/* GAIL - The GNOME Accessibility Implementation Library
* Copyright 2001, 2002, 2003 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>
#undef GTK_DISABLE_DEPRECATED
#include <gtk/gtk.h>
#include "gailitem.h"
#include <libgail-util/gailmisc.h>
static void gail_item_class_init (GailItemClass *klass);
static void gail_item_init (GailItem *item);
static const gchar* gail_item_get_name (AtkObject *obj);
static gint gail_item_get_n_children (AtkObject *obj);
static AtkObject* gail_item_ref_child (AtkObject *obj,
gint i);
static void gail_item_real_initialize (AtkObject *obj,
gpointer data);
static void gail_item_label_map_gtk (GtkWidget *widget,
gpointer data);
static void gail_item_finalize (GObject *object);
static void gail_item_init_textutil (GailItem *item,
GtkWidget *label);
static void gail_item_notify_label_gtk(GObject *obj,
GParamSpec *pspec,
gpointer data);
/* atktext.h */
static void atk_text_interface_init (AtkTextIface *iface);
static gchar* gail_item_get_text (AtkText *text,
gint start_pos,
gint end_pos);
static gunichar gail_item_get_character_at_offset(AtkText *text,
gint offset);
static gchar* gail_item_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_item_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gchar* gail_item_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset);
static gint gail_item_get_character_count (AtkText *text);
static void gail_item_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords);
static gint gail_item_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords);
static AtkAttributeSet* gail_item_get_run_attributes
(AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset);
static AtkAttributeSet* gail_item_get_default_attributes
(AtkText *text);
static GtkWidget* get_label_from_container (GtkWidget *container);
G_DEFINE_TYPE_WITH_CODE (GailItem, gail_item, GAIL_TYPE_CONTAINER,
G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init))
static void
gail_item_class_init (GailItemClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
GailContainerClass *container_class;
container_class = (GailContainerClass *)klass;
gobject_class->finalize = gail_item_finalize;
class->get_name = gail_item_get_name;
class->get_n_children = gail_item_get_n_children;
class->ref_child = gail_item_ref_child;
class->initialize = gail_item_real_initialize;
/*
* As we report the item as having no children we are not interested
* in add and remove signals
*/
container_class->add_gtk = NULL;
container_class->remove_gtk = NULL;
}
static void
gail_item_init (GailItem *item)
{
}
static void
gail_item_real_initialize (AtkObject *obj,
gpointer data)
{
GailItem *item = GAIL_ITEM (obj);
GtkWidget *label;
ATK_OBJECT_CLASS (gail_item_parent_class)->initialize (obj, data);
item->textutil = NULL;
item->text = NULL;
label = get_label_from_container (GTK_WIDGET (data));
if (GTK_IS_LABEL (label))
{
if (gtk_widget_get_mapped (label))
gail_item_init_textutil (item, label);
else
g_signal_connect (label,
"map",
G_CALLBACK (gail_item_label_map_gtk),
item);
}
obj->role = ATK_ROLE_LIST_ITEM;
}
static void
gail_item_label_map_gtk (GtkWidget *widget,
gpointer data)
{
GailItem *item;
item = GAIL_ITEM (data);
gail_item_init_textutil (item, widget);
}
static void
gail_item_init_textutil (GailItem *item,
GtkWidget *label)
{
const gchar *label_text;
if (item->textutil == NULL)
{
item->textutil = gail_text_util_new ();
g_signal_connect (label,
"notify",
(GCallback) gail_item_notify_label_gtk,
item);
}
label_text = gtk_label_get_text (GTK_LABEL (label));
gail_text_util_text_setup (item->textutil, label_text);
}
static void
gail_item_finalize (GObject *object)
{
GailItem *item = GAIL_ITEM (object);
if (item->textutil)
{
g_object_unref (item->textutil);
}
if (item->text)
{
g_free (item->text);
item->text = NULL;
}
G_OBJECT_CLASS (gail_item_parent_class)->finalize (object);
}
static const gchar*
gail_item_get_name (AtkObject *obj)
{
const gchar* name;
g_return_val_if_fail (GAIL_IS_ITEM (obj), NULL);
name = ATK_OBJECT_CLASS (gail_item_parent_class)->get_name (obj);
if (name == NULL)
{
/*
* Get the label child
*/
GtkWidget *widget;
GtkWidget *label;
widget = GTK_ACCESSIBLE (obj)->widget;
if (widget == NULL)
/*
* State is defunct
*/
return NULL;
label = get_label_from_container (widget);
if (GTK_IS_LABEL (label))
return gtk_label_get_text (GTK_LABEL(label));
/*
* If we have a menu item in a menu attached to a GtkOptionMenu
* the label of the selected item is detached from the menu item
*/
else if (GTK_IS_MENU_ITEM (widget))
{
GtkWidget *parent;
GtkWidget *attach;
GList *list;
AtkObject *parent_obj;
gint index;
parent = gtk_widget_get_parent (widget);
