[v3 linux] implement missing functions

v3/pkg/application/application_linux.go

@@ -95,6 +95,11 @@ func (m *linuxApp) destroy() {
 	appDestroy(m.application)
 }
 
+func (m *linuxApp) isOnMainThread() bool {
+	// FIXME: How do we detect this properly?
+	return false
+}
+
 // register our window to our parent mapping
 func (m *linuxApp) registerWindow(window pointer, id uint) {
 	m.windowsLock.Lock()

v3/pkg/application/linux_cgo.go

@@ -8,6 +8,7 @@ import (
 	"unsafe"
 
 	"github.com/wailsapp/wails/v2/pkg/assetserver/webview"
+	"github.com/wailsapp/wails/v3/pkg/events"
 )
 
 /*
@@ -42,8 +43,14 @@ static void dispatchOnMainThread(unsigned int id) {
     g_idle_add((GSourceFunc)dispatchCallback, (gpointer)args);
 }
 
+typedef struct WindowEvent {
+    uint id;
+    uint event;
+} WindowEvent;
+
 // exported below
 void activateLinux(gpointer data);
+extern void emit(WindowEvent* data);
 void handleClick(void*);
 extern gboolean onButtonEvent(GtkWidget *widget, GdkEventButton *event, gpointer user_data);
 extern void onDragNDrop(
@@ -112,7 +119,6 @@ typedef struct Screen {
 static int GetNumScreens(){
     return 0;
 }
-
 */
 import "C"
 
@@ -669,17 +675,22 @@ func windowSetURL(webview pointer, uri string) {
 	C.free(unsafe.Pointer(target))
 }
 
-func windowSetupSignalHandlers(windowId uint, window, webview pointer, hideOnClose bool) {
+//export emit
+func emit(we *C.WindowEvent) {
+	window := globalApplication.getWindowForID(uint(we.id))
+	if window != nil {
+		window.emit(events.WindowEventType(we.event))
+	}
+}
+
+func windowSetupSignalHandlers(windowId uint, window, webview pointer, emit func(e events.WindowEventType)) {
 	event := C.CString("delete-event")
 	defer C.free(unsafe.Pointer(event))
-
-	// Window close handler
-	if hideOnClose {
-		C.signal_connect((*C.GtkWidget)(window), event, C.gtk_widget_hide_on_delete, C.NULL)
-	} else {
-		//FIXME: what event should be emitted?
-		//		C.signal_connect((*C.GtkWidget)(window), event, C.close_button_pressed, w.parent.id)
+	wEvent := C.WindowEvent{
+		id:    C.uint(windowId),
+		event: C.uint(events.Common.WindowClosing),
 	}
+	C.signal_connect((*C.GtkWidget)(window), event, C.emit, unsafe.Pointer(&wEvent))
 
 	/*
 		event = C.CString("load-changed")

v3/pkg/application/linux_purego.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/ebitengine/purego"
 	"github.com/wailsapp/wails/v2/pkg/assetserver/webview"
+	"github.com/wailsapp/wails/v3/pkg/events"
 )
 
 type windowPointer uintptr
@@ -74,8 +75,9 @@ var (
 
 const (
 	// TODO: map distro => so filename - with fallback?
-	gtk3 = "libgtk-3.so.0"
-	gtk4 = "libgtk-4.so.1"
+	gtk3    = "libgtk-3.so.0"
+	gtk4    = "libgtk-4.so.1"
+	webkit4 = "libwebkit2gtk-4.1.so.0"
 )
 
 var (
@@ -211,7 +213,6 @@ func init() {
 	}
 	version = 3
 
-	var webkit4 string = "libwebkit2gtk-4.1.so"
 	webkit, err = purego.Dlopen(webkit4, purego.RTLD_NOW|purego.RTLD_GLOBAL)
 	if err != nil {
 		panic(err)
@@ -858,23 +859,11 @@ func windowSetURL(webview pointer, uri string) {
 	webkitWebViewLoadUri(webview, uri)
 }
 
-func windowSetupSignalHandlers(windowId uint, window, webview pointer, hideOnClose bool) {
-	// Window close handler
-	if hideOnClose {
-		handleDelete := purego.NewCallback(func(pointer) {
-			// FIXME: I think this should be the WebviewWindow
-			//w.close()
-			if !hideOnClose {
-				fmt.Println("Need to do more!")
-			}
-		})
-
-		gSignalConnectData(window, "delete-event", handleDelete, 0, false, 0)
-
-	} else {
-		//FIXME: what event should be emitted?
-		//		C.signal_connect((*C.GtkWidget)(window), event, C.close_button_pressed, w.parent.id)
-	}
+func windowSetupSignalHandlers(windowId uint, window, webview pointer, emit func(e events.WindowEventType)) {
+	handleDelete := purego.NewCallback(func(pointer) {
+		emit(events.Common.WindowClosing)
+	})
+	gSignalConnectData(window, "delete-event", handleDelete, 0, false, 0)
 
 	/*
 		event = C.CString("load-changed")

v3/pkg/application/webview_window_linux.go

@@ -53,7 +53,10 @@ func (w *linuxWebviewWindow) enableDND() {
 }
 
 func (w *linuxWebviewWindow) connectSignals() {
-	windowSetupSignalHandlers(w.parent.id, w.window, w.webview, w.parent.options.HideOnClose)
+	cb := func(e events.WindowEventType) {
+		w.parent.emit(e)
+	}
+	windowSetupSignalHandlers(w.parent.id, w.window, w.webview, cb)
 }
 
 func (w *linuxWebviewWindow) openContextMenu(menu *Menu, data *ContextMenuData) {
@@ -193,9 +196,6 @@ func (w *linuxWebviewWindow) windowZoom() {
 
 func (w *linuxWebviewWindow) close() {
 	windowClose(w.window)
-	if !w.parent.options.HideOnClose {
-		globalApplication.deleteWindowByID(w.parent.id)
-	}
 }
 
 func (w *linuxWebviewWindow) zoomIn() {
@@ -490,3 +490,8 @@ func (w *linuxWebviewWindow) startResize(border string) error {
 func (w *linuxWebviewWindow) nativeWindowHandle() uintptr {
 	return uintptr(w.window)
 }
+
+func (w *linuxWebviewWindow) print() error {
+	w.execJS("window.print();")
+	return nil
+}