java/java-indexing-impl/src/com/intellij/psi/impl/search/JavaSourceFilterScope.java

/*
 * 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.
 */

/*
 * @author max
 */
package com.intellij.psi.impl.search;

import com.intellij.ide.highlighter.JavaClassFileType;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.roots.JdkOrderEntry;
import com.intellij.openapi.roots.OrderEntry;
import com.intellij.openapi.roots.ProjectFileIndex;
import com.intellij.openapi.roots.ProjectRootManager;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.psi.SdkResolveScopeProvider;
import com.intellij.psi.search.DelegatingGlobalSearchScope;
import com.intellij.psi.search.GlobalSearchScope;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public class JavaSourceFilterScope extends DelegatingGlobalSearchScope {
  private static final Logger LOG = Logger.getInstance(JavaSourceFilterScope.class);

  @Nullable
  private final ProjectFileIndex myIndex;

  public JavaSourceFilterScope(@NotNull final GlobalSearchScope delegate) {
    super(delegate);

    Project project = getProject();
    if (project != null) {
      myIndex = ProjectRootManager.getInstance(project).getFileIndex();
    }
    else {
      myIndex = null;
      LOG.error("delegate.getProject() == null, delegate.getClass() == " + delegate.getClass());
    }
  }

  @Override
  public boolean contains(@NotNull final VirtualFile file) {
    if (!super.contains(file)) {
      return false;
    }

    if (myIndex == null) {
      return false;
    }

    if (JavaClassFileType.INSTANCE == file.getFileType()) {
      return myIndex.isInLibraryClasses(file);
    }

    if (myIndex.isInSourceContent(file)) {
      return true;
    }
    final Project project = getProject();

    if (project != null) {
      for (OrderEntry entry : myIndex.getOrderEntriesForFile(file)) {
        if (entry instanceof JdkOrderEntry) {
          final JdkOrderEntry jdkOrderEntry = (JdkOrderEntry)entry;

          for (SdkResolveScopeProvider provider : SdkResolveScopeProvider.EP_NAME.getExtensions()) {
            final GlobalSearchScope scope = provider.getScope(project, jdkOrderEntry);

            if (scope != null && scope.contains(file)) {
              return true;
            }
          }
        }
      }
    }
    return false;
  }

}