path: root/calendar/gui/a11y/ea-jump-button.c

/*
 *
 * This program 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) version 3.
 *
 * This program 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 the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Yang Wu <yang.wu@sun.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include "ea-jump-button.h"
#include "ea-calendar-helpers.h"
#include "ea-week-view.h"
#include "e-week-view.h"
#include <libgnomecanvas/gnome-canvas.h>
#include <glib/gi18n.h>

static void ea_jump_button_class_init (EaJumpButtonClass *klass);

static G_CONST_RETURN gchar * ea_jump_button_get_name (AtkObject *accessible);
static G_CONST_RETURN gchar * ea_jump_button_get_description (AtkObject *accessible);

/* action interface */
static void                  atk_action_interface_init  (AtkActionIface *iface);
static gboolean              jump_button_do_action      (AtkAction      *action,
                                                         gint           i);
static gint                  jump_button_get_n_actions  (AtkAction      *action);
static G_CONST_RETURN gchar * jump_button_get_keybinding (AtkAction      *action,
                                                         gint           i);

static gpointer parent_class = NULL;

GType
ea_jump_button_get_type (void)
{
    static GType type = 0;
    AtkObjectFactory *factory;
    GTypeQuery query;
    GType derived_atk_type;


    if (!type) {
        static GTypeInfo tinfo = {
            sizeof (EaJumpButtonClass),
            (GBaseInitFunc) NULL, /* base init */
            (GBaseFinalizeFunc) NULL, /* base finalize */
            (GClassInitFunc) ea_jump_button_class_init, /* class init */
            (GClassFinalizeFunc) NULL, /* class finalize */
            NULL, /* class data */
            sizeof (EaJumpButton), /* instance size */
            0, /* nb preallocs */
            (GInstanceInitFunc) NULL, /* instance init */
            NULL /* value table */
        };

        static const GInterfaceInfo atk_action_info =
            {
                (GInterfaceInitFunc) atk_action_interface_init,
                (GInterfaceFinalizeFunc) NULL,
                NULL
            };

        /*
         * Figure out the size of the class and instance
         * we are run-time deriving from (atk object for GNOME_TYPE_CANVAS_ITEM, in this case)
         */

        factory = atk_registry_get_factory (atk_get_default_registry (),
                            GNOME_TYPE_CANVAS_ITEM);
        derived_atk_type = atk_object_factory_get_accessible_type (factory);
        g_type_query (derived_atk_type, &query);

        tinfo.class_size = query.class_size;
        tinfo.instance_size = query.instance_size;

        /* we inherit the component and other interfaces from GNOME_TYPE_CANVAS_ITEM */
        type = g_type_register_static (derived_atk_type,
                           "EaJumpButton", &tinfo, 0);

        g_type_add_interface_static (type, ATK_TYPE_ACTION,
                         &atk_action_info);
    }

    return type;
}

static void
ea_jump_button_class_init (EaJumpButtonClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    class->get_name = ea_jump_button_get_name;
    class->get_description = ea_jump_button_get_description;
}

AtkObject*
ea_jump_button_new (GObject *obj)
{
    AtkObject *atk_obj = NULL;
    GObject *target_obj;

    g_return_val_if_fail (GNOME_IS_CANVAS_ITEM (obj), NULL);

    target_obj = obj;
    atk_obj = g_object_get_data (target_obj, "accessible-object");

    if (!atk_obj) {
        static AtkRole event_role = ATK_ROLE_INVALID;
        atk_obj = ATK_OBJECT (g_object_new (EA_TYPE_JUMP_BUTTON,
                            NULL));
        atk_object_initialize (atk_obj, target_obj);
        if (event_role == ATK_ROLE_INVALID)
            event_role = atk_role_register ("Jump Button");
        atk_obj->role = event_role;
    }

    /* the registered factory for GNOME_TYPE_CANVAS_ITEM is cannot create a EaJumpbutton,
     * we should save the EaJumpbutton object in it.
     */
    g_object_set_data (obj, "accessible-object", atk_obj);

    return atk_obj;
}

static G_CONST_RETURN gchar *
ea_jump_button_get_name (AtkObject *accessible)
{
    g_return_val_if_fail (EA_IS_JUMP_BUTTON (accessible), NULL);

    if (accessible->name)
        return accessible->name;
    return _("Jump button");
}

static G_CONST_RETURN gchar *
ea_jump_button_get_description (AtkObject *accessible)
{
    if (accessible->description)
        return accessible->description;

    return _("Click here, you can find more events.");
}

static void
atk_action_interface_init (AtkActionIface *iface)
{
  g_return_if_fail (iface != NULL);

  iface->do_action = jump_button_do_action;
  iface->get_n_actions = jump_button_get_n_actions;
  iface->get_keybinding = jump_button_get_keybinding;
}

static gboolean
jump_button_do_action (AtkAction *action,
                       gint      i)
{
  gboolean return_value = TRUE;
  AtkGObjectAccessible *atk_gobj;
  GObject *g_obj;
  GnomeCanvasItem *item;
  ECalendarView *cal_view;
  EWeekView *week_view;

  atk_gobj = ATK_GOBJECT_ACCESSIBLE (action);
  g_obj = atk_gobject_accessible_get_object (atk_gobj);
  if (!g_obj)
      return FALSE;

  item = GNOME_CANVAS_ITEM (g_obj);
  cal_view = ea_calendar_helpers_get_cal_view_from (GNOME_CANVAS_ITEM (item));
  week_view = E_WEEK_VIEW (cal_view);

  switch (i)
    {
    case 0:
        e_week_view_jump_to_button_item (week_view, GNOME_CANVAS_ITEM (item));
        break;
    default:
        return_value = FALSE;
      break;
    }
  return return_value;
}

static gint
jump_button_get_n_actions (AtkAction *action)
{
  return 1;
}

static G_CONST_RETURN gchar *
jump_button_get_keybinding (AtkAction *action,
                            gint      i)
{
  const gchar *return_value = NULL;

  switch (i)
    {
    case 0:
      {
          return_value = "space or enter";
          break;
      }
    default:
      break;
    }
  return return_value;
}