| /* |
| * 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.daemon.impl.quickfix; |
| |
| import com.intellij.codeInsight.CodeInsightUtil; |
| import com.intellij.codeInsight.daemon.QuickFixBundle; |
| import com.intellij.codeInsight.intention.IntentionAction; |
| import com.intellij.openapi.editor.Editor; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.openapi.util.Comparing; |
| import com.intellij.psi.*; |
| import com.intellij.psi.scope.processor.VariablesNotProcessor; |
| import com.intellij.psi.scope.util.PsiScopesUtil; |
| import com.intellij.psi.util.PsiUtil; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author cdr |
| * Date: Nov 20, 2002 |
| */ |
| public class ReuseVariableDeclarationFix implements IntentionAction { |
| private final PsiLocalVariable myVariable; |
| |
| public ReuseVariableDeclarationFix(@NotNull PsiLocalVariable variable) { |
| this.myVariable = variable; |
| } |
| |
| @Override |
| @NotNull |
| public String getFamilyName() { |
| return QuickFixBundle.message("reuse.variable.declaration.family"); |
| } |
| |
| @Override |
| @NotNull |
| public String getText() { |
| return QuickFixBundle.message("reuse.variable.declaration.text", myVariable.getName()); |
| } |
| |
| @Override |
| public boolean isAvailable(@NotNull final Project project, final Editor editor, final PsiFile file) { |
| if (!myVariable.isValid()) { |
| return false; |
| } |
| final PsiVariable previousVariable = findPreviousVariable(); |
| return previousVariable != null && |
| Comparing.equal(previousVariable.getType(), myVariable.getType()) && |
| myVariable.getManager().isInProject(myVariable); |
| } |
| |
| @Override |
| public void invoke(@NotNull final Project project, final Editor editor, final PsiFile file) throws IncorrectOperationException { |
| final PsiVariable refVariable = findPreviousVariable(); |
| if (refVariable == null) return; |
| |
| if (!CodeInsightUtil.preparePsiElementsForWrite(myVariable, refVariable)) return; |
| |
| final PsiExpression initializer = myVariable.getInitializer(); |
| if (initializer == null) { |
| myVariable.delete(); |
| return; |
| } |
| |
| PsiUtil.setModifierProperty(refVariable, PsiModifier.FINAL, false); |
| final PsiElementFactory factory = JavaPsiFacade.getInstance(myVariable.getProject()).getElementFactory(); |
| final PsiElement statement = factory.createStatementFromText(myVariable.getName() + " = " + initializer.getText() + ";", null); |
| myVariable.getParent().replace(statement); |
| } |
| |
| @Nullable |
| private PsiVariable findPreviousVariable() { |
| PsiElement scope = myVariable.getParent(); |
| while (scope != null) { |
| if (scope instanceof PsiFile || scope instanceof PsiMethod || scope instanceof PsiClassInitializer) break; |
| scope = scope.getParent(); |
| } |
| if (scope == null) return null; |
| |
| PsiIdentifier nameIdentifier = myVariable.getNameIdentifier(); |
| if (nameIdentifier == null) { |
| return null; |
| } |
| |
| final VariablesNotProcessor processor = new VariablesNotProcessor(myVariable, false); |
| PsiScopesUtil.treeWalkUp(processor, nameIdentifier, scope); |
| return processor.size() > 0 ? processor.getResult(0) : null; |
| } |
| |
| @Override |
| public boolean startInWriteAction() { |
| return true; |
| } |
| } |