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

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* vim:expandtab:shiftwidth=8:tabstop=8:
 */
/* Evolution Accessibility: ea-week-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-week-view.h"
#include "ea-cal-view.h"
#include "ea-cal-view-event.h"
#include "ea-calendar-helpers.h"
#include "calendar-commands.h"
#include <gal/e-text/e-text.h>

static void ea_week_view_class_init (EaWeekViewClass *klass);

static G_CONST_RETURN gchar* ea_week_view_get_name (AtkObject *accessible);
static G_CONST_RETURN gchar* ea_week_view_get_description (AtkObject *accessible);
static gint         ea_week_view_get_n_children      (AtkObject *obj);
static AtkObject*   ea_week_view_ref_child           (AtkObject *obj,
                              gint i);

static gpointer parent_class = NULL;

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

    if (!type) {
        static GTypeInfo tinfo = {
            sizeof (EaWeekViewClass),
            (GBaseInitFunc) NULL, /* base init */
            (GBaseFinalizeFunc) NULL, /* base finalize */
            (GClassInitFunc) ea_week_view_class_init, /* class init */
            (GClassFinalizeFunc) NULL, /* class finalize */
            NULL, /* class data */
            sizeof (EaWeekView), /* 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,
                           "EaWeekView", &tinfo, 0);

    }

    return type;
}

static void
ea_week_view_class_init (EaWeekViewClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    class->get_name = ea_week_view_get_name;
    class->get_description = ea_week_view_get_description;

    class->get_n_children = ea_week_view_get_n_children;
    class->ref_child = ea_week_view_ref_child;
}

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

    g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);

    object = g_object_new (EA_TYPE_WEEK_VIEW, NULL);

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

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

    return accessible;
}

static G_CONST_RETURN gchar*
ea_week_view_get_name (AtkObject *accessible)
{
    EWeekView *week_view;
    GnomeCalendar *gcal;
    const gchar *label_text;
    GnomeCalendarViewType view_type;
    gchar buffer[128] = "";
    gint n_events;

    g_return_val_if_fail (EA_IS_WEEK_VIEW (accessible), NULL);

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

    gcal = e_calendar_view_get_calendar (E_CALENDAR_VIEW (week_view));
    label_text = calendar_get_text_for_folder_bar_label (gcal);

    n_events = atk_object_get_n_accessible_children (accessible);
    /* the child main item is always there */
    --n_events;
    if (n_events > 0)
        g_snprintf (buffer, sizeof (buffer),
                ", %d events", n_events);

    view_type = gnome_calendar_get_view (gcal);

    if (view_type == GNOME_CAL_MONTH_VIEW)
        accessible->name = g_strconcat ("month view :",
                        label_text, buffer,
                        NULL);

    else
        accessible->name = g_strconcat ("week view :",
                        label_text, buffer,
                        NULL);
    return accessible->name;
}

static G_CONST_RETURN gchar*
ea_week_view_get_description (AtkObject *accessible)
{
    EWeekView *week_view;

    g_return_val_if_fail (EA_IS_WEEK_VIEW (accessible), NULL);

    if (!GTK_ACCESSIBLE (accessible)->widget)
        return NULL;
    week_view = E_WEEK_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 (week_view));
        view_type = gnome_calendar_get_view (gcal);

        if (view_type == GNOME_CAL_MONTH_VIEW)
            return "calendar view for a month";
        else
            return "calendar view for one or more weeks";
    }
}

static gint
ea_week_view_get_n_children (AtkObject *accessible)
{
    EWeekView *week_view;
    GnomeCanvasGroup *canvas_group;
    gint i, count = 0;
    gint event_index;

    g_return_val_if_fail (EA_IS_WEEK_VIEW (accessible), -1);

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

    for (event_index = 0; event_index < week_view->events->len;
         ++event_index) {
        EWeekViewEvent *event;
        EWeekViewEventSpan *span;

                /* If week_view->spans == NULL, there is no visible events. */
                if (!week_view->spans)
                        break;

        event = &g_array_index (week_view->events,
                    EWeekViewEvent, event_index);
        if (!event)
            continue;
        span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                       event->spans_index + 0);

        if (!span)
            continue;

        /* at least one of the event spans is visible, count it */
        if (span->text_item)
            ++count;
    }

    /* add the number of visible jump buttons */
    for (i = 0; i < E_WEEK_VIEW_MAX_WEEKS * 7; i++) {
        if (week_view->jump_buttons[i]->object.flags & GNOME_CANVAS_ITEM_VISIBLE)
            ++count;
    }

    /* "+1" for the main item */
    count++;

#ifdef ACC_DEBUG
    printf("AccDebug: week view %p has %d children\n", (void *)week_view, count);
#endif
    return count;
}

static AtkObject *
ea_week_view_ref_child (AtkObject *accessible, gint index)
{
    EWeekView *week_view;
    gint child_num, max_count;
    AtkObject *atk_object = NULL;
    gint event_index;
    gint jump_button = -1;
    gint span_num = 0;
    gint count = 0;

    g_return_val_if_fail (EA_IS_WEEK_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;
    week_view = E_WEEK_VIEW (GTK_ACCESSIBLE (accessible)->widget);
    max_count = week_view->events->len;

    if (index == 0) {
        /* index == 0 is the main item */
        atk_object = atk_gobject_accessible_for_object (G_OBJECT (week_view->main_canvas_item));
        g_object_ref (atk_object);
    } else 
    for (event_index = 0; event_index < max_count; ++event_index) {
        EWeekViewEvent *event;
        EWeekViewEventSpan *span;
        gint current_day;

        event = &g_array_index (week_view->events,
                    EWeekViewEvent, event_index);
        if (!event)
            continue;

        span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                       event->spans_index + span_num);

        if (!span)
            continue;

        current_day = span->start_day;
        if (span->text_item)
            ++count;
        else if  (current_day != jump_button) {
            /* we should go to the jump button */
            jump_button = current_day;
            ++count;
        }
        else
            continue;

            if (count == index) {
            if (span->text_item) {
                /* Not use atk_gobject_accessible_for_object for event
                 * text_item we need to do special thing here
                 */
                atk_object = ea_calendar_helpers_get_accessible_for (span->text_item);
            }
            else {
                    atk_object = ea_calendar_helpers_get_accessible_for (week_view->jump_buttons[current_day == -1 ? 0 : current_day]);
            }
            g_object_ref (atk_object);
            break;
        }
    }

#ifdef ACC_DEBUG
    printf ("EvoAcc: ea_week_view_ref_child [%d]=%p\n",
        index, (void *)atk_object);
#endif
    return atk_object;
}