// Copyright 2012 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.apache.tapestry5.internal.services;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.dom.Document;
import org.apache.tapestry5.dom.Element;
import org.apache.tapestry5.services.MarkupRenderer;
import org.apache.tapestry5.services.MarkupRendererFilter;
import org.apache.tapestry5.services.RequestGlobals;
/**
* Injects a {@code <meta/>} element into the {@code <head/>} to identify the Tapestry page name.
* This filter is only active during development, not production.
*
* @since 5.4
*/
public class PageNameMetaInjector implements MarkupRendererFilter
{
private final RequestGlobals globals;
public PageNameMetaInjector(RequestGlobals globals)
{
this.globals = globals;
}
public void renderMarkup(MarkupWriter writer, MarkupRenderer delegate)
{
delegate.renderMarkup(writer);
String pageName = globals.getActivePageName();
Document document = writer.getDocument();
Element element = document.find("html/head");
if (element != null)
{
element.element("meta",
"name", "tapestry-page-name",
"content", pageName);
}
}
}