path: root/calendar/gui/tasks-component.c

/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* tasks-component.c
 *
 * Copyright (C) 2003  Rodrigo Moya
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 * Author: Rodrigo Moya <rodrigo@ximian.com>
 */

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

#include <errno.h>
#include <string.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-i18n.h>
#include <bonobo/bonobo-exception.h>
#include <gconf/gconf-client.h>
#include <libecal/e-cal.h>
#include "e-cal-model.h"
#include "e-tasks.h"
#include "tasks-component.h"
#include "tasks-control.h"
#include "e-comp-editor-registry.h"
#include "migration.h"
#include "comp-util.h"
#include "calendar-config.h"
#include "dialogs/comp-editor.h"
#include "dialogs/copy-source-dialog.h"
#include "dialogs/new-task-list.h"
#include "dialogs/task-editor.h"
#include "widgets/misc/e-source-selector.h"


#define CREATE_TASK_ID "task"


#define PARENT_TYPE bonobo_object_get_type ()

static BonoboObjectClass *parent_class = NULL;

/* Tasks should have their own registry */
extern ECompEditorRegistry *comp_editor_registry;

struct _TasksComponentPrivate {
    char *config_directory;
    GConfClient *gconf_client;

    ESourceList *source_list;
    GSList *source_selection;

    ETasks *tasks;
    GtkWidget *source_selector;

    BonoboControl *view_control;

    ECal *create_ecal;

    GList *notifications;
};

/* Utility functions.  */
/* FIXME Some of these are duplicated from calendar-component.c */
static void
add_uri_for_source (ESource *source, ETasks *tasks)
{
    char *uri = e_source_get_uri (source);

    e_tasks_add_todo_uri (tasks, uri);
    g_free (uri);
}

static void
remove_uri_for_source (ESource *source, ETasks *tasks)
{
    char *uri = e_source_get_uri (source);

    e_tasks_remove_todo_uri (tasks, uri);
    g_free (uri);
}

static gboolean
is_in_selection (GSList *selection, ESource *source)
{
    GSList *l;
    
    for (l = selection; l; l = l->next) {
        ESource *selected_source = l->data;
        
        if (!strcmp (e_source_peek_uid (selected_source), e_source_peek_uid (source)))
            return TRUE;
    }

    return FALSE;
}

static gboolean
is_in_uids (GSList *uids, ESource *source)
{
    GSList *l;
    
    for (l = uids; l; l = l->next) {
        const char *uid = l->data;
        
        if (!strcmp (uid, e_source_peek_uid (source)))
            return TRUE;
    }

    return FALSE;
}

static ESource *
find_first_source (ESourceList *source_list)
{
    GSList *groups, *sources, *l, *m;
            
    groups = e_source_list_peek_groups (source_list);
    for (l = groups; l; l = l->next) {
        ESourceGroup *group = l->data;
                
        sources = e_source_group_peek_sources (group);
        for (m = sources; m; m = m->next) {
            ESource *source = m->data;

            return source;
        }               
    }

    return NULL;
}

static void
update_uris_for_selection (TasksComponent *component)
{
    TasksComponentPrivate *priv;
    GSList *selection, *l, *uids_selected = NULL;
    
    priv = component->priv;

    selection = e_source_selector_get_selection (E_SOURCE_SELECTOR (priv->source_selector));
    
    for (l = priv->source_selection; l; l = l->next) {
        ESource *old_selected_source = l->data;

        if (!is_in_selection (selection, old_selected_source))
            remove_uri_for_source (old_selected_source, E_TASKS (priv->tasks));
    }   
    
    for (l = selection; l; l = l->next) {
        ESource *selected_source = l->data;
        
        add_uri_for_source (selected_source, E_TASKS (priv->tasks));
        uids_selected = g_slist_append (uids_selected, (char *)e_source_peek_uid (selected_source));
    }

    e_source_selector_free_selection (priv->source_selection);
    priv->source_selection = selection;

