1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/nsCSSPseudoElements.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,103 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +/* atom list for CSS pseudo-elements */
1.10 +
1.11 +#ifndef nsCSSPseudoElements_h___
1.12 +#define nsCSSPseudoElements_h___
1.13 +
1.14 +#include "nsIAtom.h"
1.15 +
1.16 +// Is this pseudo-element a CSS2 pseudo-element that can be specified
1.17 +// with the single colon syntax (in addition to the double-colon syntax,
1.18 +// which can be used for all pseudo-elements)?
1.19 +#define CSS_PSEUDO_ELEMENT_IS_CSS2 (1<<0)
1.20 +// Is this pseudo-element a pseudo-element that can contain other
1.21 +// elements?
1.22 +// (Currently pseudo-elements are either leaves of the tree (relative to
1.23 +// real elements) or they contain other elements in a non-tree-like
1.24 +// manner (i.e., like incorrectly-nested start and end tags). It's
1.25 +// possible that in the future there might be container pseudo-elements
1.26 +// that form a properly nested tree structure. If that happens, we
1.27 +// should probably split this flag into two.)
1.28 +#define CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS (1<<1)
1.29 +// Flag to add the ability to take into account style attribute set for the
1.30 +// pseudo element (by default it's ignored).
1.31 +#define CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE (1<<2)
1.32 +// Flag that indicate the pseudo-element supports a user action pseudo-class
1.33 +// following it, such as :active or :hover. This would normally correspond
1.34 +// to whether the pseudo-element is tree-like, but we don't support these
1.35 +// pseudo-classes on ::before and ::after generated content yet. See
1.36 +// http://dev.w3.org/csswg/selectors4/#pseudo-elements.
1.37 +#define CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE (1<<3)
1.38 +// Is content prevented from parsing selectors containing this pseudo-element?
1.39 +#define CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY (1<<4)
1.40 +
1.41 +// Empty class derived from nsIAtom so that function signatures can
1.42 +// require an atom from this atom list.
1.43 +class nsICSSPseudoElement : public nsIAtom {};
1.44 +
1.45 +class nsCSSPseudoElements {
1.46 +public:
1.47 +
1.48 + static void AddRefAtoms();
1.49 +
1.50 + static bool IsPseudoElement(nsIAtom *aAtom);
1.51 +
1.52 + static bool IsCSS2PseudoElement(nsIAtom *aAtom);
1.53 +
1.54 +#define CSS_PSEUDO_ELEMENT(_name, _value, _flags) \
1.55 + static nsICSSPseudoElement* _name;
1.56 +#include "nsCSSPseudoElementList.h"
1.57 +#undef CSS_PSEUDO_ELEMENT
1.58 +
1.59 + enum Type {
1.60 + // If the actual pseudo-elements stop being first here, change
1.61 + // GetPseudoType.
1.62 +#define CSS_PSEUDO_ELEMENT(_name, _value_, _flags) \
1.63 + ePseudo_##_name,
1.64 +#include "nsCSSPseudoElementList.h"
1.65 +#undef CSS_PSEUDO_ELEMENT
1.66 + ePseudo_PseudoElementCount,
1.67 + ePseudo_AnonBox = ePseudo_PseudoElementCount,
1.68 +#ifdef MOZ_XUL
1.69 + ePseudo_XULTree,
1.70 +#endif
1.71 + ePseudo_NotPseudoElement,
1.72 + ePseudo_MAX
1.73 + };
1.74 +
1.75 + static Type GetPseudoType(nsIAtom* aAtom);
1.76 +
1.77 + // Get the atom for a given Type. aType must be < ePseudo_PseudoElementCount
1.78 + static nsIAtom* GetPseudoAtom(Type aType);
1.79 +
1.80 + static bool PseudoElementContainsElements(const Type aType) {
1.81 + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS);
1.82 + }
1.83 +
1.84 + static bool PseudoElementSupportsStyleAttribute(const Type aType) {
1.85 + MOZ_ASSERT(aType < ePseudo_PseudoElementCount);
1.86 + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE);
1.87 + }
1.88 +
1.89 + static bool PseudoElementSupportsUserActionState(const Type aType);
1.90 +
1.91 + static bool PseudoElementIsChromeOnly(const Type aType) {
1.92 + MOZ_ASSERT(aType < ePseudo_PseudoElementCount);
1.93 + return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY);
1.94 + }
1.95 +
1.96 +private:
1.97 + static uint32_t FlagsForPseudoElement(const Type aType);
1.98 +
1.99 + // Does the given pseudo-element have all of the flags given?
1.100 + static bool PseudoElementHasFlags(const Type aType, uint32_t aFlags)
1.101 + {
1.102 + return (FlagsForPseudoElement(aType) & aFlags) == aFlags;
1.103 + }
1.104 +};
1.105 +
1.106 +#endif /* nsCSSPseudoElements_h___ */
