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

/*
 * e-cal-shell-content.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-cal-shell-content.h"

#include <string.h>
#include <glib/gi18n.h>

#include "calendar/gui/calendar-config.h"
#include "calendar/gui/calendar-view.h"
#include "calendar/gui/e-cal-list-view.h"
#include "calendar/gui/e-cal-model-calendar.h"
#include "calendar/gui/e-calendar-view.h"
#include "calendar/gui/e-day-view.h"
#include "calendar/gui/e-week-view.h"

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

#define E_CAL_SHELL_CONTENT_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_CAL_SHELL_CONTENT, ECalShellContentPrivate))

struct _ECalShellContentPrivate {
    GtkWidget *hpaned;
    GtkWidget *notebook;
    GtkWidget *vpaned;

    GtkWidget *calendar;
    GtkWidget *task_table;
    GtkWidget *memo_table;
};

enum {
    PROP_0,
    PROP_CALENDAR,
    PROP_MEMO_TABLE,
    PROP_TASK_TABLE
};

/* Used to indicate who has the focus within the calendar view. */
typedef enum {
    FOCUS_CALENDAR,
    FOCUS_MEMO_TABLE,
    FOCUS_TASK_TABLE,
    FOCUS_OTHER
} FocusLocation;

G_DEFINE_DYNAMIC_TYPE (
    ECalShellContent,
    e_cal_shell_content,
    E_TYPE_SHELL_CONTENT)

static void
cal_shell_content_display_view_cb (ECalShellContent *cal_shell_content,
                                   GalView *gal_view)
{
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;
    GType gal_view_type;

    gal_view_type = G_OBJECT_TYPE (gal_view);
    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    if (gal_view_type == GAL_TYPE_VIEW_ETABLE) {
        ECalendarView *calendar_view;

        view_type = GNOME_CAL_LIST_VIEW;
        calendar_view = gnome_calendar_get_calendar_view (
            calendar, view_type);
        gal_view_etable_attach_table (
            GAL_VIEW_ETABLE (gal_view),
            E_CAL_LIST_VIEW (calendar_view)->table);

    } else if (gal_view_type == GAL_TYPE_VIEW_CALENDAR_DAY) {
        view_type = GNOME_CAL_DAY_VIEW;

    } else if (gal_view_type == GAL_TYPE_VIEW_CALENDAR_WORK_WEEK) {
        view_type = GNOME_CAL_WORK_WEEK_VIEW;

    } else if (gal_view_type == GAL_TYPE_VIEW_CALENDAR_WEEK) {
        view_type = GNOME_CAL_WEEK_VIEW;

    } else if (gal_view_type == GAL_TYPE_VIEW_CALENDAR_MONTH) {
        view_type = GNOME_CAL_MONTH_VIEW;

    } else {
        g_return_if_reached ();
    }

    gnome_calendar_display_view (calendar, view_type);
}

static void
cal_shell_content_notify_view_id_cb (ECalShellContent *cal_shell_content)
{
    EShellContent *shell_content;
    EShellView *shell_view;
    GSettings *settings;
    GtkWidget *paned;
    const gchar *key;
    const gchar *view_id;

    settings = g_settings_new ("org.gnome.evolution.calendar");
    paned = cal_shell_content->priv->hpaned;

    shell_content = E_SHELL_CONTENT (cal_shell_content);
    shell_view = e_shell_content_get_shell_view (shell_content);
    view_id = e_shell_view_get_view_id (shell_view);

    if (view_id != NULL && strcmp (view_id, "Month_View") == 0)
        key = "month-hpane-position";
    else
        key = "hpane-position";

    g_settings_unbind (paned, "hposition");

    g_settings_bind (
        settings, key,
        paned, "hposition",
        G_SETTINGS_BIND_DEFAULT);

    g_object_unref (settings);
}

static gchar *
cal_shell_content_get_pad_state_filename (EShellContent *shell_content,
                                          ETable *table)
{
    EShellBackend *shell_backend;
    EShellView *shell_view;
    const gchar *config_dir, *nick = NULL;

    g_return_val_if_fail (shell_content != NULL, NULL);
    g_return_val_if_fail (E_IS_SHELL_CONTENT (shell_content), NULL);
    g_return_val_if_fail (table != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE (table), NULL);

    if (E_IS_TASK_TABLE (table))
        nick = "TaskPad";
    else if (E_IS_MEMO_TABLE (table))
        nick = "MemoPad";

    g_return_val_if_fail (nick != NULL, NULL);