    /* Save the selection for next time we start up */
    calendar_config_set_tasks_selected (uids_selected);
    g_slist_free (uids_selected);
}

static void
update_uri_for_primary_selection (TasksComponent *component)
{
    TasksComponentPrivate *priv;
    ESource *source;
    char *uri;

    priv = component->priv;
    
    source = e_source_selector_peek_primary_selection (E_SOURCE_SELECTOR (priv->source_selector));
    if (!source)
        return;

    /* Set the default */
    uri = e_source_get_uri (source);
    e_tasks_set_default_uri (priv->tasks, uri);
    g_free (uri);
    
    /* Save the selection for next time we start up */
    calendar_config_set_primary_tasks (e_source_peek_uid (source));
}

static void
update_selection (TasksComponent *task_component)
{
    TasksComponentPrivate *priv;
    GSList *selection, *uids_selected, *l;

    priv = task_component->priv;

    /* Get the selection in gconf */
    uids_selected = calendar_config_get_tasks_selected ();

    /* Remove any that aren't there any more */
    selection = e_source_selector_get_selection (E_SOURCE_SELECTOR (priv->source_selector));

    for (l = selection; l; l = l->next) {
        ESource *source = l->data;

        if (!is_in_uids (uids_selected, source)) 
            e_source_selector_unselect_source (E_SOURCE_SELECTOR (priv->source_selector), source);
    }
    
    e_source_selector_free_selection (selection);

    /* Make sure the whole selection is there */
    for (l = uids_selected; l; l = l->next) {
        char *uid = l->data;
        ESource *source;

        source = e_source_list_peek_source_by_uid (priv->source_list, uid);
        if (source) 
            e_source_selector_select_source (E_SOURCE_SELECTOR (priv->source_selector), source);
        
        g_free (uid);
    }
    g_slist_free (uids_selected);
}

static void
update_primary_selection (TasksComponent *component)
{
    TasksComponentPrivate *priv;
    ESource *source;
    char *uid;

    priv = component->priv;

    uid = calendar_config_get_primary_tasks ();
    if (uid) {
        source = e_source_list_peek_source_by_uid (priv->source_list, uid);
        g_free (uid);
    
        e_source_selector_set_primary_selection (E_SOURCE_SELECTOR (priv->source_selector), source);
    } else {
        ESource *source;
        
        /* Try to create a default if there isn't one */
        source = find_first_source (priv->source_list);
        if (source)
            e_source_selector_set_primary_selection (E_SOURCE_SELECTOR (priv->source_selector), source);
    }
}

/* FIXME This is duplicated from comp-editor-factory.c, should it go in comp-util? */
static ECalComponent *
get_default_task (ECal *ecal)
{
    ECalComponent *comp;
    
    comp = cal_comp_task_new_with_defaults (ecal);

    return comp;
}

/* Callbacks.  */
static void
add_popup_menu_item (GtkMenu *menu, const char *label, const char *pixmap,
             GCallback callback, gpointer user_data, gboolean sensitive)
{
    GtkWidget *item, *image;

    if (pixmap) {
        item = gtk_image_menu_item_new_with_label (label);

        /* load the image */
        image = gtk_image_new_from_stock (pixmap, GTK_ICON_SIZE_MENU);
        if (!image)
            image = gtk_image_new_from_file (pixmap);

        if (image) {
            gtk_widget_show (image);
            gtk_image_menu_item_set_image (GTK_IMAGE_MENU_ITEM (item), image);
        }
    } else {
        item = gtk_menu_item_new_with_label (label);
    }

    if (callback)
        g_signal_connect (G_OBJECT (item), "activate", callback, user_data);

    if (!sensitive)
        gtk_widget_set_sensitive (item, FALSE);

    gtk_menu_shell_append (GTK_MENU_SHELL (menu), item);
    gtk_widget_show (item);
}

static void
copy_task_list_cb (GtkWidget *widget, TasksComponent *comp)
{
    ESource *selected_source;
    TasksComponentPrivate *priv;

    priv = comp->priv;
    
