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Devin Jankowski
2023-06-21 12:46:23 -04:00
commit c70248a520
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iTechSharp/iTextSharp/text/pdf/hyphenation/SimplePatternParser.cs Normal file
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using System;
using System.IO;
using System.Text;
using System.Collections;
using System.util;
using iTextSharp.text.xml.simpleparser;
/*
* Copyright 2005 by Paulo Soares.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999, 2000, 2001, 2002 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000, 2001, 2002 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
namespace iTextSharp.text.pdf.hyphenation {
/** Parses the xml hyphenation pattern.
*
* @author Paulo Soares (psoares@consiste.pt)
*/
public class SimplePatternParser : ISimpleXMLDocHandler {
internal int currElement;
internal IPatternConsumer consumer;
internal StringBuilder token;
internal ArrayList exception;
internal char hyphenChar;
internal const int ELEM_CLASSES = 1;
internal const int ELEM_EXCEPTIONS = 2;
internal const int ELEM_PATTERNS = 3;
internal const int ELEM_HYPHEN = 4;
/** Creates a new instance of PatternParser2 */
public SimplePatternParser() {
token = new StringBuilder();
hyphenChar = '-'; // default
}
public void Parse(Stream stream, IPatternConsumer consumer) {
this.consumer = consumer;
try {
SimpleXMLParser.Parse(this, stream);
}
finally {
try{stream.Close();}catch{}
}
}
protected static String GetPattern(String word) {
StringBuilder pat = new StringBuilder();
int len = word.Length;
for (int i = 0; i < len; i++) {
if (!char.IsDigit(word[i])) {
pat.Append(word[i]);
}
}
return pat.ToString();
}
protected ArrayList NormalizeException(ArrayList ex) {
ArrayList res = new ArrayList();
for (int i = 0; i < ex.Count; i++) {
Object item = ex[i];
if (item is String) {
String str = (String)item;
StringBuilder buf = new StringBuilder();
for (int j = 0; j < str.Length; j++) {
char c = str[j];
if (c != hyphenChar) {
buf.Append(c);
} else {
res.Add(buf.ToString());
buf.Length = 0;
char[] h = new char[1];
h[0] = hyphenChar;
// we use here hyphenChar which is not necessarily
// the one to be printed
res.Add(new Hyphen(new String(h), null, null));
}
}
if (buf.Length > 0) {
res.Add(buf.ToString());
}
} else {
res.Add(item);
}
}
return res;
}
protected String GetExceptionWord(ArrayList ex) {
StringBuilder res = new StringBuilder();
for (int i = 0; i < ex.Count; i++) {
Object item = ex[i];
if (item is String) {
res.Append((String)item);
} else {
if (((Hyphen)item).noBreak != null) {
res.Append(((Hyphen)item).noBreak);
}
}
}
return res.ToString();
}
protected static String GetInterletterValues(String pat) {
StringBuilder il = new StringBuilder();
String word = pat + "a"; // add dummy letter to serve as sentinel
int len = word.Length;
for (int i = 0; i < len; i++) {
char c = word[i];
if (char.IsDigit(c)) {
il.Append(c);
i++;
} else {
il.Append('0');
}
}
return il.ToString();
}
public void EndDocument() {
}
public void EndElement(String tag) {
if (token.Length > 0) {
String word = token.ToString();
switch (currElement) {
case ELEM_CLASSES:
consumer.AddClass(word);
break;
case ELEM_EXCEPTIONS:
exception.Add(word);
exception = NormalizeException(exception);
consumer.AddException(GetExceptionWord(exception),
(ArrayList)exception.Clone());
break;
case ELEM_PATTERNS:
consumer.AddPattern(GetPattern(word),
GetInterletterValues(word));
break;
case ELEM_HYPHEN:
// nothing to do
break;
}
if (currElement != ELEM_HYPHEN) {
token.Length = 0;
}
}
if (currElement == ELEM_HYPHEN) {
currElement = ELEM_EXCEPTIONS;
} else {
currElement = 0;
}
}
public void StartDocument() {
}
public void StartElement(String tag, Hashtable h) {
if (tag.Equals("hyphen-char")) {
String hh = (String)h["value"];
if (hh != null && hh.Length == 1) {
hyphenChar = hh[0];
}
} else if (tag.Equals("classes")) {
currElement = ELEM_CLASSES;
} else if (tag.Equals("patterns")) {
currElement = ELEM_PATTERNS;
} else if (tag.Equals("exceptions")) {
currElement = ELEM_EXCEPTIONS;
exception = new ArrayList();
} else if (tag.Equals("hyphen")) {
if (token.Length > 0) {
exception.Add(token.ToString());
}
exception.Add(new Hyphen((String)h["pre"],
(String)h["no"],
(String)h["post"]));
currElement = ELEM_HYPHEN;
}
token.Length = 0;
}
public void Text(String str) {
StringTokenizer tk = new StringTokenizer(str);
while (tk.HasMoreTokens()) {
String word = tk.NextToken();
// System.out.Println("\"" + word + "\"");
switch (currElement) {
case ELEM_CLASSES:
consumer.AddClass(word);
break;
case ELEM_EXCEPTIONS:
exception.Add(word);
exception = NormalizeException(exception);
consumer.AddException(GetExceptionWord(exception),
(ArrayList)exception.Clone());
exception.Clear();
break;
case ELEM_PATTERNS:
consumer.AddPattern(GetPattern(word),
GetInterletterValues(word));
break;
}
}
}
}
}