forked from AuroraMiddleware/gtk
af4b26f581
Old code assumed that AT-SPI would keep track of references and therefore tried to only hold weak references. On the other hand it also tried to keep objects alive so it referenced objects very randomly. All of that lead to cycles and leaking. As AT-SPI does not keep track of objects at all, the treeview now does. The refcounting looks as follows: GtkTreeViewAccessible => creates per row/column GtkTreeViewAccessibleCellInfo => which references 1 GtkCellAccessible If there is only one cell, this accessible is a GtkRendererCellAccessible, otherwise a GtkContainerCellAccessible is created and that accessible holds references to the GtkRendererCellAccessibles that are created for every cell renderer. https://bugzilla.gnome.org/show_bug.cgi?id=554618
455 lines
14 KiB
C
455 lines
14 KiB
C
/* GTK+ - accessibility implementations
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* Copyright 2001 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 <glib/gi18n-lib.h>
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#include <gtk/gtk.h>
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#include "gtkcontainercellaccessible.h"
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#include "gtkcellaccessibleprivate.h"
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#include "gtkcellaccessibleparent.h"
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struct _GtkCellAccessiblePrivate
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{
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AtkObject *parent;
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};
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static const struct {
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AtkState atk_state;
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GtkCellRendererState renderer_state;
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gboolean invert;
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} state_map[] = {
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{ ATK_STATE_SENSITIVE, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
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{ ATK_STATE_ENABLED, GTK_CELL_RENDERER_INSENSITIVE, TRUE },
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{ ATK_STATE_SELECTED, GTK_CELL_RENDERER_SELECTED, FALSE },
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/* XXX: why do we map ACTIVE here? */
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{ ATK_STATE_ACTIVE, GTK_CELL_RENDERER_FOCUSED, FALSE },
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{ ATK_STATE_FOCUSED, GTK_CELL_RENDERER_FOCUSED, FALSE },
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{ ATK_STATE_EXPANDABLE,GTK_CELL_RENDERER_EXPANDABLE, FALSE },
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{ ATK_STATE_EXPANDED, GTK_CELL_RENDERER_EXPANDED, FALSE },
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};
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static GtkCellRendererState gtk_cell_accessible_get_state (GtkCellAccessible *cell);
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static void atk_action_interface_init (AtkActionIface *iface);
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static void atk_component_interface_init (AtkComponentIface *iface);
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G_DEFINE_TYPE_WITH_CODE (GtkCellAccessible, gtk_cell_accessible, GTK_TYPE_ACCESSIBLE,
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G_ADD_PRIVATE (GtkCellAccessible)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
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G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init))
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static void
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gtk_cell_accessible_object_finalize (GObject *obj)
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{
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AtkRelationSet *relation_set;
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AtkRelation *relation;
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GPtrArray *target;
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gpointer target_object;
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gint i;
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relation_set = atk_object_ref_relation_set (ATK_OBJECT (obj));
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if (ATK_IS_RELATION_SET (relation_set))
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{
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relation = atk_relation_set_get_relation_by_type (relation_set,
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ATK_RELATION_NODE_CHILD_OF);
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if (relation)
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{
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target = atk_relation_get_target (relation);
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for (i = 0; i < target->len; i++)
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{
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target_object = g_ptr_array_index (target, i);
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if (GTK_IS_CELL_ACCESSIBLE (target_object))
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g_object_unref (target_object);
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}
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}
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g_object_unref (relation_set);
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}
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G_OBJECT_CLASS (gtk_cell_accessible_parent_class)->finalize (obj);
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}
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static gint
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gtk_cell_accessible_get_index_in_parent (AtkObject *obj)
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{
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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (obj);
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (cell->priv->parent))
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return g_list_index (gtk_container_cell_accessible_get_children (GTK_CONTAINER_CELL_ACCESSIBLE (cell->priv->parent)), obj);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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if (parent == NULL)
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return -1;
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return gtk_cell_accessible_parent_get_child_index (GTK_CELL_ACCESSIBLE_PARENT (cell->priv->parent), cell);
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}
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static AtkStateSet *
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gtk_cell_accessible_ref_state_set (AtkObject *accessible)
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{
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GtkCellAccessible *cell_accessible;
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AtkStateSet *state_set;
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GtkCellRendererState flags;
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guint i;
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cell_accessible = GTK_CELL_ACCESSIBLE (accessible);
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state_set = atk_state_set_new ();
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if (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell_accessible)) == NULL)
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{
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atk_state_set_add_state (state_set, ATK_STATE_DEFUNCT);
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return state_set;
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}
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flags = gtk_cell_accessible_get_state (cell_accessible);
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atk_state_set_add_state (state_set, ATK_STATE_FOCUSABLE);
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atk_state_set_add_state (state_set, ATK_STATE_SELECTABLE);
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atk_state_set_add_state (state_set, ATK_STATE_TRANSIENT);
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atk_state_set_add_state (state_set, ATK_STATE_VISIBLE);
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for (i = 0; i < G_N_ELEMENTS (state_map); i++)
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{
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if (flags & state_map[i].renderer_state)
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{
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if (!state_map[i].invert)
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atk_state_set_add_state (state_set, state_map[i].atk_state);
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}
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else
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{
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if (state_map[i].invert)
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atk_state_set_add_state (state_set, state_map[i].atk_state);
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}
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}
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if (gtk_widget_get_mapped (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell_accessible))))
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atk_state_set_add_state (state_set, ATK_STATE_SHOWING);
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return state_set;
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}
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static AtkObject *
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gtk_cell_accessible_get_parent (AtkObject *object)
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{