if (GTK_IS_MENU (parent))
{
attach = gtk_menu_get_attach_widget (GTK_MENU (parent));
if (GTK_IS_OPTION_MENU (attach))
{
label = get_label_from_container (attach);
if (GTK_IS_LABEL (label))
return gtk_label_get_text (GTK_LABEL(label));
}
list = gtk_container_get_children (GTK_CONTAINER (parent));
index = g_list_index (list, widget);
if (index < 0 || index > g_list_length (list))
{
g_list_free (list);
return NULL;
}
g_list_free (list);
parent_obj = atk_object_get_parent (gtk_widget_get_accessible (parent));
if (GTK_IS_ACCESSIBLE (parent_obj))
{
parent = GTK_ACCESSIBLE (parent_obj)->widget;
if (GTK_IS_COMBO_BOX (parent))
{
GtkTreeModel *model;
GtkTreeIter iter;
GailItem *item;
gint n_columns, i;
model = gtk_combo_box_get_model (GTK_COMBO_BOX (parent));
item = GAIL_ITEM (obj);
if (gtk_tree_model_iter_nth_child (model, &iter, NULL, index))
{
n_columns = gtk_tree_model_get_n_columns (model);
for (i = 0; i < n_columns; i++)
{
GValue value = { 0, };
gtk_tree_model_get_value (model, &iter, i, &value);
if (G_VALUE_HOLDS_STRING (&value))
{
g_free (item->text);
item->text = (gchar *) g_value_dup_string (&value);
g_value_unset (&value);
break;
}
g_value_unset (&value);
}
}
name = item->text;
}
}
}
}
}
return name;
}
/*
* We report that this object has no children
*/
static gint
gail_item_get_n_children (AtkObject* obj)
{
return 0;
}
static AtkObject*
gail_item_ref_child (AtkObject *obj,
gint i)
{
return NULL;
}
static void
gail_item_notify_label_gtk (GObject *obj,
GParamSpec *pspec,
gpointer data)
{
AtkObject* atk_obj = ATK_OBJECT (data);
GtkLabel *label;
GailItem *gail_item;
if (strcmp (pspec->name, "label") == 0)
{
const gchar* label_text;
label = GTK_LABEL (obj);
label_text = gtk_label_get_text (label);
gail_item = GAIL_ITEM (atk_obj);
gail_text_util_text_setup (gail_item->textutil, label_text);
if (atk_obj->name == NULL)
{
/*
* The label has changed so notify a change in accessible-name
*/
g_object_notify (G_OBJECT (atk_obj), "accessible-name");
}
/*
* The label is the only property which can be changed
*/
g_signal_emit_by_name (atk_obj, "visible_data_changed");
}
}
/* atktext.h */
static void
atk_text_interface_init (AtkTextIface *iface)
{
iface->get_text = gail_item_get_text;
iface->get_character_at_offset = gail_item_get_character_at_offset;
iface->get_text_before_offset = gail_item_get_text_before_offset;
iface->get_text_at_offset = gail_item_get_text_at_offset;
iface->get_text_after_offset = gail_item_get_text_after_offset;
iface->get_character_count = gail_item_get_character_count;
iface->get_character_extents = gail_item_get_character_extents;
iface->get_offset_at_point = gail_item_get_offset_at_point;
iface->get_run_attributes = gail_item_get_run_attributes;
iface->get_default_attributes = gail_item_get_default_attributes;
}
static gchar*
gail_item_get_text (AtkText *text,
gint start_pos,
gint end_pos)
{
GtkWidget *widget;
GtkWidget *label;
GailItem *item;
const gchar *label_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL (label))
return NULL;
item = GAIL_ITEM (text);
if (!item->textutil)
gail_item_init_textutil (item, label);
label_text = gtk_label_get_text (GTK_LABEL (label));
if (label_text == NULL)
return NULL;
else
{
return gail_text_util_get_substring (item->textutil,
start_pos, end_pos);
}
}
static gchar*
gail_item_get_text_before_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GtkWidget *label;
GailItem *item;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
/* Get label */
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return NULL;
item = GAIL_ITEM (text);
if (!item->textutil)
gail_item_init_textutil (item, label);
return gail_text_util_get_text (item->textutil,
gtk_label_get_layout (GTK_LABEL (label)), GAIL_BEFORE_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
static gchar*
gail_item_get_text_at_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GtkWidget *label;
GailItem *item;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
/* Get label */
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return NULL;
item = GAIL_ITEM (text);
if (!item->textutil)
gail_item_init_textutil (item, label);
return gail_text_util_get_text (item->textutil,
gtk_label_get_layout (GTK_LABEL (label)), GAIL_AT_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
static gchar*
gail_item_get_text_after_offset (AtkText *text,
gint offset,
AtkTextBoundary boundary_type,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GtkWidget *label;
GailItem *item;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
{
/* State is defunct */
return NULL;
}
/* Get label */
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return NULL;