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_backend = e_shell_view_get_shell_backend (shell_view);
    config_dir = e_shell_backend_get_config_dir (shell_backend);

    return g_build_filename (config_dir, nick, NULL);
}

static void
cal_shell_content_save_table_state (EShellContent *shell_content,
                                    ETable *table)
{
    gchar *filename;

    filename = cal_shell_content_get_pad_state_filename (
        shell_content, table);
    g_return_if_fail (filename != NULL);

    e_table_save_state (table, filename);
    g_free (filename);
}

static void
cal_shell_content_load_table_state (EShellContent *shell_content,
                                    ETable *table)
{
    gchar *filename;

    filename = cal_shell_content_get_pad_state_filename (
        shell_content, table);
    g_return_if_fail (filename != NULL);

    e_table_load_state (table, filename);
    g_free (filename);
}

void
e_cal_shell_content_save_state (ECalShellContent *cal_shell_content)
{
    ECalShellContentPrivate *priv;

    g_return_if_fail (cal_shell_content != NULL);
    g_return_if_fail (E_IS_CAL_SHELL_CONTENT (cal_shell_content));

    priv = cal_shell_content->priv;

    if (priv->task_table != NULL)
        cal_shell_content_save_table_state (
            E_SHELL_CONTENT (cal_shell_content),
            E_TABLE (priv->task_table));

    if (priv->memo_table != NULL)
        cal_shell_content_save_table_state (
            E_SHELL_CONTENT (cal_shell_content),
            E_TABLE (priv->memo_table));
}

static void
cal_shell_content_set_property (GObject *object,
                                guint property_id,
                                const GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_shell_content_get_property (GObject *object,
                                guint property_id,
                                GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_CALENDAR:
            g_value_set_object (
                value, e_cal_shell_content_get_calendar (
                E_CAL_SHELL_CONTENT (object)));
            return;

        case PROP_MEMO_TABLE:
            g_value_set_object (
                value, e_cal_shell_content_get_memo_table (
                E_CAL_SHELL_CONTENT (object)));
            return;

        case PROP_TASK_TABLE:
            g_value_set_object (
                value, e_cal_shell_content_get_task_table (
                E_CAL_SHELL_CONTENT (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
cal_shell_content_dispose (GObject *object)
{
    ECalShellContentPrivate *priv;

    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (object);

    if (priv->hpaned != NULL) {
        g_object_unref (priv->hpaned);
        priv->hpaned = NULL;
    }

    if (priv->notebook != NULL) {
        g_object_unref (priv->notebook);
        priv->notebook = NULL;
    }

    if (priv->vpaned != NULL) {
        g_object_unref (priv->vpaned);
        priv->vpaned = NULL;
    }

    if (priv->calendar != NULL) {
        g_object_unref (priv->calendar);
        priv->calendar = NULL;
    }

    if (priv->task_table != NULL) {
        g_object_unref (priv->task_table);
        priv->task_table = NULL;
    }

    if (priv->memo_table != NULL) {
        g_object_unref (priv->memo_table);
        priv->memo_table = NULL;
    }

