path: root/modules/calendar/e-cal-shell-view-private.c

/*
 * e-cal-shell-view-private.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/>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include "e-util/e-util-private.h"

#include "e-cal-shell-view-private.h"

#include "calendar/gui/calendar-view-factory.h"
#include "widgets/menus/gal-view-factory-etable.h"

#define CHECK_NB    5

/* be compatible with older e-d-s for MeeGo */
#ifndef ETC_TIMEZONE
#  define ETC_TIMEZONE        "/etc/timezone"
#  define ETC_TIMEZONE_MAJ    "/etc/TIMEZONE"
#  define ETC_RC_CONF         "/etc/rc.conf"
#  define ETC_SYSCONFIG_CLOCK "/etc/sysconfig/clock"
#  define ETC_CONF_D_CLOCK    "/etc/conf.d/clock"
#  define ETC_LOCALTIME       "/etc/localtime"
#endif

static const gchar * files_to_check[CHECK_NB] = {
        ETC_TIMEZONE,
        ETC_TIMEZONE_MAJ,
        ETC_SYSCONFIG_CLOCK,
        ETC_CONF_D_CLOCK,
        ETC_LOCALTIME
};

static struct tm
cal_shell_view_get_current_time (ECalendarItem *calitem,
                                 ECalShellView *cal_shell_view)
{
    ECalShellContent *cal_shell_content;
    struct icaltimetype tt;
    icaltimezone *timezone;
    ECalModel *model;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    model = e_cal_shell_content_get_model (cal_shell_content);
    timezone = e_cal_model_get_timezone (model);

    tt = icaltime_from_timet_with_zone (time (NULL), FALSE, timezone);

    return icaltimetype_to_tm (&tt);
}

static void
cal_shell_view_date_navigator_date_range_changed_cb (ECalShellView *cal_shell_view,
                                                     ECalendarItem *calitem)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    gnome_calendar_update_query (calendar);
}

static void
cal_shell_view_date_navigator_selection_changed_cb (ECalShellView *cal_shell_view,
                                                    ECalendarItem *calitem)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendarViewType switch_to;
    GnomeCalendarViewType view_type;
    GnomeCalendar *calendar;
    ECalModel *model;
    GDate start_date, end_date;
    GDate new_start_date, new_end_date;
    icaltimetype tt;
    icaltimezone *timezone;
    time_t start, end, new_time;
    gboolean starts_on_week_start_day;
    gint new_days_shown, old_days_shown;
    gint week_start_day;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    model = gnome_calendar_get_model (calendar);
    view_type = gnome_calendar_get_view (calendar);
    switch_to = view_type;

    timezone = e_cal_model_get_timezone (model);
    week_start_day = e_cal_model_get_week_start_day (model);
    e_cal_model_get_time_range (model, &start, &end);

    time_to_gdate_with_zone (&start_date, start, timezone);
    time_to_gdate_with_zone (&end_date, end, timezone);

    if (view_type == GNOME_CAL_MONTH_VIEW) {
        EWeekView *week_view;
        ECalendarView *calendar_view;
        gboolean multi_week_view;
        gboolean compress_weekend;

        calendar_view = gnome_calendar_get_calendar_view (
            calendar, GNOME_CAL_MONTH_VIEW);

        week_view = E_WEEK_VIEW (calendar_view);
        multi_week_view = e_week_view_get_multi_week_view (week_view);
        compress_weekend = e_week_view_get_compress_weekend (week_view);

        if (week_start_day == 0 && (!multi_week_view || compress_weekend))
            g_date_add_days (&start_date, 1);
    }

    g_date_subtract_days (&end_date, 1);

    e_calendar_item_get_selection (
        calitem, &new_start_date, &new_end_date);

    /* If the selection hasn't changed, just return. */
    if (g_date_compare (&start_date, &new_start_date) == 0 &&
        g_date_compare (&end_date, &new_end_date) == 0)
        return;

    old_days_shown =
        g_date_get_julian (&end_date) -
        g_date_get_julian (&start_date) + 1;
    new_days_shown =
        g_date_get_julian (&new_end_date) -
        g_date_get_julian (&new_start_date) + 1;

    /* If a complete week is selected we show the week view.
     * Note that if weekends are compressed and the week start
     * day is set to Sunday, we don't actually show complete
     * weeks in the week view, so this may need tweaking. */
    starts_on_week_start_day =
        (g_date_get_weekday (&new_start_date) % 7 == week_start_day);

    /* Update selection to be in the new time range. */
    tt = icaltime_null_time ();
    tt.year = g_date_get_year (&new_start_date);
    tt.month = g_date_get_month (&new_start_date);
    tt.day = g_date_get_day (&new_start_date);
    new_time = icaltime_as_timet_with_zone (tt, timezone);

    /* Switch views as appropriate, and change the number of
     * days or weeks shown. */
    if (view_type == GNOME_CAL_WORK_WEEK_VIEW && old_days_shown == new_days_shown) {
        /* keep the work week view when has same days shown */
        switch_to = GNOME_CAL_WORK_WEEK_VIEW;
    } else if (new_days_shown > 9) {
        if (view_type != GNOME_CAL_LIST_VIEW) {
            ECalendarView *calendar_view;

            calendar_view = gnome_calendar_get_calendar_view (
                calendar, GNOME_CAL_MONTH_VIEW);
            e_week_view_set_weeks_shown (
                E_WEEK_VIEW (calendar_view),
                (new_days_shown + 6) / 7);
            switch_to = GNOME_CAL_MONTH_VIEW;
        }
    } else if (new_days_shown == 7 && starts_on_week_start_day) {
        switch_to = GNOME_CAL_WEEK_VIEW;
    } else if (new_days_shown == 1 && (view_type == GNOME_CAL_WORK_WEEK_VIEW || view_type == GNOME_CAL_WEEK_VIEW)) {
        /* preserve week views when clicking on one day */
        switch_to = view_type;
    } else {
        ECalendarView *calendar_view;

        calendar_view = gnome_calendar_get_calendar_view (
            calendar, GNOME_CAL_DAY_VIEW);
        e_day_view_set_days_shown (
            E_DAY_VIEW (calendar_view), new_days_shown);

        if (new_days_shown != 5 || !starts_on_week_start_day)
            switch_to = GNOME_CAL_DAY_VIEW;

        else if (view_type != GNOME_CAL_WORK_WEEK_VIEW)
            switch_to = GNOME_CAL_DAY_VIEW;
    }

    /* Make the views display things properly. */
    gnome_calendar_update_view_times (calendar, new_time);
    gnome_calendar_set_view (calendar, switch_to);
    gnome_calendar_set_range_selected (calendar, TRUE);

    gnome_calendar_notify_dates_shown_changed (calendar);

    g_signal_handlers_block_by_func (calitem,
        cal_shell_view_date_navigator_selection_changed_cb, cal_shell_view);

