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

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>  
 *
 *
 * Authors:
 *      Rodrigo Moya <rodrigo@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include <errno.h>
#include <string.h>
#include <glib/gi18n.h>
#include <bonobo/bonobo-control.h>
#include <bonobo/bonobo-exception.h>
#include <gconf/gconf-client.h>
#include <libecal/e-cal.h>
#include <libedataserver/e-data-server-util.h>
#include <libedataserver/e-url.h>
#include <libedataserverui/e-source-selector.h>
#include <shell/e-user-creatable-items-handler.h>
#include <shell/e-component-view.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 "e-cal-popup.h"
#include "common/authentication.h"
#include "dialogs/calendar-setup.h"
#include "dialogs/comp-editor.h"
#include "dialogs/copy-source-dialog.h"
#include "dialogs/task-editor.h"
#include "misc/e-info-label.h"
#include "e-util/e-error.h"

#define CREATE_TASK_ID               "task"
#define CREATE_TASK_ASSIGNED_ID      "task-assigned"
#define CREATE_TASK_LIST_ID          "task-list"

#define WEB_BASE_URI "webcal://"
#define PERSONAL_RELATIVE_URI "system"

#define PARENT_TYPE bonobo_object_get_type ()

static BonoboObjectClass *parent_class = NULL;

typedef struct
{
    ESourceList *source_list;

    GSList *source_selection;

    ETasks *tasks;
    ETable *table;
    ETableModel *model;

    GtkWidget *source_selector;

    BonoboControl *view_control;

    GList *notifications;

} TasksComponentView;

struct _TasksComponentPrivate {

    ESourceList *source_list;
    GSList *source_selection;

    GList *views;

    ECal *create_ecal;

    GList *notifications;
};

/* Utility functions.  */
/* FIXME Some of these are duplicated from calendar-component.c */
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 void
update_uris_for_selection (TasksComponentView *component_view)
{
    GSList *selection, *l, *uids_selected = NULL;

    selection = e_source_selector_get_selection (E_SOURCE_SELECTOR (component_view->source_selector));

    for (l = component_view->source_selection; l; l = l->next) {
        ESource *old_selected_source = l->data;

        if (!is_in_selection (selection, old_selected_source))
            e_tasks_remove_todo_source (component_view->tasks, old_selected_source);
    }

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

        e_tasks_add_todo_source (component_view->tasks, selected_source);
        uids_selected = g_slist_append (uids_selected, (char *)e_source_peek_uid (selected_source));
    }

    e_source_selector_free_selection (component_view->source_selection);
    component_view->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 (TasksComponentView *component_view)
{
    ESource *source;
    ECalendarTable *cal_table;
    ETable *etable;

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

    /* Set the default */
    e_tasks_set_default_source (component_view->tasks, source);

    cal_table = e_tasks_get_calendar_table (component_view->tasks);
    etable = e_calendar_table_get_table (cal_table);

    tasks_control_sensitize_commands (component_view->view_control, component_view->tasks, e_table_selected_count (etable));

    /* Save the selection for next time we start up */
    calendar_config_set_primary_tasks (e_source_peek_uid (source));
}

/* Callbacks.  */
static void
copy_task_list_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    TasksComponentView *component_view = data;
    ESource *selected_source;

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

    copy_source_dialog (GTK_WINDOW (gtk_widget_get_toplevel(ep->target->widget)), selected_source, E_CAL_SOURCE_TYPE_TODO);
}

static void
delete_task_list_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    TasksComponentView *component_view = data;
    ESource *selected_source;
    ECal *cal;
    char *uri;

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

    if (e_error_run((GtkWindow *)gtk_widget_get_toplevel(ep->target->widget),
            "calendar:prompt-delete-task-list", e_source_peek_name(selected_source), NULL) != GTK_RESPONSE_YES)
        return;

