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.shape;
  27 
  28 import com.sun.javafx.sg.prism.NGNode;
  29 import com.sun.javafx.util.Utils;
  30 import javafx.geometry.Bounds;
  31 import javafx.scene.Node;
  32 import javafx.scene.paint.Paint;
  33 import javafx.scene.shape.Path;
  34 import javafx.scene.shape.Shape;
  35 
  36 /**
  37  * Used to access internal methods of Path.
  38  */
  39 public class PathHelper extends ShapeHelper {
  40 
  41     private static final PathHelper theInstance;
  42     private static PathAccessor pathAccessor;
  43 
  44     static {
  45         theInstance = new PathHelper();
  46         Utils.forceInit(Path.class);
  47     }
  48 
  49     private static PathHelper getInstance() {
  50         return theInstance;
  51     }
  52 
  53     public static void initHelper(Path path) {
  54         setHelper(path, getInstance());
  55     }
  56 
  57     @Override
  58     protected NGNode createPeerImpl(Node node) {
  59         return pathAccessor.doCreatePeer(node);
  60     }
  61 
  62     @Override
  63     protected void updatePeerImpl(Node node) {
  64         super.updatePeerImpl(node);
  65         pathAccessor.doUpdatePeer(node);
  66     }
  67 
  68     @Override
  69     protected Bounds computeLayoutBoundsImpl(Node node) {
  70         Bounds bounds = pathAccessor.doComputeLayoutBounds(node);
  71         if ( bounds != null) {
  72             return bounds;
  73         }
  74         return super.computeLayoutBoundsImpl(node);
  75     }
  76 
  77     @Override
  78     protected Paint cssGetFillInitialValueImpl(Shape shape) {
  79         return pathAccessor.doCssGetFillInitialValue(shape);
  80     }
  81 
  82     @Override
  83     protected Paint cssGetStrokeInitialValueImpl(Shape shape) {
  84         return pathAccessor.doCssGetStrokeInitialValue(shape);
  85     }
  86 
  87     @Override
  88     protected  com.sun.javafx.geom.Shape configShapeImpl(Shape shape) {
  89         return pathAccessor.doConfigShape(shape);
  90     }
  91 
  92     public static void setPathAccessor(final PathAccessor newAccessor) {
  93         if (pathAccessor != null) {
  94             throw new IllegalStateException();
  95         }
  96 
  97         pathAccessor = newAccessor;
  98     }
  99 
 100     public interface PathAccessor {
 101         NGNode doCreatePeer(Node node);
 102         void doUpdatePeer(Node node);
 103         Bounds doComputeLayoutBounds(Node node);
 104         Paint doCssGetFillInitialValue(Shape shape);
 105         Paint doCssGetStrokeInitialValue(Shape shape);
 106         com.sun.javafx.geom.Shape doConfigShape(Shape shape);
 107     }
 108 
 109 }
 110