    /* make sure the selected days in the calendar matches shown days */
    e_cal_model_get_time_range (model, &start, &end);

    time_to_gdate_with_zone (&start_date, start, timezone);
    time_to_gdate_with_zone (&end_date, end, timezone);

    g_date_subtract_days (&end_date, 1);

    e_calendar_item_set_selection (calitem, &start_date, &end_date);

    g_signal_handlers_unblock_by_func (calitem,
        cal_shell_view_date_navigator_selection_changed_cb, cal_shell_view);
}

static gboolean
cal_shell_view_date_navigator_scroll_event_cb (ECalShellView *cal_shell_view,
                                               GdkEventScroll *event,
                                               ECalendar *date_navigator)
{
    ECalendarItem *calitem;
    GDate start_date, end_date;
    GdkScrollDirection direction;

    calitem = date_navigator->calitem;
    if (!e_calendar_item_get_selection (calitem, &start_date, &end_date))
        return FALSE;

    direction = event->direction;

    #if GTK_CHECK_VERSION(3,3,18)
    if (direction == GDK_SCROLL_SMOOTH) {
        static gdouble total_delta_y = 0.0;

        total_delta_y += event->delta_y;

        if (total_delta_y >= 1.0) {
            total_delta_y = 0.0;
            direction = GDK_SCROLL_DOWN;
        } else if (total_delta_y <= -1.0) {
            total_delta_y = 0.0;
            direction = GDK_SCROLL_UP;
        } else {
            return FALSE;
        }
    }
    #endif

    switch (direction) {
        case GDK_SCROLL_UP:
            g_date_subtract_months (&start_date, 1);
            g_date_subtract_months (&end_date, 1);
            break;

        case GDK_SCROLL_DOWN:
            g_date_add_months (&start_date, 1);
            g_date_add_months (&end_date, 1);
            break;

        default:
            g_return_val_if_reached (FALSE);
    }

    /* XXX Does ECalendarItem emit a signal for this?  If so, maybe
     *     we could move this handler into ECalShellSidebar. */
    e_calendar_item_set_selection (calitem, &start_date, &end_date);

    cal_shell_view_date_navigator_selection_changed_cb (
        cal_shell_view, calitem);

    return TRUE;
}

static void
cal_shell_view_popup_event_cb (EShellView *shell_view,
                               GdkEventButton *event)
{
    GList *list;
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;
    ECalendarView *view;
    ECalShellViewPrivate *priv;
    const gchar *widget_path;
    gint n_selected;

    priv = E_CAL_SHELL_VIEW_GET_PRIVATE (shell_view);

    calendar = e_cal_shell_content_get_calendar (priv->cal_shell_content);

    view_type = gnome_calendar_get_view (calendar);
    view = gnome_calendar_get_calendar_view (calendar, view_type);

    list = e_calendar_view_get_selected_events (view);
    n_selected = g_list_length (list);
    g_list_free (list);

    if (n_selected <= 0)
        widget_path = "/calendar-empty-popup";
    else
        widget_path = "/calendar-event-popup";

    e_shell_view_show_popup_menu (shell_view, widget_path, event);
}

static gboolean
cal_shell_view_selector_popup_event_cb (EShellView *shell_view,
                                        ESource *primary_source,
                                        GdkEventButton *event)
{
    const gchar *widget_path;

    widget_path = "/calendar-popup";
    e_shell_view_show_popup_menu (shell_view, widget_path, event);

    return TRUE;
}

static void
cal_shell_view_selector_client_added_cb (ECalShellView *cal_shell_view,
                                         ECalClient *client)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    ECalModel *model;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    model = gnome_calendar_get_model (calendar);

    e_cal_model_add_client (model, client);

    gnome_calendar_update_query (calendar);
}

static void
cal_shell_view_selector_client_removed_cb (ECalShellView *cal_shell_view,
                                           ECalClient *client)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    ECalModel *model;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    model = gnome_calendar_get_model (calendar);

    e_cal_model_remove_client (model, client);

    gnome_calendar_update_query (calendar);
}

static void
cal_shell_view_memopad_popup_event_cb (EShellView *shell_view,
                                       GdkEventButton *event)
{
    const gchar *widget_path;

    widget_path = "/calendar-memopad-popup";
    e_shell_view_show_popup_menu (shell_view, widget_path, event);
}

static void
cal_shell_view_taskpad_popup_event_cb (EShellView *shell_view,
                                       GdkEventButton *event)
{
    const gchar *widget_path;

    widget_path = "/calendar-taskpad-popup";
    e_shell_view_show_popup_menu (shell_view, widget_path, event);
}

static void
cal_shell_view_user_created_cb (ECalShellView *cal_shell_view,
                                ECalClient *where_was_created,
                                ECalendarView *calendar_view)
{
    ECalShellSidebar *cal_shell_sidebar;
    ESource *source;

    g_return_if_fail (where_was_created != NULL);

    source = e_client_get_source (E_CLIENT (where_was_created));

    cal_shell_sidebar = cal_shell_view->priv->cal_shell_sidebar;
    e_cal_shell_sidebar_add_source (cal_shell_sidebar, source);
}

static void
cal_shell_view_load_view_collection (EShellViewClass *shell_view_class)
{
    GalViewCollection *collection;
    GalViewFactory *factory;
    ETableSpecification *spec;
    const gchar *base_dir;
    gchar *filename;

    collection = shell_view_class->view_collection;

    base_dir = EVOLUTION_ETSPECDIR;
    spec = e_table_specification_new ();
    filename = g_build_filename (base_dir, ETSPEC_FILENAME, NULL);
    if (!e_table_specification_load_from_file (spec, filename))
        g_critical (
            "Unable to load ETable specification file "
            "for calendars");
    g_free (filename);

    factory = calendar_view_factory_new (GNOME_CAL_DAY_VIEW);
    gal_view_collection_add_factory (collection, factory);
    g_object_unref (factory);

    factory = calendar_view_factory_new (GNOME_CAL_WORK_WEEK_VIEW);
    gal_view_collection_add_factory (collection, factory);
    g_object_unref (factory);

    factory = calendar_view_factory_new (GNOME_CAL_WEEK_VIEW);
    gal_view_collection_add_factory (collection, factory);
    g_object_unref (factory);

    factory = calendar_view_factory_new (GNOME_CAL_MONTH_VIEW);
    gal_view_collection_add_factory (collection, factory);
    g_object_unref (factory);

    factory = gal_view_factory_etable_new (spec);
    gal_view_collection_add_factory (collection, factory);
    g_object_unref (factory);
    g_object_unref (spec);

    gal_view_collection_load (collection);
}

static void
cal_shell_view_notify_view_id_cb (ECalShellView *cal_shell_view)
{
    ECalShellContent *cal_shell_content;
    GalViewInstance *view_instance;
    const gchar *view_id;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    view_instance =
        e_cal_shell_content_get_view_instance (cal_shell_content);
    view_id = e_shell_view_get_view_id (E_SHELL_VIEW (cal_shell_view));