    /* first, ask the backend to remove the task list */
    uri = e_source_get_uri (selected_source);
    cal = e_cal_model_get_client_for_uri (
        e_calendar_table_get_model (E_CALENDAR_TABLE (e_tasks_get_calendar_table (component_view->tasks))),
        uri);
    if (!cal)
        cal = e_cal_new_from_uri (uri, E_CAL_SOURCE_TYPE_TODO);
    g_free (uri);
    if (cal) {
        if (e_cal_remove (cal, NULL)) {
            if (e_source_selector_source_is_selected (E_SOURCE_SELECTOR (component_view->source_selector),
                                  selected_source)) {
                e_tasks_remove_todo_source (component_view->tasks, selected_source);
                e_source_selector_unselect_source (E_SOURCE_SELECTOR (component_view->source_selector),
                                   selected_source);
            }

            e_source_group_remove_source (e_source_peek_group (selected_source), selected_source);
            e_source_list_sync (component_view->source_list, NULL);
        }
    }
}

static void
new_task_list_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    calendar_setup_new_task_list (GTK_WINDOW (gtk_widget_get_toplevel(ep->target->widget)));
}

static void
rename_task_list_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    TasksComponentView *component_view = data;
    ESourceSelector *selector;

    selector = E_SOURCE_SELECTOR (component_view->source_selector);
    e_source_selector_edit_primary_selection (selector);
}

static void
edit_task_list_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    TasksComponentView *component_view = data;
    ESource *selected_source;

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

    calendar_setup_edit_task_list (GTK_WINDOW (gtk_widget_get_toplevel(ep->target->widget)), selected_source);
}

static void 
set_offline_availability (EPopup *ep, EPopupItem *pitem, void *data, const char *value)
{
    TasksComponentView *component_view = data;
    ESource *selected_source;

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

    e_source_set_property (selected_source, "offline_sync", value);
}

static void
mark_no_offline_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    set_offline_availability (ep, pitem, data, "0"); 
}

static void
mark_offline_cb (EPopup *ep, EPopupItem *pitem, void *data)
{
    set_offline_availability (ep, pitem, data, "1"); 
}

static EPopupItem etc_source_popups[] = {
    { E_POPUP_ITEM, "10.new", N_("_New Task List"), new_task_list_cb, NULL, "stock_todo", 0, 0 },
    { E_POPUP_ITEM, "15.copy", N_("_Copy..."), copy_task_list_cb, NULL, "edit-copy", 0, E_CAL_POPUP_SOURCE_PRIMARY },
    { E_POPUP_ITEM, "18.rename", N_("_Rename..."), rename_task_list_cb, NULL, NULL, 0, E_CAL_POPUP_SOURCE_PRIMARY },

    { E_POPUP_BAR, "20.bar" },
    { E_POPUP_ITEM, "20.delete", N_("_Delete"), delete_task_list_cb, NULL, "edit-delete", 0, E_CAL_POPUP_SOURCE_USER|E_CAL_POPUP_SOURCE_PRIMARY },
    { E_POPUP_ITEM, "30.mark_tasks_offline", N_("_Make available for offline use"), mark_offline_cb, NULL, "stock_disconnect", E_CAL_POPUP_SOURCE_OFFLINE, E_CAL_POPUP_SOURCE_USER|E_CAL_POPUP_SOURCE_PRIMARY|E_CAL_POPUP_SOURCE_OFFLINE },
    { E_POPUP_ITEM, "40.mark_tasks_no_offline", N_("_Do not make available for offline use"), mark_no_offline_cb, NULL, "stock_connect", E_CAL_POPUP_SOURCE_NO_OFFLINE, E_CAL_POPUP_SOURCE_USER|E_CAL_POPUP_SOURCE_PRIMARY|E_CAL_POPUP_SOURCE_NO_OFFLINE },

    { E_POPUP_BAR, "99.bar" },
    { E_POPUP_ITEM, "99.properties", N_("_Properties"), edit_task_list_cb, NULL, "document-properties", 0, E_CAL_POPUP_SOURCE_PRIMARY },
};

static void
etc_source_popup_free(EPopup *ep, GSList *list, void *data)
{
    g_slist_free(list);
}

static gboolean
popup_event_cb(ESourceSelector *selector, ESource *insource, GdkEventButton *event, TasksComponentView *component_view)
{
    ECalPopup *ep;
    ECalPopupTargetSource *t;
    GSList *menus = NULL;
    int i;
    GtkMenu *menu;

