Make ShellXFixesCursor work under wayland

Replace ClutterX11 with GdkX11 + Mutter, so that it works when
Clutter is not using the X11 backend.

FIXME: doesn't work...

js/ui/magnifier.js

@@ -53,7 +53,7 @@ const Magnifier = new Lang.Class({
         this._zoomRegions = [];
 
         // Create small clutter tree for the magnified mouse.
-        let xfixesCursor = Shell.XFixesCursor.get_for_stage(global.stage);
+        let xfixesCursor = Shell.XFixesCursor.get_for_screen(global.screen);
         this._mouseSprite = new Clutter.Texture();
         xfixesCursor.update_texture_image(this._mouseSprite);
         this._cursorRoot = new Clutter.Actor();
@@ -83,7 +83,7 @@ const Magnifier = new Lang.Class({
      * Show the system mouse pointer.
      */
     showSystemCursor: function() {
-        this._xfixesCursor.show();
+        global.stage.show_cursor();
     },
 
     /**
@@ -91,7 +91,7 @@ const Magnifier = new Lang.Class({
      * Hide the system mouse pointer.
      */
     hideSystemCursor: function() {
-        this._xfixesCursor.hide();
+        global.stage.hide_cursor();
     },
 
     /**
@@ -112,7 +112,7 @@ const Magnifier = new Lang.Class({
         // Make sure system mouse pointer is shown when all zoom regions are
         // invisible.
         if (!activate)
-            this._xfixesCursor.show();
+            global.stage.show_cursor();
 
         // Notify interested parties of this change
         this.emit('active-changed', activate);

src/gnome-shell-plugin.c

@@ -314,38 +314,6 @@ gnome_shell_plugin_kill_switch_workspace (MetaPlugin         *plugin)
   _shell_wm_kill_switch_workspace (get_shell_wm());
 }
 
-static gboolean
-ignore_crossing_event (MetaPlugin   *plugin,
-                       XIEnterEvent *enter_event)
-{
-  MetaScreen *screen = meta_plugin_get_screen (plugin);
-  ClutterStage *stage = CLUTTER_STAGE (meta_get_stage_for_screen (screen));
-
-  if (enter_event->event == clutter_x11_get_stage_window (stage))
-    {
-      /* If the pointer enters a child of the stage window (eg, a
-       * trayicon), we want to consider it to still be in the stage,
-       * so don't let Clutter see the event.
-       */
-      if (enter_event->detail == XINotifyInferior)
-        return TRUE;
-
-      /* If the pointer is grabbed by a window it is not currently in,
-       * filter that out as well. In particular, if a trayicon grabs
-       * the pointer after a click on its label, we don't want to hide
-       * the message tray. Filtering out this event will leave Clutter
-       * out of sync, but that happens fairly often with grabs, and we
-       * can work around it. (Eg, shell_global_sync_pointer().)
-       */
-      if (enter_event->mode == XINotifyGrab &&
-          (enter_event->detail == XINotifyNonlinear ||
-           enter_event->detail == XINotifyNonlinearVirtual))
-        return TRUE;
-    }
-
-  return FALSE;
-}
-
 static gboolean
 gnome_shell_plugin_xevent_filter (MetaPlugin *plugin,
                                   XEvent     *xev)
@@ -371,25 +339,10 @@ gnome_shell_plugin_xevent_filter (MetaPlugin *plugin,
     }
 #endif
 
-  /* Make sure that Clutter doesn't see certain focus change events,
-   * so that when we're moving into something like a tray icon, we
-   * don't unfocus the container. */
-  if (xev->type == GenericEvent &&
-      xev->xcookie.extension == meta_display_get_xinput_opcode (display))
-    {
-      XIEvent *input_event = (XIEvent *) xev->xcookie.data;
-      if ((input_event->evtype == XI_Enter || input_event->evtype == XI_Leave) &&
-          ignore_crossing_event (plugin, (XIEnterEvent *) input_event))
-        return TRUE;
-    }
-
   /*
    * Pass the event to shell-global
    */
-  if (_shell_global_check_xdnd_event (shell_plugin->global, xev))
-    return TRUE;
-
-  return clutter_x11_handle_event (xev) != CLUTTER_X11_FILTER_CONTINUE;
+  return _shell_global_check_xdnd_event (shell_plugin->global, xev);
 }
 
 static gboolean

src/main.c

@@ -22,6 +22,7 @@
 #include <atk-bridge.h>
 #include <telepathy-glib/debug.h>
 #include <telepathy-glib/debug-sender.h>
+#include <meta/util.h>
 
