Implementation of CSS3 nav-up/down/left/right properties from CSS3 UI

third_party/WebKit/Source/core/style/ComputedStyleConstants.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 169 matching lines @@
 
 // CSS3 Background Values
 enum EFillSizeType { Contain, Cover, SizeLength, SizeNone };
 
 // CSS3 Background Position
 enum BackgroundEdgeOrigin { TopEdge, RightEdge, BottomEdge, LeftEdge };
 
 // CSS Mask Source Types
 enum EMaskSourceType { MaskAlpha, MaskLuminance };
 
+// CSS3 Directional Focus Navigation
+enum ENavigationTarget { Current = 0, Root = 1, TargetName = 2 };

[fs, 2016/05/18 15:55:05]

No need to specify values here. It might be worth considering making this an
enum class or otherwise add additional qualification to make these unique
(Current and Root feels like common enough.)

+
 // Deprecated Flexible Box Properties
 
 enum EBoxPack { Start, Center, End, Justify };
 enum EBoxAlignment { BSTRETCH, BSTART, BCENTER, BEND, BBASELINE };
 enum EBoxOrient { HORIZONTAL, VERTICAL };
 enum EBoxLines { SINGLE, MULTIPLE };
 enum EBoxDirection { BNORMAL, BREVERSE };
 
 // CSS3 Flexbox Properties
 
@@ skipping 407 matching lines @@
 
 enum AutoRepeatType {
     NoAutoRepeat,
     AutoFill,
     AutoFit
 };
 
 } // namespace blink
 
 #endif // ComputedStyleConstants_h