/*******************************************************************************
 * 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.provisional.style;

import org.eclipse.jface.text.ITextViewer;
import org.eclipse.swt.custom.LineStyleEvent;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;

/**
 * https://bugs.eclipse.org/bugs/show_bug.cgi?id=224209
 * 
 * Created to provide compatibility with refreshDisplay() and getTextViewer()
 * methods on the superclass that might be called by LineStyleProviders.
 */
public final class CompatibleHighlighter extends Highlighter {

	private ITextViewer textViewer;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#addProvider(java.lang.String,
	 *      org.eclipse.wst.sse.ui.internal.provisional.style.LineStyleProvider)
	 */
	public void addProvider(String partitionType, LineStyleProvider provider) {
		super.addProvider(partitionType, provider);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#getTextViewer()
	 */
	public ITextViewer getTextViewer() {
		return super.getTextViewer();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#install(org.eclipse.jface.text.ITextViewer)
	 */
	public void install(ITextViewer newTextViewer) {
		textViewer = newTextViewer;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#lineGetStyle(int,
	 *      int)
	 */
	public StyleRange[] lineGetStyle(int eventLineOffset, int eventLineLength) {
		return new StyleRange[0];
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#lineGetStyle(org.eclipse.swt.custom.LineStyleEvent)
	 */
	public void lineGetStyle(LineStyleEvent event) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#refreshDisplay()
	 */
	public void refreshDisplay() {
		if (textViewer != null)
			textViewer.invalidateTextPresentation();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#refreshDisplay(int,
	 *      int)
	 */
	public void refreshDisplay(int start, int length) {
		refreshDisplay();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#removeProvider(java.lang.String)
	 */
	public void removeProvider(String partitionType) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#setDocument(org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument)
	 */
	public void setDocument(IStructuredDocument structuredDocument) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#setDocumentPartitioning(java.lang.String)
	 */
	public void setDocumentPartitioning(String partitioning) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.wst.sse.ui.internal.provisional.style.Highlighter#uninstall()
	 */
	public void uninstall() {
		super.uninstall();
		textViewer = null;
	}
}