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/*
* 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 com.intellij.codeInsight.intention.impl;
import com.intellij.codeInsight.CodeInsightBundle;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInsight.intention.PsiElementBaseIntentionAction;
import com.intellij.lang.java.JavaLanguage;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.project.Project;
import com.intellij.psi.*;
import com.intellij.psi.codeStyle.CodeStyleManager;
import com.intellij.psi.javadoc.PsiDocComment;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.refactoring.util.RefactoringUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NotNull;
/**
* @author max
*/
public class SplitDeclarationAction extends PsiElementBaseIntentionAction {
@Override
@NotNull
public String getFamilyName() {
return CodeInsightBundle.message("intention.split.declaration.family");
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, @NotNull PsiElement element) {
if (element instanceof PsiCompiledElement) return false;
if (!element.getManager().isInProject(element)) return false;
if (!element.getLanguage().isKindOf(JavaLanguage.INSTANCE)) return false;
final PsiElement context = PsiTreeUtil.getParentOfType(element, PsiDeclarationStatement.class, PsiClass.class);
if (context instanceof PsiDeclarationStatement) {
return isAvailableOnDeclarationStatement((PsiDeclarationStatement)context, element);
}
PsiField field = PsiTreeUtil.getParentOfType(element, PsiField.class);
if (field != null && PsiTreeUtil.getParentOfType(element, PsiDocComment.class) == null && isAvailableOnField(field)) {
setText(CodeInsightBundle.message("intention.split.declaration.text"));
return true;
}
return false;
}
private static boolean isAvailableOnField(PsiField field) {
final PsiTypeElement typeElement = field.getTypeElement();
if (typeElement == null) return false;
if (PsiTreeUtil.getParentOfType(typeElement, PsiField.class) != field) return true;
PsiElement nextField = field.getNextSibling();
while (nextField != null && !(nextField instanceof PsiField)) nextField = nextField.getNextSibling();
if (nextField != null && ((PsiField)nextField).getTypeElement() == typeElement) return true;
return false;
}
private boolean isAvailableOnDeclarationStatement(PsiDeclarationStatement decl, PsiElement element) {
PsiElement[] declaredElements = decl.getDeclaredElements();
if (declaredElements.length == 0) return false;
if (!(declaredElements[0] instanceof PsiLocalVariable)) return false;
if (declaredElements.length == 1) {
PsiLocalVariable var = (PsiLocalVariable)declaredElements[0];
if (var.getInitializer() == null) return false;
setText(CodeInsightBundle.message("intention.split.declaration.assignment.text"));
return true;
}
else if (declaredElements.length > 1) {
if (decl.getParent() instanceof PsiForStatement) return false;
setText(CodeInsightBundle.message("intention.split.declaration.text"));
return true;
}
return false;
}
@Override
public void invoke(@NotNull Project project, Editor editor, @NotNull PsiElement element) throws IncorrectOperationException {
if (!FileModificationService.getInstance().preparePsiElementForWrite(element)) return;
final PsiDeclarationStatement decl = PsiTreeUtil.getParentOfType(element, PsiDeclarationStatement.class);
final PsiManager psiManager = PsiManager.getInstance(project);
if (decl != null) {
invokeOnDeclarationStatement(decl, psiManager, project);
}
else {
PsiField field = PsiTreeUtil.getParentOfType(element, PsiField.class);
if (field != null) {
field.normalizeDeclaration();
}
}
}
private static void invokeOnDeclarationStatement(PsiDeclarationStatement decl, PsiManager psiManager,
Project project) throws IncorrectOperationException {
if (decl.getDeclaredElements().length == 1) {
PsiLocalVariable var = (PsiLocalVariable)decl.getDeclaredElements()[0];
var.normalizeDeclaration();
PsiExpressionStatement statement = (PsiExpressionStatement)JavaPsiFacade.getInstance(psiManager.getProject()).getElementFactory()
.createStatementFromText(var.getName() + "=xxx;", null);
statement = (PsiExpressionStatement)CodeStyleManager.getInstance(project).reformat(statement);
PsiAssignmentExpression assignment = (PsiAssignmentExpression)statement.getExpression();
PsiExpression initializer = var.getInitializer();
PsiExpression rExpression = RefactoringUtil.convertInitializerToNormalExpression(initializer, var.getType());
assignment.getRExpression().replace(rExpression);
initializer.delete();
PsiElement block = decl.getParent();
if (block instanceof PsiForStatement) {
final PsiDeclarationStatement varDeclStatement =
JavaPsiFacade.getInstance(psiManager.getProject()).getElementFactory().createVariableDeclarationStatement(var.getName(), var.getType(), null);
// For index can't be final, right?
for (PsiElement varDecl : varDeclStatement.getDeclaredElements()) {
if (varDecl instanceof PsiModifierListOwner) {
final PsiModifierList modList = ((PsiModifierListOwner)varDecl).getModifierList();
assert modList != null;
modList.setModifierProperty(PsiModifier.FINAL, false);
}
}
final PsiElement parent = block.getParent();
decl.replace(statement);
if (!(parent instanceof PsiCodeBlock)) {
final PsiBlockStatement blockStatement =
(PsiBlockStatement)JavaPsiFacade.getElementFactory(project).createStatementFromText("{}", null);
final PsiCodeBlock codeBlock = blockStatement.getCodeBlock();
codeBlock.add(varDeclStatement);
codeBlock.add(block);
block.replace(blockStatement);
}
else {
parent.addBefore(varDeclStatement, block);
}
}
else {
block.addAfter(statement, decl);
}
}
else {
((PsiLocalVariable)decl.getDeclaredElements()[0]).normalizeDeclaration();
}
}
}
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