layout/style/PseudoStyleType.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_PseudoStyleType_h
   8 #define mozilla_PseudoStyleType_h
   9
  10 #include <cstddef>
  11 #include <cstdint>
  12 #include <iosfwd>
  13
  14 namespace mozilla {
  15
  16 // The kind of pseudo-style that we have. This can be:
  17 //
  18 //  * CSS pseudo-elements (see nsCSSPseudoElements.h).
  19 //  * Anonymous boxes (see nsCSSAnonBoxes.h).
  20 //  * XUL tree pseudo-element stuff.
  21 //
  22 // This roughly corresponds to the `PseudoElement` enum in Rust code.
  23 enum class PseudoStyleType : uint8_t {
  24 // If CSS pseudo-elements stop being first here, change GetPseudoType.
  25 #define CSS_PSEUDO_ELEMENT(_name, _value, _flags) _name,
  26 #include "nsCSSPseudoElementList.h"
  27 #undef CSS_PSEUDO_ELEMENT
  28   CSSPseudoElementsEnd,
  29   AnonBoxesStart = CSSPseudoElementsEnd,
  30   InheritingAnonBoxesStart = CSSPseudoElementsEnd,
  31
  32   // Dummy variant so the next variant also has the same discriminant as
  33   // AnonBoxesStart.
  34   __reset_1 = AnonBoxesStart - 1,
  35
  36 #define CSS_ANON_BOX(_name, _str) _name,
  37 #define CSS_NON_INHERITING_ANON_BOX(_name, _str)
  38 #define CSS_WRAPPER_ANON_BOX(_name, _str)
  39 #include "nsCSSAnonBoxList.h"
  40 #undef CSS_ANON_BOX
  41 #undef CSS_WRAPPER_ANON_BOX
  42 #undef CSS_NON_INHERITING_ANON_BOX
  43
  44   // Wrapper anon boxes are inheriting anon boxes.
  45   WrapperAnonBoxesStart,
  46
  47   // Dummy variant so the next variant also has the same discriminant as
  48   // WrapperAnonBoxesStart.
  49   __reset_2 = WrapperAnonBoxesStart - 1,
  50
  51 #define CSS_ANON_BOX(_name, _str)
  52 #define CSS_NON_INHERITING_ANON_BOX(_name, _str)
  53 #define CSS_WRAPPER_ANON_BOX(_name, _str) _name,
  54 #include "nsCSSAnonBoxList.h"
  55 #undef CSS_ANON_BOX
  56 #undef CSS_WRAPPER_ANON_BOX
  57 #undef CSS_NON_INHERITING_ANON_BOX
  58
  59   WrapperAnonBoxesEnd,
  60   InheritingAnonBoxesEnd = WrapperAnonBoxesEnd,
  61   NonInheritingAnonBoxesStart = WrapperAnonBoxesEnd,
  62
  63   __reset_3 = NonInheritingAnonBoxesStart - 1,
  64
  65 #define CSS_ANON_BOX(_name, _str)
  66 #define CSS_NON_INHERITING_ANON_BOX(_name, _str) _name,
  67 #include "nsCSSAnonBoxList.h"
  68 #undef CSS_ANON_BOX
  69 #undef CSS_NON_INHERITING_ANON_BOX
  70
  71   NonInheritingAnonBoxesEnd,
  72   AnonBoxesEnd = NonInheritingAnonBoxesEnd,
  73
  74   XULTree = AnonBoxesEnd,
  75   NotPseudo,
  76   MAX
  77 };
  78
  79 std::ostream& operator<<(std::ostream&, PseudoStyleType);
  80
  81 class PseudoStyle final {
  82  public:
  83   using Type = PseudoStyleType;
  84
  85   // This must match EAGER_PSEUDO_COUNT in Rust code.
  86   static const size_t kEagerPseudoCount = 4;
  87
  88   static bool IsPseudoElement(Type aType) {
  89     return aType < Type::CSSPseudoElementsEnd;
  90   }
  91
  92   static bool IsAnonBox(Type aType) {
  93     return aType >= Type::AnonBoxesStart && aType < Type::AnonBoxesEnd;
  94   }
  95
  96   static bool IsInheritingAnonBox(Type aType) {
  97     return aType >= Type::InheritingAnonBoxesStart &&
  98            aType < Type::InheritingAnonBoxesEnd;
  99   }
 100
 101   static bool IsNonInheritingAnonBox(Type aType) {
 102     return aType >= Type::NonInheritingAnonBoxesStart &&
 103            aType < Type::NonInheritingAnonBoxesEnd;
 104   }
 105
 106   static bool IsWrapperAnonBox(Type aType) {
 107     return aType >= Type::WrapperAnonBoxesStart &&
 108            aType < Type::WrapperAnonBoxesEnd;
 109   }
 110 };
 111
 112 }  // namespace mozilla
 113
 114 #endif