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gtk/modules/other/gail/gailcell.c

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/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001 Sun Microsystems Inc.
*
* 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.
*/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include "gailcontainercell.h"
#include "gailcell.h"
#include "gailcellparent.h"
static void gail_cell_class_init (GailCellClass *klass);
static void gail_cell_destroyed (GtkWidget *widget,
GailCell *cell);
static void gail_cell_init (GailCell *cell);
static void gail_cell_object_finalize (GObject *cell);
static AtkStateSet* gail_cell_ref_state_set (AtkObject *obj);
static gint gail_cell_get_index_in_parent (AtkObject *obj);
/* AtkAction */
static void atk_action_interface_init
(AtkActionIface *iface);
static ActionInfo * _gail_cell_get_action_info (GailCell *cell,
gint index);
static void _gail_cell_destroy_action_info
(gpointer data,
gpointer user_data);
static gint gail_cell_action_get_n_actions
(AtkAction *action);
static G_CONST_RETURN gchar*
gail_cell_action_get_name (AtkAction *action,
gint index);
static G_CONST_RETURN gchar *
gail_cell_action_get_description
(AtkAction *action,
gint index);
static gboolean gail_cell_action_set_description
(AtkAction *action,
gint index,
const gchar *desc);
static G_CONST_RETURN gchar *
gail_cell_action_get_keybinding
(AtkAction *action,
gint index);
static gboolean gail_cell_action_do_action (AtkAction *action,
gint index);
static gboolean idle_do_action (gpointer data);
static void atk_component_interface_init (AtkComponentIface *iface);
static void gail_cell_get_extents (AtkComponent *component,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coord_type);
static gboolean gail_cell_grab_focus (AtkComponent *component);
G_DEFINE_TYPE_WITH_CODE (GailCell, gail_cell, ATK_TYPE_OBJECT,
G_IMPLEMENT_INTERFACE (ATK_TYPE_ACTION, atk_action_interface_init)
G_IMPLEMENT_INTERFACE (ATK_TYPE_COMPONENT, atk_component_interface_init))
static void
gail_cell_class_init (GailCellClass *klass)
{
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GObjectClass *g_object_class = G_OBJECT_CLASS (klass);
g_object_class->finalize = gail_cell_object_finalize;
class->get_index_in_parent = gail_cell_get_index_in_parent;
class->ref_state_set = gail_cell_ref_state_set;
}
void
gail_cell_initialise (GailCell *cell,
GtkWidget *widget,
AtkObject *parent,
gint index)
{
g_return_if_fail (GAIL_IS_CELL (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
cell->widget = widget;
atk_object_set_parent (ATK_OBJECT (cell), parent);
cell->index = index;
g_signal_connect_object (G_OBJECT (widget),
"destroy",
G_CALLBACK (gail_cell_destroyed ),
cell, 0);
}
static void
gail_cell_destroyed (GtkWidget *widget,
GailCell *cell)
{
/*
* This is the signal handler for the "destroy" signal for the
* GtkWidget. We set the pointer location to NULL;
*/
cell->widget = NULL;
}
static void
gail_cell_init (GailCell *cell)
{
cell->state_set = atk_state_set_new ();
cell->widget = NULL;
cell->action_list = NULL;
cell->index = 0;
atk_state_set_add_state (cell->state_set, ATK_STATE_TRANSIENT);
atk_state_set_add_state (cell->state_set, ATK_STATE_ENABLED);
atk_state_set_add_state (cell->state_set, ATK_STATE_SENSITIVE);
atk_state_set_add_state (cell->state_set, ATK_STATE_SELECTABLE);
cell->refresh_index = NULL;
}
static void
gail_cell_object_finalize (GObject *obj)
{
GailCell *cell = GAIL_CELL (obj);
AtkRelationSet *relation_set;
AtkRelation *relation;
GPtrArray *target;
gpointer target_object;
