/*******************************************************************************
 * Copyright (c) 2008, 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.sse.ui.internal.rules;

import org.eclipse.core.runtime.Assert;
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.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(LineStyleProvider provider) {
		super(new RuleBasedScanner());
		Assert.isNotNull(provider);
		fProvider = provider;
	}

	public void createPresentation(TextPresentation presentation, ITypedRegion region) {
		PresentationCollector collector = new PresentationCollector(presentation);
		fProvider.prepareRegions(region, region.getOffset(), region.getLength(), collector);
	}
	
	public void setProvider(LineStyleProvider provider) {
		fProvider = provider;
	}
	
	public void setDocument(IDocument document) {
		super.setDocument(document);
		if (fProvider instanceof AbstractLineStyleProvider)
			((AbstractLineStyleProvider) fProvider).setDocument( (IStructuredDocument) document);
	}
	
}