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iTechSharp/iTextSharp/text/pdf/hyphenation/Hyphenator.cs
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iTechSharp/iTextSharp/text/pdf/hyphenation/Hyphenator.cs
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using System;
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using System.IO;
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using System.Text;
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using System.Collections;
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using System.util;
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using iTextSharp.text.pdf;
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/*
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* Copyright 1999-2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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namespace iTextSharp.text.pdf.hyphenation {
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/**
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* This class is the main entry point to the hyphenation package.
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* You can use only the static methods or create an instance.
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*
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* @author Carlos Villegas <cav@uniscope.co.jp>
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*/
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public class Hyphenator {
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/** TODO: Don't use statics */
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private static Hashtable hyphenTrees = Hashtable.Synchronized(new Hashtable());
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private HyphenationTree hyphenTree = null;
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private int remainCharCount = 2;
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private int pushCharCount = 2;
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private const String defaultHyphLocation = "iTextSharp.text.pdf.hyphenation.hyph.";
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/**
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* @param lang
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* @param country
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* @param leftMin
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* @param rightMin
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*/
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public Hyphenator(String lang, String country, int leftMin,
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int rightMin) {
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hyphenTree = GetHyphenationTree(lang, country);
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remainCharCount = leftMin;
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pushCharCount = rightMin;
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}
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/**
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* @param lang
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* @param country
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* @return the hyphenation tree
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*/
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public static HyphenationTree GetHyphenationTree(String lang,
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String country) {
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String key = lang;
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// check whether the country code has been used
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if (country != null && !country.Equals("none")) {
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key += "_" + country;
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}
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// first try to find it in the cache
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if (hyphenTrees.ContainsKey(key)) {
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return (HyphenationTree)hyphenTrees[key];
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}
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if (hyphenTrees.ContainsKey(lang)) {
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return (HyphenationTree)hyphenTrees[lang];
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}
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HyphenationTree hTree = GetResourceHyphenationTree(key);
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//if (hTree == null)
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// hTree = GetFileHyphenationTree(key);
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// put it into the pattern cache
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if (hTree != null) {
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hyphenTrees[key] = hTree;
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}
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return hTree;
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}
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/**
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* @param key
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* @return a hyphenation tree
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*/
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public static HyphenationTree GetResourceHyphenationTree(String key) {
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try {
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Stream stream = BaseFont.GetResourceStream(defaultHyphLocation + key + ".xml");
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if (stream == null && key.Length > 2)
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stream = BaseFont.GetResourceStream(defaultHyphLocation + key.Substring(0, 2) + ".xml");
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if (stream == null)
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return null;
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HyphenationTree hTree = new HyphenationTree();
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hTree.LoadSimplePatterns(stream);
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return hTree;
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}
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catch {
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return null;
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}
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}
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/**
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* @param key
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* @return a hyphenation tree
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*/
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/* public static HyphenationTree GetFileHyphenationTree(String key) {
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try {
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if (hyphenDir == null)
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return null;
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Stream stream = null;
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string hyphenFile = Path.Combine(hyphenDir, key + ".xml");
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if (File.Exists(hyphenFile))
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stream = new FileStream(hyphenFile, FileMode.Open, FileAccess.Read, FileShare.Read);
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if (stream == null && key.Length > 2) {
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hyphenFile = Path.Combine(hyphenDir, key.Substring(0, 2) + ".xml");
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if (File.Exists(hyphenFile))
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stream = new FileStream(hyphenFile, FileMode.Open, FileAccess.Read, FileShare.Read);
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}
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if (stream == null)
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return null;
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HyphenationTree hTree = new HyphenationTree();
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hTree.LoadSimplePatterns(stream);
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return hTree;
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}
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catch (Exception e) {
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return null;
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}
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}*/
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/**
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* @param lang
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* @param country
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* @param word
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* @param leftMin
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* @param rightMin
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* @return a hyphenation object
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*/
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public static Hyphenation Hyphenate(String lang, String country,
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String word, int leftMin,
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int rightMin) {
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HyphenationTree hTree = GetHyphenationTree(lang, country);
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if (hTree == null) {
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//log.Error("Error building hyphenation tree for language "
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// + lang);
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return null;
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}
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return hTree.Hyphenate(word, leftMin, rightMin);
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}
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/**
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* @param lang
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* @param country
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* @param word
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* @param offset
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* @param len
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* @param leftMin
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* @param rightMin
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* @return a hyphenation object
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*/
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public static Hyphenation Hyphenate(String lang, String country,
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char[] word, int offset, int len,
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int leftMin, int rightMin) {
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HyphenationTree hTree = GetHyphenationTree(lang, country);
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if (hTree == null) {
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//log.Error("Error building hyphenation tree for language "
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// + lang);
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return null;
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}
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return hTree.Hyphenate(word, offset, len, leftMin, rightMin);
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}
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/**
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* @param min
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*/
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public void SetMinRemainCharCount(int min) {
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remainCharCount = min;
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}
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/**
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* @param min
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*/
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public void SetMinPushCharCount(int min) {
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pushCharCount = min;
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}
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/**
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* @param lang
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* @param country
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*/
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public void SetLanguage(String lang, String country) {
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hyphenTree = GetHyphenationTree(lang, country);
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}
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/**
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* @param word
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* @param offset
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* @param len
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* @return a hyphenation object
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*/
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public Hyphenation Hyphenate(char[] word, int offset, int len) {
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if (hyphenTree == null) {
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return null;
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}
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return hyphenTree.Hyphenate(word, offset, len, remainCharCount,
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pushCharCount);
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}
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/**
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* @param word
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* @return a hyphenation object
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*/
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public Hyphenation Hyphenate(String word) {
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if (hyphenTree == null) {
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return null;
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}
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return hyphenTree.Hyphenate(word, remainCharCount, pushCharCount);
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}
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}
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}
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