| /* |
| * Copyright 2003-2013 Dave Griffith, 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.trivialif; |
| |
| import com.intellij.psi.*; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import com.siyeh.ig.PsiReplacementUtil; |
| import com.siyeh.ig.psiutils.ParenthesesUtils; |
| import com.siyeh.ipp.base.Intention; |
| import com.siyeh.ipp.base.PsiElementPredicate; |
| import org.jetbrains.annotations.NonNls; |
| import org.jetbrains.annotations.NotNull; |
| |
| public class MergeIfOrIntention extends Intention { |
| |
| @NotNull |
| public PsiElementPredicate getElementPredicate() { |
| return new MergeIfOrPredicate(); |
| } |
| |
| public void processIntention(PsiElement element) |
| throws IncorrectOperationException { |
| final PsiJavaToken token = (PsiJavaToken)element; |
| if (MergeIfOrPredicate.isMergableExplicitIf(token)) { |
| replaceMergeableExplicitIf(token); |
| } |
| else { |
| replaceMergeableImplicitIf(token); |
| } |
| } |
| |
| private static void replaceMergeableExplicitIf(PsiJavaToken token) |
| throws IncorrectOperationException { |
| final PsiIfStatement parentStatement = |
| (PsiIfStatement)token.getParent(); |
| assert parentStatement != null; |
| final PsiIfStatement childStatement = |
| (PsiIfStatement)parentStatement.getElseBranch(); |
| if (childStatement == null) { |
| return; |
| } |
| final PsiExpression childCondition = childStatement.getCondition(); |
| if (childCondition == null) { |
| return; |
| } |
| final String childConditionText; |
| if (ParenthesesUtils.getPrecedence(childCondition) |
| > ParenthesesUtils.OR_PRECEDENCE) { |
| childConditionText = '(' + childCondition.getText() + ')'; |
| } |
| else { |
| childConditionText = childCondition.getText(); |
| } |
| final PsiExpression condition = parentStatement.getCondition(); |
| if (condition == null) { |
| return; |
| } |
| final String parentConditionText; |
| if (ParenthesesUtils.getPrecedence(condition) |
| > ParenthesesUtils.OR_PRECEDENCE) { |
| parentConditionText = '(' + condition.getText() + ')'; |
| } |
| else { |
| parentConditionText = condition.getText(); |
| } |
| final PsiStatement parentThenBranch = parentStatement.getThenBranch(); |
| if (parentThenBranch == null) { |
| return; |
| } |
| final String parentThenBranchText = parentThenBranch.getText(); |
| @NonNls final StringBuilder statement = new StringBuilder(); |
| statement.append("if("); |
| statement.append(parentConditionText); |
| statement.append("||"); |
| statement.append(childConditionText); |
| statement.append(')'); |
| statement.append(parentThenBranchText); |
| final PsiStatement childElseBranch = childStatement.getElseBranch(); |
| if (childElseBranch != null) { |
| final String childElseBranchText = childElseBranch.getText(); |
| statement.append("else "); |
| statement.append(childElseBranchText); |
| } |
| final String newStatement = statement.toString(); |
| PsiReplacementUtil.replaceStatement(parentStatement, newStatement); |
| } |
| |
| private static void replaceMergeableImplicitIf(PsiJavaToken token) |
| throws IncorrectOperationException { |
| final PsiIfStatement parentStatement = |
| (PsiIfStatement)token.getParent(); |
| final PsiIfStatement childStatement = |
| (PsiIfStatement)PsiTreeUtil.skipSiblingsForward(parentStatement, |
| PsiWhiteSpace.class); |
| assert childStatement != null; |
| final PsiExpression childCondition = childStatement.getCondition(); |
| if (childCondition == null) { |
| return; |
| } |
| final String childConditionText; |
| if (ParenthesesUtils.getPrecedence(childCondition) |
| > ParenthesesUtils.OR_PRECEDENCE) { |
| childConditionText = '(' + childCondition.getText() + ')'; |
| } |
| else { |
| childConditionText = childCondition.getText(); |
| } |
| assert parentStatement != null; |
| final PsiExpression condition = parentStatement.getCondition(); |
| if (condition == null) { |
| return; |
| } |
| final String parentConditionText; |
| if (ParenthesesUtils.getPrecedence(condition) |
| > ParenthesesUtils.OR_PRECEDENCE) { |
| parentConditionText = '(' + condition.getText() + ')'; |
| } |
| else { |
| parentConditionText = condition.getText(); |
| } |
| final PsiStatement parentThenBranch = parentStatement.getThenBranch(); |
| if (parentThenBranch == null) { |
| return; |
| } |
| final StringBuilder newStatement = new StringBuilder(); |
| newStatement.append("if("); |
| newStatement.append(parentConditionText); |
| newStatement.append("||"); |
| newStatement.append(childConditionText); |
| newStatement.append(')'); |
| newStatement.append(parentThenBranch.getText()); |
| final PsiStatement childElseBranch = childStatement.getElseBranch(); |
| if (childElseBranch != null) { |
| newStatement.append("else "); |
| newStatement.append(childElseBranch.getText()); |
| } |
| PsiReplacementUtil.replaceStatement(parentStatement, newStatement.toString()); |
| childStatement.delete(); |
| } |
| } |