    /* A NULL view ID implies we're in a custom view.  But you can
     * only get to a custom view via the "Define Views" dialog, which
     * would have already modified the view instance appropriately.
     * Furthermore, there's no way to refer to a custom view by ID
     * anyway, since custom views have no IDs. */
    if (view_id == NULL)
        return;

    gal_view_instance_set_current_view_id (view_instance, view_id);
}

void
e_cal_shell_view_private_init (ECalShellView *cal_shell_view,
                               EShellViewClass *shell_view_class)
{
    if (!gal_view_collection_loaded (shell_view_class->view_collection))
        cal_shell_view_load_view_collection (shell_view_class);

    g_signal_connect (
        cal_shell_view, "notify::view-id",
        G_CALLBACK (cal_shell_view_notify_view_id_cb), NULL);
}

static void
system_timezone_monitor_changed (GFileMonitor *handle,
                                 GFile *file,
                                 GFile *other_file,
                                 GFileMonitorEvent event,
                                 gpointer user_data)
{
    ECalShellView  *view = E_CAL_SHELL_VIEW (user_data);
    ECalShellViewPrivate *priv = view->priv;
    ECalShellContent *cal_shell_content;
    icaltimezone *timezone = NULL, *current_zone = NULL;
    EShellSettings *settings;
    EShellBackend *shell_backend;
    EShell *shell;
    ECalModel *model;
    const gchar *location;

    if (event != G_FILE_MONITOR_EVENT_CHANGED &&
        event != G_FILE_MONITOR_EVENT_CHANGES_DONE_HINT &&
        event != G_FILE_MONITOR_EVENT_DELETED &&
        event != G_FILE_MONITOR_EVENT_CREATED)
        return;

    cal_shell_content = priv->cal_shell_content;
    model = e_cal_shell_content_get_model (cal_shell_content);
    current_zone = e_cal_model_get_timezone (model);
    timezone = e_cal_util_get_system_timezone ();

    if (!g_strcmp0 (
        icaltimezone_get_tzid (timezone),
        icaltimezone_get_tzid (current_zone)))
        return;

    shell_backend = e_shell_view_get_shell_backend ((EShellView *) view);
    shell = e_shell_backend_get_shell (shell_backend);
    settings = e_shell_get_shell_settings (shell);
    location = icaltimezone_get_location (timezone);
    if (location == NULL)
        location = "UTC";

    g_object_set (settings, "cal-timezone-string", location, NULL);
    g_object_set (settings, "cal-timezone", timezone, NULL);
}

static void
init_timezone_monitors (ECalShellView *view)
{
    ECalShellViewPrivate *priv = view->priv;
    gint i;

    for (i = 0; i < CHECK_NB; i++) {
        GFile *file;

        file = g_file_new_for_path (files_to_check[i]);
        priv->monitors[i] = g_file_monitor_file (
            file, G_FILE_MONITOR_NONE, NULL, NULL);
        g_object_unref (file);

        if (priv->monitors[i])
            g_signal_connect_object (
                priv->monitors[i], "changed",
                G_CALLBACK (system_timezone_monitor_changed),
                view, 0);
    }
}

void
e_cal_shell_view_private_constructed (ECalShellView *cal_shell_view)
{
    ECalShellViewPrivate *priv = cal_shell_view->priv;
    ECalShellContent *cal_shell_content;
    ECalShellSidebar *cal_shell_sidebar;
    EShellBackend *shell_backend;
    EShellContent *shell_content;
    EShellSidebar *shell_sidebar;
    EShellWindow *shell_window;
    EShellView *shell_view;
    GnomeCalendar *calendar;
    ECalendar *date_navigator;
    EMemoTable *memo_table;
    ETaskTable *task_table;
    ESourceSelector *selector;
    GtkWidget *widget;
    ECalModel *model;
    gint ii;

    shell_view = E_SHELL_VIEW (cal_shell_view);
    shell_backend = e_shell_view_get_shell_backend (shell_view);
    shell_content = e_shell_view_get_shell_content (shell_view);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);
    shell_window = e_shell_view_get_shell_window (shell_view);

    e_shell_window_add_action_group (shell_window, "calendar");
    e_shell_window_add_action_group (shell_window, "calendar-filter");

    /* Cache these to avoid lots of awkward casting. */
    priv->cal_shell_backend = g_object_ref (shell_backend);
    priv->cal_shell_content = g_object_ref (shell_content);
    priv->cal_shell_sidebar = g_object_ref (shell_sidebar);

    cal_shell_content = E_CAL_SHELL_CONTENT (shell_content);
    model = e_cal_shell_content_get_model (cal_shell_content);
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    memo_table = e_cal_shell_content_get_memo_table (cal_shell_content);
    task_table = e_cal_shell_content_get_task_table (cal_shell_content);

    cal_shell_sidebar = E_CAL_SHELL_SIDEBAR (shell_sidebar);
    selector = e_cal_shell_sidebar_get_selector (cal_shell_sidebar);
    date_navigator = e_cal_shell_sidebar_get_date_navigator (cal_shell_sidebar);

    /* Give GnomeCalendar a handle to the date navigator, memo and task table. */
    gnome_calendar_set_date_navigator (calendar, date_navigator);
    gnome_calendar_set_memo_table (
        calendar, memo_table ? GTK_WIDGET (memo_table) : NULL);
    gnome_calendar_set_task_table (
        calendar, task_table ? GTK_WIDGET (task_table) : NULL);

    e_calendar_item_set_get_time_callback (
        date_navigator->calitem, (ECalendarItemGetTimeCallback)
        cal_shell_view_get_current_time, cal_shell_view, NULL);

    for (ii = 0; ii < GNOME_CAL_LAST_VIEW; ii++) {
        ECalendarView *calendar_view;

        calendar_view =
            gnome_calendar_get_calendar_view (calendar, ii);

        g_signal_connect_object (
            calendar_view, "popup-event",
            G_CALLBACK (cal_shell_view_popup_event_cb),
            cal_shell_view, G_CONNECT_SWAPPED);

        g_signal_connect_object (
            calendar_view, "selection-changed",
            G_CALLBACK (e_shell_view_update_actions),
            cal_shell_view, G_CONNECT_SWAPPED);

        g_signal_connect_object (
            calendar_view, "user-created",
            G_CALLBACK (cal_shell_view_user_created_cb),
            cal_shell_view, G_CONNECT_SWAPPED);
    }

    g_signal_connect_object (
        calendar, "dates-shown-changed",
        G_CALLBACK (e_cal_shell_view_update_sidebar),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        model, "status-message",
        G_CALLBACK (e_cal_shell_view_set_status_message),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        model, "notify::timezone",
        G_CALLBACK (e_cal_shell_view_update_timezone),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        date_navigator, "scroll-event",
        G_CALLBACK (cal_shell_view_date_navigator_scroll_event_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        date_navigator->calitem, "date-range-changed",
        G_CALLBACK (cal_shell_view_date_navigator_date_range_changed_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        date_navigator->calitem, "selection-changed",
        G_CALLBACK (cal_shell_view_date_navigator_selection_changed_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        selector, "popup-event",
        G_CALLBACK (cal_shell_view_selector_popup_event_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        cal_shell_sidebar, "client-added",
        G_CALLBACK (cal_shell_view_selector_client_added_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    g_signal_connect_object (
        cal_shell_sidebar, "client-removed",
        G_CALLBACK (cal_shell_view_selector_client_removed_cb),
        cal_shell_view, G_CONNECT_SWAPPED);

