1. /*

  2.  * @(#)Ligaturizer.java	1.3 01/11/29

  3.  *

  4.  * Copyright 2002 Sun Microsystems, Inc. All rights reserved.

  5.  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.

  6.  */

  7. /*

  8.  * @(#)Ligaturizer.java	1.2 98/07/31

  9.  *

  10.  * (C) Copyright IBM Corp. 1998 - All Rights Reserved

  11.  */

  12. 

  13. package javax.swing.text;

  14. 

  15. /*

  16.  * An object that ligaturizes a character array.

  17.  */

  18. 

  19. abstract class Ligaturizer {

  20.   /**

  21.    * Convert text between start and limit to incorporate ligatures.

  22.    * Text is in visual order.  Shaping, if required, has already been

  23.    * performed on the text. The leftmost character of a matching

  24.    * string is replaced by the ligature character, other characters

  25.    * of the string are replaced by U+ffff.  Transparent characters

  26.    * not defined as part of the ligature remain unchanged, and are

  27.    * ignored by the matching process.

  28.    */

  29.   abstract void ligaturize(char[] text, int start, int length);

  30. 

  31.   /*

  32.    * Return a ligaturizer that only generates those ligatures from the

  33.    * original ligaturizer that the filter accepts.  Note that it is

  34.    * not possible to 'unrestrict' a ligaturizer.

  35.    */

  36.   abstract Ligaturizer restrict(Ligaturizer.Filter f);

  37. 

  38.   /*

  39.    * A functor used to restrict a Ligaturizer to only those ligatures

  40.    * for which 'accepts' returns true.

  41.    */

  42.   static abstract class Filter {

  43.     abstract boolean accepts(char c);

  44.   }

  45. }