    /** @HookPoint-ECalPopup: Tasks Source Selector Context Menu
     * @Id: org.gnome.evolution.tasks.source.popup
     * @Class: org.gnome.evolution.calendar.popup:1.0
     * @Target: ECalPopupTargetSource
     *
     * The context menu on the source selector in the tasks window.
     */
    ep = e_cal_popup_new("org.gnome.evolution.tasks.source.popup");
    t = e_cal_popup_target_new_source(ep, selector);
    t->target.widget = (GtkWidget *)component_view->tasks;

    for (i=0;i<sizeof(etc_source_popups)/sizeof(etc_source_popups[0]);i++)
        menus = g_slist_prepend(menus, &etc_source_popups[i]);

    e_popup_add_items((EPopup *)ep, menus, NULL,etc_source_popup_free, component_view);

    menu = e_popup_create_menu_once((EPopup *)ep, (EPopupTarget *)t, 0);
    gtk_menu_popup(menu, NULL, NULL, NULL, NULL, event?event->button:0, event?event->time:gtk_get_current_event_time());

    return TRUE;
}

static void
source_selection_changed_cb (ESourceSelector *selector, TasksComponentView *component_view)
{
    update_uris_for_selection (component_view);
}

static void
primary_source_selection_changed_cb (ESourceSelector *selector, TasksComponentView *component_view)
{
    update_uri_for_primary_selection (component_view);
}

static void
source_removed_cb (ETasks *tasks, ESource *source, TasksComponentView *component_view)
{
    e_source_selector_unselect_source (E_SOURCE_SELECTOR (component_view->source_selector), source);
}

static gboolean
update_single_object (ECal *client, icalcomponent *icalcomp)
{
    char *uid;
    icalcomponent *tmp_icalcomp;

    uid = (char *) icalcomponent_get_uid (icalcomp);

    if (e_cal_get_object (client, uid, NULL, &tmp_icalcomp, NULL))
        return e_cal_modify_object (client, icalcomp, CALOBJ_MOD_ALL, NULL);

    return e_cal_create_object (client, icalcomp, &uid, NULL);
}

static gboolean
update_objects (ECal *client, icalcomponent *icalcomp)
{
    icalcomponent *subcomp;
    icalcomponent_kind kind;

    kind = icalcomponent_isa (icalcomp);
    if (kind == ICAL_VTODO_COMPONENT || kind == ICAL_VEVENT_COMPONENT)
        return update_single_object (client, icalcomp);
    else if (kind != ICAL_VCALENDAR_COMPONENT)
        return FALSE;

    subcomp = icalcomponent_get_first_component (icalcomp, ICAL_ANY_COMPONENT);
    while (subcomp) {
        gboolean success;

        kind = icalcomponent_isa (subcomp);
        if (kind == ICAL_VTIMEZONE_COMPONENT) {
            icaltimezone *zone;

            zone = icaltimezone_new ();
            icaltimezone_set_component (zone, subcomp);

            success = e_cal_add_timezone (client, zone, NULL);
            icaltimezone_free (zone, 1);
            if (!success)
                return success;
        } else if (kind == ICAL_VTODO_COMPONENT ||
               kind == ICAL_VEVENT_COMPONENT) {
            success = update_single_object (client, subcomp);
            if (!success)
                return success;
        }

        subcomp = icalcomponent_get_next_component (icalcomp, ICAL_ANY_COMPONENT);
    }

    return TRUE;
}

static gboolean
selector_tree_data_dropped (ESourceSelector *selector,
                            GtkSelectionData *data,
                            ESource *destination,
                            GdkDragAction action,
                            guint info,
                            TasksComponent *component)
{
    gboolean success = FALSE;
    icalcomponent *icalcomp = NULL;
    ECal *client = NULL;
    GSList *components, *p;

    client = auth_new_cal_from_source (
        destination, E_CAL_SOURCE_TYPE_TODO);

    if (!client || !e_cal_open (client, TRUE, NULL))
        goto  finish;

    components = cal_comp_selection_get_string_list (data);
    for (p = components; p; p = p->next) {
        const char * uid;
        char *old_uid = NULL;
        icalcomponent *tmp_icalcomp = NULL;
        GError *error = NULL;
        char *comp_str; /* do not free this! */