    if (memo_table)
        g_signal_connect_object (
            memo_table, "popup-event",
            G_CALLBACK (cal_shell_view_memopad_popup_event_cb),
            cal_shell_view, G_CONNECT_SWAPPED);

    if (memo_table)
        g_signal_connect_object (
            memo_table, "selection-change",
            G_CALLBACK (e_cal_shell_view_memopad_actions_update),
            cal_shell_view, G_CONNECT_SWAPPED);

    if (memo_table)
        g_signal_connect_object (
            memo_table, "status-message",
            G_CALLBACK (e_cal_shell_view_memopad_set_status_message),
            cal_shell_view, G_CONNECT_SWAPPED);

    if (task_table)
        g_signal_connect_object (
            task_table, "popup-event",
            G_CALLBACK (cal_shell_view_taskpad_popup_event_cb),
            cal_shell_view, G_CONNECT_SWAPPED);

    if (task_table)
        g_signal_connect_object (
            task_table, "status-message",
            G_CALLBACK (e_cal_shell_view_taskpad_set_status_message),
            cal_shell_view, G_CONNECT_SWAPPED);

    if (task_table)
        g_signal_connect_object (
            task_table, "selection-change",
            G_CALLBACK (e_cal_shell_view_taskpad_actions_update),
            cal_shell_view, G_CONNECT_SWAPPED);

    e_categories_add_change_hook (
        (GHookFunc) e_cal_shell_view_update_search_filter,
        cal_shell_view);

    init_timezone_monitors (cal_shell_view);
    e_cal_shell_view_actions_init (cal_shell_view);
    e_cal_shell_view_update_sidebar (cal_shell_view);
    e_cal_shell_view_update_search_filter (cal_shell_view);
    e_cal_shell_view_update_timezone (cal_shell_view);

    /* Express mode only: Bind the "New Calendar"
     * sidebar button to the appropriate action. */
    widget = e_cal_shell_sidebar_get_new_calendar_button (cal_shell_sidebar);
    if (widget != NULL)
        gtk_activatable_set_related_action (
            GTK_ACTIVATABLE (widget), ACTION (CALENDAR_NEW));

    /* Keep the ECalModel in sync with the sidebar. */
    g_object_bind_property (
        shell_sidebar, "default-client",
        model, "default-client",
        G_BINDING_SYNC_CREATE);

    /* Keep the toolbar view buttons in sync with the calendar. */
    g_object_bind_property (
        calendar, "view",
        ACTION (CALENDAR_VIEW_DAY), "current-value",
        G_BINDING_BIDIRECTIONAL |
        G_BINDING_SYNC_CREATE);

    /* Force the main calendar to update its default source. */
    g_signal_emit_by_name (selector, "primary-selection-changed");
}

void
e_cal_shell_view_private_dispose (ECalShellView *cal_shell_view)
{
    ECalShellViewPrivate *priv = cal_shell_view->priv;
    gint i;

    e_cal_shell_view_search_stop (cal_shell_view);

    /* Calling ECalShellContent's save state from here,
     * because it is too late in its own dispose(). */
    if (priv->cal_shell_content != NULL)
        e_cal_shell_content_save_state (priv->cal_shell_content);

    DISPOSE (priv->cal_shell_backend);
    DISPOSE (priv->cal_shell_content);
    DISPOSE (priv->cal_shell_sidebar);

    if (priv->calendar_activity != NULL) {
        /* XXX Activity is not cancellable. */
        e_activity_set_state (
            priv->calendar_activity, E_ACTIVITY_COMPLETED);
        g_object_unref (priv->calendar_activity);
        priv->calendar_activity = NULL;
    }

    if (priv->memopad_activity != NULL) {
        /* XXX Activity is not cancellable. */
        e_activity_set_state (
            priv->memopad_activity, E_ACTIVITY_COMPLETED);
        g_object_unref (priv->memopad_activity);
        priv->memopad_activity = NULL;
    }

    if (priv->taskpad_activity != NULL) {
        /* XXX Activity is not cancellable. */
        e_activity_set_state (
            priv->taskpad_activity, E_ACTIVITY_COMPLETED);
        g_object_unref (priv->taskpad_activity);
        priv->taskpad_activity = NULL;
    }

    for (i = 0; i < CHECK_NB; i++) {
        g_object_unref (priv->monitors[i]);
        priv->monitors[i] = NULL;
    }
}

void
e_cal_shell_view_private_finalize (ECalShellView *cal_shell_view)
{
    /* XXX Nothing to do? */
}

void
e_cal_shell_view_open_event (ECalShellView *cal_shell_view,
                             ECalModelComponent *comp_data)
{
    EShell *shell;
    EShellView *shell_view;
    EShellWindow *shell_window;
    ESourceRegistry *registry;
    CompEditor *editor;
    CompEditorFlags flags = 0;
    ECalComponent *comp;
    icalcomponent *clone;
    icalproperty *prop;
    const gchar *uid;

    g_return_if_fail (E_IS_CAL_SHELL_VIEW (cal_shell_view));
    g_return_if_fail (E_IS_CAL_MODEL_COMPONENT (comp_data));

    shell_view = E_SHELL_VIEW (cal_shell_view);
    shell_window = e_shell_view_get_shell_window (shell_view);
    shell = e_shell_window_get_shell (shell_window);

    registry = e_shell_get_registry (shell);

    uid = icalcomponent_get_uid (comp_data->icalcomp);
    editor = comp_editor_find_instance (uid);

    if (editor != NULL)
        goto exit;

    comp = e_cal_component_new ();
    clone = icalcomponent_new_clone (comp_data->icalcomp);
    e_cal_component_set_icalcomponent (comp, clone);

    prop = icalcomponent_get_first_property (
        comp_data->icalcomp, ICAL_ATTENDEE_PROPERTY);
    if (prop != NULL)
        flags |= COMP_EDITOR_MEETING;

    if (itip_organizer_is_user (registry, comp, comp_data->client))
        flags |= COMP_EDITOR_USER_ORG;

    if (itip_sentby_is_user (registry, comp, comp_data->client))
        flags |= COMP_EDITOR_USER_ORG;

    if (!e_cal_component_has_attendees (comp))
        flags |= COMP_EDITOR_USER_ORG;

    editor = event_editor_new (comp_data->client, shell, flags);
    comp_editor_edit_comp (editor, comp);

    g_object_unref (comp);

