introduced FileTypeSpecificInputFilter for index to expose its applicability to specific file types: allows us to have faster calculation of affected indices candidates

images/src/org/intellij/images/index/ImageInfoIndex.java

@@ -46,16 +46,6 @@ public class ImageInfoIndex extends SingleEntryFileBasedIndexExtension<ImageInfo
 
   public static final ID<Integer, ImageInfo> INDEX_ID = ID.create("ImageFileInfoIndex");
 
-  private final FileBasedIndex.InputFilter myInputFilter = new FileBasedIndex.InputFilter() {
-    @Override
-    public boolean acceptInput(final VirtualFile file) {
-      return (file.getFileSystem() == LocalFileSystem.getInstance() || file.getFileSystem() instanceof TempFileSystem) &&
-             file.getFileType() == ImageFileTypeManager.getInstance().getImageFileType() &&
-             (file.getLength() / 1024) < ourMaxImageSize
-        ;
-    }
-  };
-
   private final DataExternalizer<ImageInfo> myValueExternalizer = new DataExternalizer<ImageInfo>() {
     @Override
     public void save(final DataOutput out, final ImageInfo info) throws IOException {
@@ -102,7 +92,14 @@ public class ImageInfoIndex extends SingleEntryFileBasedIndexExtension<ImageInfo
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return myInputFilter;
+    return new DefaultFileTypeSpecificInputFilter(ImageFileTypeManager.getInstance().getImageFileType()) {
+      @Override
+      public boolean acceptInput(final VirtualFile file) {
+        return (file.getFileSystem() == LocalFileSystem.getInstance() || file.getFileSystem() instanceof TempFileSystem) &&
+               (file.getLength() / 1024) < ourMaxImageSize
+          ;
+      }
+    };
   }
 
   @Override

platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/id/IdIndex.java

@@ -20,7 +20,6 @@ import com.intellij.lang.cacheBuilder.CacheBuilderRegistry;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.fileTypes.LanguageFileType;
 import com.intellij.openapi.fileTypes.impl.CustomSyntaxTableFileType;
-import com.intellij.openapi.project.ProjectCoreUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.util.indexing.*;
 import com.intellij.util.io.DataExternalizer;
@@ -45,8 +44,7 @@ public class IdIndex extends FileBasedIndexExtension<IdIndexEntry, Integer> {
   private final FileBasedIndex.InputFilter myInputFilter = new FileBasedIndex.InputFilter() {
     @Override
     public boolean acceptInput(final VirtualFile file) {
-      final FileType fileType = file.getFileType();
-      return isIndexable(fileType) && !ProjectCoreUtil.isProjectOrWorkspaceFile(file, fileType);
+      return isIndexable(file.getFileType());
     }
   };
 

platform/lang-impl/src/com/intellij/framework/detection/impl/FrameworkDetectionIndex.java

@@ -20,7 +20,6 @@ import com.intellij.openapi.Disposable;
 import com.intellij.openapi.diagnostic.Logger;
 import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.util.Pair;
-import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.patterns.ElementPattern;
 import com.intellij.util.EventDispatcher;
 import com.intellij.util.containers.MultiMap;
@@ -37,7 +36,7 @@ import java.util.*;
 public class FrameworkDetectionIndex extends ScalarIndexExtension<Integer> {
   private static final Logger LOG = Logger.getInstance("#com.intellij.framework.detection.impl.FrameworkDetectionIndex");
   public static final ID<Integer,Void> NAME = ID.create("FrameworkDetectionIndex");
-  private FileTypesInputFilter myInputFilter;
+
   private final FrameworkDetectorRegistry myRegistry;
   private final EventDispatcher<FrameworkDetectionIndexListener> myDispatcher = EventDispatcher.create(FrameworkDetectionIndexListener.class);
 
@@ -99,14 +98,11 @@ public class FrameworkDetectionIndex extends ScalarIndexExtension<Integer> {
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    if (myInputFilter == null) {
-      final Set<FileType> acceptedTypes = new HashSet<FileType>();
-      for (FrameworkDetector detector : FrameworkDetector.EP_NAME.getExtensions()) {
-        acceptedTypes.add(detector.getFileType());
-      }
-      myInputFilter = new FileTypesInputFilter(acceptedTypes);
+    final Set<FileType> acceptedTypes = new HashSet<FileType>();
+    for (FrameworkDetector detector : FrameworkDetector.EP_NAME.getExtensions()) {
+      acceptedTypes.add(detector.getFileType());
     }
-    return myInputFilter;
+    return new DefaultFileTypeSpecificInputFilter(acceptedTypes.toArray(new FileType[acceptedTypes.size()]));
   }
 
