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-/* ParserDelegator.java -- Delegator for ParserDocument.
- 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.html.parser;
-
-import gnu.javax.swing.text.html.parser.HTML_401F;
-import gnu.javax.swing.text.html.parser.htmlAttributeSet;
-
-import java.io.IOException;
-import java.io.Reader;
-import java.io.Serializable;
-
-import javax.swing.text.BadLocationException;
-import javax.swing.text.html.HTMLEditorKit;
-import javax.swing.text.html.HTMLEditorKit.ParserCallback;
-
-/**
- * This class instantiates and starts the working instance of
- * html parser, being responsible for providing the default DTD.
- *
- * TODO Later this class must be derived from the totally abstract class
- * HTMLEditorKit.Parser. HTMLEditorKit that does not yet exist.
- *
- * @author Audrius Meskauskas (AudriusA@Bioinformatics.org)
- */
-public class ParserDelegator
- extends javax.swing.text.html.HTMLEditorKit.Parser
- implements Serializable
-{
- private class gnuParser
- extends gnu.javax.swing.text.html.parser.support.Parser
- {
- private static final long serialVersionUID = 1;
-
- private gnuParser(DTD d)
- {
- super(d);
- }
-
- protected final void handleComment(char[] comment)
- {
- callBack.handleComment(comment, hTag.where.startPosition);
- }
-
- protected final void handleEmptyTag(TagElement tag)
- throws javax.swing.text.ChangedCharSetException
- {
- callBack.handleSimpleTag(tag.getHTMLTag(), getAttributes(),
- hTag.where.startPosition
- );
- }
-
- protected final void handleEndTag(TagElement tag)
- {
- callBack.handleEndTag(tag.getHTMLTag(), hTag.where.startPosition);
- }
-
- protected final void handleError(int line, String message)
- {
- callBack.handleError(message, hTag.where.startPosition);
- }
-
- protected final void handleStartTag(TagElement tag)
- {
- htmlAttributeSet attributes = gnu.getAttributes();
-
- if (tag.fictional())
- attributes.addAttribute(ParserCallback.IMPLIED, Boolean.TRUE);
-
- callBack.handleStartTag(tag.getHTMLTag(), attributes,
- hTag.where.startPosition
- );
- }
-
- protected final void handleText(char[] text)
- {
- callBack.handleText(text, hTag.where.startPosition);
- }
-
- DTD getDTD()
- {
- return dtd;
- }
- }
-
- /**
- * Use serialVersionUID for interoperability.
- */
- private static final long serialVersionUID = -1276686502624777206L;
-
- private static DTD dtd = HTML_401F.getInstance();
-
- /**
- * The callback.
- * This is package-private to avoid an accessor method.
- */
- HTMLEditorKit.ParserCallback callBack;
-
- /**
- * The reference to the working class of HTML parser that is
- * actually used to parse the document.
- * This is package-private to avoid an accessor method.
- */
- gnuParser gnu;
-
- /**
- * Parses the HTML document, calling methods of the provided
- * callback. This method must be multithread - safe.
- * @param reader The reader to read the HTML document from
- * @param callback The callback that is notifyed about the presence
- * of HTML elements in the document.
- * @param ignoreCharSet If thrue, any charset changes during parsing
- * are ignored.
- * @throws java.io.IOException
- */
- public void parse(Reader reader, HTMLEditorKit.ParserCallback a_callback,
- boolean ignoreCharSet
- )
- throws IOException
- {
- callBack = a_callback;
-
- if (gnu == null || !dtd.equals(gnu.getDTD()))
- {
- gnu = new gnuParser(dtd);
- }
-
- gnu.parse(reader);
-
- callBack.handleEndOfLineString(gnu.getEndOfLineSequence());
- try
- {
- callBack.flush();
- }
- catch (BadLocationException ex)
- {
- // Convert this into the supported type of exception.
- throw new IOException(ex.getMessage());
- }
- }
-
- /**
- * Calling this method instructs that, if not specified directly,
- * the documents will be parsed using the default
- * DTD of the implementation.
- */
- protected static void setDefaultDTD()
- {
- dtd = HTML_401F.getInstance();
- }
-
- /**
- * Registers the user - written DTD under the given name, also
- * making it default for the subsequent parsings. This has effect on
- * all subsequent calls to the parse(...) . If you need to specify
- * your DTD locally, simply {@link javax.swing.text.html.parser.Parser}
- * instead.
- * @param dtd The DTD that will be used to parse documents by this class.
- * @param name The name of this DTD.
- * @return No standard is specified on which instance of DTD must be
- * returned by this method, and it is recommended to leave the returned
- * value without consideration. This implementation returns the DTD
- * that was previously set as the default DTD, or the implementations
- * default DTD if none was set.
- */
- protected static DTD createDTD(DTD a_dtd, String name)
- {
- DTD.putDTDHash(name, a_dtd);
-
- DTD dtd_prev = dtd;
- dtd = a_dtd;
- return dtd_prev;
- }
-}