Now with a parser.

3 files changed, 709 insertions, 2 deletions

diff --git a/libdbusmenu-gtk/Makefile.am b/libdbusmenu-gtk/Makefile.am
index e5df6b1..201a631 100644
--- a/libdbusmenu-gtk/Makefile.am
+++ b/libdbusmenu-gtk/Makefile.am
@@ -23,7 +23,8 @@ libdbusmenu_gtkinclude_HEADERS = \
 	dbusmenu-gtk.h \
 	client.h \
 	menu.h \
-	menuitem.h
+	menuitem.h \
+	parser.h
 
 libdbusmenu_gtk_la_SOURCES = \
 	client.h \
@@ -33,7 +34,9 @@ libdbusmenu_gtk_la_SOURCES = \
 	menu.h \
 	menu.c \
 	menuitem.h \
-	menuitem.c
+	menuitem.c \
+	parser.h \
+	parser.c
 
 libdbusmenu_gtk_la_LDFLAGS = \
 	-version-info $(LIBDBUSMENU_CURRENT):$(LIBDBUSMENU_REVISION):$(LIBDBUSMENU_AGE) \
diff --git a/libdbusmenu-gtk/parser.c b/libdbusmenu-gtk/parser.c
new file mode 100644
index 0000000..ead653a
--- /dev/null
+++ b/libdbusmenu-gtk/parser.c
@@ -0,0 +1,667 @@
+/*
+Parse to take a set of GTK Menus and turn them into something that can
+be sent over the wire.
+
+Copyright 2011 Canonical Ltd.
+
+Authors:
+	Numerous (check Bazaar)
+
+This program is free software: you can redistribute it and/or modify it 
+under the terms of either or both of the following licenses:
+
+1) the GNU Lesser General Public License version 3, as published by the 
+Free Software Foundation; and/or
+2) the GNU Lesser General Public License version 2.1, as published by 
+the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranties of 
+MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR 
+PURPOSE.  See the applicable version of the GNU Lesser General Public 
+License for more details.
+
+You should have received a copy of both the GNU Lesser General Public 
+License version 3 and version 2.1 along with this program.  If not, see 
+<http://www.gnu.org/licenses/>
+*/
+
+#include "parser.h"
+#include "menuitem.h"
+
+#define CACHED_MENUITEM  "dbusmenu-gtk-parser-cached-item"
+
+typedef struct _RecurseContext
+{
+  GtkWidget * toplevel;
+  DbusmenuMenuitem * parent;
+} RecurseContext;
+
+static void parse_menu_structure_helper (GtkWidget * widget, RecurseContext * recurse);
+static DbusmenuMenuitem * construct_dbusmenu_for_widget (GtkWidget * widget);
+static void           accel_changed            (GtkWidget *         widget,
+                                                gpointer            data);
+static gboolean       update_stock_item        (DbusmenuMenuitem *  menuitem,
+                                                GtkWidget *         widget);
+static void           checkbox_toggled         (GtkWidget *         widget,
+                                                DbusmenuMenuitem *  mi);
+static void           update_icon_name         (DbusmenuMenuitem *  menuitem,
+                                                GtkWidget *         widget);
+static GtkWidget *    find_menu_label          (GtkWidget *         widget);
+static void           label_notify_cb          (GtkWidget *         widget,
+                                                GParamSpec *        pspec,
+                                                gpointer            data);
+static void           action_notify_cb         (GtkAction *         action,
+                                                GParamSpec *        pspec,
+                                                gpointer            data);
+static void           item_activated           (DbusmenuMenuitem *  item,
+                                                guint               timestamp,
+                                                gpointer            user_data);
+static gboolean       item_about_to_show       (DbusmenuMenuitem *  item,
+                                                gpointer            user_data);
+static void           widget_notify_cb         (GtkWidget  *        widget,
+                                                GParamSpec *        pspec,
+                                                gpointer            data);
+static gboolean       should_show_image        (GtkImage *          image);
+static void           menuitem_notify_cb       (GtkWidget *         widget,
+                                                GParamSpec *        pspec,
+                                                gpointer            data);
+
+/**
+	dbusmenu_gtk_parse_menu_structure:
+	@widget: A #GtkMenuItem or #GtkMenuShell to turn into a #DbusmenuMenuitem
+
+	Goes through the GTK structures and turns them into the appropraite
+	Dbusmenu structures along with setting up all the relationships
+	between the objects.  It also stores the dbusmenu items as a cache
+	on the GTK items so that they'll be reused if necissary.
