forked from AuroraMiddleware/gtk
673 lines
20 KiB
C
673 lines
20 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2001, 2002, 2003 Sun Microsystems Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include "gailmenuitem.h"
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#include "gailsubmenuitem.h"
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#define KEYBINDING_SEPARATOR ";"
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static void gail_menu_item_class_init (GailMenuItemClass *klass);
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static void gail_menu_item_init (GailMenuItem *menu_item);
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static void gail_menu_item_real_initialize
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(AtkObject *obj,
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gpointer data);
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static gint gail_menu_item_get_n_children (AtkObject *obj);
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static AtkObject* gail_menu_item_ref_child (AtkObject *obj,
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gint i);
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static AtkStateSet* gail_menu_item_ref_state_set (AtkObject *obj);
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static void gail_menu_item_finalize (GObject *object);
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static void atk_action_interface_init (AtkActionIface *iface);
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static gboolean gail_menu_item_do_action (AtkAction *action,
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gint i);
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static gboolean idle_do_action (gpointer data);
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static gint gail_menu_item_get_n_actions (AtkAction *action);
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static G_CONST_RETURN gchar* gail_menu_item_get_description(AtkAction *action,
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gint i);
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static G_CONST_RETURN gchar* gail_menu_item_get_name (AtkAction *action,
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gint i);
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static G_CONST_RETURN gchar* gail_menu_item_get_keybinding (AtkAction *action,
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gint i);
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static gboolean gail_menu_item_set_description(AtkAction *action,
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gint i,
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const gchar *desc);
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static void menu_item_select (GtkItem *item);
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static void menu_item_deselect (GtkItem *item);
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static void menu_item_selection (GtkItem *item,
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gboolean selected);
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static gboolean find_accel (GtkAccelKey *key,
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GClosure *closure,
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gpointer data);
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static gboolean find_accel_new (GtkAccelKey *key,
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GClosure *closure,
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gpointer data);
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G_DEFINE_TYPE_WITH_CODE (GailMenuItem, gail_menu_item, GAIL_TYPE_ITEM,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
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static void
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gail_menu_item_class_init (GailMenuItemClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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gobject_class->finalize = gail_menu_item_finalize;
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class->get_n_children = gail_menu_item_get_n_children;
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class->ref_child = gail_menu_item_ref_child;
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class->ref_state_set = gail_menu_item_ref_state_set;
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class->initialize = gail_menu_item_real_initialize;
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}
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static void
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gail_menu_item_real_initialize (AtkObject *obj,
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gpointer data)
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{
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GtkWidget *widget;
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GtkWidget *parent;
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ATK_OBJECT_CLASS (gail_menu_item_parent_class)->initialize (obj, data);
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g_signal_connect (data,
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"select",
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G_CALLBACK (menu_item_select),
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NULL);
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g_signal_connect (data,
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"deselect",
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G_CALLBACK (menu_item_deselect),
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NULL);
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widget = GTK_WIDGET (data);
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parent = gtk_widget_get_parent (widget);
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if (GTK_IS_MENU (parent))
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{
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GtkWidget *parent_widget;
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parent_widget = gtk_menu_get_attach_widget (GTK_MENU (parent));
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if (!GTK_IS_MENU_ITEM (parent_widget))
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parent_widget = gtk_widget_get_parent (widget);
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if (parent_widget)
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{
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atk_object_set_parent (obj, gtk_widget_get_accessible (parent_widget));
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}
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}
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g_object_set_data (G_OBJECT (obj), "atk-component-layer",
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GINT_TO_POINTER (ATK_LAYER_POPUP));
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if (GTK_IS_TEAROFF_MENU_ITEM (data))
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obj->role = ATK_ROLE_TEAR_OFF_MENU_ITEM;
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else if (GTK_IS_SEPARATOR_MENU_ITEM (data))
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obj->role = ATK_ROLE_SEPARATOR;
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else
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obj->role = ATK_ROLE_MENU_ITEM;
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}
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static void
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gail_menu_item_init (GailMenuItem *menu_item)
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{
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menu_item->click_keybinding = NULL;
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menu_item->click_description = NULL;
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}
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AtkObject*
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gail_menu_item_new (GtkWidget *widget)
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{
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GObject *object;
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AtkObject *accessible;
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g_return_val_if_fail (GTK_IS_MENU_ITEM (widget), NULL);
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if (gtk_menu_item_get_submenu (GTK_MENU_ITEM (widget)))
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return gail_sub_menu_item_new (widget);
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object = g_object_new (GAIL_TYPE_MENU_ITEM, NULL);
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accessible = ATK_OBJECT (object);
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atk_object_initialize (accessible, widget);
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return accessible;
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}
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GList *
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get_children (GtkWidget *submenu)
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{
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GList *children;
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children = gtk_container_get_children (GTK_CONTAINER (submenu));
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if (g_list_length (children) == 0)
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{
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/*
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* If menu is empty it may be because the menu items are created only
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* on demand. For example, in gnome-panel the menu items are created
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* only when "show" signal is emitted on the menu.
