зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
3.1 KiB
C++
88 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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 DOM_BASE_GLOBALTEARDOWNOBSERVER_H_
|
|
#define DOM_BASE_GLOBALTEARDOWNOBSERVER_H_
|
|
|
|
#include "mozilla/Attributes.h"
|
|
#include "mozilla/dom/EventTarget.h"
|
|
#include "mozilla/RefPtr.h"
|
|
#include "nsCycleCollectionParticipant.h"
|
|
#include "nsID.h"
|
|
#include "nsIGlobalObject.h"
|
|
#include "nsIScriptGlobalObject.h"
|
|
#include "nsISupports.h"
|
|
#include "nsISupportsUtils.h"
|
|
#include "nsPIDOMWindow.h"
|
|
|
|
#define NS_GLOBALTEARDOWNOBSERVER_IID \
|
|
{ \
|
|
0xc31fddb9, 0xec49, 0x4f24, { \
|
|
0x90, 0x16, 0xb5, 0x2b, 0x26, 0x6c, 0xb6, 0x29 \
|
|
} \
|
|
}
|
|
|
|
namespace mozilla {
|
|
|
|
class GlobalTeardownObserver
|
|
: public nsISupports,
|
|
public LinkedListElement<GlobalTeardownObserver> {
|
|
public:
|
|
NS_DECLARE_STATIC_IID_ACCESSOR(NS_GLOBALTEARDOWNOBSERVER_IID)
|
|
|
|
GlobalTeardownObserver();
|
|
explicit GlobalTeardownObserver(nsIGlobalObject* aGlobalObject,
|
|
bool aHasOrHasHadOwnerWindow = false);
|
|
|
|
nsPIDOMWindowInner* GetOwner() const { return mOwnerWindow; }
|
|
nsIGlobalObject* GetOwnerGlobal() const { return mParentObject; }
|
|
bool HasOrHasHadOwner() { return mHasOrHasHadOwnerWindow; }
|
|
|
|
void GetParentObject(nsIScriptGlobalObject** aParentObject) {
|
|
if (mParentObject) {
|
|
CallQueryInterface(mParentObject, aParentObject);
|
|
} else {
|
|
*aParentObject = nullptr;
|
|
}
|
|
}
|
|
|
|
virtual void DisconnectFromOwner();
|
|
|
|
// A global permanently becomes invalid when DisconnectEventTargetObjects() is
|
|
// called. Normally this means:
|
|
// - For the main thread, when nsGlobalWindowInner::FreeInnerObjects is
|
|
// called.
|
|
// - For a worker thread, when clearing the main event queue. (Which we do
|
|
// slightly later than when the spec notionally calls for it to be done.)
|
|
//
|
|
// A global may also become temporarily invalid when:
|
|
// - For the main thread, if the window is no longer the WindowProxy's current
|
|
// inner window due to being placed in the bfcache.
|
|
nsresult CheckCurrentGlobalCorrectness() const;
|
|
|
|
protected:
|
|
virtual ~GlobalTeardownObserver();
|
|
|
|
void BindToOwner(nsIGlobalObject* aOwner);
|
|
|
|
private:
|
|
// The parent global object. The global will clear this when
|
|
// it is destroyed by calling DisconnectFromOwner().
|
|
nsIGlobalObject* MOZ_NON_OWNING_REF mParentObject = nullptr;
|
|
// mParentObject pre QI-ed and cached (inner window)
|
|
// (it is needed for off main thread access)
|
|
// It is obtained in BindToOwner and reset in DisconnectFromOwner.
|
|
nsPIDOMWindowInner* MOZ_NON_OWNING_REF mOwnerWindow = nullptr;
|
|
bool mHasOrHasHadOwnerWindow = false;
|
|
};
|
|
|
|
NS_DEFINE_STATIC_IID_ACCESSOR(GlobalTeardownObserver,
|
|
NS_GLOBALTEARDOWNOBSERVER_IID)
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif
|