+
+	Return value: A dbusmenu item representing the menu structure
+*/
+DbusmenuMenuitem *
+dbusmenu_gtk_parse_menu_structure (GtkWidget * widget)
+{
+  g_return_val_if_fail(GTK_IS_MENU_ITEM(widget) || GTK_IS_MENU_SHELL(widget), NULL);
+
+  RecurseContext recurse = {0};
+
+  recurse.toplevel = gtk_widget_get_toplevel(widget);
+
+  parse_menu_structure_helper(widget, &recurse);
+
+  return recurse.parent;
+}
+
+/* Called when the dbusmenu item that we're keeping around
+   is finalized */
+static void
+dbusmenu_cache_freed (gpointer data, GObject * obj)
+{
+	/* If the dbusmenu item is killed we don't need to remove
+	   the weak ref as well. */
+	g_object_steal_data(G_OBJECT(data), CACHED_MENUITEM);
+	g_signal_handlers_disconnect_by_func(data, G_CALLBACK(widget_notify_cb), obj);
+	return;
+}
+
+/* Called if we replace the cache on the object with a new
+   dbusmenu menuitem */
+static void
+object_cache_freed (gpointer data)
+{
+	if (!G_IS_OBJECT(data)) return;
+	g_object_weak_unref(G_OBJECT(data), dbusmenu_cache_freed, data);
+	return;
+}
+
+static void
+parse_menu_structure_helper (GtkWidget * widget, RecurseContext * recurse)
+{
+
+	/* If this is a shell, then let's handle the items in it. */
+	if (GTK_IS_MENU_SHELL (widget)) {
+		/* Okay, this is a little janky and all.. but some applications update some
+		 * menuitem properties such as sensitivity on the activate callback.  This
+		 * seems a little weird, but it's not our place to judge when all this code
+		 * is so crazy.  So we're going to get ever crazier and activate all the
+		 * menus that are directly below the menubar and force the applications to
+		 * update their sensitivity.  The menus won't actually popup in the app
+		 * window due to our gtk+ patches.
+		 *
+		 * Note that this will not force menuitems in submenus to be updated as well.
+		 */
+		if (recurse->parent == NULL && GTK_IS_MENU_BAR(widget)) {
+			GList *children = gtk_container_get_children (GTK_CONTAINER (widget));
+
+			for (; children != NULL; children = children->next) {
+				gtk_menu_shell_activate_item (GTK_MENU_SHELL (widget),
+				                              children->data,
+				                              TRUE);
+			}
+
+			g_list_free (children);
+		}
+
+		if (recurse->parent == NULL) {
+			recurse->parent = dbusmenu_menuitem_new();
+		}
+
+		gtk_container_foreach (GTK_CONTAINER (widget),
+		                       (GtkCallback)parse_menu_structure_helper,
+		                       recurse);
+		return;
+	}
+
+	if (GTK_IS_MENU_ITEM(widget)) {
+		DbusmenuMenuitem * thisitem = NULL;
+
+		/* Check to see if we're cached already */
+		gpointer pmi = g_object_get_data(G_OBJECT(widget), CACHED_MENUITEM);
+		if (pmi != NULL) {
+			thisitem = DBUSMENU_MENUITEM(pmi);
+			g_object_ref(G_OBJECT(thisitem));
+		}
+
+		/* We don't have one, so we'll need to build it */
+		if (thisitem == NULL) {
+			thisitem = construct_dbusmenu_for_widget (widget);
+			g_object_set_data_full(G_OBJECT(widget), CACHED_MENUITEM, thisitem, object_cache_freed);
+			g_object_weak_ref(G_OBJECT(thisitem), dbusmenu_cache_freed, widget);
+
+			if (!gtk_widget_get_visible (widget)) {
+				g_signal_connect (G_OBJECT (widget),
+				                  "notify::visible",
+				                  G_CALLBACK (menuitem_notify_cb),
+				                  recurse->toplevel);
+            }
+
+			if (GTK_IS_TEAROFF_MENU_ITEM (widget)) {
+				dbusmenu_menuitem_property_set_bool (thisitem,
+				                                     DBUSMENU_MENUITEM_PROP_VISIBLE,
+				                                     FALSE);
+            }
+		}
+
+		/* Check to see if we're in our parents list of children, if we have