exit:
    gtk_window_present (GTK_WINDOW (editor));
}

void
e_cal_shell_view_set_status_message (ECalShellView *cal_shell_view,
                                     const gchar *status_message,
                                     gdouble percent)
{
    EActivity *activity;
    EShellView *shell_view;
    EShellBackend *shell_backend;

    g_return_if_fail (E_IS_CAL_SHELL_VIEW (cal_shell_view));

    shell_view = E_SHELL_VIEW (cal_shell_view);
    shell_backend = e_shell_view_get_shell_backend (shell_view);

    activity = cal_shell_view->priv->calendar_activity;

    if (status_message == NULL || *status_message == '\0') {
        if (activity != NULL) {
            e_activity_set_state (activity, E_ACTIVITY_COMPLETED);
            g_object_unref (activity);
            activity = NULL;
        }
    } else if (activity == NULL) {
        activity = e_activity_new ();
        e_activity_set_percent (activity, percent);
        e_activity_set_text (activity, status_message);
        e_shell_backend_add_activity (shell_backend, activity);
    } else {
        e_activity_set_percent (activity, percent);
        e_activity_set_text (activity, status_message);
    }

    cal_shell_view->priv->calendar_activity = activity;
}

struct ForeachTzidData
{
    ECalClient *source_client;
    ECalClient *dest_client;
};

static void
add_timezone_to_cal_cb (icalparameter *param,
                        gpointer data)
{
    struct ForeachTzidData *ftd = data;
    icaltimezone *tz = NULL;
    const gchar *tzid;

    g_return_if_fail (ftd != NULL);
    g_return_if_fail (ftd->source_client != NULL);
    g_return_if_fail (ftd->dest_client != NULL);

    tzid = icalparameter_get_tzid (param);
    if (!tzid || !*tzid)
        return;

    if (e_cal_client_get_timezone_sync (ftd->source_client, tzid, &tz, NULL, NULL) && tz)
        e_cal_client_add_timezone_sync (ftd->dest_client, tz, NULL, NULL);
}

void
e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
                                   ECalendarViewEvent *event,
                                   ECalClient *destination_client,
                                   gboolean remove)
{
    icalcomponent *icalcomp;
    icalcomponent *icalcomp_clone;
    icalcomponent *icalcomp_event;
    gboolean success;
    const gchar *uid;

    /* XXX This function should be split up into
     *     smaller, more understandable pieces. */

    g_return_if_fail (E_IS_CAL_SHELL_VIEW (cal_shell_view));
    g_return_if_fail (event != NULL);
    g_return_if_fail (E_IS_CAL_CLIENT (destination_client));

    if (!is_comp_data_valid (event))
        return;

    icalcomp_event = event->comp_data->icalcomp;
    uid = icalcomponent_get_uid (icalcomp_event);

    /* Put the new object into the destination calendar. */

    success = e_cal_client_get_object_sync (
        destination_client, uid, NULL, &icalcomp, NULL, NULL);

    if (success) {
        icalcomponent_free (icalcomp);
        success = e_cal_client_modify_object_sync (
            destination_client, icalcomp_event,
            CALOBJ_MOD_ALL, NULL, NULL);

        /* do not delete the event when it was found in the calendar */
        return;
    } else {
        icalproperty *icalprop;
        gchar *new_uid;
        GError *error = NULL;
        struct ForeachTzidData ftd;

        ftd.source_client = event->comp_data->client;
        ftd.dest_client = destination_client;

        if (e_cal_util_component_is_instance (icalcomp_event)) {
            success = e_cal_client_get_object_sync (
                event->comp_data->client,
                uid, NULL, &icalcomp, NULL, NULL);
            if (success) {
                /* Use master object when working
                 * with a recurring event ... */
                icalcomp_clone = icalcomponent_new_clone (icalcomp);
                icalcomponent_free (icalcomp);
            } else {
                /* ... or remove the recurrence ID ... */
                icalcomp_clone =
                    icalcomponent_new_clone (icalcomp_event);
                if (e_cal_util_component_has_recurrences (icalcomp_clone)) {
                    /* ... for non-detached instances,
                     * to make it a master object. */
                    icalprop = icalcomponent_get_first_property (
                        icalcomp_clone, ICAL_RECURRENCEID_PROPERTY);
                    if (icalprop != NULL)
                        icalcomponent_remove_property (
                            icalcomp_clone, icalprop);
                }
            }
        } else
            icalcomp_clone =
                icalcomponent_new_clone (icalcomp_event);

        icalprop = icalproperty_new_x ("1");
        icalproperty_set_x_name (icalprop, "X-EVOLUTION-MOVE-CALENDAR");
        icalcomponent_add_property (icalcomp_clone, icalprop);

        if (!remove) {
            /* Change the UID to avoid problems with
             * duplicated UIDs. */
            new_uid = e_cal_component_gen_uid ();
            icalcomponent_set_uid (icalcomp_clone, new_uid);
            g_free (new_uid);
        }

        new_uid = NULL;
        icalcomponent_foreach_tzid (
            icalcomp_clone, add_timezone_to_cal_cb, &ftd);
        success = e_cal_client_create_object_sync (
            destination_client, icalcomp_clone,
            &new_uid, NULL, &error);
        if (!success) {
            icalcomponent_free (icalcomp_clone);
            g_warning (
                "%s: Failed to create object: %s",
                G_STRFUNC, error->message);
            g_error_free (error);
            return;
        }

        icalcomponent_free (icalcomp_clone);
        g_free (new_uid);
    }

    if (remove) {
        ECalClient *source_client = event->comp_data->client;

        /* Remove the item from the source calendar. */
        if (e_cal_util_component_is_instance (icalcomp_event) ||
            e_cal_util_component_has_recurrences (icalcomp_event)) {
            icaltimetype icaltime;
            gchar *rid;

            icaltime =
                icalcomponent_get_recurrenceid (icalcomp_event);
            if (!icaltime_is_null_time (icaltime))
                rid = icaltime_as_ical_string_r (icaltime);
            else
                rid = NULL;
            e_cal_client_remove_object_sync (
                source_client, uid, rid,
                CALOBJ_MOD_ALL, NULL, NULL);
            g_free (rid);
        } else
            e_cal_client_remove_object_sync (
                source_client, uid, NULL,
                CALOBJ_MOD_THIS, NULL, NULL);
    }
}

void
e_cal_shell_view_update_sidebar (ECalShellView *cal_shell_view)
{
    EShellView *shell_view;
    EShellSidebar *shell_sidebar;
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;
    ECalendarView *calendar_view;
    ECalModel *model;
    time_t start_time, end_time;
    struct tm start_tm, end_tm;
    struct icaltimetype start_tt, end_tt;
    icaltimezone *timezone;
    gchar buffer[512] = { 0 };
    gchar end_buffer[512] = { 0 };

    g_return_if_fail (E_IS_CAL_SHELL_VIEW (cal_shell_view));

    shell_view = E_SHELL_VIEW (cal_shell_view);
    shell_sidebar = e_shell_view_get_shell_sidebar (shell_view);

