path: root/a11y/calendar/ea-cal-view-event.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)
 *
 */

#include "ea-cal-view-event.h"
#include "ea-calendar-helpers.h"
#include "ea-day-view.h"
#include "ea-week-view.h"
#include <text/e-text.h>
#include <glib/gi18n.h>

static void ea_cal_view_event_class_init (EaCalViewEventClass *klass);
static void ea_cal_view_event_init (EaCalViewEvent *a11y);

static void ea_cal_view_event_dispose (GObject *object);
static G_CONST_RETURN gchar* ea_cal_view_event_get_name (AtkObject *accessible);
static G_CONST_RETURN gchar* ea_cal_view_event_get_description (AtkObject *accessible);
static AtkObject* ea_cal_view_event_get_parent (AtkObject *accessible);
static gint ea_cal_view_event_get_index_in_parent (AtkObject *accessible);
static AtkStateSet *ea_cal_view_event_ref_state_set (AtkObject *accessible);

/* component interface */
static void atk_component_interface_init (AtkComponentIface *iface);
static void ea_cal_view_get_extents (AtkComponent *component,
                     gint *x, gint *y, gint *width, gint *height,
                     AtkCoordType coord_type);
/* action interface */
static void atk_action_interface_init (AtkActionIface *iface);
static gboolean ea_cal_view_event_do_action (AtkAction *action, gint i);
static gint ea_cal_view_event_get_n_actions (AtkAction *action);
static G_CONST_RETURN gchar* ea_cal_view_event_action_get_name (AtkAction *action, gint i);


#ifdef ACC_DEBUG
static gint n_ea_cal_view_event_created = 0, n_ea_cal_view_event_destroyed = 0;
static void ea_cal_view_finalize (GObject *object);
#endif

static gpointer parent_class = NULL;

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


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

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

                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 E_TEXT, in this case)
         */

        factory = atk_registry_get_factory (atk_get_default_registry (),
                            E_TYPE_TEXT);
        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, text and other interfaces from E_TEXT */
        type = g_type_register_static (derived_atk_type,
                           "EaCalViewEvent", &tinfo, 0);
        g_type_add_interface_static (type, ATK_TYPE_COMPONENT,
                         &atk_component_info);
                g_type_add_interface_static (type, ATK_TYPE_ACTION,
                                             &atk_action_info);


    }

    return type;
}

static void
ea_cal_view_event_class_init (EaCalViewEventClass *klass)
{
    AtkObjectClass *class = ATK_OBJECT_CLASS (klass);
    GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
#ifdef ACC_DEBUG
    gobject_class->finalize = ea_cal_view_finalize;
#endif

    parent_class = g_type_class_peek_parent (klass);

    gobject_class->dispose = ea_cal_view_event_dispose;

    class->get_name = ea_cal_view_event_get_name;
    class->get_description = ea_cal_view_event_get_description;
    class->get_parent = ea_cal_view_event_get_parent;
    class->get_index_in_parent = ea_cal_view_event_get_index_in_parent;
    class->ref_state_set = ea_cal_view_event_ref_state_set;

}

static void
ea_cal_view_event_init (EaCalViewEvent *a11y)
{
        a11y->state_set = atk_state_set_new ();
        atk_state_set_add_state (a11y->state_set, ATK_STATE_TRANSIENT);
        atk_state_set_add_state (a11y->state_set, ATK_STATE_ENABLED);
        atk_state_set_add_state (a11y->state_set, ATK_STATE_SENSITIVE);
        atk_state_set_add_state (a11y->state_set, ATK_STATE_SELECTABLE);
        atk_state_set_add_state (a11y->state_set, ATK_STATE_SHOWING);
        atk_state_set_add_state (a11y->state_set, ATK_STATE_FOCUSABLE);
}

#ifdef ACC_DEBUG
static void ea_cal_view_finalize (GObject *object)
{
    G_OBJECT_CLASS (parent_class)->finalize (object);