   @Override
@@ -118,17 +114,4 @@ public class FrameworkDetectionIndex extends ScalarIndexExtension<Integer> {
   public int getVersion() {
     return myRegistry.getDetectorsVersion();
   }
-
-  private static class FileTypesInputFilter implements FileBasedIndex.InputFilter {
-    private final Set<FileType> myAcceptedTypes;
-
-    public FileTypesInputFilter(Set<FileType> acceptedTypes) {
-      myAcceptedTypes = acceptedTypes;
-    }
-
-    @Override
-    public boolean acceptInput(VirtualFile file) {
-      return myAcceptedTypes.contains(file.getFileType());
-    }
-  }
 }

platform/lang-impl/src/com/intellij/psi/impl/cache/impl/todo/TodoIndex.java

@@ -118,10 +118,7 @@ public class TodoIndex extends FileBasedIndexExtension<TodoIndexEntry, Integer>
       }
 
       final FileType fileType = file.getFileType();
-      if (ProjectCoreUtil.isProjectOrWorkspaceFile(file, fileType)) {
-        return false;
-      }
-      
+
       if (fileType instanceof LanguageFileType) {
         final Language lang = ((LanguageFileType)fileType).getLanguage();
         final ParserDefinition parserDef = LanguageParserDefinitions.INSTANCE.forLanguage(lang);

platform/lang-impl/src/com/intellij/psi/impl/include/FileIncludeIndex.java

@@ -17,9 +17,11 @@
 package com.intellij.psi.impl.include;
 
 import com.intellij.openapi.extensions.Extensions;
+import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.vfs.JarFileSystem;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.util.Consumer;
 import com.intellij.util.containers.FactoryMap;
 import com.intellij.util.containers.MultiMap;
 import com.intellij.util.indexing.*;
@@ -160,7 +162,7 @@ public class FileIncludeIndex extends FileBasedIndexExtension<FileIncludeIndex.K
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return new FileBasedIndex.InputFilter() {
+    return new FileBasedIndex.FileTypeSpecificInputFilter() {
       @Override
       public boolean acceptInput(VirtualFile file) {
         if (file.getFileSystem() == JarFileSystem.getInstance()) {
@@ -173,6 +175,13 @@ public class FileIncludeIndex extends FileBasedIndexExtension<FileIncludeIndex.K
         }
         return false;
       }
+
+      @Override
+      public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
+        for (FileIncludeProvider provider : myProviders) {
+          provider.registerFileTypesUsedForIndexing(fileTypeSink);
+        }
+      }
     };
   }
 

platform/lang-impl/src/com/intellij/psi/impl/include/FileIncludeProvider.java

@@ -17,7 +17,9 @@
 package com.intellij.psi.impl.include;
 
 import com.intellij.openapi.extensions.ExtensionPointName;
+import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.Consumer;
 import com.intellij.util.indexing.FileContent;
 import org.jetbrains.annotations.NotNull;
 
@@ -32,7 +34,9 @@ public abstract class FileIncludeProvider {
   public abstract String getId();
 
   public abstract boolean acceptFile(VirtualFile file);
-  
+
+  public abstract void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink);
+
   @NotNull
   public abstract FileIncludeInfo[] getIncludeInfos(FileContent content);
 }

plugins/ant/src/com/intellij/lang/ant/AntImportsIndex.java

@@ -15,8 +15,7 @@
  */
 package com.intellij.lang.ant;
 
-import com.intellij.ide.highlighter.XmlFileType;
-import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.util.indexing.*;
 import com.intellij.util.io.EnumeratorIntegerDescriptor;
 import com.intellij.util.io.KeyDescriptor;
@@ -81,12 +80,6 @@ public class AntImportsIndex extends ScalarIndexExtension<Integer>{
       return map;
     }
   };
-  private static final FileBasedIndex.InputFilter INPUT_FILTER = new FileBasedIndex.InputFilter() {
-    @Override
-    public boolean acceptInput(final VirtualFile file) {
-      return file.getFileType() instanceof XmlFileType;
-    }
-  };
 
