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/*
* Copyright 2000-2012 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.FileModificationService;
import com.intellij.codeInsight.daemon.QuickFixBundle;
import com.intellij.codeInsight.daemon.impl.HighlightInfo;
import com.intellij.codeInsight.intention.IntentionAction;
import com.intellij.openapi.editor.Editor;
import com.intellij.openapi.editor.ScrollType;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.TextRange;
import com.intellij.psi.*;
import com.intellij.psi.impl.PsiDiamondTypeUtil;
import com.intellij.psi.util.PsiExpressionTrimRenderer;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtil;
import com.intellij.psi.util.TypeConversionUtil;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
public class ChangeNewOperatorTypeFix implements IntentionAction {
private final PsiType myType;
private final PsiNewExpression myExpression;
private ChangeNewOperatorTypeFix(PsiType type, PsiNewExpression expression) {
myType = type;
myExpression = expression;
}
@Override
@NotNull
public String getText() {
return QuickFixBundle.message("change.new.operator.type.text", new PsiExpressionTrimRenderer.RenderFunction().fun(myExpression), myType.getPresentableText(), myType instanceof PsiArrayType ? "" : "()");
}
@Override
@NotNull
public String getFamilyName() {
return QuickFixBundle.message("change.new.operator.type.family");
}
@Override
public boolean isAvailable(@NotNull Project project, Editor editor, PsiFile file) {
return myType.isValid()
&& myExpression.isValid()
&& myExpression.getManager().isInProject(myExpression)
&& !TypeConversionUtil.isPrimitiveAndNotNull(myType)
&& (myType instanceof PsiArrayType || myExpression.getArgumentList() != null)
;
}
@Override
public void invoke(@NotNull Project project, Editor editor, PsiFile file) throws IncorrectOperationException {
if (!FileModificationService.getInstance().prepareFileForWrite(file)) return;
changeNewOperatorType(myExpression, myType, editor);
}
private static void changeNewOperatorType(PsiNewExpression originalExpression, PsiType toType, final Editor editor) throws IncorrectOperationException {
PsiNewExpression newExpression;
PsiElementFactory factory = JavaPsiFacade.getInstance(originalExpression.getProject()).getElementFactory();
int caretOffset;
TextRange selection;
if (toType instanceof PsiArrayType) {
final PsiExpression[] originalExpressionArrayDimensions = originalExpression.getArrayDimensions();
caretOffset = 0;
@NonNls String text = "new " + toType.getDeepComponentType().getCanonicalText() + "[";
if (originalExpressionArrayDimensions.length > 0) {
text += originalExpressionArrayDimensions[0].getText();
}
else {
text += "0";
caretOffset = -2;
}
text += "]";
for (int i = 1; i < toType.getArrayDimensions(); i++) {
text += "[";
String arrayDimension = "";
if (originalExpressionArrayDimensions.length > i) {
arrayDimension = originalExpressionArrayDimensions[i].getText();
text += arrayDimension;
}
text += "]";
if (caretOffset < 0) {
caretOffset -= arrayDimension.length() + 2;
}
}
newExpression = (PsiNewExpression)factory.createExpressionFromText(text, originalExpression);
if (caretOffset < 0) {
selection = new TextRange(caretOffset, caretOffset+1);
} else {
selection = null;
}
}
else {
final PsiAnonymousClass anonymousClass = originalExpression.getAnonymousClass();
newExpression = (PsiNewExpression)factory.createExpressionFromText("new " + toType.getCanonicalText() + "()" + (anonymousClass != null ? "{}" : ""), originalExpression);
PsiExpressionList argumentList = originalExpression.getArgumentList();
if (argumentList == null) return;
newExpression.getArgumentList().replace(argumentList);
if (anonymousClass == null) { //just to prevent useless inference
if (PsiDiamondTypeUtil.canCollapseToDiamond(newExpression, originalExpression, toType)) {
