1 /*
   2  * Copyright (c) 2012, 2014, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 package com.oracle.javafx.scenebuilder.kit.fxom;
  33 
  34 import com.oracle.javafx.scenebuilder.kit.fxom.glue.GlueDocument;
  35 import com.oracle.javafx.scenebuilder.kit.fxom.glue.GlueElement;
  36 
  37 /**
  38  *
  39  *
  40  */
  41 class GlueCursor {
  42 
  43     private final GlueDocument glueDocument;
  44     private GlueElement currentElement;
  45 
  46     public GlueCursor(GlueDocument glueDocument) {
  47         this.glueDocument = glueDocument;
  48         gotoFirstElement();
  49     }
  50 
  51     public GlueElement getCurrentElement() {
  52         return currentElement;
  53     }
  54 
  55     public final void gotoFirstElement() {
  56         currentElement = glueDocument.getRootElement();
  57     }
  58 
  59     public void moveToNextElement() {
  60         assert currentElement != null;
  61 
  62         if (currentElement.getChildren().isEmpty()) {
  63             GlueElement nextElement = currentElement.getNextSibling();
  64             while ((nextElement == null) && (currentElement.getParent()!= null)) {
  65                 currentElement = currentElement.getParent();
  66                 nextElement = currentElement.getNextSibling();
  67             }
  68             currentElement = nextElement;
  69         } else {
  70             currentElement = currentElement.getChildren().get(0);
  71         }
  72     }
  73 }