1 /*
   2  * Copyright (c) 2016, 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.PickRay;
  30 import com.sun.javafx.geom.transform.BaseTransform;
  31 import com.sun.javafx.jmx.MXNodeAlgorithm;
  32 import com.sun.javafx.jmx.MXNodeAlgorithmContext;
  33 import com.sun.javafx.scene.input.PickResultChooser;
  34 import com.sun.javafx.scene.traversal.ParentTraversalEngine;
  35 import com.sun.javafx.sg.prism.NGNode;
  36 import com.sun.javafx.util.Utils;
  37 import java.util.List;
  38 import javafx.scene.Node;
  39 import javafx.scene.Parent;
  40 
  41 /*
  42  * Used to access internal methods of Parent.
  43  * Note: ParentHelper needs to be a concrete class even though Parent is an
  44  * abstract class since user is allowed to subclass Parent.
  45  */
  46 public class ParentHelper extends NodeHelper {
  47 
  48     private static final ParentHelper theInstance;
  49     private static ParentAccessor parentAccessor;
  50 
  51     static {
  52         theInstance = new ParentHelper();
  53         Utils.forceInit(Parent.class);
  54     }
  55 
  56     private static ParentHelper getInstance() {
  57         return theInstance;
  58     }
  59 
  60     public static void initHelper(Parent parent) {
  61         setHelper(parent, getInstance());
  62     }
  63 
  64     public static void superProcessCSS(Node node) {
  65         ((ParentHelper) getHelper(node)).superProcessCSSImpl(node);
  66     }
  67 
  68     @Override
  69     protected NGNode createPeerImpl(Node node) {
  70         return parentAccessor.doCreatePeer(node);
  71     }
  72 
  73     @Override
  74     protected void updatePeerImpl(Node node) {
  75         super.updatePeerImpl(node);
  76         parentAccessor.doUpdatePeer(node);
  77     }
  78 
  79     @Override
  80     protected BaseBounds computeGeomBoundsImpl(Node node, BaseBounds bounds,
  81             BaseTransform tx) {
  82         return parentAccessor.doComputeGeomBounds(node, bounds, tx);
  83     }
  84 
  85     @Override
  86     protected boolean computeContainsImpl(Node node, double localX, double localY) {
  87         return parentAccessor.doComputeContains(node, localX, localY);
  88     }
  89 
  90     void superProcessCSSImpl(Node node) {
  91         super.processCSSImpl(node);
  92     }
  93 
  94     protected void processCSSImpl(Node node) {
  95         parentAccessor.doProcessCSS(node);
  96     }
  97 
  98     @Override
  99     protected Object processMXNodeImpl(Node node, MXNodeAlgorithm alg, MXNodeAlgorithmContext ctx) {
 100         return parentAccessor.doProcessMXNode(node, alg, ctx);
 101     }
 102 
 103     @Override
 104     protected void pickNodeLocalImpl(Node node, PickRay localPickRay,
 105             PickResultChooser result) {
 106         parentAccessor.doPickNodeLocal(node, localPickRay, result);
 107     }
 108 
 109     public static boolean pickChildrenNode(Parent parent, PickRay pickRay,
 110             PickResultChooser result) {
 111         return parentAccessor.pickChildrenNode(parent, pickRay, result);
 112     }
 113 
 114     public static void setTraversalEngine(Parent parent, ParentTraversalEngine value) {
 115         parentAccessor.setTraversalEngine(parent, value);
 116     }
 117 
 118     public static ParentTraversalEngine getTraversalEngine(Parent parent) {
 119         return parentAccessor.getTraversalEngine(parent);
 120     }
 121 
 122     public static List<String> getAllParentStylesheets(Parent parent) {
 123         return parentAccessor.getAllParentStylesheets(parent);
 124     }
 125 
 126     public static void setParentAccessor(final ParentAccessor newAccessor) {
 127         if (parentAccessor != null) {
 128             throw new IllegalStateException();
 129         }
 130 
 131         parentAccessor = newAccessor;
 132     }
 133 
 134     public interface ParentAccessor {
 135         NGNode doCreatePeer(Node node);
 136         void doUpdatePeer(Node node);
 137         boolean doComputeContains(Node node, double localX, double localY);
 138         BaseBounds doComputeGeomBounds(Node node, BaseBounds bounds, BaseTransform tx);
 139         void doProcessCSS(Node node);
 140         Object doProcessMXNode(Node node, MXNodeAlgorithm alg, MXNodeAlgorithmContext ctx);
 141         void doPickNodeLocal(Node node, PickRay localPickRay, PickResultChooser result);
 142         boolean pickChildrenNode(Parent parent, PickRay pickRay, PickResultChooser result);
 143         void setTraversalEngine(Parent parent, ParentTraversalEngine value);
 144         ParentTraversalEngine getTraversalEngine(Parent parent);
 145         List<String> getAllParentStylesheets(Parent parent);
 146     }
 147 
 148 }