        /* p->data is "source_uid\ncomponent_string" */
        comp_str = strchr (p->data, '\n');
        if (!comp_str)
            continue;

        comp_str [0] = 0;
        comp_str++;
        icalcomp = icalparser_parse_string (comp_str);

        if (!icalcomp)
            continue;

        /* FIXME deal with GDK_ACTION_ASK */
        if (action == GDK_ACTION_COPY) {
            old_uid = g_strdup (icalcomponent_get_uid (icalcomp));
            uid = e_cal_component_gen_uid ();
            icalcomponent_set_uid (icalcomp, uid);
        }

        uid = icalcomponent_get_uid (icalcomp);
        if (!old_uid)
            old_uid = g_strdup (uid);

        if (!e_cal_get_object (client, uid, NULL, &tmp_icalcomp, &error)) {
            if ((error != NULL) && (error->code != E_CALENDAR_STATUS_OBJECT_NOT_FOUND))
                g_message ("Failed to search the object in destination task list: %s",error->message);
            else {
                /* this will report success by last item, but we don't care */
                success = update_objects (client, icalcomp);

                if (success && action == GDK_ACTION_MOVE) {
                    /* remove components rather here, because we know which has been moved */
                    ESource *source_source;
                    ECal *source_client;

                    source_source = e_source_list_peek_source_by_uid (component->priv->source_list, p->data);

                    if (source_source && !E_IS_SOURCE_GROUP (source_source) && !e_source_get_readonly (source_source)) {
                        source_client = auth_new_cal_from_source (source_source, E_CAL_SOURCE_TYPE_TODO);

                        if (source_client) {
                            gboolean read_only = TRUE;

                            e_cal_is_read_only (source_client, &read_only, NULL);

                            if (!read_only && e_cal_open (source_client, TRUE, NULL))
                                e_cal_remove_object (source_client, old_uid, NULL);
                            else if (!read_only)
                                g_message ("Cannot open source client to remove old task");

                            g_object_unref (source_client);
                        } else
                            g_message ("Cannot create source client to remove old task");
                    }
                }
            }

            g_clear_error (&error);
        } else
            icalcomponent_free (tmp_icalcomp);

        g_free (old_uid);
        icalcomponent_free (icalcomp);
    }
    g_slist_foreach (components, (GFunc)g_free, NULL);
    g_slist_free (components);

 finish:
    if (client)
        g_object_unref (client);

    return success;
}

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 ECal *
setup_create_ecal (TasksComponent *component, TasksComponentView *component_view)
{
    TasksComponentPrivate *priv;
    ESource *source = NULL;
    char *uid;
    guint not;

    priv = component->priv;

    if (component_view) {
        ECal *default_ecal;

        default_ecal = e_tasks_get_default_client (component_view->tasks);
        if (default_ecal)
            return default_ecal;
    }

    if (priv->create_ecal)
        return priv->create_ecal;

    /* 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 = auth_new_cal_from_source (source, E_CAL_SOURCE_TYPE_TODO);
    }

    if (!priv->create_ecal) {
        /* Try to create a default if there isn't one */
        source = e_source_list_peek_source_any (priv->source_list);
        if (source)
            priv->create_ecal = auth_new_cal_from_source (source, E_CAL_SOURCE_TYPE_TODO);
    }

    if (priv->create_ecal) {
        icaltimezone *zone;

        zone = calendar_config_get_icaltimezone ();
        e_cal_set_default_timezone (priv->create_ecal, zone, NULL);

