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2d0a072174
This will make implementing the new behavior behind a pref really straight-forward, and is generally nicer. Depends on D121858 Differential Revision: https://phabricator.services.mozilla.com/D121705
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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-elements */
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#include "nsCSSPseudoElements.h"
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#include "mozilla/ArrayUtils.h"
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#include "nsCSSAnonBoxes.h"
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#include "nsDOMString.h"
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#include "nsGkAtomConsts.h"
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#include "nsStaticAtomUtils.h"
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using namespace mozilla;
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// Flags data for each of the pseudo-elements.
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/* static */ const uint32_t nsCSSPseudoElements::kPseudoElementFlags[] = {
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#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) flags_,
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#include "nsCSSPseudoElementList.h"
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#undef CSS_PSEUDO_ELEMENT
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};
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/* static */
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nsStaticAtom* nsCSSPseudoElements::GetAtomBase() {
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return const_cast<nsStaticAtom*>(
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nsGkAtoms::GetAtomByIndex(kAtomIndex_PseudoElements));
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}
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/* static */
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nsAtom* nsCSSPseudoElements::GetPseudoAtom(Type aType) {
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MOZ_ASSERT(PseudoStyle::IsPseudoElement(aType), "Unexpected type");
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size_t index = kAtomIndex_PseudoElements + static_cast<size_t>(aType);
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return nsGkAtoms::GetAtomByIndex(index);
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}
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/* static */
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Maybe<PseudoStyleType> nsCSSPseudoElements::GetPseudoType(
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const nsAString& aPseudoElement, CSSEnabledState aEnabledState) {
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if (DOMStringIsNull(aPseudoElement) || aPseudoElement.IsEmpty()) {
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return Some(PseudoStyleType::NotPseudo);
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}
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if (aPseudoElement.First() != char16_t(':')) {
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return Nothing();
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}
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// deal with two-colon forms of aPseudoElt
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nsAString::const_iterator start, end;
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aPseudoElement.BeginReading(start);
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aPseudoElement.EndReading(end);
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NS_ASSERTION(start != end, "aPseudoElement is not empty!");
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++start;
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bool haveTwoColons = true;
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if (start == end || *start != char16_t(':')) {
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--start;
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haveTwoColons = false;
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}
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RefPtr<nsAtom> pseudo = NS_Atomize(Substring(start, end));
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MOZ_ASSERT(pseudo);
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Maybe<uint32_t> index = nsStaticAtomUtils::Lookup(pseudo, GetAtomBase(),
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kAtomCount_PseudoElements);
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if (index.isNothing()) {
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return Nothing();
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}
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auto type = static_cast<Type>(*index);
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if (!haveTwoColons &&
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!PseudoElementHasFlags(type, CSS_PSEUDO_ELEMENT_IS_CSS2)) {
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return Nothing();
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}
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return IsEnabled(type, aEnabledState) ? Some(type) : Nothing();
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}
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/* static */
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bool nsCSSPseudoElements::PseudoElementSupportsUserActionState(
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const Type aType) {
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return PseudoElementHasFlags(aType,
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CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE);
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}
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/* static */
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nsString nsCSSPseudoElements::PseudoTypeAsString(Type aPseudoType) {
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switch (aPseudoType) {
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case PseudoStyleType::before:
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return u"::before"_ns;
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case PseudoStyleType::after:
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return u"::after"_ns;
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case PseudoStyleType::marker:
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return u"::marker"_ns;
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default:
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MOZ_ASSERT(aPseudoType == PseudoStyleType::NotPseudo,
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"Unexpected pseudo type");
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return u""_ns;
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}
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}
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#ifdef DEBUG
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/* static */
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void nsCSSPseudoElements::AssertAtoms() {
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nsStaticAtom* base = GetAtomBase();
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# define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
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{ \
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RefPtr<nsAtom> atom = NS_Atomize(value_); \
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size_t index = static_cast<size_t>(PseudoStyleType::name_); \
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MOZ_ASSERT(atom == nsGkAtoms::PseudoElement_##name_, \
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"Static atom for " #name_ " has incorrect value"); \
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MOZ_ASSERT(atom == &base[index], \
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"Static atom for " #name_ " not at expected index"); \
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}
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# include "nsCSSPseudoElementList.h"
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# undef CSS_PSEUDO_ELEMENT
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}
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#endif
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