    selected_source = e_source_selector_peek_primary_selection (E_SOURCE_SELECTOR (priv->source_selector));
    if (!selected_source)
        return;

    copy_source_dialog (GTK_WINDOW (gtk_widget_get_toplevel (widget)), selected_source, CALOBJ_TYPE_TODO);
}

static void
delete_task_list_cb (GtkWidget *widget, TasksComponent *comp)
{
    ESource *selected_source;
    TasksComponentPrivate *priv;
    GtkWidget *dialog;

    priv = comp->priv;
    
    selected_source = e_source_selector_peek_primary_selection (E_SOURCE_SELECTOR (priv->source_selector));
    if (!selected_source)
        return;

    /* create the confirmation dialog */
    dialog = gtk_message_dialog_new (
        GTK_WINDOW (gtk_widget_get_toplevel (widget)),
        GTK_DIALOG_MODAL,
        GTK_MESSAGE_QUESTION,
        GTK_BUTTONS_YES_NO,
        _("Task List '%s' will be removed. Are you sure you want to continue?"),
        e_source_peek_name (selected_source));
    if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_YES) {
        if (e_source_selector_source_is_selected (E_SOURCE_SELECTOR (priv->source_selector),
                              selected_source))
            e_source_selector_unselect_source (E_SOURCE_SELECTOR (priv->source_selector),
                               selected_source);

        e_source_group_remove_source (e_source_peek_group (selected_source), selected_source);

        /* FIXME: remove the tasks.ics file and the directory */
    }

    gtk_widget_destroy (dialog);
}

static void
new_task_list_cb (GtkWidget *widget, TasksComponent *component)
{
    new_task_list_dialog (GTK_WINDOW (gtk_widget_get_toplevel (widget)));
}

static void
rename_task_list_cb (GtkWidget *widget, TasksComponent *comp)
{
    TasksComponentPrivate *priv;
    ESource *selected_source;
    GtkWidget *dialog, *entry;

    priv = comp->priv;
    
    selected_source = e_source_selector_peek_primary_selection (E_SOURCE_SELECTOR (priv->source_selector));
    if (!selected_source)
        return;

    /* create the dialog to prompt the user for the new name */
    dialog = gtk_message_dialog_new (GTK_WINDOW (gtk_widget_get_toplevel (widget)),
                     GTK_DIALOG_MODAL,
                     GTK_MESSAGE_QUESTION,
                     GTK_BUTTONS_OK_CANCEL,
                     _("Rename this task list to"));
    entry = gtk_entry_new ();
    gtk_entry_set_text (GTK_ENTRY (entry), e_source_peek_name (selected_source));
    gtk_widget_show (entry);
    gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox), entry, TRUE, FALSE, 6);

    if (gtk_dialog_run (GTK_DIALOG (dialog)) == GTK_RESPONSE_OK)
        e_source_set_name (selected_source, gtk_entry_get_text (GTK_ENTRY (entry)));

    gtk_widget_destroy (dialog);
}

static void
fill_popup_menu_cb (ESourceSelector *selector, GtkMenu *menu, TasksComponent *component)
{
    gboolean sensitive;

    sensitive = e_source_selector_peek_primary_selection (E_SOURCE_SELECTOR (component->priv->source_selector)) ?
        TRUE : FALSE;

    add_popup_menu_item (menu, _("New Task List"), GTK_STOCK_NEW, G_CALLBACK (new_task_list_cb),
                 component, TRUE);
    add_popup_menu_item (menu, _("Copy"), NULL, G_CALLBACK (copy_task_list_cb), component, sensitive);
    add_popup_menu_item (menu, _("Rename"), NULL, G_CALLBACK (rename_task_list_cb),
                 component, sensitive);
    add_popup_menu_item (menu, _("Delete"), GTK_STOCK_DELETE, G_CALLBACK (delete_task_list_cb),
                 component, sensitive);
}

static void
source_selection_changed_cb (ESourceSelector *selector, TasksComponent *component)
{
    update_uris_for_selection (component);
}

static void
primary_source_selection_changed_cb (ESourceSelector *selector, TasksComponent *component)
{
    update_uri_for_primary_selection (component);
}

static void
config_selection_changed_cb (GConfClient *client, guint id, GConfEntry *entry, gpointer data)
{
    update_selection (data);
}

static void
config_primary_selection_changed_cb (GConfClient *client, guint id, GConfEntry *entry, gpointer data)
{
    update_primary_selection (data);
}

