forked from AuroraMiddleware/gtk
515 lines
15 KiB
C
515 lines
15 KiB
C
/* GAIL - The GNOME Accessibility Implementation Library
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* Copyright 2004 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 <config.h>
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#include <string.h>
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#include <gtk/gtk.h>
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#include "gailscale.h"
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#include <libgail-util/gailmisc.h>
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static void gail_scale_class_init (GailScaleClass *klass);
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static void gail_scale_init (GailScale *scale);
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static void gail_scale_real_initialize (AtkObject *obj,
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gpointer data);
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static void gail_scale_notify (GObject *obj,
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GParamSpec *pspec);
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static void gail_scale_finalize (GObject *object);
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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_scale_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_scale_get_character_at_offset
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(AtkText *text,
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gint offset);
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static gchar* gail_scale_get_text_before_offset
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(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_scale_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_scale_get_text_after_offset
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(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_scale_get_character_count (AtkText *text);
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static void gail_scale_get_character_extents
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(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_scale_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_scale_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_scale_get_default_attributes
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(AtkText *text);
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G_DEFINE_TYPE_WITH_CODE (GailScale, gail_scale, GAIL_TYPE_RANGE,
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G_IMPLEMENT_INTERFACE (ATK_TYPE_TEXT, atk_text_interface_init))
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static void
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gail_scale_class_init (GailScaleClass *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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class->initialize = gail_scale_real_initialize;
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gobject_class->finalize = gail_scale_finalize;
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gobject_class->notify = gail_scale_notify;
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}
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AtkObject*
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gail_scale_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_RANGE (widget), NULL);
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object = g_object_new (GAIL_TYPE_SCALE, 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_scale_init (GailScale *scale)
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{
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}
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static void
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gail_scale_real_initialize (AtkObject *obj,
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gpointer data)
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{
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GailScale *gail_scale;
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const gchar *txt;
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PangoLayout *layout;
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ATK_OBJECT_CLASS (gail_scale_parent_class)->initialize (obj, data);
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gail_scale = GAIL_SCALE (obj);
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gail_scale->textutil = gail_text_util_new ();
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layout = gtk_scale_get_layout (GTK_SCALE (data));
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if (layout)
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{
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txt = pango_layout_get_text (layout);
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if (txt)
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{
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gail_text_util_text_setup (gail_scale->textutil, txt);
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}
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}
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}
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static void
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gail_scale_finalize (GObject *object)
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{
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GailScale *scale = GAIL_SCALE (object);
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g_object_unref (scale->textutil);
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G_OBJECT_CLASS (gail_scale_parent_class)->finalize (object);
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}
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static void
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gail_scale_notify (GObject *obj,
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GParamSpec *pspec)
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{
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GailScale *scale = GAIL_SCALE (obj);
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if (strcmp (pspec->name, "accessible-value") == 0)
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{
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GtkWidget *widget;
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widget = GTK_ACCESSIBLE (obj)->widget;
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if (widget)
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{
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GtkScale *gtk_scale;
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PangoLayout *layout;
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const gchar *txt;
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gtk_scale = GTK_SCALE (widget);
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layout = gtk_scale_get_layout (gtk_scale);
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if (layout)
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{
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txt = pango_layout_get_text (layout);
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if (txt)
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{
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g_signal_emit_by_name (obj, "text_changed::delete", 0,
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gtk_text_buffer_get_char_count (scale->textutil->buffer));
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gail_text_util_text_setup (scale->textutil, txt);
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g_signal_emit_by_name (obj, "text_changed::insert", 0,
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g_utf8_strlen (txt, -1));
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}
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}
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}
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}
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G_OBJECT_CLASS (gail_scale_parent_class)->notify (obj, pspec);
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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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iface->get_text = gail_scale_get_text;
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iface->get_character_at_offset = gail_scale_get_character_at_offset;
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iface->get_text_before_offset = gail_scale_get_text_before_offset;
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iface->get_text_at_offset = gail_scale_get_text_at_offset;
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iface->get_text_after_offset = gail_scale_get_text_after_offset;
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iface->get_character_count = gail_scale_get_character_count;
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iface->get_character_extents = gail_scale_get_character_extents;
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iface->get_offset_at_point = gail_scale_get_offset_at_point;
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iface->get_run_attributes = gail_scale_get_run_attributes;
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iface->get_default_attributes = gail_scale_get_default_attributes;
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}
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static gchar*
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gail_scale_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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GailScale *scale;
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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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scale = GAIL_SCALE (text);
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return gail_text_util_get_substring (scale->textutil,
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start_pos, end_pos);
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}
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static gchar*
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gail_scale_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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GailScale *scale;
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PangoLayout *layout;
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gchar *txt;
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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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scale = GAIL_SCALE (text);
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layout = gtk_scale_get_layout (GTK_SCALE (widget));
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if (layout)
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{
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txt = gail_text_util_get_text (scale->textutil,
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layout, GAIL_BEFORE_OFFSET,
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boundary_type, offset, start_offset, end_offset);
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}
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else
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txt = NULL;
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return txt;
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}
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static gchar*
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gail_scale_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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GailScale *scale;
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PangoLayout *layout;
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gchar *txt;
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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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scale = GAIL_SCALE (text);
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layout = gtk_scale_get_layout (GTK_SCALE (widget));
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if (layout)
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{
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txt = gail_text_util_get_text (scale->textutil,
