89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsIGlobalObject_h__
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#define nsIGlobalObject_h__
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#include "nsISupports.h"
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#include "nsTArray.h"
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#include "js/TypeDecls.h"
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#define NS_IGLOBALOBJECT_IID \
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{ 0x11afa8be, 0xd997, 0x4e07, \
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{ 0xa6, 0xa3, 0x6f, 0x87, 0x2e, 0xc3, 0xee, 0x7f } }
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class nsACString;
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class nsCString;
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class nsCycleCollectionTraversalCallback;
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class nsIPrincipal;
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class nsIGlobalObject : public nsISupports
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{
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nsTArray<nsCString> mHostObjectURIs;
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bool mIsDying;
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protected:
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nsIGlobalObject()
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: mIsDying(false)
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{}
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_IGLOBALOBJECT_IID)
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/**
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* This check is added to deal with Promise microtask queues. On the main
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* thread, we do not impose restrictions about when script stops running or
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* when runnables can no longer be dispatched to the main thread. This means
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* it is possible for a Promise chain to keep resolving an infinite chain of
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* promises, preventing the browser from shutting down. See Bug 1058695. To
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* prevent this, the nsGlobalWindow subclass sets this flag when it is
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* closed. The Promise implementation checks this and prohibits new runnables
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* from being dispatched.
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*
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* We pair this with checks during processing the promise microtask queue
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* that pops up the slow script dialog when the Promise queue is preventing
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* a window from going away.
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*/
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bool
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IsDying() const
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{
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return mIsDying;
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}
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// GetGlobalJSObject may return a gray object. If this ever changes so that
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// it stops doing that, please simplify the code in FindAssociatedGlobal in
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// BindingUtils.h that does JS::ExposeObjectToActiveJS on the return value of
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// GetGlobalJSObject. Also, in that case the JS::ExposeObjectToActiveJS in
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// AutoJSAPI::InitInternal can probably be removed. And also the similar
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// calls in XrayWrapper and nsGlobalWindow.
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virtual JSObject* GetGlobalJSObject() = 0;
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// This method is not meant to be overridden.
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nsIPrincipal* PrincipalOrNull();
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void RegisterHostObjectURI(const nsACString& aURI);
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void UnregisterHostObjectURI(const nsACString& aURI);
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// Any CC class inheriting nsIGlobalObject should call these 2 methods if it
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// exposes the URL API.
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void UnlinkHostObjectURIs();
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void TraverseHostObjectURIs(nsCycleCollectionTraversalCallback &aCb);
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protected:
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virtual ~nsIGlobalObject();
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void
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StartDying()
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{
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mIsDying = true;
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}
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsIGlobalObject,
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NS_IGLOBALOBJECT_IID)
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#endif // nsIGlobalObject_h__
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