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*
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* The following hack forces the menu items to be created.
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*/
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if (!GTK_WIDGET_VISIBLE (submenu))
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{
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GTK_WIDGET_SET_FLAGS (submenu, GTK_VISIBLE);
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g_signal_emit_by_name (submenu, "show");
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GTK_WIDGET_UNSET_FLAGS (submenu, GTK_VISIBLE);
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}
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g_list_free (children);
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children = gtk_container_get_children (GTK_CONTAINER (submenu));
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}
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return children;
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}
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/*
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* If a menu item has a submenu return the items of the submenu as the
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* accessible children; otherwise expose no accessible children.
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*/
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static gint
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gail_menu_item_get_n_children (AtkObject* obj)
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{
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GtkWidget *widget;
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GtkWidget *submenu;
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gint count = 0;
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g_return_val_if_fail (GAIL_IS_MENU_ITEM (obj), count);
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget == NULL)
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return count;
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submenu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (widget));
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if (submenu)
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{
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GList *children;
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children = get_children (submenu);
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count = g_list_length (children);
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g_list_free (children);
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}
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return count;
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}
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static AtkObject*
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gail_menu_item_ref_child (AtkObject *obj,
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gint i)
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{
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AtkObject *accessible;
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GtkWidget *widget;
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GtkWidget *submenu;
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g_return_val_if_fail (GAIL_IS_MENU_ITEM (obj), NULL);
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g_return_val_if_fail ((i >= 0), NULL);
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget == NULL)
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return NULL;
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submenu = gtk_menu_item_get_submenu (GTK_MENU_ITEM (widget));
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if (submenu)
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{
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GList *children;
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GList *tmp_list;
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children = get_children (submenu);
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tmp_list = g_list_nth (children, i);
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if (!tmp_list)
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{
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g_list_free (children);
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return NULL;
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}
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accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
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g_list_free (children);
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g_object_ref (accessible);
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}
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else
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accessible = NULL;
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return accessible;
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}
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static AtkStateSet*
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gail_menu_item_ref_state_set (AtkObject *obj)
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{
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AtkObject *menu_item;
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AtkStateSet *state_set, *parent_state_set;
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state_set = ATK_OBJECT_CLASS (gail_menu_item_parent_class)->ref_state_set (obj);
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menu_item = atk_object_get_parent (obj);
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if (menu_item)
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{
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if (!GTK_IS_MENU_ITEM (GTK_ACCESSIBLE (menu_item)->widget))
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return state_set;
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parent_state_set = atk_object_ref_state_set (menu_item);
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if (!atk_state_set_contains_state (parent_state_set, ATK_STATE_SELECTED))
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{
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atk_state_set_remove_state (state_set, ATK_STATE_FOCUSED);
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atk_state_set_remove_state (state_set, ATK_STATE_SHOWING);
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}
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}
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return state_set;
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}
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static void
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atk_action_interface_init (AtkActionIface *iface)
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{
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iface->do_action = gail_menu_item_do_action;
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iface->get_n_actions = gail_menu_item_get_n_actions;
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iface->get_description = gail_menu_item_get_description;
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iface->get_name = gail_menu_item_get_name;
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iface->get_keybinding = gail_menu_item_get_keybinding;
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iface->set_description = gail_menu_item_set_description;
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}
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static gboolean
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gail_menu_item_do_action (AtkAction *action,
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gint i)
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{
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if (i == 0)
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{
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GtkWidget *item;
