michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /* atom list for CSS pseudo-elements */
michael@0: 
michael@0: #ifndef nsCSSPseudoElements_h___
michael@0: #define nsCSSPseudoElements_h___
michael@0: 
michael@0: #include "nsIAtom.h"
michael@0: 
michael@0: // Is this pseudo-element a CSS2 pseudo-element that can be specified
michael@0: // with the single colon syntax (in addition to the double-colon syntax,
michael@0: // which can be used for all pseudo-elements)?
michael@0: #define CSS_PSEUDO_ELEMENT_IS_CSS2                     (1<<0)
michael@0: // Is this pseudo-element a pseudo-element that can contain other
michael@0: // elements?
michael@0: // (Currently pseudo-elements are either leaves of the tree (relative to
michael@0: // real elements) or they contain other elements in a non-tree-like
michael@0: // manner (i.e., like incorrectly-nested start and end tags).  It's
michael@0: // possible that in the future there might be container pseudo-elements
michael@0: // that form a properly nested tree structure.  If that happens, we
michael@0: // should probably split this flag into two.)
michael@0: #define CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS           (1<<1)
michael@0: // Flag to add the ability to take into account style attribute set for the
michael@0: // pseudo element (by default it's ignored).
michael@0: #define CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE    (1<<2)
michael@0: // Flag that indicate the pseudo-element supports a user action pseudo-class
michael@0: // following it, such as :active or :hover.  This would normally correspond
michael@0: // to whether the pseudo-element is tree-like, but we don't support these
michael@0: // pseudo-classes on ::before and ::after generated content yet.  See
michael@0: // http://dev.w3.org/csswg/selectors4/#pseudo-elements.
michael@0: #define CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE  (1<<3)
michael@0: // Is content prevented from parsing selectors containing this pseudo-element?
michael@0: #define CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY              (1<<4)
michael@0: 
michael@0: // Empty class derived from nsIAtom so that function signatures can
michael@0: // require an atom from this atom list.
michael@0: class nsICSSPseudoElement : public nsIAtom {};
michael@0: 
michael@0: class nsCSSPseudoElements {
michael@0: public:
michael@0: 
michael@0:   static void AddRefAtoms();
michael@0: 
michael@0:   static bool IsPseudoElement(nsIAtom *aAtom);
michael@0: 
michael@0:   static bool IsCSS2PseudoElement(nsIAtom *aAtom);
michael@0: 
michael@0: #define CSS_PSEUDO_ELEMENT(_name, _value, _flags) \
michael@0:   static nsICSSPseudoElement* _name;
michael@0: #include "nsCSSPseudoElementList.h"
michael@0: #undef CSS_PSEUDO_ELEMENT
michael@0: 
michael@0:   enum Type {
michael@0:     // If the actual pseudo-elements stop being first here, change
michael@0:     // GetPseudoType.
michael@0: #define CSS_PSEUDO_ELEMENT(_name, _value_, _flags) \
michael@0:     ePseudo_##_name,
michael@0: #include "nsCSSPseudoElementList.h"
michael@0: #undef CSS_PSEUDO_ELEMENT
michael@0:     ePseudo_PseudoElementCount,
michael@0:     ePseudo_AnonBox = ePseudo_PseudoElementCount,
michael@0: #ifdef MOZ_XUL
michael@0:     ePseudo_XULTree,
michael@0: #endif
michael@0:     ePseudo_NotPseudoElement,
michael@0:     ePseudo_MAX
michael@0:   };
michael@0: 
michael@0:   static Type GetPseudoType(nsIAtom* aAtom);
michael@0: 
michael@0:   // Get the atom for a given Type.  aType must be < ePseudo_PseudoElementCount
michael@0:   static nsIAtom* GetPseudoAtom(Type aType);
michael@0: 
michael@0:   static bool PseudoElementContainsElements(const Type aType) {
michael@0:     return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_CONTAINS_ELEMENTS);
michael@0:   }
michael@0: 
michael@0:   static bool PseudoElementSupportsStyleAttribute(const Type aType) {
michael@0:     MOZ_ASSERT(aType < ePseudo_PseudoElementCount);
michael@0:     return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_SUPPORTS_STYLE_ATTRIBUTE);
michael@0:   }
michael@0: 
michael@0:   static bool PseudoElementSupportsUserActionState(const Type aType);
michael@0: 
michael@0:   static bool PseudoElementIsChromeOnly(const Type aType) {
michael@0:     MOZ_ASSERT(aType < ePseudo_PseudoElementCount);
michael@0:     return PseudoElementHasFlags(aType, CSS_PSEUDO_ELEMENT_IS_CHROME_ONLY);
michael@0:   }
michael@0: 
michael@0: private:
michael@0:   static uint32_t FlagsForPseudoElement(const Type aType);
michael@0: 
michael@0:   // Does the given pseudo-element have all of the flags given?
michael@0:   static bool PseudoElementHasFlags(const Type aType, uint32_t aFlags)
michael@0:   {
michael@0:     return (FlagsForPseudoElement(aType) & aFlags) == aFlags;
michael@0:   }
michael@0: };
michael@0: 
michael@0: #endif /* nsCSSPseudoElements_h___ */