general: Implement extensions for GAction

The last commit rework the menus and ported to GAction.
Update the extension mechanism to that.

The changes are very little. Now menu items in extensions lost
the property 'priority' since gmenu doesn't have one, and gain
two properties, menu_name, which is in which menu do you want the
extension to add a menu item, it can be background or selection, and
menu_section, which indicates in which section of the menu do you want
to add the items of the extension.

2 files changed, 291 insertions, 0 deletions

diff --git a/src/nautilus-view-context-menus.xml b/src/nautilus-view-context-menus.xml
index 6aa89a31d..10b821217 100644
--- a/src/nautilus-view-context-menus.xml
+++ b/src/nautilus-view-context-menus.xml
@@ -48,6 +48,9 @@
         <attribute name="hidden-when">action-disabled</attribute>
       </item>
     </section>
+    <section>
+      <attribute name="id">extensions</attribute>
+    </section>
   </menu>
   <menu id="selection-menu">
     <section>
@@ -199,6 +202,9 @@
       </item>
     </section>
     <section>
+      <attribute name="id">extensions</attribute>
+    </section>
+    <section>
       <item>
         <attribute name="label" translatable="yes">P_roperties</attribute>
         <attribute name="action">view.properties</attribute>
diff --git a/src/nautilus-view.c b/src/nautilus-view.c
index b502644d5..7847b47fe 100644
--- a/src/nautilus-view.c
+++ b/src/nautilus-view.c
@@ -3780,6 +3780,289 @@ get_menu_icon_for_file (NautilusFile *file,
 	return pixbuf;
 }
 