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (e_cal_shell_content_parent_class)->dispose (object);
}

static time_t
gc_get_default_time (ECalModel *model,
                     gpointer user_data)
{
    GnomeCalendar *gcal = user_data;
    time_t res = 0, end;

    g_return_val_if_fail (model != NULL, 0);
    g_return_val_if_fail (GNOME_IS_CALENDAR (user_data), 0);

    gnome_calendar_get_current_time_range (gcal, &res, &end);

    return res;
}

static void
cal_shell_content_is_editing_changed_cb (gpointer cal_view_tasks_memos_table,
                                         GParamSpec *param,
                                         EShellView *shell_view)
{
    g_return_if_fail (E_IS_SHELL_VIEW (shell_view));

    e_shell_view_update_actions (shell_view);
}

static void
cal_shell_content_constructed (GObject *object)
{
    ECalShellContentPrivate *priv;
    ECalendarView *calendar_view;
    ECalModel *memo_model = NULL;
    ECalModel *task_model = NULL;
    EShell *shell;
    EShellContent *shell_content;
    EShellView *shell_view;
    EShellWindow *shell_window;
    EShellContent *foreign_content;
    EShellView *foreign_view;
    GnomeCalendar *calendar;
    ESourceRegistry *registry;
    GalViewInstance *view_instance;
    GSettings *settings;
    GtkWidget *container;
    GtkWidget *widget;
    gchar *markup;
    gint ii;

    priv = E_CAL_SHELL_CONTENT_GET_PRIVATE (object);

    /* Chain up to parent's constructed() method. */
    G_OBJECT_CLASS (e_cal_shell_content_parent_class)->constructed (object);

    shell_content = E_SHELL_CONTENT (object);
    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_window = e_shell_view_get_shell_window (shell_view);

    shell = e_shell_window_get_shell (shell_window);

    /* We borrow the memopad and taskpad models from the memo
     * and task views, loading the views if necessary. */
    foreign_view = e_shell_window_get_shell_view (shell_window, "memos");
    foreign_content = e_shell_view_get_shell_content (foreign_view);
    g_object_get (foreign_content, "model", &memo_model, NULL);

    foreign_view = e_shell_window_get_shell_view (shell_window, "tasks");
    foreign_content = e_shell_view_get_shell_content (foreign_view);
    g_object_get (foreign_content, "model", &task_model, NULL);

    /* Build content widgets. */

    container = GTK_WIDGET (object);

    widget = e_paned_new (GTK_ORIENTATION_HORIZONTAL);
    gtk_container_add (GTK_CONTAINER (container), widget);
    priv->hpaned = g_object_ref (widget);
    gtk_widget_show (widget);

    container = priv->hpaned;

    widget = gtk_notebook_new ();
    gtk_notebook_set_show_tabs (GTK_NOTEBOOK (widget), FALSE);
    gtk_notebook_set_show_border (GTK_NOTEBOOK (widget), FALSE);
    gtk_paned_pack1 (GTK_PANED (container), widget, TRUE, FALSE);
    priv->notebook = g_object_ref (widget);
    gtk_widget_show (widget);

    /* FIXME Need to deal with saving and restoring the position.
     *       Month view has its own position. */
    widget = e_paned_new (GTK_ORIENTATION_VERTICAL);
    e_paned_set_fixed_resize (E_PANED (widget), FALSE);
    gtk_paned_pack2 (GTK_PANED (container), widget, FALSE, TRUE);
    priv->vpaned = g_object_ref (widget);
    gtk_widget_show (widget);

    container = priv->notebook;

    /* Add views in the order defined by GnomeCalendarViewType, such
     * that the notebook page number corresponds to the view type. */

    registry = e_shell_get_registry (shell);
    priv->calendar = gnome_calendar_new (registry);
    calendar = GNOME_CALENDAR (priv->calendar);

    for (ii = 0; ii < GNOME_CAL_LAST_VIEW; ii++) {
        calendar_view = gnome_calendar_get_calendar_view (calendar, ii);

        g_signal_connect (
            calendar_view, "notify::is-editing",
            G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);

        gtk_notebook_append_page (
            GTK_NOTEBOOK (container),
            GTK_WIDGET (calendar_view), NULL);
        gtk_widget_show (GTK_WIDGET (calendar_view));
    }

