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comparison: layout/style/nsCSSPseudoElements.h
layout/style/nsCSSPseudoElements.h
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| -1:000000000000 | 0:42fd14c31a53 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 /* atom list for CSS pseudo-elements */ | |
| 7 | |
| 8 #ifndef nsCSSPseudoElements_h___ | |
| 9 #define nsCSSPseudoElements_h___ | |
| 10 | |
| 11 #include "nsIAtom.h" | |
| 12 | |
| 13 // Is this pseudo-element a CSS2 pseudo-element that can be specified | |
| 14 // with the single colon syntax (in addition to the double-colon syntax, | |
| 15 // which can be used for all pseudo-elements)? | |
| 16 #define CSS_PSEUDO_ELEMENT_IS_CSS2 (1<<0) | |
| 17 // Is this pseudo-element a pseudo-element that can contain other | |
| 18 // elements? | |
| 19 // (Currently pseudo-elements are either leaves of the tree (relative to | |
| 20 // real elements) or they contain other elements in a non-tree-like | |
| 21 // manner (i.e., like incorrectly-nested start and end tags). It's | |
| 22 // possible that in the future there might be container pseudo-elements | |
| 23 // that form a properly nested tree structure. If that happens, we | |
| 24 // should probably split this flag into two.) | |
| 25 #define CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS (1<<1) | |
| 26 // Flag to add the ability to take into account style attribute set for the | |
| 27 // pseudo element (by default it's ignored). | |
| 28 #define CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE (1<<2) | |
| 29 // Flag that indicate the pseudo-element supports a user action pseudo-class | |
| 30 // following it, such as :active or :hover. This would normally correspond | |
| 31 // to whether the pseudo-element is tree-like, but we don't support these | |
| 32 // pseudo-classes on ::before and ::after generated content yet. See | |
| 33 // http://dev.w3.org/csswg/selectors4/#pseudo-elements. | |
| 34 #define CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE (1<<3) | |
| 35 // Is content prevented from parsing selectors containing this pseudo-element? | |
| 36 #define CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY (1<<4) | |
| 37 | |
| 38 // Empty class derived from nsIAtom so that function signatures can | |
| 39 // require an atom from this atom list. | |
| 40 class nsICSSPseudoElement : public nsIAtom {}; | |
| 41 | |
| 42 class nsCSSPseudoElements { | |
| 43 public: | |
| 44 | |
| 45 static void AddRefAtoms(); | |
| 46 | |
| 47 static bool IsPseudoElement(nsIAtom *aAtom); | |
| 48 | |
| 49 static bool IsCSS2PseudoElement(nsIAtom *aAtom); | |
| 50 | |
| 51 #define CSS_PSEUDO_ELEMENT(_name, _value, _flags) \ | |
| 52 static nsICSSPseudoElement* _name; | |
| 53 #include "nsCSSPseudoElementList.h" | |
| 54 #undef CSS_PSEUDO_ELEMENT | |
| 55 | |
| 56 enum Type { | |
| 57 // If the actual pseudo-elements stop being first here, change | |
| 58 // GetPseudoType. | |
| 59 #define CSS_PSEUDO_ELEMENT(_name, _value_, _flags) \ | |
| 60 ePseudo_##_name, | |
| 61 #include "nsCSSPseudoElementList.h" | |
| 62 #undef CSS_PSEUDO_ELEMENT | |
| 63 ePseudo_PseudoElementCount, | |
| 64 ePseudo_AnonBox = ePseudo_PseudoElementCount, | |
| 65 #ifdef MOZ_XUL | |
| 66 ePseudo_XULTree, | |
| 67 #endif | |
| 68 ePseudo_NotPseudoElement, | |
| 69 ePseudo_MAX | |
| 70 }; | |
| 71 | |
| 72 static Type GetPseudoType(nsIAtom* aAtom); | |
| 73 | |
| 74 // Get the atom for a given Type. aType must be < ePseudo_PseudoElementCount | |
| 75 static nsIAtom* GetPseudoAtom(Type aType); | |
| 76 | |
| 77 static bool PseudoElementContainsElements(const Type aType) { | |
| 78 return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS); | |
| 79 } | |
| 80 | |
| 81 static bool PseudoElementSupportsStyleAttribute(const Type aType) { | |
| 82 MOZ_ASSERT(aType < ePseudo_PseudoElementCount); | |
| 83 return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE); | |
| 84 } | |
| 85 | |
| 86 static bool PseudoElementSupportsUserActionState(const Type aType); | |
| 87 | |
| 88 static bool PseudoElementIsChromeOnly(const Type aType) { | |
| 89 MOZ_ASSERT(aType < ePseudo_PseudoElementCount); | |
| 90 return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY); | |
| 91 } | |
| 92 | |
| 93 private: | |
| 94 static uint32_t FlagsForPseudoElement(const Type aType); | |
| 95 | |
| 96 // Does the given pseudo-element have all of the flags given? | |
| 97 static bool PseudoElementHasFlags(const Type aType, uint32_t aFlags) | |
| 98 { | |
| 99 return (FlagsForPseudoElement(aType) & aFlags) == aFlags; | |
| 100 } | |
| 101 }; | |
| 102 | |
| 103 #endif /* nsCSSPseudoElements_h___ */ |