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GtkCellAccessible *cell = GTK_CELL_ACCESSIBLE (object);
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return cell->priv->parent;
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}
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static void
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gtk_cell_accessible_class_init (GtkCellAccessibleClass *klass)
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{
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
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g_object_class->finalize = gtk_cell_accessible_object_finalize;
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class->get_index_in_parent = gtk_cell_accessible_get_index_in_parent;
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class->ref_state_set = gtk_cell_accessible_ref_state_set;
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class->get_parent = gtk_cell_accessible_get_parent;
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}
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static void
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gtk_cell_accessible_init (GtkCellAccessible *cell)
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{
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cell->priv = gtk_cell_accessible_get_instance_private (cell);
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}
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void
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_gtk_cell_accessible_initialize (GtkCellAccessible *cell,
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GtkWidget *widget,
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AtkObject *parent)
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{
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gtk_accessible_set_widget (GTK_ACCESSIBLE (cell), widget);
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cell->priv->parent = parent;
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}
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gboolean
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_gtk_cell_accessible_add_state (GtkCellAccessible *cell,
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AtkStateType state_type,
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gboolean emit_signal)
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{
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/* The signal should only be generated if the value changed,
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* not when the cell is set up. So states that are set
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* initially should pass FALSE as the emit_signal argument.
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*/
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if (emit_signal)
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{
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atk_object_notify_state_change (ATK_OBJECT (cell), state_type, TRUE);
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/* If state_type is ATK_STATE_VISIBLE, additional notification */
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if (state_type == ATK_STATE_VISIBLE)
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g_signal_emit_by_name (cell, "visible-data-changed");
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}
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/* If the parent is a flyweight container cell, propagate the state
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* change to it also
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*/
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (cell->priv->parent))
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_gtk_cell_accessible_add_state (GTK_CELL_ACCESSIBLE (cell->priv->parent), state_type, emit_signal);
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return TRUE;
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}
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gboolean
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_gtk_cell_accessible_remove_state (GtkCellAccessible *cell,
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AtkStateType state_type,
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gboolean emit_signal)
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{
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/* The signal should only be generated if the value changed,
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* not when the cell is set up. So states that are set
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* initially should pass FALSE as the emit_signal argument.
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*/
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if (emit_signal)
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{
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atk_object_notify_state_change (ATK_OBJECT (cell), state_type, FALSE);
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/* If state_type is ATK_STATE_VISIBLE, additional notification */
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if (state_type == ATK_STATE_VISIBLE)
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g_signal_emit_by_name (cell, "visible-data-changed");
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}
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/* If the parent is a flyweight container cell, propagate the state
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* change to it also
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*/
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if (GTK_IS_CONTAINER_CELL_ACCESSIBLE (cell->priv->parent))
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_gtk_cell_accessible_remove_state (GTK_CELL_ACCESSIBLE (cell->priv->parent), state_type, emit_signal);
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return TRUE;
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}
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static gint
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gtk_cell_accessible_action_get_n_actions (AtkAction *action)
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{
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return 3;
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}
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static const gchar *
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gtk_cell_accessible_action_get_name (AtkAction *action,
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gint index)
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{
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switch (index)
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{
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case 0:
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return "expand or contract";
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case 1:
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return "edit";
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case 2:
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return "activate";
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default:
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return NULL;
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}
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}
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static const gchar *
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gtk_cell_accessible_action_get_localized_name (AtkAction *action,
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gint index)
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{
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switch (index)
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{
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case 0:
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return C_("Action name", "Expand or contract");
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case 1:
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return C_("Action name", "Edit");
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case 2:
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return C_("Action name", "Activate");
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default:
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return NULL;
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}
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}
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static const gchar *
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gtk_cell_accessible_action_get_description (AtkAction *action,
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gint index)
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{
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switch (index)
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{
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case 0:
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return C_("Action description", "Expands or contracts the row in the tree view containing this cell");
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case 1:
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return C_("Action description", "Creates a widget in which the contents of the cell can be edited");
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case 2:
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return C_("Action description", "Activates the cell");
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default:
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return NULL;
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}
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}
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static const gchar *
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gtk_cell_accessible_action_get_keybinding (AtkAction *action,
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gint index)
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{
