gecko-dev/dom/base/nsWrapperCacheInlines.h

150 lines
4.5 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** 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 Gecko DOM code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Peter Van der Beken <peterv@propagandism.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 ***** */
#ifndef nsWrapperCacheInline_h___
#define nsWrapperCacheInline_h___
#include "nsWrapperCache.h"
#include "xpcpublic.h"
inline JSObject*
nsWrapperCache::GetWrapperPreserveColor() const
{
JSObject *obj = GetJSObjectFromBits();
return !IsProxy() || !obj || js::IsProxy(obj) ? obj : nsnull;
}
inline JSObject*
nsWrapperCache::GetWrapper() const
{
JSObject* obj = GetWrapperPreserveColor();
xpc_UnmarkGrayObject(obj);
return obj;
}
inline void
nsWrapperCache::SetWrapper(JSObject* aWrapper)
{
NS_ASSERTION(!PreservingWrapper(), "Clearing a preserved wrapper!");
NS_ASSERTION(aWrapper, "Use ClearWrapper!");
JSObject *obj = GetJSObjectFromBits();
if (obj && mozilla::dom::binding::isExpandoObject(obj)) {
NS_ASSERTION(mozilla::dom::binding::instanceIsProxy(aWrapper),
"We have an expando but this isn't a DOM proxy?");
js::SetProxyExtra(aWrapper, mozilla::dom::binding::JSPROXYSLOT_EXPANDO,
js::ObjectValue(*obj));
}
SetWrapperBits(aWrapper);
}
inline JSObject*
nsWrapperCache::GetExpandoObjectPreserveColor() const
{
JSObject *obj = GetJSObjectFromBits();
if (!obj) {
return NULL;
}
if (!IsProxy()) {
// If we support non-proxy dom binding objects then this should be:
//return mozilla::dom::binding::isExpandoObject(obj) ? obj : js::GetSlot(obj, EXPANDO_SLOT);
return NULL;
}
// FIXME unmark gray?
if (mozilla::dom::binding::instanceIsProxy(obj)) {
return GetExpandoFromSlot(obj);
}
return mozilla::dom::binding::isExpandoObject(obj) ? obj : NULL;
}
inline JSObject*
nsWrapperCache::GetExpandoFromSlot(JSObject *obj)
{
NS_ASSERTION(mozilla::dom::binding::instanceIsProxy(obj),
"Asking for an expando but this isn't a DOM proxy?");
const js::Value &v = js::GetProxyExtra(obj, mozilla::dom::binding::JSPROXYSLOT_EXPANDO);
return v.isUndefined() ? NULL : v.toObjectOrNull();
}
inline void
nsWrapperCache::ClearWrapper()
{
NS_ASSERTION(!PreservingWrapper(), "Clearing a preserved wrapper!");
JSObject *obj = GetJSObjectFromBits();
if (!obj) {
return;
}
JSObject *expando;
if (mozilla::dom::binding::instanceIsProxy(obj)) {
expando = GetExpandoFromSlot(obj);
}
else {
// If we support non-proxy dom binding objects then this should be:
//expando = js::GetSlot(obj, EXPANDO_SLOT);
expando = NULL;
}
SetWrapperBits(expando);
}
inline void
nsWrapperCache::ClearWrapperIfProxy()
{
if (!IsProxy()) {
return;
}
RemoveExpandoObject();
SetWrapperBits(NULL);
}
inline bool
nsWrapperCache::IsBlack()
{
JSObject* o = GetWrapperPreserveColor();
return o && !xpc_IsGrayGCThing(o);
}
#endif /* nsWrapperCache_h___ */