1 /*
2 * $Id: DefaultSplitCharacter.java 3427 2008-05-24 18:32:31Z xlv $
3 *
4 * Copyright 2008 Bruno Lowagie and Xavier Le Vourch
5 *
6 * The contents of this file are subject to the Mozilla Public License Version 1.1
7 * (the "License"); you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
9 *
10 * Software distributed under the License is distributed on an "AS IS" basis,
11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 * for the specific language governing rights and limitations under the License.
13 *
14 * The Original Code is 'iText, a free JAVA-PDF library'.
15 *
16 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
17 * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
18 * All Rights Reserved.
19 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
20 * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
21 *
22 * Contributor(s): all the names of the contributors are added in the source code
23 * where applicable.
24 *
25 * Alternatively, the contents of this file may be used under the terms of the
26 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
27 * provisions of LGPL are applicable instead of those above. If you wish to
28 * allow use of your version of this file only under the terms of the LGPL
29 * License and not to allow others to use your version of this file under
30 * the MPL, indicate your decision by deleting the provisions above and
31 * replace them with the notice and other provisions required by the LGPL.
32 * If you do not delete the provisions above, a recipient may use your version
33 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
34 *
35 * This library is free software; you can redistribute it and/or modify it
36 * under the terms of the MPL as stated above or under the terms of the GNU
37 * Library General Public License as published by the Free Software Foundation;
38 * either version 2 of the License, or any later version.
39 *
40 * This library is distributed in the hope that it will be useful, but WITHOUT
41 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
42 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
43 * details.
44 *
45 * If you didn't download this code from the following link, you should check if
46 * you aren't using an obsolete version:
47 * http://www.lowagie.com/iText/
48 */
49
50 package com.lowagie.text.pdf;
51
52 import com.lowagie.text.SplitCharacter;
53
54 /**
55 * The default class that is used to determine whether or not a character
56 * is a split character. You can subclass this class to define your own
57 * split characters.
58 * @since 2.1.2
59 */
60 public class DefaultSplitCharacter implements SplitCharacter {
61
62 /**
63 * An instance of the default SplitCharacter.
64 */
65 public static final SplitCharacter DEFAULT = new DefaultSplitCharacter();
66
67 /**
68 * Checks if a character can be used to split a <CODE>PdfString</CODE>.
69 * <P>
70 * for the moment every character less than or equal to SPACE, the character '-'
71 * and some specific unicode ranges are 'splitCharacters'.
72 *
73 * @param start start position in the array
74 * @param current current position in the array
75 * @param end end position in the array
76 * @param cc the character array that has to be checked
77 * @param ck chunk array
78 * @return <CODE>true</CODE> if the character can be used to split a string, <CODE>false</CODE> otherwise
79 */
80 public boolean isSplitCharacter(int start, int current, int end, char[] cc, PdfChunk[] ck) {
81 char c = getCurrentCharacter(current, cc, ck);
82 if (c <= ' ' || c == '-' || c == '\u2010') {
83 return true;
84 }
85 if (c < 0x2002)
86 return false;
87 return ((c >= 0x2002 && c <= 0x200b)
88 || (c >= 0x2e80 && c < 0xd7a0)
89 || (c >= 0xf900 && c < 0xfb00)
90 || (c >= 0xfe30 && c < 0xfe50)
91 || (c >= 0xff61 && c < 0xffa0));
92 }
93
94 /**
95 * Returns the current character
96 * @param current current position in the array
97 * @param cc the character array that has to be checked
98 * @param ck chunk array
99 * @return the current character
100 */
101 protected char getCurrentCharacter(int current, char[] cc, PdfChunk[] ck) {
102 if (ck == null) {
103 return cc[current];
104 }
105 return (char)ck[Math.min(current, ck.length - 1)].getUnicodeEquivalent(cc[current]);
106 }
107 }
108