/*

 * Copyright 2003-2006 Sun Microsystems, Inc.  All Rights Reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun in the LICENSE file that accompanied this code.

 *

 * This code 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 Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.awt.X11;

import java.awt.Point;

import java.awt.Window;

import java.awt.GraphicsEnvironment;

import java.awt.GraphicsConfiguration;

import java.awt.GraphicsDevice;

import java.awt.peer.MouseInfoPeer;

public class XMouseInfoPeer implements MouseInfoPeer {

    /**

     * Package-private constructor to prevent instantiation.

     */

    XMouseInfoPeer() {

    }

    public int fillPointWithCoords(Point point) {

        long display = XToolkit.getDisplay();

        GraphicsEnvironment ge = GraphicsEnvironment.

                                     getLocalGraphicsEnvironment();

        GraphicsDevice[] gds = ge.getScreenDevices();

        int gdslen = gds.length;

        XToolkit.awtLock();

        try {

            for (int i = 0; i < gdslen; i++) {

                long screenRoot = XlibWrapper.RootWindow(display, i);

                boolean pointerFound = XlibWrapper.XQueryPointer(

                                           display, screenRoot,

                                           XlibWrapper.larg1,  // root_return

                                           XlibWrapper.larg2,  // child_return

                                           XlibWrapper.larg3,  // xr_return

                                           XlibWrapper.larg4,  // yr_return

                                           XlibWrapper.larg5,  // xw_return

                                           XlibWrapper.larg6,  // yw_return

                                           XlibWrapper.larg7); // mask_return

                if (pointerFound) {

                    point.x = Native.getInt(XlibWrapper.larg3);

                    point.y = Native.getInt(XlibWrapper.larg4);

                    return i;

                }

            }

        } finally {

            XToolkit.awtUnlock();

        }

        // this should never happen

        assert false : "No pointer found in the system.";

        return 0;

    }

    public boolean isWindowUnderMouse(Window w) {

        long display = XToolkit.getDisplay();

        // java.awt.Component.findUnderMouseInWindow checks that

        // the peer is non-null by checking that the component

        // is showing.

        long contentWindow = ((XWindow)w.getPeer()).getContentWindow();

        long parent = XlibUtil.getParentWindow(contentWindow);

        XToolkit.awtLock();

        try

        {

            boolean windowOnTheSameScreen = XlibWrapper.XQueryPointer(display, parent,

                                  XlibWrapper.larg1, // root_return

                                  XlibWrapper.larg8, // child_return

                                  XlibWrapper.larg3, // root_x_return

                                  XlibWrapper.larg4, // root_y_return

                                  XlibWrapper.larg5, // win_x_return

                                  XlibWrapper.larg6, // win_y_return

                                  XlibWrapper.larg7); //  mask_return

            long siblingWindow = Native.getWindow(XlibWrapper.larg8);

            return (siblingWindow == contentWindow && windowOnTheSameScreen);

        }

        finally

        {

            XToolkit.awtUnlock();

        }

    }

}