nu.validator.spec.html5.ImageReportAdviceBuilder Maven / Gradle / Ivy
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An HTML-checking library (used by https://html5.validator.nu and the HTML5 facet of the W3C Validator)
/*
* Copyright (c) 2007-2012 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.spec.html5;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import nu.validator.htmlparser.common.XmlViolationPolicy;
import nu.validator.htmlparser.sax.HtmlParser;
import nu.validator.saxtree.DocumentFragment;
import nu.validator.saxtree.TreeBuilder;
import nu.validator.xml.AttributesImpl;
import nu.validator.xml.EmptyAttributes;
import org.xml.sax.Attributes;
import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
public class ImageReportAdviceBuilder implements ContentHandler {
private static final String NS = "http://www.w3.org/1999/xhtml";
private enum State {
AWAITING_H2, AWAITING_HEADLINE, IN_HEADLINE, AWAITING_H2_END, IN_PROSE
}
private State state = State.AWAITING_H2;
private int depth = 0;
private TreeBuilder treeBuilder;
private final List fragments = new LinkedList();
public static List parseAltAdvice()
throws IOException, SAXException {
HtmlParser parser = new HtmlParser(XmlViolationPolicy.ALTER_INFOSET);
ImageReportAdviceBuilder handler = new ImageReportAdviceBuilder();
parser.setContentHandler(handler);
InputSource in = new InputSource(
ImageReportAdviceBuilder.class.getClassLoader().getResourceAsStream(
"nu/validator/localentities/files/vnu-alt-advice"));
parser.parse(in);
return handler.getFragments();
}
public static void main(String[] args) throws IOException, SAXException {
parseAltAdvice();
}
private ImageReportAdviceBuilder() {
}
public void startDocument() throws SAXException {
state = State.AWAITING_H2;
}
public void startElement(String uri, String localName, String qName,
Attributes atts) throws SAXException {
switch (state) {
case AWAITING_H2:
if ("h2" == localName && NS == uri) {
depth = 0;
state = State.AWAITING_HEADLINE;
}
return;
case AWAITING_HEADLINE:
if (depth == 0 && "span" == localName && NS == uri
&& "mw-headline".equals(atts.getValue("", "class"))) {
state = State.IN_HEADLINE;
} else {
depth++;
}
return;
case IN_HEADLINE:
depth++;
return;
case AWAITING_H2_END:
depth++;
return;
case IN_PROSE:
String href = null;
if (NS == uri && "a" == localName) {
if ((href = atts.getValue("", "href")) != null) {
AttributesImpl ai = new AttributesImpl();
ai.addAttribute("href", href);
depth++;
treeBuilder.startElement(uri, localName, qName, ai);
}
} else if (NS == uri && "div" == localName
&& ("printfooter".equals(atts.getValue("", "class")))) {
fragments.add((DocumentFragment) treeBuilder.getRoot());
treeBuilder = null;
state = State.AWAITING_H2;
} else if (depth == 0 && "h2" == localName && NS == uri) {
fragments.add((DocumentFragment) treeBuilder.getRoot());
treeBuilder = null;
depth = 0;
state = State.AWAITING_HEADLINE;
} else {
depth++;
treeBuilder.startElement(uri, localName, qName,
EmptyAttributes.EMPTY_ATTRIBUTES);
}
}
}
public void endElement(String uri, String localName, String qName)
throws SAXException {
switch (state) {
case AWAITING_H2:
return;
case AWAITING_HEADLINE:
if (depth == 0) {
state = State.AWAITING_H2;
} else {
depth--;
}
return;
case IN_HEADLINE:
if (depth == 0) {
state = State.AWAITING_H2_END;
} else {
depth--;
}
return;
case AWAITING_H2_END:
if (depth == 0) {
treeBuilder = new TreeBuilder(true, true);
state = State.IN_PROSE;
} else {
depth--;
}
return;
case IN_PROSE:
depth--;
treeBuilder.endElement(uri, localName, qName);
return;
}
}
/**
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
*/
public void characters(char[] ch, int start, int length)
throws SAXException {
if (depth < 0) {
return;
}
switch (state) {
case IN_PROSE:
treeBuilder.characters(ch, start, length);
return;
default:
return;
}
}
public void endDocument() throws SAXException {
}
public void endPrefixMapping(String prefix) throws SAXException {
}
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
}
public void processingInstruction(String target, String data)
throws SAXException {
}
public void setDocumentLocator(Locator locator) {
}
public void skippedEntity(String name) throws SAXException {
}
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
}
/**
* Returns the fragments.
*
* @return the fragments
*/
private List getFragments() {
return fragments;
}
}