gecko-dev/layout/style/nsCSSAnonBoxes.cpp

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 anonymous boxes */

#include "mozilla/ArrayUtils.h"

#include "nsCSSAnonBoxes.h"
#include "nsGkAtomConsts.h"
#include "nsStaticAtomUtils.h"

using namespace mozilla;

static nsStaticAtom* GetAtomBase() {
  return const_cast<nsStaticAtom*>(
      nsGkAtoms::GetAtomByIndex(kAtomIndex_AnonBoxes));
}

bool nsCSSAnonBoxes::IsAnonBox(nsAtom* aAtom) {
  return nsStaticAtomUtils::IsMember(aAtom, GetAtomBase(),
                                     kAtomCount_AnonBoxes);
}

#ifdef MOZ_XUL
/* static */ bool nsCSSAnonBoxes::IsTreePseudoElement(nsAtom* aPseudo) {
  MOZ_ASSERT(nsCSSAnonBoxes::IsAnonBox(aPseudo));
  return StringBeginsWith(nsDependentAtomString(aPseudo),
                          NS_LITERAL_STRING(":-moz-tree-"));
}
#endif

/* static*/ nsCSSAnonBoxes::NonInheriting
nsCSSAnonBoxes::NonInheritingTypeForPseudoTag(nsAtom* aPseudo) {
  MOZ_ASSERT(IsNonInheritingAnonBox(aPseudo));
  Maybe<uint32_t> index =
      nsStaticAtomUtils::Lookup(aPseudo, GetAtomBase(), kAtomCount_AnonBoxes);
  MOZ_RELEASE_ASSERT(index.isSome());
  return static_cast<NonInheriting>(*index);
}

#ifdef DEBUG
/* static */ void nsCSSAnonBoxes::AssertAtoms() {
  nsStaticAtom* base = GetAtomBase();
  size_t index = 0;
#define CSS_ANON_BOX(name_, value_)                                 \
  {                                                                 \
    RefPtr<nsAtom> atom = NS_Atomize(value_);                       \
    MOZ_ASSERT(atom == nsGkAtoms::AnonBox_##name_,                  \
               "Static atom for " #name_ " has incorrect value");   \
    MOZ_ASSERT(atom == &base[index],                                \
               "Static atom for " #name_ " not at expected index"); \
    ++index;                                                        \
  }
#include "nsCSSAnonBoxList.h"
#undef CSS_ANON_BOX
}
#endif