001 /*
002 * Sonar, open source software quality management tool.
003 * Copyright (C) 2008-2011 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 */
020 package org.sonar.gwt.ui;
021
022 import com.google.gwt.core.client.EntryPoint;
023 import com.google.gwt.core.client.GWT;
024 import com.google.gwt.core.client.JavaScriptObject;
025 import com.google.gwt.json.client.JSONObject;
026 import com.google.gwt.user.client.ui.RootPanel;
027 import com.google.gwt.user.client.ui.Widget;
028 import org.sonar.wsclient.gwt.GwtUtils;
029 import org.sonar.wsclient.services.Resource;
030 import org.sonar.wsclient.services.WSUtils;
031 import org.sonar.wsclient.unmarshallers.ResourceUnmarshaller;
032
033 public abstract class Page implements EntryPoint {
034
035 private static final ResourceUnmarshaller RESOURCE_UNMARSHALLER = new ResourceUnmarshaller();
036
037 private Widget currentWidget = null;
038 private Integer currentResourceId = null;
039
040 public final void onModuleLoad() {
041 export(GWT.getModuleName(), this);
042 load();
043 onResourceLoad();
044 }
045
046 private void load() {
047 Widget widget = doOnModuleLoad();
048 if (widget != null) {
049 getRootPanel().add(widget);
050 }
051 }
052
053 protected Widget doOnModuleLoad() {
054 return null;
055 }
056
057 public final void onResourceLoad() {
058 JavaScriptObject json = loadResource();
059 if (json != null) {
060 if (WSUtils.getINSTANCE() == null) {
061 WSUtils.setInstance(new GwtUtils()); // TODO dirty hack to initialize WSUtils
062 }
063 String jsonStr = (new JSONObject(json)).toString();
064 Resource resource = RESOURCE_UNMARSHALLER.toModel(jsonStr);
065
066 RootPanel container = getRootPanel();
067 container.clear();
068 if (resource.getId().equals(currentResourceId) && currentWidget != null) {
069 container.add(currentWidget);
070
071 } else {
072 currentWidget = doOnResourceLoad(resource);
073 currentResourceId = resource.getId();
074 if (currentWidget != null) {
075 container.add(currentWidget);
076 }
077 }
078 }
079 }
080
081 protected Widget doOnResourceLoad(Resource resource) {
082 return null;
083 }
084
085 protected final RootPanel getRootPanel() {
086 RootPanel result = RootPanel.get("gwtpage-" + GWT.getModuleName());
087 if (result == null) {
088 result = RootPanel.get("gwtpage");
089 }
090 return result;
091 }
092
093 private native JavaScriptObject loadResource()/*-{
094 return $wnd.config['resource'];
095 }-*/;
096
097 private native void export(String gwtId, Page page)/*-{
098 $wnd.modules[gwtId]=function() {page.@org.sonar.gwt.ui.Page::onResourceLoad()()};
099 }-*/;
100 }