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

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* vim:expandtab:shiftwidth=8:tabstop=8:
 */
/* Evolution Accessibility: ea-day-view.c
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 * 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., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * Author: Bolian Yin <bolian.yin@sun.com> Sun Microsystem Inc., 2003
 *
 */

#include "ea-day-view.h"
#include "ea-cal-view-event.h"

#include "ea-calendar-helpers.h"
#include "ea-gnome-calendar.h"
#include "calendar-commands.h"
#include <glib.h>
#include <glib/gi18n.h>

static void ea_day_view_class_init (EaDayViewClass *klass);

static G_CONST_RETURN gchar* ea_day_view_get_name (AtkObject *accessible);
static G_CONST_RETURN gchar* ea_day_view_get_description (AtkObject *accessible);
static gint         ea_day_view_get_n_children      (AtkObject *obj);
static AtkObject*   ea_day_view_ref_child           (AtkObject *obj,
                                                     gint i);
static gpointer parent_class = NULL;

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

    if (!type) {
        static GTypeInfo tinfo = {
            sizeof (EaDayViewClass),
            (GBaseInitFunc) NULL, /* base init */
            (GBaseFinalizeFunc) NULL, /* base finalize */
            (GClassInitFunc) ea_day_view_class_init, /* class init */
            (GClassFinalizeFunc) NULL, /* class finalize */
            NULL, /* class data */
            sizeof (EaDayView), /* 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 (EaCalView, in this case)
         *
         * Note: we must still use run-time deriving here, because
         * our parent class EaCalView is run-time deriving.
         */

        factory = atk_registry_get_factory (atk_get_default_registry (),
                            e_calendar_view_get_type());
        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,
                           "EaDayView", &tinfo, 0);
    }

    return type;
}

static void
ea_day_view_class_init (EaDayViewClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    class->get_name = ea_day_view_get_name;
    class->get_description = ea_day_view_get_description;

    class->get_n_children = ea_day_view_get_n_children;
    class->ref_child = ea_day_view_ref_child;
}

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

    g_return_val_if_fail (E_IS_DAY_VIEW (widget), NULL);

    object = g_object_new (EA_TYPE_DAY_VIEW, NULL);

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

#ifdef ACC_DEBUG
    printf ("EvoAcc: ea_day_view created %p\n", (void *)accessible);
#endif

    return accessible;
}

static G_CONST_RETURN gchar*
ea_day_view_get_name (AtkObject *accessible)
{
    EDayView *day_view;
    GnomeCalendar *gcal;
    const gchar *label_text;
    GnomeCalendarViewType view_type;
    gint n_events;
    gchar *event_str, *name_str;

    g_return_val_if_fail (EA_IS_DAY_VIEW (accessible), NULL);

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

    day_view = E_DAY_VIEW (GTK_ACCESSIBLE (accessible)->widget);
    gcal = e_calendar_view_get_calendar (E_CALENDAR_VIEW (day_view));
    if (!GTK_WIDGET_VISIBLE (GTK_WIDGET (gcal)))
        return NULL;

    label_text = ea_gnome_calendar_get_label_description (gcal);

    n_events = atk_object_get_n_accessible_children (accessible);
    /* the child main item is always there */
    --n_events;
    if (n_events >= 1)
        /* To translators: Here, "It" is either like "Work Week View: July
        10th - July 14th, 2006." or "Day View: Thursday July 13th, 2006." */
        event_str = g_strdup_printf (ngettext ("It has %d event.", "It has %d events.", n_events), n_events);
    else
        /* To translators: Here, "It" is either like "Work Week View: July
        10th - July 14th, 2006." or "Day View: Thursday July 13th, 2006." */
        event_str = g_strdup (_("It has no events."));

    view_type = gnome_calendar_get_view (gcal);
    if (view_type == GNOME_CAL_WORK_WEEK_VIEW)
        /* To translators: First %s is the week, for example "July 10th -
        July 14th, 2006". Second %s is the number of events in this work
        week, for example "It has %d event/events." or  "It has no events." */
        name_str = g_strdup_printf (_("Work Week View: %s. %s"),
                        label_text, event_str);
    else
        /* To translators: First %s is the day, for example "Thursday July
        13th, 2006". Second %s is the number of events on this day, for
        example "It has %d event/events." or  "It has no events." */
        name_str = g_strdup_printf (_("Day View: %s. %s"),
                        label_text, event_str);

    ATK_OBJECT_CLASS (parent_class)->set_name (accessible, name_str);
    g_free (name_str);
    g_free (event_str);

    return accessible->name;
}

static G_CONST_RETURN gchar*
ea_day_view_get_description (AtkObject *accessible)
{
    EDayView *day_view;

    g_return_val_if_fail (EA_IS_DAY_VIEW (accessible), NULL);

    if (!GTK_ACCESSIBLE (accessible)->widget)
        return NULL;
    day_view = E_DAY_VIEW (GTK_ACCESSIBLE (accessible)->widget);

    if (accessible->description)
        return accessible->description;
    else {
        GnomeCalendar *gcal;
        GnomeCalendarViewType view_type;

        gcal = e_calendar_view_get_calendar (E_CALENDAR_VIEW (day_view));
        view_type = gnome_calendar_get_view (gcal);

        if (view_type == GNOME_CAL_WORK_WEEK_VIEW)
            return _("calendar view for a work week");
        else
            return _("calendar view for one or more days");
    }
}

static gint
ea_day_view_get_n_children (AtkObject *accessible)
{
    EDayView *day_view;
    gint day;
    gint child_num = 0;

    g_return_val_if_fail (EA_IS_DAY_VIEW (accessible), -1);

    if (!GTK_ACCESSIBLE (accessible)->widget)
        return -1;

    day_view = E_DAY_VIEW (GTK_ACCESSIBLE (accessible)->widget);

    child_num += day_view->long_events->len;

    for (day = 0; day < day_view->days_shown; day++) {
        child_num += day_view->events[day]->len;
    }

    /* "+1" for the main item */
    return child_num + 1;
}

static AtkObject *
ea_day_view_ref_child (AtkObject *accessible, gint index)
{
    EDayView *day_view;
    gint child_num;
    gint day;
    AtkObject *atk_object = NULL;
    EDayViewEvent *event = NULL;

    g_return_val_if_fail (EA_IS_DAY_VIEW (accessible), NULL);

    child_num = atk_object_get_n_accessible_children (accessible);
    if (child_num <= 0 || index < 0 || index >= child_num)
        return NULL;

    if (!GTK_ACCESSIBLE (accessible)->widget)
        return NULL;
    day_view = E_DAY_VIEW (GTK_ACCESSIBLE (accessible)->widget);

    if (index == 0) {
        /* index == 0 is the main item */
        atk_object = atk_gobject_accessible_for_object (G_OBJECT (day_view->main_canvas_item));
        g_object_ref (atk_object);
    }
    else {
        --index;
        /* a long event */
        if (index < day_view->long_events->len) {
            event = &g_array_index (day_view->long_events,
                        EDayViewEvent, index);
        }
        else {
            index -= day_view->long_events->len;
            day = 0;
            while (index >= day_view->events[day]->len) {
                index -= day_view->events[day]->len;
                ++day;
            }

            event = &g_array_index (day_view->events[day],
                        EDayViewEvent, index);
        }
        if (event && event->canvas_item) {
            /* Not use atk_gobject_accessible_for_object here,
             * we need to do special thing here
             */
            atk_object = ea_calendar_helpers_get_accessible_for (event->canvas_item);
            g_object_ref (atk_object);
        }
    }
    return atk_object;
}