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Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/hyphenation/SimplePatternParser.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/hyphenation/SimplePatternParser.java | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/hyphenation/SimplePatternParser.java b/src/main/java/com/lowagie/text/pdf/hyphenation/SimplePatternParser.java new file mode 100644 index 0000000..ade8885 --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/hyphenation/SimplePatternParser.java @@ -0,0 +1,278 @@ +/*
+ * 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/
+ */
+
+package com.lowagie.text.pdf.hyphenation;
+
+import com.lowagie.text.pdf.*;
+import com.lowagie.text.ExceptionConverter;
+import java.util.ArrayList;
+import java.util.StringTokenizer;
+import java.io.InputStream;
+import java.io.IOException;
+import java.io.FileInputStream;
+
+/** 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("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();
+ }
+ }
+}
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