| /******************************************************************************* |
| * Copyright (c) 2009, 2010 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.xml.ui.internal.projection; |
| |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.wst.sse.core.internal.provisional.IndexedRegion; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion; |
| import org.eclipse.wst.sse.ui.internal.projection.AbstractStructuredFoldingStrategy; |
| import org.eclipse.wst.xml.core.internal.document.CommentImpl; |
| import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode; |
| import org.eclipse.wst.xml.core.internal.provisional.document.IDOMText; |
| |
| |
| /** |
| * A folding strategy for XML type structured documents. |
| * See AbstractStructuredFoldingStrategy for more details. |
| */ |
| public class XMLFoldingStrategy extends AbstractStructuredFoldingStrategy { |
| |
| /** |
| * Create an instance of the folding strategy. |
| * Be sure to set the viewer and document after creation. |
| */ |
| public XMLFoldingStrategy() { |
| super(); |
| } |
| |
| /** |
| * @see org.eclipse.wst.sse.ui.internal.projection.AbstractFoldingStrategy#calcNewFoldPosition(org.eclipse.wst.sse.core.internal.provisional.IndexedRegion) |
| */ |
| protected Position calcNewFoldPosition(IndexedRegion indexedRegion) { |
| Position retPos = null; |
| |
| //only want to fold regions of the valid type and with a valid range |
| if(indexedRegion.getStartOffset() >= 0 && indexedRegion.getLength() >= 0) { |
| IDOMNode node = (IDOMNode)indexedRegion; |
| IStructuredDocumentRegion startRegion = node.getStartStructuredDocumentRegion(); |
| IStructuredDocumentRegion endRegion = node.getEndStructuredDocumentRegion(); |
| |
| //if the node has an endRegion (end tag) then folding region is |
| // between the start and end tag |
| //else if the region is a comment |
| //else if the region is only an open tag or an open/close tag then don't fold it |
| if(startRegion != null && endRegion != null) { |
| retPos = new XMLElementFoldingPosition(startRegion, endRegion); |
| } else if(startRegion != null && indexedRegion instanceof CommentImpl) { |
| retPos = new XMLCommentFoldingPosition(startRegion); |
| } |
| } |
| |
| return retPos; |
| } |
| |
| /** |
| * @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 IDOMNode) && !(indexedRegion instanceof IDOMText); |
| } |
| } |