001 /* TextHitInfo.java --
002 Copyright (C) 2002, 2005 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038 package java.awt.font;
039
040 /**
041 * @author John Leuner (jewel@debian.org)
042 */
043 public final class TextHitInfo
044 {
045 private int charIndex;
046 private boolean leadingEdge;
047
048 TextHitInfo (int charIndex, boolean leadingEdge)
049 {
050 this.charIndex = charIndex;
051 this.leadingEdge = leadingEdge;
052 }
053
054 public int getCharIndex()
055 {
056 return charIndex;
057 }
058
059 public boolean isLeadingEdge()
060 {
061 return leadingEdge;
062 }
063
064 public int getInsertionIndex()
065 {
066 return (leadingEdge ? charIndex : charIndex + 1);
067 }
068
069 public int hashCode()
070 {
071 return charIndex;
072 }
073
074 public boolean equals(Object obj)
075 {
076 if(obj instanceof TextHitInfo)
077 return this.equals((TextHitInfo) obj);
078
079 return false;
080 }
081
082 public boolean equals(TextHitInfo hitInfo)
083 {
084 if (hitInfo == null)
085 return false;
086
087 return (charIndex == hitInfo.getCharIndex ())
088 && (leadingEdge == hitInfo.isLeadingEdge ());
089 }
090
091 public static TextHitInfo leading(int charIndex)
092 {
093 return new TextHitInfo (charIndex, true);
094 }
095
096 public static TextHitInfo trailing(int charIndex)
097 {
098 return new TextHitInfo (charIndex, false);
099 }
100
101 public static TextHitInfo beforeOffset(int offset)
102 {
103 return new TextHitInfo ((offset - 1), false);
104 }
105
106 public static TextHitInfo afterOffset(int offset)
107 {
108 return new TextHitInfo (offset, true);
109 }
110
111 public TextHitInfo getOtherHit()
112 {
113 return (leadingEdge ? trailing (charIndex - 1) : leading (charIndex + 1));
114 }
115
116 public TextHitInfo getOffsetHit(int offset)
117 {
118 return new TextHitInfo (charIndex + offset, leadingEdge);
119 }
120
121 public String toString()
122 {
123 return "TextHitInfo["
124 + charIndex
125 + (leadingEdge ? "L" : "T" )
126 + "]";
127 }
128 }