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

AtkObject*
ea_cal_view_event_new (GObject *obj)
{
    AtkObject *atk_obj = NULL;
    GObject *target_obj;
    ECalendarView *cal_view;

    g_return_val_if_fail (E_IS_TEXT (obj), NULL);
    cal_view = ea_calendar_helpers_get_cal_view_from (GNOME_CANVAS_ITEM (obj));
    if (!cal_view)
        return NULL;

    if (E_IS_WEEK_VIEW (cal_view)) {
        gint event_num, span_num;
        EWeekViewEvent *week_view_event;
        EWeekViewEventSpan *event_span;
        EWeekView *week_view = E_WEEK_VIEW (cal_view);

        /* for week view, we need to check if a atkobject exists for
         * the first span of the same event
         */
        if (!e_week_view_find_event_from_item (week_view,
                               GNOME_CANVAS_ITEM (obj),
                               &event_num,
                               &span_num))
            return NULL;
        week_view_event = &g_array_index (week_view->events,
                          EWeekViewEvent,
                          event_num);
        /* get the first span */
        event_span = &g_array_index (week_view->spans,
                         EWeekViewEventSpan,
                         week_view_event->spans_index);
        target_obj = G_OBJECT (event_span->text_item);
        atk_obj = g_object_get_data (target_obj, "accessible-object");

    }
    else
        target_obj = obj;

    if (!atk_obj) {
        static AtkRole event_role = ATK_ROLE_INVALID;
        atk_obj = ATK_OBJECT (g_object_new (EA_TYPE_CAL_VIEW_EVENT,
                            NULL));
        atk_object_initialize (atk_obj, target_obj);
        if (event_role == ATK_ROLE_INVALID)
            event_role = atk_role_register ("Calendar Event");
        atk_obj->role = event_role;
#ifdef ACC_DEBUG
        ++n_ea_cal_view_event_created;
        printf ("ACC_DEBUG: n_ea_cal_view_event_created = %d\n",
            n_ea_cal_view_event_created);
#endif
    }

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

    return atk_obj;
}

static void
ea_cal_view_event_dispose (GObject *object)
{
        EaCalViewEvent *a11y = EA_CAL_VIEW_EVENT (object);

        if (a11y->state_set) {
                g_object_unref (a11y->state_set);
                a11y->state_set = NULL;
        }

        if (G_OBJECT_CLASS(parent_class)->dispose)
                G_OBJECT_CLASS(parent_class)->dispose (object);
}

static G_CONST_RETURN gchar*
ea_cal_view_event_get_name (AtkObject *accessible)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    ECalendarViewEvent *event;
    gchar *name_string;
    gchar *alarm_string, *recur_string, *meeting_string, *summary_string;
        const char *summary;


    g_return_val_if_fail (EA_IS_CAL_VIEW_EVENT (accessible), NULL);

    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);
    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (!g_obj || !E_IS_TEXT (g_obj))
        return NULL;
    event = ea_calendar_helpers_get_cal_view_event_from (GNOME_CANVAS_ITEM(g_obj));

    alarm_string = recur_string = meeting_string = "";
    if (event && event->comp_data) {
        if (e_cal_util_component_has_alarms (event->comp_data->icalcomp))
            alarm_string = _("It has alarms.");

        if (e_cal_util_component_has_recurrences (event->comp_data->icalcomp))
            recur_string = _("It has recurrences.");

        if (e_cal_util_component_has_organizer (event->comp_data->icalcomp))
            meeting_string = _("It is a meeting.");

    }

    summary = icalcomponent_get_summary (event->comp_data->icalcomp);
    if (summary)
        summary_string = g_strdup_printf (_("Calendar Event: Summary is %s."), summary);
    else
        summary_string = g_strdup (_("Calendar Event: It has no summary."));

    name_string = g_strdup_printf ("%s %s %s %s", summary_string, alarm_string, recur_string, meeting_string);
    g_free (summary_string);

    ATK_OBJECT_CLASS (parent_class)->set_name (accessible, name_string);
#ifdef ACC_DEBUG
    printf("EvoAcc:  name for event accobj=%p, is %s\n",
           (void *)accessible, new_name);
#endif
    g_free (name_string);
    return accessible->name;
}

