/*
* Copyright 2010-2015 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.kotlin.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.search.LocalSearchScope;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.tree.TokenSet;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.KtNodeTypes;
import org.jetbrains.kotlin.lexer.KtTokens;
import org.jetbrains.kotlin.psi.stubs.KotlinParameterStub;
import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes;
import org.jetbrains.kotlin.psi.typeRefHelpers.TypeRefHelpersKt;
import java.util.Collections;
import java.util.List;
public class KtParameter extends KtNamedDeclarationStub<KotlinParameterStub> implements KtCallableDeclaration, KtValVarKeywordOwner {
public KtParameter(@NotNull ASTNode node) {
super(node);
}
public KtParameter(@NotNull KotlinParameterStub stub) {
super(stub, KtStubElementTypes.VALUE_PARAMETER);
}
@Override
public <R, D> R accept(@NotNull KtVisitor<R, D> visitor, D data) {
return visitor.visitParameter(this, data);
}
@Override
@Nullable
public KtTypeReference getTypeReference() {
return getStubOrPsiChild(KtStubElementTypes.TYPE_REFERENCE);
}
@Override
@Nullable
public KtTypeReference setTypeReference(@Nullable KtTypeReference typeRef) {
return TypeRefHelpersKt.setTypeReference(this, getNameIdentifier(), typeRef);
}
@Nullable
@Override
public PsiElement getColon() {
return findChildByType(KtTokens.COLON);
}
@Nullable
public PsiElement getEqualsToken() {
return findChildByType(KtTokens.EQ);
}
public boolean hasDefaultValue() {
KotlinParameterStub stub = getStub();
if (stub != null) {
return stub.hasDefaultValue();
}
return getDefaultValue() != null;
}
@Nullable
public KtExpression getDefaultValue() {
KotlinParameterStub stub = getStub();
if (stub != null && !stub.hasDefaultValue()) return null;
PsiElement equalsToken = getEqualsToken();
return equalsToken != null ? PsiTreeUtil.getNextSiblingOfType(equalsToken, KtExpression.class) : null;
}
public boolean isMutable() {
KotlinParameterStub stub = getStub();
if (stub != null) {
return stub.isMutable();
}
return findChildByType(KtTokens.VAR_KEYWORD) != null;
}
public boolean isVarArg() {
KtModifierList modifierList = getModifierList();
return modifierList != null && modifierList.hasModifier(KtTokens.VARARG_KEYWORD);
}
public boolean hasValOrVar() {
KotlinParameterStub stub = getStub();
if (stub != null) {
return stub.hasValOrVar();
}
return getValOrVarKeyword() != null;
}
@Nullable
public PsiElement getValOrVarKeyword() {
KotlinParameterStub stub = getStub();
if (stub != null && !stub.hasValOrVar()) {
return null;
}
return findChildByType(VAL_VAR_TOKEN_SET);
}
@Nullable
public KtDestructuringDeclaration getDestructuringDeclaration() {
// No destructuring declaration in stubs
if (getStub() != null) return null;
return findChildByType(KtNodeTypes.DESTRUCTURING_DECLARATION);
}
private static final TokenSet VAL_VAR_TOKEN_SET = TokenSet.create(KtTokens.VAL_KEYWORD, KtTokens.VAR_KEYWORD);
@Override
public ItemPresentation getPresentation() {
return ItemPresentationProviders.getItemPresentation(this);
}
public boolean isLoopParameter() {
return getParent() instanceof KtForExpression;
}
@Nullable
@Override
public KtParameterList getValueParameterList() {
return null;
}
@NotNull
@Override
public List<KtParameter> getValueParameters() {
return Collections.emptyList();
}
@Nullable
@Override
public KtTypeReference getReceiverTypeReference() {
return null;
}
@Nullable
@Override
public KtTypeParameterList getTypeParameterList() {
return null;
}
@Nullable
@Override
public KtTypeConstraintList getTypeConstraintList() {
return null;
}
@NotNull
@Override
public List<KtTypeConstraint> getTypeConstraints() {
return Collections.emptyList();
}
@NotNull
@Override
public List<KtTypeParameter> getTypeParameters() {
return Collections.emptyList();
}
@Nullable
public KtFunction getOwnerFunction() {
PsiElement parent = getParentByStub();
if (!(parent instanceof KtParameterList)) return null;
return ((KtParameterList) parent).getOwnerFunction();
}
@NotNull
@Override
public SearchScope getUseScope() {
KtExpression owner = getOwnerFunction();
if (owner instanceof KtPrimaryConstructor) {
if (hasValOrVar()) return super.getUseScope();
owner = ((KtPrimaryConstructor) owner).getContainingClassOrObject();
}
if (owner == null) {
owner = PsiTreeUtil.getParentOfType(this, KtExpression.class);
}
return new LocalSearchScope(owner != null ? owner : this);
}
}