Source for java.awt.font.TextHitInfo

   1: /* TextHitInfo.java -- 
   2:    Copyright (C) 2002, 2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package java.awt.font;
  39: 
  40: /**
  41:  * @author John Leuner (jewel@debian.org)
  42:  */
  43: public final class TextHitInfo
  44: {
  45:   private int charIndex;
  46:   private boolean leadingEdge;
  47:   
  48:   TextHitInfo (int charIndex, boolean leadingEdge)
  49:   {
  50:     this.charIndex = charIndex;
  51:     this.leadingEdge = leadingEdge;
  52:   }
  53:   
  54:   public int getCharIndex()
  55:   {
  56:     return charIndex;
  57:   }
  58: 
  59:   public boolean isLeadingEdge()
  60:   {
  61:     return leadingEdge;
  62:   }
  63: 
  64:   public int getInsertionIndex()
  65:   {
  66:     return (leadingEdge ? charIndex : charIndex + 1);
  67:   }
  68: 
  69:   public int hashCode()
  70:   {
  71:     return charIndex;
  72:   }
  73: 
  74:   public boolean equals(Object obj)
  75:   {
  76:     if(obj instanceof TextHitInfo)
  77:       return this.equals((TextHitInfo) obj);
  78:     
  79:     return false;
  80:   }
  81: 
  82:   public boolean equals(TextHitInfo hitInfo)
  83:   {
  84:     if (hitInfo == null)
  85:       return false;
  86:     
  87:     return (charIndex == hitInfo.getCharIndex ())
  88:             && (leadingEdge == hitInfo.isLeadingEdge ());
  89:   }
  90: 
  91:   public static TextHitInfo leading(int charIndex)
  92:   {
  93:     return new TextHitInfo (charIndex, true);
  94:   }
  95: 
  96:   public static TextHitInfo trailing(int charIndex)
  97:   {
  98:     return new TextHitInfo (charIndex, false);
  99:   }
 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: }