+		   a parent. */
+		if (recurse->parent != NULL) {
+			GList * children = dbusmenu_menuitem_get_children (recurse->parent);
+			GList * peek = NULL;
+
+			if (children != NULL) {
+				peek = g_list_find (children, thisitem);
+			}
+
+			/* Oops, let's tell our parents about us */
+			if (peek == NULL) {
+				/* TODO: Should we set a weak ref on the parent? */
+				g_object_set_data (G_OBJECT (thisitem),
+				                   "dbusmenu-parent",
+				                   recurse->parent);
+				dbusmenu_menuitem_child_append (recurse->parent,
+				                                thisitem);
+			}
+		}
+
+		GtkWidget *menu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (widget));
+		if (menu != NULL) {
+			DbusmenuMenuitem * parent_save = recurse->parent;
+			recurse->parent = thisitem;
+			parse_menu_structure_helper (menu, recurse);
+			recurse->parent = parent_save;
+		}
+
+		if (recurse->parent == NULL) {
+			recurse->parent = thisitem;
+		} else {
+			g_object_unref(thisitem);
+		}
+	}
+
+	return;
+}
+
+static DbusmenuMenuitem *
+construct_dbusmenu_for_widget (GtkWidget * widget)
+{
+  DbusmenuMenuitem *mi = dbusmenu_menuitem_new ();
+
+  if (GTK_IS_MENU_ITEM (widget))
+    {
+      gboolean visible = FALSE;
+      gboolean sensitive = FALSE;
+      if (GTK_IS_SEPARATOR_MENU_ITEM (widget))
+        {
+          dbusmenu_menuitem_property_set (mi,
+                                          "type",
+                                          "separator");
+
+          visible = gtk_widget_get_visible (widget);
+          sensitive = gtk_widget_get_sensitive (widget);
+        }
+      else
+        {
+          gboolean label_set = FALSE;
+
+          g_signal_connect (widget,
+                            "accel-closures-changed",
+                            G_CALLBACK (accel_changed),
+                            mi);
+
+          if (GTK_IS_CHECK_MENU_ITEM (widget))
+            {
+              dbusmenu_menuitem_property_set (mi,
+                                              DBUSMENU_MENUITEM_PROP_TOGGLE_TYPE,
+                                              gtk_check_menu_item_get_draw_as_radio (GTK_CHECK_MENU_ITEM (widget)) ? DBUSMENU_MENUITEM_TOGGLE_RADIO : DBUSMENU_MENUITEM_TOGGLE_CHECK);
+
+              dbusmenu_menuitem_property_set_int (mi,
+                                                  DBUSMENU_MENUITEM_PROP_TOGGLE_STATE,
+                                                  gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM (widget)) ? DBUSMENU_MENUITEM_TOGGLE_STATE_CHECKED : DBUSMENU_MENUITEM_TOGGLE_STATE_UNCHECKED);
+
+              g_signal_connect (widget,
+                                "activate",
+                                G_CALLBACK (checkbox_toggled),
+                                mi);
+            }
+
+          if (GTK_IS_IMAGE_MENU_ITEM (widget))
+            {
+              GtkWidget *image;
+              GtkImageType image_type;
+
+              image = gtk_image_menu_item_get_image (GTK_IMAGE_MENU_ITEM (widget));
+
+              if (GTK_IS_IMAGE (image))
+                {
+                  image_type = gtk_image_get_storage_type (GTK_IMAGE (image));
+
+                  if (image_type == GTK_IMAGE_STOCK)
+                    {
+                      label_set = update_stock_item (mi, image);
+                    }
+                  else if (image_type == GTK_IMAGE_ICON_NAME)
+                    {
+                      update_icon_name (mi, image);
+                    }
+                  else if (image_type == GTK_IMAGE_PIXBUF)
+                    {
+                      dbusmenu_menuitem_property_set_image (mi,