    g_object_bind_property (
        priv->calendar, "view",
        priv->notebook, "page",
        G_BINDING_SYNC_CREATE);

    container = priv->vpaned;

    widget = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
    gtk_paned_pack1 (GTK_PANED (container), widget, TRUE, TRUE);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
    gtk_widget_show (widget);

    widget = gtk_label_new (NULL);
    markup = g_strdup_printf ("<b>%s</b>", _("Tasks"));
    gtk_label_set_markup (GTK_LABEL (widget), markup);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
    gtk_widget_show (widget);
    g_free (markup);

    widget = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (
        GTK_SCROLLED_WINDOW (widget),
        GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (
        GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    widget = e_task_table_new (shell_view, task_model);
    gtk_container_add (GTK_CONTAINER (container), widget);
    priv->task_table = g_object_ref (widget);
    gtk_widget_show (widget);

    cal_shell_content_load_table_state (
        shell_content, E_TABLE (widget));

    g_signal_connect_swapped (
        widget, "open-component",
        G_CALLBACK (e_cal_shell_view_taskpad_open_task),
        shell_view);

    g_signal_connect (
        widget, "notify::is-editing",
        G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);

    container = priv->vpaned;

    widget = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
    gtk_paned_pack2 (GTK_PANED (container), widget, TRUE, TRUE);
    gtk_widget_show (widget);

    container = widget;

    widget = gtk_label_new (NULL);
    markup = g_strdup_printf ("<b>%s</b>", _("Memos"));
    gtk_label_set_markup (GTK_LABEL (widget), markup);
    gtk_box_pack_start (GTK_BOX (container), widget, FALSE, TRUE, 0);
    gtk_widget_show (widget);
    g_free (markup);

    widget = gtk_scrolled_window_new (NULL, NULL);
    gtk_scrolled_window_set_policy (
        GTK_SCROLLED_WINDOW (widget),
        GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (
        GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN);
    gtk_box_pack_start (GTK_BOX (container), widget, TRUE, TRUE, 0);
    gtk_widget_show (widget);

    container = widget;

    widget = e_memo_table_new (shell_view, memo_model);
    gtk_container_add (GTK_CONTAINER (container), widget);
    priv->memo_table = g_object_ref (widget);
    gtk_widget_show (widget);

    cal_shell_content_load_table_state (
        shell_content, E_TABLE (widget));

    e_cal_model_set_default_time_func (
        memo_model, gc_get_default_time, calendar);

    g_signal_connect_swapped (
        widget, "open-component",
        G_CALLBACK (e_cal_shell_view_memopad_open_memo),
        shell_view);

    g_signal_connect (
        widget, "notify::is-editing",
        G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);

    /* Load the view instance. */

    view_instance = e_shell_view_new_view_instance (shell_view, NULL);
    g_signal_connect_swapped (
        view_instance, "display-view",
        G_CALLBACK (cal_shell_content_display_view_cb),
        object);
    /* XXX Actually, don't load the view instance just yet.
     *     The GtkWidget::map() callback below explains why. */
    e_shell_view_set_view_instance (shell_view, view_instance);
    g_object_unref (view_instance);

    g_signal_connect_swapped (
        shell_view, "notify::view-id",
        G_CALLBACK (cal_shell_content_notify_view_id_cb),
        object);

    settings = g_settings_new ("org.gnome.evolution.calendar");

    g_settings_bind (
        settings, "tag-vpane-position",
        priv->vpaned, "proportion",
        G_SETTINGS_BIND_DEFAULT);

    g_object_unref (settings);

    if (memo_model)
        g_object_unref (memo_model);
    if (task_model)
        g_object_unref (task_model);
}

static void
cal_shell_content_map (GtkWidget *widget)
{
    EShellView *shell_view;
    EShellContent *shell_content;
    GalViewInstance *view_instance;

    shell_content = E_SHELL_CONTENT (widget);
    shell_view = e_shell_content_get_shell_view (shell_content);
    view_instance = e_shell_view_get_view_instance (shell_view);