final PsiElement paramList = PsiDiamondTypeUtil.replaceExplicitWithDiamond(newExpression.getClassOrAnonymousClassReference().getParameterList());
newExpression = PsiTreeUtil.getParentOfType(paramList, PsiNewExpression.class);
}
}
if (anonymousClass != null) {
PsiAnonymousClass newAnonymousClass = newExpression.getAnonymousClass();
final PsiElement childInside = anonymousClass.getLBrace().getNextSibling();
if (childInside != null) {
newAnonymousClass.addRange(childInside, anonymousClass.getRBrace().getPrevSibling());
}
}
selection = null;
caretOffset = -1;
}
PsiElement element = originalExpression.replace(newExpression);
editor.getCaretModel().moveToOffset(element.getTextRange().getEndOffset() + caretOffset);
editor.getScrollingModel().scrollToCaret(ScrollType.RELATIVE);
if (selection != null) {
selection = selection.shiftRight(element.getTextRange().getEndOffset());
editor.getSelectionModel().setSelection(selection.getStartOffset(), selection.getEndOffset());
}
}
@Override
public boolean startInWriteAction() {
return true;
}
public static void register(final HighlightInfo highlightInfo, PsiExpression expression, final PsiType lType) {
expression = PsiUtil.deparenthesizeExpression(expression);
if (!(expression instanceof PsiNewExpression)) return;
final PsiType rType = expression.getType();
PsiType newType = lType;
if (rType instanceof PsiClassType && newType instanceof PsiClassType) {
final PsiClassType.ClassResolveResult rResolveResult = ((PsiClassType)rType).resolveGenerics();
PsiClass rClass = rResolveResult.getElement();
if (rClass instanceof PsiAnonymousClass) {
rClass = ((PsiAnonymousClass)rClass).getBaseClassType().resolve();
}
if (rClass != null) {
final PsiClassType.ClassResolveResult lResolveResult = ((PsiClassType)newType).resolveGenerics();
final PsiClass lClass = lResolveResult.getElement();
if (lClass != null) {
PsiSubstitutor substitutor = getInheritorSubstitutorForNewExpression(lClass, rClass, lResolveResult.getSubstitutor(), expression);
if (substitutor != null) {
newType = JavaPsiFacade.getInstance(lClass.getProject()).getElementFactory().createType(rClass, substitutor);
}
}
}
}
PsiNewExpression newExpression = (PsiNewExpression)expression;
QuickFixAction.registerQuickFixAction(highlightInfo, new ChangeNewOperatorTypeFix(newType, newExpression));
}
/* Guesswork
*/
@Nullable
private static PsiSubstitutor getInheritorSubstitutorForNewExpression(final PsiClass baseClass, final PsiClass inheritor,
final PsiSubstitutor baseSubstitutor, final PsiElement context) {
final Project project = baseClass.getProject();
JavaPsiFacade facade = JavaPsiFacade.getInstance(project);
final PsiResolveHelper resolveHelper = facade.getResolveHelper();
PsiSubstitutor superSubstitutor = TypeConversionUtil.getClassSubstitutor(baseClass, inheritor, PsiSubstitutor.EMPTY);
if (superSubstitutor == null) return null;
PsiSubstitutor inheritorSubstitutor = PsiSubstitutor.EMPTY;
for (PsiTypeParameter inheritorParameter : PsiUtil.typeParametersIterable(inheritor)) {
for (PsiTypeParameter baseParameter : PsiUtil.typeParametersIterable(baseClass)) {
final PsiType substituted = superSubstitutor.substitute(baseParameter);
PsiType arg = baseSubstitutor.substitute(baseParameter);
if (arg instanceof PsiWildcardType) arg = ((PsiWildcardType)arg).getBound();
PsiType substitution =
resolveHelper.getSubstitutionForTypeParameter(inheritorParameter, substituted, arg, true, PsiUtil.getLanguageLevel(context));
if (PsiType.NULL.equals(substitution)) continue;
if (substitution == null) {
return facade.getElementFactory().createRawSubstitutor(inheritor);
}
inheritorSubstitutor = inheritorSubstitutor.put(inheritorParameter, substitution);
break;
}
}
return inheritorSubstitutor;
}
}
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