+                                                            DBUSMENU_MENUITEM_PROP_ICON_DATA,
+                                                            gtk_image_get_pixbuf (GTK_IMAGE (image)));
+                    }
+                }
+            }
+
+          GtkWidget *label = find_menu_label (widget);
+
+          dbusmenu_menuitem_property_set (mi,
+                                          "label",
+                                          label ? gtk_label_get_text (GTK_LABEL (label)) : NULL);
+
+          if (label)
+            {
+              // Sometimes, an app will directly find and modify the label
+              // (like empathy), so watch the label especially for that.
+              g_signal_connect (G_OBJECT (label),
+                                "notify",
+                                G_CALLBACK (label_notify_cb),
+                                mi);
+            }
+
+          if (GTK_IS_ACTIVATABLE (widget))
+            {
+              GtkActivatable *activatable = GTK_ACTIVATABLE (widget);
+
+              if (gtk_activatable_get_use_action_appearance (activatable))
+                {
+                  GtkAction *action = gtk_activatable_get_related_action (activatable);
+
+                  if (action)
+                    {
+                      visible = gtk_action_is_visible (action);
+                      sensitive = gtk_action_is_sensitive (action);
+
+                      g_signal_connect_object (action, "notify",
+                                               G_CALLBACK (action_notify_cb),
+                                               mi,
+                                               G_CONNECT_AFTER);
+                    }
+                }
+            }
+
+          if (!g_object_get_data (G_OBJECT (widget), "gtk-empty-menu-item") && !GTK_IS_TEAROFF_MENU_ITEM (widget))
+            {
+              visible = gtk_widget_get_visible (widget);
+              sensitive = gtk_widget_get_sensitive (widget);
+            }
+
+          dbusmenu_menuitem_property_set_shortcut_menuitem (mi, GTK_MENU_ITEM (widget));
+
+          g_signal_connect (G_OBJECT (mi),
+                            DBUSMENU_MENUITEM_SIGNAL_ITEM_ACTIVATED,
+                            G_CALLBACK (item_activated),
+                            widget);
+
+          g_signal_connect (G_OBJECT (mi),
+                            DBUSMENU_MENUITEM_SIGNAL_ABOUT_TO_SHOW,
+                            G_CALLBACK (item_about_to_show),
+                            widget);
+        }
+
+      dbusmenu_menuitem_property_set_bool (mi,
+                                           DBUSMENU_MENUITEM_PROP_VISIBLE,
+                                           visible);
+
+      dbusmenu_menuitem_property_set_bool (mi,
+                                           DBUSMENU_MENUITEM_PROP_ENABLED,
+                                           sensitive);
+
+      g_signal_connect (widget,
+                        "notify",
+                        G_CALLBACK (widget_notify_cb),
+                        mi);
+    }
+
+  return mi;
+
+	return NULL;
+}
+
+static void
+menuitem_notify_cb (GtkWidget  *widget,
+                    GParamSpec *pspec,
+                    gpointer    data)
+{
+  if (pspec->name == g_intern_static_string ("visible"))
+    {
+      GtkWidget * new_toplevel = gtk_widget_get_toplevel (widget);
+	  GtkWidget * old_toplevel = GTK_WIDGET(data);
+
+      if (new_toplevel == old_toplevel) {
+          /* TODO: Figure this out -> rebuild (context->bridge, window); */
+      }
+
+      /* We only care about this once, so let's disconnect now. */
+      g_signal_handlers_disconnect_by_func (widget,
