/*
*
* This file is part of the iText (R) project.
Copyright (c) 1998-2017 iText Group NV
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY
* ITEXT GROUP. ITEXT GROUP DISCLAIMS THE WARRANTY OF NON INFRINGEMENT
* OF THIRD PARTY RIGHTS
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
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*/
package com.itextpdf.text.pdf;
import com.itextpdf.text.pdf.hyphenation.Hyphenation;
import com.itextpdf.text.pdf.hyphenation.Hyphenator;
/** Hyphenates words automatically accordingly to the language and country.
* The hyphenator engine was taken from FOP and uses the TEX patterns. If a language
* is not provided and a TEX pattern for it exists, it can be easily adapted.
*
* @author Paulo Soares
*/
public class HyphenationAuto implements HyphenationEvent {
/** The hyphenator engine.
*/
protected Hyphenator hyphenator;
/** The second part of the hyphenated word.
*/
protected String post;
/** Creates a new hyphenation instance usable in <CODE>Chunk</CODE>.
* @param lang the language ("en" for English, for example)
* @param country the country ("GB" for Great-Britain or "none" for no country, for example)
* @param leftMin the minimum number of letters before the hyphen
* @param rightMin the minimum number of letters after the hyphen
*/
public HyphenationAuto(String lang, String country, int leftMin, int rightMin) {
hyphenator = new Hyphenator(lang, country, leftMin, rightMin);
}
/** Gets the hyphen symbol.
* @return the hyphen symbol
*/
public String getHyphenSymbol() {
return "-";
}
/** Hyphenates a word and returns the first part of it. To get
* the second part of the hyphenated word call <CODE>getHyphenatedWordPost()</CODE>.
* @param word the word to hyphenate
* @param font the font used by this word
* @param fontSize the font size used by this word
* @param remainingWidth the width available to fit this word in
* @return the first part of the hyphenated word including
* the hyphen symbol, if any
*/
public String getHyphenatedWordPre(String word, BaseFont font, float fontSize, float remainingWidth) {
post = word;
String hyphen = getHyphenSymbol();
float hyphenWidth = font.getWidthPoint(hyphen, fontSize);
if (hyphenWidth > remainingWidth)
return "";
Hyphenation hyphenation = hyphenator.hyphenate(word);
if (hyphenation == null) {
return "";
}
int len = hyphenation.length();
int k;
for (k = 0; k < len; ++k) {
if (font.getWidthPoint(hyphenation.getPreHyphenText(k), fontSize) + hyphenWidth > remainingWidth)
break;
}
--k;
if (k < 0)
return "";
post = hyphenation.getPostHyphenText(k);
return hyphenation.getPreHyphenText(k) + hyphen;
}
/** Gets the second part of the hyphenated word. Must be called
* after <CODE>getHyphenatedWordPre()</CODE>.
* @return the second part of the hyphenated word
*/
public String getHyphenatedWordPost() {
return post;
}
}