gecko/dom/workers/Navigator.cpp
Igor Bukanov 83623b313c Bug 737365 - stop using the cx during finalization, part 1.
This part changes the signatures for various finalization API to take
not JSContext* but rather either JSFreeOp structure or its
library-private counterpart FreeOp. These structures wrap parameters
that are passed to the finalizers removing most of explicit dependencies
on JSContext in the finalization code.
2012-03-19 15:34:55 +01:00

211 lines
6.1 KiB
C++

/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* ***** 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 Web Workers.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ben Turner <bent.mozilla@gmail.com> (Original Author)
*
* 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 ***** */
#include "Navigator.h"
#include "jsapi.h"
#include "jsfriendapi.h"
#include "nsTraceRefcnt.h"
#include "RuntimeService.h"
#define PROPERTY_FLAGS \
(JSPROP_ENUMERATE | JSPROP_SHARED)
USING_WORKERS_NAMESPACE
namespace {
class Navigator
{
static JSClass sClass;
static JSPropertySpec sProperties[];
enum SLOT {
SLOT_appName = 0,
SLOT_appVersion,
SLOT_platform,
SLOT_userAgent,
SLOT_COUNT
};
public:
static JSObject*
InitClass(JSContext* aCx, JSObject* aObj)
{
return JS_InitClass(aCx, aObj, NULL, &sClass, Construct, 0, sProperties,
NULL, NULL, NULL);
}
static JSObject*
Create(JSContext* aCx)
{
RuntimeService* rts = RuntimeService::GetService();
JS_ASSERT(rts);
const RuntimeService::NavigatorStrings& strings =
rts->GetNavigatorStrings();
JSString* appName, *version, *platform, *userAgent;
#define COPY_STRING(_jsstr, _str) \
if (strings. _str .IsEmpty()) { \
_jsstr = NULL; \
} \
else if (!(_jsstr = JS_NewUCStringCopyN(aCx, strings. _str .get(), \
strings. _str .Length()))) { \
return NULL; \
}
COPY_STRING(appName, mAppName);
COPY_STRING(version, mAppVersion);
COPY_STRING(platform, mPlatform);
COPY_STRING(userAgent, mUserAgent);
#undef COPY_STRING
JSObject* obj = JS_NewObject(aCx, &sClass, NULL, NULL);
if (!obj) {
return NULL;
}
jsval empty = JS_GetEmptyStringValue(aCx);
JS_SetReservedSlot(obj, SLOT_appName,
appName ? STRING_TO_JSVAL(appName) : empty);
JS_SetReservedSlot(obj, SLOT_appVersion,
version ? STRING_TO_JSVAL(version) : empty);
JS_SetReservedSlot(obj, SLOT_platform,
platform ? STRING_TO_JSVAL(platform) : empty);
JS_SetReservedSlot(obj, SLOT_userAgent,
userAgent ? STRING_TO_JSVAL(userAgent) : empty);
Navigator* priv = new Navigator();
JS_SetPrivate(obj, priv);
return obj;
}
private:
Navigator()
{
MOZ_COUNT_CTOR(mozilla::dom::workers::Navigator);
}
~Navigator()
{
MOZ_COUNT_DTOR(mozilla::dom::workers::Navigator);
}
static JSBool
Construct(JSContext* aCx, unsigned aArgc, jsval* aVp)
{
JS_ReportErrorNumber(aCx, js_GetErrorMessage, NULL, JSMSG_WRONG_CONSTRUCTOR,
sClass.name);
return false;
}
static void
Finalize(JSFreeOp* aFop, JSObject* aObj)
{
JS_ASSERT(JS_GetClass(aObj) == &sClass);
delete static_cast<Navigator*>(JS_GetPrivate(aObj));
}
static JSBool
GetProperty(JSContext* aCx, JSObject* aObj, jsid aIdval, jsval* aVp)
{
JSClass* classPtr = JS_GetClass(aObj);
if (classPtr != &sClass) {
JS_ReportErrorNumber(aCx, js_GetErrorMessage, NULL,
JSMSG_INCOMPATIBLE_PROTO, sClass.name, "GetProperty",
classPtr->name);
return false;
}
JS_ASSERT(JSID_IS_INT(aIdval));
JS_ASSERT(JSID_TO_INT(aIdval) >= 0 && JSID_TO_INT(aIdval) < SLOT_COUNT);
*aVp = JS_GetReservedSlot(aObj, JSID_TO_INT(aIdval));
return true;
}
};
JSClass Navigator::sClass = {
"WorkerNavigator",
JSCLASS_HAS_PRIVATE | JSCLASS_HAS_RESERVED_SLOTS(SLOT_COUNT),
JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, Finalize
};
JSPropertySpec Navigator::sProperties[] = {
{ "appName", SLOT_appName, PROPERTY_FLAGS, GetProperty,
js_GetterOnlyPropertyStub },
{ "appVersion", SLOT_appVersion, PROPERTY_FLAGS, GetProperty,
js_GetterOnlyPropertyStub },
{ "platform", SLOT_platform, PROPERTY_FLAGS, GetProperty,
js_GetterOnlyPropertyStub },
{ "userAgent", SLOT_userAgent, PROPERTY_FLAGS, GetProperty,
js_GetterOnlyPropertyStub },
{ 0, 0, 0, NULL, NULL }
};
} // anonymous namespace
BEGIN_WORKERS_NAMESPACE
namespace navigator {
bool
InitClass(JSContext* aCx, JSObject* aGlobal)
{
return !!Navigator::InitClass(aCx, aGlobal);
}
JSObject*
Create(JSContext* aCx)
{
return Navigator::Create(aCx);
}
} // namespace navigator
END_WORKERS_NAMESPACE