 #include "shell-global.h"
 #include "shell-global-private.h"
@@ -41,6 +42,7 @@ extern GType gnome_shell_plugin_get_type (void);
 
 static gboolean is_gdm_mode = FALSE;
 static char *session_mode = NULL;
+static gboolean is_display_server = FALSE;
 
 #define DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER 1
 #define DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER 4
@@ -347,6 +349,12 @@ print_version (const gchar    *option_name,
 }
 
 GOptionEntry gnome_shell_options[] = {
+  {
+    "display-server", 0, 0, G_OPTION_ARG_NONE,
+    &is_display_server,
+    N_("Run as a display server"),
+    NULL,
+  },
   {
     "version", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK,
     print_version,
@@ -396,6 +404,8 @@ main (int argc, char **argv)
 
   g_option_context_free (ctx);
 
+  meta_set_is_display_server (is_display_server);
+
   meta_plugin_manager_set_plugin_type (gnome_shell_plugin_get_type ());
 
   meta_set_wm_name (WM_NAME);

src/shell-global.c

@@ -930,9 +930,34 @@ _shell_global_set_plugin (ShellGlobal *global,
                                                meta_screen_get_screen_number (global->meta_screen));
 
   global->stage = CLUTTER_STAGE (meta_get_stage_for_screen (global->meta_screen));
+  if (meta_is_display_server ())
+    {
+      /* When Mutter is acting as its own display server then the
+         stage does not have a window. Instead we'll just create a
+         dummy window that might make some things blunder along but
+         will probably just leave most things broken. It might be
+         possible to fix this to make the fake window be the same size
+         as the stage window would be and make it more useful. */
+
+      GdkWindowAttr attributes;
+
+      attributes.wclass = GDK_INPUT_OUTPUT;
+      attributes.width = 100;
+      attributes.height = 100;
+      attributes.window_type = GDK_WINDOW_TOPLEVEL;
+
+      global->stage_gdk_window = gdk_window_new (NULL,
+                                                 &attributes,
+                                                 0 /* attributes_mask */);
+      global->stage_xwindow = gdk_x11_window_get_xid (global->stage_gdk_window);
+    }
+  else
+    {
       global->stage_xwindow = clutter_x11_get_stage_window (global->stage);
-  global->stage_gdk_window = gdk_x11_window_foreign_new_for_display (global->gdk_display,
+      global->stage_gdk_window =
+        gdk_x11_window_foreign_new_for_display (global->gdk_display,
                                                 global->stage_xwindow);
+    }
 
   g_signal_connect (global->stage, "notify::width",
                     G_CALLBACK (global_stage_notify_width), global);
@@ -1240,9 +1265,12 @@ void shell_global_init_xdnd (ShellGlobal *global)
                    gdk_x11_get_xatom_by_name ("XdndAware"), XA_ATOM,
                    32, PropModeReplace, (const unsigned char *)&xdnd_version, 1);
 
+  /* There is no overlay window when running as a display server */
+  if (output_window)
     XChangeProperty (global->xdisplay, output_window,
                      gdk_x11_get_xatom_by_name ("XdndProxy"), XA_WINDOW,
-                   32, PropModeReplace, (const unsigned char *)&global->stage_xwindow, 1);
+                     32, PropModeReplace,
+                     (const unsigned char *)&global->stage_xwindow, 1);
 
   /*
    * XdndProxy is additionally set on the proxy window as verification that the

src/shell-xfixes-cursor.c

@@ -4,8 +4,11 @@
 
 #include "shell-xfixes-cursor.h"
 
-#include <clutter/x11/clutter-x11.h>
+#include <gdk/gdkx.h>
 #include <X11/extensions/Xfixes.h>
+#include <meta/display.h>
+#include <meta/screen.h>
+#include <meta/util.h>
 