+                                            G_CALLBACK (menuitem_notify_cb),
+                                            data);
+    }
+}
+
+static void
+accel_changed (GtkWidget *widget,
+               gpointer   data)
+{
+  DbusmenuMenuitem *mi = (DbusmenuMenuitem *)data;
+  dbusmenu_menuitem_property_set_shortcut_menuitem (mi, GTK_MENU_ITEM (widget));
+}
+
+static gboolean
+update_stock_item (DbusmenuMenuitem *menuitem,
+                   GtkWidget        *widget)
+{
+  GtkStockItem stock;
+  GtkImage *image;
+
+  g_return_val_if_fail (GTK_IS_IMAGE (widget), FALSE);
+
+  image = GTK_IMAGE (widget);
+
+  if (gtk_image_get_storage_type (image) != GTK_IMAGE_STOCK)
+    return FALSE;
+
+  gchar * stock_id = NULL;
+  gtk_image_get_stock(image, &stock_id, NULL);
+
+  gtk_stock_lookup (stock_id, &stock);
+
+  if (should_show_image (image))
+    dbusmenu_menuitem_property_set (menuitem,
+                                    DBUSMENU_MENUITEM_PROP_ICON_NAME,
+                                    stock_id);
+  else
+    dbusmenu_menuitem_property_remove (menuitem,
+                                       DBUSMENU_MENUITEM_PROP_ICON_NAME);
+
+  const gchar *label = dbusmenu_menuitem_property_get (menuitem,
+                                                       DBUSMENU_MENUITEM_PROP_LABEL);
+
+  if (stock.label != NULL && label != NULL)
+    {
+      dbusmenu_menuitem_property_set (menuitem,
+                                      DBUSMENU_MENUITEM_PROP_LABEL,
+                                      stock.label);
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+static void
+checkbox_toggled (GtkWidget *widget, DbusmenuMenuitem *mi)
+{
+  dbusmenu_menuitem_property_set_int (mi,
+                                      DBUSMENU_MENUITEM_PROP_TOGGLE_STATE,
+                                      gtk_check_menu_item_get_active (GTK_CHECK_MENU_ITEM (widget)) ? DBUSMENU_MENUITEM_TOGGLE_STATE_CHECKED : DBUSMENU_MENUITEM_TOGGLE_STATE_UNCHECKED);
+}
+
+static void
+update_icon_name (DbusmenuMenuitem *menuitem,
+                  GtkWidget        *widget)
+{
+  GtkImage *image;
+
+  g_return_if_fail (GTK_IS_IMAGE (widget));
+
+  image = GTK_IMAGE (widget);
+
+  if (gtk_image_get_storage_type (image) != GTK_IMAGE_ICON_NAME)
+    return;
+
+  if (should_show_image (image)) {
+    const gchar * icon_name = NULL;
+	gtk_image_get_icon_name(image, &icon_name, NULL);
+    dbusmenu_menuitem_property_set (menuitem,
+                                    DBUSMENU_MENUITEM_PROP_ICON_NAME,
+                                    icon_name);
+  } else {
+    dbusmenu_menuitem_property_remove (menuitem,
+                                       DBUSMENU_MENUITEM_PROP_ICON_NAME);
+  }
+}
+
+static GtkWidget *
+find_menu_label (GtkWidget *widget)
+{
+  GtkWidget *label = NULL;
+
+  if (GTK_IS_LABEL (widget))
+    return widget;
+
+  if (GTK_IS_CONTAINER (widget))
+    {
+      GList *children;
+      GList *l;
+
+      children = gtk_container_get_children (GTK_CONTAINER (widget));
+
+      for (l = children; l; l = l->next)
+        {
+          label = find_menu_label (l->data);
+
+          if (label)
+            break;
+        }
+
+      g_list_free (children);
+    }
+
+  return label;
+}
+
+static void
+label_notify_cb (GtkWidget  *widget,
+                 GParamSpec *pspec,
+                 gpointer    data)
+{
+  DbusmenuMenuitem *child = (DbusmenuMenuitem *)data;
+
+  if (pspec->name == g_intern_static_string ("label"))
+    {
+      dbusmenu_menuitem_property_set (child,
+                                      DBUSMENU_MENUITEM_PROP_LABEL,
+                                      gtk_label_get_text (GTK_LABEL (widget)));
+    }
+}
+
+static void
