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// This file is part of TagSoup and is Copyright 2002-2008 by John Cowan.
//
// TagSoup is licensed under the Apache License,
// Version 2.0. You may obtain a copy of this license at
// http://www.apache.org/licenses/LICENSE-2.0 . You may also have
// additional legal rights not granted by this license.
//
// TagSoup is distributed in the hope that it will be useful, but
// unless required by applicable law or agreed to in writing, TagSoup
// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
// OF ANY KIND, either express or implied; not even the implied warranty
// of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
//
//
// PYX Writer
// FIXME: does not do escapes in attribute values
// FIXME: outputs entities as bare '&' character
package org.ccil.cowan.tagsoup;
import java.io.*;
import org.xml.sax.*;
import org.xml.sax.ext.LexicalHandler;
/**
A ContentHandler that generates PYX format instead of XML.
Primarily useful for debugging.
**/
public class PYXWriter
implements ScanHandler, ContentHandler, LexicalHandler {
private PrintWriter theWriter; // where we write to
private static char[] dummy = new char[1];
private String attrName; // saved attribute name
// ScanHandler implementation
public void adup(char[] buff, int offset, int length) throws SAXException {
theWriter.println(attrName);
attrName = null;
}
public void aname(char[] buff, int offset, int length) throws SAXException {
theWriter.print('A');
theWriter.write(buff, offset, length);
theWriter.print(' ');
attrName = new String(buff, offset, length);
}
public void aval(char[] buff, int offset, int length) throws SAXException {
theWriter.write(buff, offset, length);
theWriter.println();
attrName = null;
}
public void cmnt(char [] buff, int offset, int length) throws SAXException {
// theWriter.print('!');
// theWriter.write(buff, offset, length);
// theWriter.println();
}
public void entity(char[] buff, int offset, int length) throws SAXException { }
public int getEntity() { return 0; }
public void eof(char[] buff, int offset, int length) throws SAXException {
theWriter.close();
}
public void etag(char[] buff, int offset, int length) throws SAXException {
theWriter.print(')');
theWriter.write(buff, offset, length);
theWriter.println();
}
public void decl(char[] buff, int offset, int length) throws SAXException {
}
public void gi(char[] buff, int offset, int length) throws SAXException {
theWriter.print('(');
theWriter.write(buff, offset, length);
theWriter.println();
}
public void cdsect(char[] buff, int offset, int length) throws SAXException {
pcdata(buff, offset, length);
}
public void pcdata(char[] buff, int offset, int length) throws SAXException {
if (length == 0) return; // nothing to do
boolean inProgress = false;
length += offset;
for (int i = offset; i < length; i++) {
if (buff[i] == '\n') {
if (inProgress) {
theWriter.println();
}
theWriter.println("-\\n");
inProgress = false;
}
else {
if (!inProgress) {
theWriter.print('-');
}
switch(buff[i]) {
case '\t':
theWriter.print("\\t");
break;
case '\\':
theWriter.print("\\\\");
break;
default:
theWriter.print(buff[i]);
}
inProgress = true;
}
}
if (inProgress) {
theWriter.println();
}
}
public void pitarget(char[] buff, int offset, int length) throws SAXException {
theWriter.print('?');
theWriter.write(buff, offset, length);
theWriter.write(' ');
}
public void pi(char[] buff, int offset, int length) throws SAXException {
theWriter.write(buff, offset, length);
theWriter.println();
}
public void stagc(char[] buff, int offset, int length) throws SAXException {
// theWriter.println("!"); // FIXME
}
public void stage(char[] buff, int offset, int length) throws SAXException {
theWriter.println("!"); // FIXME
}
// SAX ContentHandler implementation
public void characters(char[] buff, int offset, int length) throws SAXException {
pcdata(buff, offset, length);
}
public void endDocument() throws SAXException {
theWriter.close();
}
public void endElement(String uri, String localname, String qname) throws SAXException {
if (qname.length() == 0) qname = localname;
theWriter.print(')');
theWriter.println(qname);
}
public void endPrefixMapping(String prefix) throws SAXException { }
public void ignorableWhitespace(char[] buff, int offset, int length) throws SAXException {
characters(buff, offset, length);
}
public void processingInstruction(String target, String data) throws SAXException {
theWriter.print('?');
theWriter.print(target);
theWriter.print(' ');
theWriter.println(data);
}
public void setDocumentLocator(Locator locator) { }
public void skippedEntity(String name) throws SAXException { }
public void startDocument() throws SAXException { }
public void startElement(String uri, String localname, String qname,
Attributes atts) throws SAXException {
if (qname.length() == 0) qname=localname;
theWriter.print('(');
theWriter.println(qname);
int length = atts.getLength();
for (int i = 0; i < length; i++) {
qname = atts.getQName(i);
if (qname.length() == 0) qname = atts.getLocalName(i);
theWriter.print('A');
// theWriter.print(atts.getType(i)); // DEBUG
theWriter.print(qname);
theWriter.print(' ');
theWriter.println(atts.getValue(i));
}
}
public void startPrefixMapping(String prefix, String uri) throws SAXException { }
// Default LexicalHandler implementation
public void comment(char[] ch, int start, int length) throws SAXException {
cmnt(ch, start, length);
}
public void endCDATA() throws SAXException { }
public void endDTD() throws SAXException { }
public void endEntity(String name) throws SAXException { }
public void startCDATA() throws SAXException { }
public void startDTD(String name, String publicId, String systemId) throws SAXException { }
public void startEntity(String name) throws SAXException { }
// Constructor
public PYXWriter(Writer w) {
if (w instanceof PrintWriter) {
theWriter = (PrintWriter)w;
}
else {
theWriter = new PrintWriter(w);
}
}
}
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