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/*
* Copyright (c) 2007 Henri Sivonen
* Copyright (c) 2008-2009 Mozilla Foundation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
package nu.validator.htmlparser.sax;
import nu.validator.htmlparser.impl.HtmlAttributes;
import nu.validator.htmlparser.impl.TreeBuilder;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.ext.LexicalHandler;
class SAXStreamer extends TreeBuilder<Attributes>{
private static final char[] ISINDEX_PROMPT = "This is a searchable index. Enter search keywords: ".toCharArray();
private ContentHandler contentHandler = null;
private LexicalHandler lexicalHandler = null;
SAXStreamer() {
super();
}
@Override
protected void addAttributesToElement(Attributes element, HtmlAttributes attributes) throws SAXException {
Attributes existingAttrs = element;
for (int i = 0; i < attributes.getLength(); i++) {
String qName = attributes.getQNameNoBoundsCheck(i);
if (existingAttrs.getIndex(qName) < 0) {
fatal();
}
}
}
@Override
protected void appendCharacters(Attributes parent, char[] buf, int start, int length) throws SAXException {
contentHandler.characters(buf, start, length);
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#appendIsindexPrompt(java.lang.Object)
*/
@Override protected void appendIsindexPrompt(Attributes parent)
throws SAXException {
contentHandler.characters(ISINDEX_PROMPT, 0, ISINDEX_PROMPT.length);
}
@Override
protected void appendChildrenToNewParent(Attributes oldParent, Attributes newParent) throws SAXException {
fatal();
}
@Override
protected void appendComment(Attributes parent, char[] buf, int start, int length) throws SAXException {
if (lexicalHandler != null) {
lexicalHandler.comment(buf, start, length);
}
}
@Override
protected void appendCommentToDocument(char[] buf, int start, int length)
throws SAXException {
if (lexicalHandler != null) {
lexicalHandler.comment(buf, start, length);
}
}
@Override
protected Attributes createElement(String ns, String name, HtmlAttributes attributes, Attributes intendedParent) throws SAXException {
return attributes;
}
@Override
protected Attributes createHtmlElementSetAsRoot(HtmlAttributes attributes) throws SAXException {
return attributes;
}
@Override
protected void detachFromParent(Attributes element) throws SAXException {
fatal();
}
@Override
protected void appendElement(Attributes child, Attributes newParent) throws SAXException {
}
@Override
protected boolean hasChildren(Attributes element) throws SAXException {
return false;
}
public void setContentHandler(ContentHandler handler) {
contentHandler = handler;
}
public void setLexicalHandler(LexicalHandler handler) {
lexicalHandler = handler;
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#appendDoctypeToDocument(java.lang.String, java.lang.String, java.lang.String)
*/
@Override
protected void appendDoctypeToDocument(String name, String publicIdentifier, String systemIdentifier) throws SAXException {
if (lexicalHandler != null) {
lexicalHandler.startDTD(name, publicIdentifier, systemIdentifier);
lexicalHandler.endDTD();
}
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#elementPopped(String, java.lang.String, java.lang.Object)
*/
@Override
protected void elementPopped(String ns, String name, Attributes node) throws SAXException {
contentHandler.endElement(ns, name, name);
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#elementPushed(String, java.lang.String, java.lang.Object)
*/
@Override
protected void elementPushed(String ns, String name, Attributes node) throws SAXException {
contentHandler.startElement(ns, name, name, node);
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#end()
*/
@Override
protected void end() throws SAXException {
contentHandler.endDocument();
}
/**
* @see nu.validator.htmlparser.impl.TreeBuilder#start()
*/
@Override
protected void start(boolean fragment) throws SAXException {
contentHandler.setDocumentLocator(tokenizer);
if (!fragment) {
contentHandler.startDocument();
}
}
protected void fatal() throws SAXException {
SAXParseException spe = new SAXParseException(
"Cannot recover after last error. Any further errors will be ignored.",
tokenizer);
if (errorHandler != null) {
errorHandler.fatalError(spe);
}
throw spe;
}
@Override
protected Attributes createAndInsertFosterParentedElement(String ns, String name,
HtmlAttributes attributes, Attributes table, Attributes stackParent) throws SAXException {
fatal();
throw new RuntimeException("Unreachable");
}
@Override protected void insertFosterParentedCharacters(char[] buf,
int start, int length, Attributes table, Attributes stackParent)
throws SAXException {
fatal();
}
@Override protected void insertFosterParentedChild(Attributes child,
Attributes table, Attributes stackParent) throws SAXException {
fatal();
}
}
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