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GailMenuItem *gail_menu_item;
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item = GTK_ACCESSIBLE (action)->widget;
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if (item == NULL)
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/* State is defunct */
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return FALSE;
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if (!GTK_WIDGET_SENSITIVE (item) || !GTK_WIDGET_VISIBLE (item))
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return FALSE;
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gail_menu_item = GAIL_MENU_ITEM (action);
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if (gail_menu_item->action_idle_handler)
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return FALSE;
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else
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{
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gail_menu_item->action_idle_handler =
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gdk_threads_add_idle_full (G_PRIORITY_DEFAULT_IDLE,
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idle_do_action,
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g_object_ref (gail_menu_item),
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(GDestroyNotify) g_object_unref);
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}
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return TRUE;
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}
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else
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return FALSE;
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}
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static void
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ensure_menus_unposted (GailMenuItem *menu_item)
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{
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AtkObject *parent;
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GtkWidget *widget;
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parent = atk_object_get_parent (ATK_OBJECT (menu_item));
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while (parent)
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{
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if (GTK_IS_ACCESSIBLE (parent))
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{
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widget = GTK_ACCESSIBLE (parent)->widget;
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if (GTK_IS_MENU (widget))
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{
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if (GTK_WIDGET_MAPPED (widget))
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gtk_menu_shell_cancel (GTK_MENU_SHELL (widget));
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return;
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}
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}
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parent = atk_object_get_parent (parent);
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}
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}
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static gboolean
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idle_do_action (gpointer data)
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{
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GtkWidget *item;
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GtkWidget *item_parent;
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GailMenuItem *menu_item;
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gboolean item_mapped;
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menu_item = GAIL_MENU_ITEM (data);
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menu_item->action_idle_handler = 0;
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item = GTK_ACCESSIBLE (menu_item)->widget;
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if (item == NULL /* State is defunct */ ||
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!GTK_WIDGET_SENSITIVE (item) || !GTK_WIDGET_VISIBLE (item))
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return FALSE;
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item_parent = gtk_widget_get_parent (item);
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gtk_menu_shell_select_item (GTK_MENU_SHELL (item_parent), item);
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item_mapped = GTK_WIDGET_MAPPED (item);
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/*
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* This is what is called when <Return> is pressed for a menu item
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*/
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g_signal_emit_by_name (item_parent, "activate_current",
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/*force_hide*/ 1);
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if (!item_mapped)
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ensure_menus_unposted (menu_item);
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return FALSE;
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}
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static gint
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gail_menu_item_get_n_actions (AtkAction *action)
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{
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/*
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* Menu item has 1 action
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*/
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return 1;
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}
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static G_CONST_RETURN gchar*
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gail_menu_item_get_description (AtkAction *action,
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gint i)
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{
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if (i == 0)
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{
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GailMenuItem *item;
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item = GAIL_MENU_ITEM (action);
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return item->click_description;
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}
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else
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return NULL;
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}
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static G_CONST_RETURN gchar*
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gail_menu_item_get_name (AtkAction *action,
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gint i)
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{
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if (i == 0)
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return "click";
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else
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return NULL;
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}
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static G_CONST_RETURN gchar*
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gail_menu_item_get_keybinding (AtkAction *action,
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gint i)
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{
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/*
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* This function returns a string of the form A;B;C where
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* A is the keybinding for the widget; B is the keybinding to traverse
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* from the menubar and C is the accelerator.
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* The items in the keybinding to traverse from the menubar are separated
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* by ":".
