1 files changed, 343 insertions, 0 deletions
diff --git a/libcaja-private/caja-undo-transaction.c b/libcaja-private/caja-undo-transaction.c
new file mode 100644
index 00000000..b5e1bb40
--- /dev/null
+++ b/libcaja-private/caja-undo-transaction.c
@@ -0,0 +1,343 @@
+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* CajaUndoTransaction - An object for an undoable transaction.
+ * Used internally by undo machinery.
+ * Not public.
+ *
+ * Copyright (C) 2000 Eazel, Inc.
+ *
+ * Author: Gene Z. Ragan <[email protected]>
+ *
+ * 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.
+ */
+
+#include <config.h>
+#include <libcaja-private/caja-undo.h>
+#include <libcaja-private/caja-undo-manager.h>
+#include <libcaja-private/caja-undo-transaction.h>
+
+#include "caja-undo-private.h"
+#include <gtk/gtk.h>
+
+#define CAJA_UNDO_TRANSACTION_LIST_DATA "Caja undo transaction list"
+
+/* undo atoms */
+static void undo_atom_list_free (GList *list);
+static void undo_atom_list_undo_and_free (GList *list);
+
+G_DEFINE_TYPE (CajaUndoTransaction, caja_undo_transaction,
+ G_TYPE_OBJECT);
+
+#ifdef UIH
+static Caja_Undo_MenuItem *
+impl_Caja_Undo_Transaction__get_undo_menu_item (PortableServer_Servant servant,
+ CORBA_Environment *ev)
+{
+ CajaUndoTransaction *transaction;
+ Caja_Undo_MenuItem *item;
+
+ transaction = CAJA_UNDO_TRANSACTION (matecomponent_object_from_servant (servant));
+
+ item = Caja_Undo_MenuItem__alloc ();
+ item->label = CORBA_string_dup (transaction->undo_menu_item_label);
+ item->hint = CORBA_string_dup (transaction->undo_menu_item_hint);
+
+ return item;
+}
+
+static Caja_Undo_MenuItem *
+impl_Caja_Undo_Transaction__get_redo_menu_item (PortableServer_Servant servant,
+ CORBA_Environment *ev)
+{
+ CajaUndoTransaction *transaction;
+ Caja_Undo_MenuItem *item;
+
+ transaction = CAJA_UNDO_TRANSACTION (matecomponent_object_from_servant (servant));
+
+ item = Caja_Undo_MenuItem__alloc ();
+ item->label = CORBA_string_dup (transaction->redo_menu_item_label);
+ item->hint = CORBA_string_dup (transaction->redo_menu_item_hint);
+
+ return item;
+}
+
+static CORBA_char *
+impl_Caja_Undo_Transaction__get_operation_name (PortableServer_Servant servant,
+ CORBA_Environment *ev)
+{
+ CajaUndoTransaction *transaction;
+
+ transaction = CAJA_UNDO_TRANSACTION (matecomponent_object_from_servant (servant));
+ return CORBA_string_dup (transaction->operation_name);
+}
+#endif
+
+
+CajaUndoTransaction *
+caja_undo_transaction_new (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;
+
+ transaction = CAJA_UNDO_TRANSACTION (g_object_new (caja_undo_transaction_get_type (), NULL));
+
+ transaction->operation_name = g_strdup (operation_name);
+ transaction->undo_menu_item_label = g_strdup (undo_menu_item_label);
+ transaction->undo_menu_item_hint = g_strdup (undo_menu_item_hint);
+ transaction->redo_menu_item_label = g_strdup (redo_menu_item_label);
+ transaction->redo_menu_item_hint = g_strdup (redo_menu_item_hint);
+
+ return transaction;
+}
+
+static void
+caja_undo_transaction_init (CajaUndoTransaction *transaction)
+{
+}
+
+static void
+remove_transaction_from_object (gpointer list_data, gpointer callback_data)
+{
+ CajaUndoAtom *atom;
+ CajaUndoTransaction *transaction;
+ GList *list;
+
+ g_assert (list_data != NULL);
+ atom = list_data;
+ transaction = CAJA_UNDO_TRANSACTION (callback_data);
+
+ /* Remove the transaction from the list on the atom. */
+ list = g_object_get_data (atom->target, CAJA_UNDO_TRANSACTION_LIST_DATA);
+
+ if (list != NULL)
+ {
+ list = g_list_remove (list, transaction);
+ g_object_set_data (atom->target, CAJA_UNDO_TRANSACTION_LIST_DATA, list);
+ }
+}
+
+static void
+remove_transaction_from_atom_targets (CajaUndoTransaction *transaction)
+{
+
+ g_list_foreach (transaction->atom_list,
+ remove_transaction_from_object,
+ transaction);
+}
+
+static void
+caja_undo_transaction_finalize (GObject *object)
+{
+ CajaUndoTransaction *transaction;
+
+ transaction = CAJA_UNDO_TRANSACTION (object);
+
+ remove_transaction_from_atom_targets (transaction);
+ undo_atom_list_free (transaction->atom_list);
+
+ g_free (transaction->operation_name);
+ g_free (transaction->undo_menu_item_label);
+ g_free (transaction->undo_menu_item_hint);
+ g_free (transaction->redo_menu_item_label);
+ g_free (transaction->redo_menu_item_hint);
+
+ if (transaction->owner != NULL)
+ {
+ g_object_unref (transaction->owner);
+ }
+
+ G_OBJECT_CLASS (caja_undo_transaction_parent_class)->finalize (object);
+}
+
+void
+caja_undo_transaction_add_atom (CajaUndoTransaction *transaction,
+ const CajaUndoAtom *atom)
+{
+ GList *list;
+
+ g_return_if_fail (CAJA_IS_UNDO_TRANSACTION (transaction));
+ g_return_if_fail (atom != NULL);
+ g_return_if_fail (GTK_IS_OBJECT (atom->target));
+
+ /* Add the atom to the atom list in the transaction. */
+ transaction->atom_list = g_list_append
+ (transaction->atom_list, g_memdup (atom, sizeof (*atom)));
+
+ /* Add the transaction to the list on the atoms target object. */
+ list = g_object_get_data (atom->target, CAJA_UNDO_TRANSACTION_LIST_DATA);
+ if (g_list_find (list, transaction) != NULL)
+ {
+ return;
+ }
+
+ /* If it's not already on that atom, this object is new. */
+ list = g_list_prepend (list, transaction);
+ g_object_set_data (atom->target, CAJA_UNDO_TRANSACTION_LIST_DATA, list);
+
+ /* Connect a signal handler to the atom so it will unregister
+ * itself when it's destroyed.
