The Tor Browser: layout/style/nsCSSPseudoClasses.cpp@7e26c7da4463

     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-classes */

     8 #include "mozilla/ArrayUtils.h"

    10 #include "nsCSSPseudoClasses.h"

    11 #include "nsStaticAtom.h"

    12 #include "mozilla/Preferences.h"

    13 #include "nsString.h"

    15 using namespace mozilla;

    17 // define storage for all atoms

    18 #define CSS_PSEUDO_CLASS(_name, _value, _pref) \

    19   static nsIAtom* sPseudoClass_##_name;

    20 #include "nsCSSPseudoClassList.h"

    21 #undef CSS_PSEUDO_CLASS

    23 #define CSS_PSEUDO_CLASS(name_, value_, pref_)  \

    24   NS_STATIC_ATOM_BUFFER(name_##_pseudo_class_buffer, value_)

    25 #include "nsCSSPseudoClassList.h"

    26 #undef CSS_PSEUDO_CLASS

    28 static const nsStaticAtom CSSPseudoClasses_info[] = {

    29 #define CSS_PSEUDO_CLASS(name_, value_, pref_)            \

    30   NS_STATIC_ATOM(name_##_pseudo_class_buffer, &sPseudoClass_##name_),

    31 #include "nsCSSPseudoClassList.h"

    32 #undef CSS_PSEUDO_CLASS

    33 };

    35 static bool sPseudoClassEnabled[] = {

    36 #define CSS_PSEUDO_CLASS(name_, value_, pref_)            \

    37   true,

    38 #include "nsCSSPseudoClassList.h"

    39 #undef CSS_PSEUDO_CLASS

    40 };

    42 void nsCSSPseudoClasses::AddRefAtoms()

    43 {

    44   NS_RegisterStaticAtoms(CSSPseudoClasses_info);

    46 #define CSS_PSEUDO_CLASS(name_, value_, pref_)                               \

    47   if (pref_[0]) {                                                            \

    48     Preferences::AddBoolVarCache(&sPseudoClassEnabled[ePseudoClass_##name_], \

    49                                  pref_);                                     \

    50   }

    51 #include "nsCSSPseudoClassList.h"

    52 #undef CSS_PSEUDO_CLASS

    53 }

    55 bool

    56 nsCSSPseudoClasses::HasStringArg(Type aType)

    57 {

    58   return aType == ePseudoClass_lang ||

    59          aType == ePseudoClass_mozEmptyExceptChildrenWithLocalname ||

    60          aType == ePseudoClass_mozSystemMetric ||

    61          aType == ePseudoClass_mozLocaleDir ||

    62          aType == ePseudoClass_dir;

    63 }

    65 bool

    66 nsCSSPseudoClasses::HasNthPairArg(Type aType)

    67 {

    68   return aType == ePseudoClass_nthChild ||

    69          aType == ePseudoClass_nthLastChild ||

    70          aType == ePseudoClass_nthOfType ||

    71          aType == ePseudoClass_nthLastOfType;

    72 }

    74 void

    75 nsCSSPseudoClasses::PseudoTypeToString(Type aType, nsAString& aString)

    76 {

    77   NS_ABORT_IF_FALSE(aType < ePseudoClass_Count, "Unexpected type");

    78   NS_ABORT_IF_FALSE(aType >= 0, "Very unexpected type");

    79   (*CSSPseudoClasses_info[aType].mAtom)->ToString(aString);

    80 }

    82 nsCSSPseudoClasses::Type

    83 nsCSSPseudoClasses::GetPseudoType(nsIAtom* aAtom)

    84 {

    85   for (uint32_t i = 0; i < ArrayLength(CSSPseudoClasses_info); ++i) {

    86     if (*CSSPseudoClasses_info[i].mAtom == aAtom) {

    87       return sPseudoClassEnabled[i] ? Type(i) : ePseudoClass_NotPseudoClass;

    88     }

    89   }

    91   return nsCSSPseudoClasses::ePseudoClass_NotPseudoClass;

    92 }

    94 /* static */ bool

    95 nsCSSPseudoClasses::IsUserActionPseudoClass(Type aType)

    96 {

    97   // See http://dev.w3.org/csswg/selectors4/#useraction-pseudos

    98   return aType == ePseudoClass_hover ||

    99          aType == ePseudoClass_active ||

   100          aType == ePseudoClass_focus;

   101 }

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