/* CALLY - The Clutter Accessibility Implementation Library * * Copyright (C) 2008 Igalia, S.L. * * Author: Alejandro Piñeiro Iglesias * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:cally-root * @short_description: Root object for the Cally toolkit * @see_also: #ClutterStage * * #CallyRoot is the root object of the accessibility tree-like * hierarchy, exposing the application level. * * Somewhat equivalent to #GailTopLevel. We consider that this class * expose the a11y information of the #ClutterStageManager, as the * children of this object are the different ClutterStage managed (so * the #GObject used in the atk_object_initialize() is the * #ClutterStageManager). */ #include #include "cally-root.h" /* GObject */ static void cally_root_finalize (GObject *object); /* AtkObject.h */ static void cally_root_initialize (AtkObject *accessible, gpointer data); static gint cally_root_get_n_children (AtkObject *obj); static AtkObject *cally_root_ref_child (AtkObject *obj, gint i); static AtkObject *cally_root_get_parent (AtkObject *obj); /* Private */ static void cally_util_stage_added_cb (ClutterStageManager *stage_manager, ClutterStage *stage, gpointer data); static void cally_util_stage_removed_cb (ClutterStageManager *stage_manager, ClutterStage *stage, gpointer data); #define CALLY_ROOT_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CALLY_TYPE_ROOT, CallyRootPrivate)) G_DEFINE_TYPE (CallyRoot, cally_root, ATK_TYPE_GOBJECT_ACCESSIBLE) struct _CallyRootPrivate { /* We save the CallyStage objects. Other option could save the stage * list, and then just get the a11y object on the ref_child, etc. But * the ref_child is more common that the init and the stage-add, * stage-remove, so we avoid getting the accessible object * constantly */ GSList *stage_list; /* signals id */ guint stage_added_id; guint stage_removed_id; }; static void cally_root_class_init (CallyRootClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); AtkObjectClass *class = ATK_OBJECT_CLASS (klass); gobject_class->finalize = cally_root_finalize; /* AtkObject */ class->get_n_children = cally_root_get_n_children; class->ref_child = cally_root_ref_child; class->get_parent = cally_root_get_parent; class->initialize = cally_root_initialize; g_type_class_add_private (gobject_class, sizeof (CallyRootPrivate)); } static void cally_root_init (CallyRoot *root) { root->priv = CALLY_ROOT_GET_PRIVATE (root); root->priv->stage_list = NULL; root->priv->stage_added_id = 0; root->priv->stage_removed_id = 0; } /** * cally_root_new: * * Creates a new #CallyRoot object. * * Return value: the newly created #AtkObject * * Since: 1.4 */ AtkObject* cally_root_new (void) { GObject *object = NULL; AtkObject *accessible = NULL; ClutterStageManager *stage_manager = NULL; object = g_object_new (CALLY_TYPE_ROOT, NULL); accessible = ATK_OBJECT (object); stage_manager = clutter_stage_manager_get_default (); atk_object_initialize (accessible, stage_manager); return accessible; } static void cally_root_finalize (GObject *object) { CallyRoot *root = CALLY_ROOT (object); GObject *stage_manager = NULL; g_return_if_fail (CALLY_IS_ROOT (object)); if (root->priv->stage_list) { g_slist_free (root->priv->stage_list); root->priv->stage_list = NULL; } stage_manager = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (root)); g_signal_handler_disconnect (stage_manager, root->priv->stage_added_id); g_signal_handler_disconnect (stage_manager, root->priv->stage_added_id); G_OBJECT_CLASS (cally_root_parent_class)->finalize (object); } /* AtkObject.h */ static void cally_root_initialize (AtkObject *accessible, gpointer data) { ClutterStageManager *stage_manager = NULL; const GSList *iter = NULL; const GSList *stage_list = NULL; ClutterStage *clutter_stage = NULL; AtkObject *cally_stage = NULL; CallyRoot *root = NULL; accessible->role = ATK_ROLE_APPLICATION; accessible->name = g_get_prgname(); accessible->accessible_parent = NULL; /* children initialization */ root = CALLY_ROOT (accessible); stage_manager = CLUTTER_STAGE_MANAGER (data); stage_list = clutter_stage_manager_peek_stages (stage_manager); for (iter = stage_list; iter != NULL; iter = g_slist_next (iter)) { clutter_stage = CLUTTER_STAGE (iter->data); cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (clutter_stage)); atk_object_set_parent (cally_stage, ATK_OBJECT (root)); root->priv->stage_list = g_slist_append (root->priv->stage_list, cally_stage); } root->priv->stage_added_id = g_signal_connect (G_OBJECT (stage_manager), "stage-added", G_CALLBACK (cally_util_stage_added_cb), root); root->priv->stage_removed_id = g_signal_connect (G_OBJECT (stage_manager), "stage-removed", G_CALLBACK (cally_util_stage_removed_cb), root); ATK_OBJECT_CLASS (cally_root_parent_class)->initialize (accessible, data); } static gint cally_root_get_n_children (AtkObject *obj) { CallyRoot *root = CALLY_ROOT (obj); return g_slist_length (root->priv->stage_list); } static AtkObject* cally_root_ref_child (AtkObject *obj, gint i) { CallyRoot *cally_root = NULL; GSList *stage_list = NULL; gint num = 0; AtkObject *item = NULL; cally_root = CALLY_ROOT (obj); stage_list = cally_root->priv->stage_list; num = g_slist_length (stage_list); g_return_val_if_fail ((i < num)&&(i >= 0), NULL); item = g_slist_nth_data (stage_list, i); if (!item) { return NULL; } g_object_ref (item); return item; } static AtkObject* cally_root_get_parent (AtkObject *obj) { return NULL; } /* -------------------------------- PRIVATE --------------------------------- */ static void cally_util_stage_added_cb (ClutterStageManager *stage_manager, ClutterStage *stage, gpointer data) { CallyRoot *root = CALLY_ROOT (data); AtkObject *cally_stage = NULL; gint index = -1; cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (stage)); atk_object_set_parent (cally_stage, ATK_OBJECT (root)); root->priv->stage_list = g_slist_append (root->priv->stage_list, cally_stage); index = g_slist_index (root->priv->stage_list, cally_stage); g_signal_emit_by_name (root, "children_changed::add", index, cally_stage, NULL); g_signal_emit_by_name (cally_stage, "create", 0); } static void cally_util_stage_removed_cb (ClutterStageManager *stage_manager, ClutterStage *stage, gpointer data) { CallyRoot *root = CALLY_ROOT (data); AtkObject *cally_stage = NULL; gint index = -1; cally_stage = clutter_actor_get_accessible (CLUTTER_ACTOR (stage)); index = g_slist_index (root->priv->stage_list, cally_stage); root->priv->stage_list = g_slist_remove (root->priv->stage_list, cally_stage); index = g_slist_index (root->priv->stage_list, cally_stage); g_signal_emit_by_name (root, "children_changed::remove", index, cally_stage, NULL); g_signal_emit_by_name (cally_stage, "destroy", 0); }