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https://github.com/mozilla/gecko-dev.git
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fa514af6ea
I tested locally that the MOZ_GCC_VERSION_AT_LEAST() and MOZ_GCC_VERSION_AT_MOST() expressions do sensible things when I fiddle with the numbers to make them more or less than my local gcc version. (I tested this for all 4 expressions.) I don't know for sure that this will fix the crashes we're seeing, but it seems like it should undo the change that triggered it, so I think it's worth trying. MozReview-Commit-ID: IXYYn3mLQBf --HG-- extra : transplant_source : %20%94%06%05L%8A%CA%DD%83%D9%23jh%E53%EF%F9%A3%0C%B4
129 lines
4.7 KiB
C++
129 lines
4.7 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-elements */
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#ifndef nsCSSPseudoElements_h___
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#define nsCSSPseudoElements_h___
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#include "nsIAtom.h"
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#include "mozilla/CSSEnabledState.h"
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#include "mozilla/Compiler.h"
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// Is this pseudo-element a CSS2 pseudo-element that can be specified
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// with the single colon syntax (in addition to the double-colon syntax,
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// which can be used for all pseudo-elements)?
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#define CSS_PSEUDO_ELEMENT_IS_CSS2 (1<<0)
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// Is this pseudo-element a pseudo-element that can contain other
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// elements?
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// (Currently pseudo-elements are either leaves of the tree (relative to
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// real elements) or they contain other elements in a non-tree-like
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// manner (i.e., like incorrectly-nested start and end tags). It's
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// possible that in the future there might be container pseudo-elements
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// that form a properly nested tree structure. If that happens, we
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// should probably split this flag into two.)
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#define CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS (1<<1)
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// Flag to add the ability to take into account style attribute set for the
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// pseudo element (by default it's ignored).
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#define CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE (1<<2)
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// Flag that indicate the pseudo-element supports a user action pseudo-class
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// following it, such as :active or :hover. This would normally correspond
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// to whether the pseudo-element is tree-like, but we don't support these
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// pseudo-classes on ::before and ::after generated content yet. See
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// http://dev.w3.org/csswg/selectors4/#pseudo-elements.
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#define CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE (1<<3)
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// Is content prevented from parsing selectors containing this pseudo-element?
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#define CSS_PSEUDO_ELEMENT_UA_SHEET_ONLY (1<<4)
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namespace mozilla {
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// The total count of CSSPseudoElement is less than 256,
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// so use uint8_t as its underlying type.
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typedef uint8_t CSSPseudoElementTypeBase;
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enum class CSSPseudoElementType : CSSPseudoElementTypeBase {
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// If the actual pseudo-elements stop being first here, change
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// GetPseudoType.
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#define CSS_PSEUDO_ELEMENT(_name, _value_, _flags) \
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_name,
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#include "nsCSSPseudoElementList.h"
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#undef CSS_PSEUDO_ELEMENT
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Count,
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AnonBox = Count,
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#ifdef MOZ_XUL
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XULTree,
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#endif
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NotPseudo,
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MAX
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};
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} // namespace mozilla
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// Empty class derived from nsIAtom so that function signatures can
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// require an atom from this atom list.
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class nsICSSPseudoElement : public nsIAtom {};
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class nsCSSPseudoElements
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{
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typedef mozilla::CSSPseudoElementType Type;
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typedef mozilla::CSSEnabledState EnabledState;
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public:
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static void AddRefAtoms();
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static bool IsPseudoElement(nsIAtom *aAtom);
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static bool IsCSS2PseudoElement(nsIAtom *aAtom);
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#define CSS_PSEUDO_ELEMENT(_name, _value, _flags) \
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static nsICSSPseudoElement* _name;
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#include "nsCSSPseudoElementList.h"
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#undef CSS_PSEUDO_ELEMENT
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static Type GetPseudoType(nsIAtom* aAtom, EnabledState aEnabledState);
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// Get the atom for a given Type. aType must be < CSSPseudoElementType::Count
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static nsIAtom* GetPseudoAtom(Type aType);
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static bool PseudoElementContainsElements(const Type aType) {
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return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS);
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}
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static bool PseudoElementSupportsStyleAttribute(const Type aType) {
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MOZ_ASSERT(aType < Type::Count);
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return PseudoElementHasFlags(aType,
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CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE);
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}
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static bool PseudoElementSupportsUserActionState(const Type aType);
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static bool IsEnabled(Type aType, EnabledState aEnabledState)
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{
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return !PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_UA_SHEET_ONLY) ||
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(aEnabledState & EnabledState::eInUASheets);
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}
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private:
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// Does the given pseudo-element have all of the flags given?
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// Work around https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64037 ,
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// which is a general gcc bug that we seem to have hit only on Android/x86.
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#if defined(ANDROID) && defined(__i386__) && defined(__GNUC__) && \
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!defined(__clang__)
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#if (MOZ_GCC_VERSION_AT_LEAST(4,8,0) && MOZ_GCC_VERSION_AT_MOST(4,8,4)) || \
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(MOZ_GCC_VERSION_AT_LEAST(4,9,0) && MOZ_GCC_VERSION_AT_MOST(4,9,2))
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__attribute__((noinline))
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#endif
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#endif
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static bool PseudoElementHasFlags(const Type aType, uint32_t aFlags)
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{
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MOZ_ASSERT(aType < Type::Count);
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return (kPseudoElementFlags[size_t(aType)] & aFlags) == aFlags;
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}
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static const uint32_t kPseudoElementFlags[size_t(Type::Count)];
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};
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#endif /* nsCSSPseudoElements_h___ */
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