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*/
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GailMenuItem *gail_menu_item;
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gchar *keybinding = NULL;
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gchar *item_keybinding = NULL;
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gchar *full_keybinding = NULL;
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gchar *accelerator = NULL;
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gail_menu_item = GAIL_MENU_ITEM (action);
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if (i == 0)
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{
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GtkWidget *item;
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GtkWidget *temp_item;
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GtkWidget *child;
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GtkWidget *parent;
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item = GTK_ACCESSIBLE (action)->widget;
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if (item == NULL)
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/* State is defunct */
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return NULL;
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temp_item = item;
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while (TRUE)
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{
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GdkModifierType mnemonic_modifier = 0;
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guint key_val;
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gchar *key, *temp_keybinding;
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child = gtk_bin_get_child (GTK_BIN (temp_item));
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if (child == NULL)
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{
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/* Possibly a tear off menu item; it could also be a menu
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* separator generated by gtk_item_factory_create_items()
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*/
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return NULL;
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}
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parent = gtk_widget_get_parent (temp_item);
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if (!parent)
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{
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/*
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* parent can be NULL when activating a window from the panel
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*/
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return NULL;
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}
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g_return_val_if_fail (GTK_IS_MENU_SHELL (parent), NULL);
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if (GTK_IS_MENU_BAR (parent))
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{
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GtkWidget *toplevel;
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toplevel = gtk_widget_get_toplevel (parent);
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if (toplevel && GTK_IS_WINDOW (toplevel))
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mnemonic_modifier = gtk_window_get_mnemonic_modifier (
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GTK_WINDOW (toplevel));
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}
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if (GTK_IS_LABEL (child))
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{
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key_val = gtk_label_get_mnemonic_keyval (GTK_LABEL (child));
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if (key_val != GDK_VoidSymbol)
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{
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key = gtk_accelerator_name (key_val, mnemonic_modifier);
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if (full_keybinding)
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temp_keybinding = g_strconcat (key, ":", full_keybinding, NULL);
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else
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temp_keybinding = g_strconcat (key, NULL);
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if (temp_item == item)
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{
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item_keybinding = g_strdup (key);
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}
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g_free (key);
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g_free (full_keybinding);
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full_keybinding = temp_keybinding;
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}
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else
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{
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/* No keybinding */
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g_free (full_keybinding);
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full_keybinding = NULL;
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break;
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}
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}
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if (GTK_IS_MENU_BAR (parent))
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/* We have reached the menu bar so we are finished */
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break;
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g_return_val_if_fail (GTK_IS_MENU (parent), NULL);
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temp_item = gtk_menu_get_attach_widget (GTK_MENU (parent));
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if (!GTK_IS_MENU_ITEM (temp_item))
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{
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/*
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* Menu is attached to something other than a menu item;
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* probably an option menu
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*/
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g_free (full_keybinding);
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full_keybinding = NULL;
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break;
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}
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}
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parent = gtk_widget_get_parent (item);
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if (GTK_IS_MENU (parent))
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{
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GtkAccelGroup *group;
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GtkAccelKey *key;
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group = gtk_menu_get_accel_group (GTK_MENU (parent));
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if (group)
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{
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key = gtk_accel_group_find (group, find_accel, item);
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}
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else
|
|
{
|
|
/*
|
|
* If the menu item is created using GtkAction and GtkUIManager
|
|
* we get here.
