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    }