| /* 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. |
| * |
| * @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() |
| { |
| // Accessing the inherited gnu.javax.swing.text.html.parser.support.Parser |
| // field. super. is a workaround, required to support JDK1.3's javac. |
| return super.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 a_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 a_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; |
| } |
| } |