    /* XXX Delay loading the GalViewInstance until after ECalShellView
     *     has a chance to install the sidebar's date navigator into
     *     GnomeCalendar, since loading the GalViewInstance triggers a
     *     callback in GnomeCalendar that requires the date navigator.
     *     Ordinarily we would do this at the end of constructed(), but
     *     that's too soon in this case.  (This feels kind of kludgy.) */
    gal_view_instance_load (view_instance);

    /* Chain up to parent's map() method. */
    GTK_WIDGET_CLASS (e_cal_shell_content_parent_class)->map (widget);
}

/* Helper for cal_shell_content_check_state() */
static icalproperty *
cal_shell_content_get_attendee_prop (icalcomponent *icalcomp,
                                     const gchar *address)
{
    icalproperty *prop;

    if (address == NULL || *address == '\0')
        return NULL;

    prop = icalcomponent_get_first_property (
        icalcomp, ICAL_ATTENDEE_PROPERTY);

    while (prop != NULL) {
        const gchar *attendee;

        attendee = icalproperty_get_attendee (prop);

        if (g_str_equal (itip_strip_mailto (attendee), address))
            return prop;

        prop = icalcomponent_get_next_property (
            icalcomp, ICAL_ATTENDEE_PROPERTY);
    }

    return NULL;
}

/* Helper for cal_shell_content_check_state() */
static gboolean
cal_shell_content_icalcomp_is_delegated (icalcomponent *icalcomp,
                                         const gchar *user_email)
{
    icalproperty *prop;
    icalparameter *param;
    const gchar *delto = NULL;
    gboolean is_delegated = FALSE;

    prop = cal_shell_content_get_attendee_prop (icalcomp, user_email);

    if (prop != NULL) {
        param = icalproperty_get_first_parameter (
            prop, ICAL_DELEGATEDTO_PARAMETER);
        if (param != NULL) {
            delto = icalparameter_get_delegatedto (param);
            delto = itip_strip_mailto (delto);
        }
    } else
        return FALSE;

    prop = cal_shell_content_get_attendee_prop (icalcomp, delto);

    if (prop != NULL) {
        const gchar *delfrom = NULL;
        icalparameter_partstat status = ICAL_PARTSTAT_NONE;

        param = icalproperty_get_first_parameter (
            prop, ICAL_DELEGATEDFROM_PARAMETER);
        if (param != NULL) {
            delfrom = icalparameter_get_delegatedfrom (param);
            delfrom = itip_strip_mailto (delfrom);
        }
        param = icalproperty_get_first_parameter (
            prop, ICAL_PARTSTAT_PARAMETER);
        if (param != NULL)
            status = icalparameter_get_partstat (param);
        is_delegated =
            (status != ICAL_PARTSTAT_DECLINED) &&
            (g_strcmp0 (delfrom, user_email) == 0);
    }

    return is_delegated;
}

static guint32
cal_shell_content_check_state (EShellContent *shell_content)
{
    EShell *shell;
    EShellView *shell_view;
    EShellBackend *shell_backend;
    ESourceRegistry *registry;
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    ECalendarView *calendar_view;
    GnomeCalendarViewType view_type;
    gboolean selection_is_editable = FALSE;
    gboolean selection_is_instance = FALSE;
    gboolean selection_is_meeting = FALSE;
    gboolean selection_is_organizer = FALSE;
    gboolean selection_is_recurring = FALSE;
    gboolean selection_can_delegate = FALSE;
    guint32 state = 0;
    GList *selected;
    GList *link;
    guint n_selected;

    cal_shell_content = E_CAL_SHELL_CONTENT (shell_content);

    shell_view = e_shell_content_get_shell_view (shell_content);
    shell_backend = e_shell_view_get_shell_backend (shell_view);
    shell = e_shell_backend_get_shell (shell_backend);
    registry = e_shell_get_registry (shell);

