зеркало из https://github.com/mozilla/gecko-dev.git
80 строки
2.6 KiB
C++
80 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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 mozilla_dom_WindowProxyHolder_h__
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#define mozilla_dom_WindowProxyHolder_h__
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#include "mozilla/dom/BrowsingContext.h"
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struct JSContext;
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class JSObject;
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namespace JS {
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template <typename T>
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class MutableHandle;
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} // namespace JS
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namespace mozilla {
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namespace dom {
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/**
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* This class is used for passing arguments and the return value for WebIDL
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* binding code that takes/returns a WindowProxy object and for WebIDL
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* unions/dictionaries that contain a WindowProxy member. It should never
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* contain null; if the value in WebIDL is nullable the binding code will use a
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* Nullable<WindowProxyHolder>.
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*/
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class WindowProxyHolder {
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public:
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WindowProxyHolder() = default;
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explicit WindowProxyHolder(BrowsingContext* aBC) : mBrowsingContext(aBC) {
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MOZ_ASSERT(mBrowsingContext, "Don't set WindowProxyHolder to null.");
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}
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explicit WindowProxyHolder(already_AddRefed<BrowsingContext>&& aBC)
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: mBrowsingContext(std::move(aBC)) {
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MOZ_ASSERT(mBrowsingContext, "Don't set WindowProxyHolder to null.");
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}
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WindowProxyHolder& operator=(BrowsingContext* aBC) {
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mBrowsingContext = aBC;
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MOZ_ASSERT(mBrowsingContext, "Don't set WindowProxyHolder to null.");
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return *this;
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}
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WindowProxyHolder& operator=(already_AddRefed<BrowsingContext>&& aBC) {
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mBrowsingContext = std::move(aBC);
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MOZ_ASSERT(mBrowsingContext, "Don't set WindowProxyHolder to null.");
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return *this;
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}
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BrowsingContext* get() const {
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MOZ_ASSERT(mBrowsingContext, "WindowProxyHolder hasn't been initialized.");
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return mBrowsingContext;
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}
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private:
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friend void ImplCycleCollectionUnlink(WindowProxyHolder& aProxy);
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RefPtr<BrowsingContext> mBrowsingContext;
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};
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inline void ImplCycleCollectionTraverse(
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nsCycleCollectionTraversalCallback& aCallback, WindowProxyHolder& aProxy,
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const char* aName, uint32_t aFlags = 0) {
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CycleCollectionNoteChild(aCallback, aProxy.get(), "mBrowsingContext", aFlags);
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}
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inline void ImplCycleCollectionUnlink(WindowProxyHolder& aProxy) {
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aProxy.mBrowsingContext = nullptr;
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}
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extern bool GetRemoteOuterWindowProxy(JSContext* aCx, BrowsingContext* aContext,
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JS::Handle<JSObject*> aTransplantTo,
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JS::MutableHandle<JSObject*> aValue);
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} // namespace dom
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} // namespace mozilla
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#endif /* mozilla_dom_WindowProxyHolder_h__ */
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