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.stubs.IStubElementType;
024 import com.intellij.psi.tree.IElementType;
025 import com.intellij.psi.util.PsiTreeUtil;
026 import org.jetbrains.annotations.NotNull;
027 import org.jetbrains.annotations.Nullable;
028 import org.jetbrains.jet.JetNodeTypes;
029 import org.jetbrains.jet.lang.psi.stubs.PsiJetFunctionStub;
030 import org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes;
031 import org.jetbrains.jet.lang.resolve.name.FqName;
032 import org.jetbrains.jet.lang.resolve.name.Name;
033 import org.jetbrains.jet.lexer.JetTokens;
034
035 import java.util.Collections;
036 import java.util.List;
037
038 public class JetNamedFunction extends JetTypeParameterListOwnerStub<PsiJetFunctionStub> implements JetFunction, JetWithExpressionInitializer {
039 public JetNamedFunction(@NotNull ASTNode node) {
040 super(node);
041 }
042
043 public JetNamedFunction(@NotNull PsiJetFunctionStub stub) {
044 super(stub, JetStubElementTypes.FUNCTION);
045 }
046
047 @Override
048 public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
049 return visitor.visitNamedFunction(this, data);
050 }
051
052 public boolean hasTypeParameterListBeforeFunctionName() {
053 JetTypeParameterList typeParameterList = getTypeParameterList();
054 if (typeParameterList == null) {
055 return false;
056 }
057 PsiElement nameIdentifier = getNameIdentifier();
058 if (nameIdentifier == null) {
059 return false;
060 }
061 return nameIdentifier.getTextOffset() > typeParameterList.getTextOffset();
062 }
063
064 @Override
065 public boolean hasBlockBody() {
066 return getEqualsToken() == null;
067 }
068
069 @Nullable
070 public PsiElement getEqualsToken() {
071 return findChildByType(JetTokens.EQ);
072 }
073
074 @Override
075 @Nullable
076 public JetExpression getInitializer() {
077 return PsiTreeUtil.getNextSiblingOfType(getEqualsToken(), JetExpression.class);
078 }
079
080 /**
081 * Returns full qualified name for function "package_fqn.function_name"
082 * Not null for top level functions unless syntax errors are present.
083 * @return
084 */
085 @Nullable
086 public FqName getFqName() {
087 PsiJetFunctionStub stub = getStub();
088 if (stub != null) {
089 return stub.getTopFQName();
090 }
091
092 PsiElement parent = getParent();
093 if (parent instanceof JetFile) {
094 // fqname is different in scripts
095 if (((JetFile) parent).getPackageDirective() == null) {
096 return null;
097 }
098 JetFile jetFile = (JetFile) parent;
099 FqName fileFQN = JetPsiUtil.getFQName(jetFile);
100 Name nameAsName = getNameAsName();
101 if (nameAsName != null) {
102 return fileFQN.child(nameAsName);
103 }
104 }
105
106 return null;
107 }
108
109 @NotNull
110 @Override
111 public IStubElementType getElementType() {
112 return JetStubElementTypes.FUNCTION;
113 }
114
115 @Override
116 public ItemPresentation getPresentation() {
117 return ItemPresentationProviders.getItemPresentation(this);
118 }
119
120 @Override
121 @Nullable
122 public JetParameterList getValueParameterList() {
123 return (JetParameterList) findChildByType(JetNodeTypes.VALUE_PARAMETER_LIST);
124 }
125
126 @Override
127 @NotNull
128 public List<JetParameter> getValueParameters() {
129 JetParameterList list = getValueParameterList();
130 return list != null ? list.getParameters() : Collections.<JetParameter>emptyList();
131 }
132
133 @Override
134 @Nullable
135 public JetExpression getBodyExpression() {
136 return findChildByClass(JetExpression.class);
137 }
138
139 @Override
140 public boolean hasDeclaredReturnType() {
141 return getReturnTypeRef() != null;
142 }
143
144 @Override
145 @Nullable
146 public JetTypeReference getReceiverTypeRef() {
147 PsiElement child = getFirstChild();
148 while (child != null) {
149 IElementType tt = child.getNode().getElementType();
150 if (tt == JetTokens.LPAR || tt == JetTokens.COLON) break;
151 if (child instanceof JetTypeReference) {
152 return (JetTypeReference) child;
153 }
154 child = child.getNextSibling();
155 }
156
157 return null;
158 }
159
160 @Override
161 @Nullable
162 public JetTypeReference getReturnTypeRef() {
163 boolean colonPassed = false;
164 PsiElement child = getFirstChild();
165 while (child != null) {
166 IElementType tt = child.getNode().getElementType();
167 if (tt == JetTokens.COLON) {
168 colonPassed = true;
169 }
170 if (colonPassed && child instanceof JetTypeReference) {
171 return (JetTypeReference) child;
172 }
173 child = child.getNextSibling();
174 }
175
176 return null;
177 }
178
179 @NotNull
180 @Override
181 public JetElement asElement() {
182 return this;
183 }
184
185 @Override
186 public boolean isLocal() {
187 PsiElement parent = getParent();
188 return !(parent instanceof JetFile || parent instanceof JetClassBody);
189 }
190 }