forked from AuroraMiddleware/gtk
607 lines
16 KiB
C
607 lines
16 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 <string.h>
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#include <gtk/gtk.h>
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#include "gtkmenuitemaccessible.h"
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#include "gtksubmenuitemaccessible.h"
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#define KEYBINDING_SEPARATOR ";"
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static void menu_item_select (GtkMenuItem *item);
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static void menu_item_deselect (GtkMenuItem *item);
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static GtkWidget *get_label_from_container (GtkWidget *container);
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static gchar *get_text_from_label_widget (GtkWidget *widget);
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static void atk_action_interface_init (AtkActionIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkMenuItemAccessible, gtk_menu_item_accessible, GTK_TYPE_CONTAINER_ACCESSIBLE,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init))
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static void
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gtk_menu_item_accessible_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 (gtk_menu_item_accessible_parent_class)->initialize (obj, data);
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g_signal_connect (data, "select", G_CALLBACK (menu_item_select), NULL);
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g_signal_connect (data, "deselect", G_CALLBACK (menu_item_deselect), 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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atk_object_set_parent (obj, gtk_widget_get_accessible (parent_widget));
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}
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gtk_widget_accessible_set_layer (GTK_WIDGET_ACCESSIBLE (obj), 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 gint
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gtk_menu_item_accessible_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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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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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 = gtk_container_get_children (GTK_CONTAINER (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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gtk_menu_item_accessible_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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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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if (widget == NULL)
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return NULL;
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accessible = 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 = gtk_container_get_children (GTK_CONTAINER (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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accessible = gtk_widget_get_accessible (GTK_WIDGET (tmp_list->data));
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g_object_ref (accessible);
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}
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g_list_free (children);
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}
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return accessible;
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}
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static AtkStateSet *
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gtk_menu_item_accessible_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 (gtk_menu_item_accessible_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_get_widget (GTK_ACCESSIBLE (menu_item))))
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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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g_object_unref (parent_state_set);
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}
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return state_set;
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}
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static const gchar *
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gtk_menu_item_accessible_get_name (AtkObject *obj)
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{
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const gchar *name;
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GtkWidget *widget;
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GtkWidget *label;
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GtkMenuItemAccessible *accessible;
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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (obj));
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if (widget == NULL)
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return NULL;
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name = ATK_OBJECT_CLASS (gtk_menu_item_accessible_parent_class)->get_name (obj);
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if (name)
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return name;
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accessible = GTK_MENU_ITEM_ACCESSIBLE (obj);
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label = get_label_from_container (widget);
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g_free (accessible->text);
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accessible->text = get_text_from_label_widget (label);
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return accessible->text;
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}
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static void
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gtk_menu_item_accessible_finalize (GObject *object)
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{
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GtkMenuItemAccessible *accessible = GTK_MENU_ITEM_ACCESSIBLE (object);
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g_free (accessible->text);
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G_OBJECT_CLASS (gtk_menu_item_accessible_parent_class)->finalize (object);
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}
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static void
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gtk_menu_item_accessible_notify_gtk (GObject *obj,
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GParamSpec *pspec)
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{
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AtkObject* atk_obj;
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atk_obj = gtk_widget_get_accessible (GTK_WIDGET (obj));
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if (strcmp (pspec->name, "label") == 0)
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{
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if (atk_obj->name == NULL)
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g_object_notify (G_OBJECT (atk_obj), "accessible-name");
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g_signal_emit_by_name (atk_obj, "visible_data_changed");
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}
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else
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GTK_WIDGET_ACCESSIBLE_CLASS (gtk_menu_item_accessible_parent_class)->notify_gtk (obj, pspec);
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}
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static void
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gtk_menu_item_accessible_class_init (GtkMenuItemAccessibleClass *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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GtkWidgetAccessibleClass *widget_class = (GtkWidgetAccessibleClass*)klass;
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widget_class->notify_gtk = gtk_menu_item_accessible_notify_gtk;
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gobject_class->finalize = gtk_menu_item_accessible_finalize;
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class->get_n_children = gtk_menu_item_accessible_get_n_children;
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class->ref_child = gtk_menu_item_accessible_ref_child;
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class->ref_state_set = gtk_menu_item_accessible_ref_state_set;
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class->initialize = gtk_menu_item_accessible_initialize;
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class->get_name = gtk_menu_item_accessible_get_name;
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}
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static void
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gtk_menu_item_accessible_init (GtkMenuItemAccessible *menu_item)
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{
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}
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static GtkWidget *
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get_label_from_container (GtkWidget *container)
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{
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GtkWidget *label;
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GList *children, *tmp_list;
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if (!GTK_IS_CONTAINER (container))
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return NULL;
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children = gtk_container_get_children (GTK_CONTAINER (container));
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label = NULL;
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for (tmp_list = children; tmp_list != NULL; tmp_list = tmp_list->next)
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{
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if (GTK_IS_LABEL (tmp_list->data))
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{
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label = tmp_list->data;
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break;
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}
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else if (GTK_IS_CELL_VIEW (tmp_list->data))
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{
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label = tmp_list->data;
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break;
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}
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else if (GTK_IS_BOX (tmp_list->data))
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{
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label = get_label_from_container (GTK_WIDGET (tmp_list->data));
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if (label)
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break;
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}
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}
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g_list_free (children);
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return label;
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}
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static gchar *
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get_text_from_label_widget (GtkWidget *label)
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{
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if (GTK_IS_LABEL (label))
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return g_strdup (gtk_label_get_text (GTK_LABEL (label)));
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else if (GTK_IS_CELL_VIEW (label))
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{
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GList *cells, *l;
