| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * 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.intellij.psi.filters.element; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.filters.ElementFilter; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * User: ik |
| * Date: 06.01.2004 |
| * Time: 17:59:58 |
| * To change this template use Options | File Templates. |
| */ |
| public class ExcludeSillyAssignment implements ElementFilter { |
| |
| @Nullable |
| public static PsiReferenceExpression getAssignedReference(PsiElement position) { |
| PsiElement each = position; |
| while (each != null && !(each instanceof PsiFile)) { |
| if (each instanceof PsiExpressionList || each instanceof PsiPrefixExpression || each instanceof PsiPolyadicExpression) { |
| return null; |
| } |
| |
| if (each instanceof PsiAssignmentExpression) { |
| final PsiExpression left = ((PsiAssignmentExpression)each).getLExpression(); |
| if (left instanceof PsiReferenceExpression) { |
| final PsiReferenceExpression referenceExpression = (PsiReferenceExpression)left; |
| final PsiElement qualifier = referenceExpression.getQualifier(); |
| if (qualifier != null) { |
| if (!(qualifier instanceof PsiThisExpression) || ((PsiThisExpression)qualifier).getQualifier() != null) { |
| return null; |
| } |
| } |
| |
| return referenceExpression; |
| } |
| return null; |
| } |
| |
| each = each.getContext(); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public boolean isAcceptable(Object element, PsiElement context) { |
| if(!(element instanceof PsiElement)) return true; |
| |
| PsiReferenceExpression referenceExpression = getAssignedReference(context); |
| if (referenceExpression != null && referenceExpression.isReferenceTo((PsiElement)element)) { |
| return false; |
| } |
| return true; |
| } |
| |
| @Override |
| public boolean isClassAcceptable(Class hintClass) { |
| return true; |
| } |
| } |