| /* |
| * Copyright 2016 The Bazel Authors. All rights reserved. |
| * |
| * 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.google.idea.blaze.base.lang.buildfile.search; |
| |
| import com.google.idea.blaze.base.lang.buildfile.language.BuildFileType; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiFileSystemItem; |
| import com.intellij.psi.search.EverythingGlobalScope; |
| import com.intellij.psi.search.GlobalSearchScope; |
| import com.intellij.psi.search.UseScopeOptimizer; |
| import javax.annotation.Nullable; |
| |
| /** |
| * Causes all calls to PsiSearchHelper.getUseScope to exclude BUILD files, when searching for files. |
| * <br> |
| * BUILD file / BUILD package references are handled by a separate reference searcher. |
| * |
| * <p>This is a hack, but greatly improves efficiency. The reasoning behind this: |
| * <li>BUILD files have very strict file reference patterns, and very narrow direct reference scopes |
| * (a package can't directly reference files in another package). |
| * <li>IJ *constantly* performs global searches on strings when manipulating files (e.g. searching |
| * for file uses for highlighting, rename, move operations). This causes us to re-parse every |
| * BUILD file in the project, multiple times. |
| */ |
| public class ExcludeBuildFilesScope extends UseScopeOptimizer { |
| |
| @Nullable |
| @Override |
| public GlobalSearchScope getScopeToExclude(PsiElement element) { |
| if (element instanceof PsiFileSystemItem) { |
| return GlobalSearchScope.getScopeRestrictedByFileTypes( |
| new EverythingGlobalScope(), BuildFileType.INSTANCE); |
| } |
| return null; |
| } |
| } |