third_party/WebKit/Source/modules/xr/XR.h

// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef XR_h
#define XR_h

#include "bindings/core/v8/ScriptPromise.h"
#include "core/dom/ContextLifecycleObserver.h"
#include "core/dom/events/EventTarget.h"
#include "device/vr/public/mojom/vr_service.mojom-blink.h"
#include "mojo/public/cpp/bindings/binding.h"
#include "platform/heap/Handle.h"
#include "platform/wtf/Forward.h"
#include "public/platform/WebCallbacks.h"

namespace blink {

class ScriptPromiseResolver;
class XRDevice;

class XR final : public EventTargetWithInlineData,
                 public ContextLifecycleObserver,
                 public device::mojom::blink::VRServiceClient {
  DEFINE_WRAPPERTYPEINFO();
  USING_GARBAGE_COLLECTED_MIXIN(XR);

 public:
  static XR* Create(LocalFrame& frame) { return new XR(frame); }

  DEFINE_ATTRIBUTE_EVENT_LISTENER(devicechange);

  ScriptPromise requestDevice(ScriptState*);

  // XRServiceClient overrides.
  void OnDisplayConnected(device::mojom::blink::VRMagicWindowProviderPtr,
                          device::mojom::blink::VRDisplayHostPtr,
                          device::mojom::blink::VRDisplayClientRequest,
                          device::mojom::blink::VRDisplayInfoPtr) override;

  // EventTarget overrides.
  ExecutionContext* GetExecutionContext() const override;
  const AtomicString& InterfaceName() const override;

  // ContextLifecycleObserver overrides.
  void ContextDestroyed(ExecutionContext*) override;

  void Dispose();

  void Trace(blink::Visitor*) override;

 private:
  explicit XR(LocalFrame& frame);

  void OnDevicesSynced();
  void ResolveRequestDevice();

  bool devices_synced_;

  HeapVector<Member<XRDevice>> devices_;
  Member<ScriptPromiseResolver> pending_devices_resolver_;
  device::mojom::blink::VRServicePtr service_;
  mojo::Binding<device::mojom::blink::VRServiceClient> binding_;
};

}  // namespace blink

#endif  // XR_h