/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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 of the License, or
* (at your option) any later version.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
* Free SoftwareFoundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.jsp;
import com.caucho.vfs.Vfs;
import com.caucho.xml.QName;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
/**
* Generates the nodes for JSP code.
*/
public class JspContentHandler extends DefaultHandler {
private JspBuilder _builder;
private Locator _locator;
public JspContentHandler(JspBuilder builder)
{
_builder = builder;
}
/**
* Sets the document locator
*/
public void setDocumentLocator(Locator locator)
{
_locator = locator;
}
/**
* Starts the document.
*/
public void startDocument()
throws SAXException
{
try {
setLocation();
_builder.startDocument();
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Ends the document.
*/
public void endDocument()
throws SAXException
{
try {
setLocation();
_builder.endDocument();
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Adds characters.
*/
public void characters(char []buf, int offset, int length)
throws SAXException
{
try {
setLocation();
if (_builder.getGenerator().isELIgnore()
|| _builder.isTagDependent()) {
String s = new String(buf, offset, length);
_builder.text(s);
}
else
addText(buf, offset, length);
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Adds text, checking for JSP-EL
*/
private void addText(char []buf, int offset, int length)
throws JspParseException
{
int end = offset + length;
int begin = offset;
while (offset < end) {
if (buf[offset] != '$')
offset++;
else if (end <= offset + 1)
offset++;
else if (buf[offset + 1] != '{')
offset++;
else {
if (begin < offset)
_builder.text(new String(buf, begin, offset - begin));
begin = offset;
offset += 2;
while (offset < end && buf[offset] != '}') {
if (buf[offset] == '\'') {
for (offset++; offset < end && buf[offset] != '\''; offset++) {
}
if (offset < end)
offset++;
}
else if (buf[offset] == '"') {
for (offset++; offset < end && buf[offset] != '"'; offset++) {
}
if (offset < end)
offset++;
}
else
offset++;
}
if (offset < end)
offset++;
String value = new String(buf, begin, offset - begin);
QName qname = new QName("resin-c", "out", JspParser.JSTL_CORE_URI);
_builder.startElement(qname);
_builder.attribute(new QName("value"), value);
_builder.attribute(new QName("escapeXml"), "false");
_builder.endAttributes();
_builder.endElement("resin-c:out");
begin = offset;
}
}
if (begin < offset)
_builder.text(new String(buf, begin, offset - begin));
}
/**
* Starts a prefix mapping.
*/
public void startPrefixMapping(String prefix, String uri)
throws SAXException
{
try {
_builder.startPrefixMapping(prefix, uri);
} catch (JspParseException e) {
throw new SAXException(e);
}
/*
_builder.getParseState().pushNamespace(prefix, uri);
ParseTagManager manager = _builder.getTagManager();
*/
/*
try {
manager.addTaglib(prefix, uri);
} catch (JspParseException e) {
throw new SAXException(e);
}
*/
}
/**
* Ends a prefix mapping.
*/
public void endPrefixMapping(String prefix)
throws SAXException
{
_builder.getParseState().popNamespace(prefix);
ParseTagManager manager = _builder.getTagManager();
/*
try {
manager.addTaglib(prefix, uri);
} catch (JspParseException e) {
throw new SAXException(e);
}
*/
}
/**
* Starts an element.
*/
public void startElement(String uri, String localName,
String qName, Attributes atts)
throws SAXException
{
try {
setLocation();
_builder.startElement(new QName(qName, uri));
for (int i = 0; i < atts.getLength(); i++) {
setLocation();
_builder.attribute(new QName(atts.getQName(i), atts.getURI(i)),
atts.getValue(i));
}
setLocation();
_builder.endAttributes();
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Ends an element.
*/
public void endElement (String uri, String localName, String qName)
throws SAXException
{
try {
setLocation();
_builder.endElement(qName);
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Adds a processing instruction
*/
public void processingInstruction(String key, String value)
throws SAXException
{
try {
_builder.text("<?" + key + " " + value + "?>");
} catch (JspParseException e) {
throw new SAXException(e);
}
}
/**
* Sets the location.
*/
private void setLocation()
{
if (_locator != null) {
_builder.setLocation(Vfs.lookup(_locator.getSystemId()),
_locator.getSystemId(),
_locator.getLineNumber());
}
}
}