path: root/calendar/gui/ea-day-view-main-item.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:
 *      Bolian Yin <bolian.yin@sun.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "ea-day-view-main-item.h"
#include "e-day-view-top-item.h"
#include "ea-day-view.h"
#include "ea-day-view-cell.h"
#include "ea-cell-table.h"
#include <glib/gi18n.h>

/* EaDayViewMainItem */
static void ea_day_view_main_item_class_init (EaDayViewMainItemClass *klass);

static void ea_day_view_main_item_finalize  (GObject *object);
static const gchar *
        ea_day_view_main_item_get_name  (AtkObject *accessible);
static const gchar *
        ea_day_view_main_item_get_description
                        (AtkObject *accessible);

static gint         ea_day_view_main_item_get_n_children (AtkObject *obj);
static AtkObject*   ea_day_view_main_item_ref_child (AtkObject *obj,
                             gint i);
static AtkObject * ea_day_view_main_item_get_parent (AtkObject *accessible);
static gint ea_day_view_main_item_get_index_in_parent (AtkObject *accessible);

/* callbacks */
static void ea_day_view_main_item_dates_change_cb (GnomeCalendar *gcal, gpointer data);
static void ea_day_view_main_item_time_change_cb (EDayView *day_view, gpointer data);

/* component interface */
static void atk_component_interface_init (AtkComponentIface *iface);
static void component_interface_get_extents (AtkComponent *component,
                         gint *x, gint *y,
                         gint *width, gint *height,
                         AtkCoordType coord_type);
/* atk table interface */
static void atk_table_interface_init (AtkTableIface *iface);
static gint table_interface_get_index_at (AtkTable *table,
                      gint     row,
                      gint     column);
static gint table_interface_get_column_at_index (AtkTable *table,
                         gint     index);
static gint table_interface_get_row_at_index (AtkTable *table,
                          gint     index);
static AtkObject* table_interface_ref_at (AtkTable *table,
                      gint     row,
                      gint     column);
static gint table_interface_get_n_rows (AtkTable *table);
static gint table_interface_get_n_columns (AtkTable *table);
static gint table_interface_get_column_extent_at (AtkTable      *table,
                          gint          row,
                          gint          column);
static gint table_interface_get_row_extent_at (AtkTable      *table,
                           gint          row,
                           gint          column);

static gboolean table_interface_is_row_selected (AtkTable *table,
                         gint     row);
static gboolean table_interface_is_column_selected (AtkTable *table,
                            gint     row);
static gboolean table_interface_is_selected (AtkTable *table,
                         gint     row,
                         gint     column);
static gint table_interface_get_selected_rows (AtkTable *table,
                           gint **rows_selected);
static gint table_interface_get_selected_columns (AtkTable *table,
                          gint     **columns_selected);
static gboolean table_interface_add_row_selection (AtkTable *table, gint row);
static gboolean table_interface_remove_row_selection (AtkTable *table,
                              gint row);
static gboolean table_interface_add_column_selection (AtkTable *table,
                              gint column);
static gboolean table_interface_remove_column_selection (AtkTable *table,
                             gint column);
static AtkObject* table_interface_get_row_header (AtkTable *table, gint row);
static AtkObject* table_interface_get_column_header (AtkTable *table,
                             gint in_col);
static AtkObject* table_interface_get_caption (AtkTable *table);

static const gchar *
table_interface_get_column_description (AtkTable *table, gint in_col);

static const gchar *
table_interface_get_row_description (AtkTable *table, gint row);

static AtkObject* table_interface_get_summary (AtkTable *table);

/* atk selection interface */
static void atk_selection_interface_init (AtkSelectionIface *iface);
static gboolean selection_interface_add_selection (AtkSelection *selection,
                           gint i);
static gboolean selection_interface_clear_selection (AtkSelection *selection);
static AtkObject* selection_interface_ref_selection (AtkSelection *selection,
                             gint i);
static gint selection_interface_get_selection_count (AtkSelection *selection);
static gboolean selection_interface_is_child_selected (AtkSelection *selection,
                               gint i);

