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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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-elements */
#include "nsCSSPseudoElements.h"
#include "mozilla/ArrayUtils.h"
#include "nsCSSAnonBoxes.h"
#include "nsDOMString.h"
#include "nsGkAtomConsts.h"
#include "nsStaticAtomUtils.h"
using namespace mozilla;
// Flags data for each of the pseudo-elements.
/* static */ const uint32_t nsCSSPseudoElements::kPseudoElementFlags[] = {
#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) flags_,
#include "nsCSSPseudoElementList.h"
#undef CSS_PSEUDO_ELEMENT
};
/* static */
nsStaticAtom* nsCSSPseudoElements::GetAtomBase() {
return const_cast<nsStaticAtom*>(
nsGkAtoms::GetAtomByIndex(kAtomIndex_PseudoElements));
}
bool nsCSSPseudoElements::IsPseudoElement(nsAtom* aAtom) {
return nsStaticAtomUtils::IsMember(aAtom, GetAtomBase(),
kAtomCount_PseudoElements);
}
/* static */
bool nsCSSPseudoElements::IsCSS2PseudoElement(nsAtom* aAtom) {
// We don't implement this using PseudoElementHasFlags because callers
// want to pass things that could be anon boxes.
MOZ_ASSERT(IsPseudoElement(aAtom), "must be pseudo element");
bool result = aAtom == nsCSSPseudoElements::after() ||
aAtom == nsCSSPseudoElements::before() ||
aAtom == nsCSSPseudoElements::firstLetter() ||
aAtom == nsCSSPseudoElements::firstLine();
NS_ASSERTION(
result == PseudoElementHasFlags(
GetPseudoType(aAtom, EnabledState::IgnoreEnabledState),
CSS_PSEUDO_ELEMENT_IS_CSS2),
"result doesn't match flags");
return result;
}
/* static */
PseudoStyleType nsCSSPseudoElements::GetPseudoType(nsAtom* aAtom,
EnabledState aEnabledState) {
Maybe<uint32_t> index = nsStaticAtomUtils::Lookup(aAtom, GetAtomBase(),
kAtomCount_PseudoElements);
if (index.isSome()) {
auto type = static_cast<Type>(*index);
return IsEnabled(type, aEnabledState) ? type : Type::NotPseudo;
}
return Type::NotPseudo;
}
/* static */
nsAtom* nsCSSPseudoElements::GetPseudoAtom(Type aType) {
MOZ_ASSERT(PseudoStyle::IsPseudoElement(aType), "Unexpected type");
size_t index = kAtomIndex_PseudoElements + static_cast<size_t>(aType);
return nsGkAtoms::GetAtomByIndex(index);
}
/* static */
already_AddRefed<nsAtom> nsCSSPseudoElements::GetPseudoAtom(
const nsAString& aPseudoElement) {
if (DOMStringIsNull(aPseudoElement) || aPseudoElement.IsEmpty() ||
aPseudoElement.First() != char16_t(':')) {
return nullptr;
}
// deal with two-colon forms of aPseudoElt
nsAString::const_iterator start, end;
aPseudoElement.BeginReading(start);
aPseudoElement.EndReading(end);
NS_ASSERTION(start != end, "aPseudoElement is not empty!");
++start;
bool haveTwoColons = true;
if (start == end || *start != char16_t(':')) {
--start;
haveTwoColons = false;
}
RefPtr<nsAtom> pseudo = NS_Atomize(Substring(start, end));
MOZ_ASSERT(pseudo);
// There aren't any non-CSS2 pseudo-elements with a single ':'
if (!haveTwoColons &&
(!IsPseudoElement(pseudo) || !IsCSS2PseudoElement(pseudo))) {
// XXXbz I'd really rather we threw an exception or something, but
// the DOM spec sucks.
return nullptr;
}
return pseudo.forget();
}
/* static */
bool nsCSSPseudoElements::PseudoElementSupportsUserActionState(
const Type aType) {
return PseudoElementHasFlags(aType,
CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE);
}
/* static */
nsString nsCSSPseudoElements::PseudoTypeAsString(Type aPseudoType) {
switch (aPseudoType) {
case PseudoStyleType::before:
return u"::before"_ns;
case PseudoStyleType::after:
return u"::after"_ns;
case PseudoStyleType::marker:
return u"::marker"_ns;
default:
MOZ_ASSERT(aPseudoType == PseudoStyleType::NotPseudo,
"Unexpected pseudo type");
return u""_ns;
}
}
#ifdef DEBUG
/* static */
void nsCSSPseudoElements::AssertAtoms() {
nsStaticAtom* base = GetAtomBase();
# define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
{ \
RefPtr<nsAtom> atom = NS_Atomize(value_); \
size_t index = static_cast<size_t>(PseudoStyleType::name_); \
MOZ_ASSERT(atom == nsGkAtoms::PseudoElement_##name_, \
"Static atom for " #name_ " has incorrect value"); \
MOZ_ASSERT(atom == &base[index], \
"Static atom for " #name_ " not at expected index"); \
}
# include "nsCSSPseudoElementList.h"
# undef CSS_PSEUDO_ELEMENT
}
#endif