Indexing all packages, including ones declared implicitly

idea/src/META-INF/plugin.xml

@@ -204,6 +204,7 @@
 
       <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.JetAllPackagesIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetClassByPackageIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetShortClassNameIndex"/>
       <stubIndex implementation="org.jetbrains.jet.plugin.stubindex.JetFullClassNameIndex"/>

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

@@ -0,0 +1,55 @@
+/*
+ * 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;
+
+/**
+ * Contains all packages, i.e. if a file declares
+ *   package a.b.c
+ *
+ * Three packages "a", "a.b" and "a.b.c" will be registered in this index
+ */
+public class JetAllPackagesIndex extends StringStubIndexExtension<JetFile> {
+    private static final StubIndexKey<String, JetFile> KEY = KotlinIndexUtil.createIndexKey(JetAllPackagesIndex.class);
+
+    private static final JetAllPackagesIndex ourInstance = new JetAllPackagesIndex();
+
+    public static JetAllPackagesIndex getInstance() {
+        return ourInstance;
+    }
+
+    private JetAllPackagesIndex() {}
+
+    @NotNull
+    @Override
+    public StubIndexKey<String, JetFile> getKey() {
+        return 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/JetPackageDeclarationIndex.java

@@ -25,6 +25,12 @@ import org.jetbrains.jet.lang.psi.JetFile;
 
 import java.util.Collection;
 
+/**
+ * Explicitly declared packages, i.e. if a file declares
+ *   package a.b.c
+ *
+ * Only "a.b.c" will be registered, not "a" nor "a.b"
+ */
 public class JetPackageDeclarationIndex extends StringStubIndexExtension<JetFile> {
     private static final StubIndexKey<String, JetFile> KEY = KotlinIndexUtil.createIndexKey(JetPackageDeclarationIndex.class);
 

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

@@ -27,7 +27,17 @@ public class StubIndexServiceImpl implements StubIndexService {
     @Override
     public void indexFile(PsiJetFileStub stub, IndexSink sink) {
         String packageName = stub.getPackageName();
-        sink.occurrence(JetPackageDeclarationIndex.getInstance().getKey(), packageName == null ? "" : packageName);
+        FqName fqName = new FqName(packageName == null ? "" : packageName);
+
+        sink.occurrence(JetPackageDeclarationIndex.getInstance().getKey(), fqName.getFqName());
+
+        while (true) {
+            sink.occurrence(JetAllPackagesIndex.getInstance().getKey(), fqName.getFqName());
+            if (fqName.isRoot()) {
+                return;
+            }
+            fqName = fqName.parent();
+        }
     }
 
     @Override