forked from AuroraMiddleware/gtk
a8e6ee33b1
* configure.in: * docs/reference/Makefile.am: * docs/reference/libgail-util/*: * gail-uninstalled.pc.in: * gail.pc.in: * modules/Makefile.am: * modules/other/Makefile.am: * modules/other/gail/*: * modules/other/gail/libgail-util/*: * po/POTFILES.skip: Integrate gail into gtk+. Bug #169488. svn path=/trunk/; revision=19196
761 lines
22 KiB
C
761 lines
22 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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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, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gailitem.h"
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#include <libgail-util/gailmisc.h>
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static void gail_item_class_init (GailItemClass *klass);
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static G_CONST_RETURN gchar* gail_item_get_name (AtkObject *obj);
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static gint gail_item_get_n_children (AtkObject *obj);
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static AtkObject* gail_item_ref_child (AtkObject *obj,
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gint i);
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static void gail_item_real_initialize (AtkObject *obj,
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gpointer data);
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static void gail_item_label_map_gtk (GtkWidget *widget,
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gpointer data);
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static void gail_item_finalize (GObject *object);
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static void gail_item_init_textutil (GailItem *item,
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GtkWidget *label);
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static void gail_item_notify_label_gtk(GObject *obj,
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GParamSpec *pspec,
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gpointer data);
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/* atktext.h */
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static void atk_text_interface_init (AtkTextIface *iface);
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static gchar* gail_item_get_text (AtkText *text,
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gint start_pos,
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gint end_pos);
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static gunichar gail_item_get_character_at_offset(AtkText *text,
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gint offset);
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static gchar* gail_item_get_text_before_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset);
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static gchar* gail_item_get_text_at_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset);
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static gchar* gail_item_get_text_after_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset);
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static gint gail_item_get_character_count (AtkText *text);
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static void gail_item_get_character_extents (AtkText *text,
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gint offset,
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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 coords);
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static gint gail_item_get_offset_at_point (AtkText *text,
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gint x,
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gint y,
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AtkCoordType coords);
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static AtkAttributeSet* gail_item_get_run_attributes
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(AtkText *text,
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gint offset,
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gint *start_offset,
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gint *end_offset);
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static AtkAttributeSet* gail_item_get_default_attributes
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(AtkText *text);
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static GtkWidget* get_label_from_container (GtkWidget *container);
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static GailContainerClass* parent_class = NULL;
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GType
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gail_item_get_type (void)
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{
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static GType type = 0;
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if (!type)
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{
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static const GTypeInfo tinfo =
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{
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sizeof (GailItemClass),
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(GBaseInitFunc) NULL, /* base init */
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(GBaseFinalizeFunc) NULL, /* base finalize */
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(GClassInitFunc) gail_item_class_init, /* class init */
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(GClassFinalizeFunc) NULL, /* class finalize */
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NULL, /* class data */
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sizeof (GailItem), /* instance size */
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0, /* nb preallocs */
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(GInstanceInitFunc) NULL, /* instance init */
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NULL /* value table */
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};
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static const GInterfaceInfo atk_text_info =
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{
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(GInterfaceInitFunc) atk_text_interface_init,
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(GInterfaceFinalizeFunc) NULL,
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NULL
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};
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type = g_type_register_static (GAIL_TYPE_CONTAINER,
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"GailItem", &tinfo, 0);
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g_type_add_interface_static (type, ATK_TYPE_TEXT,
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&atk_text_info);
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}
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return type;
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}
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static void
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gail_item_class_init (GailItemClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
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GailContainerClass *container_class;
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parent_class = g_type_class_peek_parent (klass);
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container_class = (GailContainerClass *)klass;
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gobject_class->finalize = gail_item_finalize;
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class->get_name = gail_item_get_name;
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class->get_n_children = gail_item_get_n_children;
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class->ref_child = gail_item_ref_child;
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class->initialize = gail_item_real_initialize;
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/*
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* As we report the item as having no children we are not interested
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* in add and remove signals
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*/
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container_class->add_gtk = NULL;
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container_class->remove_gtk = NULL;
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}
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AtkObject*
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gail_item_new (GtkWidget *widget)
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{
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GObject *object;
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AtkObject *accessible;
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g_return_val_if_fail (GTK_IS_ITEM (widget), NULL);
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object = g_object_new (GAIL_TYPE_ITEM, NULL);
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accessible = ATK_OBJECT (object);
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atk_object_initialize (accessible, widget);
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return accessible;
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}
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static void
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gail_item_real_initialize (AtkObject *obj,
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gpointer data)
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{
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GailItem *item = GAIL_ITEM (obj);
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GtkWidget *label;
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ATK_OBJECT_CLASS (parent_class)->initialize (obj, data);
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item->textutil = NULL;
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item->text = NULL;
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label = get_label_from_container (GTK_WIDGET (data));
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if (GTK_IS_LABEL (label))
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{
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if (GTK_WIDGET_MAPPED (label))
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gail_item_init_textutil (item, label);
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else