/* GObject methods */

static void
impl_dispose (GObject *object)
{
    TasksComponentPrivate *priv = TASKS_COMPONENT (object)->priv;
    GList *l;
    
    if (priv->source_list != NULL) {
        g_object_unref (priv->source_list);
        priv->source_list = NULL;
    }

    if (priv->source_selection != NULL) {
        e_source_selector_free_selection (priv->source_selection);
        priv->source_selection = NULL;
    }

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

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

    for (l = priv->notifications; l; l = l->next)
        calendar_config_remove_notification (GPOINTER_TO_UINT (l->data));
    g_list_free (priv->notifications);
    priv->notifications = NULL;

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

static void
impl_finalize (GObject *object)
{
    TasksComponentPrivate *priv = TASKS_COMPONENT (object)->priv;

    g_free (priv->config_directory);
    g_free (priv);

    (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}

/* Evolution::Component CORBA methods */

static void
impl_createControls (PortableServer_Servant servant,
             Bonobo_Control *corba_sidebar_control,
             Bonobo_Control *corba_view_control,
             Bonobo_Control *corba_statusbar_control,
             CORBA_Environment *ev)
{
    TasksComponent *component = TASKS_COMPONENT (bonobo_object_from_servant (servant));
    TasksComponentPrivate *priv;
    GtkWidget *selector_scrolled_window;
    BonoboControl *sidebar_control;
    guint not;
    
    priv = component->priv;

    /* create sidebar selector */
    priv->source_selector = e_source_selector_new (priv->source_list);
    gtk_widget_show (priv->source_selector);

    selector_scrolled_window = gtk_scrolled_window_new (NULL, NULL);
    gtk_container_add (GTK_CONTAINER (selector_scrolled_window), priv->source_selector);
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (selector_scrolled_window),
                    GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (selector_scrolled_window),
                         GTK_SHADOW_IN);
    gtk_widget_show (selector_scrolled_window);

    sidebar_control = bonobo_control_new (selector_scrolled_window);

    /* create the tasks view */
    priv->view_control = tasks_control_new ();
    if (!priv->view_control) {
        g_warning (G_STRLOC ": could not create the control!");
        bonobo_exception_set (ev, ex_GNOME_Evolution_Component_Failed);
        return;
    }

    priv->tasks = (ETasks *) bonobo_control_get_widget (priv->view_control);

    g_signal_connect_object (priv->source_selector, "selection_changed",
                 G_CALLBACK (source_selection_changed_cb),
                 G_OBJECT (component), 0);
    g_signal_connect_object (priv->source_selector, "primary_selection_changed",
                 G_CALLBACK (primary_source_selection_changed_cb),
                 G_OBJECT (component), 0);
    g_signal_connect_object (priv->source_selector, "fill_popup_menu",
                 G_CALLBACK (fill_popup_menu_cb),
                 G_OBJECT (component), 0);

    /* Load the selection from the last run */
    update_selection (component);
    update_primary_selection (component);

    /* If it gets fiddled with update */
    not = calendar_config_add_notification_tasks_selected (config_selection_changed_cb, 
                                   component);
    priv->notifications = g_list_prepend (priv->notifications, GUINT_TO_POINTER (not));

    not = calendar_config_add_notification_primary_tasks (config_primary_selection_changed_cb, 
                                  component);
    priv->notifications = g_list_prepend (priv->notifications, GUINT_TO_POINTER (not));

