path: root/a11y/calendar/ea-cal-view.c

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* vim:expandtab:shiftwidth=8:tabstop=8:
 */
/* Evolution Accessibility: ea-cal-view.c
 *
 * Copyright (C) 2003 Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Bolian Yin <bolian.yin@sun.com> Sun Microsystem Inc., 2003
 *
 */

#include "ea-cal-view.h"
#include "ea-calendar-helpers.h"
#include "e-day-view.h"
#include "e-week-view.h"
#include "calendar-commands.h"
#include <glib/gstrfuncs.h>

static void ea_cal_view_class_init (EaCalViewClass *klass);

static AtkObject* ea_cal_view_get_parent (AtkObject *accessible);
static gint ea_cal_view_get_index_in_parent (AtkObject *accessible);
static void ea_cal_view_real_initialize (AtkObject *accessible, gpointer data);

static void ea_cal_view_event_changed_cb (ECalView *cal_view,
                                          ECalViewEvent *event, gpointer data);
static void ea_cal_view_event_added_cb (ECalView *cal_view,
                                        ECalViewEvent *event, gpointer data);

static void ea_cal_view_dates_change_cb (GnomeCalendar *gcal, gpointer data);

static gpointer parent_class = NULL;

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

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

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

        factory = atk_registry_get_factory (atk_get_default_registry (),
                            GTK_TYPE_WIDGET);
        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;

        type = g_type_register_static (derived_atk_type,
                           "EaCalView", &tinfo, 0);
    }

    return type;
}

static void
ea_cal_view_class_init (EaCalViewClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    class->get_parent = ea_cal_view_get_parent;
    class->get_index_in_parent = ea_cal_view_get_index_in_parent;
    class->initialize = ea_cal_view_real_initialize;
}

AtkObject* 
ea_cal_view_new (GtkWidget *widget)
{
    GObject *object;
    AtkObject *accessible;

    g_return_val_if_fail (E_IS_CAL_VIEW (widget), NULL);

    object = g_object_new (EA_TYPE_CAL_VIEW, NULL);

    accessible = ATK_OBJECT (object);
    atk_object_initialize (accessible, widget);

    return accessible;
}

static void
ea_cal_view_real_initialize (AtkObject *accessible, gpointer data)
{
    ECalView *cal_view;
    GnomeCalendar *gcal;

    g_return_if_fail (EA_IS_CAL_VIEW (accessible));
    g_return_if_fail (E_IS_CAL_VIEW (data));

        ATK_OBJECT_CLASS (parent_class)->initialize (accessible, data);
    accessible->role = ATK_ROLE_CANVAS;
    cal_view = E_CAL_VIEW (data);

    /* add listener for event_changed, event_added
     * we don't need to listen on event_removed. When the e_text
     * of the event is removed, the cal_view_event will go to the state
     * of "defunct" (changed by weak ref callback of atkgobjectaccessible
     */
    g_signal_connect (G_OBJECT(cal_view), "event_changed",
              G_CALLBACK (ea_cal_view_event_changed_cb), NULL);
    g_signal_connect (G_OBJECT(cal_view), "event_added",
              G_CALLBACK (ea_cal_view_event_added_cb), NULL);

    /* listen for date changes of calendar */
    gcal = e_cal_view_get_calendar (cal_view);

    if (gcal)
        g_signal_connect (gcal, "dates_shown_changed",
                  G_CALLBACK (ea_cal_view_dates_change_cb),
                  accessible);
}

static AtkObject* 
ea_cal_view_get_parent (AtkObject *accessible)
{
    ECalView *cal_view;
    GnomeCalendar *gnomeCalendar;

    g_return_val_if_fail (EA_IS_CAL_VIEW (accessible), NULL);

    if (!GTK_ACCESSIBLE (accessible)->widget)
        return NULL;
    cal_view = E_CAL_VIEW (GTK_ACCESSIBLE (accessible)->widget);

    gnomeCalendar = e_cal_view_get_calendar (cal_view);

