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/*
* Copyright 2000-2013 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.psi.impl;
import com.google.common.base.Predicate;
import com.google.common.collect.Iterables;
import com.intellij.lang.ASTNode;
import com.intellij.navigation.ItemPresentation;
import com.intellij.psi.PsiElement;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.util.containers.HashSet;
import com.jetbrains.python.psi.*;
import com.jetbrains.python.psi.resolve.PyResolveContext;
import com.jetbrains.python.psi.resolve.RatedResolveResult;
import com.jetbrains.python.psi.types.PyModuleType;
import com.jetbrains.python.toolbox.ChainIterable;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import java.util.Collections;
import java.util.List;
/**
* @author dcheryasov
*/
public class PyStarImportElementImpl extends PyElementImpl implements PyStarImportElement {
public PyStarImportElementImpl(ASTNode astNode) {
super(astNode);
}
@NotNull
public Iterable<PyElement> iterateNames() {
if (getParent() instanceof PyFromImportStatement) {
PyFromImportStatement fromImportStatement = (PyFromImportStatement)getParent();
final List<PsiElement> importedFiles = fromImportStatement.resolveImportSourceCandidates();
ChainIterable<PyElement> chain = new ChainIterable<PyElement>();
for (PsiElement importedFile : new HashSet<PsiElement>(importedFiles)) { // resolver gives lots of duplicates
final PsiElement source = PyUtil.turnDirIntoInit(importedFile);
if (source instanceof PyFile) {
final PyFile sourceFile = (PyFile)source;
chain.add(filterStarImportableNames(sourceFile.iterateNames(), sourceFile));
}
}
return chain;
}
return Collections.emptyList();
}
@NotNull
private static Iterable<PyElement> filterStarImportableNames(@NotNull Iterable<PyElement> declaredNames, @NotNull final PyFile file) {
return Iterables.filter(declaredNames, new Predicate<PyElement>() {
@Override
public boolean apply(@Nullable PyElement input) {
final String name = input != null ? input.getName() : null;
return name != null && PyUtil.isStarImportableFrom(name, file);
}
});
}
@Nullable
public PsiElement getElementNamed(final String name) {
if (PyUtil.isClassPrivateName(name)) {
return null;
}
if (getParent() instanceof PyFromImportStatement) {
PyFromImportStatement fromImportStatement = (PyFromImportStatement)getParent();
final List<PsiElement> importedFiles = fromImportStatement.resolveImportSourceCandidates();
for (PsiElement importedFile : new HashSet<PsiElement>(importedFiles)) { // resolver gives lots of duplicates
final PsiElement source = PyUtil.turnDirIntoInit(importedFile);
if (source instanceof PyFile) {
PyFile sourceFile = (PyFile)source;
final PyModuleType moduleType = new PyModuleType(sourceFile);
final List<? extends RatedResolveResult> results = moduleType.resolveMember(name, null, AccessDirection.READ,
PyResolveContext.defaultContext());
final PsiElement result = results != null && !results.isEmpty() ? results.get(0).getElement() : null;
if (result != null && PyUtil.isStarImportableFrom(name, sourceFile) ) {
return result;
}
}
}
}
return null;
}
public boolean mustResolveOutside() {
return true; // we don't have children, but...
}
@Override
public ItemPresentation getPresentation() {
return new ItemPresentation() {
private String getName() {
PyFromImportStatement elt = PsiTreeUtil.getParentOfType(PyStarImportElementImpl.this, PyFromImportStatement.class);
if (elt != null) { // always? who knows :)
PyReferenceExpression imp_src = elt.getImportSource();
if (imp_src != null) {
return PyPsiUtils.toPath(imp_src);
}
}
return "<?>";
}
public String getPresentableText() {
return getName();
}
public String getLocationString() {
return "| " + "from " + getName() + " import *";
}
public Icon getIcon(final boolean open) {
return null;
}
};
}
@Override
protected void acceptPyVisitor(PyElementVisitor pyVisitor) {
pyVisitor.visitPyStarImportElement(this);
}
}
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