org.jetbrains.jet.lang.psi.JetNamedFunction Maven / Gradle / Ivy
/*
* Copyright 2010-2013 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 org.jetbrains.jet.lang.psi;
import com.intellij.lang.ASTNode;
import com.intellij.navigation.ItemPresentation;
import com.intellij.navigation.ItemPresentationProviders;
import com.intellij.psi.PsiElement;
import com.intellij.psi.tree.IElementType;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.jet.lang.psi.stubs.PsiJetFunctionStub;
import org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes;
import org.jetbrains.jet.lexer.JetTokens;
import java.util.Collections;
import java.util.List;
public class JetNamedFunction extends JetTypeParameterListOwnerStub implements JetFunction, JetWithExpressionInitializer {
public JetNamedFunction(@NotNull ASTNode node) {
super(node);
}
public JetNamedFunction(@NotNull PsiJetFunctionStub stub) {
super(stub, JetStubElementTypes.FUNCTION);
}
@Override
public R accept(@NotNull JetVisitor visitor, D data) {
return visitor.visitNamedFunction(this, data);
}
public boolean hasTypeParameterListBeforeFunctionName() {
PsiJetFunctionStub stub = getStub();
if (stub != null) {
return stub.hasTypeParameterListBeforeFunctionName();
}
return hasTypeParameterListBeforeFunctionNameByTree();
}
private boolean hasTypeParameterListBeforeFunctionNameByTree() {
JetTypeParameterList typeParameterList = getTypeParameterList();
if (typeParameterList == null) {
return false;
}
PsiElement nameIdentifier = getNameIdentifier();
if (nameIdentifier == null) {
return false;
}
return nameIdentifier.getTextOffset() > typeParameterList.getTextOffset();
}
@Override
public boolean hasBlockBody() {
PsiJetFunctionStub stub = getStub();
if (stub != null) {
return stub.hasBlockBody();
}
return getEqualsToken() == null;
}
@Nullable
public PsiElement getEqualsToken() {
return findChildByType(JetTokens.EQ);
}
@Override
@Nullable
public JetExpression getInitializer() {
return PsiTreeUtil.getNextSiblingOfType(getEqualsToken(), JetExpression.class);
}
@Override
public boolean hasInitializer() {
return getInitializer() != null;
}
@Override
public ItemPresentation getPresentation() {
return ItemPresentationProviders.getItemPresentation(this);
}
@Override
@Nullable
public JetParameterList getValueParameterList() {
return getStubOrPsiChild(JetStubElementTypes.VALUE_PARAMETER_LIST);
}
@Override
@NotNull
public List getValueParameters() {
JetParameterList list = getValueParameterList();
return list != null ? list.getParameters() : Collections.emptyList();
}
@Override
@Nullable
public JetExpression getBodyExpression() {
return findChildByClass(JetExpression.class);
}
@Override
public boolean hasBody() {
PsiJetFunctionStub stub = getStub();
if (stub != null) {
return stub.hasBody();
}
return getBodyExpression() != null;
}
@Override
public boolean hasDeclaredReturnType() {
return getReturnTypeRef() != null;
}
@Override
@Nullable
public JetTypeReference getReceiverTypeRef() {
PsiJetFunctionStub stub = getStub();
if (stub != null) {
if (!stub.isExtension()) {
return null;
}
List childTypeReferences = getStubOrPsiChildrenAsList(JetStubElementTypes.TYPE_REFERENCE);
if (!childTypeReferences.isEmpty()) {
return childTypeReferences.get(0);
}
else {
return null;
}
}
return getReceiverTypeRefByTree();
}
@Nullable
private JetTypeReference getReceiverTypeRefByTree() {
PsiElement child = getFirstChild();
while (child != null) {
IElementType tt = child.getNode().getElementType();
if (tt == JetTokens.LPAR || tt == JetTokens.COLON) break;
if (child instanceof JetTypeReference) {
return (JetTypeReference) child;
}
child = child.getNextSibling();
}
return null;
}
@Override
@Nullable
public JetTypeReference getReturnTypeRef() {
PsiJetFunctionStub stub = getStub();
if (stub != null) {
List typeReferences = getStubOrPsiChildrenAsList(JetStubElementTypes.TYPE_REFERENCE);
int returnTypeIndex = stub.isExtension() ? 1 : 0;
if (returnTypeIndex >= typeReferences.size()) {
return null;
}
return typeReferences.get(returnTypeIndex);
}
return getReturnTypeRefByPsi();
}
@Nullable
private JetTypeReference getReturnTypeRefByPsi() {
boolean colonPassed = false;
PsiElement child = getFirstChild();
while (child != null) {
IElementType tt = child.getNode().getElementType();
if (tt == JetTokens.COLON) {
colonPassed = true;
}
if (colonPassed && child instanceof JetTypeReference) {
return (JetTypeReference) child;
}
child = child.getNextSibling();
}
return null;
}
@NotNull
@Override
public JetElement asElement() {
return this;
}
@Override
public boolean isLocal() {
PsiElement parent = getParent();
return !(parent instanceof JetFile || parent instanceof JetClassBody);
}
}