 /**
  * SECTION:shell-xfixes-cursor
@@ -24,7 +27,7 @@ struct _ShellXFixesCursorClass
 struct _ShellXFixesCursor {
   GObject parent;
 
-  ClutterStage *stage;
+  MetaScreen *screen;
 
   gboolean have_xfixes;
   int xfixes_event_base;
@@ -36,17 +39,14 @@ struct _ShellXFixesCursor {
   int cursor_hot_y;
 };
 
-static void xfixes_cursor_show        (ShellXFixesCursor *xfixes_cursor);
-static void xfixes_cursor_hide        (ShellXFixesCursor *xfixes_cursor);
-
-static void xfixes_cursor_set_stage   (ShellXFixesCursor *xfixes_cursor,
-                                       ClutterStage  *stage);
+static void xfixes_cursor_set_screen   (ShellXFixesCursor *xfixes_cursor,
+                                        MetaScreen        *screen);
 
 static void xfixes_cursor_reset_image (ShellXFixesCursor *xfixes_cursor);
 
 enum {
   PROP_0,
-  PROP_STAGE,
+  PROP_SCREEN,
 };
 
 G_DEFINE_TYPE(ShellXFixesCursor, shell_xfixes_cursor, G_TYPE_OBJECT);
@@ -71,31 +71,22 @@ shell_xfixes_cursor_finalize (GObject  *object)
 {
   ShellXFixesCursor *xfixes_cursor = SHELL_XFIXES_CURSOR (object);
 
-  // Make sure the system cursor is showing before leaving the stage.
-  xfixes_cursor_show (xfixes_cursor);
-  xfixes_cursor_set_stage (xfixes_cursor, NULL);
+  xfixes_cursor_set_screen (xfixes_cursor, NULL);
   if (xfixes_cursor->cursor_sprite != NULL)
     cogl_handle_unref (xfixes_cursor->cursor_sprite);
 
   G_OBJECT_CLASS (shell_xfixes_cursor_parent_class)->finalize (object);
 }
 
-static void
-xfixes_cursor_on_stage_destroy (ClutterActor  *actor,
-                                ShellXFixesCursor *xfixes_cursor)
-{
-  xfixes_cursor_set_stage (xfixes_cursor, NULL);
-}
-
-static ClutterX11FilterReturn
+static GdkFilterReturn
 xfixes_cursor_event_filter (XEvent     *xev,
-                            ClutterEvent  *cev,
+                            GdkEvent   *ev,
                             gpointer    data)
 {
   ShellXFixesCursor *xfixes_cursor = data;
 
-  if (xev->xany.window != clutter_x11_get_stage_window (xfixes_cursor->stage))
-    return CLUTTER_X11_FILTER_CONTINUE;
+  if (xev->xany.window != meta_get_overlay_window (xfixes_cursor->screen))
+    return GDK_FILTER_CONTINUE;
 
   if (xev->xany.type == xfixes_cursor->xfixes_event_base + XFixesCursorNotify)
     {
@@ -103,93 +94,43 @@ xfixes_cursor_event_filter (XEvent        *xev,
       if (notify_event->subtype == XFixesDisplayCursorNotify)
         xfixes_cursor_reset_image (xfixes_cursor);
     }
-    return CLUTTER_X11_FILTER_CONTINUE;
+
+  return GDK_FILTER_CONTINUE;
 }
 
 static void
-xfixes_cursor_set_stage (ShellXFixesCursor *xfixes_cursor,
-                         ClutterStage  *stage)
+xfixes_cursor_set_screen (ShellXFixesCursor *xfixes_cursor,
+                          MetaScreen        *screen)
 {
-  if (xfixes_cursor->stage == stage)
+  if (xfixes_cursor->screen == screen)
     return;
 
-  if (xfixes_cursor->stage)
+  if (xfixes_cursor->screen)
     {
-      g_signal_handlers_disconnect_by_func (xfixes_cursor->stage,
-                                            (void *)xfixes_cursor_on_stage_destroy,
-                                            xfixes_cursor);
-
-      clutter_x11_remove_filter (xfixes_cursor_event_filter, xfixes_cursor);
+      gdk_window_remove_filter (NULL, (GdkFilterFunc)xfixes_cursor_event_filter, xfixes_cursor);
     }
-  xfixes_cursor->stage = stage;
-  if (xfixes_cursor->stage)
+
+  xfixes_cursor->screen = screen;
+  if (xfixes_cursor->screen)
     {
       int error_base;
 