        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 NULL;
        }

    } else {
        GtkWidget *dialog;

        dialog = gtk_message_dialog_new (NULL, GTK_DIALOG_MODAL,
                         GTK_MESSAGE_WARNING, GTK_BUTTONS_OK,
                         "%s", _("There is no calendar available for creating tasks"));
        gtk_dialog_run (GTK_DIALOG (dialog));
        gtk_widget_destroy (dialog);

        return NULL;
    }

    /* Handle the fact it may change on us */
    not = calendar_config_add_notification_primary_tasks (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 priv->create_ecal ;
}

/* Ensures the calendar is selected */
static void
object_created_cb (CompEditor *ce, ECalendarTable *cal_table)
{
    g_return_if_fail (cal_table != NULL);

    cal_table->user_created_cal = comp_editor_get_client (ce);
    g_signal_emit_by_name (cal_table, "user_created");
    cal_table->user_created_cal = NULL;
}

static gboolean
create_new_todo (TasksComponent *task_component, gboolean is_assigned, TasksComponentView *component_view)
{
    ECal *ecal;
    ECalComponent *comp;
    CompEditor *editor;
    guint32 flags = 0;

    ecal = setup_create_ecal (task_component, component_view);
    if (!ecal)
        return FALSE;

    if (is_assigned)
        flags |= COMP_EDITOR_IS_ASSIGNED;

    flags |= COMP_EDITOR_NEW_ITEM | COMP_EDITOR_USER_ORG;

    editor = task_editor_new (ecal, flags);
    comp = cal_comp_task_new_with_defaults (ecal);

    if (component_view)
        g_signal_connect (editor, "object_created", G_CALLBACK (object_created_cb), e_tasks_get_calendar_table (component_view->tasks));

    comp_editor_edit_comp (editor, comp);
    if (is_assigned)
        task_editor_show_assignment (TASK_EDITOR (editor));
    gtk_window_present (GTK_WINDOW (editor));

    e_comp_editor_registry_add (comp_editor_registry, editor, TRUE);

    return TRUE;
}

static TasksComponentView *
create_component_view (TasksComponent *tasks_component)
{
    TasksComponentPrivate *priv;
    TasksComponentView *component_view;

    priv = tasks_component->priv;

    /* Create the calendar component view */
    component_view = g_new0 (TasksComponentView, 1);

    /* Add the source lists */
    component_view->source_list = g_object_ref (priv->source_list);

    /* Create sidebar selector */
    component_view->source_selector = e_source_selector_new (tasks_component->priv->source_list);

    g_signal_connect (component_view->source_selector, "drag-data-received",
              G_CALLBACK (selector_tree_drag_data_received), tasks_component);

    component_view->tasks = (ETasks *) bonobo_control_get_widget (component_view->view_control);
    component_view->table = e_calendar_table_get_table (e_tasks_get_calendar_table (component_view->tasks));
    component_view->model = E_TABLE_MODEL (e_calendar_table_get_model (e_tasks_get_calendar_table (component_view->tasks)));

    /* This signal is thrown if backends die - we update the selector */
    g_signal_connect (component_view->tasks, "source_removed",
              G_CALLBACK (source_removed_cb), component_view);

    /* connect after setting the initial selections, or we'll get unwanted calls
       to calendar_control_sensitize_calendar_commands */
    g_signal_connect (component_view->source_selector, "selection_changed",
              G_CALLBACK (source_selection_changed_cb), component_view);
    g_signal_connect (component_view->source_selector, "primary_selection_changed",
              G_CALLBACK (primary_source_selection_changed_cb), component_view);
    g_signal_connect (component_view->source_selector, "popup_event",
              G_CALLBACK (popup_event_cb), component_view);

    return component_view;
}

static void
destroy_component_view (TasksComponentView *component_view)
{
    GList *l;

    g_signal_handlers_disconnect_by_func (component_view->table, G_CALLBACK (table_selection_change_cb), component_view);
    g_signal_handlers_disconnect_matched (component_view->model, G_SIGNAL_MATCH_DATA, 0, 0, 0, 0, component_view);

    if (component_view->source_list)
        g_object_unref (component_view->source_list);

    if (component_view->source_selection)
        e_source_selector_free_selection (component_view->source_selection);

