gecko-dev/layout/style/nsCSSPseudoElements.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is atom lists for CSS pseudos.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* L. David Baron <dbaron@dbaron.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* atom list for CSS pseudo-elements */
#include "mozilla/Util.h"
#include "nsCSSPseudoElements.h"
#include "nsAtomListUtils.h"
#include "nsStaticAtom.h"
#include "nsMemory.h"
#include "nsCSSAnonBoxes.h"
using namespace mozilla;
// define storage for all atoms
#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
nsICSSPseudoElement* nsCSSPseudoElements::name_;
#include "nsCSSPseudoElementList.h"
#undef CSS_PSEUDO_ELEMENT
#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
NS_STATIC_ATOM_BUFFER(name_##_buffer, value_)
#include "nsCSSPseudoElementList.h"
#undef CSS_PSEUDO_ELEMENT
static const nsStaticAtom CSSPseudoElements_info[] = {
#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
NS_STATIC_ATOM(name_##_buffer, (nsIAtom**)&nsCSSPseudoElements::name_),
#include "nsCSSPseudoElementList.h"
#undef CSS_PSEUDO_ELEMENT
};
// Separate from the array above so that we can have an array of
// nsStaticAtom (to pass to NS_RegisterStaticAtoms and
// nsAtomListUtils::IsMember), but with corresponding indices (so the
// i-th element of this array is the flags for the i-th pseudo-element
// in the previous array).
static const PRUint32 CSSPseudoElements_flags[] = {
#define CSS_PSEUDO_ELEMENT(name_, value_, flags_) \
flags_,
#include "nsCSSPseudoElementList.h"
#undef CSS_PSEUDO_ELEMENT
};
void nsCSSPseudoElements::AddRefAtoms()
{
NS_RegisterStaticAtoms(CSSPseudoElements_info,
ArrayLength(CSSPseudoElements_info));
}
bool nsCSSPseudoElements::IsPseudoElement(nsIAtom *aAtom)
{
return nsAtomListUtils::IsMember(aAtom, CSSPseudoElements_info,
ArrayLength(CSSPseudoElements_info));
}
/* static */ bool
nsCSSPseudoElements::IsCSS2PseudoElement(nsIAtom *aAtom)
{
// We don't implement this using PseudoElementHasFlags because callers
// want to pass things that could be anon boxes.
NS_ASSERTION(nsCSSPseudoElements::IsPseudoElement(aAtom) ||
nsCSSAnonBoxes::IsAnonBox(aAtom),
"must be pseudo element or anon box");
bool result = aAtom == nsCSSPseudoElements::after ||
aAtom == nsCSSPseudoElements::before ||
aAtom == nsCSSPseudoElements::firstLetter ||
aAtom == nsCSSPseudoElements::firstLine;
NS_ASSERTION(nsCSSAnonBoxes::IsAnonBox(aAtom) ||
result ==
PseudoElementHasFlags(aAtom, CSS_PSEUDO_ELEMENT_IS_CSS2),
"result doesn't match flags");
return result;
}
/* static */ nsCSSPseudoElements::Type
nsCSSPseudoElements::GetPseudoType(nsIAtom *aAtom)
{
for (PRUint32 i = 0; i < ArrayLength(CSSPseudoElements_info); ++i) {
if (*CSSPseudoElements_info[i].mAtom == aAtom) {
return Type(i);
}
}
if (nsCSSAnonBoxes::IsAnonBox(aAtom)) {
#ifdef MOZ_XUL
if (nsCSSAnonBoxes::IsTreePseudoElement(aAtom)) {
return ePseudo_XULTree;
}
#endif
return ePseudo_AnonBox;
}
return ePseudo_NotPseudoElement;
}
/* static */ nsIAtom*
nsCSSPseudoElements::GetPseudoAtom(Type aType)
{
NS_ASSERTION(aType < nsCSSPseudoElements::ePseudo_PseudoElementCount,
"Unexpected type");
return *CSSPseudoElements_info[aType].mAtom;
}
/* static */ PRUint32
nsCSSPseudoElements::FlagsForPseudoElement(nsIAtom *aAtom)
{
PRUint32 i;
for (i = 0; i < ArrayLength(CSSPseudoElements_info); ++i) {
if (*CSSPseudoElements_info[i].mAtom == aAtom) {
break;
}
}
NS_ASSERTION(i < ArrayLength(CSSPseudoElements_info),
"argument must be a pseudo-element");
return CSSPseudoElements_flags[i];
}