gint i;
if (cell->state_set)
g_object_unref (cell->state_set);
if (cell->action_list)
{
g_list_foreach (cell->action_list, _gail_cell_destroy_action_info, NULL);
g_list_free (cell->action_list);
}
if (cell->action_idle_handler)
{
g_source_remove (cell->action_idle_handler);
cell->action_idle_handler = 0;
}
relation_set = atk_object_ref_relation_set (ATK_OBJECT (obj));
if (ATK_IS_RELATION_SET (relation_set))
{
relation = atk_relation_set_get_relation_by_type (relation_set,
ATK_RELATION_NODE_CHILD_OF);
if (relation)
{
target = atk_relation_get_target (relation);
for (i = 0; i < target->len; i++)
{
target_object = g_ptr_array_index (target, i);
if (GAIL_IS_CELL (target_object))
{
g_object_unref (target_object);
}
}
}
g_object_unref (relation_set);
}
G_OBJECT_CLASS (gail_cell_parent_class)->finalize (obj);
}
static AtkStateSet *
gail_cell_ref_state_set (AtkObject *obj)
{
GailCell *cell = GAIL_CELL (obj);
g_assert (cell->state_set);
g_object_ref(cell->state_set);
return cell->state_set;
}
gboolean
gail_cell_add_state (GailCell *cell,
AtkStateType state_type,
gboolean emit_signal)
{
if (!atk_state_set_contains_state (cell->state_set, state_type))
{
gboolean rc;
AtkObject *parent;
rc = atk_state_set_add_state (cell->state_set, state_type);
/*
* The signal should only be generated if the value changed,
* not when the cell is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (cell), state_type, TRUE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (cell, "visible_data_changed");
}
/*
* If the parent is a flyweight container cell, propagate the state
* change to it also
*/
parent = atk_object_get_parent (ATK_OBJECT (cell));
if (GAIL_IS_CONTAINER_CELL (parent))
gail_cell_add_state (GAIL_CELL (parent), state_type, emit_signal);
return rc;
}
else
return FALSE;
}
gboolean
gail_cell_remove_state (GailCell *cell,
AtkStateType state_type,
gboolean emit_signal)
{
if (atk_state_set_contains_state (cell->state_set, state_type))
{
gboolean rc;
AtkObject *parent;
parent = atk_object_get_parent (ATK_OBJECT (cell));
rc = atk_state_set_remove_state (cell->state_set, state_type);
/*
* The signal should only be generated if the value changed,
* not when the cell is set up. So states that are set
* initially should pass FALSE as the emit_signal argument.
*/
if (emit_signal)
{
atk_object_notify_state_change (ATK_OBJECT (cell), state_type, FALSE);
/* If state_type is ATK_STATE_VISIBLE, additional notification */
if (state_type == ATK_STATE_VISIBLE)
g_signal_emit_by_name (cell, "visible_data_changed");
}
/*
* If the parent is a flyweight container cell, propagate the state
* change to it also
*/
if (GAIL_IS_CONTAINER_CELL (parent))
gail_cell_remove_state (GAIL_CELL (parent), state_type, emit_signal);
return rc;
}
else
return FALSE;
}
static gint
gail_cell_get_index_in_parent (AtkObject *obj)
{
GailCell *cell;
g_assert (GAIL_IS_CELL (obj));
cell = GAIL_CELL (obj);
if (atk_state_set_contains_state (cell->state_set, ATK_STATE_STALE))
if (cell->refresh_index)
{
cell->refresh_index (cell);
atk_state_set_remove_state (cell->state_set, ATK_STATE_STALE);
}
return cell->index;
}
static void
atk_action_interface_init (AtkActionIface *iface)
{
iface->get_n_actions = gail_cell_action_get_n_actions;
iface->do_action = gail_cell_action_do_action;
iface->get_name = gail_cell_action_get_name;
iface->get_description = gail_cell_action_get_description;
iface->set_description = gail_cell_action_set_description;
iface->get_keybinding = gail_cell_action_get_keybinding;
}
/*
* Deprecated: 2.22: The action interface is added for all cells now.
