The Tor Browser: layout/style/nsCSSPseudoElements.cpp@141e0f1194b1

     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/. */

     6 /* atom list for CSS pseudo-elements */

     8 #include "mozilla/ArrayUtils.h"

    10 #include "nsCSSPseudoElements.h"

    11 #include "nsAtomListUtils.h"

    12 #include "nsStaticAtom.h"

    13 #include "nsCSSAnonBoxes.h"

    15 using namespace mozilla;

    17 // define storage for all atoms

    18 #define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \

    19   nsICSSPseudoElement* nsCSSPseudoElements::name_;

    20 #include "nsCSSPseudoElementList.h"

    21 #undef CSS_PSEUDO_ELEMENT

    23 #define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \

    24   NS_STATIC_ATOM_BUFFER(name_##_pseudo_element_buffer, value_)

    25 #include "nsCSSPseudoElementList.h"

    26 #undef CSS_PSEUDO_ELEMENT

    28 static const nsStaticAtom CSSPseudoElements_info[] = {

    29 #define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \

    30   NS_STATIC_ATOM(name_##_pseudo_element_buffer, (nsIAtom**)&nsCSSPseudoElements::name_),

    31 #include "nsCSSPseudoElementList.h"

    32 #undef CSS_PSEUDO_ELEMENT

    33 };

    35 // Separate from the array above so that we can have an array of

    36 // nsStaticAtom (to pass to NS_RegisterStaticAtoms and

    37 // nsAtomListUtils::IsMember), but with corresponding indices (so the

    38 // i-th element of this array is the flags for the i-th pseudo-element

    39 // in the previous array).

    40 static const uint32_t CSSPseudoElements_flags[] = {

    41 #define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \

    42   flags_,

    43 #include "nsCSSPseudoElementList.h"

    44 #undef CSS_PSEUDO_ELEMENT

    45 };

    47 void nsCSSPseudoElements::AddRefAtoms()

    48 {

    49   NS_RegisterStaticAtoms(CSSPseudoElements_info);

    50 }

    52 bool nsCSSPseudoElements::IsPseudoElement(nsIAtom *aAtom)

    53 {

    54   return nsAtomListUtils::IsMember(aAtom, CSSPseudoElements_info,

    55                                    ArrayLength(CSSPseudoElements_info));

    56 }

    58 /* static */ bool

    59 nsCSSPseudoElements::IsCSS2PseudoElement(nsIAtom *aAtom)

    60 {

    61   // We don't implement this using PseudoElementHasFlags because callers

    62   // want to pass things that could be anon boxes.

    63   NS_ASSERTION(nsCSSPseudoElements::IsPseudoElement(aAtom) ||

    64                nsCSSAnonBoxes::IsAnonBox(aAtom),

    65                "must be pseudo element or anon box");

    66   bool result = aAtom == nsCSSPseudoElements::after ||

    67                   aAtom == nsCSSPseudoElements::before ||

    68                   aAtom == nsCSSPseudoElements::firstLetter ||

    69                   aAtom == nsCSSPseudoElements::firstLine;

    70   NS_ASSERTION(nsCSSAnonBoxes::IsAnonBox(aAtom) ||

    71                result ==

    72                  PseudoElementHasFlags(GetPseudoType(aAtom), CSS_PSEUDO_ELEMENT_IS_CSS2),

    73                "result doesn't match flags");

    74   return result;

    75 }

    77 /* static */ nsCSSPseudoElements::Type

    78 nsCSSPseudoElements::GetPseudoType(nsIAtom *aAtom)

    79 {

    80   for (uint32_t i = 0; i < ArrayLength(CSSPseudoElements_info); ++i) {

    81     if (*CSSPseudoElements_info[i].mAtom == aAtom) {

    82       return Type(i);

    83     }

    84   }

    86   if (nsCSSAnonBoxes::IsAnonBox(aAtom)) {

    87 #ifdef MOZ_XUL

    88     if (nsCSSAnonBoxes::IsTreePseudoElement(aAtom)) {

    89       return ePseudo_XULTree;

    90     }

    91 #endif

    93     return ePseudo_AnonBox;

    94   }

    96   return ePseudo_NotPseudoElement;

    97 }

    99 /* static */ nsIAtom*

   100 nsCSSPseudoElements::GetPseudoAtom(Type aType)

   101 {

   102   NS_ASSERTION(aType < nsCSSPseudoElements::ePseudo_PseudoElementCount,

   103                "Unexpected type");

   104   return *CSSPseudoElements_info[aType].mAtom;

   105 }

   107 /* static */ uint32_t

   108 nsCSSPseudoElements::FlagsForPseudoElement(const Type aType)

   109 {

   110   size_t index = static_cast<size_t>(aType);

   111   NS_ASSERTION(index < ArrayLength(CSSPseudoElements_flags),

   112                "argument must be a pseudo-element");

   113   return CSSPseudoElements_flags[index];

   114 }

   116 /* static */ bool

   117 nsCSSPseudoElements::PseudoElementSupportsUserActionState(const Type aType)

   118 {

   119   return PseudoElementHasFlags(aType,

   120                                CSS_PSEUDO_ELEMENT_SUPPORTS_USER_ACTION_STATE);

   121 }

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