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286 lines
8.7 KiB
C
286 lines
8.7 KiB
C
/* CALLY - The Clutter Accessibility Implementation Library
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*
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* Copyright (C) 2008 Igalia, S.L.
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*
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* Author: Alejandro Piñeiro Iglesias <apinheiro@igalia.com>
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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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/**
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* SECTION:cally-root
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* @short_description: Root object for the Cally toolkit
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* @see_also: #ClutterStage
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*
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* #CallyRoot is the root object of the accessibility tree-like
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* hierarchy, exposing the application level.
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*
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* Somewhat equivalent to #GailTopLevel. We consider that this class
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* expose the a11y information of the #ClutterStageManager, as the
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* children of this object are the different ClutterStage managed (so
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* the #GObject used in the atk_object_initialize() is the
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* #ClutterStageManager).
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*/
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#include <clutter/clutter.h>
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#include "cally-root.h"
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/* GObject */
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static void cally_root_finalize (GObject *object);
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/* AtkObject.h */
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static void cally_root_initialize (AtkObject *accessible,
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gpointer data);
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static gint cally_root_get_n_children (AtkObject *obj);
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static AtkObject *cally_root_ref_child (AtkObject *obj,
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gint i);
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static AtkObject *cally_root_get_parent (AtkObject *obj);
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/* Private */
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static void cally_util_stage_added_cb (ClutterStageManager *stage_manager,
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ClutterStage *stage,
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gpointer data);
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static void cally_util_stage_removed_cb (ClutterStageManager *stage_manager,
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ClutterStage *stage,
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gpointer data);
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#define CALLY_ROOT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CALLY_TYPE_ROOT, CallyRootPrivate))
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G_DEFINE_TYPE (CallyRoot, cally_root, ATK_TYPE_GOBJECT_ACCESSIBLE)
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struct _CallyRootPrivate
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{
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/* We save the CallyStage objects. Other option could save the stage
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* list, and then just get the a11y object on the ref_child, etc. But
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* the ref_child is more common that the init and the stage-add,
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* stage-remove, so we avoid getting the accessible object
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* constantly
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*/
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GSList *stage_list;
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/* signals id */
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guint stage_added_id;
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guint stage_removed_id;
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};
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static void
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cally_root_class_init (CallyRootClass *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 = cally_root_finalize;
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/* AtkObject */
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class->get_n_children = cally_root_get_n_children;
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class->ref_child = cally_root_ref_child;
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class->get_parent = cally_root_get_parent;
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class->initialize = cally_root_initialize;
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g_type_class_add_private (gobject_class, sizeof (CallyRootPrivate));
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}
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static void
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cally_root_init (CallyRoot *root)
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{
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root->priv = CALLY_ROOT_GET_PRIVATE (root);
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root->priv->stage_list = NULL;
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root->priv->stage_added_id = 0;
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root->priv->stage_removed_id = 0;
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}
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/**
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* cally_root_new:
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*
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* Creates a new #CallyRoot object.
