/*
    GNU GENERAL LICENSE
    Copyright (C) 2006 The Lobo Project. Copyright (C) 2014 - 2017 Lobo Evolution

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public
    License as published by the Free Software Foundation; either
    verion 3 of the License, or (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General License for more details.

    You should have received a copy of the GNU General Public
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
    

    Contact info: lobochief@users.sourceforge.net; ivan.difrancesco@yahoo.it
 */
package org.lobobrowser.html.js;

import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;

import org.lobobrowser.js.AbstractScriptableDelegate;

/**
 * The Class Screen.
 */
public class Screen extends AbstractScriptableDelegate {

    /** The graphics environment. */
    private final GraphicsEnvironment graphicsEnvironment;

    /** The graphics device. */
    private final GraphicsDevice graphicsDevice;

    /**
     * Instantiates a new screen.
     */
    Screen() {
        super();
        if (GraphicsEnvironment.isHeadless()) {
            this.graphicsEnvironment = null;
            this.graphicsDevice = null;
        } else {
            this.graphicsEnvironment = GraphicsEnvironment
                    .getLocalGraphicsEnvironment();
            this.graphicsDevice = this.graphicsEnvironment
                    .getDefaultScreenDevice();
        }
    }

    /** Gets the height.
	 *
	 * @return the height
	 */
    public int getHeight() {
        GraphicsDevice gd = this.graphicsDevice;
        return gd == null ? 0 : gd.getDisplayMode().getHeight();
    }

    /** Gets the pixel depth.
	 *
	 * @return the pixel depth
	 */
    public int getPixelDepth() {
        return this.getColorDepth();
    }

    /** Gets the width.
	 *
	 * @return the width
	 */
    public int getWidth() {
        GraphicsEnvironment ge = this.graphicsEnvironment;
        if (ge == null) {
            return 0;
        }
        GraphicsDevice gd = ge.getDefaultScreenDevice();
        return gd.getDisplayMode().getWidth();
    }

    /** Gets the avail height.
	 *
	 * @return the avail height
	 */
    public int getAvailHeight() {
        GraphicsEnvironment ge = this.graphicsEnvironment;
        if (ge == null) {
            return 0;
        }
        return ge.getMaximumWindowBounds().height;
    }

    /** Gets the avail width.
	 *
	 * @return the avail width
	 */
    public int getAvailWidth() {
        GraphicsEnvironment ge = this.graphicsEnvironment;
        if (ge == null) {
            return 0;
        }
        return ge.getMaximumWindowBounds().width;
    }

    /** Gets the color depth.
	 *
	 * @return the color depth
	 */
    public int getColorDepth() {
        GraphicsDevice gd = this.graphicsDevice;
        if (gd == null) {
            return 0;
        }
        return gd.getDisplayMode().getBitDepth();
    }
}