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return NULL;
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}
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static gboolean
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gtk_cell_accessible_action_do_action (AtkAction *action,
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gint index)
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{
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GtkCellAccessible *cell = GTK_CELL_ACCESSIBLE (action);
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GtkCellAccessibleParent *parent;
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cell = GTK_CELL_ACCESSIBLE (action);
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if (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)) == NULL)
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return FALSE;
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parent = GTK_CELL_ACCESSIBLE_PARENT (gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell))));
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switch (index)
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{
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case 0:
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gtk_cell_accessible_parent_expand_collapse (parent, cell);
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break;
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case 1:
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gtk_cell_accessible_parent_edit (parent, cell);
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break;
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case 2:
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gtk_cell_accessible_parent_activate (parent, cell);
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break;
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default:
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return FALSE;
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}
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return TRUE;
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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->get_n_actions = gtk_cell_accessible_action_get_n_actions;
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iface->do_action = gtk_cell_accessible_action_do_action;
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iface->get_name = gtk_cell_accessible_action_get_name;
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iface->get_localized_name = gtk_cell_accessible_action_get_localized_name;
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iface->get_description = gtk_cell_accessible_action_get_description;
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iface->get_keybinding = gtk_cell_accessible_action_get_keybinding;
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}
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static void
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gtk_cell_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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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (component);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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gtk_cell_accessible_parent_get_cell_extents (GTK_CELL_ACCESSIBLE_PARENT (parent),
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cell,
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x, y, width, height, coord_type);
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}
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static gboolean
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gtk_cell_accessible_grab_focus (AtkComponent *component)
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{
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GtkCellAccessible *cell;
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AtkObject *parent;
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cell = GTK_CELL_ACCESSIBLE (component);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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return gtk_cell_accessible_parent_grab_focus (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
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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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iface->get_extents = gtk_cell_accessible_get_extents;
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iface->grab_focus = gtk_cell_accessible_grab_focus;
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}
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static GtkCellRendererState
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gtk_cell_accessible_get_state (GtkCellAccessible *cell)
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{
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AtkObject *parent;
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g_return_val_if_fail (GTK_IS_CELL_ACCESSIBLE (cell), 0);
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parent = gtk_widget_get_accessible (gtk_accessible_get_widget (GTK_ACCESSIBLE (cell)));
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if (parent == NULL)
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return 0;
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return gtk_cell_accessible_parent_get_renderer_state (GTK_CELL_ACCESSIBLE_PARENT (parent), cell);
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}
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/*
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* gtk_cell_accessible_state_changed:
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* @cell: a #GtkCellAccessible
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* @added: the flags that were added from @cell
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* @removed: the flags that were removed from @cell
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*
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* Notifies @cell of state changes. Multiple states may be added
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* or removed at the same time. A state that is @added may not be
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* @removed at the same time.
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**/
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void
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_gtk_cell_accessible_state_changed (GtkCellAccessible *cell,
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GtkCellRendererState added,
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GtkCellRendererState removed)
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{
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AtkObject *object;
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guint i;
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g_return_if_fail (GTK_IS_CELL_ACCESSIBLE (cell));
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g_return_if_fail ((added & removed) == 0);
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object = ATK_OBJECT (cell);
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for (i = 0; i < G_N_ELEMENTS (state_map); i++)
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{
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if (added & state_map[i].renderer_state)
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atk_object_notify_state_change (object,
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state_map[i].atk_state,
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!state_map[i].invert);
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if (removed & state_map[i].renderer_state)
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atk_object_notify_state_change (object,
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state_map[i].atk_state,
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state_map[i].invert);
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}
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}
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/*
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* gtk_cell_accessible_update_cache:
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* @cell: the cell that is changed
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*
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* Notifies the cell that the values in the data in the row that
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* is used to feed the cell renderer with has changed. The
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* cell_changed function of @cell is called to send update
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* notifications for the properties it takes from its cell
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* renderer.
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*
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* Note that there is no higher granularity available about which
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* properties changed, so you will need to make do with this
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* function.
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**/
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void
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_gtk_cell_accessible_update_cache (GtkCellAccessible *cell)
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{
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GtkCellAccessibleClass *klass;
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g_return_if_fail (GTK_CELL_ACCESSIBLE (cell));
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klass = GTK_CELL_ACCESSIBLE_GET_CLASS (cell);
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if (klass->update_cache)
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klass->update_cache (cell);
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}
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