    /* Return the controls */
    *corba_sidebar_control = CORBA_Object_duplicate (BONOBO_OBJREF (sidebar_control), ev);
    *corba_view_control = CORBA_Object_duplicate (BONOBO_OBJREF (priv->view_control), ev);

    /* The tasks component doesn't use the status bar so just return an empty label.  */
    {
        GtkWidget *label = gtk_label_new ("");
        BonoboControl *control;

        gtk_widget_show (label);
        control = bonobo_control_new (label);
        *corba_statusbar_control = CORBA_Object_duplicate (BONOBO_OBJREF (control), ev);
    }
}

static GNOME_Evolution_CreatableItemTypeList *
impl__get_userCreatableItems (PortableServer_Servant servant,
                  CORBA_Environment *ev)
{
    GNOME_Evolution_CreatableItemTypeList *list = GNOME_Evolution_CreatableItemTypeList__alloc ();

    list->_length  = 1;
    list->_maximum = list->_length;
    list->_buffer  = GNOME_Evolution_CreatableItemTypeList_allocbuf (list->_length);

    CORBA_sequence_set_release (list, FALSE);

    list->_buffer[0].id = CREATE_TASK_ID;
    list->_buffer[0].description = _("New task");
    list->_buffer[0].menuDescription = _("_Task");
    list->_buffer[0].tooltip = _("Create a new task");
    list->_buffer[0].menuShortcut = 't';
    list->_buffer[0].iconName = "new_task-16.png";

    return list;
}

static void
config_create_ecal_changed_cb (GConfClient *client, guint id, GConfEntry *entry, gpointer data)
{   
    TasksComponent *component = data;
    TasksComponentPrivate *priv;
    
    priv = component->priv;

    g_object_unref (priv->create_ecal);
    priv->create_ecal = NULL;
    
    priv->notifications = g_list_remove (priv->notifications, GUINT_TO_POINTER (id));
}

static gboolean
setup_create_ecal (TasksComponent *component) 
{
    TasksComponentPrivate *priv;
    ESource *source = NULL;
    char *uid;
    guint not;
    
    priv = component->priv;

    if (priv->create_ecal)
        return TRUE; 

    /* Try to use the client from the calendar first to avoid re-opening things */
    if (priv->tasks) {
        ECal *default_ecal;
        
        default_ecal = e_tasks_get_default_client (priv->tasks);
        if (default_ecal) {
            priv->create_ecal = g_object_ref (default_ecal);
            return TRUE;
        }
    }
    
    /* Get the current primary calendar, or try to set one if it doesn't already exist */       
    uid = calendar_config_get_primary_tasks ();
    if (uid) {
        source = e_source_list_peek_source_by_uid (priv->source_list, uid);
        g_free (uid);

        priv->create_ecal = e_cal_new (source, CALOBJ_TYPE_TODO);
    } 

    if (!priv->create_ecal) {
        /* Try to create a default if there isn't one */
        source = find_first_source (priv->source_list);
        if (source)
            priv->create_ecal = e_cal_new (source, CALOBJ_TYPE_TODO);
    }
        
    if (priv->create_ecal) {
        if (!e_cal_open (priv->create_ecal, FALSE, NULL)) {
            GtkWidget *dialog;
            
            dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
                             GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
                             _("Unable to open the task list '%s' for creating events and meetings"), 
                               e_source_peek_name (source));
            gtk_dialog_run (GTK_DIALOG (dialog));
            gtk_widget_destroy (dialog);

            return FALSE;
        }
    } else {
        GtkWidget *dialog;
            
        dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
                         GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
                         _("There is no calendar available for creating tasks"));
        gtk_dialog_run (GTK_DIALOG (dialog));
        gtk_widget_destroy (dialog);

        return FALSE;
    }       

    /* Handle the fact it may change on us */
    not = calendar_config_add_notification_primary_calendar (config_create_ecal_changed_cb, 
                                 component);
    priv->notifications = g_list_prepend (priv->notifications, GUINT_TO_POINTER (not));

