/usr/include/firefox/nsAttrName.h is in firefox-dev 11.0+build1-0ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* ***** 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* IBM Corporation.
* Portions created by the Initial Developer are Copyright (C) 2003
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* IBM Corporation
*
* 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 ***** */
/*
* Class that represents the name (nodeinfo or atom) of an attribute;
* using nodeinfos all the time is too slow, so we use atoms when we
* can.
*/
#ifndef nsAttrName_h___
#define nsAttrName_h___
#include "nsINodeInfo.h"
#include "nsIAtom.h"
#include "nsDOMString.h"
typedef PRUptrdiff PtrBits;
#define NS_ATTRNAME_NODEINFO_BIT 1
class nsAttrName
{
public:
nsAttrName(const nsAttrName& aOther)
: mBits(aOther.mBits)
{
AddRefInternalName();
}
explicit nsAttrName(nsIAtom* aAtom)
: mBits(reinterpret_cast<PtrBits>(aAtom))
{
NS_ASSERTION(aAtom, "null atom-name in nsAttrName");
NS_ADDREF(aAtom);
}
explicit nsAttrName(nsINodeInfo* aNodeInfo)
{
NS_ASSERTION(aNodeInfo, "null nodeinfo-name in nsAttrName");
if (aNodeInfo->NamespaceEquals(kNameSpaceID_None)) {
mBits = reinterpret_cast<PtrBits>(aNodeInfo->NameAtom());
NS_ADDREF(aNodeInfo->NameAtom());
}
else {
mBits = reinterpret_cast<PtrBits>(aNodeInfo) |
NS_ATTRNAME_NODEINFO_BIT;
NS_ADDREF(aNodeInfo);
}
}
~nsAttrName()
{
ReleaseInternalName();
}
void SetTo(nsINodeInfo* aNodeInfo)
{
NS_ASSERTION(aNodeInfo, "null nodeinfo-name in nsAttrName");
ReleaseInternalName();
if (aNodeInfo->NamespaceEquals(kNameSpaceID_None)) {
mBits = reinterpret_cast<PtrBits>(aNodeInfo->NameAtom());
NS_ADDREF(aNodeInfo->NameAtom());
}
else {
mBits = reinterpret_cast<PtrBits>(aNodeInfo) |
NS_ATTRNAME_NODEINFO_BIT;
NS_ADDREF(aNodeInfo);
}
}
void SetTo(nsIAtom* aAtom)
{
NS_ASSERTION(aAtom, "null atom-name in nsAttrName");
ReleaseInternalName();
mBits = reinterpret_cast<PtrBits>(aAtom);
NS_ADDREF(aAtom);
}
bool IsAtom() const
{
return !(mBits & NS_ATTRNAME_NODEINFO_BIT);
}
nsINodeInfo* NodeInfo() const
{
NS_ASSERTION(!IsAtom(), "getting nodeinfo-value of atom-name");
return reinterpret_cast<nsINodeInfo*>(mBits & ~NS_ATTRNAME_NODEINFO_BIT);
}
nsIAtom* Atom() const
{
NS_ASSERTION(IsAtom(), "getting atom-value of nodeinfo-name");
return reinterpret_cast<nsIAtom*>(mBits);
}
bool Equals(const nsAttrName& aOther) const
{
return mBits == aOther.mBits;
}
// Faster comparison in the case we know the namespace is null
bool Equals(nsIAtom* aAtom) const
{
return reinterpret_cast<PtrBits>(aAtom) == mBits;
}
bool Equals(nsIAtom* aLocalName, PRInt32 aNamespaceID) const
{
if (aNamespaceID == kNameSpaceID_None) {
return Equals(aLocalName);
}
return !IsAtom() && NodeInfo()->Equals(aLocalName, aNamespaceID);
}
bool Equals(nsINodeInfo* aNodeInfo) const
{
return Equals(aNodeInfo->NameAtom(), aNodeInfo->NamespaceID());
}
PRInt32 NamespaceID() const
{
return IsAtom() ? kNameSpaceID_None : NodeInfo()->NamespaceID();
}
PRInt32 NamespaceEquals(PRInt32 aNamespaceID) const
{
return aNamespaceID == kNameSpaceID_None ?
IsAtom() :
(!IsAtom() && NodeInfo()->NamespaceEquals(aNamespaceID));
}
nsIAtom* LocalName() const
{
return IsAtom() ? Atom() : NodeInfo()->NameAtom();
}
nsIAtom* GetPrefix() const
{
return IsAtom() ? nsnull : NodeInfo()->GetPrefixAtom();
}
bool QualifiedNameEquals(const nsAString& aName) const
{
return IsAtom() ? Atom()->Equals(aName) :
NodeInfo()->QualifiedNameEquals(aName);
}
void GetQualifiedName(nsAString& aStr) const
{
if (IsAtom()) {
Atom()->ToString(aStr);
}
else {
aStr = NodeInfo()->QualifiedName();
}
}
void GetPrefix(nsAString& aStr) const
{
if (IsAtom()) {
SetDOMStringToNull(aStr);
}
else {
NodeInfo()->GetPrefix(aStr);
}
}
PRUint32 HashValue() const
{
// mBits and PRUint32 might have different size. This should silence
// any warnings or compile-errors. This is what the implementation of
// NS_PTR_TO_INT32 does to take care of the same problem.
return mBits - 0;
}
bool IsSmaller(nsIAtom* aOther) const
{
return mBits < reinterpret_cast<PtrBits>(aOther);
}
private:
void AddRefInternalName()
{
// Since both nsINodeInfo and nsIAtom inherit nsISupports as its first
// interface we can safely assume that it's first in the vtable
nsISupports* name = reinterpret_cast<nsISupports *>
(mBits & ~NS_ATTRNAME_NODEINFO_BIT);
NS_ADDREF(name);
}
void ReleaseInternalName()
{
// Since both nsINodeInfo and nsIAtom inherit nsISupports as its first
// interface we can safely assume that it's first in the vtable
nsISupports* name = reinterpret_cast<nsISupports *>
(mBits & ~NS_ATTRNAME_NODEINFO_BIT);
NS_RELEASE(name);
}
PtrBits mBits;
};
#endif
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