|
|
*/
|
|
key = NULL;
|
|
child = GTK_BIN (item)->child;
|
|
if (GTK_IS_ACCEL_LABEL (child))
|
|
{
|
|
GtkAccelLabel *accel_label;
|
|
|
|
accel_label = GTK_ACCEL_LABEL (child);
|
|
if (accel_label->accel_closure)
|
|
{
|
|
key = gtk_accel_group_find (accel_label->accel_group,
|
|
find_accel_new,
|
|
accel_label->accel_closure);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
if (key)
|
|
{
|
|
accelerator = gtk_accelerator_name (key->accel_key,
|
|
key->accel_mods);
|
|
}
|
|
}
|
|
}
|
|
/*
|
|
* Concatenate the bindings
|
|
*/
|
|
if (item_keybinding || full_keybinding || accelerator)
|
|
{
|
|
gchar *temp;
|
|
if (item_keybinding)
|
|
{
|
|
keybinding = g_strconcat (item_keybinding, KEYBINDING_SEPARATOR, NULL);
|
|
g_free (item_keybinding);
|
|
}
|
|
else
|
|
keybinding = g_strconcat (KEYBINDING_SEPARATOR, NULL);
|
|
|
|
if (full_keybinding)
|
|
{
|
|
temp = g_strconcat (keybinding, full_keybinding,
|
|
KEYBINDING_SEPARATOR, NULL);
|
|
g_free (full_keybinding);
|
|
}
|
|
else
|
|
temp = g_strconcat (keybinding, KEYBINDING_SEPARATOR, NULL);
|
|
|
|
g_free (keybinding);
|
|
keybinding = temp;
|
|
if (accelerator)
|
|
{
|
|
temp = g_strconcat (keybinding, accelerator, NULL);
|
|
g_free (accelerator);
|
|
g_free (keybinding);
|
|
keybinding = temp;
|
|
}
|
|
}
|
|
g_free (gail_menu_item->click_keybinding);
|
|
gail_menu_item->click_keybinding = keybinding;
|
|
return keybinding;
|
|
}
|
|
|
|
static gboolean
|
|
gail_menu_item_set_description (AtkAction *action,
|
|
gint i,
|
|
const gchar *desc)
|
|
{
|
|
if (i == 0)
|
|
{
|
|
GailMenuItem *item;
|
|
|
|
item = GAIL_MENU_ITEM (action);
|
|
g_free (item->click_description);
|
|
item->click_description = g_strdup (desc);
|
|
return TRUE;
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
static void
|
|
gail_menu_item_finalize (GObject *object)
|
|
{
|
|
GailMenuItem *menu_item = GAIL_MENU_ITEM (object);
|
|
|
|
g_free (menu_item->click_keybinding);
|
|
g_free (menu_item->click_description);
|
|
if (menu_item->action_idle_handler)
|
|
{
|
|
g_source_remove (menu_item->action_idle_handler);
|
|
menu_item->action_idle_handler = 0;
|
|
}
|
|
|
|
G_OBJECT_CLASS (gail_menu_item_parent_class)->finalize (object);
|
|
}
|
|
|
|
static void
|
|
menu_item_select (GtkItem *item)
|
|
{
|
|
menu_item_selection (item, TRUE);
|
|
}
|
|
|
|
static void
|
|
menu_item_deselect (GtkItem *item)
|
|
{
|
|
menu_item_selection (item, FALSE);
|
|
}
|
|
|
|
static void
|
|
menu_item_selection (GtkItem *item,
|
|
gboolean selected)
|
|
{
|
|
AtkObject *obj, *parent;
|
|
gint i;
|
|
|
|
obj = gtk_widget_get_accessible (GTK_WIDGET (item));
|
|
atk_object_notify_state_change (obj, ATK_STATE_SELECTED, selected);
|
|
|
|
for (i = 0; i < atk_object_get_n_accessible_children (obj); i++)
|
|
{
|
|
AtkObject *child;
|
|
child = atk_object_ref_accessible_child (obj, i);
|
|
atk_object_notify_state_change (child, ATK_STATE_SHOWING, selected);
|
|
g_object_unref (child);
|
|
}
|
|
parent = atk_object_get_parent (obj);
|
|
g_signal_emit_by_name (parent, "selection_changed");
|
|
}
|
|
|
|
static gboolean
|
|
find_accel (GtkAccelKey *key,
|
|
GClosure *closure,
|
|
gpointer data)
|
|
{
|
|
/*
|
|
* We assume that closure->data points to the widget
|
|
* pending gtk_widget_get_accel_closures being made public
|
|
*/
|
|
return data == (gpointer) closure->data;
|
|
}
|
|
|
|
static gboolean
|
|
find_accel_new (GtkAccelKey *key,
|
|
GClosure *closure,
|
|
gpointer data)
|
|
{
|
|
return data == (gpointer) closure;
|
|
}
|