diff options
Diffstat (limited to 'src/main/java/com/lowagie/text/pdf/PdfContentParser.java')
| -rw-r--r-- | src/main/java/com/lowagie/text/pdf/PdfContentParser.java | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/main/java/com/lowagie/text/pdf/PdfContentParser.java b/src/main/java/com/lowagie/text/pdf/PdfContentParser.java new file mode 100644 index 0000000..af731bc --- /dev/null +++ b/src/main/java/com/lowagie/text/pdf/PdfContentParser.java @@ -0,0 +1,204 @@ +/*
+ * $Id: PdfContentParser.java,v 1.4 2006/05/27 11:11:54 psoares33 Exp $
+ *
+ * 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;
+
+import java.io.IOException;
+import java.util.ArrayList;
+/**
+ * Parses the page or template content.
+ * @author Paulo Soares (psoares@consiste.pt)
+ */
+public class PdfContentParser {
+
+ /**
+ * Commands have this type.
+ */
+ public static final int COMMAND_TYPE = 200;
+ /**
+ * Holds value of property tokeniser.
+ */
+ private PRTokeniser tokeniser;
+
+ /**
+ * Creates a new instance of PdfContentParser
+ * @param tokeniser the tokeniser with the content
+ */
+ public PdfContentParser(PRTokeniser tokeniser) {
+ this.tokeniser = tokeniser;
+ }
+
+ /**
+ * Parses a single command from the content. Each command is output as an array of arguments
+ * having the command itself as the last element. The returned array will be empty if the
+ * end of content was reached.
+ * @param ls an <CODE>ArrayList</CODE> to use. It will be cleared before using. If it's
+ * <CODE>null</CODE> will create a new <CODE>ArrayList</CODE>
+ * @return the same <CODE>ArrayList</CODE> given as argument or a new one
+ * @throws IOException on error
+ */
+ public ArrayList parse(ArrayList ls) throws IOException {
+ if (ls == null)
+ ls = new ArrayList();
+ else
+ ls.clear();
+ PdfObject ob = null;
+ while ((ob = readPRObject()) != null) {
+ ls.add(ob);
+ if (ob.type() == COMMAND_TYPE)
+ break;
+ }
+ return ls;
+ }
+
+ /**
+ * Gets the tokeniser.
+ * @return the tokeniser.
+ */
+ public PRTokeniser getTokeniser() {
+ return this.tokeniser;
+ }
+
+ /**
+ * Sets the tokeniser.
+ * @param tokeniser the tokeniser
+ */
+ public void setTokeniser(PRTokeniser tokeniser) {
+ this.tokeniser = tokeniser;
+ }
+
+ /**
+ * Reads a dictionary. The tokeniser must be positioned past the "<<" token.
+ * @return the dictionary
+ * @throws IOException on error
+ */
+ public PdfDictionary readDictionary() throws IOException {
+ PdfDictionary dic = new PdfDictionary();
+ while (true) {
+ if (!nextValidToken())
+ throw new IOException("Unexpected end of file.");;
+ if (tokeniser.getTokenType() == PRTokeniser.TK_END_DIC)
+ break;
+ if (tokeniser.getTokenType() != PRTokeniser.TK_NAME)
+ throw new IOException("Dictionary key is not a name.");
+ PdfName name = new PdfName(tokeniser.getStringValue(), false);
+ PdfObject obj = readPRObject();
+ int type = obj.type();
+ if (-type == PRTokeniser.TK_END_DIC)
+ throw new IOException("Unexpected '>>'");
+ if (-type == PRTokeniser.TK_END_ARRAY)
+ throw new IOException("Unexpected ']'");
+ dic.put(name, obj);
+ }
+ return dic;
+ }
+
+ /**
+ * Reads an array. The tokeniser must be positioned past the "[" token.
+ * @return an array
+ * @throws IOException on error
+ */
+ public PdfArray readArray() throws IOException {
+ PdfArray array = new PdfArray();
+ while (true) {
+ PdfObject obj = readPRObject();
+ int type = obj.type();
+ if (-type == PRTokeniser.TK_END_ARRAY)
+ break;
+ if (-type == PRTokeniser.TK_END_DIC)
+ throw new IOException("Unexpected '>>'");
+ array.add(obj);
+ }
+ return array;
+ }
+
+ /**
+ * Reads a pdf object.
+ * @return the pdf object
+ * @throws IOException on error
+ */
+ public PdfObject readPRObject() throws IOException {
+ if (!nextValidToken())
+ return null;
+ int type = tokeniser.getTokenType();
+ switch (type) {
+ case PRTokeniser.TK_START_DIC: {
+ PdfDictionary dic = readDictionary();
+ return dic;
+ }
+ case PRTokeniser.TK_START_ARRAY:
+ return readArray();
+ case PRTokeniser.TK_STRING:
+ PdfString str = new PdfString(tokeniser.getStringValue(), null).setHexWriting(tokeniser.isHexString());
+ return str;
+ case PRTokeniser.TK_NAME:
+ return new PdfName(tokeniser.getStringValue(), false);
+ case PRTokeniser.TK_NUMBER:
+ return new PdfNumber(tokeniser.getStringValue());
+ case PRTokeniser.TK_OTHER:
+ return new PdfLiteral(COMMAND_TYPE, tokeniser.getStringValue());
+ default:
+ return new PdfLiteral(-type, tokeniser.getStringValue());
+ }
+ }
+
+ /**
+ * Reads the next token skipping over the comments.
+ * @return <CODE>true</CODE> if a token was read, <CODE>false</CODE> if the end of content was reached
+ * @throws IOException on error
+ */
+ public boolean nextValidToken() throws IOException {
+ while (tokeniser.nextToken()) {
+ if (tokeniser.getTokenType() == PRTokeniser.TK_COMMENT)
+ continue;
+ return true;
+ }
+ return false;
+ }
+}
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