VirtualFileFinder update to search files without kotlin headers

idea/src/org/jetbrains/jet/plugin/vfilefinder/IDEVirtualFileFinder.java

@@ -16,9 +16,12 @@
 
 package org.jetbrains.jet.plugin.vfilefinder;
 
+import com.intellij.openapi.components.ServiceManager;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.psi.PsiClass;
+import com.intellij.psi.impl.file.impl.JavaFileManager;
 import com.intellij.psi.search.GlobalSearchScope;
 import com.intellij.util.indexing.FileBasedIndex;
 import org.jetbrains.annotations.NotNull;
@@ -52,4 +55,26 @@ public final class IDEVirtualFileFinder extends VirtualFileKotlinClassFinder imp
         }
         return files.iterator().next();
     }
+
+    @Override
+    public VirtualFile findVirtualFile(@NotNull String internalName) {
+        JavaFileManager fileFinder = ServiceManager.getService(project, JavaFileManager.class);
+
+        String qName = internalName.replace('/', '.');
+        PsiClass psiClass = fileFinder.findClass(qName, GlobalSearchScope.allScope(project));
+        if (psiClass == null) {
+            int dollarIndex = qName.indexOf('$');
+            assert dollarIndex > 0 : "Only inner classes could be found with this patch: " + internalName;
+            String newName = qName.substring(0, dollarIndex);
+            psiClass = fileFinder.findClass(newName, GlobalSearchScope.allScope(project));
+            if (psiClass != null) {
+                int i = qName.lastIndexOf('.');
+                return psiClass.getContainingFile().getVirtualFile().getParent().findChild(qName.substring(i + 1) + ".class");
+            }
+        }
+        if (psiClass != null) {
+            return psiClass.getContainingFile().getVirtualFile();
+        }
+        return null;
+    }
 }