/*******************************************************************************
 * Copyright (c) 2014, 2015 Cisco Systems, Inc. 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
 *  
 *******************************************************************************/
package com.cisco.yangide.editor.editors.text;

import org.eclipse.core.resources.IMarker;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.IAnnotationPresentation;
import org.eclipse.jface.text.source.ImageUtilities;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.ui.texteditor.MarkerAnnotation;

import com.cisco.yangide.ui.internal.IYangUIConstants;
import com.cisco.yangide.ui.internal.YangUIImages;

/**
 * @author Konstantin Zaitsev
 * @date Jul 10, 2014
 */
public class YangMarkerAnnotation extends MarkerAnnotation implements IAnnotationPresentation {
    public static final String TYPE = "com.cisco.yangide.core.error";

    public YangMarkerAnnotation(IMarker marker) {
        super(marker);
    }

    public Position getPosition() {
        IMarker marker = getMarker();
        int startPos = marker.getAttribute(IMarker.CHAR_START, -1);
        int endPos = marker.getAttribute(IMarker.CHAR_END, -1);
        if (startPos != -1 && endPos != -1) {
            return new Position(startPos, endPos - startPos);
        }
        return null;
    }

    @Override
    public void paint(GC gc, Canvas canvas, Rectangle r) {
        Image image = YangUIImages.getImage(isMarkedDeleted() ? IYangUIConstants.IMG_ERROR_MARKER_ALT
                : IYangUIConstants.IMG_ERROR_MARKER);
        ImageUtilities.drawImage(image, gc, canvas, r, SWT.CENTER, SWT.TOP);
    }
}