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    model = gnome_calendar_get_model (calendar);
    timezone = e_cal_model_get_timezone (model);

    view_type = gnome_calendar_get_view (calendar);
    calendar_view = gnome_calendar_get_calendar_view (calendar, view_type);

    if (!e_calendar_view_get_visible_time_range (
        calendar_view, &start_time, &end_time)) {
        e_shell_sidebar_set_secondary_text (shell_sidebar, "");
        return;
    }

    start_tt = icaltime_from_timet_with_zone (start_time, FALSE, timezone);
    start_tm.tm_year = start_tt.year - 1900;
    start_tm.tm_mon = start_tt.month - 1;
    start_tm.tm_mday = start_tt.day;
    start_tm.tm_hour = start_tt.hour;
    start_tm.tm_min = start_tt.minute;
    start_tm.tm_sec = start_tt.second;
    start_tm.tm_isdst = -1;
    start_tm.tm_wday = time_day_of_week (
        start_tt.day, start_tt.month - 1, start_tt.year);

    /* Subtract one from end_time so we don't get an extra day. */
    end_tt = icaltime_from_timet_with_zone (end_time - 1, FALSE, timezone);
    end_tm.tm_year = end_tt.year - 1900;
    end_tm.tm_mon = end_tt.month - 1;
    end_tm.tm_mday = end_tt.day;
    end_tm.tm_hour = end_tt.hour;
    end_tm.tm_min = end_tt.minute;
    end_tm.tm_sec = end_tt.second;
    end_tm.tm_isdst = -1;
    end_tm.tm_wday = time_day_of_week (
        end_tt.day, end_tt.month - 1, end_tt.year);

    switch (view_type) {
        case GNOME_CAL_DAY_VIEW:
        case GNOME_CAL_WORK_WEEK_VIEW:
        case GNOME_CAL_WEEK_VIEW:
            if (start_tm.tm_year == end_tm.tm_year &&
                start_tm.tm_mon == end_tm.tm_mon &&
                start_tm.tm_mday == end_tm.tm_mday) {
                e_utf8_strftime (
                    buffer, sizeof (buffer),
                    _("%A %d %b %Y"), &start_tm);
            } else if (start_tm.tm_year == end_tm.tm_year) {
                e_utf8_strftime (
                    buffer, sizeof (buffer),
                    _("%a %d %b"), &start_tm);
                e_utf8_strftime (
                    end_buffer, sizeof (end_buffer),
                    _("%a %d %b %Y"), &end_tm);
                strcat (buffer, " - ");
                strcat (buffer, end_buffer);
            } else {
                e_utf8_strftime (
                    buffer, sizeof (buffer),
                    _("%a %d %b %Y"), &start_tm);
                e_utf8_strftime (
                    end_buffer, sizeof (end_buffer),
                    _("%a %d %b %Y"), &end_tm);
                strcat (buffer, " - ");
                strcat (buffer, end_buffer);
            }
            break;

        case GNOME_CAL_MONTH_VIEW:
        case GNOME_CAL_LIST_VIEW:
            if (start_tm.tm_year == end_tm.tm_year) {
                if (start_tm.tm_mon == end_tm.tm_mon) {
                    e_utf8_strftime (
                        buffer,
                        sizeof (buffer),
                        "%d", &start_tm);
                    e_utf8_strftime (
                        end_buffer,
                        sizeof (end_buffer),
                        _("%d %b %Y"), &end_tm);
                    strcat (buffer, " - ");
                    strcat (buffer, end_buffer);
                } else {
                    e_utf8_strftime (
                        buffer,
                        sizeof (buffer),
                        _("%d %b"), &start_tm);
                    e_utf8_strftime (
                        end_buffer,
                        sizeof (end_buffer),
                        _("%d %b %Y"), &end_tm);
                    strcat (buffer, " - ");
                    strcat (buffer, end_buffer);
                }
            } else {
                e_utf8_strftime (
                    buffer, sizeof (buffer),
                    _("%d %b %Y"), &start_tm);
                e_utf8_strftime (
                    end_buffer, sizeof (end_buffer),
                    _("%d %b %Y"), &end_tm);
                strcat (buffer, " - ");
                strcat (buffer, end_buffer);
            }
            break;

        default:
            g_return_if_reached ();
    }

    e_shell_sidebar_set_secondary_text (shell_sidebar, buffer);
}

void
e_cal_shell_view_update_timezone (ECalShellView *cal_shell_view)
{
    ECalShellContent *cal_shell_content;
    ECalShellSidebar *cal_shell_sidebar;
    icaltimezone *timezone;
    ECalModel *model;
    GList *clients, *iter;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    model = e_cal_shell_content_get_model (cal_shell_content);
    timezone = e_cal_model_get_timezone (model);

    cal_shell_sidebar = cal_shell_view->priv->cal_shell_sidebar;
    clients = e_cal_shell_sidebar_get_clients (cal_shell_sidebar);

    for (iter = clients; iter != NULL; iter = iter->next) {
        ECalClient *client = iter->data;

        if (e_client_is_opened (E_CLIENT (client)))
            e_cal_client_set_default_timezone (client, timezone);
    }

    g_list_free (clients);
}

static gint
cal_searching_get_search_range_years (ECalShellView *cal_shell_view)
{
    EShellBackend *backend;
    EShellSettings *shell_settings;
    gint value;

    backend = e_shell_view_get_shell_backend (E_SHELL_VIEW (cal_shell_view));
    shell_settings = e_shell_get_shell_settings (e_shell_backend_get_shell (backend));

    value = e_shell_settings_get_int (shell_settings, "cal-search-range-years");
    if (value <= 0)
        value = 10;

    return value;
}

static gint
cal_time_t_ptr_compare (gconstpointer a,
                        gconstpointer b)
{
    const time_t *ta = a, *tb = b;

    return (ta ? *ta : 0) - (tb ? *tb : 0);
}

static void cal_iterate_searching (ECalShellView *cal_shell_view);

struct GenerateInstancesData {
    ECalClient *client;
    ECalShellView *cal_shell_view;
    GCancellable *cancellable;
};

static void
cal_searching_instances_done_cb (gpointer user_data)
{
    struct GenerateInstancesData *gid = user_data;

    g_return_if_fail (gid != NULL);
    g_return_if_fail (gid->cal_shell_view != NULL);

    if (!g_cancellable_is_cancelled (gid->cancellable)) {
        gid->cal_shell_view->priv->search_pending_count--;
        if (!gid->cal_shell_view->priv->search_pending_count) {
            gid->cal_shell_view->priv->search_hit_cache =
                g_slist_sort (
                    gid->cal_shell_view->priv->search_hit_cache,
                    cal_time_t_ptr_compare);
            cal_iterate_searching (gid->cal_shell_view);
        }
    }

