/*******************************************************************************
 * Copyright (c) 2004-2008 Istvan Rath and Daniel Varro
 * 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:
 *    Istvan Rath - initial API and implementation
 *******************************************************************************/

 package org.eclipse.viatra2.editor.text.light.vtcl;

import java.util.Iterator;

import org.eclipse.core.resources.IMarker;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.viatra2.editor.text.Activator;
import org.eclipse.viatra2.editor.text.light.IVTEConstants;
import org.eclipse.viatra2.editor.text.light.VTEAutoIndentStrategy;
import org.eclipse.viatra2.editor.text.light.VTEColorProvider;
import org.eclipse.viatra2.editor.text.light.VTEColorToken;
import org.eclipse.jface.text.IAutoEditStrategy;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.jface.text.presentation.IPresentationReconciler;
import org.eclipse.jface.text.presentation.PresentationReconciler;
import org.eclipse.jface.text.rules.DefaultDamagerRepairer;
import org.eclipse.jface.text.rules.Token;
import org.eclipse.jface.text.source.IAnnotationHover;
import org.eclipse.jface.text.source.ISourceViewer;
import org.eclipse.jface.text.source.SourceViewerConfiguration;
import org.eclipse.swt.SWT;
import org.eclipse.ui.texteditor.MarkerAnnotation;

public class VTCLConfiguration extends SourceViewerConfiguration 
{

	private VTCLCodeScanner iCodeScanner = null;
	private VTEColorProvider iColorProvider = null;
	private VTEColorToken iColorToken = null; 
	
	@SuppressWarnings("static-access")
	public VTCLConfiguration(VTEColorProvider cm) 
	{
		iColorProvider = cm;
		iColorProvider.initializeDefaults(Activator.getDefault().getPreferenceStore());
		iColorToken = new VTEColorToken();
		iColorToken.COMMENT = new Token(new TextAttribute(iColorProvider.getColor(IVTEConstants.COMMENT),null,SWT.ITALIC));
		iColorToken.KEYWORD = new Token(new TextAttribute(iColorProvider.getColor(IVTEConstants.KEYWORD),null,SWT.BOLD));
		iColorToken.STRING = new Token(new TextAttribute(iColorProvider.getColor(IVTEConstants.STRING)));
		iColorToken.OTHER = new Token(new TextAttribute(iColorProvider.getColor(IVTEConstants.DEFAULT)));
		iCodeScanner = new VTCLCodeScanner(iColorProvider,iColorToken);
	}

	/**
	 * Define reconciler for VTMLEditor
	 */
	public IPresentationReconciler getPresentationReconciler(ISourceViewer sourceViewer) {
		PresentationReconciler reconciler = new PresentationReconciler();
		DefaultDamagerRepairer dr = new DefaultDamagerRepairer(iCodeScanner);
		reconciler.setDamager(dr, IDocument.DEFAULT_CONTENT_TYPE);
		reconciler.setRepairer(dr, IDocument.DEFAULT_CONTENT_TYPE);
		return reconciler;
	}
	
	@Override
	public IAutoEditStrategy[] getAutoEditStrategies(ISourceViewer sourceViewer, String contentType) 
	{
		return new IAutoEditStrategy[]{new VTEAutoIndentStrategy()};
	}
	
	@Override
	public IAnnotationHover getAnnotationHover(ISourceViewer sourceViewer) 
	{
		return new IAnnotationHover() {

			public String getHoverInfo(ISourceViewer sourceViewer,int lineNumber) {
				String r = "Problems:\n";
				Iterator<?> it = sourceViewer.getAnnotationModel().getAnnotationIterator();
				while (it.hasNext())
				{
					Object o = it.next();
					if (o instanceof MarkerAnnotation)
					{
						MarkerAnnotation ann = (MarkerAnnotation)o;
						try
						{
							int line =  (Integer) ann.getMarker().getAttribute(IMarker.LINE_NUMBER);
							if (line == lineNumber || line == lineNumber-1 || line == lineNumber+1) // no comment...
							{
								r+=" - "+ann.getText()+"\n";
							}
						}
						catch (CoreException e) { }
					}
				}
				return r;
			}
			
		};
	}

}