show usages from generated code in separate group (IDEA-97579)

java/java-impl/src/com/intellij/openapi/roots/JavaGeneratedSourcesFilter.java

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2000-2013 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.openapi.roots;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * @author nik
+ */
+public class JavaGeneratedSourcesFilter extends GeneratedSourcesFilter {
+  @Override
+  public boolean isGeneratedSource(@NotNull VirtualFile file, @NotNull Project project) {
+    return JavaProjectRootsUtil.isInGeneratedCode(file, project);
+  }
+}

java/java-impl/src/com/intellij/openapi/roots/JavaProjectRootsUtil.java

@@ -38,8 +38,7 @@ public class JavaProjectRootsUtil {
     for (Module module : ModuleManager.getInstance(project).getModules()) {
       for (ContentEntry entry : ModuleRootManager.getInstance(module).getContentEntries()) {
         for (SourceFolder sourceFolder : entry.getSourceFolders(JavaModuleSourceRootTypes.SOURCES)) {
-          JavaSourceRootProperties properties = sourceFolder.getJpsElement().getProperties(JavaModuleSourceRootTypes.SOURCES);
-          if (properties != null && !properties.isForGeneratedSources()) {
+          if (!isForGeneratedSources(sourceFolder)) {
             ContainerUtil.addIfNotNull(roots, sourceFolder.getFile());
           }
         }
@@ -47,4 +46,27 @@ public class JavaProjectRootsUtil {
     }
     return roots;
   }
+
+  private static boolean isForGeneratedSources(SourceFolder sourceFolder) {
+    JavaSourceRootProperties properties = sourceFolder.getJpsElement().getProperties(JavaModuleSourceRootTypes.SOURCES);
+    return properties != null && properties.isForGeneratedSources();
+  }
+
+  public static boolean isInGeneratedCode(@NotNull VirtualFile file, @NotNull Project project) {
+    ProjectFileIndex fileIndex = ProjectRootManager.getInstance(project).getFileIndex();
+    Module module = fileIndex.getModuleForFile(file);
+    if (module == null) return false;
+
+    VirtualFile sourceRoot = fileIndex.getSourceRootForFile(file);
+    if (sourceRoot == null) return false;
+
+    for (ContentEntry entry : ModuleRootManager.getInstance(module).getContentEntries()) {
+      for (SourceFolder folder : entry.getSourceFolders()) {
+        if (sourceRoot.equals(folder.getFile())) {
+          return isForGeneratedSources(folder);
+        }
+      }
+    }
+    return false;
+  }
 }