com.aowagie.text.pdf.hyphenation.Hyphenator Maven / Gradle / Ivy
/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.aowagie.text.pdf.hyphenation;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.Hashtable;
import com.aowagie.text.pdf.BaseFont;
/**
* This class is the main entry point to the hyphenation package.
* You can use only the static methods or create an instance.
*
* @author Carlos Villegas <[email protected]>
*/
public class Hyphenator {
/** TODO: Don't use statics */
private static Hashtable hyphenTrees = new Hashtable();
private HyphenationTree hyphenTree = null;
private int remainCharCount = 2;
private int pushCharCount = 2;
private static final String defaultHyphLocation = "com/lowagie/text/pdf/hyphenation/hyph/";
/** Holds value of property hyphenDir. */
private static String hyphenDir = "";
/**
* @param lang language to set
* @param country country to set
* @param leftMin left minimum to set
* @param rightMin right minimum to set
*/
public Hyphenator(final String lang, final String country, final int leftMin,
final int rightMin) {
this.hyphenTree = getHyphenationTree(lang, country);
this.remainCharCount = leftMin;
this.pushCharCount = rightMin;
}
/**
* @param lang
* @param country
* @return the hyphenation tree
*/
private static HyphenationTree getHyphenationTree(final String lang,
final String country) {
String key = lang;
// check whether the country code has been used
if (country != null && !country.equals("none")) {
key += "_" + country;
}
// first try to find it in the cache
if (hyphenTrees.containsKey(key)) {
return (HyphenationTree)hyphenTrees.get(key);
}
if (hyphenTrees.containsKey(lang)) {
return (HyphenationTree)hyphenTrees.get(lang);
}
HyphenationTree hTree = getResourceHyphenationTree(key);
if (hTree == null) {
hTree = getFileHyphenationTree(key);
}
// put it into the pattern cache
if (hTree != null) {
hyphenTrees.put(key, hTree);
}
return hTree;
}
/**
* @param key
* @return a hyphenation tree
*/
private static HyphenationTree getResourceHyphenationTree(final String key) {
try {
InputStream stream = BaseFont.getResourceStream(defaultHyphLocation + key + ".xml");
if (stream == null && key.length() > 2) {
stream = BaseFont.getResourceStream(defaultHyphLocation + key.substring(0, 2) + ".xml");
}
if (stream == null) {
return null;
}
final HyphenationTree hTree = new HyphenationTree();
hTree.loadSimplePatterns(stream);
return hTree;
}
catch (final Exception e) {
return null;
}
}
/**
* @param key
* @return a hyphenation tree
*/
private static HyphenationTree getFileHyphenationTree(final String key) {
try {
if (hyphenDir == null) {
return null;
}
InputStream stream = null;
File hyphenFile = new File(hyphenDir, key + ".xml");
if (hyphenFile.canRead()) {
stream = new FileInputStream(hyphenFile);
}
if (stream == null && key.length() > 2) {
hyphenFile = new File(hyphenDir, key.substring(0, 2) + ".xml");
if (hyphenFile.canRead()) {
stream = new FileInputStream(hyphenFile);
}
}
if (stream == null) {
return null;
}
final HyphenationTree hTree = new HyphenationTree();
hTree.loadSimplePatterns(stream);
return hTree;
}
catch (final Exception e) {
return null;
}
}
/**
* @param min minimum to set
*/
public void setMinRemainCharCount(final int min) {
this.remainCharCount = min;
}
/**
* @param min minimum to set
*/
public void setMinPushCharCount(final int min) {
this.pushCharCount = min;
}
/**
* @param word word to set
* @return a hyphenation object
*/
public Hyphenation hyphenate(final String word) {
if (this.hyphenTree == null) {
return null;
}
return this.hyphenTree.hyphenate(word, this.remainCharCount, this.pushCharCount);
}
}