gecko-dev/layout/style/nsCSSPseudoClasses.cpp

123 строки
3.7 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* atom list for CSS pseudo-classes */
#include "mozilla/ArrayUtils.h"
#include "nsCSSPseudoClasses.h"
#include "nsStaticAtom.h"
#include "mozilla/Preferences.h"
#include "nsString.h"
using namespace mozilla;
// define storage for all atoms
#define CSS_PSEUDO_CLASS(_name, _value, _flags, _pref) \
static nsIAtom* sPseudoClass_##_name;
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
NS_STATIC_ATOM_BUFFER(name_##_pseudo_class_buffer, value_)
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
// Array of nsStaticAtom for each of the pseudo-classes.
static const nsStaticAtom CSSPseudoClasses_info[] = {
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
NS_STATIC_ATOM(name_##_pseudo_class_buffer, &sPseudoClass_##name_),
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
};
// Flags data for each of the pseudo-classes, which must be separate
// from the previous array since there's no place for it in
// nsStaticAtom.
static const uint32_t CSSPseudoClasses_flags[] = {
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
flags_,
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
};
static bool sPseudoClassEnabled[] = {
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
true,
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
};
void nsCSSPseudoClasses::AddRefAtoms()
{
NS_RegisterStaticAtoms(CSSPseudoClasses_info);
#define CSS_PSEUDO_CLASS(name_, value_, flags_, pref_) \
if (pref_[0]) { \
Preferences::AddBoolVarCache(&sPseudoClassEnabled[ePseudoClass_##name_], \
pref_); \
}
#include "nsCSSPseudoClassList.h"
#undef CSS_PSEUDO_CLASS
}
bool
nsCSSPseudoClasses::HasStringArg(Type aType)
{
return aType == ePseudoClass_lang ||
aType == ePseudoClass_mozEmptyExceptChildrenWithLocalname ||
aType == ePseudoClass_mozSystemMetric ||
aType == ePseudoClass_mozLocaleDir ||
aType == ePseudoClass_dir;
}
bool
nsCSSPseudoClasses::HasNthPairArg(Type aType)
{
return aType == ePseudoClass_nthChild ||
aType == ePseudoClass_nthLastChild ||
aType == ePseudoClass_nthOfType ||
aType == ePseudoClass_nthLastOfType;
}
void
nsCSSPseudoClasses::PseudoTypeToString(Type aType, nsAString& aString)
{
NS_ABORT_IF_FALSE(aType < ePseudoClass_Count, "Unexpected type");
NS_ABORT_IF_FALSE(aType >= 0, "Very unexpected type");
(*CSSPseudoClasses_info[aType].mAtom)->ToString(aString);
}
nsCSSPseudoClasses::Type
nsCSSPseudoClasses::GetPseudoType(nsIAtom* aAtom)
{
for (uint32_t i = 0; i < ArrayLength(CSSPseudoClasses_info); ++i) {
if (*CSSPseudoClasses_info[i].mAtom == aAtom) {
return sPseudoClassEnabled[i] ? Type(i) : ePseudoClass_NotPseudoClass;
}
}
return nsCSSPseudoClasses::ePseudoClass_NotPseudoClass;
}
/* static */ bool
nsCSSPseudoClasses::IsUserActionPseudoClass(Type aType)
{
// See http://dev.w3.org/csswg/selectors4/#useraction-pseudos
return aType == ePseudoClass_hover ||
aType == ePseudoClass_active ||
aType == ePseudoClass_focus;
}
/* static */ uint32_t
nsCSSPseudoClasses::FlagsForPseudoClass(const Type aType)
{
size_t index = static_cast<size_t>(aType);
NS_ASSERTION(index < ArrayLength(CSSPseudoClasses_flags),
"argument must be a pseudo-class");
return CSSPseudoClasses_flags[index];
}