   @Override
   public int getVersion() {
@@ -112,7 +105,7 @@ public class AntImportsIndex extends ScalarIndexExtension<Integer>{
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return INPUT_FILTER;
+    return new DefaultFileTypeSpecificInputFilter(StdFileTypes.XML);
   }
 
   @Override

plugins/groovy/src/org/jetbrains/plugins/groovy/dsl/GroovyDslFileIndex.java

@@ -58,6 +58,7 @@ import com.intellij.util.io.KeyDescriptor;
 import org.jetbrains.annotations.NonNls;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.jetbrains.plugins.groovy.GroovyFileType;
 import org.jetbrains.plugins.groovy.annotator.GroovyFrameworkConfigNotification;
 import org.jetbrains.plugins.groovy.lang.psi.GroovyFile;
 import org.jetbrains.plugins.groovy.lang.psi.api.statements.blocks.GrClosableBlock;
@@ -92,7 +93,6 @@ public class GroovyDslFileIndex extends ScalarIndexExtension<String> {
   public static final NotificationGroup NOTIFICATION_GROUP =
     new NotificationGroup("Groovy DSL errors", NotificationDisplayType.BALLOON, true);
   private final MyDataIndexer myDataIndexer = new MyDataIndexer();
-  private final MyInputFilter myInputFilter = new MyInputFilter();
 
   private static final MultiMap<String, LinkedBlockingQueue<Pair<VirtualFile, GroovyDslExecutor>>> filesInProcessing =
     new ConcurrentMultiMap<String, LinkedBlockingQueue<Pair<VirtualFile, GroovyDslExecutor>>>();
@@ -144,7 +144,7 @@ public class GroovyDslFileIndex extends ScalarIndexExtension<String> {
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return myInputFilter;
+    return new MyInputFilter();
   }
 
   @Override
@@ -511,7 +511,11 @@ public class GroovyDslFileIndex extends ScalarIndexExtension<String> {
     }
   }
 
-  private static class MyInputFilter implements FileBasedIndex.InputFilter {
+  private static class MyInputFilter extends DefaultFileTypeSpecificInputFilter {
+    MyInputFilter() {
+      super(GroovyFileType.GROOVY_FILE_TYPE);
+    }
+
     @Override
     public boolean acceptInput(final VirtualFile file) {
       return "gdsl".equals(file.getExtension());

plugins/javaFX/src/org/jetbrains/plugins/javaFX/JavaFxControllerClassIndex.java

@@ -16,6 +16,7 @@
 package org.jetbrains.plugins.javaFX;
 
 import com.intellij.openapi.application.ApplicationManager;
+import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.openapi.project.IndexNotReadyException;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Computable;
@@ -127,7 +128,10 @@ public class JavaFxControllerClassIndex extends ScalarIndexExtension<String> {
     }
   }
 
-  static class MyInputFilter implements FileBasedIndex.InputFilter {
+  public static class MyInputFilter extends DefaultFileTypeSpecificInputFilter {
+    public MyInputFilter() {
+      super(StdFileTypes.XML);
+    }
     @Override
     public boolean acceptInput(final VirtualFile file) {
       return JavaFxFileTypeFactory.isFxml(file);

plugins/properties/src/com/intellij/lang/properties/xml/XmlPropertiesIndex.java

@@ -1,9 +1,11 @@
 package com.intellij.lang.properties.xml;
 
 import com.intellij.ide.highlighter.XmlFileType;
+import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.util.Comparing;
 import com.intellij.openapi.util.io.StreamUtil;
 import com.intellij.openapi.vfs.VirtualFile;
+import com.intellij.util.Consumer;
 import com.intellij.util.indexing.*;
 import com.intellij.util.io.*;
 import com.intellij.util.text.CharArrayUtil;
@@ -22,7 +24,7 @@ import java.util.Map;
  *         Date: 7/25/11
  */
 public class XmlPropertiesIndex extends FileBasedIndexExtension<XmlPropertiesIndex.Key, String>
-  implements FileBasedIndex.InputFilter, DataIndexer<XmlPropertiesIndex.Key, String, FileContent>,
+  implements FileBasedIndex.FileTypeSpecificInputFilter, DataIndexer<XmlPropertiesIndex.Key, String, FileContent>,
              KeyDescriptor<XmlPropertiesIndex.Key> {
 
   public final static Key MARKER_KEY = new Key();
@@ -69,7 +71,12 @@ public class XmlPropertiesIndex extends FileBasedIndexExtension<XmlPropertiesInd
 
