moving from https://github.com/perberos/mate-desktop-environment

author: Perberos <[email protected]> 2011-12-01 22:24:23 -0300
committer: Perberos <[email protected]> 2011-12-01 22:24:23 -0300
commit: 0e004c696b0e68b2cff37a4c3315b022a35eaf43 (patch)
tree: 43261e815529cb9518ed7be37af13b846af8b26b /libcaja-private/caja-undo.c
download: caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.bz2
caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.xz
1 files changed, 218 insertions, 0 deletions
diff --git a/libcaja-private/caja-undo.c b/libcaja-private/caja-undo.c
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+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* caja-undo.c - public interface for objects that implement
+ * undoable actions -- works across components
+ *
+ * Copyright (C) 2000 Eazel, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ *
+ * Author: Darin Adler <[email protected]>
+ */
+
+#include <config.h>
+#include "caja-undo.h"
+
+#include "caja-undo-private.h"
+#include "caja-undo-transaction.h"
+#include <gtk/gtk.h>
+
+#define CAJA_UNDO_MANAGER_DATA "Caja undo manager"
+
+/* Register a simple undo action by calling caja_undo_register_full. */
+void
+caja_undo_register (GObject *target,
+ CajaUndoCallback callback,
+ gpointer callback_data,
+ GDestroyNotify callback_data_destroy_notify,
+ const char *operation_name,
+ const char *undo_menu_item_label,
+ const char *undo_menu_item_hint,
+ const char *redo_menu_item_label,
+ const char *redo_menu_item_hint)
+{
+ CajaUndoAtom atom;
+ GList single_atom_list;
+
+ g_return_if_fail (G_IS_OBJECT (target));
+ g_return_if_fail (callback != NULL);
+
+ /* Make an atom. */
+ atom.target = target;
+ atom.callback = callback;
+ atom.callback_data = callback_data;
+ atom.callback_data_destroy_notify = callback_data_destroy_notify;
+
+ /* Make a single-atom list. */
+ single_atom_list.data = &atom;
+ single_atom_list.next = NULL;
+ single_atom_list.prev = NULL;
+
+ /* Call the full version of the registration function,
+ * using the undo target as the place to search for the
+ * undo manager.
+ */
+ caja_undo_register_full (&single_atom_list,
+ target,
+ operation_name,
+ undo_menu_item_label,
+ undo_menu_item_hint,
+ redo_menu_item_label,
+ redo_menu_item_hint);
+}
+
+/* Register an undo action. */
+void
+caja_undo_register_full (GList *atoms,
+ GObject *undo_manager_search_start_object,
+ const char *operation_name,
+ const char *undo_menu_item_label,
+ const char *undo_menu_item_hint,
+ const char *redo_menu_item_label,
+ const char *redo_menu_item_hint)
+{
+ CajaUndoTransaction *transaction;
+ GList *p;
+
+ g_return_if_fail (atoms != NULL);
+ g_return_if_fail (G_IS_OBJECT (undo_manager_search_start_object));
+
+ /* Create an undo transaction */
+ transaction = caja_undo_transaction_new (operation_name,
+ undo_menu_item_label,
+ undo_menu_item_hint,
+ redo_menu_item_label,
+ redo_menu_item_hint);
+ for (p = atoms; p != NULL; p = p->next)
+ {
+ caja_undo_transaction_add_atom (transaction, p->data);
+ }
+ caja_undo_transaction_add_to_undo_manager
+ (transaction,
+ caja_undo_get_undo_manager (undo_manager_search_start_object));
+
+ /* Now we are done with the transaction.
+ * If the undo manager is holding it, then this will not destroy it.
+ */
+ g_object_unref (transaction);
+}
+
+/* Cover for forgetting about all undo relating to a particular target. */
+void
+caja_undo_unregister (GObject *target)
+{
+ /* Perhaps this should also unregister all children if called on a
+ * GtkContainer? That might be handy.
+ */
+ caja_undo_transaction_unregister_object (target);
+}
+
+void
+caja_undo (GObject *undo_manager_search_start_object)
+{
+ CajaUndoManager *manager;
+
+ g_return_if_fail (G_IS_OBJECT (undo_manager_search_start_object));
+
+ manager = caja_undo_get_undo_manager (undo_manager_search_start_object);
+ if (manager != NULL)
+ {
+ caja_undo_manager_undo (manager);
+ }
+}
+
+CajaUndoManager *
+caja_undo_get_undo_manager (GObject *start_object)
+{
+ CajaUndoManager *manager;
+ GtkWidget *parent;
+ GtkWindow *transient_parent;
+
+ if (start_object == NULL)
+ {
+ return NULL;
+ }
+
+ g_return_val_if_fail (G_IS_OBJECT (start_object), NULL);
+
+ /* Check for an undo manager right here. */
+ manager = g_object_get_data (start_object, CAJA_UNDO_MANAGER_DATA);
+ if (manager != NULL)
+ {
+ return manager;
+ }
+
+ /* Check for undo manager up the parent chain. */
+ if (GTK_IS_WIDGET (start_object))
+ {
+ parent = gtk_widget_get_parent (GTK_WIDGET (start_object));
+ if (parent != NULL)
+ {
+ manager = caja_undo_get_undo_manager (G_OBJECT (parent));
+ if (manager != NULL)
+ {
+ return manager;
+ }
+ }
+
+ /* Check for undo manager in our window's parent. */
+ if (GTK_IS_WINDOW (start_object))
+ {
+ transient_parent = gtk_window_get_transient_for (GTK_WINDOW (start_object));
+ if (transient_parent != NULL)
+ {
+ manager = caja_undo_get_undo_manager (G_OBJECT (transient_parent));
+ if (manager != NULL)
+ {
+ return manager;
+ }
+ }
+ }
+ }
+
+ /* Found nothing. I can live with that. */
+ return NULL;
+}
+
+void
+caja_undo_attach_undo_manager (GObject *object,
+ CajaUndoManager *manager)
+{
+ g_return_if_fail (G_IS_OBJECT (object));
+
+ if (manager == NULL)
+ {
+ g_object_set_data (object, CAJA_UNDO_MANAGER_DATA, NULL);
+ }
+ else
+ {
+ g_object_ref (manager);
+ g_object_set_data_full
+ (object, CAJA_UNDO_MANAGER_DATA,
+ manager, g_object_unref);
+ }
+}
+
+/* Copy a reference to the undo manager fromone object to another. */
+void
+caja_undo_share_undo_manager (GObject *destination_object,
+ GObject *source_object)
+{
+ CajaUndoManager *manager;
+
+ manager = caja_undo_get_undo_manager (source_object);
+ caja_undo_attach_undo_manager (destination_object, manager);
+}
author	Perberos <[email protected]>	2011-12-01 22:24:23 -0300
committer	Perberos <[email protected]>	2011-12-01 22:24:23 -0300
commit	0e004c696b0e68b2cff37a4c3315b022a35eaf43 (patch)
tree	43261e815529cb9518ed7be37af13b846af8b26b /libcaja-private/caja-undo.c
download	caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.bz2 caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.xz