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Diffstat (limited to 'libjava/classpath/javax/swing/text/rtf/RTFParser.java')
| -rw-r--r-- | libjava/classpath/javax/swing/text/rtf/RTFParser.java | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/text/rtf/RTFParser.java b/libjava/classpath/javax/swing/text/rtf/RTFParser.java new file mode 100644 index 000000000..3306056ff --- /dev/null +++ b/libjava/classpath/javax/swing/text/rtf/RTFParser.java @@ -0,0 +1,203 @@ +/* RTFParser.java -- + Copyright (C) 2005 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package javax.swing.text.rtf; + +import java.io.IOException; +import java.io.InputStream; +import java.io.Reader; + +import javax.swing.text.BadLocationException; +import javax.swing.text.Document; + +/** + * Parses an RTF file into a {@link Document}. The parser utilizes + * {@link RTFScanner}. + * + * @author Roman Kennke (roman@ontographics.com) + */ +class RTFParser +{ + + /** + * Our scanner. + */ + private RTFScanner scanner; + + /** + * The document into which we parse. + */ + private Document doc; + + /** + * The current position. + */ + private int pos; + + /** + * Constructs a new RTFParser for the specified document and position, + * without initializing the scanner. This is only used internally. + * + * @param doc the {@link Document} into which we should parse + * @param pos the position to start + */ + private RTFParser(Document doc, int pos) + { + this.doc = doc; + this.pos = pos; + } + + /** + * Constructs a new RTFParser for the specified <code>stream</code>. + * + * @param stream the stream from which we parse + * @param doc the {@link Document} into which we should parse + * @param pos the position to start + */ + public RTFParser(InputStream stream, Document doc, int pos) + { + this(doc, pos); + scanner = new RTFScanner(stream); + } + + /** + * Constructs a new RTFParser for the specified <code>reader</code>. + * + * @param reader the reader from which we parse + * @param doc the {@link Document} into which we should parse + * @param pos the position to start + */ + public RTFParser(Reader reader, Document doc, int pos) + { + this(doc, pos); + scanner = new RTFScanner(reader); + } + + /** + * Returns the {@link Document} in which we parsed the RTF data. + * + * @return the {@link Document} in which we parsed the RTF data + */ + public Document getDocument() + { + return doc; + } + + /** + * Starts the parsing process. + */ + public void parse() + throws IOException, BadLocationException + { + parseFile(); + } + + /** + * The parse rules for <file>. + */ + private void parseFile() + throws IOException, BadLocationException + { + Token t1 = scanner.readToken(); + if (t1.type != Token.LCURLY) + throw new RTFParseException("expected left curly braces"); + + parseHeader(); + parseDocument(); + + Token t2 = scanner.peekToken(); + if (t2.type == Token.RCURLY) + { + // Eat the token. + scanner.readToken(); + } + else + { + // Ignore this for maximum robustness when file is broken. + System.err.println("RTF warning: expected right curly braces"); + } + + } + + /** + * The parse rules for <header>. + * + * TODO: implement this properly + */ + private void parseHeader() + //throws IOException, BadLocationException + { + // TODO add parse rules here + } + + + /** + * The parse rules for <document>. + * + * TODO: implement this properly + */ + private void parseDocument() + throws IOException, BadLocationException + { + // !!! TODO !!! + // This simply emits every TEXT Token as text to the document + // which is plain stupid + + boolean eof = false; + + do { + Token token = scanner.readToken(); + switch (token.type) + { + case Token.TEXT: + TextToken textToken = (TextToken) token; + doc.insertString(pos, textToken.text, null); + pos += textToken.text.length(); + break; + case Token.EOF: + eof = true; + break; + default: + // FIXME + break; + } + } while (!eof); + + } + +} |