compositor: Expose MetaPlugin vmethod to create a MetaCloseDialog

So the actual close dialog can be overridden by MetaPlugin implementations.

https://bugzilla.gnome.org/show_bug.cgi?id=711619

src/compositor/compositor-private.h

@@ -62,4 +62,7 @@ gint64 meta_compositor_monotonic_time_to_server_time (MetaDisplay *display,
 void meta_compositor_flash_window (MetaCompositor *compositor,
                                    MetaWindow     *window);
 
+MetaCloseDialog * meta_compositor_create_close_dialog (MetaCompositor *compositor,
+                                                       MetaWindow     *window);
+
 #endif /* META_COMPOSITOR_PRIVATE_H */

src/compositor/compositor.c

@@ -1414,3 +1414,11 @@ meta_compositor_show_window_menu_for_rect (MetaCompositor     *compositor,
 {
   meta_plugin_manager_show_window_menu_for_rect (compositor->plugin_mgr, window, menu, rect);
 }
+
+MetaCloseDialog *
+meta_compositor_create_close_dialog (MetaCompositor *compositor,
+                                     MetaWindow     *window)
+{
+  return meta_plugin_manager_create_close_dialog (compositor->plugin_mgr,
+                                                  window);
+}

src/compositor/meta-plugin-manager.c

@@ -27,6 +27,7 @@
 #include <meta/workspace.h>
 #include "meta-module.h"
 #include "window-private.h"
+#include "meta-close-dialog-default-private.h"
 
 #include <string.h>
 #include <stdlib.h>
@@ -376,3 +377,16 @@ meta_plugin_manager_show_window_menu_for_rect (MetaPluginManager  *plugin_mgr,
   if (klass->show_window_menu_for_rect)
     klass->show_window_menu_for_rect (plugin, window, menu, rect);
 }
+
+MetaCloseDialog *
+meta_plugin_manager_create_close_dialog (MetaPluginManager *plugin_mgr,
+                                         MetaWindow        *window)
+{
+  MetaPlugin *plugin = plugin_mgr->plugin;
+  MetaPluginClass *klass = META_PLUGIN_GET_CLASS (plugin);
+
+  if (klass->create_close_dialog)
+    return klass->create_close_dialog (plugin, window);
+
+  return meta_close_dialog_default_new (window);
+}

src/compositor/meta-plugin-manager.h

@@ -91,5 +91,7 @@ void meta_plugin_manager_show_window_menu_for_rect (MetaPluginManager  *mgr,
 						    MetaWindowMenuType  menu,
 						    MetaRectangle      *rect);
 
+MetaCloseDialog * meta_plugin_manager_create_close_dialog (MetaPluginManager *plugin_mgr,
+                                                           MetaWindow        *window);
 
 #endif

src/meta/meta-plugin.h

@@ -26,6 +26,7 @@
 #include <meta/compositor.h>
 #include <meta/compositor-mutter.h>
 #include <meta/meta-version.h>
+#include <meta/meta-close-dialog.h>
 
 #include <clutter/clutter.h>
 #include <X11/extensions/Xfixes.h>
@@ -228,6 +229,16 @@ struct _MetaPluginClass
    */
   const MetaPluginInfo * (*plugin_info) (MetaPlugin *plugin);
 
+  /**
+   * MetaPluginClass::create_close_dialog:
+   * @plugin: a #MetaPlugin
+   * @window: a #MetaWindow
+   *
+   * Virtual function called to create a "force quit" dialog
+   * on non-responsive clients.
+   */
+  MetaCloseDialog * (* create_close_dialog) (MetaPlugin *plugin,
+                                             MetaWindow *window);
 };
 
 /**