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 
  33 package com.oracle.javafx.scenebuilder.kit.util;
  34 
  35 /**
  36  *
  37  */
  38 public class GridBounds {
  39 
  40     private final int minColumnIndex;
  41     private final int minRowIndex;
  42     private final int columnSpan;
  43     private final int rowSpan;
  44 
  45     public GridBounds(int columnIndex, int rowIndex, int columnSpan, int rowSpan) {
  46         assert (columnSpan >= 0);
  47         assert (rowSpan >= 0);
  48         this.minColumnIndex = columnIndex;
  49         this.minRowIndex = rowIndex;
  50         this.columnSpan = columnSpan;
  51         this.rowSpan = rowSpan;
  52     }
  53 
  54     public int getMinColumnIndex() {
  55         return minColumnIndex;
  56     }
  57 
  58     public int getMinRowIndex() {
  59         return minRowIndex;
  60     }
  61 
  62     public int getColumnSpan() {
  63         return columnSpan;
  64     }
  65 
  66     public int getRowSpan() {
  67         return rowSpan;
  68     }
  69 
  70     public int getMaxColumnIndex() {
  71         return minColumnIndex + columnSpan;
  72     }
  73 
  74     public int getMaxRowIndex() {
  75         return minRowIndex + rowSpan;
  76     }
  77 
  78     public boolean isEmpty() {
  79         return (columnSpan == 0) || (rowSpan == 0);
  80     }
  81 
  82     public GridBounds move(int columnDelta, int rowDelta) {
  83         final int newColumnIndex = minColumnIndex + columnDelta;
  84         final int newRowIndex = minRowIndex + rowDelta;
  85         return new GridBounds(newColumnIndex, newRowIndex, columnSpan, rowSpan);
  86     }
  87 
  88     public GridBounds union(GridBounds gridBounds) {
  89         final int newMinColumnIndex = Math.min(minColumnIndex, gridBounds.minColumnIndex);
  90         final int newMinRowIndex = Math.min(minRowIndex, gridBounds.minRowIndex);
  91         final int newMaxColumnIndex = Math.max(getMaxColumnIndex(), gridBounds.getMaxColumnIndex());
  92         final int newMaxRowIndex = Math.max(getMaxRowIndex(), gridBounds.getMaxRowIndex());
  93         final int newColumnSpan = newMaxColumnIndex - newMinColumnIndex;
  94         final int newRowSpan = newMaxRowIndex - newMinRowIndex;
  95         return new GridBounds(newMinColumnIndex, newMinRowIndex, newColumnSpan, newRowSpan);
  96     }
  97 }