From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- layout/style/nsCSSPseudoElements.h | 167 +++++++++++++++++++++++++++++++++++++ 1 file changed, 167 insertions(+) create mode 100644 layout/style/nsCSSPseudoElements.h (limited to 'layout/style/nsCSSPseudoElements.h') diff --git a/layout/style/nsCSSPseudoElements.h b/layout/style/nsCSSPseudoElements.h new file mode 100644 index 0000000000..4be1d57716 --- /dev/null +++ b/layout/style/nsCSSPseudoElements.h @@ -0,0 +1,167 @@ +/* -*- 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 */ + +#ifndef nsCSSPseudoElements_h___ +#define nsCSSPseudoElements_h___ + +#include "nsGkAtoms.h" +#include "mozilla/CSSEnabledState.h" +#include "mozilla/Compiler.h" +#include "mozilla/PseudoStyleType.h" +#include "mozilla/StaticPrefs_dom.h" + +// Is this pseudo-element a CSS2 pseudo-element that can be specified +// with the single colon syntax (in addition to the double-colon syntax, +// which can be used for all pseudo-elements)? +// +// Note: We also rely on this for IsEagerlyCascadedInServo. +#define CSS_PSEUDO_ELEMENT_IS_CSS2 (1 << 0) +// Is this pseudo-element a pseudo-element that can contain other +// elements? +// (Currently pseudo-elements are either leaves of the tree (relative to +// real elements) or they contain other elements in a non-tree-like +// manner (i.e., like incorrectly-nested start and end tags). It's +// possible that in the future there might be container pseudo-elements +// that form a properly nested tree structure. If that happens, we +// should probably split this flag into two.) +#define CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS (1 << 1) +// Flag to add the ability to take into account style attribute set for the +// pseudo element (by default it's ignored). +#define CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE (1 << 2) +// Flag that indicate the pseudo-element supports a user action pseudo-class +// following it, such as :active or :hover. This would normally correspond +// to whether the pseudo-element is tree-like, but we don't support these +// pseudo-classes on ::before and ::after generated content yet. See +// http://dev.w3.org/csswg/selectors4/#pseudo-elements. +#define CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE (1 << 3) +// Should this pseudo-element be enabled only for UA sheets? +#define CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS (1 << 4) +// Should this pseudo-element be enabled only for UA sheets and chrome +// stylesheets? +#define CSS_PSEUDO_ELEMENT_ENABLED_IN_CHROME (1 << 5) + +#define CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS_AND_CHROME \ + (CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS | \ + CSS_PSEUDO_ELEMENT_ENABLED_IN_CHROME) + +// Can we use the ChromeOnly document.createElement(..., { pseudo: "::foo" }) +// API for creating pseudo-implementing native anonymous content in JS with this +// pseudo-element? +#define CSS_PSEUDO_ELEMENT_IS_JS_CREATED_NAC (1 << 6) +// Does this pseudo-element act like an item for containers (such as flex and +// grid containers) and thus needs parent display-based style fixup? +#define CSS_PSEUDO_ELEMENT_IS_FLEX_OR_GRID_ITEM (1 << 7) + +class nsCSSPseudoElements { + typedef mozilla::PseudoStyleType Type; + typedef mozilla::CSSEnabledState EnabledState; + + public: + static bool IsEagerlyCascadedInServo(const Type aType) { + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_IS_CSS2); + } + + public: +#ifdef DEBUG + static void AssertAtoms(); +#endif + +// Alias nsCSSPseudoElements::foo() to nsGkAtoms::foo. +#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \ + static nsCSSPseudoElementStaticAtom* name_() { \ + return const_cast( \ + static_cast( \ + nsGkAtoms::PseudoElement_##name_)); \ + } +#include "nsCSSPseudoElementList.h" +#undef CSS_PSEUDO_ELEMENT + + // Returns Nothing() for a syntactically invalid pseudo-element, and NotPseudo + // for the empty / null string. + static mozilla::Maybe GetPseudoType( + const nsAString& aPseudoElement, + EnabledState = EnabledState::ForAllContent); + + // Get the atom for a given Type. aType must be < + // PseudoType::CSSPseudoElementsEnd. + // This only ever returns static atoms, so it's fine to return a raw pointer. + static nsAtom* GetPseudoAtom(Type aType); + + // Get the atom for a given pseudo-element string (e.g. "::before"). This can + // return dynamic atoms, for unrecognized pseudo-elements. + static already_AddRefed GetPseudoAtom( + const nsAString& aPseudoElement); + + static bool PseudoElementContainsElements(const Type aType) { + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS); + } + + static bool PseudoElementSupportsStyleAttribute(const Type aType) { + MOZ_ASSERT(aType < Type::CSSPseudoElementsEnd); + return PseudoElementHasFlags(aType, + CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE); + } + + static bool PseudoElementSupportsUserActionState(const Type aType); + + static bool PseudoElementIsJSCreatedNAC(Type aType) { + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_IS_JS_CREATED_NAC); + } + + static bool PseudoElementIsFlexOrGridItem(const Type aType) { + return PseudoElementHasFlags(aType, + CSS_PSEUDO_ELEMENT_IS_FLEX_OR_GRID_ITEM); + } + + static bool EnabledInContent(Type aType) { + if (aType == Type::highlight && + !mozilla::StaticPrefs::dom_customHighlightAPI_enabled()) { + return false; + } + return !PseudoElementHasAnyFlag( + aType, CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS_AND_CHROME); + } + + static bool IsEnabled(Type aType, EnabledState aEnabledState) { + if (EnabledInContent(aType)) { + return true; + } + + if ((aEnabledState & EnabledState::InUASheets) && + PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_ENABLED_IN_UA_SHEETS)) { + return true; + } + + if ((aEnabledState & EnabledState::InChrome) && + PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_ENABLED_IN_CHROME)) { + return true; + } + + return false; + } + + static nsString PseudoTypeAsString(Type aPseudoType); + + private: + // Does the given pseudo-element have all of the flags given? + static bool PseudoElementHasFlags(const Type aType, uint32_t aFlags) { + MOZ_ASSERT(aType < Type::CSSPseudoElementsEnd); + return (kPseudoElementFlags[size_t(aType)] & aFlags) == aFlags; + } + + static bool PseudoElementHasAnyFlag(const Type aType, uint32_t aFlags) { + MOZ_ASSERT(aType < Type::CSSPseudoElementsEnd); + return (kPseudoElementFlags[size_t(aType)] & aFlags) != 0; + } + + static nsStaticAtom* GetAtomBase(); + + static const uint32_t kPseudoElementFlags[size_t(Type::CSSPseudoElementsEnd)]; +}; + +#endif /* nsCSSPseudoElements_h___ */ -- cgit v1.2.3