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GtkTreeModel *model;
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GtkTreeIter iter;
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GtkTreePath *path;
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GtkCellArea *area;
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gchar *text;
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model = gtk_cell_view_get_model (GTK_CELL_VIEW (label));
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path = gtk_cell_view_get_displayed_row (GTK_CELL_VIEW (label));
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gtk_tree_model_get_iter (model, &iter, path);
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gtk_tree_path_free (path);
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area = gtk_cell_layout_get_area (GTK_CELL_LAYOUT (label));
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gtk_cell_area_apply_attributes (area, model, &iter, FALSE, FALSE);
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cells = gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (label));
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text = NULL;
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for (l = cells; l; l = l->next)
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{
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GtkCellRenderer *cell = l->data;
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if (GTK_IS_CELL_RENDERER_TEXT (cell))
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{
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g_object_get (cell, "text", &text, NULL);
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break;
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}
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}
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g_list_free (cells);
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return text;
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}
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return NULL;
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}
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static void
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ensure_menus_unposted (GtkMenuItemAccessible *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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widget = gtk_accessible_get_widget (GTK_ACCESSIBLE (parent));
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if (GTK_IS_MENU (widget))
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{
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if (gtk_widget_get_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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parent = atk_object_get_parent (parent);
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}
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}
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static gboolean
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gtk_menu_item_accessible_do_action (AtkAction *action,
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gint i)
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{
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GtkWidget *item, *item_parent;
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gboolean item_mapped;
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item = gtk_accessible_get_widget (GTK_ACCESSIBLE (action));
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if (item == NULL)
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return FALSE;
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if (i != 0)
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return FALSE;
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if (!gtk_widget_get_sensitive (item) || !gtk_widget_get_visible (item))
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return FALSE;
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item_parent = gtk_widget_get_parent (item);
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if (!GTK_IS_MENU_SHELL (item_parent))
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return FALSE;
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gtk_menu_shell_select_item (GTK_MENU_SHELL (item_parent), item);
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item_mapped = gtk_widget_get_mapped (item);
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/* This is what is called when <Return> is pressed for a menu item.
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* The last argument means 'force hide'.
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*/
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g_signal_emit_by_name (item_parent, "activate_current", 1);
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if (!item_mapped)
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ensure_menus_unposted (GTK_MENU_ITEM_ACCESSIBLE (action));
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return TRUE;
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}
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static gint
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gtk_menu_item_accessible_get_n_actions (AtkAction *action)
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{
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return 1;
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}
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static const gchar *
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gtk_menu_item_accessible_action_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 NULL;
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return "click";
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}
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static gboolean
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find_accel_by_widget (GtkAccelKey *key,
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GClosure *closure,
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gpointer data)
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{
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/* We assume that closure->data points to the widget
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* pending gtk_widget_get_accel_closures being made public
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*/
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return data == (gpointer) closure->data;
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}
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static gboolean
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find_accel_by_closure (GtkAccelKey *key,
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GClosure *closure,
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gpointer data)
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{
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return data == (gpointer) closure;
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}
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/* This function returns a string of the form A;B;C where A is
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* the keybinding for the widget; B is the keybinding to traverse
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* from the menubar and C is the accelerator. The items in the
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* keybinding to traverse from the menubar are separated by ":".
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*/
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static const gchar *
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gtk_menu_item_accessible_get_keybinding (AtkAction *action,
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gint i)
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{
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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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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_get_widget (GTK_ACCESSIBLE (action));
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if (item == NULL)
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return NULL;
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if (i != 0)
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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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return NULL;
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parent = gtk_widget_get_parent (temp_item);
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if (!parent)
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/* parent can be NULL when activating a window from the panel */
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return 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 =
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gtk_window_get_mnemonic_modifier (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_KEY_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_strdup (key);
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if (temp_item == item)
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item_keybinding = g_strdup (key);
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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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/* We have reached the menu bar so we are finished */
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if (GTK_IS_MENU_BAR (parent))
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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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/* 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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key = gtk_accel_group_find (group, find_accel_by_widget, item);
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else
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{
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key = NULL;
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child = gtk_bin_get_child (GTK_BIN (item));
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if (GTK_IS_ACCEL_LABEL (child))
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{
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GtkAccelLabel *accel_label;
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GClosure *accel_closure;
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accel_label = GTK_ACCEL_LABEL (child);
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g_object_get (accel_label, "accel-closure", &accel_closure, NULL);
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if (accel_closure)
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{
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key = gtk_accel_group_find (gtk_accel_group_from_accel_closure (accel_closure),
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find_accel_by_closure,
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accel_closure);
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g_closure_unref (accel_closure);
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}
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}
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}
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|
|
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_strdup (KEYBINDING_SEPARATOR);
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
return keybinding;
|
|
}
|
|
|
|
static void
|
|
atk_action_interface_init (AtkActionIface *iface)
|
|
{
|
|
iface->do_action = gtk_menu_item_accessible_do_action;
|
|
iface->get_n_actions = gtk_menu_item_accessible_get_n_actions;
|
|
iface->get_name = gtk_menu_item_accessible_action_get_name;
|
|
iface->get_keybinding = gtk_menu_item_accessible_get_keybinding;
|
|
}
|
|
|
|
static void
|
|
menu_item_selection (GtkMenuItem *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 void
|
|
menu_item_select (GtkMenuItem *item)
|
|
{
|
|
menu_item_selection (item, TRUE);
|
|
}
|
|
|
|
static void
|
|
menu_item_deselect (GtkMenuItem *item)
|
|
{
|
|
menu_item_selection (item, FALSE);
|
|
}
|