+static GList *
+get_extension_selection_menu_items (NautilusView *view)
+{
+	NautilusWindow *window;
+	GList *items;
+	GList *providers;
+	GList *l;
+	GList *selection;
+
+	window = nautilus_view_get_window (view);
+	selection = nautilus_view_get_selection (view);
+	providers = nautilus_module_get_extensions_for_type (NAUTILUS_TYPE_MENU_PROVIDER);
+	items = NULL;
+
+	for (l = providers; l != NULL; l = l->next) {
+		NautilusMenuProvider *provider;
+		GList *file_items;
+
+		provider = NAUTILUS_MENU_PROVIDER (l->data);
+		file_items = nautilus_menu_provider_get_file_items (provider,
+								    GTK_WIDGET (window),
+								    selection);
+		items = g_list_concat (items, file_items);
+	}
+
+	nautilus_module_extension_list_free (providers);
+
+	return items;
+}
+
+static GList *
+get_extension_background_menu_items (NautilusView *view)
+{
+	NautilusWindow *window;
+	NautilusFile *file;
+	GList *items;
+	GList *providers;
+	GList *l;
+
+	window = nautilus_view_get_window (view);
+	providers = nautilus_module_get_extensions_for_type (NAUTILUS_TYPE_MENU_PROVIDER);
+	file = nautilus_window_slot_get_file (view->details->slot);
+	items = NULL;
+
+	for (l = providers; l != NULL; l = l->next) {
+		NautilusMenuProvider *provider;
+		GList *file_items;
+
+		provider = NAUTILUS_MENU_PROVIDER (l->data);
+		file_items = nautilus_menu_provider_get_background_items (provider,
+									  GTK_WIDGET (window),
+									  file);
+		items = g_list_concat (items, file_items);
+	}
+
+	nautilus_module_extension_list_free (providers);
+
+	return items;
+}
+
+typedef struct
+{
+	NautilusMenuItem *item;
+	NautilusView *view;
+	GList *selection;
+	GAction *action;
+} ExtensionActionCallbackData;
+
+
+static void
+extension_action_callback_data_free (ExtensionActionCallbackData *data)
+{
+	g_object_unref (data->item);
+	nautilus_file_list_free (data->selection);
+
+	g_free (data);
+}
+
+static gboolean
+search_in_menu_items (GList      * items,
+		      const char *item_name)
+{
+	GList* list;
+
+	for (list = items; list != NULL; list = list->next) {
+		NautilusMenu* menu;
+		char *name;
+
+		g_object_get (list->data, "name", &name, NULL);
+		if (strcmp (name, item_name) == 0) {
+			g_free (name);
+			return TRUE;
+		}
+		g_free (name);
+
+		menu = NULL;
+		g_object_get (list->data, "menu", &menu, NULL);
+		if (menu != NULL) {
+			gboolean ret;
+			GList* submenus;
+
+			submenus = nautilus_menu_get_items (menu);
+			ret = search_in_menu_items (submenus, item_name);
+			nautilus_menu_item_list_free (submenus);
+			g_object_unref (menu);
+			if (ret) {
+				return TRUE;
+			}
+		}
+	}
+	return FALSE;
+}
+
+static void
+extension_action_callback (GSimpleAction *action,
+			   GVariant      *state,
+			   gpointer       user_data)
+{
+	ExtensionActionCallbackData *data;
+	char *item_name;
+	gboolean is_valid;
+	GList *l;
+	GList *selection_items, *background_items;
+
+	data = user_data;
+
+	/* Make sure the selected menu item is valid for the final sniffed
+	 * mime type */
+	g_object_get (data->item, "name", &item_name, NULL);
+	selection_items = get_extension_selection_menu_items (data->view);
+	background_items = get_extension_background_menu_items (data->view);
+
+	is_valid = search_in_menu_items (selection_items, item_name);
+	if (!is_valid)
+		is_valid = search_in_menu_items (background_items, item_name);
+
+	for (l = selection_items; l != NULL; l = l->next) {
+		g_object_unref (l->data);
+	}
+	for (l = background_items; l != NULL; l = l->next) {
+		g_object_unref (l->data);
+	}
+
+	g_list_free (selection_items);
+	g_list_free (background_items);
+
+	g_free (item_name);
+
+	if (is_valid) {
+		nautilus_menu_item_activate (data->item);
+	}
+}
+
+static void
+add_extension_action (NautilusView *view,
+		      NautilusMenuItem *item)
+{
+	char *name, *label, *parsed_name;
+	gboolean sensitive;
+	GAction *action;
+	ExtensionActionCallbackData *data;
+
+	g_object_get (G_OBJECT (item),
+		      "name", &name, "label", &label,
+		      "sensitive", &sensitive,
+		      NULL);
+
+	parsed_name = nautilus_escape_action_name (name, "extension_");
+	action = G_ACTION (g_simple_action_new (parsed_name, NULL));
+
+	data = g_new0 (ExtensionActionCallbackData, 1);
+	data->item = g_object_ref (item);
+	data->view = view;
+	data->action = action;
+
+	g_signal_connect_data (action, "activate",
+			       G_CALLBACK (extension_action_callback),
+			       data,
+			       (GClosureNotify)extension_action_callback_data_free, 0);
+
+	g_action_map_add_action  (G_ACTION_MAP (view->details->view_action_group),
+				  action);
+	g_simple_action_set_enabled (G_SIMPLE_ACTION (action), sensitive);
+	g_object_unref (action);
+
+	g_free (name);
+	g_free (parsed_name);
+	g_free (label);
+}
+
+static GMenu *
+add_extension_menu_items (NautilusView *view,
+			  GList        *menu_items,
+			  GMenu        *insertion_menu,
+			  GMenuItem    *submenu_parent)
+{
+	GList *l;
+	GMenuItem *menu_item;
+	GMenu *gmenu, *children_menu;
+	char *name, *parsed_name, *label, *detailed_action_name;
+	gboolean sensitive;
+	GdkPixbuf *pixbuf;
+
+	gmenu = g_menu_new ();
+
+	for (l = menu_items; l; l = l->next) {
+		NautilusMenuItem *item;
+		NautilusMenu *menu;
+
+		item = NAUTILUS_MENU_ITEM (l->data);
+
+		g_object_get (item, "menu", &menu, NULL);
+
+		g_object_get (G_OBJECT (item),
+			      "name", &name, "label", &label,
+			      "sensitive", &sensitive,
+			      NULL);
+
+		add_extension_action (view, item);
+		parsed_name = nautilus_escape_action_name (name, "extension_");
+		detailed_action_name =  g_strconcat ("view.", parsed_name, NULL);
+		menu_item = g_menu_item_new (label, detailed_action_name);
+		 if (menu != NULL) {
+			GList *children;
+
+			children = nautilus_menu_get_items (menu);
+
+			children_menu = add_extension_menu_items (view,
+								  children,
+								  insertion_menu,
+								  menu_item);
+
+			nautilus_menu_item_list_free (children);
+			g_menu_item_set_submenu (menu_item, G_MENU_MODEL (children_menu));
+		}
+
+		g_menu_append_item (gmenu, menu_item);
+	}
+
+	if (submenu_parent) {
+		g_menu_item_set_submenu (submenu_parent, G_MENU_MODEL (gmenu));
+	} else {
+		nautilus_gmenu_merge (insertion_menu,
+				      gmenu,
+				      "extensions",
+				      FALSE);
+	}
+
+	g_free (name);
+	g_free (parsed_name);
+	g_free (label);
+
+	return gmenu;
+}
+
+static void
+update_extensions_menus (NautilusView *view)
+{
+	GList *selection_items, *background_items;
+
+	selection_items = get_extension_selection_menu_items (view);
+	background_items = get_extension_background_menu_items (view);
+	if (selection_items != NULL) {
+		add_extension_menu_items (view,
+					  selection_items,
+					  view->details->selection_menu,
+					  NULL);
+
+		g_list_foreach (selection_items, (GFunc) g_object_unref, NULL);
+		g_list_free (selection_items);
+	}
+
+	if (background_items != NULL) {
+		add_extension_menu_items (view,
+					  background_items,
+					  view->details->selection_menu,
+					  NULL);
+
+		g_list_foreach (background_items, (GFunc) g_object_unref, NULL);
+		g_list_free (background_items);
+	}
+}
+
 static char *
 change_to_view_directory (NautilusView *view)
 {
@@ -6245,6 +6528,8 @@ real_update_context_menus (NautilusView *view)
 
 	update_selection_menu (view);
 	update_background_menu (view);
+	update_extensions_menus (view);
+
 	nautilus_view_update_actions_state (view);
 }