| /* |
| * 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.template; |
| |
| import com.intellij.openapi.application.ApplicationManager; |
| import com.intellij.openapi.diagnostic.Logger; |
| import com.intellij.openapi.project.Project; |
| import com.intellij.psi.*; |
| import com.intellij.psi.codeStyle.JavaCodeStyleManager; |
| import com.intellij.psi.codeStyle.SuggestedNameInfo; |
| import com.intellij.psi.codeStyle.VariableKind; |
| import com.intellij.psi.text.BlockSupport; |
| import com.intellij.util.IncorrectOperationException; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * @author mike |
| */ |
| public class ExpressionUtil { |
| private static final Logger LOG = Logger.getInstance("#com.intellij.codeInsight.template.ExpressionUtil"); |
| |
| private ExpressionUtil() { |
| } |
| |
| @Nullable |
| public static String[] getNames(final ExpressionContext context) { |
| final Project project = context.getProject(); |
| final int offset = context.getStartOffset(); |
| |
| PsiDocumentManager.getInstance(project).commitAllDocuments(); |
| |
| String[] names = null; |
| PsiFile file = PsiDocumentManager.getInstance(project).getPsiFile(context.getEditor().getDocument()); |
| PsiElement element = file.findElementAt(offset); |
| if (element instanceof PsiIdentifier){ |
| names = getNamesForIdentifier(project, (PsiIdentifier)element); |
| } |
| else{ |
| final PsiFile fileCopy = (PsiFile)file.copy(); |
| ApplicationManager.getApplication().runWriteAction(new Runnable() { |
| @Override |
| public void run() { |
| BlockSupport blockSupport = BlockSupport.getInstance(project); |
| try{ |
| blockSupport.reparseRange(fileCopy, offset, offset, "xxx"); |
| } |
| catch(IncorrectOperationException e){ |
| LOG.error(e); |
| } |
| } |
| }); |
| PsiElement identifierCopy = fileCopy.findElementAt(offset); |
| if (identifierCopy instanceof PsiIdentifier) { |
| names = getNamesForIdentifier(project, (PsiIdentifier)identifierCopy); |
| } |
| } |
| return names; |
| } |
| |
| @Nullable |
| private static String[] getNamesForIdentifier(Project project, PsiIdentifier identifier){ |
| if (identifier.getParent() instanceof PsiVariable){ |
| PsiVariable var = (PsiVariable)identifier.getParent(); |
| if (identifier.equals(var.getNameIdentifier())){ |
| JavaCodeStyleManager codeStyleManager = JavaCodeStyleManager.getInstance(project); |
| VariableKind variableKind = codeStyleManager.getVariableKind(var); |
| PsiExpression initializer = var.getInitializer(); |
| if (var instanceof PsiParameter && ((PsiParameter)var).getDeclarationScope() instanceof PsiForeachStatement) { |
| //synthesize initializer |
| PsiForeachStatement foreachStatement = (PsiForeachStatement)((PsiParameter)var).getDeclarationScope(); |
| final PsiExpression iteratedValue = foreachStatement.getIteratedValue(); |
| if (iteratedValue != null) { |
| try { |
| final PsiArrayAccessExpression expr = (PsiArrayAccessExpression)JavaPsiFacade.getInstance(iteratedValue.getProject()) |
| .getElementFactory().createExpressionFromText("a[0]", var); |
| expr.getArrayExpression().replace(iteratedValue); |
| initializer = expr; //note: non physical with no parent |
| } |
| catch (IncorrectOperationException e) { |
| //do nothing |
| } |
| } |
| } |
| SuggestedNameInfo suggestedInfo = codeStyleManager.suggestVariableName(variableKind, null, initializer, var.getType()); |
| return suggestedInfo.names; |
| } |
| } |
| return null; |
| } |
| } |