(func() {
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f.chromium.Eval(js)
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})
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}
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func (f *Frontend) navigationCompleted(sender *edge.ICoreWebView2, args *edge.ICoreWebView2NavigationCompletedEventArgs) {
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if f.frontendOptions.OnDomReady != nil {
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go f.frontendOptions.OnDomReady(f.ctx)
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}
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// If you want to start hidden, return
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if f.frontendOptions.StartHidden {
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return
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}
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// Hack to make it visible: https://github.com/MicrosoftEdge/WebView2Feedback/issues/1077#issuecomment-825375026
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err := f.chromium.Hide()
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if err != nil {
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log.Fatal(err)
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}
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err = f.chromium.Show()
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if err != nil {
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log.Fatal(err)
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}
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f.mainWindow.Show()
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}
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