93 lines
3.2 KiB
C++
93 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* atom list for CSS pseudo-classes */
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#ifndef nsCSSPseudoClasses_h___
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#define nsCSSPseudoClasses_h___
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#include "nsStringFwd.h"
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#include "mozilla/CSSEnabledState.h"
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#include "nsStyleStruct.h"
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// The following two flags along with the pref defines where this pseudo
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// class can be used:
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// * If none of the two flags is presented, the pref completely controls
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// the availability of this pseudo class. And in that case, if it has
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// no pref, this property is usable everywhere.
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// * If any of the flags is set, this pseudo class is always enabled in
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// the specific contexts regardless of the value of the pref. If there
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// is no pref for this pseudo class at all in this case, it is an
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// internal-only pseudo class, which cannot be used anywhere else.
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#define CSS_PSEUDO_CLASS_ENABLED_MASK (3<<0)
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#define CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS (1<<0)
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#define CSS_PSEUDO_CLASS_ENABLED_IN_CHROME (1<<1)
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#define CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS_AND_CHROME \
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(CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS | CSS_PSEUDO_CLASS_ENABLED_IN_CHROME)
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class nsIAtom;
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namespace mozilla {
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// The total count of CSSPseudoClassType is less than 256,
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// so use uint8_t as its underlying type.
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typedef uint8_t CSSPseudoClassTypeBase;
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enum class CSSPseudoClassType : CSSPseudoClassTypeBase
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{
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#define CSS_PSEUDO_CLASS(_name, _value, _flags, _pref) \
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_name,
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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Count,
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NotPseudo, // This value MUST be second last! SelectorMatches depends on it.
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MAX
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};
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} // namespace mozilla
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class nsCSSPseudoClasses
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{
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typedef mozilla::CSSPseudoClassType Type;
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typedef mozilla::CSSEnabledState EnabledState;
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public:
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static void AddRefAtoms();
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static Type GetPseudoType(nsIAtom* aAtom, EnabledState aEnabledState);
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static bool HasStringArg(Type aType);
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static bool HasNthPairArg(Type aType);
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static bool HasSelectorListArg(Type aType) {
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return aType == Type::any;
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}
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static bool IsUserActionPseudoClass(Type aType);
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// Should only be used on types other than Count and NotPseudoClass
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static void PseudoTypeToString(Type aType, nsAString& aString);
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static bool IsEnabled(Type aType, EnabledState aEnabledState)
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{
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auto index = static_cast<size_t>(aType);
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MOZ_ASSERT(index < static_cast<size_t>(Type::Count));
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if (sPseudoClassEnabled[index] ||
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aEnabledState == EnabledState::eIgnoreEnabledState) {
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return true;
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}
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auto flags = kPseudoClassFlags[index];
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if (((aEnabledState & EnabledState::eInChrome) &&
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(flags & CSS_PSEUDO_CLASS_ENABLED_IN_CHROME)) ||
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((aEnabledState & EnabledState::eInUASheets) &&
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(flags & CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS))) {
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return true;
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}
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return false;
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}
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private:
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static const uint32_t kPseudoClassFlags[size_t(Type::Count)];
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static bool sPseudoClassEnabled[size_t(Type::Count)];
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};
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#endif /* nsCSSPseudoClasses_h___ */
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