layout/style/nsCSSAnonBoxes.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 /* atom list for CSS anonymous boxes */
   8
   9 #ifndef nsCSSAnonBoxes_h___
  10 #define nsCSSAnonBoxes_h___
  11
  12 #include "nsAtom.h"
  13 #include "nsGkAtoms.h"
  14 #include "mozilla/PseudoStyleType.h"
  15
  16 class nsCSSAnonBoxes {
  17   using PseudoStyleType = mozilla::PseudoStyleType;
  18   using PseudoStyle = mozilla::PseudoStyle;
  19
  20  public:
  21   static bool IsTreePseudoElement(nsAtom* aPseudo);
  22   static bool IsNonElement(PseudoStyleType aPseudo) {
  23     return aPseudo == PseudoStyleType::mozText ||
  24            aPseudo == PseudoStyleType::oofPlaceholder ||
  25            aPseudo == PseudoStyleType::firstLetterContinuation;
  26   }
  27
  28   enum class NonInheriting : uint8_t {
  29 #define CSS_ANON_BOX(_name, _value) /* nothing */
  30 #define CSS_NON_INHERITING_ANON_BOX(_name, _value) _name,
  31 #include "nsCSSAnonBoxList.h"
  32 #undef CSS_NON_INHERITING_ANON_BOX
  33 #undef CSS_ANON_BOX
  34     _Count
  35   };
  36
  37   // Get the NonInheriting type for a given pseudo tag.  The pseudo tag must
  38   // test true for IsNonInheritingAnonBox.
  39   static NonInheriting NonInheritingTypeForPseudoType(PseudoStyleType aType) {
  40     MOZ_ASSERT(PseudoStyle::IsNonInheritingAnonBox(aType));
  41     static_assert(sizeof(PseudoStyleType) == sizeof(uint8_t), "");
  42     return static_cast<NonInheriting>(
  43         static_cast<uint8_t>(aType) -
  44         static_cast<uint8_t>(PseudoStyleType::NonInheritingAnonBoxesStart));
  45   }
  46
  47 #ifdef DEBUG
  48   static nsStaticAtom* GetAtomBase();
  49   static void AssertAtoms();
  50 #endif
  51
  52 // Alias nsCSSAnonBoxes::foo() to nsGkAtoms::AnonBox_foo.
  53 #define CSS_ANON_BOX(name_, value_)                       \
  54   static nsCSSAnonBoxPseudoStaticAtom* name_() {          \
  55     return const_cast<nsCSSAnonBoxPseudoStaticAtom*>(     \
  56         static_cast<const nsCSSAnonBoxPseudoStaticAtom*>( \
  57             nsGkAtoms::AnonBox_##name_));                 \
  58   }
  59 #include "nsCSSAnonBoxList.h"
  60 #undef CSS_ANON_BOX
  61 };
  62
  63 #endif /* nsCSSAnonBoxes_h___ */