    return gtk_widget_get_accessible (GTK_WIDGET(gnomeCalendar));
}

static gint
ea_cal_view_get_index_in_parent (AtkObject *accessible)
{
    return 1;
}

static void
ea_cal_view_event_changed_cb (ECalView *cal_view, ECalViewEvent *event,
                              gpointer data)
{
    AtkObject *atk_obj;
    EaCalView *ea_cal_view;
    AtkObject *event_atk_obj = NULL;

    g_return_if_fail (E_IS_CAL_VIEW (cal_view));

    atk_obj = gtk_widget_get_accessible (GTK_WIDGET(cal_view));
    if (!EA_IS_CAL_VIEW (atk_obj))
        return;
    ea_cal_view = EA_CAL_VIEW (atk_obj);

    if ((E_IS_DAY_VIEW (cal_view)) && event && event->canvas_item) {
        event_atk_obj =
            ea_calendar_helpers_get_accessible_for (event->canvas_item);
    }
    else if ((E_IS_WEEK_VIEW (cal_view)) && event) {
        EWeekViewEventSpan *span;
        EWeekViewEvent *week_view_event = (EWeekViewEvent *)event;
        EWeekView *week_view = E_WEEK_VIEW (cal_view);
        /* get the first span of the event */
        span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                       week_view_event->spans_index);
        if (span && span->text_item)
            event_atk_obj = ea_calendar_helpers_get_accessible_for (span->text_item);
    }
    if (event_atk_obj) {
#ifdef ACC_DEBUG
        printf ("AccDebug: event=%p changed\n", event);
#endif
        g_object_notify (G_OBJECT(event_atk_obj), "accessible-name");
        g_signal_emit_by_name (event_atk_obj, "visible_data_changed");
    }

}

static void
ea_cal_view_event_added_cb (ECalView *cal_view, ECalViewEvent *event,
                            gpointer data)
{
    AtkObject *atk_obj;
    EaCalView *ea_cal_view;
    AtkObject *event_atk_obj = NULL;
    gint index;

    g_return_if_fail (E_IS_CAL_VIEW (cal_view));

    atk_obj = gtk_widget_get_accessible (GTK_WIDGET(cal_view));
    if (!EA_IS_CAL_VIEW (atk_obj))
        return;
    ea_cal_view = EA_CAL_VIEW (atk_obj);

    if ((E_IS_DAY_VIEW (cal_view)) && event && event->canvas_item) {
        event_atk_obj =
            ea_calendar_helpers_get_accessible_for (event->canvas_item);
    }
    else if ((E_IS_WEEK_VIEW (cal_view)) && event) {
        EWeekViewEventSpan *span;
        EWeekViewEvent *week_view_event = (EWeekViewEvent *)event;
        EWeekView *week_view = E_WEEK_VIEW (cal_view);
        /* get the first span of the event */
        span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                       week_view_event->spans_index);
        if (span && span->text_item)
            event_atk_obj = ea_calendar_helpers_get_accessible_for (span->text_item);

    }
    if (event_atk_obj) {
        index = atk_object_get_index_in_parent (event_atk_obj);
        if (index < 0)
            return;
#ifdef ACC_DEBUG
        printf ("AccDebug: event=%p added\n", event);
#endif
        g_signal_emit_by_name (atk_obj, "children_changed::add",
                       index, event_atk_obj, NULL);
    }
}

static void
ea_cal_view_dates_change_cb (GnomeCalendar *gcal, gpointer data)
{
    AtkObject *atk_obj;

    g_return_if_fail (GNOME_IS_CALENDAR (gcal));
    g_return_if_fail (data);
    g_return_if_fail (EA_IS_CAL_VIEW (data));

    atk_obj = ATK_OBJECT(data);
    if (atk_obj->name) {
        g_free (atk_obj->name);
        atk_obj->name = NULL;
    }
    g_object_notify (G_OBJECT (data), "accessible-name");
    g_signal_emit_by_name (data, "visible_data_changed");
}