wayland: add support for a private gtk-shell protocol

This protocol will be used by mutter-wayland and gtk to replace
the _GTK X11 properties for DBus names/paths.

https://bugzilla.gnome.org/show_bug.cgi?id=707129

configure.ac

@@ -404,6 +404,12 @@ if test "x$enable_wayland_backend" = "xyes"; then
 #define GDK_WINDOWING_WAYLAND"
   DISABLE_ON_WAYLAND='%'
   WAYLAND_PACKAGES="wayland-client >= 1.1.90 xkbcommon >= 0.2.0 wayland-cursor"
+
+  AC_PATH_PROG([WAYLAND_SCANNER],[wayland-scanner],[no])
+  AS_IF([test "x$WAYLAND_SCANNER" = "xno"],
+    AC_MSG_ERROR([Could not find wayland-scanner in your PATH, required for parsing wayland extension protocols]))
+  AC_SUBST([WAYLAND_SCANNER])
+
   AM_CONDITIONAL(USE_WAYLAND, true)
 else
   AM_CONDITIONAL(USE_WAYLAND, false)

gdk/wayland/Makefile.am

@@ -19,7 +19,12 @@ LDADDS = $(GDK_DEP_LIBS)
 noinst_LTLIBRARIES =				\
 	libgdk-wayland.la
 
+BUILT_SOURCES = 				\
+	gtk-shell-client-protocol.h		\
+	gtk-shell-protocol.c
+
 libgdk_wayland_la_SOURCES =			\
+	$(BUILT_SOURCES)			\
 	gdkapplaunchcontext-wayland.c		\
 	gdkcursor-wayland.c			\
 	gdkdevice-wayland.c			\
@@ -43,4 +48,13 @@ libgdkwaylandinclude_HEADERS = 			\
 	gdkwaylandselection.h			\
 	gdkwaylandwindow.h
 
+%-protocol.c : protocol/%.xml
+	$(AM_V_GEN)$(WAYLAND_SCANNER) code < $< > $@
+%-server-protocol.h : protocol/%.xml
+	$(AM_V_GEN)$(WAYLAND_SCANNER) server-header < $< > $@
+%-client-protocol.h : protocol/%.xml
+	$(AM_V_GEN)$(WAYLAND_SCANNER) client-header < $< > $@
+
+EXTRA_DIST += protocol/gtk-shell.xml
+
 -include $(top_srcdir)/git.mk

gdk/wayland/gdkdisplay-wayland.c

@@ -167,6 +167,9 @@ gdk_registry_handle_global(void *data, struct wl_registry *registry, uint32_t id
   } else if (strcmp(interface, "wl_shell") == 0) {
     display_wayland->shell =
 	wl_registry_bind(display_wayland->wl_registry, id, &wl_shell_interface, 1);
+  } else if (strcmp(interface, "gtk_shell") == 0) {
+    display_wayland->gtk_shell =
+      wl_registry_bind(display_wayland->wl_registry, id, &gtk_shell_interface, 1);
   } else if (strcmp(interface, "wl_output") == 0) {
     output =
       wl_registry_bind(display_wayland->wl_registry, id, &wl_output_interface, MIN (version, 2));

gdk/wayland/gdkdisplay-wayland.h

@@ -26,6 +26,7 @@
 #include <stdint.h>
 #include <wayland-client.h>
 #include <wayland-cursor.h>
+#include "gtk-shell-client-protocol.h"
 
 #include <glib.h>
 #include <gdk/gdkkeys.h>
@@ -58,6 +59,7 @@ struct _GdkWaylandDisplay
   struct wl_compositor *compositor;
   struct wl_shm *shm;
   struct wl_shell *shell;
+  struct gtk_shell *gtk_shell;
   struct wl_input_device *input_device;
   struct wl_data_device_manager *data_device_manager;
 

gdk/wayland/gdkwindow-wayland.c

@@ -102,6 +102,7 @@ struct _GdkWindowImplWayland
 
   struct wl_surface *surface;
   struct wl_shell_surface *shell_surface;
+  struct gtk_surface *gtk_surface;
   unsigned int mapped : 1;
   GdkWindow *transient_for;
   GdkWindowTypeHint hint;
@@ -1030,6 +1031,10 @@ gdk_wayland_window_create_surface (GdkWindow *window)
   wl_surface_set_user_data(impl->surface, window);
   wl_surface_add_listener(impl->surface,
                           &surface_listener, window);
+
+  if (display_wayland->gtk_shell)
+    impl->gtk_surface = gtk_shell_get_gtk_surface (display_wayland->gtk_shell,
+						   impl->surface);
 }
 
 static void
@@ -1091,6 +1096,10 @@ gdk_wayland_window_hide_surface (GdkWindow *window,
         }
       else if (impl->surface)
         {
+	  if (impl->gtk_surface)
+	    gtk_surface_destroy(impl->gtk_surface);
+	  impl->gtk_surface = NULL;
+
           wl_surface_destroy(impl->surface);
           impl->surface = NULL;
 

gdk/wayland/protocol/gtk-shell.xml

+<protocol name="gtk">
+
+  <interface name="gtk_shell" version="1">
+    <request name="get_gtk_surface">
+      <arg name="gtk_surface" type="new_id" interface="gtk_surface"/>
+      <arg name="surface" type="object" interface="wl_surface"/>
+    </request>
+  </interface>
+
+  <interface name="gtk_surface" version="1">
+    <request name="set_dbus_properties">
+      <arg name="application_id" type="string" allow-null="true"/>
+      <arg name="app_menu_path" type="string" allow-null="true"/>
+      <arg name="menubar_path" type="string" allow-null="true"/>
+      <arg name="window_object_path" type="string" allow-null="true"/>
+      <arg name="application_object_path" type="string" allow-null="true"/>
+      <arg name="unique_bus_name" type="string" allow-null="true"/>
+    </request>
+  </interface>
+
+</protocol>