    /* Save the primary source for use elsewhere */
    calendar_config_set_primary_tasks (e_source_peek_uid (source));

    return TRUE;
}

static void
impl_requestCreateItem (PortableServer_Servant servant,
            const CORBA_char *item_type_name,
            CORBA_Environment *ev)
{
    TasksComponent *tasks_component = TASKS_COMPONENT (bonobo_object_from_servant (servant));
    TasksComponentPrivate *priv;
    ECalComponent *comp;
    TaskEditor *editor;
    
    priv = tasks_component->priv;

    if (!setup_create_ecal (tasks_component))
        return; 
        
    editor = task_editor_new (priv->create_ecal);
    
    if (strcmp (item_type_name, CREATE_TASK_ID) == 0) {
        comp = get_default_task (priv->create_ecal);
    } else {
        bonobo_exception_set (ev, ex_GNOME_Evolution_Component_UnknownType);
        return;
    }   

    comp_editor_edit_comp (COMP_EDITOR (editor), comp);
    comp_editor_focus (COMP_EDITOR (editor));

    e_comp_editor_registry_add (comp_editor_registry, COMP_EDITOR (editor), TRUE);
}

/* Initialization */

static void
tasks_component_class_init (TasksComponentClass *klass)
{
    POA_GNOME_Evolution_Component__epv *epv = &klass->epv;
    GObjectClass *object_class = G_OBJECT_CLASS (klass);

    parent_class = g_type_class_peek_parent (klass);

    epv->createControls          = impl_createControls;
    epv->_get_userCreatableItems = impl__get_userCreatableItems;
    epv->requestCreateItem       = impl_requestCreateItem;

    object_class->dispose = impl_dispose;
    object_class->finalize = impl_finalize;
}

static void
tasks_component_init (TasksComponent *component, TasksComponentClass *klass)
{
    TasksComponentPrivate *priv;
    GSList *groups;

    priv = g_new0 (TasksComponentPrivate, 1);
    priv->config_directory = g_build_filename (g_get_home_dir (),
                           ".evolution", "tasks", "config",
                           NULL);

    /* load the groups from the configuration */
    priv->gconf_client = gconf_client_get_default ();
    priv->source_list = e_source_list_new_for_gconf (priv->gconf_client,
                             "/apps/evolution/tasks/sources");

    /* create default tasks folders if there are no groups */
    groups = e_source_list_peek_groups (priv->source_list);
    if (!groups) {
        ESourceGroup *group;
        ESource *source;
        char *base_uri, *new_dir;

        /* create the source group */
        base_uri = g_build_filename (g_get_home_dir (),
                         ".evolution/tasks/local/OnThisComputer/",
                         NULL);
        group = e_source_group_new (_("On This Computer"), base_uri);
        e_source_list_add_group (priv->source_list, group, -1);

        /* migrate tasks from older setup */
        if (!migrate_old_tasks (group)) {
            /* create default tasks folders */
            new_dir = g_build_filename (base_uri, "Personal/", NULL);
            if (!e_mkdir_hier (new_dir, 0700)) {
                source = e_source_new (_("Personal"), "Personal");
                e_source_group_add_source (group, source, -1);
            }

            g_free (new_dir);
        }

        g_free (base_uri);
    }

    component->priv = priv;
}

/* Public API */

TasksComponent *
tasks_component_peek (void)
{
    static TasksComponent *component = NULL;

    if (component == NULL) {
        component = g_object_new (tasks_component_get_type (), NULL);

        if (e_mkdir_hier (component->priv->config_directory, 0777) != 0) {
            g_warning (G_STRLOC ": Cannot create directory %s: %s",
                   component->priv->config_directory, g_strerror (errno));
            g_object_unref (component);
            component = NULL;
        }
    }

    return component;
}

const char *
tasks_component_peek_config_directory (TasksComponent *component)
{
    return (const char *) component->priv->config_directory;
}

BONOBO_TYPE_FUNC_FULL (TasksComponent, GNOME_Evolution_Component, PARENT_TYPE, tasks_component)