/*
*
* 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,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: sales@itextpdf.com
*/
package com.itextpdf.text.pdf.hyphenation;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Map;
import java.util.StringTokenizer;
import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.xml.simpleparser.SimpleXMLDocHandler;
import com.itextpdf.text.xml.simpleparser.SimpleXMLParser;
/** Parses the xml hyphenation pattern.
*
* @author Paulo Soares
*/
public class SimplePatternParser implements SimpleXMLDocHandler,
PatternConsumer {
int currElement;
PatternConsumer consumer;
StringBuffer token;
ArrayList<Object> 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<Object> normalizeException(ArrayList<Object> ex) {
ArrayList<Object> res = new ArrayList<Object>();
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<Object> 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() {
}
@SuppressWarnings("unchecked")
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<Object>) 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, Map<String, String> h) {
if (tag.equals("hyphen-char")) {
String hh = 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<Object>();
} else if (tag.equals("hyphen")) {
if (token.length() > 0) {
exception.add(token.toString());
}
exception.add(new Hyphen(h.get("pre"), h
.get("no"), h.get("post")));
currElement = ELEM_HYPHEN;
}
token.setLength(0);
}
@SuppressWarnings("unchecked")
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<Object>) 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<Object> 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();
}
}
*/
}