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/*
* Copyright 2000-2014 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 com.jetbrains.python.hierarchy.call;
import com.google.common.collect.Lists;
import com.intellij.find.findUsages.FindUsagesHandler;
import com.intellij.find.findUsages.FindUsagesOptions;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.usageView.UsageInfo;
import com.intellij.util.ArrayUtil;
import com.intellij.util.CommonProcessors;
import com.jetbrains.python.PyNames;
import com.jetbrains.python.findUsages.PyClassFindUsagesHandler;
import com.jetbrains.python.findUsages.PyFunctionFindUsagesHandler;
import com.jetbrains.python.psi.*;
import com.jetbrains.python.psi.impl.PyBuiltinCache;
import com.jetbrains.python.psi.resolve.PyResolveContext;
import com.jetbrains.python.psi.search.PySuperMethodsSearch;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collection;
import java.util.List;
/**
* @author novokrest
*/
public class PyStaticCallHierarchyUtil {
public static Collection<PsiElement> getCallees(@NotNull PyElement element) {
final List<PsiElement> callees = Lists.newArrayList();
final PyRecursiveElementVisitor visitor = new PyRecursiveElementVisitor() {
@Override
public void visitPyParameterList(PyParameterList node) {
}
@Override
public void visitPyLambdaExpression(PyLambdaExpression node) {
}
@Override
public void visitPyFunction(PyFunction innerFunction) {
for (PyParameter parameter : innerFunction.getParameterList().getParameters()) {
PsiElement defaultValue = parameter.getDefaultValue();
if (defaultValue != null) {
defaultValue.accept(this);
}
}
}
@Override
public void visitPyCallExpression(PyCallExpression callExpression) {
super.visitPyCallExpression(callExpression);
PsiElement calleeFunction = callExpression.resolveCalleeFunction(PyResolveContext.defaultContext());
if (calleeFunction instanceof PyFunction) {
callees.add(calleeFunction);
}
}
};
visitor.visitElement(element);
return callees;
}
public static Collection<PsiElement> getCallers(@NotNull PyElement pyElement) {
final List<PsiElement> callers = Lists.newArrayList();
final Collection<UsageInfo> usages = findUsages(pyElement);
for (UsageInfo usage : usages) {
PsiElement element = usage.getElement();
if (element == null) {
continue;
}
element = element.getParent();
while (element instanceof PyParenthesizedExpression) {
element = element.getParent();
}
if (element instanceof PyCallExpression) {
PsiElement caller = PsiTreeUtil.getParentOfType(element, PyParameterList.class, PyFunction.class);
if (caller instanceof PyFunction) {
callers.add(caller);
}
else if (caller instanceof PyParameterList) {
PsiElement innerFunction = PsiTreeUtil.getParentOfType(caller, PyFunction.class);
PsiElement outerFunction = PsiTreeUtil.getParentOfType(innerFunction, PyFunction.class);
if (innerFunction != null && outerFunction != null) {
callers.add(outerFunction);
}
}
}
}
return callers;
}
private static Collection<UsageInfo> findUsages(@NotNull final PsiElement element) {
final FindUsagesHandler handler = createFindUsageHandler(element);
if (handler == null) {
return Lists.newArrayList();
}
final CommonProcessors.CollectProcessor<UsageInfo> processor = new CommonProcessors.CollectProcessor<UsageInfo>();
final PsiElement[] psiElements = ArrayUtil.mergeArrays(handler.getPrimaryElements(), handler.getSecondaryElements());
final FindUsagesOptions options = handler.getFindUsagesOptions(null);
for (PsiElement psiElement : psiElements) {
handler.processElementUsages(psiElement, processor, options);
}
return processor.getResults();
}
/**
* @see {@link com.jetbrains.python.findUsages.PyFindUsagesHandlerFactory#createFindUsagesHandler(com.intellij.psi.PsiElement, boolean) createFindUsagesHandler}
*/
@Nullable
private static FindUsagesHandler createFindUsageHandler(@NotNull final PsiElement element) {
if (element instanceof PyFunction) {
final Collection<PsiElement> superMethods = PySuperMethodsSearch.search((PyFunction)element, true).findAll();
if (superMethods.size() > 0) {
final PsiElement next = superMethods.iterator().next();
if (next instanceof PyFunction && !isInObject((PyFunction)next)) {
List<PsiElement> allMethods = Lists.newArrayList();
allMethods.add(element);
allMethods.addAll(superMethods);
return new PyFunctionFindUsagesHandler(element, allMethods);
}
}
return new PyFunctionFindUsagesHandler(element);
}
if (element instanceof PyClass) {
return new PyClassFindUsagesHandler((PyClass)element);
}
return null;
}
/**
* @see {@link com.jetbrains.python.findUsages.PyFindUsagesHandlerFactory#isInObject(com.jetbrains.python.psi.PyFunction) isInObject}
*/
private static boolean isInObject(PyFunction fun) {
final PyClass containingClass = fun.getContainingClass();
if (containingClass == null) {
return false;
}
return (PyNames.FAKE_OLD_BASE.equals(containingClass.getName()) ||
(PyNames.OBJECT.equals(containingClass.getName()) && PyBuiltinCache.getInstance(fun).isBuiltin(containingClass)));
}
}
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