    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);

    selected = e_calendar_view_get_selected_events (calendar_view);
    n_selected = g_list_length (selected);

    /* If we have a selection, assume it's
     * editable until we learn otherwise. */
    if (n_selected > 0)
        selection_is_editable = TRUE;

    for (link = selected; link != NULL; link = g_list_next (link)) {
        ECalendarViewEvent *event = link->data;
        ECalClient *client;
        ECalComponent *comp;
        gchar *user_email;
        icalcomponent *icalcomp;
        const gchar *capability;
        gboolean cap_delegate_supported;
        gboolean cap_delegate_to_many;
        gboolean icalcomp_is_delegated;
        gboolean read_only;

        if (!is_comp_data_valid (event))
            continue;

        client = event->comp_data->client;
        icalcomp = event->comp_data->icalcomp;

        read_only = e_client_is_readonly (E_CLIENT (client));
        selection_is_editable &= !read_only;

        selection_is_instance |=
            e_cal_util_component_is_instance (icalcomp);

        selection_is_meeting =
            (n_selected == 1) &&
            e_cal_util_component_has_attendee (icalcomp);

        selection_is_recurring |=
            e_cal_util_component_is_instance (icalcomp) ||
            e_cal_util_component_has_recurrences (icalcomp);

        /* XXX The rest of this is rather expensive and
         *     only applies if a single event is selected,
         *     so continue with the loop iteration if the
         *     rest of this is not applicable. */
        if (n_selected > 1)
            continue;

        /* XXX This probably belongs in comp-util.c. */

        comp = e_cal_component_new ();
        e_cal_component_set_icalcomponent (
            comp, icalcomponent_new_clone (icalcomp));
        user_email = itip_get_comp_attendee (
            registry, comp, client);

        selection_is_organizer =
            e_cal_util_component_has_organizer (icalcomp) &&
            itip_organizer_is_user (registry, comp, client);

        capability = CAL_STATIC_CAPABILITY_DELEGATE_SUPPORTED;
        cap_delegate_supported =
            e_client_check_capability (
            E_CLIENT (client), capability);

        capability = CAL_STATIC_CAPABILITY_DELEGATE_TO_MANY;
        cap_delegate_to_many =
            e_client_check_capability (
            E_CLIENT (client), capability);

        icalcomp_is_delegated =
            (user_email != NULL) &&
            cal_shell_content_icalcomp_is_delegated (
            icalcomp, user_email);

        selection_can_delegate =
            cap_delegate_supported &&
            (cap_delegate_to_many ||
            (!selection_is_organizer &&
             !icalcomp_is_delegated));

        g_free (user_email);
        g_object_unref (comp);
    }

    g_list_free (selected);

    if (n_selected == 1)
        state |= E_CAL_SHELL_CONTENT_SELECTION_SINGLE;
    if (n_selected > 1)
        state |= E_CAL_SHELL_CONTENT_SELECTION_MULTIPLE;
    if (selection_is_editable)
        state |= E_CAL_SHELL_CONTENT_SELECTION_IS_EDITABLE;
    if (selection_is_instance)
        state |= E_CAL_SHELL_CONTENT_SELECTION_IS_INSTANCE;
    if (selection_is_meeting)
        state |= E_CAL_SHELL_CONTENT_SELECTION_IS_MEETING;
    if (selection_is_organizer)
        state |= E_CAL_SHELL_CONTENT_SELECTION_IS_ORGANIZER;
    if (selection_is_recurring)
        state |= E_CAL_SHELL_CONTENT_SELECTION_IS_RECURRING;
    if (selection_can_delegate)
        state |= E_CAL_SHELL_CONTENT_SELECTION_CAN_DELEGATE;

    return state;
}

static void
cal_shell_content_focus_search_results (EShellContent *shell_content)
{
    ECalShellContent *cal_shell_content;
    GnomeCalendar *calendar;
    GnomeCalendarViewType view_type;
    ECalendarView *calendar_view;

