/*
* 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.
*
* Contributions by:
* Lubos Strapko
*
* 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/
*/
package com.lowagie.text.pdf.hyphenation;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.StringTokenizer;
import com.lowagie.text.ExceptionConverter;
import com.lowagie.text.html.HtmlTags;
import com.lowagie.text.xml.simpleparser.SimpleXMLDocHandler;
import com.lowagie.text.xml.simpleparser.SimpleXMLParser;
/** Parses the xml hyphenation pattern.
*
* @author Paulo Soares (psoares@consiste.pt)
*/
public class SimplePatternParser implements SimpleXMLDocHandler,
PatternConsumer {
int currElement;
PatternConsumer consumer;
StringBuffer token;
ArrayList exception;
char hyphenChar;
SimpleXMLParser parser;
static final int ELEM_CLASSES = 1;
static final int ELEM_EXCEPTIONS = 2;
static final int ELEM_PATTERNS = 3;
static final int ELEM_HYPHEN = 4;
/** Creates a new instance of PatternParser2 */
public SimplePatternParser() {
token = new StringBuffer();
hyphenChar = '-'; // default
}
public void parse(InputStream stream, PatternConsumer consumer) {
this.consumer = consumer;
try {
SimpleXMLParser.parse(this, stream);
} catch (IOException e) {
throw new ExceptionConverter(e);
} finally {
try {
stream.close();
} catch (Exception e) {
}
}
}
protected static String getPattern(String word) {
StringBuffer pat = new StringBuffer();
int len = word.length();
for (int i = 0; i < len; i++) {
if (!Character.isDigit(word.charAt(i))) {
pat.append(word.charAt(i));
}
}
return pat.toString();
}
protected ArrayList normalizeException(ArrayList ex) {
ArrayList res = new ArrayList();
for (int i = 0; i < ex.size(); i++) {
Object item = ex.get(i);
if (item instanceof String) {
String str = (String) item;
StringBuffer buf = new StringBuffer();
for (int j = 0; j < str.length(); j++) {
char c = str.charAt(j);
if (c != hyphenChar) {
buf.append(c);
} else {
res.add(buf.toString());
buf.setLength(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) {
StringBuffer res = new StringBuffer();
for (int i = 0; i < ex.size(); i++) {
Object item = ex.get(i);
if (item instanceof 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) {
StringBuffer il = new StringBuffer();
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.charAt(i);
if (Character.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.setLength(0);
}
}
if (currElement == ELEM_HYPHEN) {
currElement = ELEM_EXCEPTIONS;
} else {
currElement = 0;
}
}
public void startDocument() {
}
public void startElement(String tag, java.util.HashMap h) {
if (tag.equals("hyphen-char")) {
String hh = (String) h.get("value");
if (hh != null && hh.length() == 1) {
hyphenChar = hh.charAt(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.get(HtmlTags.PRE), (String) h
.get("no"), (String) h.get("post")));
currElement = ELEM_HYPHEN;
}
token.setLength(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;
}
}
}
// PatternConsumer implementation for testing purposes
public void addClass(String c) {
System.out.println("class: " + c);
}
public void addException(String w, ArrayList e) {
System.out.println("exception: " + w + " : " + e.toString());
}
public void addPattern(String p, String v) {
System.out.println("pattern: " + p + " : " + v);
}
public static void main(String[] args) throws Exception {
try {
if (args.length > 0) {
SimplePatternParser pp = new SimplePatternParser();
pp.parse(new FileInputStream(args[0]), pp);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}