1 files changed, 113 insertions, 0 deletions
diff --git a/libtopmenu-client/topmenu-client.c b/libtopmenu-client/topmenu-client.c
new file mode 100644
index 0000000..63e27bc
--- /dev/null
+++ b/libtopmenu-client/topmenu-client.c
@@ -0,0 +1,113 @@
+#include <X11/Xatom.h>
+#include <gdk/gdkx.h>
+
+#include "../global.h"
+
+#include "topmenu-client.h"
+
+#define OBJECT_DATA_KEY_PLUG "topmenu-plug"
+
+static gboolean handle_plug_delete(GtkPlug *plug, GdkEvent *event, GdkWindow *window)
+{
+	return TRUE; // Prevent deletion of plug window
+}
+
+static gboolean handle_widget_button_event(GtkWidget *widget, GdkEvent *event, GtkPlug *plug)
+{
+	if (event->type != GDK_BUTTON_PRESS && event->type != GDK_BUTTON_RELEASE) {
+		return FALSE;
+	}
+	if (event->button.button == 1) {
+		return FALSE;
+	}
+
+	GdkWindow *socket = gtk_plug_get_socket_window(plug);
+	if (socket) {
+		GdkScreen *screen = gdk_window_get_screen(socket);
+		GdkWindow *root = gdk_screen_get_root_window(screen);
+		Display *dpy = GDK_WINDOW_XDISPLAY(socket);
+		Window xwin = GDK_WINDOW_XWINDOW(socket);
+
+		if (event->type == GDK_BUTTON_PRESS) {
+			gdk_display_pointer_ungrab(gtk_widget_get_display(widget),
+									   GDK_CURRENT_TIME);
+		}
+
+		XEvent e;
+		long mask = event->type == GDK_BUTTON_PRESS ? ButtonPressMask : ButtonReleaseMask;
+		e.type = event->type == GDK_BUTTON_PRESS ? ButtonPress : ButtonRelease;
+		e.xbutton.window = xwin;
+		e.xbutton.display = dpy;
+		e.xbutton.root = GDK_WINDOW_XWINDOW(root);
+		e.xbutton.time = event->button.time;
+		e.xbutton.button = event->button.button;
+		e.xbutton.state = event->button.state;
+		e.xbutton.x = event->button.x;
+		e.xbutton.y = event->button.y;
+		e.xbutton.x_root = event->button.x_root;
+		e.xbutton.y_root = event->button.y_root;
+		e.xbutton.same_screen = True;
+
+		gdk_error_trap_push();
+		XSendEvent(dpy, xwin, True, mask, &e);
+		g_debug("Forwarding button %d %s event to 0x%lx",
+				e.xbutton.button,
+				event->type == GDK_BUTTON_PRESS ? "press" : "release",
+				xwin);
+		gdk_flush();
+		gdk_error_trap_pop();
+
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+void topmenu_client_connect_window_widget(GdkWindow *window, GtkWidget *widget)
+{
+	Display *display = GDK_WINDOW_XDISPLAY(window);
+
+	if (g_object_get_data(G_OBJECT(window), OBJECT_DATA_KEY_PLUG)) {
+		topmenu_client_disconnect_window(window);
+	}
+
+	Window xwin = GDK_WINDOW_XID(window);
+	GtkPlug *plug = GTK_PLUG(gtk_plug_new(0));
+	gtk_container_add(GTK_CONTAINER(plug), widget);
+	g_signal_connect_object(plug, "delete-event",
+	                        G_CALLBACK(handle_plug_delete), window, 0);
+	g_signal_connect_object(widget, "button-press-event",
+		                        G_CALLBACK(handle_widget_button_event), plug, 0);
+	g_signal_connect_object(widget, "button-release-event",
+		                        G_CALLBACK(handle_widget_button_event), plug, 0);
+	gtk_widget_show(GTK_WIDGET(plug));
+
+	Window plug_xwin = gtk_plug_get_id(plug);
+
+	Atom atom = XInternAtom(display, ATOM_TOPMENU_WINDOW, False);
+
+	XChangeProperty(display, xwin, atom,
+	                XA_WINDOW, 32, PropModeReplace,
+	                (unsigned char*)&plug_xwin, 1);
+
+	g_object_set_data_full(G_OBJECT(window), OBJECT_DATA_KEY_PLUG, plug, (GDestroyNotify)&gtk_widget_destroy);
+}
+
+void topmenu_client_disconnect_window(GdkWindow *window)
+{
+	Display *display = GDK_WINDOW_XDISPLAY(window);
+
+	gpointer window_data = g_object_steal_data(G_OBJECT(window), OBJECT_DATA_KEY_PLUG);
+	g_return_if_fail(window_data);
+
+	Window xwin = GDK_WINDOW_XID(window);
+
+	GtkPlug *plug = GTK_PLUG(window_data);
+	g_return_if_fail(plug);
+
+	Atom atom = XInternAtom(display, ATOM_TOPMENU_WINDOW, False);
+
+	XDeleteProperty(display, xwin, atom);
+
+	g_object_unref(plug);
+}