133 lines
4.3 KiB
C++
133 lines
4.3 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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#include "mozilla/ArrayUtils.h"
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#include "nsCSSPseudoClasses.h"
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#include "nsStaticAtom.h"
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#include "mozilla/Preferences.h"
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#include "nsString.h"
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using namespace mozilla;
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using namespace mozilla::css;
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// define storage for all atoms
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#define CSS_PSEUDO_CLASS(_name, _value, _flags, _pref) \
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static nsIAtom* sPseudoClass_##_name;
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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NS_STATIC_ATOM_BUFFER(name_##_pseudo_class_buffer, value_)
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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static_assert(!((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_CHROME) || \
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((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS), \
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"Pseudo-class '" #name_ "' is enabled in chrome, so it " \
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"should also be enabled in UA sheets");
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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// Array of nsStaticAtom for each of the pseudo-classes.
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static const nsStaticAtom CSSPseudoClasses_info[] = {
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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NS_STATIC_ATOM(name_##_pseudo_class_buffer, &sPseudoClass_##name_),
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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};
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// Flags data for each of the pseudo-classes, which must be separate
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// from the previous array since there's no place for it in
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// nsStaticAtom.
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/* static */ const uint32_t
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nsCSSPseudoClasses::kPseudoClassFlags[] = {
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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flags_,
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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};
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/* static */ bool
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nsCSSPseudoClasses::sPseudoClassEnabled[] = {
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// If the pseudo class has any "ENABLED_IN" flag set, it is disabled by
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// default. Note that, if a pseudo class has pref, whatever its default
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// value is, it'll later be changed in nsCSSPseudoClasses::AddRefAtoms()
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// If the pseudo class has "ENABLED_IN" flags but doesn't have a pref,
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// it is an internal pseudo class which is disabled elsewhere.
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#define IS_ENABLED_BY_DEFAULT(flags_) \
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(!((flags_) & CSS_PSEUDO_CLASS_ENABLED_MASK))
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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IS_ENABLED_BY_DEFAULT(flags_),
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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#undef IS_ENABLED_BY_DEFAULT
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};
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void nsCSSPseudoClasses::AddRefAtoms()
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{
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NS_RegisterStaticAtoms(CSSPseudoClasses_info);
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#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
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if (pref_[0]) { \
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auto idx = static_cast<CSSPseudoElementTypeBase>(Type::name_); \
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Preferences::AddBoolVarCache(&sPseudoClassEnabled[idx], pref_); \
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}
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#include "nsCSSPseudoClassList.h"
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#undef CSS_PSEUDO_CLASS
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}
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bool
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nsCSSPseudoClasses::HasStringArg(Type aType)
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{
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return aType == Type::lang ||
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aType == Type::mozEmptyExceptChildrenWithLocalname ||
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aType == Type::mozSystemMetric ||
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aType == Type::mozLocaleDir ||
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aType == Type::mozDir ||
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aType == Type::dir;
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}
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bool
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nsCSSPseudoClasses::HasNthPairArg(Type aType)
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{
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return aType == Type::nthChild ||
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aType == Type::nthLastChild ||
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aType == Type::nthOfType ||
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aType == Type::nthLastOfType;
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}
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void
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nsCSSPseudoClasses::PseudoTypeToString(Type aType, nsAString& aString)
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{
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MOZ_ASSERT(aType < Type::Count, "Unexpected type");
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auto idx = static_cast<CSSPseudoClassTypeBase>(aType);
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(*CSSPseudoClasses_info[idx].mAtom)->ToString(aString);
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}
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/* static */ CSSPseudoClassType
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nsCSSPseudoClasses::GetPseudoType(nsIAtom* aAtom, EnabledState aEnabledState)
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{
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for (uint32_t i = 0; i < ArrayLength(CSSPseudoClasses_info); ++i) {
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if (*CSSPseudoClasses_info[i].mAtom == aAtom) {
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Type type = Type(i);
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return IsEnabled(type, aEnabledState) ? type : Type::NotPseudo;
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}
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}
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return Type::NotPseudo;
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}
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/* static */ bool
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nsCSSPseudoClasses::IsUserActionPseudoClass(Type aType)
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{
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// See http://dev.w3.org/csswg/selectors4/#useraction-pseudos
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return aType == Type::hover ||
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aType == Type::active ||
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aType == Type::focus;
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}
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