| /* |
| * 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.conditional; |
| |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.CodeStyleManager; |
| import com.intellij.psi.tree.IElementType; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.refactoring.util.RefactoringUtil; |
| import com.intellij.util.ArrayUtilRt; |
| 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.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| public class ReplaceConditionalWithIfIntention extends Intention { |
| |
| private static final Logger LOG = Logger.getInstance("#" + ReplaceConditionalWithIfIntention.class.getName()); |
| |
| @Override |
| @NotNull |
| public PsiElementPredicate getElementPredicate() { |
| return new ReplaceConditionalWithIfPredicate(); |
| } |
| |
| @Override |
| public void processIntention(@NotNull PsiElement element) throws IncorrectOperationException { |
| final PsiConditionalExpression expression = (PsiConditionalExpression)element; |
| replaceConditionalWithIf(expression); |
| } |
| |
| private static void replaceConditionalWithIf(PsiConditionalExpression expression) throws IncorrectOperationException { |
| final PsiStatement statement = PsiTreeUtil.getParentOfType(expression, PsiStatement.class); |
| if (statement == null) { |
| return; |
| } |
| final PsiVariable variable; |
| if (statement instanceof PsiDeclarationStatement) { |
| variable = PsiTreeUtil.getParentOfType(expression, PsiVariable.class); |
| } |
| else { |
| variable = null; |
| } |
| PsiExpression thenExpression = expression.getThenExpression(); |
| PsiExpression elseExpression = expression.getElseExpression(); |
| final PsiExpression condition = expression.getCondition(); |
| final PsiExpression strippedCondition = ParenthesesUtils.stripParentheses(condition); |
| final StringBuilder newStatement = new StringBuilder(); |
| newStatement.append("if("); |
| if (strippedCondition != null) { |
| newStatement.append(strippedCondition.getText()); |
| } |
| newStatement.append(')'); |
| if (variable != null) { |
| final String name = variable.getName(); |
| newStatement.append(name); |
| newStatement.append('='); |
| PsiExpression initializer = variable.getInitializer(); |
| if (initializer == null) { |
| return; |
| } |
| if (initializer instanceof PsiArrayInitializerExpression) { |
| final int conditionIdx = ArrayUtilRt.find(((PsiArrayInitializerExpression)initializer).getInitializers(), expression); |
| if (conditionIdx >= 0) { |
| initializer = (PsiExpression)initializer.replace(RefactoringUtil.convertInitializerToNormalExpression(initializer, variable.getType())); |
| final PsiArrayInitializerExpression arrayInitializer = ((PsiNewExpression)initializer).getArrayInitializer(); |
| LOG.assertTrue(arrayInitializer != null, initializer.getText()); |
| expression = (PsiConditionalExpression)arrayInitializer.getInitializers()[conditionIdx]; |
| thenExpression = expression.getThenExpression(); |
| elseExpression = expression.getElseExpression(); |
| } |
| } |
| appendElementTextWithoutParentheses(initializer, expression, thenExpression, newStatement); |
| newStatement.append("; else "); |
| newStatement.append(name); |
| newStatement.append('='); |
| appendElementTextWithoutParentheses(initializer, expression, elseExpression, newStatement); |
| newStatement.append(';'); |
| initializer.delete(); |
| final PsiManager manager = statement.getManager(); |
| final Project project = manager.getProject(); |
| final JavaPsiFacade facade = JavaPsiFacade.getInstance(project); |
| final PsiElementFactory factory = facade.getElementFactory(); |
| final PsiStatement ifStatement = factory.createStatementFromText(newStatement.toString(), statement); |
| final PsiElement parent = statement.getParent(); |
| final PsiElement addedElement = parent.addAfter(ifStatement, statement); |
| final CodeStyleManager styleManager = CodeStyleManager.getInstance(manager.getProject()); |
| styleManager.reformat(addedElement); |
| } |
| else { |
| final boolean addBraces = PsiTreeUtil.getParentOfType(expression, PsiIfStatement.class, true, PsiStatement.class) != null; |
| if (addBraces || thenExpression == null) { |
| newStatement.append('{'); |
| } |
| appendElementTextWithoutParentheses(statement, expression, thenExpression, newStatement); |
| if (addBraces) { |
| newStatement.append("} else {"); |
| } |
| else { |
| if (thenExpression == null) { |
| newStatement.append('}'); |
| } |
| newStatement.append(" else "); |
| if (elseExpression == null) { |
| newStatement.append('{'); |
| } |
| } |
| appendElementTextWithoutParentheses(statement, expression, elseExpression, newStatement); |
| if (addBraces || elseExpression == null) { |
| newStatement.append('}'); |
| } |
| PsiReplacementUtil.replaceStatement(statement, newStatement.toString()); |
| } |
| } |
| |
| private static void appendElementTextWithoutParentheses(@NotNull PsiElement element, @NotNull PsiElement elementToReplace, |
| @Nullable PsiExpression replacementExpression, @NotNull StringBuilder out) { |
| final PsiElement expressionParent = elementToReplace.getParent(); |
| if (expressionParent instanceof PsiParenthesizedExpression) { |
| final PsiElement grandParent = expressionParent.getParent(); |
| if (replacementExpression == null || !(grandParent instanceof PsiExpression) || |
| !ParenthesesUtils.areParenthesesNeeded(replacementExpression, (PsiExpression) grandParent, false)) { |
| appendElementText(element, expressionParent, replacementExpression, out); |
| return; |
| } |
| } |
| appendElementText(element, elementToReplace, replacementExpression, out); |
| } |
| |
| private static void appendElementText(@NotNull PsiElement element, @NotNull PsiElement elementToReplace, |
| @Nullable PsiExpression replacementExpression, @NotNull StringBuilder out) { |
| if (element.equals(elementToReplace)) { |
| final String replacementText = (replacementExpression == null) ? "" : replacementExpression.getText(); |
| out.append(replacementText); |
| return; |
| } |
| final PsiElement[] children = element.getChildren(); |
| if (children.length == 0) { |
| out.append(element.getText()); |
| if (element instanceof PsiComment) { |
| final PsiComment comment = (PsiComment)element; |
| final IElementType tokenType = comment.getTokenType(); |
| if (tokenType == JavaTokenType.END_OF_LINE_COMMENT) { |
| out.append('\n'); |
| } |
| } |
| return; |
| } |
| for (PsiElement child : children) { |
| appendElementText(child, elementToReplace, replacementExpression, out); |
| } |
| } |
| } |