/* helpers */
static EaCellTable *
ea_day_view_main_item_get_cell_data (EaDayViewMainItem *ea_main_item);

static void
ea_day_view_main_item_destory_cell_data (EaDayViewMainItem *ea_main_item);

static gint
ea_day_view_main_item_get_child_index_at (EaDayViewMainItem *ea_main_item,
                      gint row, gint column);
static gint
ea_day_view_main_item_get_row_at_index (EaDayViewMainItem *ea_main_item,
                    gint index);
static gint
ea_day_view_main_item_get_column_at_index (EaDayViewMainItem *ea_main_item,
                       gint index);
static gint
ea_day_view_main_item_get_row_label (EaDayViewMainItem *ea_main_item,
                     gint row, gchar *buffer,
                     gint buffer_size);

#ifdef ACC_DEBUG
static gint n_ea_day_view_main_item_created = 0;
static gint n_ea_day_view_main_item_destroyed = 0;
#endif

static gpointer parent_class = NULL;

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

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

        static const GInterfaceInfo atk_component_info = {
            (GInterfaceInitFunc) atk_component_interface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

        static const GInterfaceInfo atk_table_info = {
            (GInterfaceInitFunc) atk_table_interface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };
        static const GInterfaceInfo atk_selection_info = {
            (GInterfaceInitFunc) atk_selection_interface_init,
            (GInterfaceFinalizeFunc) NULL,
            NULL
        };

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

        factory = atk_registry_get_factory (atk_get_default_registry (),
                            e_day_view_main_item_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,
                           "EaDayViewMainItem", &tinfo, 0);
        g_type_add_interface_static (type, ATK_TYPE_COMPONENT,
                         &atk_component_info);
        g_type_add_interface_static (type, ATK_TYPE_TABLE,
                         &atk_table_info);
        g_type_add_interface_static (type, ATK_TYPE_SELECTION,
                         &atk_selection_info);
    }

    return type;
}

static void
ea_day_view_main_item_class_init (EaDayViewMainItemClass *klass)
{
    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);

    gobject_class->finalize = ea_day_view_main_item_finalize;
    parent_class = g_type_class_peek_parent (klass);

    class->get_name = ea_day_view_main_item_get_name;
    class->get_description = ea_day_view_main_item_get_description;

    class->get_n_children = ea_day_view_main_item_get_n_children;
    class->ref_child = ea_day_view_main_item_ref_child;
    class->get_parent = ea_day_view_main_item_get_parent;
    class->get_index_in_parent = ea_day_view_main_item_get_index_in_parent;
}

AtkObject*
ea_day_view_main_item_new (GObject *obj)
{
    AtkObject *accessible;
    GnomeCalendar *gcal;
    EDayViewMainItem *main_item;
    EDayView *day_view;

    g_return_val_if_fail (E_IS_DAY_VIEW_MAIN_ITEM (obj), NULL);

    accessible = ATK_OBJECT (g_object_new (EA_TYPE_DAY_VIEW_MAIN_ITEM,
                           NULL));

    atk_object_initialize (accessible, obj);
    accessible->role = ATK_ROLE_TABLE;

#ifdef ACC_DEBUG
    ++n_ea_day_view_main_item_created;
    printf ("ACC_DEBUG: n_ea_day_view_main_item_created = %d\n",
        n_ea_day_view_main_item_created);
#endif

    main_item = E_DAY_VIEW_MAIN_ITEM (obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    g_signal_connect (
        day_view, "selected_time_changed",
        G_CALLBACK (ea_day_view_main_item_time_change_cb),
        accessible);

    /* listen for date changes of calendar */
    gcal = e_calendar_view_get_calendar (E_CALENDAR_VIEW (day_view));
    if (gcal)
        g_signal_connect (gcal, "dates_shown_changed",
                  G_CALLBACK (ea_day_view_main_item_dates_change_cb),
                  accessible);

    return accessible;
}

static void
ea_day_view_main_item_finalize (GObject *object)
{
    EaDayViewMainItem *ea_main_item;

    g_return_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (object));

    ea_main_item = EA_DAY_VIEW_MAIN_ITEM (object);

    /* Free the allocated cell data */
    ea_day_view_main_item_destory_cell_data (ea_main_item);

