forked from mirrors/gecko-dev
66f053ebc4
* Having `AndroidView` and `GeckoViewSupport` as nested classes inside of `nsWindow` make it impossible to forward declare them. We move those classes into their own headers. We also move `WindowEvent` into its own header. * We remove the old `NativePtr` and `WindowPtr` implementations from `nsWindow` and convert the class definitions in this patch to use the new `NativeWeakPtr`. * `GeckoViewSupport` had a unique quirk where it was owned by `nsWindow` instead of its Java counterpart. To make `GeckoViewSupport`'s ownership work like the other classes that use `NativeWeakPtr` (and to substantially simplify the implementation of `NativeWeakPtr` itself), I have reversed that: now `nsWindow` holds a `NativeWeakPtr` to `GeckoViewSupport`, while `GeckoViewSupport` is owned by its Java counterpart and holds a strong ref to the `nsWindow`. * `GeckoViewSupport` no longer inherits from `SupportsWeakPtr`, since using it with `NativeWeakPtr` provides stronger and safer guarantees. Differential Revision: https://phabricator.services.mozilla.com/D87362
57 lines
1.7 KiB
C++
57 lines
1.7 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_widget_WindowEvent_h
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#define mozilla_widget_WindowEvent_h
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#include "nsThreadUtils.h"
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#include "mozilla/jni/Natives.h"
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namespace mozilla {
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namespace widget {
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// An Event subclass that guards against stale events.
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// (See the implmentation of mozilla::jni::detail::ProxyNativeCall for info
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// about the default template parameters for this class)
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template <typename Lambda, bool IsStatic = Lambda::isStatic,
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typename InstanceType = typename Lambda::ThisArgType,
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class Impl = typename Lambda::TargetClass>
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class WindowEvent : public Runnable {
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bool IsStaleCall() {
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if (IsStatic) {
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// Static calls are never stale.
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return false;
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}
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return jni::NativePtrTraits<Impl>::IsStale(mInstance);
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}
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Lambda mLambda;
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const InstanceType mInstance;
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public:
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WindowEvent(Lambda&& aLambda, InstanceType&& aInstance)
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: Runnable("mozilla::widget::WindowEvent"),
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mLambda(std::move(aLambda)),
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mInstance(std::forward<InstanceType>(aInstance)) {}
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explicit WindowEvent(Lambda&& aLambda)
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: Runnable("mozilla::widget::WindowEvent"),
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mLambda(std::move(aLambda)),
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mInstance(mLambda.GetThisArg()) {}
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NS_IMETHOD Run() override {
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if (!IsStaleCall()) {
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mLambda();
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}
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return NS_OK;
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}
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};
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} // namespace widget
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} // namespace mozilla
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#endif // mozilla_widget_WindowEvent_h
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