content: /**
   * Copyright (C) 2010-2016 eBusiness Information, Excilys Group
   * Copyright (C) 2016-2020 the AndroidAnnotations project
   *
   * 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.androidannotations.internal.helper;
  
  import static com.helger.jcodemodel.JExpr._new;
  import static com.helger.jcodemodel.JExpr._null;
  import static com.helger.jcodemodel.JExpr._this;
  import static com.helger.jcodemodel.JMod.FINAL;
  import static com.helger.jcodemodel.JMod.PRIVATE;
  import static com.helger.jcodemodel.JMod.PUBLIC;
  import static org.androidannotations.helper.ModelConstants.generationSuffix;
  
  import org.androidannotations.AndroidAnnotationsEnvironment;
  import org.androidannotations.api.view.HasViews;
  import org.androidannotations.api.view.OnViewChangedNotifier;
  import org.androidannotations.holder.EComponentWithViewSupportHolder;
  import org.androidannotations.holder.EViewHolder;
  
  import com.helger.jcodemodel.AbstractJClass;
  import com.helger.jcodemodel.IJExpression;
  import com.helger.jcodemodel.JBlock;
  import com.helger.jcodemodel.JCodeModel;
  import com.helger.jcodemodel.JDirectClass;
  import com.helger.jcodemodel.JExpr;
  import com.helger.jcodemodel.JFieldVar;
  import com.helger.jcodemodel.JMethod;
  import com.helger.jcodemodel.JVar;
  
  public class ViewNotifierHelper {
  
  	private AndroidAnnotationsEnvironment environment;
  	private EComponentWithViewSupportHolder holder;
  	private JFieldVar notifier;
  
  	public ViewNotifierHelper(EComponentWithViewSupportHolder holder, AndroidAnnotationsEnvironment environment) {
  		this.holder = holder;
  		this.environment = environment;
  	}
  
  	public void invokeViewChanged(JBlock block) {
  		block.invoke(notifier, "notifyViewChanged").arg(_this());
  	}
  
  	public JVar replacePreviousNotifier(JBlock block) {
  		AbstractJClass notifierClass = holder.getEnvironment().getJClass(OnViewChangedNotifier.class);
  		if (notifier == null) {
  			notifier = holder.getGeneratedClass().field(PRIVATE | FINAL, notifierClass, "onViewChangedNotifier" + generationSuffix(), _new(notifierClass));
  			implementHasViewsInHolder();
  		}
  		return block.decl(notifierClass, "previousNotifier", notifierClass.staticInvoke("replaceNotifier").arg(notifier));
  	}
  
  	private void implementHasViewsInHolder() {
  		holder.getGeneratedClass()._implements(HasViews.class);
  		JCodeModel codeModel = environment.getCodeModel();
  
  		JDirectClass genericType = codeModel.directClass("T");
  		JMethod findViewById = holder.getGeneratedClass().method(PUBLIC, genericType, "internalFindViewById");
  		findViewById.generify("T", environment.getClasses().VIEW);
  		findViewById.annotate(Override.class);
  
  		JVar idParam = findViewById.param(codeModel.INT, "id");
  		IJExpression findViewByIdExpression = holder.getFindViewByIdExpression(idParam);
  		findViewById.body()._return(JExpr.cast(genericType, findViewByIdExpression));
  	}
  
  	public JVar replacePreviousNotifierWithNull(JBlock block) {
  		AbstractJClass notifierClass = holder.getEnvironment().getJClass(OnViewChangedNotifier.class);
  		return block.decl(notifierClass, "previousNotifier", notifierClass.staticInvoke("replaceNotifier").arg(_null()));
  	}
  
  	public void resetPreviousNotifier(JBlock block, JVar previousNotifier) {
  		AbstractJClass notifierClass = holder.getEnvironment().getJClass(OnViewChangedNotifier.class);
  		block.staticInvoke(notifierClass, "replaceNotifier").arg(previousNotifier);
  	}
  
  	public void wrapInitWithNotifier() {
  		JBlock initBlock = holder.getInit().body();
  		JVar previousNotifier = replacePreviousNotifier(initBlock);
  		((EViewHolder) holder).setInitBody(holder.getInit().body().blockSimple());
  		resetPreviousNotifier(initBlock.blockSimple(), previousNotifier);
  	}
  
  }
  