+ */
+ g_signal_connect (atom->target, "destroy",
+ G_CALLBACK (caja_undo_transaction_unregister_object),
+ NULL);
+}
+
+void
+caja_undo_transaction_undo (CajaUndoTransaction *transaction)
+{
+ g_return_if_fail (CAJA_IS_UNDO_TRANSACTION (transaction));
+
+ remove_transaction_from_atom_targets (transaction);
+ undo_atom_list_undo_and_free (transaction->atom_list);
+
+ transaction->atom_list = NULL;
+}
+
+void
+caja_undo_transaction_add_to_undo_manager (CajaUndoTransaction *transaction,
+ CajaUndoManager *manager)
+{
+ g_return_if_fail (CAJA_IS_UNDO_TRANSACTION (transaction));
+ g_return_if_fail (transaction->owner == NULL);
+
+ if (manager != NULL)
+ {
+ caja_undo_manager_append (manager, transaction);
+ transaction->owner = g_object_ref (manager);
+ }
+}
+
+static void
+remove_atoms (CajaUndoTransaction *transaction,
+ GObject *object)
+{
+ GList *p, *next;
+ CajaUndoAtom *atom;
+
+ g_assert (CAJA_IS_UNDO_TRANSACTION (transaction));
+ g_assert (G_IS_OBJECT (object));
+
+ /* Destroy any atoms for this object. */
+ for (p = transaction->atom_list; p != NULL; p = next)
+ {
+ atom = p->data;
+ next = p->next;
+
+ if (atom->target == object)
+ {
+ transaction->atom_list = g_list_remove_link
+ (transaction->atom_list, p);
+ undo_atom_list_free (p);
+ }
+ }
+
+ /* If all the atoms are gone, forget this transaction.
+ * This may end up freeing the transaction.
+ */
+ if (transaction->atom_list == NULL)
+ {
+ caja_undo_manager_forget (
+ transaction->owner, transaction);
+ }
+}
+
+static void
+remove_atoms_cover (gpointer list_data, gpointer callback_data)
+{
+ if (CAJA_IS_UNDO_TRANSACTION (list_data))
+ {
+ remove_atoms (CAJA_UNDO_TRANSACTION (list_data), G_OBJECT (callback_data));
+ }
+}
+
+void
+caja_undo_transaction_unregister_object (GObject *object)
+{
+ GList *list;
+
+ g_return_if_fail (G_IS_OBJECT (object));
+
+ /* Remove atoms from each transaction on the list. */
+ list = g_object_get_data (object, CAJA_UNDO_TRANSACTION_LIST_DATA);
+ if (list != NULL)
+ {
+ g_list_foreach (list, remove_atoms_cover, object);
+ g_list_free (list);
+ g_object_set_data (object, CAJA_UNDO_TRANSACTION_LIST_DATA, NULL);
+ }
+}
+
+static void
+undo_atom_free (CajaUndoAtom *atom)
+{
+ /* Call the destroy-notify function if it's present. */
+ if (atom->callback_data_destroy_notify != NULL)
+ {
+ (* atom->callback_data_destroy_notify) (atom->callback_data);
+ }
+
+ /* Free the atom storage. */
+ g_free (atom);
+}
+
+static void
+undo_atom_undo_and_free (CajaUndoAtom *atom)
+{
+ /* Call the function that does the actual undo. */
+ (* atom->callback) (atom->target, atom->callback_data);
+
+ /* Get rid of the atom now that it's spent. */
+ undo_atom_free (atom);
+}
+
+static void
+undo_atom_free_cover (gpointer atom, gpointer callback_data)
+{
+ g_assert (atom != NULL);
+ g_assert (callback_data == NULL);
+ undo_atom_free (atom);
+}
+
+static void
+undo_atom_undo_and_free_cover (gpointer atom, gpointer callback_data)
+{
+ g_assert (atom != NULL);
+ g_assert (callback_data == NULL);
+ undo_atom_undo_and_free (atom);
+}
+
+static void
+undo_atom_list_free (GList *list)
+{
+ g_list_foreach (list, undo_atom_free_cover, NULL);
+ g_list_free (list);
+}
+
+static void
+undo_atom_list_undo_and_free (GList *list)
+{
+ g_list_foreach (list, undo_atom_undo_and_free_cover, NULL);
+ g_list_free (list);
+}
+
+static void
+caja_undo_transaction_class_init (CajaUndoTransactionClass *klass)
+{
+ G_OBJECT_CLASS (klass)->finalize = caja_undo_transaction_finalize;
+}