/*
 * JBoss, Home of Professional Open Source.
 *
 * See the LEGAL.txt file distributed with this work for information regarding copyright ownership and licensing.
 *
 * See the AUTHORS.txt file distributed with this work for a full listing of individual contributors.
 */
package org.teiid.designer.ui.common.graphics;

import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
import org.eclipse.swt.widgets.Display;
import org.teiid.designer.ui.common.util.UiUtil;



/**
 * This class provides the Modeler UI plugins a place to cache their required colors, insure there aren't any duplicates
 * ( Based on RGB values), and insure that the colors are Disposed when the UI plugin is shut-down.
 * @since 8.0
 */
public class GlobalUiColorManager {

    private static Map<RGB, Color> fColorTable = Collections.synchronizedMap(new HashMap<RGB, Color>(10));
    
    public static final Color NOTE_COLOR = getSystemColor(SWT.COLOR_DARK_BLUE);
    public static final Color EMPHASIS_COLOR = getSystemColor(SWT.COLOR_DARK_BLUE);
    public static final Color EMPHASIS_COLOR_DISABLED = getSystemColor(SWT.COLOR_WIDGET_NORMAL_SHADOW);
    
    private static Color varColor;

    public static Color getSystemColor(final int colorID) {
    	varColor = null;
    	UiUtil.runInSwtThread(new Runnable() {
			@Override
			public void run() {
				varColor = UiUtil.getSystemColor(colorID);
			}
		}, true);
    	
    	return varColor;
    }
    /**
     * Method disposes of the colors.
     */
    public static void dispose() {
        //int nColors = fColorTable.values().size();
        Iterator<Color> e= fColorTable.values().iterator();
        while (e.hasNext()) {
            e.next().dispose();
        }

        fColorTable.clear();
        //System.out.println(" ModelerUiColorManager.dispose() called.  " + nColors + " Colors disposed");
    }
    /**
     * A getter method that returns a color.
     * @param rgb
     * @return Color
     */
    public static Color getColor(RGB rgb) {
        Color color= fColorTable.get(rgb);
        if (color == null) {
            color= new Color(Display.getCurrent(), rgb);
            //System.out.println(" ModelerUiColorManager.getColor(" + fColorTable.keySet().size()+ ")  Adding New Color = " + rgb );
            fColorTable.put(rgb, color);
        }
        return color;
    }

}