    G_OBJECT_CLASS (parent_class)->finalize (object);
#ifdef ACC_DEBUG
    ++n_ea_day_view_main_item_destroyed;
    printf ("ACC_DEBUG: n_ea_day_view_main_item_destroyed = %d\n",
        n_ea_day_view_main_item_destroyed);
#endif
}

static const gchar *
ea_day_view_main_item_get_name (AtkObject *accessible)
{
    AtkObject *parent;
    g_return_val_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (accessible), NULL);
    parent = atk_object_get_parent (accessible);

    if (!parent)
        return NULL;

    return atk_object_get_name (parent);
}

static const gchar *
ea_day_view_main_item_get_description (AtkObject *accessible)
{
    return _("a table to view and select the current time range");
}

static gint
ea_day_view_main_item_get_n_children (AtkObject *accessible)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;

    g_return_val_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (accessible), -1);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    return day_view->rows * day_view->days_shown;
}

static AtkObject *
ea_day_view_main_item_ref_child (AtkObject *accessible, gint index)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    gint n_children;
    EDayViewCell *cell;
    EaCellTable *cell_data;
    EaDayViewMainItem *ea_main_item;

    g_return_val_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (accessible), NULL);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return NULL;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    n_children = ea_day_view_main_item_get_n_children (accessible);
    if (index < 0 || index >= n_children)
        return NULL;

    ea_main_item = EA_DAY_VIEW_MAIN_ITEM (accessible);
    cell_data = ea_day_view_main_item_get_cell_data (ea_main_item);
    if (!cell_data)
        return NULL;

    cell = ea_cell_table_get_cell_at_index (cell_data, index);
    if (!cell) {
        gint row, column;

        row = ea_day_view_main_item_get_row_at_index (ea_main_item, index);
        column = ea_day_view_main_item_get_column_at_index (ea_main_item, index);
        cell = e_day_view_cell_new (day_view, row, column);
        ea_cell_table_set_cell_at_index (cell_data, index, cell);
        g_object_unref (cell);
    }
    return g_object_ref (atk_gobject_accessible_for_object (G_OBJECT (cell)));
}

static AtkObject *
ea_day_view_main_item_get_parent (AtkObject *accessible)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;

    g_return_val_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (accessible), NULL);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return NULL;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    return gtk_widget_get_accessible (GTK_WIDGET (day_view));
}

static gint
ea_day_view_main_item_get_index_in_parent (AtkObject *accessible)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;

    g_return_val_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (accessible), -1);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    /* always the first child of ea-day-view */
    return 0;
}

/* callbacks */

static void
ea_day_view_main_item_dates_change_cb (GnomeCalendar *gcal, gpointer data)
{
    EaDayViewMainItem *ea_main_item;

    g_return_if_fail (GNOME_IS_CALENDAR (gcal));
    g_return_if_fail (data);
    g_return_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (data));

    ea_main_item = EA_DAY_VIEW_MAIN_ITEM (data);

#ifdef ACC_DEBUG
    printf ("EvoAcc: ea_day_view_main_item update cb\n");
#endif

    ea_day_view_main_item_destory_cell_data (ea_main_item);
}

static void
ea_day_view_main_item_time_change_cb (EDayView *day_view, gpointer data)
{
    EaDayViewMainItem *ea_main_item;
    AtkObject *item_cell = NULL;

    g_return_if_fail (E_IS_DAY_VIEW (day_view));
    g_return_if_fail (data);
    g_return_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (data));

    ea_main_item = EA_DAY_VIEW_MAIN_ITEM (data);

#ifdef ACC_DEBUG
    printf ("EvoAcc: ea_day_view_main_item time changed cb\n");
#endif
    /* only deal with the first selected child, for now */
    item_cell = atk_selection_ref_selection (ATK_SELECTION (ea_main_item),
                         0);
    if (item_cell) {
        AtkStateSet *state_set;
        state_set = atk_object_ref_state_set (item_cell);
        atk_state_set_add_state (state_set, ATK_STATE_FOCUSED);
        g_object_unref (state_set);

        g_signal_emit_by_name (ea_main_item,
                   "active-descendant-changed",
                   item_cell);
        g_signal_emit_by_name (data, "selection_changed");

