/*
* Copyright (c) 2007 Adobe Systems Incorporated
*
* 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 com.adobe.epubcheck.dtbook;
import com.adobe.epubcheck.messages.MessageId;
import com.adobe.epubcheck.messages.MessageLocation;
import com.adobe.epubcheck.opf.XRefChecker;
import com.adobe.epubcheck.ops.OPSHandler;
import com.adobe.epubcheck.util.FeatureEnum;
import com.adobe.epubcheck.util.HandlerUtil;
import com.adobe.epubcheck.util.PathUtil;
import com.adobe.epubcheck.xml.XMLElement;
import com.adobe.epubcheck.xml.XMLHandler;
import com.adobe.epubcheck.xml.XMLParser;
public class DTBookHandler implements XMLHandler
{
private final XMLParser parser;
private final String path;
private final XRefChecker xrefChecker;
private boolean checkedUnsupportedXmlVersion = false;
DTBookHandler(XMLParser parser, String path, XRefChecker xrefChecker)
{
this.parser = parser;
this.path = path;
this.xrefChecker = xrefChecker;
}
public void characters(char[] chars, int arg1, int arg2)
{
// do nothing
}
public void ignorableWhitespace(char[] chars, int arg1, int arg2)
{
// do nothing
}
public void startElement()
{
if (!checkedUnsupportedXmlVersion)
{
HandlerUtil.checkXMLVersion(parser);
checkedUnsupportedXmlVersion = true;
}
XMLElement e = parser.getCurrentElement();
String ns = e.getNamespace();
String name = e.getName();
String id = e.getAttribute("id");
if (ns.equals("http://www.daisy.org/z3986/2005/dtbook/"))
{
// link@href, a@href, img@src
String uri = null;
/*
* This section checks to see if the references used are registered
* schema-types and whether they point to external resources. The
* resources are only allowed to be external if the attribute
* "external" is set to true.
*/
if (name.equals("a"))
{
uri = e.getAttribute("href");
String external = e.getAttribute("external");
if (uri != null && external.equals("true"))
{
if (OPSHandler.isRegisteredSchemeType(uri))
{
uri = null;
}
else if (uri.indexOf(':') > 0)
{
parser.getReport().message(MessageId.OPF_021,
new MessageLocation(path, parser.getLineNumber(), parser.getColumnNumber()),
uri);
uri = null;
}
}
}
else if (name.equals("link"))
{
uri = e.getAttribute("href");
}
else if (name.equals("img"))
{
uri = e.getAttribute("src");
}
if (uri != null)
{
//TODO check if dtbook uses xml:base of so set third param
uri = PathUtil.resolveRelativeReference(path, uri, null);
xrefChecker.registerReference(path, parser.getLineNumber(),
parser.getColumnNumber(), uri,
name.equals("img") ? XRefChecker.RT_IMAGE
: XRefChecker.RT_HYPERLINK);
if (uri.startsWith("http"))
{
parser.getReport().info(path, FeatureEnum.REFERENCE, uri);
}
}
if (id != null)
{
xrefChecker.registerAnchor(path, parser.getLineNumber(),
parser.getColumnNumber(), id, XRefChecker.RT_HYPERLINK);
}
}
}
public void endElement()
{
// do nothing
}
public void processingInstruction(String arg0, String arg1)
{
// do nothing
}
}