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/* -*- Mode: IDL; tab-width: 8; indent-tabs-mode: 8; c-basic-offset: 8 -*- */
/* nautilus-undo.idl - Interface for view components that
* support undo, used internally by the
* undo support classes.
*
* 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.
*/
#ifndef NAUTILUS_UNDO_IDL_INCLUDED
#define NAUTILUS_UNDO_IDL_INCLUDED
#include <Bonobo.idl>
module Nautilus {
module Undo {
/* The specifications for a menu item. */
struct MenuItem {
string label;
string hint;
};
/* A single undoable operation is represented by a
* transaction. This is the interface a transaction
* must supply for use by an undo manager.
*/
interface Transaction : ::Bonobo::Unknown {
/* These menu items are used to display undo
* or redo menu items for this transaction.
* The operation name is for lists of undoable
* operations that are listed somewhere other
* than an undo or redo object.
*/
readonly attribute MenuItem undo_menu_item;
readonly attribute MenuItem redo_menu_item;
readonly attribute string operation_name;
/* Here's how you actually perform an undo.
* Once it's performed, calling this again is
* safe; it's guaranteed to do nothing.
*/
void undo ();
};
/* An undo manager deals with a list of transactions
* for a particular application or window. This is the
* interface of the manager from the transaction's
* point of view only.
*/
interface Manager : ::Bonobo::Unknown {
/* Add a new transaction. This is normally called
* by the code that creates the transaction.
*/
void append (in Transaction transaction);
/* Forget a transaction. This is typically called
* when the operation that the transaction does
* undo for no longer makes sense.
*/
void forget (in Transaction transaction);
/* Sometimes an undo has to be "forced" from the
* client side when it recognizes an undo key
* equivalent.
*/
void undo ();
/* FIXME bugzilla.gnome.org 41292:
* We may need additional interface so the
* client can include an appropriate undo item in
* a contextual menu.
*/
};
/* To locate the appropriate manager, a view component
* can query for this interface on its Bonobo control
* frame. This is done automatically by functions in
* the undo manager.
*/
interface Context : ::Bonobo::Unknown {
readonly attribute Manager undo_manager;
};
};
};
#endif /* NAUTILUS_UNDO_IDL_INCLUDED */
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