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/* -*- Mode: c++; c-basic-offset: 2; tab-width: 20; indent-tabs-mode: nil; -*-
* vim: set sw=2 ts=4 expandtab:
* 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 mozilla_widget_EventDispatcher_h
#define mozilla_widget_EventDispatcher_h
#include "mozilla/java/EventDispatcherNatives.h"
#include "mozilla/widget/EventDispatcherBase.h"
namespace mozilla::widget {
/**
* EventDispatcher is the Gecko counterpart to the Java EventDispatcher class.
* Together, they make up a unified event bus. Events dispatched from the Java
* side may notify event listeners on the Gecko side, and vice versa.
*/
class EventDispatcher final
: public EventDispatcherBase,
public java::EventDispatcher::Natives<EventDispatcher> {
using NativesBase = java::EventDispatcher::Natives<EventDispatcher>;
public:
void Attach(java::EventDispatcher::Param aDispatcher);
void Detach();
void Activate();
using EventDispatcherBase::HasGeckoListener;
bool HasGeckoListener(jni::String::Param aEvent) {
return EventDispatcherBase::HasGeckoListener(aEvent->ToString());
}
using EventDispatcherBase::DispatchToGecko;
void DispatchToGecko(jni::String::Param aEvent, jni::Object::Param aData,
jni::Object::Param aCallback);
bool HasEmbedderListener(const nsAString& aEvent) override
MOZ_REQUIRES(sMainThreadCapability);
nsresult DispatchToEmbedder(JSContext* aCx, const nsAString& aEvent,
JS::Handle<JS::Value> aData,
nsIGeckoViewEventCallback* aCallback) override
MOZ_REQUIRES(sMainThreadCapability);
static nsresult UnboxBundle(JSContext* aCx, jni::Object::Param aData,
JS::MutableHandle<JS::Value> aOut);
private:
friend class java::EventDispatcher::Natives<EventDispatcher>;
virtual ~EventDispatcher() = default;
// NOTE: Can be called from any thread.
void Shutdown() { mIsShutdown = true; };
// Gets a LocalRef to the dispatcher. Returns `nullptr` if `mIsShutdown` has
// been set (e.g. by the Java code).
java::EventDispatcher::LocalRef GetDispatcher()
MOZ_REQUIRES(sMainThreadCapability) {
return mIsShutdown ? nullptr : mDispatcher;
}
std::atomic<bool> mIsShutdown{false};
java::EventDispatcher::WeakRef mDispatcher
MOZ_GUARDED_BY(sMainThreadCapability);
};
} // namespace mozilla::widget
#endif // mozilla_widget_EventDispatcher_h
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