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layout, GAIL_AT_OFFSET,
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boundary_type, offset, start_offset, end_offset);
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}
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else
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txt = NULL;
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return txt;
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}
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static gchar*
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gail_scale_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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GailScale *scale;
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PangoLayout *layout;
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gchar *txt;
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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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scale = GAIL_SCALE (text);
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layout = gtk_scale_get_layout (GTK_SCALE (widget));
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if (layout)
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{
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txt = gail_text_util_get_text (scale->textutil,
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layout, GAIL_AFTER_OFFSET,
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boundary_type, offset, start_offset, end_offset);
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}
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else
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txt = NULL;
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return txt;
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}
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static gint
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gail_scale_get_character_count (AtkText *text)
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{
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GtkWidget *widget;
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GailScale *scale;
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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 0;
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scale = GAIL_SCALE (text);
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if (scale->textutil->buffer)
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return gtk_text_buffer_get_char_count (scale->textutil->buffer);
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else
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return 0;
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}
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static void
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gail_scale_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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{
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GtkWidget *widget;
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GtkScale *scale;
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PangoRectangle char_rect;
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PangoLayout *layout;
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gint index, x_layout, y_layout;
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const gchar *scale_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;
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scale = GTK_SCALE (widget);
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layout = gtk_scale_get_layout (scale);
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if (!layout)
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return;
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scale_text = pango_layout_get_text (layout);
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if (!scale_text)
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return;
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index = g_utf8_offset_to_pointer (scale_text, offset) - scale_text;
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gtk_scale_get_layout_offsets (scale, &x_layout, &y_layout);
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pango_layout_index_to_pos (layout, index, &char_rect);
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gail_misc_get_extents_from_pango_rectangle (widget, &char_rect,
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x_layout, y_layout, x, y, width, height, coords);
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}
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static gint
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gail_scale_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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{
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GtkWidget *widget;
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GtkScale *scale;
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PangoLayout *layout;
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gint index, x_layout, y_layout;
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const gchar *scale_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 -1;
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scale = GTK_SCALE (widget);
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layout = gtk_scale_get_layout (scale);
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if (!layout)
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return -1;
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scale_text = pango_layout_get_text (layout);
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if (!scale_text)
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return -1;
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gtk_scale_get_layout_offsets (scale, &x_layout, &y_layout);
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index = gail_misc_get_index_at_point_in_layout (widget,
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layout,
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x_layout, y_layout, x, y, coords);
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if (index == -1)
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{
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if (coords == ATK_XY_WINDOW || coords == ATK_XY_SCREEN)
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index = g_utf8_strlen (scale_text, -1);
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}
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else
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index = g_utf8_pointer_to_offset (scale_text, scale_text + index);
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return index;
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}
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static AtkAttributeSet*
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gail_scale_get_run_attributes (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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{
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GtkWidget *widget;
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GtkScale *scale;
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AtkAttributeSet *at_set = NULL;
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GtkTextDirection dir;
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PangoLayout *layout;
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const gchar *scale_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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scale = GTK_SCALE (widget);
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layout = gtk_scale_get_layout (scale);
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if (!layout)
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return at_set;
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scale_text = pango_layout_get_text (layout);
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if (!scale_text)
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return at_set;
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dir = gtk_widget_get_direction (widget);
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if (dir == GTK_TEXT_DIR_RTL)
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{
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at_set = gail_misc_add_attribute (at_set,
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ATK_TEXT_ATTR_DIRECTION,
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g_strdup (atk_text_attribute_get_value (ATK_TEXT_ATTR_DIRECTION, dir)));
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}
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at_set = gail_misc_layout_get_run_attributes (at_set,
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layout,
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(gchar *)scale_text,
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offset,
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start_offset,
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end_offset);
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return at_set;
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}
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static AtkAttributeSet*
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gail_scale_get_default_attributes (AtkText *text)
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{
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GtkWidget *widget;
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AtkAttributeSet *at_set = NULL;
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PangoLayout *layout;
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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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layout = gtk_scale_get_layout (GTK_SCALE (widget));
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if (layout)
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{
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at_set = gail_misc_get_default_attributes (at_set,
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layout,
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widget);
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}
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return at_set;
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}
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static gunichar
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gail_scale_get_character_at_offset (AtkText *text,
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gint offset)
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{
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GtkWidget *widget;
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GtkScale *scale;
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PangoLayout *layout;
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const gchar *string;
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gchar *index;
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gunichar c;
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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 '\0';
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scale = GTK_SCALE (widget);
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layout = gtk_scale_get_layout (scale);
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if (!layout)
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return '\0';
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string = pango_layout_get_text (layout);
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if (offset >= g_utf8_strlen (string, -1))
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c = '\0';
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else
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{
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index = g_utf8_offset_to_pointer (string, offset);
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c = g_utf8_get_char (index);
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}
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return c;
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}
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