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

    return _("calendar view event");
}

static AtkObject *
ea_cal_view_event_get_parent (AtkObject *accessible)
{
    AtkGObjectAccessible *atk_gobj;
    GObject *g_obj;
    GnomeCanvasItem *canvas_item;
    ECalendarView *cal_view;

    g_return_val_if_fail (EA_IS_CAL_VIEW_EVENT (accessible), NULL);
    atk_gobj = ATK_GOBJECT_ACCESSIBLE (accessible);

    g_obj = atk_gobject_accessible_get_object (atk_gobj);
    if (g_obj == NULL)
        /* Object is defunct */
        return NULL;
    canvas_item = GNOME_CANVAS_ITEM (g_obj);

    cal_view = ea_calendar_helpers_get_cal_view_from (canvas_item);

    if (!cal_view)
        return NULL;

    return gtk_widget_get_accessible (GTK_WIDGET (cal_view));
}

static gint
ea_cal_view_event_get_index_in_parent (AtkObject *accessible)
{
    GObject *g_obj;
    GnomeCanvasItem *canvas_item;
    ECalendarView *cal_view;
    ECalendarViewEvent *cal_view_event;

    g_return_val_if_fail (EA_IS_CAL_VIEW_EVENT (accessible), -1);
    g_obj = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE(accessible));
    if (!g_obj)
        /* defunct object*/
        return -1;

    canvas_item = GNOME_CANVAS_ITEM (g_obj);
    cal_view = ea_calendar_helpers_get_cal_view_from (canvas_item);
    if (!cal_view)
        return -1;

    cal_view_event = ea_calendar_helpers_get_cal_view_event_from (canvas_item);
    if (!cal_view_event)
        return -1;

    if (E_IS_DAY_VIEW (cal_view)) {
        gint day, event_num, num_before;
        EDayViewEvent *day_view_event;
        EDayView *day_view = E_DAY_VIEW (cal_view);

        /* the long event comes first in the order */
        for (event_num = day_view->long_events->len - 1; event_num >= 0;
             --event_num) {
            day_view_event = &g_array_index (day_view->long_events,
                             EDayViewEvent, event_num);
            if (cal_view_event == (ECalendarViewEvent*)day_view_event)
                return event_num;

        }
        num_before = day_view->long_events->len;

        for (day = 0; day < day_view->days_shown; ++day) {
            for (event_num = day_view->events[day]->len - 1; event_num >= 0;
                 --event_num) {
                day_view_event = &g_array_index (day_view->events[day],
                            EDayViewEvent, event_num);
                if (cal_view_event == (ECalendarViewEvent*)day_view_event)
                    return num_before + event_num;
            }
            num_before += day_view->events[day]->len;
        }
    }
    else if (E_IS_WEEK_VIEW (cal_view)) {
        AtkObject *atk_parent, *atk_child;
        gint index = 0;

        atk_parent = atk_object_get_parent (accessible);
        while ((atk_child = atk_object_ref_accessible_child (atk_parent,
                                     index)) != NULL) {
            if (atk_child == accessible) {
                g_object_unref (atk_child);
                return index;
            }
            g_object_unref (atk_child);
            ++index;
        }
    }
    else {
        g_return_val_if_reached (-1);
    }
    return -1;
}

static AtkStateSet *
ea_cal_view_event_ref_state_set (AtkObject *accessible)
{
        EaCalViewEvent *atk_event = EA_CAL_VIEW_EVENT (accessible);

        g_return_val_if_fail (atk_event->state_set, NULL);

        g_object_ref (atk_event->state_set);

        return atk_event->state_set;
}

/* Atk Component Interface */

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

  iface->get_extents = ea_cal_view_get_extents;
}

static void
ea_cal_view_get_extents (AtkComponent   *component,
                         gint           *x,
                         gint           *y,
                         gint           *width,
                         gint           *height,
                         AtkCoordType   coord_type)
{
    GObject *g_obj;
    GnomeCanvasItem *canvas_item;
    gint x_window, y_window;
    gint scroll_x, scroll_y;
    ECalendarView *cal_view;
    gint item_x, item_y, item_w, item_h;
    GtkWidget *canvas = NULL;

    g_return_if_fail (EA_IS_CAL_VIEW_EVENT (component));

