EventDispatcher.h - mozsearch

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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;

  void Shutdown() MOZ_REQUIRES(sMainThreadCapability);

  java::EventDispatcher::WeakRef mDispatcher

      MOZ_GUARDED_BY(sMainThreadCapability);

};

}  // namespace mozilla::widget

#endif  // mozilla_widget_EventDispatcher_h