   @Override
   public boolean acceptInput(VirtualFile file) {
-    return XmlFileType.INSTANCE == file.getFileType();
+    return true;
+  }
+
+  @Override
+  public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
+    fileTypeSink.consume(XmlFileType.INSTANCE);
   }
 
   @NotNull

plugins/ui-designer/src/com/intellij/uiDesigner/binding/FormClassIndex.java

@@ -41,7 +41,6 @@ import java.util.*;
 public class FormClassIndex extends ScalarIndexExtension<String> {
   @NonNls public static final ID<String, Void> NAME = ID.create("FormClassIndex");
   private final EnumeratorStringDescriptor myKeyDescriptor = new EnumeratorStringDescriptor();
-  private final MyInputFilter myInputFilter = new MyInputFilter();
   private final MyDataIndexer myDataIndexer = new MyDataIndexer();
 
   @Override
@@ -63,7 +62,7 @@ public class FormClassIndex extends ScalarIndexExtension<String> {
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return myInputFilter;
+    return new DefaultFileTypeSpecificInputFilter(StdFileTypes.GUI_DESIGNER_FORM);
   }
 
   @Override
@@ -94,13 +93,6 @@ public class FormClassIndex extends ScalarIndexExtension<String> {
     }
   }
 
-  private static class MyInputFilter implements FileBasedIndex.InputFilter {
-    @Override
-    public boolean acceptInput(final VirtualFile file) {
-      return file.getFileType() == StdFileTypes.GUI_DESIGNER_FORM;
-    }
-  }
-
   public static List<PsiFile> findFormsBoundToClass(Project project, String className) {
     return findFormsBoundToClass(project, className, ProjectScope.getAllScope(project));
   }

plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltIncludeProvider.java

@@ -17,9 +17,11 @@
 package org.intellij.lang.xpath.xslt.impl;
 
 import com.intellij.ide.highlighter.XmlFileType;
+import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.impl.include.FileIncludeInfo;
 import com.intellij.psi.impl.include.FileIncludeProvider;
+import com.intellij.util.Consumer;
 import com.intellij.util.indexing.FileContent;
 import com.intellij.util.text.CharArrayUtil;
 import com.intellij.util.xml.NanoXmlUtil;
@@ -41,6 +43,11 @@ public class XsltIncludeProvider extends FileIncludeProvider {
     return file.getFileType() == XmlFileType.INSTANCE;
   }
 
+  @Override
+  public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
+    fileTypeSink.consume(XmlFileType.INSTANCE);
+  }
+
   @NotNull
   public FileIncludeInfo[] getIncludeInfos(FileContent content) {
     CharSequence contentAsText = content.getContentAsText();

plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltSymbolIndex.java

@@ -144,13 +144,10 @@ public class XsltSymbolIndex extends FileBasedIndexExtension<String, XsltSymbolI
 
     @Override
     public FileBasedIndex.InputFilter getInputFilter() {
-        return new FileBasedIndex.InputFilter() {
+        return new DefaultFileTypeSpecificInputFilter(StdFileTypes.XML) {
             @Override
             public boolean acceptInput(VirtualFile file) {
-                if (file.getFileSystem() instanceof JarFileSystem) {
-                  return false; // there is lots and lots of custom XML inside zip files
-                }
-                return file.getFileType() == StdFileTypes.XML;
+                return !(file.getFileSystem() instanceof JarFileSystem);
             }
         };
     }

xml/dom-impl/src/com/intellij/util/xml/DomFileIndex.java

@@ -17,7 +17,6 @@ package com.intellij.util.xml;
 
 import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.openapi.util.text.StringUtil;
-import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.indexing.*;
 import com.intellij.util.io.EnumeratorStringDescriptor;
@@ -38,12 +37,6 @@ import java.util.Set;
  */
 public class DomFileIndex extends ScalarIndexExtension<String>{
   public static final ID<String,Void> NAME = ID.create("DomFileIndex");
-  private static final FileBasedIndex.InputFilter INPUT_FILTER = new FileBasedIndex.InputFilter() {
-    @Override
-    public boolean acceptInput(final VirtualFile file) {
-      return file.getFileType() == StdFileTypes.XML;
-    }
-  };
   private final DataIndexer<String,Void, FileContent> myDataIndexer;
 
   public DomFileIndex() {
@@ -98,7 +91,7 @@ public class DomFileIndex extends ScalarIndexExtension<String>{
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return INPUT_FILTER;
+    return new DefaultFileTypeSpecificInputFilter(StdFileTypes.XML);
   }
 
