| /* |
| * Copyright 2000-2009 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.intellij.codeInsight.intention.impl; |
| |
| import com.intellij.codeInsight.CodeInsightBundle; |
| import com.intellij.codeInsight.FileModificationService; |
| import com.intellij.codeInsight.intention.PsiElementBaseIntentionAction; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.editor.ScrollType; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.CodeStyleManager; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.refactoring.util.RefactoringUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * @author mike |
| */ |
| public class SplitIfAction extends PsiElementBaseIntentionAction { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.intention.impl.SplitIfAction"); |
| |
| @Override |
| public boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element) { |
| if (!(element instanceof PsiJavaToken)) { |
| return false; |
| } |
| PsiJavaToken token = (PsiJavaToken)element; |
| if (!(token.getParent() instanceof PsiPolyadicExpression)) return false; |
| |
| PsiPolyadicExpression expression = (PsiPolyadicExpression)token.getParent(); |
| boolean isAndExpression = expression.getOperationTokenType() == JavaTokenType.ANDAND; |
| boolean isOrExpression = expression.getOperationTokenType() == JavaTokenType.OROR; |
| if (!isAndExpression && !isOrExpression) return false; |
| |
| while (expression.getParent() instanceof PsiPolyadicExpression) { |
| expression = (PsiPolyadicExpression)expression.getParent(); |
| if (isAndExpression && expression.getOperationTokenType() != JavaTokenType.ANDAND) return false; |
| if (isOrExpression && expression.getOperationTokenType() != JavaTokenType.OROR) return false; |
| } |
| |
| if (!(expression.getParent() instanceof PsiIfStatement)) return false; |
| PsiIfStatement ifStatement = (PsiIfStatement)expression.getParent(); |
| |
| if (!PsiTreeUtil.isAncestor(ifStatement.getCondition(), expression, false)) return false; |
| if (ifStatement.getThenBranch() == null) return false; |
| |
| setText(CodeInsightBundle.message("intention.split.if.text")); |
| |
| return true; |
| } |
| |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return CodeInsightBundle.message("intention.split.if.family"); |
| } |
| |
| @Override |
| public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException { |
| try { |
| if (!FileModificationService.getInstance().preparePsiElementForWrite(element)) return; |
| |
| PsiJavaToken token = (PsiJavaToken)element; |
| LOG.assertTrue(token.getTokenType() == JavaTokenType.ANDAND || token.getTokenType() == JavaTokenType.OROR); |
| |
| PsiPolyadicExpression expression = (PsiPolyadicExpression)token.getParent(); |
| PsiIfStatement ifStatement = PsiTreeUtil.getParentOfType(expression, PsiIfStatement.class); |
| |
| LOG.assertTrue(PsiTreeUtil.isAncestor(ifStatement.getCondition(), expression, false)); |
| |
| if (token.getTokenType() == JavaTokenType.ANDAND) { |
| doAndSplit(ifStatement, expression, token, editor); |
| } |
| else if (token.getTokenType() == JavaTokenType.OROR) { |
| doOrSplit(ifStatement, expression, token, editor); |
| } |
| } |
| catch (IncorrectOperationException e) { |
| LOG.error(e); |
| } |
| } |
| |
| private static void doAndSplit(PsiIfStatement ifStatement, PsiPolyadicExpression expression, PsiJavaToken token, Editor editor) throws IncorrectOperationException { |
| PsiExpression lOperand = getLOperands(expression, token); |
| PsiExpression rOperand = getROperands(expression, token); |
| |
| PsiManager psiManager = ifStatement.getManager(); |
| PsiIfStatement subIf = (PsiIfStatement)ifStatement.copy(); |
| |
| subIf.getCondition().replace(RefactoringUtil.unparenthesizeExpression(rOperand)); |
| ifStatement.getCondition().replace(RefactoringUtil.unparenthesizeExpression(lOperand)); |
| |
| if (ifStatement.getThenBranch() instanceof PsiBlockStatement) { |
| PsiBlockStatement blockStmt = |
| (PsiBlockStatement)JavaPsiFacade.getInstance(psiManager.getProject()).getElementFactory().createStatementFromText("{}", null); |
| blockStmt = (PsiBlockStatement)CodeStyleManager.getInstance(psiManager.getProject()).reformat(blockStmt); |
| blockStmt = (PsiBlockStatement)ifStatement.getThenBranch().replace(blockStmt); |
| blockStmt.getCodeBlock().add(subIf); |
| } |
| else { |
| ifStatement.getThenBranch().replace(subIf); |
| } |
| |
| int offset1 = ifStatement.getCondition().getTextOffset(); |
| |
| editor.getCaretModel().moveToOffset(offset1); |
| editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE); |
| editor.getSelectionModel().removeSelection(); |
| } |
| |
| private static PsiExpression getROperands(PsiPolyadicExpression expression, PsiJavaToken separator) throws IncorrectOperationException { |
| PsiElement next = PsiTreeUtil.skipSiblingsForward(separator, PsiWhiteSpace.class, PsiComment.class); |
| final int offsetInParent; |
| if (next == null) { |
| offsetInParent = separator.getStartOffsetInParent() + separator.getTextLength(); |
| } else { |
| offsetInParent = next.getStartOffsetInParent(); |
| } |
| |
| PsiElementFactory factory = JavaPsiFacade.getInstance(expression.getProject()).getElementFactory(); |
| String rOperands = expression.getText().substring(offsetInParent); |
| return factory.createExpressionFromText(rOperands, expression.getParent()); |
| } |
| |
| private static PsiExpression getLOperands(PsiPolyadicExpression expression, PsiJavaToken separator) throws IncorrectOperationException { |
| PsiElement prev = separator; |
| if (prev.getPrevSibling() instanceof PsiWhiteSpace) prev = prev.getPrevSibling(); |
| if (prev == null) { |
| throw new IncorrectOperationException("Unable to split '"+expression.getText()+"' left to '"+separator+"' (offset "+separator.getStartOffsetInParent()+")"); |
| } |
| |
| PsiElementFactory factory = JavaPsiFacade.getInstance(expression.getProject()).getElementFactory(); |
| String rOperands = expression.getText().substring(0, prev.getStartOffsetInParent()); |
| return factory.createExpressionFromText(rOperands, expression.getParent()); |
| } |
| |
| private static void doOrSplit(PsiIfStatement ifStatement, PsiPolyadicExpression expression, PsiJavaToken token, Editor editor) throws IncorrectOperationException { |
| PsiExpression lOperand = getLOperands(expression, token); |
| PsiExpression rOperand = getROperands(expression, token); |
| |
| PsiIfStatement secondIf = (PsiIfStatement)ifStatement.copy(); |
| |
| PsiStatement elseBranch = ifStatement.getElseBranch(); |
| if (elseBranch != null) { elseBranch = (PsiStatement)elseBranch.copy(); } |
| |
| ifStatement.getCondition().replace(RefactoringUtil.unparenthesizeExpression(lOperand)); |
| secondIf.getCondition().replace(RefactoringUtil.unparenthesizeExpression(rOperand)); |
| |
| ifStatement.setElseBranch(secondIf); |
| if (elseBranch != null) { secondIf.setElseBranch(elseBranch); } |
| |
| int offset1 = ifStatement.getCondition().getTextOffset(); |
| |
| editor.getCaretModel().moveToOffset(offset1); |
| editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE); |
| editor.getSelectionModel().removeSelection(); |
| } |
| } |