/*
* 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.idea.hierarchy.calls;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiMethod;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.descriptors.DeclarationDescriptor;
import org.jetbrains.kotlin.descriptors.FunctionDescriptor;
import org.jetbrains.kotlin.descriptors.PropertyDescriptor;
import org.jetbrains.kotlin.psi.*;
import org.jetbrains.kotlin.resolve.BindingContext;
import org.jetbrains.kotlin.resolve.DescriptorToSourceUtils;
public abstract class CalleeReferenceVisitorBase extends KtTreeVisitorVoid {
private final BindingContext bindingContext;
private final boolean deepTraversal;
protected CalleeReferenceVisitorBase(BindingContext bindingContext, boolean deepTraversal) {
this.bindingContext = bindingContext;
this.deepTraversal = deepTraversal;
}
protected abstract void processDeclaration(KtSimpleNameExpression reference, PsiElement declaration);
@Override
public void visitKtElement(@NotNull KtElement element) {
if (deepTraversal || !(element instanceof KtClassOrObject || element instanceof KtNamedFunction)) {
super.visitKtElement(element);
}
}
@Override
public void visitSimpleNameExpression(@NotNull KtSimpleNameExpression expression) {
DeclarationDescriptor descriptor = bindingContext.get(BindingContext.REFERENCE_TARGET, expression);
if (descriptor == null) return;
PsiElement declaration = DescriptorToSourceUtils.descriptorToDeclaration(descriptor);
if (declaration == null) return;
if (isProperty(descriptor, declaration) || isCallable(descriptor, declaration, expression)) {
processDeclaration(expression, declaration);
}
}
// Accept callees of JetCallElement which refer to Kotlin function, Kotlin class or Java method
private static boolean isCallable(DeclarationDescriptor descriptor, PsiElement declaration, KtSimpleNameExpression reference) {
KtCallElement callElement = PsiTreeUtil.getParentOfType(reference, KtCallElement.class);
if (callElement == null || !PsiTreeUtil.isAncestor(callElement.getCalleeExpression(), reference, false)) return false;
return descriptor instanceof FunctionDescriptor
&& (declaration instanceof KtClassOrObject
|| declaration instanceof KtNamedFunction
|| declaration instanceof PsiMethod);
}
// Accept only properties (not local variables or references to Java fields)
private static boolean isProperty(DeclarationDescriptor descriptor, PsiElement declaration) {
return descriptor instanceof PropertyDescriptor && declaration instanceof KtProperty;
}
}