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/*
* Copyright 2000-2014 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.
*/
/*
* Created by IntelliJ IDEA.
* User: mike
* Date: Jul 26, 2002
* Time: 2:16:32 PM
* To change template for new class use
* Code Style | Class Templates options (Tools | IDE Options).
*/
package com.intellij.codeInsight.daemon.impl.quickfix;
import com.intellij.codeInsight.FileModificationService;
import com.intellij.codeInsight.daemon.QuickFixBundle;
import com.intellij.codeInspection.LocalQuickFixAndIntentionActionOnPsiElement;
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.codeStyle.JavaCodeStyleManager;
import com.intellij.psi.util.PsiUtil;
import com.intellij.psi.util.TypeConversionUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import static com.intellij.util.ObjectUtils.assertNotNull;
public class AddTypeCastFix extends LocalQuickFixAndIntentionActionOnPsiElement {
private final PsiType myType;
public AddTypeCastFix(@NotNull PsiType type, @NotNull PsiExpression expression) {
super(expression);
myType = type;
}
@Override
@NotNull
public String getText() {
return QuickFixBundle.message("add.typecast.text", myType.getCanonicalText());
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("add.typecast.family");
}
@Override
public boolean isAvailable(@NotNull Project project,
@NotNull PsiFile file,
@NotNull PsiElement startElement,
@NotNull PsiElement endElement) {
return myType.isValid() && startElement.isValid() && startElement.getManager().isInProject(startElement);
}
@Override
public void invoke(@NotNull Project project,
@NotNull PsiFile file,
@Nullable("is null when called from inspection") Editor editor,
@NotNull PsiElement startElement,
@NotNull PsiElement endElement) {
if (!FileModificationService.getInstance().prepareFileForWrite(file)) return;
addTypeCast(project, (PsiExpression)startElement, myType);
}
private static void addTypeCast(Project project, PsiExpression originalExpression, PsiType type) {
PsiExpression typeCast = createCastExpression(originalExpression, project, type);
originalExpression.replace(typeCast);
}
static PsiExpression createCastExpression(PsiExpression original, Project project, PsiType type) {
// remove nested casts
PsiElement expression = PsiUtil.deparenthesizeExpression(original);
if (expression == null) return null;
if (type.equals(PsiType.NULL)) return null;
if (type instanceof PsiEllipsisType) type = ((PsiEllipsisType)type).toArrayType();
String text = "(" + type.getCanonicalText(false) + ")value";
PsiElementFactory factory = JavaPsiFacade.getInstance(original.getProject()).getElementFactory();
PsiTypeCastExpression typeCast = (PsiTypeCastExpression)factory.createExpressionFromText(text, original);
typeCast = (PsiTypeCastExpression)JavaCodeStyleManager.getInstance(project).shortenClassReferences(typeCast);
typeCast = (PsiTypeCastExpression)CodeStyleManager.getInstance(project).reformat(typeCast);
if (expression instanceof PsiConditionalExpression) {
// we'd better cast one branch of ternary expression if we can
PsiConditionalExpression conditional = (PsiConditionalExpression)expression.copy();
PsiExpression thenE = conditional.getThenExpression();
PsiExpression elseE = conditional.getElseExpression();
PsiType thenType = thenE == null ? null : thenE.getType();
PsiType elseType = elseE == null ? null : elseE.getType();
if (elseType != null && thenType != null) {
boolean replaceThen = !TypeConversionUtil.isAssignable(type, thenType);
boolean replaceElse = !TypeConversionUtil.isAssignable(type, elseType);
if (replaceThen != replaceElse) {
if (replaceThen) {
assertNotNull(typeCast.getOperand()).replace(thenE);
thenE.replace(typeCast);
}
else {
assertNotNull(typeCast.getOperand()).replace(elseE);
elseE.replace(typeCast);
}
return conditional;
}
}
}
assertNotNull(typeCast.getOperand()).replace(expression);
return typeCast;
}
@Override
public boolean startInWriteAction() {
return true;
}
}
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