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content / public / browser / xr_runtime_manager.h [blame]
// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_PUBLIC_BROWSER_XR_RUNTIME_MANAGER_H_
#define CONTENT_PUBLIC_BROWSER_XR_RUNTIME_MANAGER_H_
#include "base/functional/callback_forward.h"
#include "base/observer_list_types.h"
#include "content/common/content_export.h"
#include "device/vr/public/mojom/vr_service.mojom-forward.h"
#include "device/vr/public/mojom/xr_device.mojom-forward.h"
namespace content {
class BrowserXRRuntime;
// The XRRuntimeManager is a singleton responsible for managing access to the
// active BrowserXRRuntime instances. An Observer interface is provided in case
// runtimes need to interact with runtimes when they are added (e.g. to notify
// them of any current state that they may need to know about).
class CONTENT_EXPORT XRRuntimeManager {
public:
class Observer : public base::CheckedObserver {
public:
virtual void OnRuntimeAdded(content::BrowserXRRuntime* runtime) {}
};
// Provides access to the XRRuntimeManager singleton, if it exists.
// This method does not extend the lifetime of the singleton, so you should be
// careful with the lifetime of this reference.
static content::XRRuntimeManager* GetInstanceIfCreated();
// Exits any currently presenting immersive session.
static void ExitImmersivePresentation();
// Observer registration methods are static so that observers may subscribe
// and unsubscribe independent of the lifecycle of the XRRuntimeManager
// Singleton.
static void AddObserver(content::XRRuntimeManager::Observer* observer);
static void RemoveObserver(content::XRRuntimeManager::Observer* observer);
XRRuntimeManager() = default;
virtual ~XRRuntimeManager() = default;
XRRuntimeManager(const XRRuntimeManager&) = delete;
XRRuntimeManager& operator=(const XRRuntimeManager&) = delete;
// Provides access to the BrowserXRRuntime corresponding to the given
// XRDeviceId, or nullptr if no such device exists/has been registered.
virtual content::BrowserXRRuntime* GetRuntime(
device::mojom::XRDeviceId id) = 0;
};
} // namespace content
#endif // CONTENT_PUBLIC_BROWSER_XR_RUNTIME_MANAGER_H_