[MarkersIntersectingRange #2.1] Add DocumentMarkerController::FirstMarkerIntersectingOffsetRange()

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 76 matching lines @@
   bool SetTextMatchMarkersActive(Node*,
                                  unsigned start_offset,
                                  unsigned end_offset,
                                  bool);
   bool HasMarkers(Node* node) const { return markers_.Contains(node); }
 
   // Returns a marker of one of the specified types that includes the specified
   // Position in its interior (not at an endpoint), if one exists.
   DocumentMarker* MarkerAtPosition(const Position&,
                                    DocumentMarker::MarkerTypes);
+  // Looks for a marker in the specified node of the specified type whose
+  // interior has non-empty overlap with the range [start_offset, end_offset].
+  // If the range is collapsed, this looks for a marker containing the offset of
+  // the collapsed range in its interior.
+  // If such a marker exists, this method will return one of them (no guarantees
+  // are provided as to which one). Otherwise, this method will return null.
+  DocumentMarker* FirstMarkerIntersectingOffsetRange(
+      const Text&,
+      unsigned start_offset,
+      unsigned end_offset,
+      DocumentMarker::MarkerTypes);
   DocumentMarkerVector MarkersFor(
       Node*,
       DocumentMarker::MarkerTypes = DocumentMarker::AllMarkers());
   DocumentMarkerVector Markers();
   Vector<IntRect> LayoutRectsForTextMatchMarkers();
   void InvalidateRectsForAllTextMatchMarkers();
   void InvalidateRectsForTextMatchMarkersInNode(const Node&);
 
   DECLARE_TRACE();
 
@@ skipping 33 matching lines @@
   const Member<const Document> document_;
 };
 
 }  // namespace blink
 
 #ifndef NDEBUG
 void showDocumentMarkers(const blink::DocumentMarkerController*);
 #endif
 
 #endif  // DocumentMarkerController_h