        atk_focus_tracker_notify (item_cell);
        g_object_unref (item_cell);
    }

}

/* helpers */

static gint
ea_day_view_main_item_get_child_index_at (EaDayViewMainItem *ea_main_item,
                      gint row, gint column)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;

    g_return_val_if_fail (ea_main_item, -1);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (row >= 0 && row < day_view->rows &&
        column >= 0 && column < day_view->days_shown)
        return column * day_view->rows + row;
    return -1;
}

static gint
ea_day_view_main_item_get_row_at_index (EaDayViewMainItem *ea_main_item,
                    gint index)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    gint n_children;

    g_return_val_if_fail (ea_main_item, -1);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    n_children = ea_day_view_main_item_get_n_children (ATK_OBJECT (ea_main_item));
    if (index >= 0 && index < n_children)
        return index % day_view->rows;
    return -1;
}

static gint
ea_day_view_main_item_get_column_at_index (EaDayViewMainItem *ea_main_item,
                       gint index)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    gint n_children;

    g_return_val_if_fail (ea_main_item, -1);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    n_children = ea_day_view_main_item_get_n_children (ATK_OBJECT (ea_main_item));
    if (index >= 0 && index < n_children)
        return index / day_view->rows;
    return -1;
}

static gint
ea_day_view_main_item_get_row_label (EaDayViewMainItem *ea_main_item,
                     gint row, gchar *buffer, gint buffer_size)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    ECalendarView *cal_view;
    const gchar *suffix;
    gint time_divisions;
    gint hour, minute, suffix_width;

    g_return_val_if_fail (ea_main_item, 0);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return 0;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    cal_view = E_CALENDAR_VIEW (day_view);
    time_divisions = e_calendar_view_get_time_divisions (cal_view);

    hour = day_view->first_hour_shown;
    minute = day_view->first_minute_shown;
    minute += row * time_divisions;
    hour = (hour + minute / 60) % 24;
    minute %= 60;

    e_day_view_convert_time_to_display (day_view, hour, &hour,
                        &suffix, &suffix_width);
    return g_snprintf (buffer, buffer_size, "%i:%02i %s",
            hour, minute, suffix);
}

static EaCellTable *
ea_day_view_main_item_get_cell_data (EaDayViewMainItem *ea_main_item)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaCellTable *cell_data;

    g_return_val_if_fail (ea_main_item, NULL);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return NULL;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    cell_data = g_object_get_data (G_OBJECT (ea_main_item),
                       "ea-day-view-cell-table");
    if (!cell_data) {
        cell_data = ea_cell_table_create (day_view->rows,
                          day_view->days_shown, TRUE);
        g_object_set_data (G_OBJECT (ea_main_item),
                   "ea-day-view-cell-table", cell_data);
    }
    return cell_data;
}

static void
ea_day_view_main_item_destory_cell_data (EaDayViewMainItem *ea_main_item)
{
    EaCellTable *cell_data;

    g_return_if_fail (ea_main_item);

    cell_data = g_object_get_data (G_OBJECT (ea_main_item),
                       "ea-day-view-cell-table");
    if (cell_data) {
        g_object_set_data (G_OBJECT (ea_main_item),
                   "ea-day-view-cell-table", NULL);
        ea_cell_table_destroy (cell_data);
    }
}

/* Atk Component Interface */

static void
atk_component_interface_init (AtkComponentIface *iface)
{
    g_return_if_fail (iface != NULL);

    iface->get_extents = component_interface_get_extents;
}

static void
component_interface_get_extents (AtkComponent *component,
                 gint *x, gint *y, gint *width, gint *height,
                 AtkCoordType coord_type)
{
    GObject *g_obj;
    AtkObject *ea_canvas;
    EDayViewMainItem *main_item;
    EDayView *day_view;

    *x = *y = *width = *height = 0;

    g_return_if_fail (EA_IS_DAY_VIEW_MAIN_ITEM (component));

    g_obj = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (component));
    if (!g_obj)
        /* defunct object*/
        return;
    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    ea_canvas = gtk_widget_get_accessible (day_view->main_canvas);
    atk_component_get_extents (ATK_COMPONENT (ea_canvas), x, y,
                   width, height, coord_type);
}