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

    g_free (component_view);
}

static void
view_destroyed_cb (gpointer data, GObject *where_the_object_was)
{
    TasksComponent *tasks_component = data;
    TasksComponentPrivate *priv;
    GList *l;

    priv = tasks_component->priv;

    for (l = priv->views; l; l = l->next) {
        TasksComponentView *component_view = l->data;

        if (G_OBJECT (component_view->view_control) == where_the_object_was) {
            priv->views = g_list_remove (priv->views, component_view);
            destroy_component_view (component_view);

            break;
        }
    }
}

static void
impl_handleURI (PortableServer_Servant servant, const char *uri, CORBA_Environment *ev)
{
    TasksComponent *tasks_component = TASKS_COMPONENT (bonobo_object_from_servant (servant));
    TasksComponentPrivate *priv;
    GList *l;
    TasksComponentView *view = NULL;

    char *src_uid = NULL;
    char *uid = NULL;
    char *rid = NULL;

    priv = tasks_component->priv;

    l = g_list_last (priv->views);
    if (!l)
        return;

    view = l->data;

    if (!strncmp (uri, "task:", 5)) {
        EUri *euri = e_uri_new (uri);
        const char *p;
        char *header, *content;
        size_t len, clen;

        p = euri->query;
        if (p) {
            while (*p) {
                len = strcspn (p, "=&");

                /* If it's malformed, give up. */
                if (p[len] != '=')
                    break;

                header = (char *) p;
                header[len] = '\0';
                p += len + 1;

                clen = strcspn (p, "&");

                content = g_strndup (p, clen);
                if (!g_ascii_strcasecmp (header, "source-uid")) {
                    src_uid = g_strdup (content);
                } else if (!g_ascii_strcasecmp (header, "comp-uid")) {
                    uid = g_strdup (content);
                } else if (!g_ascii_strcasecmp (header, "comp-rid")) {
                    rid = g_strdup (content);
                }
                g_free (content);

                p += clen;
                if (*p == '&') {
                    p++;
                    if (!strcmp (p, "amp;"))
                        p += 4;
                }
            }

            if (uid && src_uid) {
                e_tasks_open_task_id (view->tasks, src_uid, uid, rid);
            }

            g_free (src_uid);
            g_free (uid);
            g_free (rid);
        }
        e_uri_free (euri);
    }

    return;
}

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));

    if (strcmp (item_type_name, CREATE_TASK_ID) == 0) {
        if (!create_new_todo (tasks_component, FALSE, NULL))
            bonobo_exception_set (ev, ex_GNOME_Evolution_Component_Failed);
    } else if (strcmp (item_type_name, CREATE_TASK_ASSIGNED_ID) == 0) {
        if (!create_new_todo (tasks_component, TRUE, NULL))
            bonobo_exception_set (ev, ex_GNOME_Evolution_Component_Failed);
    } else if (strcmp (item_type_name, CREATE_TASK_LIST_ID) == 0) {
        /* FIXME Should we use the last opened window? */
        calendar_setup_new_task_list (NULL);
    } else {
        bonobo_exception_set (ev, ex_GNOME_Evolution_Component_UnknownType);
    }
}

/* GObject methods.  */

static void
impl_dispose (GObject *object)
{
    TasksComponent *tasks_component = TASKS_COMPONENT (object);
    TasksComponentPrivate *priv = tasks_component->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->create_ecal) {
        g_object_unref (priv->create_ecal);
        priv->create_ecal = NULL;
    }

    for (l = priv->views; l; l = l->next) {
        TasksComponentView *component_view = l->data;

        g_object_weak_unref (G_OBJECT (component_view->view_control), view_destroyed_cb, tasks_component);
    }
    g_list_free (priv->views);
    priv->views = 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;
    GList *l;

    for (l = priv->views; l; l = l->next) {
        TasksComponentView *component_view = l->data;

        destroy_component_view (component_view);
    }
    g_list_free (priv->views);

    g_free (priv);

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

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->requestCreateItem       = impl_requestCreateItem;
    epv->handleURI               = impl_handleURI;

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

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

    priv = g_new0 (TasksComponentPrivate, 1);

    component->priv = priv;
}