Rewrite DocumentMarkerController to use SynchronousMutationObserver

third_party/WebKit/Source/core/editing/markers/DocumentMarkerController.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
@@ skipping 12 matching lines @@
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef DocumentMarkerController_h
 #define DocumentMarkerController_h
 
 #include "core/CoreExport.h"
+#include "core/dom/SynchronousMutationObserver.h"
 #include "core/editing/iterators/TextIterator.h"
 #include "core/editing/markers/DocumentMarker.h"
 #include "platform/geometry/IntRect.h"
 #include "platform/heap/Handle.h"
 #include "wtf/HashMap.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class Node;
 class RenderedDocumentMarker;
 class Text;
 
 class MarkerRemoverPredicate final {
  public:
   explicit MarkerRemoverPredicate(const Vector<String>& words);
   bool operator()(const DocumentMarker&, const Text&) const;
 
  private:
   Vector<String> m_words;
 };
 
 class CORE_EXPORT DocumentMarkerController final
-    : public GarbageCollected<DocumentMarkerController> {
+    : public GarbageCollected<DocumentMarkerController>,
+      public SynchronousMutationObserver {
   WTF_MAKE_NONCOPYABLE(DocumentMarkerController);
+  USING_GARBAGE_COLLECTED_MIXIN(DocumentMarkerController);
 
  public:
-  explicit DocumentMarkerController(const Document&);
+  explicit DocumentMarkerController(Document&);
 
   void clear();
   void addMarker(const Position& start,
                  const Position& end,
                  DocumentMarker::MarkerType,
                  const String& description = emptyString,
                  uint32_t hash = 0);
   void addTextMatchMarker(const EphemeralRange&, bool activeMatch);
   void addCompositionMarker(const Position& start,
                             const Position& end,
@@ skipping 28 matching lines @@
                          DoNotRemovePartiallyOverlappingMarker);
 
   void removeMarkers(
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
   void removeMarkers(
       Node*,
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
   void removeMarkers(const MarkerRemoverPredicate& shouldRemoveMarker);
   void repaintMarkers(
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
-  void shiftMarkers(Node*, unsigned startOffset, int delta);
   // Returns true if markers within a range are found.
   bool setMarkersActive(const EphemeralRange&, bool);
   // Returns true if markers within a range defined by a node, |startOffset| and
   // |endOffset| are found.
   bool setMarkersActive(Node*, unsigned startOffset, unsigned endOffset, bool);
   bool hasMarkers(Node* node) const { return m_markers.contains(node); }
 
   DocumentMarkerVector markersFor(
       Node*,
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
   DocumentMarkerVector markersInRange(const EphemeralRange&,
                                       DocumentMarker::MarkerTypes);
   DocumentMarkerVector markers();
   Vector<IntRect> renderedRectsForMarkers(DocumentMarker::MarkerType);
   void updateMarkerRenderedRectIfNeeded(const Node&, RenderedDocumentMarker&);
   void invalidateRectsForAllMarkers();
   void invalidateRectsForMarkersInNode(const Node&);
 
   DECLARE_TRACE();
 
 #ifndef NDEBUG
   void showMarkers() const;
 #endif
 
+  // SynchronousMutationObserver
+  void didUpdateCharacterData(CharacterData*,
+                              unsigned offset,
+                              unsigned oldLength,
+                              unsigned newLength) override;
+
  private:
   void addMarker(Node*, const DocumentMarker&);
 
   using MarkerList = HeapVector<Member<RenderedDocumentMarker>>;
   using MarkerLists =
       HeapVector<Member<MarkerList>, DocumentMarker::MarkerTypeIndexesCount>;
   using MarkerMap = HeapHashMap<WeakMember<const Node>, Member<MarkerLists>>;
   void mergeOverlapping(MarkerList*, RenderedDocumentMarker*);
   bool possiblyHasMarkers(DocumentMarker::MarkerTypes);
   void removeMarkersFromList(MarkerMap::iterator, DocumentMarker::MarkerTypes);
   void removeMarkers(TextIterator&,
                      DocumentMarker::MarkerTypes,
                      RemovePartiallyOverlappingMarkerOrNot);
+  void removeZeroLengthMarkers();

[Xiaocheng, 2017/02/23 18:58:35]

This should be removed.

 
   MarkerMap m_markers;
   // Provide a quick way to determine whether a particular marker type is absent
   // without going through the map.
   DocumentMarker::MarkerTypes m_possiblyExistingMarkerTypes;
   const Member<const Document> m_document;
 };
 
 }  // namespace blink
 
 #ifndef NDEBUG
 void showDocumentMarkers(const blink::DocumentMarkerController*);
 #endif
 
 #endif  // DocumentMarkerController_h