340 lines
10 KiB
C
340 lines
10 KiB
C
/* GTK+ - accessibility implementations
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gtknotebookpageaccessible.h"
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struct _GtkNotebookPageAccessiblePrivate
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{
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GtkAccessible *notebook;
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GtkWidget *child;
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};
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static void atk_component_interface_init (AtkComponentIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkNotebookPageAccessible, gtk_notebook_page_accessible, ATK_TYPE_OBJECT,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init))
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static GtkWidget *
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find_label_child (GtkContainer *container)
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{
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GList *children, *tmp_list;
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GtkWidget *child;
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children = gtk_container_get_children (container);
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child = 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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child = GTK_WIDGET (tmp_list->data);
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break;
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}
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else if (GTK_IS_CONTAINER (tmp_list->data))
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{
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child = find_label_child (GTK_CONTAINER (tmp_list->data));
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if (child)
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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 child;
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}
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static GtkWidget *
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get_label_from_notebook_page (GtkNotebookPageAccessible *page)
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{
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GtkWidget *child;
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GtkNotebook *notebook;
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notebook = GTK_NOTEBOOK (gtk_accessible_get_widget (page->priv->notebook));
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if (!notebook)
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return NULL;
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if (!gtk_notebook_get_show_tabs (notebook))
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return NULL;
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child = gtk_notebook_get_tab_label (notebook, page->priv->child);
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if (GTK_IS_LABEL (child))
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return child;
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if (GTK_IS_CONTAINER (child))
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child = find_label_child (GTK_CONTAINER (child));
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return child;
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}
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static const gchar *
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gtk_notebook_page_accessible_get_name (AtkObject *accessible)
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{
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GtkWidget *label;
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if (accessible->name != NULL)
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return accessible->name;
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label = get_label_from_notebook_page (GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible));
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if (GTK_IS_LABEL (label))
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return gtk_label_get_text (GTK_LABEL (label));
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return NULL;
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}
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static AtkObject *
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gtk_notebook_page_accessible_get_parent (AtkObject *accessible)
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{
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GtkNotebookPageAccessible *page;
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page = GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible);
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return ATK_OBJECT (page->priv->notebook);
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}
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static gint
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gtk_notebook_page_accessible_get_n_children (AtkObject *accessible)
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{
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return 1;
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}
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static AtkObject *
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gtk_notebook_page_accessible_ref_child (AtkObject *accessible,
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gint i)
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{
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AtkObject *child_obj;
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GtkNotebookPageAccessible *page = NULL;
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if (i != 0)
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return NULL;
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page = GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible);
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if (!page->priv->child)
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return NULL;
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child_obj = gtk_widget_get_accessible (page->priv->child);
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g_object_ref (child_obj);
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return child_obj;
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}
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static AtkStateSet *
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gtk_notebook_page_accessible_ref_state_set (AtkObject *accessible)
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{
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GtkNotebookPageAccessible *page = GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible);
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AtkStateSet *state_set, *label_state_set, *merged_state_set;
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AtkObject *atk_label;
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GtkWidget *label;
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AtkObject *selected;
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state_set = ATK_OBJECT_CLASS (gtk_notebook_page_accessible_parent_class)->ref_state_set (accessible);
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atk_state_set_add_state (state_set, ATK_STATE_SELECTABLE);
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selected = atk_selection_ref_selection (ATK_SELECTION (page->priv->notebook), 0);
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if (selected == accessible)
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atk_state_set_add_state (state_set, ATK_STATE_SELECTED);
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g_object_unref (selected);
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label = get_label_from_notebook_page (GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible));
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if (label)
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{
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atk_label = gtk_widget_get_accessible (label);
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label_state_set = atk_object_ref_state_set (atk_label);
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merged_state_set = atk_state_set_or_sets (state_set, label_state_set);
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g_object_unref (label_state_set);
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g_object_unref (state_set);
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}
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else
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{
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AtkObject *child;
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child = atk_object_ref_accessible_child (accessible, 0);
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if (!child)
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return state_set;
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merged_state_set = state_set;
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state_set = atk_object_ref_state_set (child);
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if (atk_state_set_contains_state (state_set, ATK_STATE_VISIBLE))
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{
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atk_state_set_add_state (merged_state_set, ATK_STATE_VISIBLE);
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if (atk_state_set_contains_state (state_set, ATK_STATE_ENABLED))
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atk_state_set_add_state (merged_state_set, ATK_STATE_ENABLED);
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if (atk_state_set_contains_state (state_set, ATK_STATE_SHOWING))
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atk_state_set_add_state (merged_state_set, ATK_STATE_SHOWING);
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}
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g_object_unref (state_set);