/* atk table interface */

static void
atk_table_interface_init (AtkTableIface *iface)
{
    g_return_if_fail (iface != NULL);

    iface->ref_at = table_interface_ref_at;

    iface->get_n_rows = table_interface_get_n_rows;
    iface->get_n_columns = table_interface_get_n_columns;
    iface->get_index_at = table_interface_get_index_at;
    iface->get_column_at_index = table_interface_get_column_at_index;
    iface->get_row_at_index = table_interface_get_row_at_index;
    iface->get_column_extent_at = table_interface_get_column_extent_at;
    iface->get_row_extent_at = table_interface_get_row_extent_at;

    iface->is_selected = table_interface_is_selected;
    iface->get_selected_rows = table_interface_get_selected_rows;
    iface->get_selected_columns = table_interface_get_selected_columns;
    iface->is_row_selected = table_interface_is_row_selected;
    iface->is_column_selected = table_interface_is_column_selected;
    iface->add_row_selection = table_interface_add_row_selection;
    iface->remove_row_selection = table_interface_remove_row_selection;
    iface->add_column_selection = table_interface_add_column_selection;
    iface->remove_column_selection = table_interface_remove_column_selection;

    iface->get_row_header = table_interface_get_row_header;
    iface->get_column_header = table_interface_get_column_header;
    iface->get_caption = table_interface_get_caption;
    iface->get_summary = table_interface_get_summary;
    iface->get_row_description = table_interface_get_row_description;
    iface->get_column_description = table_interface_get_column_description;
}

static AtkObject*
table_interface_ref_at (AtkTable *table,
            gint     row,
            gint     column)
{
    gint index;

    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                              row, column);
    return ea_day_view_main_item_ref_child (ATK_OBJECT (ea_main_item), index);
}

static gint
table_interface_get_n_rows (AtkTable *table)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    return day_view->rows;
}

static gint
table_interface_get_n_columns (AtkTable *table)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    return day_view->days_shown;
}

static gint
table_interface_get_index_at (AtkTable *table,
                  gint     row,
                  gint     column)
{
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    return ea_day_view_main_item_get_child_index_at (ea_main_item,
                             row, column);
}

static gint
table_interface_get_column_at_index (AtkTable *table,
                     gint     index)
{
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    return ea_day_view_main_item_get_column_at_index (ea_main_item, index);
}

static gint
table_interface_get_row_at_index (AtkTable *table,
                  gint     index)
{
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    return ea_day_view_main_item_get_row_at_index (ea_main_item, index);
}

static gint
table_interface_get_column_extent_at (AtkTable      *table,
                      gint          row,
                      gint          column)
{
    gint index;
    gint width = 0, height = 0;
    AtkObject *child;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

    index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                              row, column);
    child = atk_object_ref_accessible_child (ATK_OBJECT (ea_main_item),
                         index);
    if (child)
        atk_component_get_size (ATK_COMPONENT (child),
                    &width, &height);

    return width;
}

static gint
table_interface_get_row_extent_at (AtkTable      *table,
                   gint          row,
                   gint          column)
{
    gint index;
    gint width = 0, height = 0;
    AtkObject *child;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

    index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                              row, column);
    child = atk_object_ref_accessible_child (ATK_OBJECT (ea_main_item),
                         index);
    if (child)
        atk_component_get_size (ATK_COMPONENT (child),
                    &width, &height);

    return height;
}

static gboolean
table_interface_is_row_selected (AtkTable *table,
                 gint     row)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (day_view->selection_start_day == -1)
        /* no selection */
        return FALSE;
    if (day_view->selection_start_day != day_view->selection_end_day)
        /* all row is selected */
        return TRUE;
    if (row >= day_view->selection_start_row &&
        row <= day_view->selection_end_row)
        return TRUE;
    return FALSE;
}

static gboolean
table_interface_is_selected (AtkTable *table,
                 gint     row,
                 gint     column)
{
    return table_interface_is_row_selected (table, row) &&
        table_interface_is_column_selected (table, column);
}

static gboolean
table_interface_is_column_selected (AtkTable *table,
                    gint     column)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (column >= day_view->selection_start_day &&
        column <= day_view->selection_end_day)
        return TRUE;
    return FALSE;
}

static gint
table_interface_get_selected_rows (AtkTable *table,
                   gint     **rows_selected)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    gint start_row = -1, n_rows = 0;

