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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef nsIGlobalObject_h__
#define nsIGlobalObject_h__
#include "nsISupports.h"
#include "nsTArray.h"
#include "js/TypeDecls.h"
#define NS_IGLOBALOBJECT_IID \
{ 0x11afa8be, 0xd997, 0x4e07, \
{ 0xa6, 0xa3, 0x6f, 0x87, 0x2e, 0xc3, 0xee, 0x7f } }
class nsACString;
class nsCString;
class nsCycleCollectionTraversalCallback;
class nsIPrincipal;
namespace mozilla{
namespace dom{
class VoidFunction;
}
}
class nsIGlobalObject : public nsISupports
{
nsTArray<nsCString> mHostObjectURIs;
bool mIsDying;
protected:
nsIGlobalObject()
: mIsDying(false)
{}
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_IGLOBALOBJECT_IID)
/**
* This check is added to deal with Promise microtask queues. On the main
* thread, we do not impose restrictions about when script stops running or
* when runnables can no longer be dispatched to the main thread. This means
* it is possible for a Promise chain to keep resolving an infinite chain of
* promises, preventing the browser from shutting down. See Bug 1058695. To
* prevent this, the nsGlobalWindow subclass sets this flag when it is
* closed. The Promise implementation checks this and prohibits new runnables
* from being dispatched.
*
* We pair this with checks during processing the promise microtask queue
* that pops up the slow script dialog when the Promise queue is preventing
* a window from going away.
*/
bool
IsDying() const
{
return mIsDying;
}
// GetGlobalJSObject may return a gray object. If this ever changes so that
// it stops doing that, please simplify the code in FindAssociatedGlobal in
// BindingUtils.h that does JS::ExposeObjectToActiveJS on the return value of
// GetGlobalJSObject. Also, in that case the JS::ExposeObjectToActiveJS in
// AutoJSAPI::InitInternal can probably be removed. And also the similar
// calls in XrayWrapper and nsGlobalWindow.
virtual JSObject* GetGlobalJSObject() = 0;
// This method is not meant to be overridden.
nsIPrincipal* PrincipalOrNull();
void RegisterHostObjectURI(const nsACString& aURI);
void UnregisterHostObjectURI(const nsACString& aURI);
// Any CC class inheriting nsIGlobalObject should call these 2 methods if it
// exposes the URL API.
void UnlinkHostObjectURIs();
void TraverseHostObjectURIs(nsCycleCollectionTraversalCallback &aCb);
virtual bool IsInSyncOperation() { return false; }
void QueueMicrotask(mozilla::dom::VoidFunction& aCallback);
protected:
virtual ~nsIGlobalObject();
void
StartDying()
{
mIsDying = true;
}
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsIGlobalObject,
NS_IGLOBALOBJECT_IID)
#endif // nsIGlobalObject_h__
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