    cal_shell_content = E_CAL_SHELL_CONTENT (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);

    gtk_widget_grab_focus (GTK_WIDGET (calendar_view));
}

static void
e_cal_shell_content_class_init (ECalShellContentClass *class)
{
    GObjectClass *object_class;
    GtkWidgetClass *widget_class;
    EShellContentClass *shell_content_class;

    g_type_class_add_private (class, sizeof (ECalShellContentPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = cal_shell_content_set_property;
    object_class->get_property = cal_shell_content_get_property;
    object_class->dispose = cal_shell_content_dispose;
    object_class->constructed = cal_shell_content_constructed;

    widget_class = GTK_WIDGET_CLASS (class);
    widget_class->map = cal_shell_content_map;

    shell_content_class = E_SHELL_CONTENT_CLASS (class);
    shell_content_class->check_state = cal_shell_content_check_state;
    shell_content_class->focus_search_results = cal_shell_content_focus_search_results;

    g_object_class_install_property (
        object_class,
        PROP_CALENDAR,
        g_param_spec_object (
            "calendar",
            NULL,
            NULL,
            GNOME_TYPE_CALENDAR,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_MEMO_TABLE,
        g_param_spec_object (
            "memo-table",
            NULL,
            NULL,
            E_TYPE_MEMO_TABLE,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_TASK_TABLE,
        g_param_spec_object (
            "task-table",
            NULL,
            NULL,
            E_TYPE_TASK_TABLE,
            G_PARAM_READABLE));
}

static void
e_cal_shell_content_class_finalize (ECalShellContentClass *class)
{
}

static void
e_cal_shell_content_init (ECalShellContent *cal_shell_content)
{
    cal_shell_content->priv =
        E_CAL_SHELL_CONTENT_GET_PRIVATE (cal_shell_content);

    /* Postpone widget construction until we have a shell view. */
}

void
e_cal_shell_content_type_register (GTypeModule *type_module)
{
    /* XXX G_DEFINE_DYNAMIC_TYPE declares a static type registration
     *     function, so we have to wrap it with a public function in
     *     order to register types from a separate compilation unit. */
    e_cal_shell_content_register_type (type_module);
}

GtkWidget *
e_cal_shell_content_new (EShellView *shell_view)
{
    g_return_val_if_fail (E_IS_SHELL_VIEW (shell_view), NULL);

    return g_object_new (
        E_TYPE_CAL_SHELL_CONTENT,
        "shell-view", shell_view, NULL);
}

ECalModel *
e_cal_shell_content_get_model (ECalShellContent *cal_shell_content)
{
    GnomeCalendar *calendar;

    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    calendar = e_cal_shell_content_get_calendar (cal_shell_content);

    return gnome_calendar_get_model (calendar);
}

GnomeCalendar *
e_cal_shell_content_get_calendar (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return GNOME_CALENDAR (cal_shell_content->priv->calendar);
}

EMemoTable *
e_cal_shell_content_get_memo_table (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return E_MEMO_TABLE (cal_shell_content->priv->memo_table);
}

ETaskTable *
e_cal_shell_content_get_task_table (ECalShellContent *cal_shell_content)
{
    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    return E_TASK_TABLE (cal_shell_content->priv->task_table);
}

EShellSearchbar *
e_cal_shell_content_get_searchbar (ECalShellContent *cal_shell_content)
{
    EShellView *shell_view;
    EShellContent *shell_content;
    GtkWidget *widget;

    g_return_val_if_fail (
        E_IS_CAL_SHELL_CONTENT (cal_shell_content), NULL);

    shell_content = E_SHELL_CONTENT (cal_shell_content);
    shell_view = e_shell_content_get_shell_view (shell_content);
    widget = e_shell_view_get_searchbar (shell_view);

    return E_SHELL_SEARCHBAR (widget);
}