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.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.geometry.Bounds;
  33 import javafx.scene.Node;
  34 import javafx.scene.shape.Shape;
  35 import javafx.scene.text.Text;
  36 
  37 /**
  38  * Used to access internal methods of Text.
  39  */
  40 public class TextHelper extends ShapeHelper {
  41 
  42     private static final TextHelper theInstance;
  43     private static TextAccessor textAccessor;
  44 
  45     static {
  46         theInstance = new TextHelper();
  47         Utils.forceInit(Text.class);
  48     }
  49 
  50     private static TextHelper getInstance() {
  51         return theInstance;
  52     }
  53 
  54     public static void initHelper(Text text) {
  55         setHelper(text, getInstance());
  56     }
  57 
  58     public static BaseBounds superComputeGeomBounds(Node node, BaseBounds bounds,
  59             BaseTransform tx) {
  60         return ((TextHelper) getHelper(node)).superComputeGeomBoundsImpl(node, bounds, tx);
  61     }
  62 
  63     public static Bounds superComputeLayoutBounds(Node node) {
  64         return ((TextHelper) getHelper(node)).superComputeLayoutBoundsImpl(node);
  65     }
  66 
  67     @Override
  68     protected NGNode createPeerImpl(Node node) {
  69         return textAccessor.doCreatePeer(node);
  70     }
  71 
  72     @Override
  73     protected void updatePeerImpl(Node node) {
  74         super.updatePeerImpl(node);
  75         textAccessor.doUpdatePeer(node);
  76     }
  77 
  78     BaseBounds superComputeGeomBoundsImpl(Node node, BaseBounds bounds,
  79             BaseTransform tx) {
  80         return super.computeGeomBoundsImpl(node, bounds, tx);
  81     }
  82 
  83     Bounds superComputeLayoutBoundsImpl(Node node) {
  84         return super.computeLayoutBoundsImpl(node);
  85     }
  86 
  87     @Override
  88     protected BaseBounds computeGeomBoundsImpl(Node node, BaseBounds bounds,
  89             BaseTransform tx) {
  90         return textAccessor.doComputeGeomBounds(node, bounds, tx);
  91     }
  92 
  93     @Override
  94     protected Bounds computeLayoutBoundsImpl(Node node) {
  95         return textAccessor.doComputeLayoutBounds(node);
  96     }
  97 
  98     @Override
  99     protected boolean computeContainsImpl(Node node, double localX, double localY) {
 100         return textAccessor.doComputeContains(node, localX, localY);
 101     }
 102 
 103     @Override
 104     protected void geomChangedImpl(Node node) {
 105         super.geomChangedImpl(node);
 106         textAccessor.doGeomChanged(node);
 107     }
 108 
 109     @Override
 110     protected  com.sun.javafx.geom.Shape configShapeImpl(Shape shape) {
 111         return textAccessor.doConfigShape(shape);
 112     }
 113 
 114     public static void setTextAccessor(final TextAccessor newAccessor) {
 115         if (textAccessor != null) {
 116             throw new IllegalStateException();
 117         }
 118 
 119         textAccessor = newAccessor;
 120     }
 121 
 122     public interface TextAccessor {
 123         NGNode doCreatePeer(Node node);
 124         void doUpdatePeer(Node node);
 125         BaseBounds doComputeGeomBounds(Node node, BaseBounds bounds, BaseTransform tx);
 126         Bounds doComputeLayoutBounds(Node node);
 127         boolean doComputeContains(Node node, double localX, double localY);
 128         void doGeomChanged(Node node);
 129         com.sun.javafx.geom.Shape doConfigShape(Shape shape);
 130     }
 131 
 132 }
 133 
 134