001 /*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.jet.lang.psi;
018
019 import com.intellij.lang.ASTNode;
020 import com.intellij.navigation.ItemPresentation;
021 import com.intellij.navigation.ItemPresentationProviders;
022 import com.intellij.psi.PsiElement;
023 import com.intellij.psi.tree.IElementType;
024 import com.intellij.psi.util.PsiTreeUtil;
025 import org.jetbrains.annotations.NotNull;
026 import org.jetbrains.annotations.Nullable;
027 import org.jetbrains.jet.JetNodeTypes;
028 import org.jetbrains.jet.lang.psi.stubs.PsiJetFunctionStub;
029 import org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes;
030 import org.jetbrains.jet.lexer.JetTokens;
031
032 import java.util.Collections;
033 import java.util.List;
034
035 public class JetNamedFunction extends JetTypeParameterListOwnerStub<PsiJetFunctionStub> implements JetFunction, JetWithExpressionInitializer {
036 public JetNamedFunction(@NotNull ASTNode node) {
037 super(node);
038 }
039
040 public JetNamedFunction(@NotNull PsiJetFunctionStub stub) {
041 super(stub, JetStubElementTypes.FUNCTION);
042 }
043
044 @Override
045 public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
046 return visitor.visitNamedFunction(this, data);
047 }
048
049 public boolean hasTypeParameterListBeforeFunctionName() {
050 JetTypeParameterList typeParameterList = getTypeParameterList();
051 if (typeParameterList == null) {
052 return false;
053 }
054 PsiElement nameIdentifier = getNameIdentifier();
055 if (nameIdentifier == null) {
056 return false;
057 }
058 return nameIdentifier.getTextOffset() > typeParameterList.getTextOffset();
059 }
060
061 @Override
062 public boolean hasBlockBody() {
063 return getEqualsToken() == null;
064 }
065
066 @Nullable
067 public PsiElement getEqualsToken() {
068 return findChildByType(JetTokens.EQ);
069 }
070
071 @Override
072 @Nullable
073 public JetExpression getInitializer() {
074 return PsiTreeUtil.getNextSiblingOfType(getEqualsToken(), JetExpression.class);
075 }
076
077 @Override
078 public ItemPresentation getPresentation() {
079 return ItemPresentationProviders.getItemPresentation(this);
080 }
081
082 @Override
083 @Nullable
084 public JetParameterList getValueParameterList() {
085 return (JetParameterList) findChildByType(JetNodeTypes.VALUE_PARAMETER_LIST);
086 }
087
088 @Override
089 @NotNull
090 public List<JetParameter> getValueParameters() {
091 JetParameterList list = getValueParameterList();
092 return list != null ? list.getParameters() : Collections.<JetParameter>emptyList();
093 }
094
095 @Override
096 @Nullable
097 public JetExpression getBodyExpression() {
098 return findChildByClass(JetExpression.class);
099 }
100
101 @Override
102 public boolean hasDeclaredReturnType() {
103 return getReturnTypeRef() != null;
104 }
105
106 @Override
107 @Nullable
108 public JetTypeReference getReceiverTypeRef() {
109 PsiElement child = getFirstChild();
110 while (child != null) {
111 IElementType tt = child.getNode().getElementType();
112 if (tt == JetTokens.LPAR || tt == JetTokens.COLON) break;
113 if (child instanceof JetTypeReference) {
114 return (JetTypeReference) child;
115 }
116 child = child.getNextSibling();
117 }
118
119 return null;
120 }
121
122 @Override
123 @Nullable
124 public JetTypeReference getReturnTypeRef() {
125 boolean colonPassed = false;
126 PsiElement child = getFirstChild();
127 while (child != null) {
128 IElementType tt = child.getNode().getElementType();
129 if (tt == JetTokens.COLON) {
130 colonPassed = true;
131 }
132 if (colonPassed && child instanceof JetTypeReference) {
133 return (JetTypeReference) child;
134 }
135 child = child.getNextSibling();
136 }
137
138 return null;
139 }
140
141 @NotNull
142 @Override
143 public JetElement asElement() {
144 return this;
145 }
146
147 @Override
148 public boolean isLocal() {
149 PsiElement parent = getParent();
150 return !(parent instanceof JetFile || parent instanceof JetClassBody);
151 }
152 }