mirror of
https://gitlab.gnome.org/GNOME/nautilus
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206 lines
5.9 KiB
C
206 lines
5.9 KiB
C
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
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/* nautilus-undo.c - public interface for objects that implement
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* undoable actions -- works across components
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*
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* Copyright (C) 2000 Eazel, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*
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* Author: Darin Adler <darin@bentspoon.com>
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*/
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#include <config.h>
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#include "nautilus-undo.h"
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#include "nautilus-undo-private.h"
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#include "nautilus-undo-transaction.h"
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#include <gtk/gtk.h>
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#define NAUTILUS_UNDO_MANAGER_DATA "Nautilus undo manager"
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/* Register a simple undo action by calling nautilus_undo_register_full. */
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void
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nautilus_undo_register (GObject *target,
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NautilusUndoCallback callback,
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gpointer callback_data,
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GDestroyNotify callback_data_destroy_notify,
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const char *operation_name,
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const char *undo_menu_item_label,
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const char *undo_menu_item_hint,
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const char *redo_menu_item_label,
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const char *redo_menu_item_hint)
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{
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NautilusUndoAtom atom;
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GList single_atom_list;
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g_return_if_fail (G_IS_OBJECT (target));
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g_return_if_fail (callback != NULL);
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/* Make an atom. */
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atom.target = target;
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atom.callback = callback;
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atom.callback_data = callback_data;
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atom.callback_data_destroy_notify = callback_data_destroy_notify;
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/* Make a single-atom list. */
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single_atom_list.data = &atom;
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single_atom_list.next = NULL;
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single_atom_list.prev = NULL;
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/* Call the full version of the registration function,
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* using the undo target as the place to search for the
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* undo manager.
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*/
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nautilus_undo_register_full (&single_atom_list,
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target,
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operation_name,
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undo_menu_item_label,
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undo_menu_item_hint,
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redo_menu_item_label,
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redo_menu_item_hint);
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}
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/* Register an undo action. */
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void
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nautilus_undo_register_full (GList *atoms,
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GObject *undo_manager_search_start_object,
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const char *operation_name,
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const char *undo_menu_item_label,
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const char *undo_menu_item_hint,
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const char *redo_menu_item_label,
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const char *redo_menu_item_hint)
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{
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NautilusUndoTransaction *transaction;
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GList *p;
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g_return_if_fail (atoms != NULL);
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g_return_if_fail (G_IS_OBJECT (undo_manager_search_start_object));
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/* Create an undo transaction */
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transaction = nautilus_undo_transaction_new (operation_name,
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undo_menu_item_label,
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undo_menu_item_hint,
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redo_menu_item_label,
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redo_menu_item_hint);
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for (p = atoms; p != NULL; p = p->next) {
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nautilus_undo_transaction_add_atom (transaction, p->data);
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}
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nautilus_undo_transaction_add_to_undo_manager
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(transaction,
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nautilus_undo_get_undo_manager (undo_manager_search_start_object));
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/* Now we are done with the transaction.
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* If the undo manager is holding it, then this will not destroy it.
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*/
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g_object_unref (transaction);
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}
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/* Cover for forgetting about all undo relating to a particular target. */
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void
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nautilus_undo_unregister (GObject *target)
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{
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/* Perhaps this should also unregister all children if called on a
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* GtkContainer? That might be handy.
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*/
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nautilus_undo_transaction_unregister_object (target);
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}
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void
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nautilus_undo (GObject *undo_manager_search_start_object)
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{
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NautilusUndoManager *manager;
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g_return_if_fail (G_IS_OBJECT (undo_manager_search_start_object));
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manager = nautilus_undo_get_undo_manager (undo_manager_search_start_object);
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if (manager != NULL) {
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nautilus_undo_manager_undo (manager);
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}
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}
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NautilusUndoManager *
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nautilus_undo_get_undo_manager (GObject *start_object)
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{
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NautilusUndoManager *manager;
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GtkWidget *parent;
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GtkWindow *transient_parent;
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if (start_object == NULL) {
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return NULL;
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}
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g_return_val_if_fail (G_IS_OBJECT (start_object), NULL);
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/* Check for an undo manager right here. */
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manager = g_object_get_data (start_object, NAUTILUS_UNDO_MANAGER_DATA);
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if (manager != NULL) {
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return manager;
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}
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/* Check for undo manager up the parent chain. */
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if (GTK_IS_WIDGET (start_object)) {
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parent = gtk_widget_get_parent (GTK_WIDGET (start_object));
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if (parent != NULL) {
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manager = nautilus_undo_get_undo_manager (G_OBJECT (parent));
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if (manager != NULL) {
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return manager;
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}
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}
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/* Check for undo manager in our window's parent. */
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if (GTK_IS_WINDOW (start_object)) {
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transient_parent = gtk_window_get_transient_for (GTK_WINDOW (start_object));
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if (transient_parent != NULL) {
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manager = nautilus_undo_get_undo_manager (G_OBJECT (transient_parent));
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if (manager != NULL) {
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return manager;
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}
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}
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}
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}
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/* Found nothing. I can live with that. */
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return NULL;
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}
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void
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nautilus_undo_attach_undo_manager (GObject *object,
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NautilusUndoManager *manager)
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{
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g_return_if_fail (G_IS_OBJECT (object));
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if (manager == NULL) {
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g_object_set_data (object, NAUTILUS_UNDO_MANAGER_DATA, NULL);
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} else {
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g_object_ref (manager);
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g_object_set_data_full
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(object, NAUTILUS_UNDO_MANAGER_DATA,
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manager, g_object_unref);
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}
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}
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/* Copy a reference to the undo manager fromone object to another. */
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void
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nautilus_undo_share_undo_manager (GObject *destination_object,
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GObject *source_object)
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{
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NautilusUndoManager *manager;
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manager = nautilus_undo_get_undo_manager (source_object);
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nautilus_undo_attach_undo_manager (destination_object, manager);
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}
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