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/*
* Copyright 2000-2009 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.intellij.psi.util.proximity;
import com.intellij.openapi.module.Module;
import com.intellij.openapi.module.ModuleUtil;
import com.intellij.openapi.util.NullableLazyKey;
import com.intellij.psi.*;
import com.intellij.psi.util.ProximityLocation;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.PsiUtilCore;
import com.intellij.util.NullableFunction;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
/**
* @author peter
*/
public class ExplicitlyImportedWeigher extends ProximityWeigher {
private static final NullableLazyKey<PsiPackage, ProximityLocation>
PLACE_PACKAGE = NullableLazyKey.create("placePackage", new NullableFunction<ProximityLocation, PsiPackage>() {
@Override
public PsiPackage fun(ProximityLocation location) {
PsiElement position = location.getPosition();
if (position == null) return null;
return getContextPackage(position);
}
});
@Nullable
private static PsiPackage getContextPackage(PsiElement position) {
PsiFile file = position.getContainingFile();
if (file == null) return null;
PsiFile originalFile = file.getOriginalFile();
while (true) {
PsiElement context = originalFile.getContext();
if (context == null) {
PsiDirectory parent = originalFile.getParent();
if (parent != null) {
return JavaDirectoryService.getInstance().getPackage(parent);
}
return null;
}
PsiFile containingFile = context.getContainingFile();
if (containingFile == null) return null;
originalFile = containingFile.getOriginalFile();
}
}
@Override
public Integer weigh(@NotNull final PsiElement element, @NotNull final ProximityLocation location) {
final PsiElement position = location.getPosition();
if (position == null){
return 0;
}
PsiUtilCore.ensureValid(position);
final PsiFile elementFile = element.getContainingFile();
final PsiFile positionFile = position.getContainingFile();
if (positionFile != null && elementFile != null && positionFile.getOriginalFile().equals(elementFile.getOriginalFile())) {
return 3;
}
if (element instanceof PsiClass) {
final String qname = ((PsiClass) element).getQualifiedName();
if (qname != null) {
final PsiJavaFile psiJavaFile = PsiTreeUtil.getContextOfType(position, PsiJavaFile.class, false);
if (psiJavaFile != null) {
PsiUtilCore.ensureValid(psiJavaFile);
final PsiImportList importList = psiJavaFile.getImportList();
if (importList != null) {
for (final PsiImportStatement importStatement : importList.getImportStatements()) {
final boolean onDemand = importStatement.isOnDemand();
final String imported = importStatement.getQualifiedName();
if (onDemand && qname.startsWith(imported + ".") || !onDemand && qname.equals(imported)) {
return 1;
}
}
}
}
}
}
if (element instanceof PsiMember) {
final PsiPackage placePackage = PLACE_PACKAGE.getValue(location);
if (placePackage != null) {
Module elementModule = ModuleUtil.findModuleForPsiElement(element);
if (location.getPositionModule() == elementModule && placePackage.equals(getContextPackage(element))) {
return 2;
}
}
}
return 0;
}
}
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