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (day_view->selection_start_day == -1)
        return 0;

    if (day_view->selection_start_day != day_view->selection_end_day) {
        /* all the rows should be selected */
        n_rows = day_view->rows;
        start_row = 0;
    }
    else if (day_view->selection_start_row != -1) {
        start_row = day_view->selection_start_row;
        n_rows = day_view->selection_end_row - start_row + 1;
    }
    if (n_rows > 0 && start_row != -1 && rows_selected) {
        gint index;

        *rows_selected = (gint *) g_malloc (n_rows * sizeof (gint));
        for (index = 0; index < n_rows; ++index)
            (*rows_selected)[index] = start_row + index;
    }
    return n_rows;
}

static gint
table_interface_get_selected_columns (AtkTable *table,
                      gint **columns_selected)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    gint start_column = -1, n_columns = 0;

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return -1;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (day_view->selection_start_day == -1)
        return 0;

    start_column = day_view->selection_start_day;
    n_columns = day_view->selection_end_day - start_column + 1;
    if (n_columns > 0 && start_column != -1 && columns_selected) {
        gint index;

        *columns_selected = (gint *) g_malloc (n_columns * sizeof (gint));
        for (index = 0; index < n_columns; ++index)
            (*columns_selected)[index] = start_column + index;
    }
    return n_columns;
}

static gboolean
table_interface_add_row_selection (AtkTable *table,
                   gint row)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    /* FIXME: we need multi-selection */

    day_view->selection_start_day = 0;
    day_view->selection_end_day = 0;
    day_view->selection_start_row = row;
    day_view->selection_end_row = row;

    e_day_view_ensure_rows_visible (day_view,
                    day_view->selection_start_row,
                    day_view->selection_end_row);
    e_day_view_update_calendar_selection_time (day_view);
    gtk_widget_queue_draw (day_view->main_canvas);
    return TRUE;
}

static gboolean
table_interface_remove_row_selection (AtkTable *table,
                      gint row)
{
    return FALSE;
}

static gboolean
table_interface_add_column_selection (AtkTable *table,
                      gint column)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    /* FIXME: we need multi-selection */

    day_view->selection_start_day = column;
    day_view->selection_end_day = column;
    day_view->selection_start_row = 0;
    day_view->selection_end_row = day_view->rows;

    e_day_view_update_calendar_selection_time (day_view);
    gtk_widget_queue_draw (day_view->main_canvas);
    return TRUE;
}

static gboolean
table_interface_remove_column_selection (AtkTable *table,
                     gint     column)
{
    /* FIXME: NOT IMPLEMENTED */
    return FALSE;
}

static AtkObject*
table_interface_get_row_header (AtkTable *table,
                gint     row)
{
    /* FIXME: NOT IMPLEMENTED */
    return NULL;
}

static AtkObject*
table_interface_get_column_header (AtkTable *table,
                   gint     in_col)
{
    /* FIXME: NOT IMPLEMENTED */
    return NULL;
}

static AtkObject*
table_interface_get_caption (AtkTable   *table)
{
    /* FIXME: NOT IMPLEMENTED */
    return NULL;
}

static const gchar *
table_interface_get_column_description (AtkTable      *table,
                    gint       in_col)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    const gchar *description;
    EaCellTable *cell_data;

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return NULL;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (in_col < 0 || in_col >= day_view->days_shown)
        return NULL;
    cell_data = ea_day_view_main_item_get_cell_data (ea_main_item);
    if (!cell_data)
        return NULL;

    description = ea_cell_table_get_column_label (cell_data, in_col);
    if (!description) {
        gchar buffer[128];
        e_day_view_top_item_get_day_label (day_view, in_col, buffer, 128);
        ea_cell_table_set_column_label (cell_data, in_col, buffer);
        description = ea_cell_table_get_column_label (cell_data, in_col);
    }
    return description;
}

static const gchar *
table_interface_get_row_description (AtkTable    *table,
                     gint        row)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (table);
    const gchar *description;
    EaCellTable *cell_data;

