layout/style/CSSPropFlags.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef mozilla_CSSPropFlags_h
   8 #define mozilla_CSSPropFlags_h
   9
  10 #include "mozilla/TypedEnumBits.h"
  11
  12 namespace mozilla {
  13
  14 enum class CSSPropFlags : uint16_t {
  15   // This property is not parsed. It is only there for internal use like
  16   // attribute mapping.
  17   Inaccessible = 1 << 0,
  18
  19   // The following two flags along with the pref defines where the this
  20   // property can be used:
  21   // * If none of the two flags is presented, the pref completely controls
  22   //   the availability of this property. And in that case, if it has no
  23   //   pref, this property is usable everywhere.
  24   // * If any of the flags is set, this property is always enabled in the
  25   //   specific contexts regardless of the value of the pref. If there is
  26   //   no pref for this property at all in this case, it is an internal-
  27   //   only property, which cannot be used anywhere else, and should be
  28   //   wrapped in "#ifndef CSS_PROP_LIST_EXCLUDE_INTERNAL".
  29   // Note that, these flags have no effect on the use of aliases of this
  30   // property.
  31   // Furthermore, for the purposes of animation (including triggering
  32   // transitions) these flags are ignored. That is, if the property is disabled
  33   // by a pref, we will *not* run animations or transitions on it even in
  34   // UA sheets or chrome.
  35   EnabledInUASheets = 1 << 1,
  36   EnabledInChrome = 1 << 2,
  37   EnabledInUASheetsAndChrome = EnabledInUASheets | EnabledInChrome,
  38   EnabledMask = EnabledInUASheetsAndChrome,
  39
  40   // This property can be animated on the compositor.
  41   CanAnimateOnCompositor = 1 << 3,
  42
  43   // This property is an internal property that is not represented in
  44   // the DOM. Properties with this flag are defined in an #ifndef
  45   // CSS_PROP_LIST_EXCLUDE_INTERNAL section.
  46   Internal = 1 << 4,
  47
  48   // Whether this property should be serialized by Servo in getComputedStyle.
  49   SerializedByServo = 1 << 5,
  50
  51   // Whether this is a logical property.
  52   IsLogical = 1 << 6,
  53
  54   // Whether this property, when changed, may affect layout, overflow, or paint.
  55   AffectsLayout = 1 << 7,
  56   AffectsOverflow = 1 << 8,
  57   AffectsPaint = 1 << 9,
  58 };
  59
  60 MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(CSSPropFlags)
  61
  62 }  // namespace mozilla
  63
  64 #endif  // mozilla_CSSPropFlags_h