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Diffstat (limited to 'libjava/classpath/javax/swing/text/html/parser/ParserDelegator.java')
| -rw-r--r-- | libjava/classpath/javax/swing/text/html/parser/ParserDelegator.java | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/libjava/classpath/javax/swing/text/html/parser/ParserDelegator.java b/libjava/classpath/javax/swing/text/html/parser/ParserDelegator.java new file mode 100644 index 000000000..cdd339b8f --- /dev/null +++ b/libjava/classpath/javax/swing/text/html/parser/ParserDelegator.java @@ -0,0 +1,207 @@ +/* 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 java.io.IOException; +import java.io.Reader; +import java.io.Serializable; + +import javax.swing.text.BadLocationException; +import javax.swing.text.SimpleAttributeSet; +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) + { + SimpleAttributeSet 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; + } +} |