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*
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* Return value: the newly created #AtkObject
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*
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* Since: 1.4
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*/
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AtkObject*
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cally_root_new (void)
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{
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GObject *object = NULL;
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AtkObject *accessible = NULL;
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ClutterStageManager *stage_manager = NULL;
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object = g_object_new (CALLY_TYPE_ROOT, NULL);
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accessible = ATK_OBJECT (object);
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stage_manager = clutter_stage_manager_get_default ();
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atk_object_initialize (accessible, stage_manager);
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return accessible;
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}
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static void
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cally_root_finalize (GObject *object)
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{
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CallyRoot *root = CALLY_ROOT (object);
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GObject *stage_manager = NULL;
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g_return_if_fail (CALLY_IS_ROOT (object));
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if (root->priv->stage_list)
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{
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g_slist_free (root->priv->stage_list);
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root->priv->stage_list = NULL;
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}
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stage_manager = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (root));
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g_signal_handler_disconnect (stage_manager,
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root->priv->stage_added_id);
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g_signal_handler_disconnect (stage_manager,
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root->priv->stage_added_id);
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G_OBJECT_CLASS (cally_root_parent_class)->finalize (object);
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}
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/* AtkObject.h */
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static void
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cally_root_initialize (AtkObject *accessible,
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gpointer data)
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{
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ClutterStageManager *stage_manager = NULL;
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const GSList *iter = NULL;
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const GSList *stage_list = NULL;
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ClutterStage *clutter_stage = NULL;
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AtkObject *cally_stage = NULL;
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CallyRoot *root = NULL;
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accessible->role = ATK_ROLE_APPLICATION;
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accessible->name = g_get_prgname();
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accessible->accessible_parent = NULL;
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/* children initialization */
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root = CALLY_ROOT (accessible);
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stage_manager = CLUTTER_STAGE_MANAGER (data);
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stage_list = clutter_stage_manager_peek_stages (stage_manager);
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for (iter = stage_list; iter != NULL; iter = g_slist_next (iter))
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{
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clutter_stage = CLUTTER_STAGE (iter->data);
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cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (clutter_stage));
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atk_object_set_parent (cally_stage, ATK_OBJECT (root));
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root->priv->stage_list = g_slist_append (root->priv->stage_list,
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cally_stage);
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}
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root->priv->stage_added_id =
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g_signal_connect (G_OBJECT (stage_manager), "stage-added",
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G_CALLBACK (cally_util_stage_added_cb), root);
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root->priv->stage_removed_id =
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g_signal_connect (G_OBJECT (stage_manager), "stage-removed",
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G_CALLBACK (cally_util_stage_removed_cb), root);
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ATK_OBJECT_CLASS (cally_root_parent_class)->initialize (accessible, data);
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}
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static gint
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cally_root_get_n_children (AtkObject *obj)
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{
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CallyRoot *root = CALLY_ROOT (obj);
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return g_slist_length (root->priv->stage_list);
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}
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static AtkObject*
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cally_root_ref_child (AtkObject *obj,
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gint i)
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{
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CallyRoot *cally_root = NULL;
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GSList *stage_list = NULL;
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gint num = 0;
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AtkObject *item = NULL;
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cally_root = CALLY_ROOT (obj);
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stage_list = cally_root->priv->stage_list;
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num = g_slist_length (stage_list);
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g_return_val_if_fail ((i < num)&&(i >= 0), NULL);
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item = g_slist_nth_data (stage_list, i);
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if (!item)
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{
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return NULL;
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}
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g_object_ref (item);
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return item;
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}
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static AtkObject*
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cally_root_get_parent (AtkObject *obj)
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{
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return NULL;
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}
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/* -------------------------------- PRIVATE --------------------------------- */
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static void
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cally_util_stage_added_cb (ClutterStageManager *stage_manager,
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ClutterStage *stage,
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gpointer data)
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{
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CallyRoot *root = CALLY_ROOT (data);
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AtkObject *cally_stage = NULL;
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gint index = -1;
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cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));
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atk_object_set_parent (cally_stage, ATK_OBJECT (root));
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root->priv->stage_list = g_slist_append (root->priv->stage_list,
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cally_stage);
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index = g_slist_index (root->priv->stage_list, cally_stage);
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g_signal_emit_by_name (root, "children_changed::add",
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index, cally_stage, NULL);
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g_signal_emit_by_name (cally_stage, "create", 0);
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}
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static void
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cally_util_stage_removed_cb (ClutterStageManager *stage_manager,
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ClutterStage *stage,
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gpointer data)
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{
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CallyRoot *root = CALLY_ROOT (data);
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AtkObject *cally_stage = NULL;
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gint index = -1;
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cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (stage));
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index = g_slist_index (root->priv->stage_list, cally_stage);
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root->priv->stage_list = g_slist_remove (root->priv->stage_list,
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cally_stage);
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index = g_slist_index (root->priv->stage_list, cally_stage);
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g_signal_emit_by_name (root, "children_changed::remove",
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index, cally_stage, NULL);
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g_signal_emit_by_name (cally_stage, "destroy", 0);
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}
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