InResolveScopeWeigher.java

/*
 * Copyright 2000-2016 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.openapi.vfs.VirtualFile;
import com.intellij.psi.PsiElement;
import com.intellij.psi.search.GlobalSearchScope;
import com.intellij.psi.util.ProximityLocation;
import com.intellij.psi.util.PsiUtilCore;
import org.jetbrains.annotations.NotNull;

/**
 * @author peter
*/
public class InResolveScopeWeigher extends ProximityWeigher {
  private static final NotNullLazyKey<GlobalSearchScope, ProximityLocation> PLACE_SCOPE = NotNullLazyKey.create("placeScope", location -> {
    PsiElement position = location.getPosition();
    return position == null ? GlobalSearchScope.EMPTY_SCOPE : position.getResolveScope();
  });


  @Override
  public Comparable weigh(@NotNull final PsiElement element, @NotNull final ProximityLocation location) {
    VirtualFile elementFile = PsiUtilCore.getVirtualFile(element);
    return elementFile != null && PLACE_SCOPE.getValue(location).contains(elementFile);
  }
}