| /* |
| * Copyright 2000-2013 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.jetbrains.python.inspections.quickfix; |
| |
| import com.intellij.codeInspection.LocalQuickFix; |
| import com.intellij.codeInspection.ProblemDescriptor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.tree.TokenSet; |
| import com.jetbrains.python.PyBundle; |
| import com.jetbrains.python.PyTokenTypes; |
| import com.jetbrains.python.psi.LanguageLevel; |
| import com.jetbrains.python.psi.PyBinaryExpression; |
| import com.jetbrains.python.psi.PyElementGenerator; |
| import com.jetbrains.python.psi.PyExpression; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * Created by IntelliJ IDEA. |
| * Author: Alexey.Ivanov |
| * Date: 17.03.2010 |
| * Time: 19:41:07 |
| */ |
| public class SimplifyBooleanCheckQuickFix implements LocalQuickFix { |
| private String myReplacementText; |
| |
| public SimplifyBooleanCheckQuickFix(PyBinaryExpression binaryExpression) { |
| myReplacementText = createReplacementText(binaryExpression); |
| } |
| |
| private static boolean isTrue(PyExpression expression) { |
| return "True".equals(expression.getText()); |
| } |
| |
| private static boolean isFalse(PyExpression expression) { |
| return "False".equals(expression.getText()); |
| } |
| |
| private static boolean isNull(PyExpression expression) { |
| return "0".equals(expression.getText()); |
| } |
| |
| private static boolean isEmpty(PyExpression expression) { |
| return "[]".equals(expression.getText()); |
| } |
| |
| @NotNull |
| public String getName() { |
| return PyBundle.message("QFIX.simplify.$0", myReplacementText); |
| } |
| |
| @NotNull |
| public String getFamilyName() { |
| return "Simplify boolean expression"; |
| } |
| |
| public void applyFix(@NotNull Project project, @NotNull ProblemDescriptor descriptor) { |
| final PsiElement element = descriptor.getPsiElement(); |
| if (!element.isValid() || !(element instanceof PyBinaryExpression)) { |
| return; |
| } |
| PyElementGenerator elementGenerator = PyElementGenerator.getInstance(project); |
| element.replace(elementGenerator.createExpressionFromText(LanguageLevel.forElement(element), myReplacementText)); |
| } |
| |
| private static String createReplacementText(PyBinaryExpression expression) { |
| PyExpression resultExpression; |
| final PyExpression leftExpression = expression.getLeftExpression(); |
| final PyExpression rightExpression = expression.getRightExpression(); |
| boolean positiveCondition = !TokenSet.create(PyTokenTypes.NE, PyTokenTypes.NE_OLD).contains(expression.getOperator()); |
| positiveCondition ^= isFalse(leftExpression) || isFalse(rightExpression) || isNull(rightExpression) || isNull(leftExpression) |
| || isEmpty(rightExpression) || isEmpty(leftExpression); |
| if (isTrue(leftExpression) || isFalse(leftExpression) || isNull(leftExpression) || isEmpty(leftExpression)) { |
| resultExpression = rightExpression; |
| } else { |
| resultExpression = leftExpression; |
| } |
| return ((positiveCondition) ? "" : "not ") + resultExpression.getText(); |
| } |
| } |