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.core.handler;
  
  import java.util.List;
  
  import javax.lang.model.element.Element;
  import javax.lang.model.element.ExecutableElement;
  import javax.lang.model.element.VariableElement;
  import javax.lang.model.type.TypeKind;
  import javax.lang.model.type.TypeMirror;
  
  import org.androidannotations.AndroidAnnotationsEnvironment;
  import org.androidannotations.ElementValidation;
  import org.androidannotations.annotations.TextChange;
  import org.androidannotations.helper.CanonicalNameConstants;
  import org.androidannotations.helper.IdValidatorHelper;
  import org.androidannotations.holder.EComponentWithViewSupportHolder;
  import org.androidannotations.holder.TextWatcherHolder;
  import org.androidannotations.rclass.IRClass;
  
  import com.helger.jcodemodel.IJExpression;
  import com.helger.jcodemodel.JBlock;
  import com.helger.jcodemodel.JFieldRef;
  import com.helger.jcodemodel.JInvocation;
  import com.helger.jcodemodel.JVar;
  
  public class TextChangeHandler extends CoreBaseAnnotationHandler<EComponentWithViewSupportHolder> {
  
  	public TextChangeHandler(AndroidAnnotationsEnvironment environment) {
  		super(TextChange.class, environment);
  	}
  
  	@Override
  	public void validate(Element element, ElementValidation validation) {
  		validatorHelper.enclosingElementHasEnhancedViewSupportAnnotation(element, validation);
  
  		validatorHelper.resIdsExist(element, IRClass.Res.ID, IdValidatorHelper.FallbackStrategy.USE_ELEMENT_NAME, validation);
  
  		validatorHelper.isNotPrivate(element, validation);
  
  		validatorHelper.doesntThrowException(element, validation);
  
  		validatorHelper.returnTypeIsVoid((ExecutableElement) element, validation);
  
  		coreValidatorHelper.hasTextChangedMethodParameters((ExecutableElement) element, validation);
  	}
  
  	@Override
  	public void process(Element element, EComponentWithViewSupportHolder holder) throws Exception {
  		String methodName = element.getSimpleName().toString();
  
  		ExecutableElement executableElement = (ExecutableElement) element;
  		List<? extends VariableElement> parameters = executableElement.getParameters();
  
  		int startParameterPosition = -1;
  		int countParameterPosition = -1;
  		int beforeParameterPosition = -1;
  		int charSequenceParameterPosition = -1;
  		int viewParameterPosition = -1;
  		TypeMirror viewParameterType = null;
  
  		for (int i = 0; i < parameters.size(); i++) {
  			VariableElement parameter = parameters.get(i);
  			String parameterName = parameter.toString();
  			TypeMirror parameterType = parameter.asType();
  
  			if (CanonicalNameConstants.CHAR_SEQUENCE.equals(parameterType.toString())) {
  				charSequenceParameterPosition = i;
  			} else if (parameterType.getKind() == TypeKind.INT || CanonicalNameConstants.INTEGER.equals(parameterType.toString())) {
  				if ("start".equals(parameterName)) {
  					startParameterPosition = i;
  				} else if ("count".equals(parameterName)) {
  					countParameterPosition = i;
  				} else if ("before".equals(parameterName)) {
  					beforeParameterPosition = i;
  				}
  			} else {
  				TypeMirror textViewType = annotationHelper.typeElementFromQualifiedName(CanonicalNameConstants.TEXT_VIEW).asType();
  				if (annotationHelper.isSubtype(parameterType, textViewType)) {
  					viewParameterPosition = i;
  					viewParameterType = parameterType;
  				}
  			}
  		}
  
  		List<JFieldRef> idsRefs = annotationHelper.extractAnnotationFieldRefs(element, IRClass.Res.ID, true);
  
  		for (JFieldRef idRef : idsRefs) {
  			TextWatcherHolder textWatcherHolder = holder.getTextWatcherHolder(idRef, viewParameterType);
  			JBlock methodBody = textWatcherHolder.getOnTextChangedBody();
  
  			IJExpression activityRef = holder.getGeneratedClass().staticRef("this");
  			JInvocation textChangeCall = methodBody.invoke(activityRef, methodName);
  
  			for (int i = 0; i < parameters.size(); i++) {
  				if (i == startParameterPosition) {
  					JVar startParameter = textWatcherHolder.getOnTextChangedStartParam();
  					textChangeCall.arg(startParameter);
  				} else if (i == countParameterPosition) {
  					JVar countParameter = textWatcherHolder.getOnTextChangedCountParam();
  					textChangeCall.arg(countParameter);
  				} else if (i == beforeParameterPosition) {
  					JVar beforeParameter = textWatcherHolder.getOnTextChangedBeforeParam();
  					textChangeCall.arg(beforeParameter);
  				} else if (i == charSequenceParameterPosition) {
  					JVar charSequenceParam = textWatcherHolder.getOnTextChangedCharSequenceParam();
  					textChangeCall.arg(charSequenceParam);
  				} else if (i == viewParameterPosition) {
  					JVar viewParameter = textWatcherHolder.getTextViewVariable();
  					textChangeCall.arg(viewParameter);
  				}
  			}
  
  		}
  	}
  }
  