/* 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>
#include <gtk/gtk.h>
#include "gtkspinbuttonaccessible.h"
#include "gailadjustment.h"


static void atk_value_interface_init (AtkValueIface *iface);

G_DEFINE_TYPE_WITH_CODE (GtkSpinButtonAccessible, gtk_spin_button_accessible, GTK_TYPE_ENTRY_ACCESSIBLE,
                         G_IMPLEMENT_INTERFACE (ATK_TYPE_VALUE, atk_value_interface_init))

static void
gtk_spin_button_accessible_value_changed (GtkAdjustment *adjustment,
                                          gpointer       data)
{
  GtkSpinButtonAccessible *spin_button;

  if (adjustment == NULL || data == NULL)
    return;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (data);

  g_object_notify (G_OBJECT (spin_button), "accessible-value");
}

static void
gtk_spin_button_accessible_initialize (AtkObject *obj,
                                       gpointer  data)
{
  GtkAdjustment *adjustment;
  GtkSpinButtonAccessible *spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  GtkSpinButton *gtk_spin_button;

  ATK_OBJECT_CLASS (gtk_spin_button_accessible_parent_class)->initialize (obj, data);

  gtk_spin_button = GTK_SPIN_BUTTON (data);
  /*
   * If a GtkAdjustment already exists for the spin_button,
   * create the GailAdjustment
   */
  adjustment = gtk_spin_button_get_adjustment (gtk_spin_button);
  if (adjustment)
    {
      spin_button->adjustment = gail_adjustment_new (adjustment);
      g_signal_connect (adjustment,
                        "value-changed",
                        G_CALLBACK (gtk_spin_button_accessible_value_changed),
                        obj);
    }
  else
    spin_button->adjustment = NULL;

  obj->role = ATK_ROLE_SPIN_BUTTON;

}

static void
gtk_spin_button_accessible_finalize (GObject *object)
{
  GtkSpinButtonAccessible *spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (object);

  if (spin_button->adjustment)
    g_object_unref (spin_button->adjustment);

  G_OBJECT_CLASS (gtk_spin_button_accessible_parent_class)->finalize (object);
}

static void
gtk_spin_button_accessible_notify_gtk (GObject    *obj,
                                       GParamSpec *pspec)
{
  GtkWidget *widget = GTK_WIDGET (obj);
  GtkSpinButtonAccessible *spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (gtk_widget_get_accessible (widget));

  if (strcmp (pspec->name, "adjustment") == 0)
    {
      /*
       * Get rid of the GailAdjustment for the GtkAdjustment
       * which was associated with the spin_button.
       */
      GtkAdjustment* adjustment;
      GtkSpinButton* gtk_spin_button;

      if (spin_button->adjustment)
        {
          g_object_unref (spin_button->adjustment);
          spin_button->adjustment = NULL;
        }
      /*
       * Create the GailAdjustment when notify for "adjustment" property
       * is received
       */
      gtk_spin_button = GTK_SPIN_BUTTON (widget);
      adjustment = gtk_spin_button_get_adjustment (gtk_spin_button);
      spin_button->adjustment = gail_adjustment_new (adjustment);
      g_signal_connect (adjustment,
                        "value-changed",
                        G_CALLBACK (gtk_spin_button_accessible_value_changed),
                        spin_button);
    }
  else
    GAIL_WIDGET_CLASS (gtk_spin_button_accessible_parent_class)->notify_gtk (obj, pspec);
}



static void
gtk_spin_button_accessible_class_init (GtkSpinButtonAccessibleClass *klass)
{
  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
  AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
  GailWidgetClass *widget_class;

  widget_class = (GailWidgetClass*)klass;

  widget_class->notify_gtk = gtk_spin_button_accessible_notify_gtk;

  class->initialize = gtk_spin_button_accessible_initialize;

  gobject_class->finalize = gtk_spin_button_accessible_finalize;
}

static void
gtk_spin_button_accessible_init (GtkSpinButtonAccessible *button)
{
}

static void
gtk_spin_button_accessible_get_current_value (AtkValue *obj,
                                              GValue   *value)
{
  GtkSpinButtonAccessible *spin_button;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  if (spin_button->adjustment == NULL)
    return;

  atk_value_get_current_value (ATK_VALUE (spin_button->adjustment), value);
}

static void
gtk_spin_button_accessible_get_maximum_value (AtkValue *obj,
                                              GValue   *value)
{
  GtkSpinButtonAccessible *spin_button;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  if (spin_button->adjustment == NULL)
    return;

  atk_value_get_maximum_value (ATK_VALUE (spin_button->adjustment), value);
}

static void
gtk_spin_button_accessible_get_minimum_value (AtkValue *obj,
                                              GValue   *value)
{
 GtkSpinButtonAccessible *spin_button;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  if (spin_button->adjustment == NULL)
    return;

  atk_value_get_minimum_value (ATK_VALUE (spin_button->adjustment), value);
}

static void
gtk_spin_button_accessible_get_minimum_increment (AtkValue *obj,
                                                  GValue   *value)
{
  GtkSpinButtonAccessible *spin_button;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  if (spin_button->adjustment == NULL)
    return;

  atk_value_get_minimum_increment (ATK_VALUE (spin_button->adjustment), value);
}

static gboolean
gtk_spin_button_accessible_set_current_value (AtkValue     *obj,
                                              const GValue *value)
{
 GtkSpinButtonAccessible *spin_button;

  spin_button = GTK_SPIN_BUTTON_ACCESSIBLE (obj);
  if (spin_button->adjustment == NULL)
    return FALSE;

  return atk_value_set_current_value (ATK_VALUE (spin_button->adjustment), value);
}

static void
atk_value_interface_init (AtkValueIface *iface)
{
  iface->get_current_value = gtk_spin_button_accessible_get_current_value;
  iface->get_maximum_value = gtk_spin_button_accessible_get_maximum_value;
  iface->get_minimum_value = gtk_spin_button_accessible_get_minimum_value;
  iface->get_minimum_increment = gtk_spin_button_accessible_get_minimum_increment;
  iface->set_current_value = gtk_spin_button_accessible_set_current_value;
}