1 /*

     2  * Copyright (c) 2003, 2015, Oracle and/or its affiliates. All rights reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.  Oracle designates this

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

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 package sun.awt.X11;

    27 

    28 import java.awt.Point;

    29 import java.awt.Window;

    30 import java.awt.GraphicsEnvironment;

    31 import java.awt.GraphicsDevice;

    32 import java.awt.peer.MouseInfoPeer;

    33 import sun.awt.X11GraphicsDevice;

    34 

    35 import sun.awt.AWTAccessor;

    36 

    37 public class XMouseInfoPeer implements MouseInfoPeer {

    38 

    39     /**

    40      * Package-private constructor to prevent instantiation.

    41      */

    42     XMouseInfoPeer() {

    43     }

    44 

    45     public int fillPointWithCoords(Point point) {

    46         long display = XToolkit.getDisplay();

    47         GraphicsEnvironment ge = GraphicsEnvironment.

    48                                      getLocalGraphicsEnvironment();

    49         GraphicsDevice[] gds = ge.getScreenDevices();

    50         int gdslen = gds.length;

    51 

    52         XToolkit.awtLock();

    53         try {

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

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

    56                 boolean pointerFound = XlibWrapper.XQueryPointer(

    57                                            display, screenRoot,

    58                                            XlibWrapper.larg1,  // root_return

    59                                            XlibWrapper.larg2,  // child_return

    60                                            XlibWrapper.larg3,  // xr_return

    61                                            XlibWrapper.larg4,  // yr_return

    62                                            XlibWrapper.larg5,  // xw_return

    63                                            XlibWrapper.larg6,  // yw_return

    64                                            XlibWrapper.larg7); // mask_return

    65                 if (pointerFound) {

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

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

    68                     GraphicsDevice device = gds[i];

    69                     if (device instanceof X11GraphicsDevice) {

    70                         int scale = ((X11GraphicsDevice) device).getScaleFactor();

    71                         point.x = XlibUtil.scaleDown(point.x, scale);

    72                         point.y = XlibUtil.scaleDown(point.y, scale);

    73                     }

    74                     return i;

    75                 }

    76             }

    77         } finally {

    78             XToolkit.awtUnlock();

    79         }

    80 

    81         // this should never happen

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

    83         return 0;

    84     }

    85 

    86     @SuppressWarnings("deprecation")

    87     public boolean isWindowUnderMouse(Window w) {

    88 

    89         long display = XToolkit.getDisplay();

    90 

    91         // java.awt.Component.findUnderMouseInWindow checks that

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

    93         // is showing.

    94         XWindow peer = AWTAccessor.getComponentAccessor().getPeer(w);

    95         long contentWindow = peer.getContentWindow();

    96         long parent = XlibUtil.getParentWindow(contentWindow);

    97 

    98         XToolkit.awtLock();

    99         try

   100         {

   101             boolean windowOnTheSameScreen = XlibWrapper.XQueryPointer(display, parent,

   102                                   XlibWrapper.larg1, // root_return

   103                                   XlibWrapper.larg8, // child_return

   104                                   XlibWrapper.larg3, // root_x_return

   105                                   XlibWrapper.larg4, // root_y_return

   106                                   XlibWrapper.larg5, // win_x_return

   107                                   XlibWrapper.larg6, // win_y_return

   108                                   XlibWrapper.larg7); //  mask_return

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

   110             return (siblingWindow == contentWindow && windowOnTheSameScreen);

   111         }

   112         finally

   113         {

   114             XToolkit.awtUnlock();

   115         }

   116     }

   117 }