| /* |
| * Copyright 2007 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.ig.numeric; |
| |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.InspectionGadgetsBundle; |
| import com.siyeh.ig.BaseInspection; |
| import com.siyeh.ig.BaseInspectionVisitor; |
| import com.siyeh.ig.InspectionGadgetsFix; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class UnnecessaryUnaryMinusInspection extends BaseInspection { |
| |
| @Override |
| @NotNull |
| public String getDisplayName() { |
| return InspectionGadgetsBundle.message( |
| "unnecessary.unary.minus.display.name"); |
| } |
| |
| @Override |
| @NotNull |
| protected String buildErrorString(Object... infos) { |
| return InspectionGadgetsBundle.message( |
| "unnecessary.unary.minus.problem.descriptor"); |
| } |
| |
| @Override |
| @Nullable |
| protected InspectionGadgetsFix buildFix(Object... infos) { |
| return new UnnecessaryUnaryMinusFix(); |
| } |
| |
| private static class UnnecessaryUnaryMinusFix extends InspectionGadgetsFix { |
| |
| @Override |
| @NotNull |
| public String getName() { |
| return InspectionGadgetsBundle.message( |
| "unnecessary.unary.minus.quickfix"); |
| } |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return getName(); |
| } |
| |
| @Override |
| protected void doFix(Project project, ProblemDescriptor descriptor) |
| throws IncorrectOperationException { |
| final PsiElement element = descriptor.getPsiElement(); |
| final PsiPrefixExpression prefixExpression = |
| (PsiPrefixExpression)element.getParent(); |
| final PsiExpression parentExpression = |
| (PsiExpression)prefixExpression.getParent(); |
| @NonNls final StringBuilder newExpression = new StringBuilder(); |
| if (parentExpression instanceof PsiAssignmentExpression) { |
| final PsiAssignmentExpression assignmentExpression = |
| (PsiAssignmentExpression)parentExpression; |
| final PsiExpression lhs = assignmentExpression.getLExpression(); |
| newExpression.append(lhs.getText()); |
| final IElementType tokenType = |
| assignmentExpression.getOperationTokenType(); |
| if (tokenType.equals(JavaTokenType.PLUSEQ)) { |
| newExpression.append("-="); |
| } |
| else { |
| newExpression.append("+="); |
| } |
| } |
| else if (parentExpression instanceof PsiBinaryExpression) { |
| final PsiBinaryExpression binaryExpression = |
| (PsiBinaryExpression)parentExpression; |
| final PsiExpression lhs = binaryExpression.getLOperand(); |
| newExpression.append(lhs.getText()); |
| final IElementType tokenType = |
| binaryExpression.getOperationTokenType(); |
| if (tokenType.equals(JavaTokenType.PLUS)) { |
| newExpression.append('-'); |
| } |
| else { |
| newExpression.append('+'); |
| } |
| } |
| final PsiExpression operand = prefixExpression.getOperand(); |
| if (operand == null) { |
| return; |
| } |
| newExpression.append(operand.getText()); |
| PsiReplacementUtil.replaceExpression(parentExpression, newExpression.toString()); |
| } |
| } |
| |
| @Override |
| public BaseInspectionVisitor buildVisitor() { |
| return new UnnecessaryUnaryMinusVisitor(); |
| } |
| |
| private static class UnnecessaryUnaryMinusVisitor |
| extends BaseInspectionVisitor { |
| |
| @Override |
| public void visitPrefixExpression(PsiPrefixExpression expression) { |
| super.visitPrefixExpression(expression); |
| final IElementType operationTokenType = |
| expression.getOperationTokenType(); |
| if (!JavaTokenType.MINUS.equals(operationTokenType)) { |
| return; |
| } |
| final PsiElement parent = expression.getParent(); |
| if (parent instanceof PsiBinaryExpression) { |
| final PsiBinaryExpression binaryExpression = |
| (PsiBinaryExpression)parent; |
| final IElementType binaryExpressionTokenType = |
| binaryExpression.getOperationTokenType(); |
| if (!JavaTokenType.PLUS.equals(binaryExpressionTokenType)) { |
| return; |
| } |
| final PsiExpression rhs = binaryExpression.getROperand(); |
| if (!expression.equals(rhs)) { |
| return; |
| } |
| registerError(expression.getOperationSign()); |
| } |
| else if (parent instanceof PsiAssignmentExpression) { |
| final PsiAssignmentExpression assignmentExpression = |
| (PsiAssignmentExpression)parent; |
| final IElementType assignmentTokenType = |
| assignmentExpression.getOperationTokenType(); |
| if (!JavaTokenType.PLUSEQ.equals(assignmentTokenType)) { |
| return; |
| } |
| registerError(expression.getOperationSign()); |
| } |
| } |
| } |
| } |