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g_signal_connect (label,
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"map",
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G_CALLBACK (gail_item_label_map_gtk),
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item);
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}
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obj->role = ATK_ROLE_LIST_ITEM;
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}
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static void
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gail_item_label_map_gtk (GtkWidget *widget,
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gpointer data)
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{
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GailItem *item;
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item = GAIL_ITEM (data);
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gail_item_init_textutil (item, widget);
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}
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static void
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gail_item_init_textutil (GailItem *item,
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GtkWidget *label)
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{
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const gchar *label_text;
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if (item->textutil == NULL)
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{
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item->textutil = gail_text_util_new ();
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g_signal_connect (label,
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"notify",
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(GCallback) gail_item_notify_label_gtk,
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item);
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}
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label_text = gtk_label_get_text (GTK_LABEL (label));
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gail_text_util_text_setup (item->textutil, label_text);
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}
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static void
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gail_item_finalize (GObject *object)
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{
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GailItem *item = GAIL_ITEM (object);
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if (item->textutil)
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{
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g_object_unref (item->textutil);
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}
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if (item->text)
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{
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g_free (item->text);
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item->text = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static G_CONST_RETURN gchar*
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gail_item_get_name (AtkObject *obj)
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{
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G_CONST_RETURN gchar* name;
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g_return_val_if_fail (GAIL_IS_ITEM (obj), NULL);
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name = ATK_OBJECT_CLASS (parent_class)->get_name (obj);
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if (name == NULL)
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{
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/*
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* Get the label child
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*/
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GtkWidget *widget;
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GtkWidget *label;
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget == NULL)
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/*
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* State is defunct
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*/
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return NULL;
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label = get_label_from_container (widget);
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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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/*
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* If we have a menu item in a menu attached to a GtkOptionMenu
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* the label of the selected item is detached from the menu item
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*/
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else if (GTK_IS_MENU_ITEM (widget))
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{
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GtkWidget *parent;
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GtkWidget *attach;
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GList *list;
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AtkObject *parent_obj;
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gint index;
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parent = gtk_widget_get_parent (widget);
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if (GTK_IS_MENU (parent))
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{
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attach = gtk_menu_get_attach_widget (GTK_MENU (parent));
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if (GTK_IS_OPTION_MENU (attach))
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{
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label = get_label_from_container (attach);
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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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}
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list = gtk_container_get_children (GTK_CONTAINER (parent));
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index = g_list_index (list, widget);
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if (index < 0 || index > g_list_length (list))
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{
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g_list_free (list);
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return NULL;
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}
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g_list_free (list);
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parent_obj = atk_object_get_parent (gtk_widget_get_accessible (parent));
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if (GTK_IS_ACCESSIBLE (parent_obj))
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{
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parent = GTK_ACCESSIBLE (parent_obj)->widget;
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if (GTK_IS_COMBO_BOX (parent))
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{
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GtkTreeModel *model;
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GtkTreeIter iter;
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GailItem *item;
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gint n_columns, i;
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model = gtk_combo_box_get_model (GTK_COMBO_BOX (parent));
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item = GAIL_ITEM (obj);
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if (gtk_tree_model_iter_nth_child (model, &iter, NULL, index))
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{
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n_columns = gtk_tree_model_get_n_columns (model);
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for (i = 0; i < n_columns; i++)
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{
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GValue value = { 0, };
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gtk_tree_model_get_value (model, &iter, i, &value);
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if (G_VALUE_HOLDS_STRING (&value))
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{
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g_free (item->text);
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item->text = (gchar *) g_value_dup_string (&value);
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g_value_unset (&value);
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break;
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}
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}
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}
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name = item->text;
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}
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}
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}
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}
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}
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return name;
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}
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/*
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* We report that this object has no children
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*/
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static gint
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gail_item_get_n_children (AtkObject* obj)
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{
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return 0;
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}
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static AtkObject*
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gail_item_ref_child (AtkObject *obj,
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gint i)
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{
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return NULL;
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}
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static void
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gail_item_notify_label_gtk (GObject *obj,
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GParamSpec *pspec,
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gpointer data)
