| /* |
| * 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 org.jetbrains.plugins.groovy.intentions.control; |
| |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.util.PsiTreeUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.plugins.groovy.codeInspection.utils.ControlFlowUtils; |
| import org.jetbrains.plugins.groovy.intentions.base.Intention; |
| import org.jetbrains.plugins.groovy.intentions.base.PsiElementPredicate; |
| import org.jetbrains.plugins.groovy.lang.lexer.GroovyTokenTypes; |
| import org.jetbrains.plugins.groovy.lang.psi.GrControlFlowOwner; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrBlockStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrIfStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.GrStatement; |
| import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrOpenBlock; |
| import org.jetbrains.plugins.groovy.lang.psi.api.util.GrStatementOwner; |
| import org.jetbrains.plugins.groovy.lang.psi.controlFlow.Instruction; |
| import org.jetbrains.plugins.groovy.lang.psi.controlFlow.impl.IfEndInstruction; |
| import org.jetbrains.plugins.groovy.lang.psi.util.PsiUtil; |
| import org.jetbrains.plugins.groovy.refactoring.GroovyRefactoringUtil; |
| |
| /** |
| * @author Max Medvedev |
| */ |
| public class GrRedundantElseIntention extends Intention { |
| public static final String HINT = "Remove redundant 'else' keyword"; |
| @Override |
| protected void processIntention(@NotNull PsiElement element, Project project, Editor editor) throws IncorrectOperationException { |
| final PsiElement parent = element.getParent(); |
| if (!(parent instanceof GrIfStatement)) return; |
| |
| final GrIfStatement ifStatement = GroovyRefactoringUtil.addBlockIntoParent((GrIfStatement)parent); |
| assert ifStatement.getParent() instanceof GrStatementOwner; |
| final PsiElement statementOwner = ifStatement.getParent(); |
| |
| final GrStatement branch = ifStatement.getElseBranch(); |
| if (branch == null) return; |
| |
| final PsiElement pos; |
| if (branch instanceof GrBlockStatement) { |
| final GrOpenBlock block = ((GrBlockStatement)branch).getBlock(); |
| |
| final PsiElement first = inferFirst(block.getLBrace()); |
| final PsiElement last = inferLast(block.getRBrace()); |
| pos = statementOwner.addRangeAfter(first, last, ifStatement); |
| } |
| else { |
| pos = statementOwner.addAfter(branch, ifStatement); |
| } |
| branch.delete(); |
| |
| editor.getCaretModel().moveToOffset(pos.getTextRange().getStartOffset()); |
| } |
| |
| private static PsiElement inferFirst(PsiElement lbrace) { |
| return PsiUtil.skipWhitespaces(lbrace.getNextSibling(), true); |
| } |
| |
| private static PsiElement inferLast(PsiElement rbrace) { |
| return PsiUtil.skipWhitespaces(rbrace.getPrevSibling(), false); |
| } |
| |
| @NotNull |
| @Override |
| protected PsiElementPredicate getElementPredicate() { |
| return new PsiElementPredicate() { |
| @Override |
| public boolean satisfiedBy(PsiElement element) { |
| if (!(element.getNode().getElementType() == GroovyTokenTypes.kELSE)) return false; |
| |
| final PsiElement parent = element.getParent(); |
| if (!(parent instanceof GrIfStatement)) return false; |
| |
| final GrIfStatement ifStatement = (GrIfStatement)parent; |
| |
| final GrStatement branch = ifStatement.getThenBranch(); |
| final GrControlFlowOwner flowOwner = ControlFlowUtils.findControlFlowOwner(ifStatement); |
| if (flowOwner == null) return false; |
| |
| final Instruction[] flow = flowOwner.getControlFlow(); |
| for (Instruction instruction : flow) { |
| if (instruction instanceof IfEndInstruction && instruction.getElement() == ifStatement) { |
| for (Instruction pred : instruction.allPredecessors()) { |
| final PsiElement predElement = pred.getElement(); |
| if (predElement != null && PsiTreeUtil.isAncestor(branch, predElement, false)) { |
| return false; |
| } |
| } |
| } |
| } |
| |
| return true; |
| } |
| }; |
| } |
| } |