    g_object_unref (gid->cancellable);
    g_free (gid);
}

static gboolean
cal_searching_got_instance_cb (ECalComponent *comp,
                               time_t instance_start,
                               time_t instance_end,
                               gpointer user_data)
{
    struct GenerateInstancesData *gid = user_data;
    ECalShellViewPrivate *priv;
    ECalComponentDateTime dt;
    time_t *value;

    g_return_val_if_fail (gid != NULL, FALSE);

    if (g_cancellable_is_cancelled (gid->cancellable))
        return FALSE;

    g_return_val_if_fail (gid->cal_shell_view != NULL, FALSE);
    g_return_val_if_fail (gid->cal_shell_view->priv != NULL, FALSE);

    e_cal_component_get_dtstart (comp, &dt);

    if (dt.tzid && dt.value) {
        icaltimezone *zone = NULL;
        if (!e_cal_client_get_timezone_sync (gid->client, dt.tzid, &zone, gid->cancellable, NULL)) {
            zone = NULL;
        }

        if (g_cancellable_is_cancelled (gid->cancellable))
            return FALSE;

        if (zone)
            instance_start = icaltime_as_timet_with_zone (*dt.value, zone);
    }

    e_cal_component_free_datetime (&dt);

    priv = gid->cal_shell_view->priv;
    value = g_new (time_t, 1);
    *value = instance_start;
    if (!g_slist_find_custom (priv->search_hit_cache, value, cal_time_t_ptr_compare))
        priv->search_hit_cache = g_slist_append (priv->search_hit_cache, value);
    else
        g_free (value);

    return TRUE;
}

static void
cal_search_get_object_list_cb (GObject *source,
                               GAsyncResult *result,
                               gpointer user_data)
{
    ECalClient *client = E_CAL_CLIENT (source);
    ECalShellView *cal_shell_view = user_data;
    GSList *icalcomps = NULL;
    GError *error = NULL;

    g_return_if_fail (client != NULL);
    g_return_if_fail (result != NULL);
    g_return_if_fail (cal_shell_view != NULL);

    if (!e_cal_client_get_object_list_finish (client, result, &icalcomps, &error) || !icalcomps) {
        if (g_error_matches (error, E_CLIENT_ERROR, E_CLIENT_ERROR_CANCELLED) ||
            g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
            g_clear_error (&error);
            return;
        }

        g_clear_error (&error);
        cal_shell_view->priv->search_pending_count--;
        if (!cal_shell_view->priv->search_pending_count) {
            cal_shell_view->priv->search_hit_cache =
                g_slist_sort (
                    cal_shell_view->priv->search_hit_cache,
                    cal_time_t_ptr_compare);
            cal_iterate_searching (cal_shell_view);
        }
    } else {
        GSList *iter;
        GCancellable *cancellable;
        time_t start, end;

        cancellable = e_activity_get_cancellable (
            cal_shell_view->priv->searching_activity);
        start = time_add_day (
            cal_shell_view->priv->search_time,
            (-1) * cal_shell_view->priv->search_direction);
        end = cal_shell_view->priv->search_time;
        if (start > end) {
            time_t tmp = start;
            start = end;
            end = tmp;
        }

        for (iter = icalcomps; iter; iter = iter->next) {
            icalcomponent *icalcomp = iter->data;
            struct GenerateInstancesData *gid;

            gid = g_new0 (struct GenerateInstancesData, 1);
            gid->client = client;
            gid->cal_shell_view = cal_shell_view;
            gid->cancellable = g_object_ref (cancellable);

            e_cal_client_generate_instances_for_object (
                client, icalcomp, start, end, cancellable,
                cal_searching_got_instance_cb, gid,
                cal_searching_instances_done_cb);
        }

        e_cal_client_free_icalcomp_slist (icalcomps);
    }
}

static gboolean
cal_searching_check_candidates (ECalShellView *cal_shell_view)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendarViewType view_type;
    ECalendarView *calendar_view;
    GnomeCalendar *calendar;
    GSList *iter;
    time_t value, candidate = -1;

    g_return_val_if_fail (cal_shell_view != NULL, FALSE);
    g_return_val_if_fail (cal_shell_view->priv != NULL, FALSE);

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    view_type = gnome_calendar_get_view (calendar);
    calendar_view = gnome_calendar_get_calendar_view (calendar, view_type);

    if (!e_calendar_view_get_selected_time_range (calendar_view, &value, NULL))
        return FALSE;

    if (cal_shell_view->priv->search_direction > 0 && (view_type == GNOME_CAL_WEEK_VIEW || view_type == GNOME_CAL_MONTH_VIEW))
        value = time_add_day (value, 1);

    for (iter = cal_shell_view->priv->search_hit_cache; iter; iter = iter->next) {
        time_t cache = *((time_t *) iter->data);

        /* list is sorted, once the search iteration is complete */
        if (cache > value) {
            if (cal_shell_view->priv->search_direction > 0)
                candidate = cache;
            break;
        } else if (cal_shell_view->priv->search_direction < 0 && cache != value)
            candidate = cache;
    }

    if (candidate > 0) {
        gnome_calendar_goto (calendar, candidate);
        return TRUE;
    }

    return FALSE;
}

static void
cal_searching_update_alert (ECalShellView *cal_shell_view,
                            const gchar *message)
{
    ECalShellViewPrivate *priv;
    EShellContent *shell_content;
    EAlert *alert;

    g_return_if_fail (cal_shell_view != NULL);
    g_return_if_fail (cal_shell_view->priv != NULL);

    priv = cal_shell_view->priv;

    if (priv->search_alert) {
        e_alert_response (
            priv->search_alert,
            e_alert_get_default_response (priv->search_alert));
        priv->search_alert = NULL;
    }

    if (!message)
        return;

    alert = e_alert_new ("calendar:search-error-generic", message, NULL);
    g_return_if_fail (alert != NULL);

    priv->search_alert = alert;
    g_object_add_weak_pointer (G_OBJECT (alert), &priv->search_alert);
    e_alert_start_timer (priv->search_alert, 5);

    shell_content = e_shell_view_get_shell_content (
        E_SHELL_VIEW (cal_shell_view));
    e_alert_sink_submit_alert (
        E_ALERT_SINK (shell_content), priv->search_alert);
    g_object_unref (priv->search_alert);
}

static void
cal_iterate_searching (ECalShellView *cal_shell_view)
{
    ECalShellViewPrivate *priv;
    GList *clients, *iter;
    ECalModel *model;
    time_t new_time, range1, range2;
    icaltimezone *timezone;
    const gchar *default_tzloc = NULL;
    GCancellable *cancellable;
    gchar *sexp, *start, *end;

    g_return_if_fail (cal_shell_view != NULL);
    g_return_if_fail (cal_shell_view->priv != NULL);

    priv = cal_shell_view->priv;
    g_return_if_fail (priv->search_direction != 0);
    g_return_if_fail (priv->search_pending_count == 0);

    cal_searching_update_alert (cal_shell_view, NULL);

