diff options
Diffstat (limited to 'libcaja-private/caja-undo-manager.c')
| -rw-r--r-- | libcaja-private/caja-undo-manager.c | 320 |
1 files changed, 0 insertions, 320 deletions
diff --git a/libcaja-private/caja-undo-manager.c b/libcaja-private/caja-undo-manager.c deleted file mode 100644 index 8f999dd0..00000000 --- a/libcaja-private/caja-undo-manager.c +++ /dev/null @@ -1,320 +0,0 @@ -/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */ - -/* CajaUndoManager - Undo/Redo transaction manager. - * - * 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., 51 Franklin St, Fifth Floor, - * Boston, MA 02110-1301, USA. - */ - -#include <config.h> -#include <libcaja-private/caja-undo-manager.h> -#include <libcaja-private/caja-undo-transaction.h> - -#include <eel/eel-gtk-macros.h> -#include <eel/eel-gtk-extensions.h> -#include <gtk/gtk.h> -#include "caja-undo-private.h" - -struct CajaUndoManagerDetails -{ - CajaUndoTransaction *transaction; - - /* These are used to tell undo from redo. */ - gboolean current_transaction_is_redo; - gboolean new_transaction_is_redo; - - /* These are used only so that we can complain if we get more - * than one transaction inside undo. - */ - gboolean undo_in_progress; - int num_transactions_during_undo; -}; - -enum -{ - CHANGED, - LAST_SIGNAL -}; -static guint signals[LAST_SIGNAL]; - -typedef struct -{ -#ifdef UIH - MateComponentUIHandler *handler; -#endif /* UIH */ - char *path; - char *no_undo_menu_item_label; - char *no_undo_menu_item_hint; -} UndoMenuHandlerConnection; - -G_DEFINE_TYPE (CajaUndoManager, - caja_undo_manager, - G_TYPE_OBJECT) - -static void -release_transaction (CajaUndoManager *manager) -{ - CajaUndoTransaction *transaction; - - transaction = manager->details->transaction; - manager->details->transaction = NULL; - if (transaction != NULL) - { - g_object_unref (transaction); - } -} - -void -caja_undo_manager_append (CajaUndoManager *manager, - CajaUndoTransaction *transaction) -{ - CajaUndoTransaction *duplicate_transaction; - - /* Check, complain, and ignore the passed-in transaction if we - * get more than one within a single undo operation. The single - * transaction we get during the undo operation is supposed to - * be the one for redoing the undo (or re-undoing the redo). - */ - if (manager->details->undo_in_progress) - { - manager->details->num_transactions_during_undo += 1; - g_return_if_fail (manager->details->num_transactions_during_undo == 1); - } - - g_return_if_fail (transaction != NULL); - - /* Keep a copy of this transaction (dump the old one). */ - duplicate_transaction = g_object_ref (transaction); - release_transaction (manager); - manager->details->transaction = duplicate_transaction; - manager->details->current_transaction_is_redo = - manager->details->new_transaction_is_redo; - - /* Fire off signal indicating that the undo state has changed. */ - g_signal_emit (manager, signals[CHANGED], 0); -} - -void -caja_undo_manager_forget (CajaUndoManager *manager, - CajaUndoTransaction *transaction) -{ - /* Nothing to forget unless the item we are passed is the - * transaction we are currently holding. - */ - if (transaction != manager->details->transaction) - { - return; - } - - /* Get rid of the transaction we are holding on to. */ - release_transaction (manager); - - /* Fire off signal indicating that the undo state has changed. */ - g_signal_emit (manager, signals[CHANGED], 0); -} - -CajaUndoManager * -caja_undo_manager_new (void) -{ - return CAJA_UNDO_MANAGER (g_object_new (caja_undo_manager_get_type (), NULL)); -} - -static void -caja_undo_manager_init (CajaUndoManager *manager) -{ - manager->details = g_new0 (CajaUndoManagerDetails, 1); -} - -void -caja_undo_manager_undo (CajaUndoManager *manager) -{ - CajaUndoTransaction *transaction; - - g_return_if_fail (CAJA_IS_UNDO_MANAGER (manager)); - - transaction = manager->details->transaction; - manager->details->transaction = NULL; - if (transaction != NULL) - { - /* Perform the undo. New transactions that come in - * during an undo are redo transactions. New - * transactions that come in during a redo are undo - * transactions. Transactions that come in outside - * are always undo and never redo. - */ - manager->details->new_transaction_is_redo = - !manager->details->current_transaction_is_redo; - manager->details->undo_in_progress = TRUE; - manager->details->num_transactions_during_undo = 0; - caja_undo_transaction_undo (transaction); - manager->details->undo_in_progress = FALSE; - manager->details->new_transaction_is_redo = FALSE; - - /* Let go of the transaction. */ - g_object_unref (transaction); - - /* Fire off signal indicating the undo state has changed. */ - g_signal_emit (manager, signals[CHANGED], 0); - } -} - -static void -finalize (GObject *object) -{ - CajaUndoManager *manager; - - manager = CAJA_UNDO_MANAGER (object); - - release_transaction (manager); - - g_free (manager->details); - - if (G_OBJECT_CLASS (caja_undo_manager_parent_class)->finalize) - { - (* G_OBJECT_CLASS (caja_undo_manager_parent_class)->finalize) (object); - } -} - -void -caja_undo_manager_attach (CajaUndoManager *manager, GObject *target) -{ - g_return_if_fail (CAJA_IS_UNDO_MANAGER (manager)); - g_return_if_fail (G_IS_OBJECT (target)); - - caja_undo_attach_undo_manager (G_OBJECT (target), manager); -} - -#ifdef UIH -static void -update_undo_menu_item (CajaUndoManager *manager, - UndoMenuHandlerConnection *connection) -{ - CORBA_Environment ev; - Caja_Undo_MenuItem *menu_item; - - g_assert (CAJA_IS_UNDO_MANAGER (manager)); - g_assert (connection != NULL); - g_assert (MATECOMPONENT_IS_UI_HANDLER (connection->handler)); - g_assert (connection->path != NULL); - g_assert (connection->no_undo_menu_item_label != NULL); - g_assert (connection->no_undo_menu_item_hint != NULL); - - CORBA_exception_init (&ev); - - if (CORBA_Object_is_nil (manager->details->transaction, &ev)) - { - menu_item = NULL; - } - else - { - if (manager->details->current_transaction_is_redo) - { - menu_item = Caja_Undo_Transaction__get_redo_menu_item - (manager->details->transaction, &ev); - } - else - { - menu_item = Caja_Undo_Transaction__get_undo_menu_item - (manager->details->transaction, &ev); - } - } - - matecomponent_ui_handler_menu_set_sensitivity - (connection->handler, connection->path, - menu_item != NULL); - matecomponent_ui_handler_menu_set_label - (connection->handler, connection->path, - menu_item == NULL - ? connection->no_undo_menu_item_label - : menu_item->label); - matecomponent_ui_handler_menu_set_hint - (connection->handler, connection->path, - menu_item == NULL - ? connection->no_undo_menu_item_hint - : menu_item->hint); - - CORBA_free (menu_item); - - CORBA_exception_free (&ev); -} - -static void -undo_menu_handler_connection_free (UndoMenuHandlerConnection *connection) -{ - g_assert (connection != NULL); - g_assert (MATECOMPONENT_IS_UI_HANDLER (connection->handler)); - g_assert (connection->path != NULL); - g_assert (connection->no_undo_menu_item_label != NULL); - g_assert (connection->no_undo_menu_item_hint != NULL); - - g_free (connection->path); - g_free (connection->no_undo_menu_item_label); - g_free (connection->no_undo_menu_item_hint); - g_free (connection); -} - -static void -undo_menu_handler_connection_free_cover (gpointer data) -{ - undo_menu_handler_connection_free (data); -} - -void -caja_undo_manager_set_up_matecomponent_ui_handler_undo_item (CajaUndoManager *manager, - MateComponentUIHandler *handler, - const char *path, - const char *no_undo_menu_item_label, - const char *no_undo_menu_item_hint) -{ - UndoMenuHandlerConnection *connection; - - connection = g_new (UndoMenuHandlerConnection, 1); - connection->handler = handler; - connection->path = g_strdup (path); - connection->no_undo_menu_item_label = g_strdup (no_undo_menu_item_label); - connection->no_undo_menu_item_hint = g_strdup (no_undo_menu_item_hint); - - /* Set initial state of menu item. */ - update_undo_menu_item (manager, connection); - - /* Update it again whenever the changed signal is emitted. */ - eel_gtk_signal_connect_full_while_alive - (GTK_OBJECT (manager), "changed", - G_CALLBACK (update_undo_menu_item), NULL, - connection, undo_menu_handler_connection_free_cover, - FALSE, FALSE, - GTK_OBJECT (handler)); -} -#endif /* UIH */ - -static void -caja_undo_manager_class_init (CajaUndoManagerClass *class) -{ - G_OBJECT_CLASS (class)->finalize = finalize; - - signals[CHANGED] = g_signal_new - ("changed", - G_TYPE_FROM_CLASS (class), - G_SIGNAL_RUN_LAST, - G_STRUCT_OFFSET (CajaUndoManagerClass, - changed), - NULL, NULL, - g_cclosure_marshal_VOID__VOID, - G_TYPE_NONE, 0); -} |