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{
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AtkObject* atk_obj = ATK_OBJECT (data);
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GtkLabel *label;
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GailItem *gail_item;
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if (strcmp (pspec->name, "label") == 0)
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{
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const gchar* label_text;
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label = GTK_LABEL (obj);
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label_text = gtk_label_get_text (label);
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gail_item = GAIL_ITEM (atk_obj);
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gail_text_util_text_setup (gail_item->textutil, label_text);
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if (atk_obj->name == NULL)
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{
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/*
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* The label has changed so notify a change in accessible-name
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*/
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g_object_notify (G_OBJECT (atk_obj), "accessible-name");
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}
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/*
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* The label is the only property which can be changed
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*/
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g_signal_emit_by_name (atk_obj, "visible_data_changed");
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}
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}
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/* atktext.h */
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static void
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atk_text_interface_init (AtkTextIface *iface)
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{
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g_return_if_fail (iface != NULL);
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iface->get_text = gail_item_get_text;
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iface->get_character_at_offset = gail_item_get_character_at_offset;
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iface->get_text_before_offset = gail_item_get_text_before_offset;
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iface->get_text_at_offset = gail_item_get_text_at_offset;
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iface->get_text_after_offset = gail_item_get_text_after_offset;
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iface->get_character_count = gail_item_get_character_count;
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iface->get_character_extents = gail_item_get_character_extents;
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iface->get_offset_at_point = gail_item_get_offset_at_point;
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iface->get_run_attributes = gail_item_get_run_attributes;
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iface->get_default_attributes = gail_item_get_default_attributes;
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}
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static gchar*
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gail_item_get_text (AtkText *text,
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gint start_pos,
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gint end_pos)
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{
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GtkWidget *widget;
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GtkWidget *label;
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GailItem *item;
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const gchar *label_text;
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widget = GTK_ACCESSIBLE (text)->widget;
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if (widget == NULL)
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/* State is defunct */
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return NULL;
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label = get_label_from_container (widget);
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if (!GTK_IS_LABEL (label))
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return NULL;
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item = GAIL_ITEM (text);
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if (!item->textutil)
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gail_item_init_textutil (item, label);
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label_text = gtk_label_get_text (GTK_LABEL (label));
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if (label_text == NULL)
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return NULL;
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else
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{
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return gail_text_util_get_substring (item->textutil,
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start_pos, end_pos);
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}
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}
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static gchar*
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gail_item_get_text_before_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset)
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{
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GtkWidget *widget;
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GtkWidget *label;
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GailItem *item;
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widget = GTK_ACCESSIBLE (text)->widget;
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if (widget == NULL)
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/* State is defunct */
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return NULL;
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/* Get label */
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label = get_label_from_container (widget);
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if (!GTK_IS_LABEL(label))
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return NULL;
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item = GAIL_ITEM (text);
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if (!item->textutil)
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gail_item_init_textutil (item, label);
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return gail_text_util_get_text (item->textutil,
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gtk_label_get_layout (GTK_LABEL (label)), GAIL_BEFORE_OFFSET,
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boundary_type, offset, start_offset, end_offset);
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}
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static gchar*
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gail_item_get_text_at_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset)
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{
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GtkWidget *widget;
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GtkWidget *label;
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GailItem *item;
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widget = GTK_ACCESSIBLE (text)->widget;
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if (widget == NULL)
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/* State is defunct */
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return NULL;
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/* Get label */
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label = get_label_from_container (widget);
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if (!GTK_IS_LABEL(label))
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return NULL;
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item = GAIL_ITEM (text);
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if (!item->textutil)
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gail_item_init_textutil (item, label);
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return gail_text_util_get_text (item->textutil,
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gtk_label_get_layout (GTK_LABEL (label)), GAIL_AT_OFFSET,
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boundary_type, offset, start_offset, end_offset);
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}
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static gchar*
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gail_item_get_text_after_offset (AtkText *text,
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gint offset,
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AtkTextBoundary boundary_type,
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gint *start_offset,
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gint *end_offset)
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{
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GtkWidget *widget;
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GtkWidget *label;
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GailItem *item;
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widget = GTK_ACCESSIBLE (text)->widget;
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if (widget == NULL)
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{
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/* State is defunct */
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return NULL;
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}
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/* Get label */
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label = get_label_from_container (widget);
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if (!GTK_IS_LABEL(label))
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return NULL;
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item = GAIL_ITEM (text);
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if (!item->textutil)
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gail_item_init_textutil (item, label);
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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;
|
|
}
|