+action_notify_cb (GtkAction  *action,
+                  GParamSpec *pspec,
+                  gpointer    data)
+{
+  DbusmenuMenuitem *mi = (DbusmenuMenuitem *)data;
+
+  if (pspec->name == g_intern_static_string ("sensitive"))
+    {
+      dbusmenu_menuitem_property_set_bool (mi,
+                                           DBUSMENU_MENUITEM_PROP_ENABLED,
+                                           gtk_action_is_sensitive (action));
+    }
+  else if (pspec->name == g_intern_static_string ("visible"))
+    {
+      dbusmenu_menuitem_property_set_bool (mi,
+                                           DBUSMENU_MENUITEM_PROP_VISIBLE,
+                                           gtk_action_is_visible (action));
+    }
+  else if (pspec->name == g_intern_static_string ("active"))
+    {
+      dbusmenu_menuitem_property_set_int (mi,
+                                          DBUSMENU_MENUITEM_PROP_TOGGLE_STATE,
+                                          gtk_toggle_action_get_active (GTK_TOGGLE_ACTION (action)) ? DBUSMENU_MENUITEM_TOGGLE_STATE_CHECKED : DBUSMENU_MENUITEM_TOGGLE_STATE_UNCHECKED);
+    }
+  else if (pspec->name == g_intern_static_string ("label"))
+    {
+      dbusmenu_menuitem_property_set (mi,
+                                      DBUSMENU_MENUITEM_PROP_LABEL,
+                                      gtk_action_get_label (action));
+    }
+}
+
+static void
+item_activated (DbusmenuMenuitem *item, guint timestamp, gpointer user_data)
+{
+  GtkWidget *child;
+
+  if (user_data != NULL)
+    {
+      child = (GtkWidget *)user_data;
+
+      if (GTK_IS_MENU_ITEM (child))
+        {
+          gtk_menu_item_activate (GTK_MENU_ITEM (child));
+        }
+    }
+}
+
+static gboolean
+item_about_to_show (DbusmenuMenuitem *item, gpointer user_data)
+{
+  GtkWidget *child;
+
+  if (user_data != NULL)
+    {
+      child = (GtkWidget *)user_data;
+
+      if (GTK_IS_MENU_ITEM (child))
+        {
+          // Only called for items with submens.  So we activate it here in
+          // case the program dynamically creates menus (like empathy does)
+          gtk_menu_item_activate (GTK_MENU_ITEM (child));
+        }
+    }
+
+  return TRUE;
+}
+
+static void
+widget_notify_cb (GtkWidget  *widget,
+                  GParamSpec *pspec,
+                  gpointer    data)
+{
+  DbusmenuMenuitem *child = (DbusmenuMenuitem *)data;
+
+  if (pspec->name == g_intern_static_string ("sensitive"))
+    {
+      dbusmenu_menuitem_property_set_bool (child,
+                                           DBUSMENU_MENUITEM_PROP_ENABLED,
+                                           gtk_widget_get_sensitive (widget));
+    }
+  else if (pspec->name == g_intern_static_string ("label"))
+    {
+      dbusmenu_menuitem_property_set (child,
+                                      DBUSMENU_MENUITEM_PROP_LABEL,
+                                      gtk_menu_item_get_label (GTK_MENU_ITEM (widget)));
+    }
+  else if (pspec->name == g_intern_static_string ("visible"))
+    {
+      dbusmenu_menuitem_property_set_bool (child,
+                                           DBUSMENU_MENUITEM_PROP_VISIBLE,
+                                           gtk_widget_get_visible (widget));
+    }
+  else if (pspec->name == g_intern_static_string ("stock"))
+    {
+      update_stock_item (child, widget);
+    }
+  else if (pspec->name == g_intern_static_string ("icon-name"))
+    {
+      update_icon_name (child, widget);
+    }
+  else if (pspec->name == g_intern_static_string ("parent"))
+    {
+      /*
+        * We probably should have added a 'remove' method to the
+        * UbuntuMenuProxy early on, but it's late in the cycle now.
