// Copyright 2007 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.tapestry.internal.services;
import static org.apache.tapestry.ioc.internal.util.CollectionFactory.newList;
import java.util.List;
import org.apache.tapestry.dom.Document;
import org.apache.tapestry.dom.Element;
import org.apache.tapestry.ioc.internal.util.InternalUtils;
public class DocumentScriptBuilderImpl implements DocumentScriptBuilder
{
private final List<String> _scripts = newList();
private final StringBuilder _scriptBlock = new StringBuilder();
public void addScriptLink(String scriptURL)
{
if (_scripts.contains(scriptURL))
return;
_scripts.add(scriptURL);
}
public void addScript(String script)
{
if (InternalUtils.isBlank(script))
return;
_scriptBlock.append(script);
_scriptBlock.append("\n");
}
public void updateDocument(Document document)
{
Element body = document.find("html/body");
if (body == null)
return;
for (int i = 0; i < _scripts.size(); i++)
{
String scriptURL = _scripts.get(i);
body.elementAt(i, "script", "src", scriptURL, "type", "text/javascript");
}
if (_scriptBlock.length() > 0)
{
Element e = body.element("script", "type", "text/javascript", "language", "javascript");
e.raw("\n<!--\n");
// This assumes that Prototype is available.
e.text("Event.observe(window, \"load\", function() {\n");
e.text(_scriptBlock.toString());
e.text("});\n");
e.raw("// -->\n");
}
}
}