Move "word" granularity related functions to VisibleUnitWord.cpp

third_party/WebKit/Source/core/editing/VisibleUnits.h

 /*
  * Copyright (C) 2004 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 323 matching lines @@
 CORE_EXPORT bool RendersInDifferentPosition(const Position&, const Position&);
 
 CORE_EXPORT Position SkipWhitespace(const Position&);
 CORE_EXPORT PositionInFlatTree SkipWhitespace(const PositionInFlatTree&);
 
 CORE_EXPORT IntRect ComputeTextRect(const EphemeralRange&);
 IntRect ComputeTextRect(const EphemeralRangeInFlatTree&);
 FloatRect ComputeTextFloatRect(const EphemeralRange&);
 
 // Export below functions only for |VisibleUnit| family.
+enum BoundarySearchContextAvailability {
+  kDontHaveMoreContext,
+  kMayHaveMoreContext
+};
+
+typedef unsigned (*BoundarySearchFunction)(const UChar*,
+                                           unsigned length,
+                                           unsigned offset,
+                                           BoundarySearchContextAvailability,
+                                           bool& need_more_context);
+
+Position NextBoundary(const VisiblePosition&, BoundarySearchFunction);
+PositionInFlatTree NextBoundary(const VisiblePositionInFlatTree&,
+                                BoundarySearchFunction);
+Position PreviousBoundary(const VisiblePosition&, BoundarySearchFunction);
+PositionInFlatTree PreviousBoundary(const VisiblePositionInFlatTree&,
+                                    BoundarySearchFunction);
+
 PositionWithAffinity HonorEditingBoundaryAtOrBefore(const PositionWithAffinity&,
                                                     const Position&);
 
 PositionInFlatTreeWithAffinity HonorEditingBoundaryAtOrBefore(
     const PositionInFlatTreeWithAffinity&,
     const PositionInFlatTree&);
 
 VisiblePosition HonorEditingBoundaryAtOrAfter(const VisiblePosition&,
                                               const Position&);
 
 VisiblePositionInFlatTree HonorEditingBoundaryAtOrAfter(
     const VisiblePositionInFlatTree&,
     const PositionInFlatTree&);
 
 // Export below functions only for |SelectionModifier|.
 VisiblePosition HonorEditingBoundaryAtOrBefore(const VisiblePosition&,
                                                const Position&);
 
 Position NextRootInlineBoxCandidatePosition(Node*,
                                             const VisiblePosition&,
                                             EditableType);
 
 Position PreviousRootInlineBoxCandidatePosition(Node*,
                                                 const VisiblePosition&,
                                                 EditableType);
 
 }  // namespace blink
 
 #endif  // VisibleUnits_h