001/*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2012 SonarSource
004 * mailto:contact AT sonarsource DOT com
005 *
006 * Sonar is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * Sonar is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public
017 * License along with Sonar; if not, write to the Free Software
018 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019 */
020package org.sonar.gwt.ui;
021
022import com.google.gwt.core.client.EntryPoint;
023import com.google.gwt.core.client.GWT;
024import com.google.gwt.core.client.JavaScriptObject;
025import com.google.gwt.json.client.JSONObject;
026import com.google.gwt.user.client.ui.RootPanel;
027import com.google.gwt.user.client.ui.Widget;
028import org.sonar.wsclient.gwt.GwtUtils;
029import org.sonar.wsclient.services.Resource;
030import org.sonar.wsclient.services.WSUtils;
031import org.sonar.wsclient.unmarshallers.ResourceUnmarshaller;
032
033public abstract class Page implements EntryPoint {
034
035  private static final ResourceUnmarshaller RESOURCE_UNMARSHALLER = new ResourceUnmarshaller();
036
037  public final void onModuleLoad() {
038    export(GWT.getModuleName(), this);
039    load();
040    onResourceLoad();
041  }
042
043  private void load() {
044    Widget widget = doOnModuleLoad();
045    if (widget != null) {
046      getRootPanel().add(widget);
047    }
048  }
049
050  protected Widget doOnModuleLoad() {
051    return null;
052  }
053
054  public final void onResourceLoad() {
055    JavaScriptObject json = loadResource();
056    if (json != null) {
057      if (WSUtils.getINSTANCE() == null) {
058        WSUtils.setInstance(new GwtUtils()); // TODO dirty hack to initialize WSUtils
059      }
060      String jsonStr = (new JSONObject(json)).toString();
061      Resource resource = RESOURCE_UNMARSHALLER.toModel(jsonStr);
062
063      RootPanel container = getRootPanel();
064      container.clear();
065
066      Widget currentWidget = doOnResourceLoad(resource);
067      if (currentWidget != null) {
068        container.add(currentWidget);
069      }
070    }
071  }
072
073  protected Widget doOnResourceLoad(Resource resource) {
074    return null;
075  }
076
077  protected final RootPanel getRootPanel() {
078    RootPanel result = RootPanel.get("gwtpage-" + GWT.getModuleName());
079    if (result == null) {
080      result = RootPanel.get("gwtpage");
081    }
082    return result;
083  }
084
085  private native JavaScriptObject loadResource()/*-{
086                                                return $wnd.config['resource'];
087                                                }-*/;
088
089  private native void export(String gwtId, Page page)/*-{
090                                                     $wnd.modules[gwtId]=function() {page.@org.sonar.gwt.ui.Page::onResourceLoad()()};
091                                                     }-*/;
092}