-      xfixes_cursor->stage = stage;
-      g_signal_connect (xfixes_cursor->stage, "destroy",
-                        G_CALLBACK (xfixes_cursor_on_stage_destroy), xfixes_cursor);
+      gdk_window_add_filter (NULL, (GdkFilterFunc)xfixes_cursor_event_filter, xfixes_cursor);
 
-      clutter_x11_add_filter (xfixes_cursor_event_filter, xfixes_cursor);
-
-      xfixes_cursor->have_xfixes = XFixesQueryExtension (clutter_x11_get_default_display (),
+      xfixes_cursor->have_xfixes = XFixesQueryExtension (gdk_x11_get_default_xdisplay (),
                                                          &xfixes_cursor->xfixes_event_base,
                                                          &error_base);
-      if (xfixes_cursor->have_xfixes)
-        XFixesSelectCursorInput (clutter_x11_get_default_display (),
-                                 clutter_x11_get_stage_window (stage),
+
+      /* FIXME: this needs to be moved down to mutter as a whole */
+      if (xfixes_cursor->have_xfixes && !meta_is_display_server())
+        XFixesSelectCursorInput (gdk_x11_get_default_xdisplay (),
+                                 meta_get_overlay_window (screen),
                                  XFixesDisplayCursorNotifyMask);
 
       xfixes_cursor_reset_image (xfixes_cursor);
     }
 }
 
-static void
-xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor)
-{
-  int minor, major;
-  Display *xdisplay;
-  Window xwindow;
-
-  if (xfixes_cursor->is_showing == TRUE)
-      return;
-
-  if (!xfixes_cursor->have_xfixes || !xfixes_cursor->stage)
-      return;
-
-  xdisplay = clutter_x11_get_default_display ();
-  xwindow = clutter_x11_get_stage_window (xfixes_cursor->stage);
-  XFixesQueryVersion (xdisplay, &major, &minor);
-  if (major >= 4)
-    {
-      XFixesShowCursor (xdisplay, xwindow);
-      xfixes_cursor->is_showing = TRUE;
-    }
-}
-
-static void
-xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor)
-{
-  int minor, major;
-  Display *xdisplay;
-  Window xwindow;
-
-  if (xfixes_cursor->is_showing == FALSE)
-      return;
-
-  if (!xfixes_cursor->have_xfixes || !xfixes_cursor->stage)
-      return;
-
-  xdisplay = clutter_x11_get_default_display ();
-  xwindow = clutter_x11_get_stage_window (xfixes_cursor->stage);
-  XFixesQueryVersion (xdisplay, &major, &minor);
-  if (major >= 4)
-    {
-      XFixesHideCursor (xdisplay, xwindow);
-      xfixes_cursor->is_showing = FALSE;
-    }
-}
-
 static void
 xfixes_cursor_reset_image (ShellXFixesCursor *xfixes_cursor)
 {
@@ -201,7 +142,7 @@ xfixes_cursor_reset_image (ShellXFixesCursor *xfixes_cursor)
   if (!xfixes_cursor->have_xfixes)
     return;
 
-  cursor_image = XFixesGetCursorImage (clutter_x11_get_default_display ());
+  cursor_image = XFixesGetCursorImage (gdk_x11_get_default_xdisplay ());
   if (!cursor_image)
     return;
 
@@ -265,8 +206,8 @@ shell_xfixes_cursor_set_property (GObject      *object,
 
   switch (prop_id)
     {
-    case PROP_STAGE:
-      xfixes_cursor_set_stage (xfixes_cursor, g_value_get_object (value));
+    case PROP_SCREEN:
+      xfixes_cursor_set_screen (xfixes_cursor, g_value_get_object (value));
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -284,8 +225,8 @@ shell_xfixes_cursor_get_property (GObject         *object,
 
   switch (prop_id)
     {
-    case PROP_STAGE:
-      g_value_set_object (value, G_OBJECT (xfixes_cursor->stage));
+    case PROP_SCREEN:
+      g_value_set_object (value, G_OBJECT (xfixes_cursor->screen));
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -311,22 +252,22 @@ shell_xfixes_cursor_class_init (ShellXFixesCursorClass *klass)
   gobject_class->set_property = shell_xfixes_cursor_set_property;
 
