| /******************************************************************************* |
| * Copyright (c) 2009 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.dtd.ui.internal.projection; |
| |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.wst.dtd.core.internal.DTDNode; |
| import org.eclipse.wst.dtd.core.internal.Unrecognized; |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.ui.internal.projection.AbstractStructuredFoldingStrategy; |
| |
| |
| /** |
| * A folding strategy for DTD structured documents. |
| * See AbstractStructuredFoldingStrategy for more details. |
| * |
| * This strategy is rather lame because the DTD parser does not |
| * create regions for syntax such as <[ ]> so folding on it |
| * can not currently occur. |
| */ |
| public class DTDFoldingStrategy extends AbstractStructuredFoldingStrategy { |
| |
| /** |
| * Create an instance of the folding strategy. |
| * Be sure to set the viewer and document after creation. |
| */ |
| public DTDFoldingStrategy() { |
| super(); |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.wst.sse.ui.internal.projection.AbstractFoldingStrategy#calcNewFoldPosition(org.eclipse.wst.sse.core.internal.provisional.IndexedRegion) |
| */ |
| protected Position calcNewFoldPosition(IndexedRegion indexedRegion) { |
| Position newPos = null; |
| if(indexedRegionValidType(indexedRegion)) { |
| DTDNode node = (DTDNode)indexedRegion; |
| int start = node.getStartOffset(); |
| int length = node.getEndOffset() - start; |
| |
| if(length > 0) { |
| newPos = new Position(start,length); |
| } |
| } |
| return newPos; |
| } |
| |
| /* |
| * (non-Javadoc) |
| * @see org.eclipse.wst.sse.ui.internal.projection.AbstractFoldingStrategy#indexedRegionValidType(org.eclipse.wst.sse.core.internal.provisional.IndexedRegion) |
| */ |
| protected boolean indexedRegionValidType(IndexedRegion indexedRegion) { |
| return (!(indexedRegion instanceof Unrecognized)); |
| } |
| } |