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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* atom list for CSS pseudo-classes */
#include "mozilla/ArrayUtils.h"
#include "nsCSSPseudoClasses.h"
#include "nsStaticAtom.h"
#include "mozilla/Preferences.h"
#include "nsString.h"
using namespace mozilla;
using namespace mozilla::css;
// define storage for all atoms
#define CSS_PSEUDO_CLASS(_name, _value, _flags, _pref) \
static nsIAtom* sPseudoClass_##_name;
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
NS_STATIC_ATOM_BUFFER(name_##_pseudo_class_buffer, value_)
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
static_assert(!((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_CHROME) || \
((flags_) & CSS_PSEUDO_CLASS_ENABLED_IN_UA_SHEETS), \
"Pseudo-class '" #name_ "' is enabled in chrome, so it " \
"should also be enabled in UA sheets");
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
// Array of nsStaticAtom for each of the pseudo-classes.
static const nsStaticAtom CSSPseudoClasses_info[] = {
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
NS_STATIC_ATOM(name_##_pseudo_class_buffer, &sPseudoClass_##name_),
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
};
// Flags data for each of the pseudo-classes, which must be separate
// from the previous array since there's no place for it in
// nsStaticAtom.
/* static */ const uint32_t
nsCSSPseudoClasses::kPseudoClassFlags[] = {
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
flags_,
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
};
/* static */ bool
nsCSSPseudoClasses::sPseudoClassEnabled[] = {
// If the pseudo class has any "ENABLED_IN" flag set, it is disabled by
// default. Note that, if a pseudo class has pref, whatever its default
// value is, it'll later be changed in nsCSSPseudoClasses::AddRefAtoms()
// If the pseudo class has "ENABLED_IN" flags but doesn't have a pref,
// it is an internal pseudo class which is disabled elsewhere.
#define IS_ENABLED_BY_DEFAULT(flags_) \
(!((flags_) & CSS_PSEUDO_CLASS_ENABLED_MASK))
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
IS_ENABLED_BY_DEFAULT(flags_),
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
#undef IS_ENABLED_BY_DEFAULT
};
void nsCSSPseudoClasses::AddRefAtoms()
{
NS_RegisterStaticAtoms(CSSPseudoClasses_info);
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
if (pref_[0]) { \
auto idx = static_cast<CSSPseudoElementTypeBase>(Type::name_); \
Preferences::AddBoolVarCache(&sPseudoClassEnabled[idx], pref_); \
}
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
}
bool
nsCSSPseudoClasses::HasStringArg(Type aType)
{
return aType == Type::lang ||
aType == Type::mozEmptyExceptChildrenWithLocalname ||
aType == Type::mozSystemMetric ||
aType == Type::mozLocaleDir ||
aType == Type::mozDir ||
aType == Type::dir;
}
bool
nsCSSPseudoClasses::HasNthPairArg(Type aType)
{
return aType == Type::nthChild ||
aType == Type::nthLastChild ||
aType == Type::nthOfType ||
aType == Type::nthLastOfType;
}
bool
nsCSSPseudoClasses::HasSingleSelectorArg(Type aType)
{
return aType == Type::host ||
aType == Type::hostContext;
}
bool
nsCSSPseudoClasses::HasForgivingSelectorListArg(Type aType)
{
return aType == Type::is ||
aType == Type::matches ||
aType == Type::any ||
aType == Type::where;
}
bool
nsCSSPseudoClasses::HasSelectorListArg(Type aType)
{
return HasForgivingSelectorListArg(aType) ||
aType == Type::negation ||
aType == Type::mozAny ||
aType == Type::mozAnyPrivate ||
aType == Type::host ||
aType == Type::hostContext;
}
bool
nsCSSPseudoClasses::HasOptionalSelectorListArg(Type aType)
{
return aType == Type::host;
}
bool
nsCSSPseudoClasses::IsHiddenFromSerialization(Type aType)
{
return aType == Type::mozAnyPrivate;
}
void
nsCSSPseudoClasses::PseudoTypeToString(Type aType, nsAString& aString)
{
MOZ_ASSERT(aType < Type::Count, "Unexpected type");
auto idx = static_cast<CSSPseudoClassTypeBase>(aType);
(*CSSPseudoClasses_info[idx].mAtom)->ToString(aString);
}
/* static */ CSSPseudoClassType
nsCSSPseudoClasses::GetPseudoType(nsIAtom* aAtom, EnabledState aEnabledState)
{
for (uint32_t i = 0; i < ArrayLength(CSSPseudoClasses_info); ++i) {
if (*CSSPseudoClasses_info[i].mAtom == aAtom) {
Type type = Type(i);
return IsEnabled(type, aEnabledState) ? type : Type::NotPseudo;
}
}
return Type::NotPseudo;
}
/* static */ bool
nsCSSPseudoClasses::IsUserActionPseudoClass(Type aType)
{
// See http://dev.w3.org/csswg/selectors4/#useraction-pseudos
return aType == Type::hover ||
aType == Type::active ||
aType == Type::focus;
}
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