   g_object_class_install_property (gobject_class,
-                                   PROP_STAGE,
-                                   g_param_spec_object ("stage",
-                                                        "Stage",
-                                                        "Stage for mouse cursor",
-                                                        CLUTTER_TYPE_STAGE,
+                                   PROP_SCREEN,
+                                   g_param_spec_object ("screen",
+                                                        "Screen",
+                                                        "Screen for mouse cursor",
+                                                        META_TYPE_SCREEN,
                                                         G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
 }
 
 /**
- * shell_xfixes_cursor_get_for_stage:
- * @stage: (transfer none): The #ClutterStage to get the cursor for
+ * shell_xfixes_cursor_get_for_screen:
+ * @screen: (transfer none): The #MetaScreen to get the cursor for
  *
  * Return value: (transfer none): A #ShellXFixesCursor instance
  */
 ShellXFixesCursor *
-shell_xfixes_cursor_get_for_stage (ClutterStage *stage)
+shell_xfixes_cursor_get_for_screen (MetaScreen *screen)
 {
   ShellXFixesCursor *instance;
   static GQuark xfixes_cursor_quark;
@@ -334,47 +275,19 @@ shell_xfixes_cursor_get_for_stage (ClutterStage *stage)
   if (G_UNLIKELY (xfixes_cursor_quark == 0))
     xfixes_cursor_quark = g_quark_from_static_string ("gnome-shell-xfixes-cursor");
 
-  instance = g_object_get_qdata (G_OBJECT (stage), xfixes_cursor_quark);
+  instance = g_object_get_qdata (G_OBJECT (screen), xfixes_cursor_quark);
 
   if (instance == NULL)
     {
       instance = g_object_new (SHELL_TYPE_XFIXES_CURSOR,
-                               "stage", stage,
+                               "screen", screen,
                                NULL);
-      g_object_set_qdata (G_OBJECT (stage), xfixes_cursor_quark, instance);
+      g_object_set_qdata (G_OBJECT (screen), xfixes_cursor_quark, instance);
     }
 
   return instance;
 }
 
-/**
- * shell_xfixes_cursor_hide:
- * @xfixes_cursor: the #ShellXFixesCursor
- *
- * Hide the system mouse cursor.
- */
-void
-shell_xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor)
-{
-  g_return_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor));
-
-  xfixes_cursor_hide (xfixes_cursor);
-}
-
-/**
- * shell_xfixes_cursor_show:
- * @xfixes_cursor: the #ShellXFixesCursor
- *
- * Show the system mouse cursor to show
- */
-void
-shell_xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor)
-{
-  g_return_if_fail (SHELL_IS_XFIXES_CURSOR (xfixes_cursor));
-
-  xfixes_cursor_show (xfixes_cursor);
-}
-
 /**
  * shell_xfixes_cursor_update_texture_image:
  * @xfixes_cursor:  the #ShellXFixesCursor

src/shell-xfixes-cursor.h

@@ -4,6 +4,7 @@
 
 #include <clutter/clutter.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
+#include <meta/screen.h>
 
 G_BEGIN_DECLS
 
@@ -19,10 +20,8 @@ typedef struct _ShellXFixesCursorClass   ShellXFixesCursorClass;
 
 GType               shell_xfixes_cursor_get_type     (void) G_GNUC_CONST;
 
-ShellXFixesCursor   *shell_xfixes_cursor_get_for_stage (ClutterStage *stage);
+ShellXFixesCursor   *shell_xfixes_cursor_get_for_screen (MetaScreen *screen);
 
-void                shell_xfixes_cursor_show (ShellXFixesCursor *xfixes_cursor);
-void                shell_xfixes_cursor_hide (ShellXFixesCursor *xfixes_cursor);
 int                 shell_xfixes_cursor_get_hot_x (ShellXFixesCursor *xfixes_cursor);
 int                 shell_xfixes_cursor_get_hot_y (ShellXFixesCursor *xfixes_cursor);
 void                shell_xfixes_cursor_update_texture_image (ShellXFixesCursor *xfixes_cursor,