001: /*
002: * Copyright 2002 Paulo Soares
003: *
004: * The contents of this file are subject to the Mozilla Public License Version 1.1
005: * (the "License"); you may not use this file except in compliance with the License.
006: * You may obtain a copy of the License at http://www.mozilla.org/MPL/
007: *
008: * Software distributed under the License is distributed on an "AS IS" basis,
009: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
010: * for the specific language governing rights and limitations under the License.
011: *
012: * The Original Code is 'iText, a free JAVA-PDF library'.
013: *
014: * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
015: * the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
016: * All Rights Reserved.
017: * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
018: * are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
019: *
020: * Contributor(s): all the names of the contributors are added in the source code
021: * where applicable.
022: *
023: * Alternatively, the contents of this file may be used under the terms of the
024: * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
025: * provisions of LGPL are applicable instead of those above. If you wish to
026: * allow use of your version of this file only under the terms of the LGPL
027: * License and not to allow others to use your version of this file under
028: * the MPL, indicate your decision by deleting the provisions above and
029: * replace them with the notice and other provisions required by the LGPL.
030: * If you do not delete the provisions above, a recipient may use your version
031: * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
032: *
033: * This library is free software; you can redistribute it and/or modify it
034: * under the terms of the MPL as stated above or under the terms of the GNU
035: * Library General Public License as published by the Free Software Foundation;
036: * either version 2 of the License, or any later version.
037: *
038: * This library is distributed in the hope that it will be useful, but WITHOUT
039: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
040: * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
041: * details.
042: *
043: * If you didn't download this code from the following link, you should check if
044: * you aren't using an obsolete version:
045: * http://www.lowagie.com/iText/
046: */
047:
048: package com.lowagie.text.pdf;
049:
050: import com.lowagie.text.pdf.hyphenation.Hyphenation;
051: import com.lowagie.text.pdf.hyphenation.Hyphenator;
052:
053: /** Hyphenates words automatically accordingly to the language and country.
054: * The hyphenator engine was taken from FOP and uses the TEX patterns. If a language
055: * is not provided and a TEX pattern for it exists, it can be easily adapted.
056: *
057: * @author Paulo Soares (psoares@consiste.pt)
058: */
059: public class HyphenationAuto implements HyphenationEvent {
060:
061: /** The hyphenator engine.
062: */
063: protected Hyphenator hyphenator;
064: /** The second part of the hyphenated word.
065: */
066: protected String post;
067:
068: /** Creates a new hyphenation instance usable in <CODE>Chunk</CODE>.
069: * @param lang the language ("en" for english, for example)
070: * @param country the country ("GB" for Great-Britain or "none" for no country, for example)
071: * @param leftMin the minimun number of letters before the hyphen
072: * @param rightMin the minimun number of letters after the hyphen
073: */
074: public HyphenationAuto(String lang, String country, int leftMin,
075: int rightMin) {
076: hyphenator = new Hyphenator(lang, country, leftMin, rightMin);
077: }
078:
079: /** Gets the hyphen symbol.
080: * @return the hyphen symbol
081: */
082: public String getHyphenSymbol() {
083: return "-";
084: }
085:
086: /** Hyphenates a word and returns the first part of it. To get
087: * the second part of the hyphenated word call <CODE>getHyphenatedWordPost()</CODE>.
088: * @param word the word to hyphenate
089: * @param font the font used by this word
090: * @param fontSize the font size used by this word
091: * @param remainingWidth the width available to fit this word in
092: * @return the first part of the hyphenated word including
093: * the hyphen symbol, if any
094: */
095: public String getHyphenatedWordPre(String word, BaseFont font,
096: float fontSize, float remainingWidth) {
097: post = word;
098: String hyphen = getHyphenSymbol();
099: float hyphenWidth = font.getWidthPoint(hyphen, fontSize);
100: if (hyphenWidth > remainingWidth)
101: return "";
102: Hyphenation hyphenation = hyphenator.hyphenate(word);
103: if (hyphenation == null) {
104: return "";
105: }
106: int len = hyphenation.length();
107: int k;
108: for (k = 0; k < len; ++k) {
109: if (font.getWidthPoint(hyphenation.getPreHyphenText(k),
110: fontSize)
111: + hyphenWidth > remainingWidth)
112: break;
113: }
114: --k;
115: if (k < 0)
116: return "";
117: post = hyphenation.getPostHyphenText(k);
118: return hyphenation.getPreHyphenText(k) + hyphen;
119: }
120:
121: /** Gets the second part of the hyphenated word. Must be called
122: * after <CODE>getHyphenatedWordPre()</CODE>.
123: * @return the second part of the hyphenated word
124: */
125: public String getHyphenatedWordPost() {
126: return post;
127: }
128:
129: }
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