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)
 *
 */

#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"

static void
cal_shell_view_process_completed_tasks (ECalShellView *cal_shell_view,
                                        gboolean config_changed)
{
#if 0
    ECalShellContent *cal_shell_content;
    ECalendarTable *task_table;

    cal_shell_content = cal_shell_view->priv->cal_shell_content;
    task_table = e_cal_shell_content_get_task_table (cal_shell_content);

    e_calendar_table_process_completed_tasks (
        task_table, clients, config_changed);
#endif
}

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;
    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;

    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 (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 {
        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);
}

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

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

    switch (event->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_if_reached ();
    }

    /* 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);
}

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,
                                         ECal *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,
                                           ECal *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,
                                ECalendarView *calendar_view)
{
    ECalShellSidebar *cal_shell_sidebar;
    ECalModel *model;
    ECal *client;
    ESource *source;

    model = e_calendar_view_get_model (calendar_view);
    client = e_cal_model_get_default_client (model);
    source = e_cal_get_source (client);

    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);
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    if (task_table)
        g_signal_connect_swapped (
            task_table, "status-message",
            G_CALLBACK (e_cal_shell_view_taskpad_set_status_message),
            cal_shell_view);
    
    if (task_table)
        g_signal_connect_swapped (
            task_table, "selection-change",
            G_CALLBACK (e_cal_shell_view_taskpad_actions_update),
            cal_shell_view);

    e_categories_add_change_hook (
        (GHookFunc) e_cal_shell_view_update_search_filter,
        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);

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

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

    /* 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;

    /* Calling calendar's save state from here, because it is too late in its dispose */
    if (priv->cal_shell_content)
        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_complete (priv->calendar_activity);
        g_object_unref (priv->calendar_activity);
        priv->calendar_activity = NULL;
    }

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

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

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

    if (itip_sentby_is_user (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_complete (activity);
            g_object_unref (activity);
            activity = NULL;
        }
    } else if (activity == NULL) {
        activity = e_activity_new (status_message);
        e_activity_set_percent (activity, percent);
        e_shell_backend_add_activity (shell_backend, activity);
    } else {
        e_activity_set_percent (activity, percent);
        e_activity_set_primary_text (activity, status_message);
    }

    cal_shell_view->priv->calendar_activity = activity;
}

void
e_cal_shell_view_transfer_item_to (ECalShellView *cal_shell_view,
                                   ECalendarViewEvent *event,
                                   ECal *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 (destination_client));

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

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

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

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

        /* do not delete the event when it was found in the calendar */
        return;
    } else {
        icalproperty *icalprop;
        gchar *new_uid;

        if (e_cal_util_component_is_instance (icalcomp_event)) {
            success = e_cal_get_object (
                event->comp_data->client,
                uid, NULL, &icalcomp, 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;
        success = e_cal_create_object (
            destination_client, icalcomp_clone, &new_uid, NULL);
        if (!success) {
            icalcomponent_free (icalcomp_clone);
            return;
        }

        icalcomponent_free (icalcomp_clone);
        g_free (new_uid);
    }

    if (remove) {
        ECal *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_remove_object_with_mod (
                source_client, uid, rid, CALOBJ_MOD_ALL, NULL);
            g_free (rid);
        } else
            e_cal_remove_object (source_client, uid, 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) {
        ECal *client = iter->data;

        if (e_cal_get_load_state (client) == E_CAL_LOAD_LOADED)
            e_cal_set_default_timezone (client, timezone, NULL);
    }

    g_list_free (clients);
}