Added ClsCustomNavigationPolicy.

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClsClassImpl.java

@@ -18,6 +18,7 @@ package com.intellij.psi.impl.compiled;
 import com.intellij.navigation.ItemPresentation;
 import com.intellij.navigation.ItemPresentationProviders;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.ui.Queryable;
 import com.intellij.openapi.util.Key;
 import com.intellij.openapi.util.Pair;
@@ -576,6 +577,13 @@ public class ClsClassImpl extends ClsRepositoryPsiElement<PsiClassStub<?>> imple
   @Override
   @NotNull
   public PsiElement getNavigationElement() {
+    for (ClsCustomNavigationPolicy customNavigationPolicy : Extensions.getExtensions(ClsCustomNavigationPolicy.EP_NAME)) {
+      PsiElement navigationElement = customNavigationPolicy.getNavigationElement(this);
+      if (navigationElement != null) {
+        return navigationElement;
+      }
+    }
+
     PsiClass aClass = getSourceMirrorClass();
     return aClass != null && aClass != this ? aClass.getNavigationElement() : this;
   }

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClsCustomNavigationPolicy.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2000-2012 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 com.intellij.psi.impl.compiled;
+
+import com.intellij.openapi.extensions.ExtensionPointName;
+import com.intellij.psi.PsiElement;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * @author Evgeny Gerashchenko
+ * @since 3/2/12
+ */
+public interface ClsCustomNavigationPolicy {
+  ExtensionPointName<ClsCustomNavigationPolicy> EP_NAME = ExtensionPointName.create("com.intellij.psi.clsCustomNavigationPolicy");
+
+  @Nullable
+  PsiElement getNavigationElement(@NotNull ClsClassImpl clsClass);
+
+  @Nullable
+  PsiElement getNavigationElement(@NotNull ClsMethodImpl clsMethod);
+
+  @Nullable
+  PsiElement getNavigationElement(@NotNull ClsFieldImpl clsField);
+}

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClsFieldImpl.java

@@ -18,6 +18,7 @@ package com.intellij.psi.impl.compiled;
 import com.intellij.navigation.ItemPresentation;
 import com.intellij.navigation.ItemPresentationProviders;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.*;
@@ -247,6 +248,13 @@ public class ClsFieldImpl extends ClsRepositoryPsiElement<PsiFieldStub> implemen
   @Override
   @NotNull
   public PsiElement getNavigationElement() {
+    for (ClsCustomNavigationPolicy customNavigationPolicy : Extensions.getExtensions(ClsCustomNavigationPolicy.EP_NAME)) {
+      PsiElement navigationElement = customNavigationPolicy.getNavigationElement(this);
+      if (navigationElement != null) {
+        return navigationElement;
+      }
+    }
+
     PsiClass sourceClassMirror = ((ClsClassImpl)getParent()).getSourceMirrorClass();
     PsiElement sourceFieldMirror = sourceClassMirror != null ? sourceClassMirror.findFieldByName(getName(), false) : null;
     return sourceFieldMirror != null && sourceFieldMirror != this ? sourceFieldMirror.getNavigationElement() : this;

java/java-psi-impl/src/com/intellij/psi/impl/compiled/ClsMethodImpl.java

@@ -18,6 +18,7 @@ package com.intellij.psi.impl.compiled;
 import com.intellij.navigation.ItemPresentation;
 import com.intellij.navigation.ItemPresentationProviders;
 import com.intellij.openapi.diagnostic.Logger;
+import com.intellij.openapi.extensions.Extensions;
 import com.intellij.openapi.util.text.StringUtil;
 import com.intellij.psi.*;
 import com.intellij.psi.impl.ElementPresentationUtil;
@@ -379,6 +380,13 @@ public class ClsMethodImpl extends ClsRepositoryPsiElement<PsiMethodStub> implem
   @Override
   @NotNull
   public PsiElement getNavigationElement() {
+    for (ClsCustomNavigationPolicy customNavigationPolicy : Extensions.getExtensions(ClsCustomNavigationPolicy.EP_NAME)) {
+      PsiElement navigationElement = customNavigationPolicy.getNavigationElement(this);
+      if (navigationElement != null) {
+        return navigationElement;
+      }
+    }
+
     final PsiMethod method = getSourceMirrorMethod();
     return method != this ? method.getNavigationElement() : this;
   }

platform/platform-resources/src/META-INF/LangExtensionPoints.xml

@@ -529,7 +529,10 @@
   <extensionPoint name="psi.treeChangePreprocessor"
                   interface="com.intellij.psi.impl.PsiTreeChangePreprocessor"
                   area="IDEA_PROJECT"/>
-  
+
+  <extensionPoint name="psi.clsCustomNavigationPolicy"
+                  interface="com.intellij.psi.impl.compiled.ClsCustomNavigationPolicy" />
+
   <extensionPoint name="codeBlockProvider"
                   beanClass="com.intellij.lang.LanguageExtensionPoint"/>