    if (cal_searching_check_candidates (cal_shell_view)) {
        if (priv->searching_activity) {
            e_activity_set_state (
                priv->searching_activity,
                E_ACTIVITY_COMPLETED);
            g_object_unref (priv->searching_activity);
            priv->searching_activity = NULL;
        }

        return;
    }

    if (!priv->searching_activity) {
        EShellBackend *shell_backend;

        shell_backend = e_shell_view_get_shell_backend (
            E_SHELL_VIEW (cal_shell_view));

        cancellable = g_cancellable_new ();
        priv->searching_activity = e_activity_new ();
        e_activity_set_cancellable (
            priv->searching_activity, cancellable);
        e_activity_set_state (
            priv->searching_activity, E_ACTIVITY_RUNNING);
        e_activity_set_text (
            priv->searching_activity,
            priv->search_direction > 0 ?
            _("Searching next matching event") :
            _("Searching previous matching event"));

        e_shell_backend_add_activity (
            shell_backend, priv->searching_activity);
    }

    new_time = time_add_day (priv->search_time, priv->search_direction);
    if (new_time > priv->search_max_time || new_time < priv->search_min_time) {
        gchar *alert_msg;
        gint range_years;

        /* would get out of bounds, stop searching */
        e_activity_set_state (
            priv->searching_activity, E_ACTIVITY_COMPLETED);
        g_object_unref (priv->searching_activity);
        priv->searching_activity = NULL;

        range_years = cal_searching_get_search_range_years (cal_shell_view);
        alert_msg = g_strdup_printf (
            priv->search_direction > 0 ?
            ngettext (
            "Cannot find matching event in the next %d year",
            "Cannot find matching event in the next %d years",
            range_years) :
            ngettext (
            "Cannot find matching event in the previous %d year",
            "Cannot find matching event in the previous %d years",
            range_years),
            range_years);
        cal_searching_update_alert (cal_shell_view, alert_msg);
        g_free (alert_msg);

        e_shell_view_update_actions (E_SHELL_VIEW (cal_shell_view));

        return;
    }

    model = gnome_calendar_get_model (
        e_cal_shell_content_get_calendar (
        cal_shell_view->priv->cal_shell_content));
    clients = e_cal_model_get_client_list (model);

    if (!clients) {
        e_activity_set_state (
            priv->searching_activity, E_ACTIVITY_COMPLETED);
        g_object_unref (priv->searching_activity);
        priv->searching_activity = NULL;

        cal_searching_update_alert (
            cal_shell_view,
            _("Cannot search with no active calendar"));

        e_shell_view_update_actions (E_SHELL_VIEW (cal_shell_view));

        return;
    }

    timezone = e_cal_model_get_timezone (model);
    range1 = priv->search_time;
    range2 = time_add_day (range1, priv->search_direction);
    if (range1 < range2) {
        start = isodate_from_time_t (time_day_begin (range1));
        end = isodate_from_time_t (time_day_end (range2));
    } else {
        start = isodate_from_time_t (time_day_begin (range2));
        end = isodate_from_time_t (time_day_end (range1));
    }

    if (timezone && timezone != icaltimezone_get_utc_timezone ())
        default_tzloc = icaltimezone_get_location (timezone);
    if (!default_tzloc)
        default_tzloc = "";

    sexp = g_strdup_printf (
        "(and %s (occur-in-time-range? "
        "(make-time \"%s\") "
        "(make-time \"%s\") \"%s\"))",
        e_cal_model_get_search_query (model), start, end, default_tzloc);

    g_free (start);
    g_free (end);

    cancellable = e_activity_get_cancellable (priv->searching_activity);
    g_list_foreach (clients, (GFunc) g_object_ref, NULL);
    priv->search_pending_count = g_list_length (clients);
    priv->search_time = new_time;

    for (iter = clients; iter; iter = iter->next) {
        ECalClient *client = iter->data;

        e_cal_client_get_object_list (
            client, sexp, cancellable,
            cal_search_get_object_list_cb, cal_shell_view);
    }

    g_list_free_full (clients, g_object_unref);
    g_free (sexp);
}

void
e_cal_shell_view_search_events (ECalShellView *cal_shell_view,
                                gboolean search_forward)
{
    ECalShellViewPrivate *priv = cal_shell_view->priv;
    ECalShellContent *cal_shell_content;
    GnomeCalendarViewType view_type;
    ECalendarView *calendar_view;
    GnomeCalendar *calendar;
    time_t start_time = 0;
    gint range_years;

    if (priv->searching_activity || !priv->search_direction)
        e_cal_shell_view_search_stop (cal_shell_view);

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);
    view_type = gnome_calendar_get_view (calendar);
    calendar_view = gnome_calendar_get_calendar_view (calendar, view_type);

    if (!e_calendar_view_get_selected_time_range (calendar_view, &start_time, NULL)) {
        e_shell_view_update_actions (E_SHELL_VIEW (cal_shell_view));
        return;
    }

    start_time = time_day_begin (start_time);
    if (priv->search_direction) {
        time_t cached_start, cached_end, tmp;

        cached_start = priv->search_time;
        cached_end = time_add_day (
            cached_start, (-1) * priv->search_direction);

        if (priv->search_direction > 0) {
            tmp = cached_start;
            cached_start = cached_end;
            cached_end = tmp;
        }

        /* clear cached results if searching out of cached bounds */
        if (start_time < cached_start || start_time > cached_end)
            e_cal_shell_view_search_stop (cal_shell_view);
    }

    priv->search_direction = search_forward ? +30 : -30;

    if (cal_searching_check_candidates (cal_shell_view))
        return;

    range_years = cal_searching_get_search_range_years (cal_shell_view);

    priv->search_pending_count = 0;
    priv->search_time = start_time;
    priv->search_min_time = start_time - (range_years * 365 * 24 * 60 * 60);
    priv->search_max_time = start_time + (range_years * 365 * 24 * 60 * 60);

    if (priv->search_min_time < 0)
        priv->search_min_time = 0;
    if (priv->search_hit_cache) {
        g_slist_free_full (priv->search_hit_cache, g_free);
        priv->search_hit_cache = NULL;
    }

    cal_iterate_searching (cal_shell_view);
}

void
e_cal_shell_view_search_stop (ECalShellView *cal_shell_view)
{
    ECalShellViewPrivate *priv;

    g_return_if_fail (cal_shell_view != NULL);
    g_return_if_fail (cal_shell_view->priv != NULL);

    priv = cal_shell_view->priv;

    cal_searching_update_alert (cal_shell_view, NULL);

    if (priv->searching_activity) {
        g_cancellable_cancel (
            e_activity_get_cancellable (priv->searching_activity));
        e_activity_set_state (
            priv->searching_activity, E_ACTIVITY_CANCELLED);
        g_object_unref (priv->searching_activity);
        priv->searching_activity = NULL;
    }

    if (priv->search_hit_cache) {
        g_slist_free_full (priv->search_hit_cache, g_free);
        priv->search_hit_cache = NULL;
    }

    priv->search_direction = 0;
}