Index package FqNames for files

compiler/frontend/src/org/jetbrains/jet/lang/psi/stubs/elements/JetFileElementType.java

@@ -82,6 +82,6 @@ public class JetFileElementType extends IStubFileElementType<PsiJetFileStub> {
 
     @Override
     public void indexStub(final PsiJetFileStub stub, final IndexSink sink) {
-        // Don't index file
+        StubIndexServiceFactory.getInstance().indexFile(stub, sink);
     }
 }

compiler/frontend/src/org/jetbrains/jet/lang/psi/stubs/elements/StubIndexService.java

@@ -25,6 +25,10 @@ public interface StubIndexService {
      * Default implementation with no indexing.
      */
     StubIndexService NO_INDEX_SERVICE = new StubIndexService() {
+        @Override
+        public void indexFile(PsiJetFileStub stub, IndexSink sink) {
+        }
+
         @Override
         public void indexClass(PsiJetClassStub stub, IndexSink sink) {
         }
@@ -46,6 +50,7 @@ public interface StubIndexService {
         }
     };
 
+    void indexFile(PsiJetFileStub stub, IndexSink sink);
     void indexClass(PsiJetClassStub stub, IndexSink sink);
     void indexFunction(PsiJetFunctionStub stub, IndexSink sink);
     void indexObject(PsiJetObjectStub stub, IndexSink sink);

idea/src/META-INF/plugin.xml

@@ -203,6 +203,7 @@
       <java.shortNamesCache implementation="org.jetbrains.jet.plugin.caches.JetShortNamesCache"/>
 
       <stubElementTypeHolder class="org.jetbrains.jet.lang.psi.stubs.elements.JetStubElementTypes"/>
+      <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetPackageDeclarationIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetShortClassNameIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetFullClassNameIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetShortFunctionNameIndex"/>

idea/src/org/jetbrains/jet/plugin/stubindex/JetIndexKeys.java

@@ -20,6 +20,8 @@ import com.intellij.psi.stubs.StubIndexKey;
 import org.jetbrains.jet.lang.psi.*;
 
 public interface JetIndexKeys {
+    StubIndexKey<String, JetFile> PACKAGE_DECLARATION_KEY = StubIndexKey.createIndexKey("jet.file.package.declaration");
+
     StubIndexKey<String, JetClassOrObject> SHORT_NAME_KEY = StubIndexKey.createIndexKey("jet.class.shortName");
     StubIndexKey<String, JetClassOrObject> SUPERCLASS_NAME_KEY = StubIndexKey.createIndexKey("jet.class.superClassName");
     StubIndexKey<String, JetClassOrObject> FQN_KEY = StubIndexKey.createIndexKey("jet.fqn");

idea/src/org/jetbrains/jet/plugin/stubindex/JetPackageDeclarationIndex.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2012 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 org.jetbrains.jet.plugin.stubindex;
+
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.psi.stubs.StringStubIndexExtension;
+import com.intellij.psi.stubs.StubIndexKey;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.jet.lang.psi.JetFile;
+
+import java.util.Collection;
+
+public class JetPackageDeclarationIndex extends StringStubIndexExtension<JetFile> {
+    private static final JetPackageDeclarationIndex ourInstance = new JetPackageDeclarationIndex();
+
+    public static JetPackageDeclarationIndex getInstance() {
+        return ourInstance;
+    }
+
+    @NotNull
+    @Override
+    public StubIndexKey<String, JetFile> getKey() {
+        return JetIndexKeys.PACKAGE_DECLARATION_KEY;
+    }
+
+    @Override
+    public Collection<JetFile> get(final String fqName, final Project project, @NotNull final GlobalSearchScope scope) {
+        return super.get(fqName, project, new JetSourceFilterScope(scope));
+    }
+}

idea/src/org/jetbrains/jet/plugin/stubindex/StubIndexServiceImpl.java

@@ -23,6 +23,12 @@ import org.jetbrains.jet.lang.resolve.name.FqName;
 
 public class StubIndexServiceImpl implements StubIndexService {
 
+    @Override
+    public void indexFile(PsiJetFileStub stub, IndexSink sink) {
+        String packageName = stub.getPackageName();
+        sink.occurrence(JetIndexKeys.PACKAGE_DECLARATION_KEY, packageName == null ? "" : packageName);
+    }
+
     @Override
     public void indexClass(PsiJetClassStub stub, IndexSink sink) {
         String name = stub.getName();