    g_obj = atk_gobject_accessible_get_object (ATK_GOBJECT_ACCESSIBLE(component));
    if (!g_obj)
        /* defunct object*/
        return;
    g_return_if_fail (E_IS_TEXT (g_obj));

    canvas_item = GNOME_CANVAS_ITEM (g_obj);
    cal_view = ea_calendar_helpers_get_cal_view_from (canvas_item);
    if (!cal_view)
        return;

    if (E_IS_DAY_VIEW (cal_view)) {
        gint day, event_num;

        if (!e_day_view_find_event_from_item (E_DAY_VIEW (cal_view),
                              canvas_item,
                              &day, &event_num))
            return;
        if (day == E_DAY_VIEW_LONG_EVENT) {
            gint start_day, end_day;
            if (!e_day_view_get_long_event_position (E_DAY_VIEW (cal_view),
                                 event_num,
                                 &start_day,
                                 &end_day,
                                 &item_x,
                                 &item_y,
                                 &item_w,
                                 &item_h))
                return;
            canvas = E_DAY_VIEW (cal_view)->top_canvas;
        }
        else {
            if (!e_day_view_get_event_position (E_DAY_VIEW (cal_view), day,
                                event_num,
                                &item_x, &item_y,
                                &item_w, &item_h))

                return;
            canvas = E_DAY_VIEW (cal_view)->main_canvas;
        }
    }
    else if (E_IS_WEEK_VIEW (cal_view)) {
        gint event_num, span_num;
        if (!e_week_view_find_event_from_item (E_WEEK_VIEW (cal_view),
                               canvas_item, &event_num,
                               &span_num))
            return;

        if (!e_week_view_get_span_position (E_WEEK_VIEW (cal_view),
                            event_num, span_num,
                            &item_x, &item_y, &item_w))
            return;
        item_h = E_WEEK_VIEW_ICON_HEIGHT;
        canvas = E_WEEK_VIEW (cal_view)->main_canvas;
    }
    else
        return;

    if (!canvas)
        return;

    gdk_window_get_origin (canvas->window,
                   &x_window, &y_window);
    gnome_canvas_get_scroll_offsets (GNOME_CANVAS (canvas), &scroll_x, &scroll_y);

    *x = item_x + x_window - scroll_x;
    *y = item_y + y_window - scroll_y;
    *width = item_w;
    *height = item_h;

    if (coord_type == ATK_XY_WINDOW) {
        GdkWindow *window;
        gint x_toplevel, y_toplevel;

        window = gdk_window_get_toplevel (GTK_WIDGET (cal_view)->window);
        gdk_window_get_origin (window, &x_toplevel, &y_toplevel);

        *x -= x_toplevel;
        *y -= y_toplevel;
    }

#ifdef ACC_DEBUG
    printf ("Event Bounds (%d, %d, %d, %d)\n", *x, *y, *width, *height);
#endif
}

#define CAL_VIEW_EVENT_ACTION_NUM 1

static const char * action_name [CAL_VIEW_EVENT_ACTION_NUM] = {
        N_("Grab Focus")
};

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

        iface->do_action = ea_cal_view_event_do_action;
        iface->get_n_actions = ea_cal_view_event_get_n_actions;
        iface->get_name = ea_cal_view_event_action_get_name;
}

static gboolean
ea_cal_view_event_do_action (AtkAction *action, gint i)
{
        AtkGObjectAccessible *atk_gobj;
        AtkComponent *atk_comp;

        atk_gobj = ATK_GOBJECT_ACCESSIBLE (action);

        if (i == 0) {
                atk_comp = (AtkComponent *)atk_gobj;
                return atk_component_grab_focus (atk_comp);
        }

        return FALSE;

}

static gint
ea_cal_view_event_get_n_actions (AtkAction *action)
{
        return CAL_VIEW_EVENT_ACTION_NUM;
}

static G_CONST_RETURN gchar*
ea_cal_view_event_action_get_name (AtkAction *action, gint i)
{
        if (i >= 0 && i < CAL_VIEW_EVENT_ACTION_NUM)
                return action_name [i];
        return NULL;
}