+        */
+      if (gtk_widget_get_parent (widget) == NULL)
+        {
+          g_signal_handlers_disconnect_by_func (widget,
+                                                G_CALLBACK (widget_notify_cb),
+                                                child);
+
+          DbusmenuMenuitem *parent = g_object_get_data (G_OBJECT (child), "dbusmenu-parent");
+
+          if (DBUSMENU_IS_MENUITEM (parent) && DBUSMENU_IS_MENUITEM (child))
+            {
+              dbusmenu_menuitem_child_delete (parent, child);
+            }
+        }
+    }
+}
+
+static gboolean
+should_show_image (GtkImage *image)
+{
+  GtkWidget *item;
+
+  item = gtk_widget_get_ancestor (GTK_WIDGET (image),
+                                  GTK_TYPE_IMAGE_MENU_ITEM);
+
+  if (item)
+    {
+      GtkSettings *settings;
+      gboolean gtk_menu_images;
+
+      settings = gtk_widget_get_settings (item);
+
+      g_object_get (settings, "gtk-menu-images", &gtk_menu_images, NULL);
+
+      if (gtk_menu_images)
+        return TRUE;
+
+      return gtk_image_menu_item_get_always_show_image (GTK_IMAGE_MENU_ITEM (item));
+    }
+
+  return FALSE;
+}
+
diff --git a/libdbusmenu-gtk/parser.h b/libdbusmenu-gtk/parser.h
new file mode 100644
index 0000000..a40d709
--- /dev/null
+++ b/libdbusmenu-gtk/parser.h
@@ -0,0 +1,37 @@
+/*
+Parse to take a set of GTK Menus and turn them into something that can
+be sent over the wire.
+
+Copyright 2011 Canonical Ltd.
+
+Authors:
+    Ted Gould <ted@canonical.com>
+
+This program is free software: you can redistribute it and/or modify it 
+under the terms of either or both of the following licenses:
+
+1) the GNU Lesser General Public License version 3, as published by the 
+Free Software Foundation; and/or
+2) the GNU Lesser General Public License version 2.1, as published by 
+the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but 
+WITHOUT ANY WARRANTY; without even the implied warranties of 
+MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR 
+PURPOSE.  See the applicable version of the GNU Lesser General Public 
+License for more details.
+
+You should have received a copy of both the GNU Lesser General Public 
+License version 3 and version 2.1 along with this program.  If not, see 
+<http://www.gnu.org/licenses/>
+*/
+
+#ifndef DBUSMENU_GTK_PARSER_H__
+#define DBUSMENU_GTK_PARSER_H__
+
+#include <libdbusmenu-glib/menuitem.h>
+#include <gtk/gtk.h>
+
+DbusmenuMenuitem * dbusmenu_gtk_parse_menu_structure (GtkWidget * widget);
+
+#endif /* DBUSMENU_GTK_PARSER_H__ */