/**
*
*/
package org.richfaces.renderkit;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Properties;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Result;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.sax.SAXResult;
import org.ajax4jsf.webapp.tidy.TidyParser;
import org.ajax4jsf.webapp.tidy.TidyXMLFilter;
import org.ajax4jsf.renderkit.HeaderResourcesRendererBase;
import org.richfaces.component.TemplateComponent;
import org.richfaces.json.JSContentHandler;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* @author Nick Belaevski - mailto:nbelaevski@exadel.com
* created 22.06.2007
*
*/
public abstract class TemplateEncoderRendererBase extends HeaderResourcesRendererBase {
private static TransformerFactory transformerFactory;
private static TransformerFactory getTransformerFactory() {
synchronized (TemplateEncoderRendererBase.class) {
if (transformerFactory == null) {
transformerFactory = TransformerFactory.newInstance();
}
}
return transformerFactory;
}
public final boolean getRendersChildren() {
return true;
}
private void writeScriptBody(ResponseWriter writer, String string) throws IOException {
Properties tidyProperties = new Properties();
InputStream propertiesStream = null;
try {
propertiesStream = TidyXMLFilter.class.getResourceAsStream("tidy.properties");
tidyProperties.load(propertiesStream);
} finally {
if (propertiesStream != null) {
propertiesStream.close();
}
}
TidyParser tidyParser = new TidyParser(tidyProperties);
Document parsedHtml = tidyParser.parseHtmlByTidy(new StringReader(string), null);
NodeList nodeList = parsedHtml.getDocumentElement().getChildNodes();
Node bodyNode = nodeList.item(nodeList.getLength() - 1);
NodeList bodyChildren = bodyNode.getChildNodes();
int bodyChildrenLength = bodyChildren.getLength();
writer.write("[");
try {
Transformer transformer;
TransformerFactory factory = getTransformerFactory();
synchronized (factory) {
transformer = factory.newTransformer();
}
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
JSContentHandler contentHandler = new MacroDefinitionJSContentHandler(writer, "Richfaces.evalMacro(\"", "\", context)");
Result result = new SAXResult(contentHandler);
for (int i = 0; i < bodyChildrenLength; i++) {
if (i != 0) {
writer.write(", ");
}
transformer.transform(new DOMSource(bodyChildren.item(i)), result);
}
} catch (TransformerException e) {
throw new IOException(e.getMessage());
}
writer.write("]");
}
protected void writeScriptBody(FacesContext context, UIComponent component, boolean children)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
StringWriter dumpingWriter = new StringWriter();
ResponseWriter clonedWriter = writer.cloneWithWriter(dumpingWriter);
context.setResponseWriter(clonedWriter);
TemplateComponent templateComponent = null;
if (component instanceof TemplateComponent) {
templateComponent = (TemplateComponent) component;
}
try {
if (templateComponent != null) {
templateComponent.startTemplateEncode();
}
if (children) {
this.renderChildren(context, component);
} else {
this.renderChild(context, component);
}
} finally {
if (templateComponent != null) {
templateComponent.endTemplateEncode();
}
clonedWriter.flush();
context.setResponseWriter(writer);
}
writeScriptBody(writer, dumpingWriter.toString());
}
public void encodeChildren(FacesContext context, UIComponent component)
throws IOException {
ResponseWriter writer = context.getResponseWriter();
writer.startElement("script", component);
writer.write("var evaluator = ");
writeScriptBody(context, component, true);
writer.write(";\n new Insertion.Top($('" + component.getClientId(context) + "'), evaluator.invoke('getContent', window).join(''));");
writer.endElement("script");
}
}