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return NULL;

    if (row < 0 || row >= 12 * 24)
        return NULL;
    cell_data = ea_day_view_main_item_get_cell_data (ea_main_item);
    if (!cell_data)
        return NULL;

    description = ea_cell_table_get_row_label (cell_data, row);
    if (!description) {
        gchar buffer[128];
        ea_day_view_main_item_get_row_label (
            ea_main_item, row, buffer, sizeof (buffer));
        ea_cell_table_set_row_label (cell_data, row, buffer);
        description = ea_cell_table_get_row_label (cell_data,
                                row);
    }
    return description;
}

static AtkObject*
table_interface_get_summary (AtkTable   *table)
{
    /* FIXME: NOT IMPLEMENTED */
    return NULL;
}

/* atkselection interface */

static void
atk_selection_interface_init (AtkSelectionIface *iface)
{
    g_return_if_fail (iface != NULL);

    iface->add_selection = selection_interface_add_selection;
    iface->clear_selection = selection_interface_clear_selection;
    iface->ref_selection = selection_interface_ref_selection;
    iface->get_selection_count = selection_interface_get_selection_count;
    iface->is_child_selected = selection_interface_is_child_selected;
}

static gboolean
selection_interface_add_selection (AtkSelection *selection, gint i)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (selection);
    gint column, row;

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    row = ea_day_view_main_item_get_row_at_index (ea_main_item, i);
    column = ea_day_view_main_item_get_column_at_index (ea_main_item, i);

    if (row == -1 || column == -1)
        return FALSE;

    /*FIXME: multi-selection is needed */
    day_view->selection_start_day = column;
    day_view->selection_end_day = column;
    day_view->selection_start_row = row;
    day_view->selection_end_row = row;

    e_day_view_ensure_rows_visible (day_view,
                    day_view->selection_start_row,
                    day_view->selection_end_row);
    e_day_view_update_calendar_selection_time (day_view);
    gtk_widget_queue_draw (day_view->main_canvas);
    return TRUE;
}

static gboolean
selection_interface_clear_selection (AtkSelection *selection)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (selection);

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    day_view->selection_start_row = -1;
    day_view->selection_start_day = -1;
    day_view->selection_end_row = -1;
    day_view->selection_end_day = -1;

    e_day_view_update_calendar_selection_time (day_view);
    gtk_widget_queue_draw (day_view->main_canvas);

    return TRUE;
}

static AtkObject*
selection_interface_ref_selection (AtkSelection *selection, gint i)
{
    gint count;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (selection);
    gint start_index;

    count = selection_interface_get_selection_count (selection);
    if (i < 0 || i >=count)
        return NULL;

    g_obj = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE (ea_main_item));

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    start_index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                                day_view->selection_start_row,
                                day_view->selection_start_day);

    return ea_day_view_main_item_ref_child (ATK_OBJECT (selection), start_index + i);
}

static gint
selection_interface_get_selection_count (AtkSelection *selection)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (selection);
    gint start_index, end_index;

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (ea_main_item);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj)
        return 0;

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    if (day_view->selection_start_day == -1 ||
        day_view->selection_start_row == -1)
        return 0;
    start_index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                                day_view->selection_start_row,
                                day_view->selection_start_day);
    end_index = ea_day_view_main_item_get_child_index_at (ea_main_item,
                                day_view->selection_end_row,
                                day_view->selection_end_day);

    return end_index - start_index + 1;
}

static gboolean
selection_interface_is_child_selected (AtkSelection *selection, gint i)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    EDayViewMainItem *main_item;
    EDayView *day_view;
    EaDayViewMainItem* ea_main_item = EA_DAY_VIEW_MAIN_ITEM (selection);
    gint column, row;

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

    main_item = E_DAY_VIEW_MAIN_ITEM (g_obj);
    day_view = e_day_view_main_item_get_day_view (main_item);

    row = ea_day_view_main_item_get_row_at_index (ea_main_item, i);
    column = ea_day_view_main_item_get_column_at_index (ea_main_item, i);

    if (column < day_view->selection_start_day ||
        column > day_view->selection_end_day)
        return FALSE;

    if ((column == day_view->selection_start_day ||
         column == day_view->selection_end_day) &&
        (row < day_view->selection_start_row ||
         row > day_view->selection_end_row))
        return FALSE;

    /* if comes here, the cell is selected */
    return TRUE;
}