*/
void
gail_cell_type_add_action_interface (GType type)
{
}
gboolean
gail_cell_add_action (GailCell *cell,
const gchar *action_name,
const gchar *action_description,
const gchar *action_keybinding,
ACTION_FUNC action_func)
{
ActionInfo *info;
g_return_val_if_fail (GAIL_IS_CELL (cell), FALSE);
info = g_new (ActionInfo, 1);
if (action_name != NULL)
info->name = g_strdup (action_name);
else
info->name = NULL;
if (action_description != NULL)
info->description = g_strdup (action_description);
else
info->description = NULL;
if (action_keybinding != NULL)
info->keybinding = g_strdup (action_keybinding);
else
info->keybinding = NULL;
info->do_action_func = action_func;
cell->action_list = g_list_append (cell->action_list, (gpointer) info);
return TRUE;
}
gboolean
gail_cell_remove_action (GailCell *cell,
gint action_index)
{
GList *list_node;
g_return_val_if_fail (GAIL_IS_CELL (cell), FALSE);
list_node = g_list_nth (cell->action_list, action_index);
if (!list_node)
return FALSE;
_gail_cell_destroy_action_info (list_node->data, NULL);
cell->action_list = g_list_remove_link (cell->action_list, list_node);
return TRUE;
}
gboolean
gail_cell_remove_action_by_name (GailCell *cell,
const gchar *action_name)
{
GList *list_node;
gboolean action_found= FALSE;
g_return_val_if_fail (GAIL_IS_CELL (cell), FALSE);
for (list_node = cell->action_list; list_node && !action_found;
list_node = list_node->next)
{
if (!strcmp (((ActionInfo *)(list_node->data))->name, action_name))
{
action_found = TRUE;
break;
}
}
if (!action_found)
return FALSE;
_gail_cell_destroy_action_info (list_node->data, NULL);
cell->action_list = g_list_remove_link (cell->action_list, list_node);
return TRUE;
}
static ActionInfo *
_gail_cell_get_action_info (GailCell *cell,
gint index)
{
GList *list_node;
g_return_val_if_fail (GAIL_IS_CELL (cell), NULL);
if (cell->action_list == NULL)
return NULL;
list_node = g_list_nth (cell->action_list, index);
if (!list_node)
return NULL;
return (ActionInfo *) (list_node->data);
}
static void
_gail_cell_destroy_action_info (gpointer action_info,
gpointer user_data)
{
ActionInfo *info = (ActionInfo *)action_info;
g_assert (info != NULL);
g_free (info->name);
g_free (info->description);
g_free (info->keybinding);
g_free (info);
}
static gint
gail_cell_action_get_n_actions (AtkAction *action)
{
GailCell *cell = GAIL_CELL(action);
if (cell->action_list != NULL)
return g_list_length (cell->action_list);
else
return 0;
}
static G_CONST_RETURN gchar *
gail_cell_action_get_name (AtkAction *action,
gint index)
{
GailCell *cell = GAIL_CELL(action);
ActionInfo *info = _gail_cell_get_action_info (cell, index);
if (info == NULL)
return NULL;
return info->name;
}
static G_CONST_RETURN gchar *
gail_cell_action_get_description (AtkAction *action,
gint index)
{
GailCell *cell = GAIL_CELL(action);
ActionInfo *info = _gail_cell_get_action_info (cell, index);
if (info == NULL)
return NULL;
return info->description;
}
static gboolean
gail_cell_action_set_description (AtkAction *action,
gint index,
const gchar *desc)
{
GailCell *cell = GAIL_CELL(action);
ActionInfo *info = _gail_cell_get_action_info (cell, index);
if (info == NULL)
return FALSE;
g_free (info->description);
info->description = g_strdup (desc);
return TRUE;
}
static G_CONST_RETURN gchar *
gail_cell_action_get_keybinding (AtkAction *action,
gint index)
{
GailCell *cell = GAIL_CELL(action);
ActionInfo *info = _gail_cell_get_action_info (cell, index);
if (info == NULL)
return NULL;
return info->keybinding;
}
static gboolean
gail_cell_action_do_action (AtkAction *action,
gint index)
{
GailCell *cell = GAIL_CELL(action);
ActionInfo *info = _gail_cell_get_action_info (cell, index);
if (info == NULL)
return FALSE;
if (info->do_action_func == NULL)
return FALSE;
if (cell->action_idle_handler)
return FALSE;
cell->action_func = info->do_action_func;
cell->action_idle_handler = gdk_threads_add_idle (idle_do_action, cell);
return TRUE;
}
static gboolean
idle_do_action (gpointer data)
{
GailCell *cell;
cell = GAIL_CELL (data);
cell->action_idle_handler = 0;
cell->action_func (cell);
return FALSE;
}
static void
atk_component_interface_init (AtkComponentIface *iface)
{
iface->get_extents = gail_cell_get_extents;
iface->grab_focus = gail_cell_grab_focus;
}
static void
gail_cell_get_extents (AtkComponent *component,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coord_type)
{
GailCell *gailcell;
AtkObject *cell_parent;
g_assert (GAIL_IS_CELL (component));
gailcell = GAIL_CELL (component);
cell_parent = gtk_widget_get_accessible (gailcell->widget);
gail_cell_parent_get_cell_extents (GAIL_CELL_PARENT (cell_parent),
gailcell, x, y, width, height, coord_type);
}
static gboolean
gail_cell_grab_focus (AtkComponent *component)
{
GailCell *gailcell;
AtkObject *cell_parent;
g_assert (GAIL_IS_CELL (component));
gailcell = GAIL_CELL (component);
cell_parent = gtk_widget_get_accessible (gailcell->widget);
return gail_cell_parent_grab_focus (GAIL_CELL_PARENT (cell_parent),
gailcell);
}
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