   @Override

xml/impl/src/com/intellij/html/index/Html5CustomAttributesIndex.java

@@ -21,7 +21,6 @@ import com.intellij.lang.xhtml.XHTMLLanguage;
 import com.intellij.lexer.HtmlHighlightingLexer;
 import com.intellij.lexer.Lexer;
 import com.intellij.lexer.XHtmlHighlightingLexer;
-import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.fileTypes.LanguageFileType;
 import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.openapi.vfs.LocalFileSystem;
@@ -76,18 +75,6 @@ public class Html5CustomAttributesIndex extends ScalarIndexExtension<String> {
     }
   };
 
-  private final FileBasedIndex.InputFilter myInputFilter = new FileBasedIndex.InputFilter() {
-    @Override
-    public boolean acceptInput(final VirtualFile file) {
-      if (file.getFileSystem() != LocalFileSystem.getInstance() && !(file.getFileSystem() instanceof TempFileSystem)) {
-        return false;
-      }
-
-      final FileType fileType = file.getFileType();
-      return fileType == StdFileTypes.HTML || fileType == StdFileTypes.XHTML;
-    }
-  };
-
   @NotNull
   @Override
   public ID<String, Void> getName() {
@@ -107,7 +94,16 @@ public class Html5CustomAttributesIndex extends ScalarIndexExtension<String> {
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return myInputFilter;
+    return new DefaultFileTypeSpecificInputFilter(StdFileTypes.HTML, StdFileTypes.XHTML) {
+      @Override
+      public boolean acceptInput(final VirtualFile file) {
+        if (file.getFileSystem() != LocalFileSystem.getInstance() && !(file.getFileSystem() instanceof TempFileSystem)) {
+          return false;
+        }
+
+        return true;
+      }
+    };
   }
 
   @Override

xml/impl/src/com/intellij/xml/index/XmlIndex.java

@@ -26,6 +26,7 @@ import com.intellij.openapi.roots.ProjectRootManager;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.openapi.vfs.VirtualFileFilter;
 import com.intellij.psi.search.GlobalSearchScope;
+import com.intellij.util.indexing.DefaultFileTypeSpecificInputFilter;
 import com.intellij.util.indexing.FileBasedIndex;
 import com.intellij.util.indexing.FileBasedIndexExtension;
 import com.intellij.util.io.EnumeratorStringDescriptor;
@@ -41,15 +42,6 @@ public abstract class XmlIndex<V> extends FileBasedIndexExtension<String, V> {
 
   protected static final EnumeratorStringDescriptor KEY_DESCRIPTOR = new EnumeratorStringDescriptor();
 
-  private static final FileBasedIndex.InputFilter INPUT_FILTER = new FileBasedIndex.InputFilter() {
-    public boolean acceptInput(final VirtualFile file) {
-      FileType fileType = file.getFileType();
-      final String extension = file.getExtension();
-      return XmlFileType.INSTANCE.equals(fileType) && "xsd".equals(extension) ||
-             DTDFileType.INSTANCE.equals(fileType) && "dtd".equals(extension);
-    }
-  };
-
   protected static GlobalSearchScope createFilter(final Project project) {
     final GlobalSearchScope projectScope = GlobalSearchScope.allScope(project);
     return new GlobalSearchScope(project) {
@@ -108,7 +100,14 @@ public abstract class XmlIndex<V> extends FileBasedIndexExtension<String, V> {
   }
 
   public FileBasedIndex.InputFilter getInputFilter() {
-    return INPUT_FILTER;
+    return new DefaultFileTypeSpecificInputFilter(XmlFileType.INSTANCE, DTDFileType.INSTANCE) {
+      public boolean acceptInput(final VirtualFile file) {
+        FileType fileType = file.getFileType();
+        final String extension = file.getExtension();
+        return XmlFileType.INSTANCE.equals(fileType) && "xsd".equals(extension) ||
+               DTDFileType.INSTANCE.equals(fileType) && "dtd".equals(extension);
+      }
+    };
   }
 
   public boolean dependsOnFileContent() {

xml/impl/src/com/intellij/xml/util/XIncludeProvider.java

@@ -17,10 +17,10 @@ package com.intellij.xml.util;
 
 import com.intellij.ide.highlighter.XmlFileType;
 import com.intellij.openapi.fileTypes.FileType;
-import com.intellij.openapi.project.ProjectCoreUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.impl.include.FileIncludeInfo;
 import com.intellij.psi.impl.include.FileIncludeProvider;
+import com.intellij.util.Consumer;
 import com.intellij.util.indexing.FileContent;
 import com.intellij.util.text.CharArrayUtil;
 import com.intellij.util.xml.NanoXmlUtil;
@@ -40,8 +40,12 @@ public class XIncludeProvider extends FileIncludeProvider {
 
