/*
* 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.util.NotNullLazyKey;
import com.intellij.psi.PsiClass;
import com.intellij.psi.PsiElement;
import com.intellij.psi.PsiFile;
import com.intellij.psi.PsiMember;
import com.intellij.psi.util.ProximityLocation;
import com.intellij.psi.util.PsiTreeUtil;
import org.jetbrains.annotations.NotNull;
/**
* @author peter
*/
public class SamePsiMemberWeigher extends ProximityWeigher {
private static final NotNullLazyKey<Boolean, ProximityLocation> INSIDE_PSI_MEMBER = NotNullLazyKey.create("insidePsiMember",
proximityLocation -> PsiTreeUtil.getContextOfType(proximityLocation.getPosition(), PsiMember.class, false) != null);
private static final NotNullLazyKey<PsiElement, ProximityLocation> PHYSICAL_POSITION = NotNullLazyKey.create("physicalPosition",
location -> {
PsiElement position = location.getPosition();
assert position != null;
if (!position.isPhysical()) {
final PsiFile file = position.getContainingFile();
if (file != null) {
final PsiFile originalFile = file.getOriginalFile();
final int offset = position.getTextRange().getStartOffset();
PsiElement candidate = originalFile.findElementAt(offset);
if (candidate == null) {
candidate = originalFile.findElementAt(offset - 1);
}
if (candidate != null) {
return candidate;
}
}
}
return position;
});
@Override
public Comparable weigh(@NotNull final PsiElement element, @NotNull final ProximityLocation location) {
PsiElement position = location.getPosition();
if (position == null){
return null;
}
if (!INSIDE_PSI_MEMBER.getValue(location)) {
return 0;
}
if (element.isPhysical()) {
position = PHYSICAL_POSITION.getValue(location);
}
final PsiMember member = PsiTreeUtil.getContextOfType(PsiTreeUtil.findCommonContext(position, element), PsiMember.class, false);
if (member instanceof PsiClass) return 1;
if (member != null) return 2;
return 0;
}
}