| /* |
| * Copyright 2007-2013 Bas Leijdekkers |
| * |
| * 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.siyeh.ipp.opassign; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.util.TypeConversionUtil; |
| import com.siyeh.IntentionPowerPackBundle; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import com.siyeh.ig.psiutils.ParenthesesUtils; |
| import com.siyeh.ipp.base.MutablyNamedIntention; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| import org.jetbrains.annotations.NotNull; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| public class ReplaceOperatorAssignmentWithAssignmentIntention extends MutablyNamedIntention { |
| |
| private static final Map<IElementType, IElementType> tokenMap = new HashMap<IElementType, IElementType>(); |
| |
| static { |
| tokenMap.put(JavaTokenType.PLUSEQ, JavaTokenType.PLUS); |
| tokenMap.put(JavaTokenType.MINUSEQ, JavaTokenType.MINUS); |
| tokenMap.put(JavaTokenType.ASTERISKEQ, JavaTokenType.ASTERISK); |
| tokenMap.put(JavaTokenType.DIVEQ, JavaTokenType.DIV); |
| tokenMap.put(JavaTokenType.ANDEQ, JavaTokenType.AND); |
| tokenMap.put(JavaTokenType.OREQ, JavaTokenType.OR); |
| tokenMap.put(JavaTokenType.XOREQ, JavaTokenType.XOR); |
| tokenMap.put(JavaTokenType.PERCEQ, JavaTokenType.PERC); |
| tokenMap.put(JavaTokenType.LTLTEQ, JavaTokenType.LTLT); |
| tokenMap.put(JavaTokenType.GTGTEQ, JavaTokenType.GTGT); |
| tokenMap.put(JavaTokenType.GTGTGTEQ, JavaTokenType.GTGTGT); |
| } |
| |
| @Override |
| @NotNull |
| protected PsiElementPredicate getElementPredicate() { |
| return new OperatorAssignmentPredicate(); |
| } |
| |
| @Override |
| protected String getTextForElement(PsiElement element) { |
| final PsiAssignmentExpression assignmentExpression = (PsiAssignmentExpression)element; |
| final PsiJavaToken sign = assignmentExpression.getOperationSign(); |
| final String operator = sign.getText(); |
| return IntentionPowerPackBundle.message("replace.operator.assignment.with.assignment.intention.name", operator); |
| } |
| |
| @Override |
| protected void processIntention(@NotNull PsiElement element) { |
| final PsiAssignmentExpression assignmentExpression = (PsiAssignmentExpression)element; |
| final PsiJavaToken sign = assignmentExpression.getOperationSign(); |
| final PsiExpression lhs = assignmentExpression.getLExpression(); |
| final PsiExpression rhs = assignmentExpression.getRExpression(); |
| final String operator = sign.getText(); |
| final String newOperator = operator.substring(0, operator.length() - 1); |
| final String lhsText = lhs.getText(); |
| final String rhsText = (rhs == null) ? "" : rhs.getText(); |
| final boolean parentheses; |
| if (rhs instanceof PsiPolyadicExpression) { |
| final PsiPolyadicExpression binaryExpression = (PsiPolyadicExpression)rhs; |
| final int precedence1 = ParenthesesUtils.getPrecedenceForOperator(binaryExpression.getOperationTokenType()); |
| final IElementType signTokenType = sign.getTokenType(); |
| final IElementType newOperatorToken = tokenMap.get(signTokenType); |
| final int precedence2 = ParenthesesUtils.getPrecedenceForOperator(newOperatorToken); |
| parentheses = precedence1 >= precedence2 || !ParenthesesUtils.isCommutativeOperator(newOperatorToken); |
| } |
| else { |
| parentheses = false; |
| } |
| final String cast = getCastString(lhs, rhs); |
| final StringBuilder newExpression = new StringBuilder(lhsText); |
| newExpression.append('=').append(cast); |
| if (!cast.isEmpty()) { |
| newExpression.append('('); |
| } |
| newExpression.append(lhsText).append(newOperator); |
| if (parentheses) { |
| newExpression.append('(').append(rhsText).append(')'); |
| } |
| else { |
| newExpression.append(rhsText); |
| } |
| if (!cast.isEmpty()) { |
| newExpression.append(')'); |
| } |
| PsiReplacementUtil.replaceExpression(assignmentExpression, newExpression.toString()); |
| } |
| |
| private static String getCastString(PsiExpression lhs, PsiExpression rhs) { |
| final PsiType lType = lhs.getType(); |
| final PsiType rType = rhs.getType(); |
| if (lType == null || rType == null || |
| TypeConversionUtil.isAssignable(lType, rType) || !TypeConversionUtil.areTypesConvertible(lType, rType)) { |
| return ""; |
| } |
| return '(' + lType.getCanonicalText() + ')'; |
| } |
| } |