Mercurial > projects > dwt-addons
view dwtx/text/undo/DocumentUndoManagerRegistry.d @ 139:93a6ec48fd28
Regexp throws removal in interfaces
author | Frank Benoit <benoit@tionex.de> |
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date | Sun, 24 Aug 2008 02:31:41 +0200 |
parents | 51e6e63f930e |
children | f70d9508c95c |
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/******************************************************************************* * Copyright (c) 2000, 2008 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.text.undo.DocumentUndoManagerRegistry; import dwtx.text.undo.DocumentUndoManager; // packageimport import dwtx.text.undo.DocumentUndoEvent; // packageimport import dwtx.text.undo.IDocumentUndoListener; // packageimport import dwtx.text.undo.UndoMessages; // packageimport import dwtx.text.undo.IDocumentUndoManager; // packageimport import dwt.dwthelper.utils; import java.util.HashMap; import java.util.Map; import dwtx.core.runtime.Assert; import dwtx.jface.text.IDocument; /** * This document undo manager registry provides access to a document's * undo manager. In order to connect a document a document undo manager * call <code>connect</code>. After that call has successfully completed * undo manager can be obtained via <code>getDocumentUndoManager</code>. * The undo manager is created on the first connect and disposed on the last * disconnect, i.e. this registry keeps track of how often a undo manager is * connected and returns the same undo manager to each client as long as the * document is connected. * <p> * <em>The recoding of changes starts with the first {@link #connect(IDocument)}.</em></p> * * @since 3.2 * @noinstantiate This class is not intended to be instantiated by clients. */ public final class DocumentUndoManagerRegistry { private static final class Record { public this(IDocument document) { count= 0; undoManager= new DocumentUndoManager(document); } private int count; private IDocumentUndoManager undoManager; } private static Map fgFactory= new HashMap(); private this() { // Do not instantiate } /** * Connects the file at the given location to this manager. After that call * successfully completed it is guaranteed that each call to <code>getFileBuffer</code> * returns the same file buffer until <code>disconnect</code> is called. * <p> * <em>The recoding of changes starts with the first {@link #connect(IDocument)}.</em></p> * * @param document the document to be connected */ public static synchronized void connect(IDocument document) { Assert.isNotNull(document); Record record= cast(Record)fgFactory.get(document); if (record is null) { record= new Record(document); fgFactory.put(document, record); } record.count++; } /** * Disconnects the given document from this registry. * * @param document the document to be disconnected */ public static synchronized void disconnect(IDocument document) { Assert.isNotNull(document); Record record= cast(Record)fgFactory.get(document); record.count--; if (record.count is 0) fgFactory.remove(document); } /** * Returns the file buffer managed for the given location or <code>null</code> * if there is no such file buffer. * <p> * The provided location is either a full path of a workspace resource or * an absolute path in the local file system. The file buffer manager does * not resolve the location of workspace resources in the case of linked * resources. * </p> * * @param document the document for which to get its undo manager * @return the document undo manager or <code>null</code> */ public static synchronized IDocumentUndoManager getDocumentUndoManager(IDocument document) { Assert.isNotNull(document); Record record= cast(Record)fgFactory.get(document); if (record is null) return null; return record.undoManager; } }