1 /*
   2  * Copyright (c) 2011, 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.lwawt.macosx;
  27 
  28 import sun.lwawt.LWCursorManager;
  29 
  30 import java.awt.Cursor;
  31 import java.awt.Point;
  32 import java.awt.geom.Point2D;
  33 
  34 final class CCursorManager extends LWCursorManager {
  35 
  36     private static native Point2D nativeGetCursorPosition();
  37     private static native void nativeSetBuiltInCursor(final int type, final String name);
  38     private static native void nativeSetCustomCursor(final long imgPtr, final double x, final double y);
  39     public static native void nativeSetAllowsCursorSetInBackground(final boolean allows);
  40 
  41     private static final int NAMED_CURSOR = -1;
  42 
  43     private static final CCursorManager theInstance = new CCursorManager();
  44     public static CCursorManager getInstance() {
  45         return theInstance;
  46     }
  47 
  48     private volatile Cursor currentCursor;
  49 
  50     private CCursorManager() { }
  51 
  52     @Override
  53     protected Point getCursorPosition() {
  54         final Point2D nativePosition = nativeGetCursorPosition();
  55         return new Point((int)nativePosition.getX(), (int)nativePosition.getY());
  56     }
  57 
  58     @Override
  59     protected void setCursor(final Cursor cursor) {
  60         if (cursor == currentCursor) {
  61             return;
  62         }
  63         currentCursor = cursor;
  64 
  65         if (cursor == null) {
  66             nativeSetBuiltInCursor(Cursor.DEFAULT_CURSOR, null);
  67             return;
  68         }
  69 
  70         if (cursor instanceof CCustomCursor) {
  71             final CCustomCursor customCursor = (CCustomCursor) cursor;
  72             final long imagePtr = customCursor.getImageData();
  73             if (imagePtr != 0L) {
  74                 final Point hotSpot = customCursor.getHotSpot();
  75                 nativeSetCustomCursor(imagePtr, hotSpot.x, hotSpot.y);
  76             }
  77             return;
  78         }
  79 
  80         final int type = cursor.getType();
  81         if (type != Cursor.CUSTOM_CURSOR) {
  82             nativeSetBuiltInCursor(type, null);
  83             return;
  84         }
  85 
  86         final String name = cursor.getName();
  87         if (name != null) {
  88             nativeSetBuiltInCursor(NAMED_CURSOR, name);
  89             return;
  90         }
  91 
  92         // do something special
  93         throw new RuntimeException("Unimplemented");
  94     }
  95 }