1 /*
   2  * Copyright (c) 2016, 2018, 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 com.sun.javafx.scene;
  27 
  28 import com.sun.javafx.geom.BaseBounds;
  29 import com.sun.javafx.geom.transform.BaseTransform;
  30 import com.sun.javafx.sg.prism.NGNode;
  31 import com.sun.javafx.util.Utils;
  32 import javafx.scene.LightBase;
  33 import javafx.scene.Node;
  34 
  35 /**
  36  * Used to access internal methods of LightBase.
  37  */
  38 public class LightBaseHelper extends NodeHelper {
  39 
  40     private static final LightBaseHelper theInstance;
  41     private static LightBaseAccessor lightBaseAccessor;
  42 
  43     static {
  44         theInstance = new LightBaseHelper();
  45         Utils.forceInit(LightBase.class);
  46     }
  47 
  48     private static LightBaseHelper getInstance() {
  49         return theInstance;
  50     }
  51 
  52     public static void initHelper(LightBase lightBase) {
  53         setHelper(lightBase, getInstance());
  54     }
  55 
  56     @Override
  57     protected NGNode createPeerImpl(Node node) {
  58         throw new UnsupportedOperationException("Applications should not extend the LightBase class directly.");
  59     }
  60 
  61     @Override
  62     protected void updatePeerImpl(Node node) {
  63         super.updatePeerImpl(node);
  64         lightBaseAccessor.doUpdatePeer(node);
  65     }
  66 
  67     @Override
  68     protected void markDirtyImpl(Node node, DirtyBits dirtyBit) {
  69         super.markDirtyImpl(node, dirtyBit);
  70         lightBaseAccessor.doMarkDirty(node, dirtyBit);
  71     }
  72 
  73     @Override
  74     protected BaseBounds computeGeomBoundsImpl(Node node, BaseBounds bounds,
  75             BaseTransform tx) {
  76         return lightBaseAccessor.doComputeGeomBounds(node, bounds, tx);
  77     }
  78 
  79     @Override
  80     protected boolean computeContainsImpl(Node node, double localX, double localY) {
  81         return lightBaseAccessor.doComputeContains(node, localX, localY);
  82     }
  83 
  84     public static void setLightBaseAccessor(final LightBaseAccessor newAccessor) {
  85         if (lightBaseAccessor != null) {
  86             throw new IllegalStateException();
  87         }
  88 
  89         lightBaseAccessor = newAccessor;
  90     }
  91 
  92     public interface LightBaseAccessor {
  93         void doMarkDirty(Node node, DirtyBits dirtyBit);
  94         void doUpdatePeer(Node node);
  95         BaseBounds doComputeGeomBounds(Node node, BaseBounds bounds, BaseTransform tx);
  96         boolean doComputeContains(Node node, double localX, double localY);
  97     }
  98 
  99 }