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g_object_unref (child);
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}
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return merged_state_set;
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}
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static gint
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gtk_notebook_page_accessible_get_index_in_parent (AtkObject *accessible)
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{
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GtkNotebookPageAccessible *page;
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page = GTK_NOTEBOOK_PAGE_ACCESSIBLE (accessible);
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if (!page->priv->child)
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return -1;
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return gtk_notebook_page_num (GTK_NOTEBOOK (gtk_accessible_get_widget (page->priv->notebook)),
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page->priv->child);
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}
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static void
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gtk_notebook_page_accessible_class_init (GtkNotebookPageAccessibleClass *klass)
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{
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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class->get_name = gtk_notebook_page_accessible_get_name;
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class->get_parent = gtk_notebook_page_accessible_get_parent;
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class->get_n_children = gtk_notebook_page_accessible_get_n_children;
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class->ref_child = gtk_notebook_page_accessible_ref_child;
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class->ref_state_set = gtk_notebook_page_accessible_ref_state_set;
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class->get_index_in_parent = gtk_notebook_page_accessible_get_index_in_parent;
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g_type_class_add_private (klass, sizeof (GtkNotebookPageAccessiblePrivate));
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}
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static void
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gtk_notebook_page_accessible_init (GtkNotebookPageAccessible *page)
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{
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page->priv = G_TYPE_INSTANCE_GET_PRIVATE (page,
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GTK_TYPE_NOTEBOOK_PAGE_ACCESSIBLE,
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GtkNotebookPageAccessiblePrivate);
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}
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static void
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notify_tab_label (GObject *object,
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GParamSpec *pspec,
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AtkObject *atk_obj)
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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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AtkObject *
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gtk_notebook_page_accessible_new (GtkNotebookAccessible *notebook,
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GtkWidget *child)
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{
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GObject *object;
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AtkObject *atk_object;
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GtkNotebookPageAccessible *page;
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g_return_val_if_fail (GTK_IS_NOTEBOOK_ACCESSIBLE (notebook), NULL);
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g_return_val_if_fail (GTK_WIDGET (child), NULL);
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object = g_object_new (GTK_TYPE_NOTEBOOK_PAGE_ACCESSIBLE, NULL);
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page = GTK_NOTEBOOK_PAGE_ACCESSIBLE (object);
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page->priv->notebook = GTK_ACCESSIBLE (notebook);
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page->priv->child = child;
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atk_object = ATK_OBJECT (page);
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atk_object->role = ATK_ROLE_PAGE_TAB;
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atk_object->layer = ATK_LAYER_WIDGET;
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atk_object_set_parent (gtk_widget_get_accessible (child), atk_object);
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g_signal_connect (gtk_accessible_get_widget (page->priv->notebook),
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"child-notify::tab-label",
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G_CALLBACK (notify_tab_label), page);
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return atk_object;
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}
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void
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gtk_notebook_page_accessible_invalidate (GtkNotebookPageAccessible *page)
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{
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AtkObject *obj = ATK_OBJECT (page);
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GtkWidget *notebook;
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notebook = gtk_accessible_get_widget (page->priv->notebook);
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if (notebook)
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g_signal_handlers_disconnect_by_func (notebook, notify_tab_label, page);
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atk_object_notify_state_change (obj, ATK_STATE_DEFUNCT, TRUE);
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atk_object_set_parent (obj, NULL);
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page->priv->notebook = NULL;
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atk_object_set_parent (gtk_widget_get_accessible (page->priv->child), NULL);
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page->priv->child = NULL;
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}
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static AtkObject*
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gtk_notebook_page_accessible_ref_accessible_at_point (AtkComponent *component,
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gint x,
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gint y,
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AtkCoordType coord_type)
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{
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/* There is only one child so we return it */
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AtkObject* child;
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child = atk_object_ref_accessible_child (ATK_OBJECT (component), 0);
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return child;
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}
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static void
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gtk_notebook_page_accessible_get_extents (AtkComponent *component,
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gint *x,
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gint *y,
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gint *width,
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gint *height,
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AtkCoordType coord_type)
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{
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GtkWidget *label;
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AtkObject *atk_label;
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label = get_label_from_notebook_page (GTK_NOTEBOOK_PAGE_ACCESSIBLE (component));
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if (!label)
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{
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AtkObject *child;
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*width = 0;
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*height = 0;
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child = atk_object_ref_accessible_child (ATK_OBJECT (component), 0);
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if (!child)
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return;
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atk_component_get_position (ATK_COMPONENT (child), x, y, coord_type);
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g_object_unref (child);
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}
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else
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{
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atk_label = gtk_widget_get_accessible (label);
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atk_component_get_extents (ATK_COMPONENT (atk_label),
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x, y, width, height, coord_type);
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}
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}
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static void
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atk_component_interface_init (AtkComponentIface *iface)
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{
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/* We use the default implementations for contains, get_position, get_size */
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iface->ref_accessible_at_point = gtk_notebook_page_accessible_ref_accessible_at_point;
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iface->get_extents = gtk_notebook_page_accessible_get_extents;
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}
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