item = GAIL_ITEM (text);
if (!item->textutil)
gail_item_init_textutil (item, label);
return gail_text_util_get_text (item->textutil,
gtk_label_get_layout (GTK_LABEL (label)), GAIL_AFTER_OFFSET,
boundary_type, offset, start_offset, end_offset);
}
static gint
gail_item_get_character_count (AtkText *text)
{
GtkWidget *widget;
GtkWidget *label;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return 0;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return 0;
return g_utf8_strlen (gtk_label_get_text (GTK_LABEL (label)), -1);
}
static void
gail_item_get_character_extents (AtkText *text,
gint offset,
gint *x,
gint *y,
gint *width,
gint *height,
AtkCoordType coords)
{
GtkWidget *widget;
GtkWidget *label;
PangoRectangle char_rect;
gint index, x_layout, y_layout;
const gchar *label_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return;
gtk_label_get_layout_offsets (GTK_LABEL (label), &x_layout, &y_layout);
label_text = gtk_label_get_text (GTK_LABEL (label));
index = g_utf8_offset_to_pointer (label_text, offset) - label_text;
pango_layout_index_to_pos (gtk_label_get_layout (GTK_LABEL (label)), index, &char_rect);
gail_misc_get_extents_from_pango_rectangle (label, &char_rect,
x_layout, y_layout, x, y, width, height, coords);
}
static gint
gail_item_get_offset_at_point (AtkText *text,
gint x,
gint y,
AtkCoordType coords)
{
GtkWidget *widget;
GtkWidget *label;
gint index, x_layout, y_layout;
const gchar *label_text;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return -1;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return -1;
gtk_label_get_layout_offsets (GTK_LABEL (label), &x_layout, &y_layout);
index = gail_misc_get_index_at_point_in_layout (label,
gtk_label_get_layout (GTK_LABEL (label)),
x_layout, y_layout, x, y, coords);
label_text = gtk_label_get_text (GTK_LABEL (label));
if (index == -1)
{
if (coords == ATK_XY_WINDOW || coords == ATK_XY_SCREEN)
return g_utf8_strlen (label_text, -1);
return index;
}
else
return g_utf8_pointer_to_offset (label_text, label_text + index);
}
static AtkAttributeSet*
gail_item_get_run_attributes (AtkText *text,
gint offset,
gint *start_offset,
gint *end_offset)
{
GtkWidget *widget;
GtkWidget *label;
AtkAttributeSet *at_set = NULL;
GtkJustification justify;
GtkTextDirection dir;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return NULL;
/* Get values set for entire label, if any */
justify = gtk_label_get_justify (GTK_LABEL (label));
if (justify != GTK_JUSTIFY_CENTER)
{
at_set = gail_misc_add_attribute (at_set,
ATK_TEXT_ATTR_JUSTIFICATION,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_JUSTIFICATION, justify)));
}
dir = gtk_widget_get_direction (label);
if (dir == GTK_TEXT_DIR_RTL)
{
at_set = gail_misc_add_attribute (at_set,
ATK_TEXT_ATTR_DIRECTION,
g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION, dir)));
}
at_set = gail_misc_layout_get_run_attributes (at_set,
gtk_label_get_layout (GTK_LABEL (label)),
(gchar *) gtk_label_get_text (GTK_LABEL (label)),
offset,
start_offset,
end_offset);
return at_set;
}
static AtkAttributeSet*
gail_item_get_default_attributes (AtkText *text)
{
GtkWidget *widget;
GtkWidget *label;
AtkAttributeSet *at_set = NULL;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return NULL;
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return NULL;
at_set = gail_misc_get_default_attributes (at_set,
gtk_label_get_layout (GTK_LABEL (label)),
widget);
return at_set;
}
static gunichar
gail_item_get_character_at_offset (AtkText *text,
gint offset)
{
GtkWidget *widget;
GtkWidget *label;
const gchar *string;
gchar *index;
widget = GTK_ACCESSIBLE (text)->widget;
if (widget == NULL)
/* State is defunct */
return '\0';
label = get_label_from_container (widget);
if (!GTK_IS_LABEL(label))
return '\0';
string = gtk_label_get_text (GTK_LABEL (label));
if (offset >= g_utf8_strlen (string, -1))
return '\0';
index = g_utf8_offset_to_pointer (string, offset);
return g_utf8_get_char (index);
}
static GtkWidget*
get_label_from_container (GtkWidget *container)
{
GtkWidget *label;
GList *children, *tmp_list;
if (!GTK_IS_CONTAINER (container))
return NULL;
children = gtk_container_get_children (GTK_CONTAINER (container));
label = NULL;
for (tmp_list = children; tmp_list != NULL; tmp_list = tmp_list->next)
{
if (GTK_IS_LABEL (tmp_list->data))
{
label = tmp_list->data;
break;
}
/*
* Get label from menu item in desktop background preferences
* option menu. See bug #144084.
*/
else if (GTK_IS_BOX (tmp_list->data))
{
label = get_label_from_container (GTK_WIDGET (tmp_list->data));
if (label)
break;
}
}
g_list_free (children);
return label;
}