   @Override
   public boolean acceptFile(VirtualFile file) {
-    final FileType fileType = file.getFileType();
-    return fileType == XmlFileType.INSTANCE && !ProjectCoreUtil.isProjectOrWorkspaceFile(file, fileType);
+    return file.getFileType() == XmlFileType.INSTANCE;
+  }
+
+  @Override
+  public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
+    fileTypeSink.consume(XmlFileType.INSTANCE);
   }
 
   @NotNull

xml/relaxng/src/org/intellij/plugins/relaxNG/model/resolve/RelaxIncludeProvider.java

@@ -5,6 +5,7 @@ import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.impl.include.FileIncludeInfo;
 import com.intellij.psi.impl.include.FileIncludeProvider;
+import com.intellij.util.Consumer;
 import com.intellij.util.indexing.FileContent;
 import com.intellij.util.text.CharArrayUtil;
 import com.intellij.util.xml.NanoXmlUtil;
@@ -35,6 +36,12 @@ public class RelaxIncludeProvider extends FileIncludeProvider {
     return type == XmlFileType.INSTANCE || type == RncFileType.getInstance();
   }
 
+  @Override
+  public void registerFileTypesUsedForIndexing(@NotNull Consumer<FileType> fileTypeSink) {
+    fileTypeSink.consume(XmlFileType.INSTANCE);
+    fileTypeSink.consume(RncFileType.getInstance());
+  }
+
   @NotNull
   @Override
   public FileIncludeInfo[] getIncludeInfos(FileContent content) {

xml/relaxng/src/org/intellij/plugins/relaxNG/model/resolve/RelaxSymbolIndex.java

@@ -6,7 +6,6 @@ import com.intellij.navigation.ItemPresentation;
 import com.intellij.navigation.NavigationItem;
 import com.intellij.navigation.PsiElementNavigationItem;
 import com.intellij.openapi.editor.colors.TextAttributesKey;
-import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.fileTypes.StdFileTypes;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.vfs.JarFileSystem;
@@ -72,7 +71,7 @@ public class RelaxSymbolIndex extends ScalarIndexExtension<String> {
         final HashMap<String, Void> map = new HashMap<String, Void>();
         if (inputData.getFileType() == XmlFileType.INSTANCE) {
           CharSequence inputDataContentAsText = inputData.getContentAsText();
-          if (CharArrayUtil.indexOf(inputDataContentAsText, ApplicationLoader.RNG_NAMESPACE, 0) == -1) return Collections.EMPTY_MAP;
+          if (CharArrayUtil.indexOf(inputDataContentAsText, ApplicationLoader.RNG_NAMESPACE, 0) == -1) return Collections.emptyMap();
           NanoXmlUtil.parse(CharArrayUtil.readerFromCharSequence(inputData.getContentAsText()), new NanoXmlUtil.IXMLBuilderAdapter() {
             NanoXmlUtil.IXMLBuilderAdapter attributeHandler;
             int depth;
@@ -137,14 +136,10 @@ public class RelaxSymbolIndex extends ScalarIndexExtension<String> {
 
   @Override
   public FileBasedIndex.InputFilter getInputFilter() {
-    return new FileBasedIndex.InputFilter() {
+    return new DefaultFileTypeSpecificInputFilter(StdFileTypes.XML, RncFileType.getInstance()) {
       @Override
       public boolean acceptInput(VirtualFile file) {
-        if (file.getFileSystem() instanceof JarFileSystem) {
-          return false; // there is lots and lots of custom XML inside zip files
-        }
-        final FileType fileType = file.getFileType();
-        return fileType == StdFileTypes.XML || fileType == RncFileType.getInstance();
+        return !(file.getFileSystem() instanceof JarFileSystem);
       }
     };
   }
@@ -243,7 +238,7 @@ public class RelaxSymbolIndex extends ScalarIndexExtension<String> {
 
     @Override
     public ItemPresentation getPresentation() {
-      return myPresentation != null ? this : null;
+      return this;
     }
 
     @Override