| /******************************************************************************* |
| * Copyright (c) 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.sse.ui.internal.rules; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITypedRegion; |
| import org.eclipse.jface.text.TextPresentation; |
| import org.eclipse.jface.text.rules.DefaultDamagerRepairer; |
| import org.eclipse.jface.text.rules.RuleBasedScanner; |
| import org.eclipse.swt.custom.StyleRange; |
| import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument; |
| import org.eclipse.wst.sse.ui.internal.provisional.style.AbstractLineStyleProvider; |
| import org.eclipse.wst.sse.ui.internal.provisional.style.LineStyleProvider; |
| |
| /** |
| * An implementation of a presentation damager and presentation repairer. |
| * It uses a LineStyleProvider to retrieve the style ranges associated with |
| * the calculated damaged region. |
| * |
| * @see LineStyleProvider |
| */ |
| public class StructuredDocumentDamagerRepairer extends DefaultDamagerRepairer { |
| |
| private LineStyleProvider fProvider = null; |
| |
| public StructuredDocumentDamagerRepairer() { |
| super(new RuleBasedScanner()); |
| } |
| |
| public StructuredDocumentDamagerRepairer(LineStyleProvider provider) { |
| super(new RuleBasedScanner()); |
| fProvider = provider; |
| } |
| |
| public void createPresentation(TextPresentation presentation, ITypedRegion region) { |
| if (fProvider != null) { |
| List styles = new ArrayList(); |
| boolean handled = fProvider.prepareRegions(region, region.getOffset(), region.getLength(), styles); |
| if (handled) { |
| int numberOfStyles = styles.size(); |
| if (numberOfStyles > 0) { |
| StyleRange firstRange = (StyleRange) styles.get(0); |
| StyleRange lastRange = (StyleRange) styles.get(numberOfStyles - 1); |
| |
| /* |
| * Check that the first and last prepared StyleRanges fall |
| * within the requested region |
| */ |
| if (region.getOffset() <= firstRange.start && (lastRange.start + lastRange.length) <= (region.getOffset() + region.getLength())) { |
| for (int i = 0; i < numberOfStyles; i++) { |
| presentation.addStyleRange((StyleRange) styles.get(i)); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| public void setProvider(LineStyleProvider provider) { |
| fProvider = provider; |
| } |
| |
| public void setDocument(IDocument document) { |
| super.setDocument(document); |
| if (fProvider instanceof AbstractLineStyleProvider) |
| ((AbstractLineStyleProvider) fProvider).setDocument( (IStructuredDocument) document); |
| } |
| |
| } |