/*
* Copyright (c) 2011 PonySDK
* Owners:
* Luciano Broussal <luciano.broussal AT gmail.com>
* Mathieu Barbier <mathieu.barbier AT gmail.com>
* Nicolas Ciaravola <nicolas.ciaravola.pro AT gmail.com>
*
* WebSite:
* http://code.google.com/p/pony-sdk/
*
* 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 com.ponysdk.ui.server.basic;
import com.ponysdk.core.UIContext;
import com.ponysdk.ui.terminal.WidgetType;
/**
* A singleton implementation of {@link PLayoutPanel} that always attaches itself to the document body (i.e.
* {@link PRootPanel#get()}).
* <p>
* NOTE: This widget will <em>only</em> work in standards mode, which requires that the HTML page in which it
* is run have an explicit <!DOCTYPE> declaration.
* </p>
*/
public class PRootLayoutPanel extends PLayoutPanel {
private static final String ROOT = "PRootLayoutPanel";
private PRootLayoutPanel() {}
public static PRootLayoutPanel get() {
if (UIContext.getCurrentWindow() == null) return get(0);
return get(UIContext.getCurrentWindow().getID());
}
private static PRootLayoutPanel get(final long windowID) {
final String rootID = ROOT + "_" + windowID;
final UIContext session = UIContext.get();
PRootLayoutPanel root = session.getAttribute(rootID);
if (root == null) {
root = new PRootLayoutPanel();
session.setAttribute(rootID, root);
}
return root;
}
@Override
protected WidgetType getWidgetType() {
return WidgetType.ROOT_LAYOUT_PANEL;
}
}