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// Copyright 2019 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_BROWSER_HID_HID_SERVICE_H_
#define CONTENT_BROWSER_HID_HID_SERVICE_H_
#include <memory>
#include <string>
#include <vector>
#include "base/memory/weak_ptr.h"
#include "base/uuid.h"
#include "content/browser/renderer_host/render_frame_host_impl.h"
#include "content/browser/service_worker/service_worker_version.h"
#include "content/public/browser/hid_delegate.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver_set.h"
#include "mojo/public/cpp/bindings/remote_set.h"
#include "services/device/public/mojom/hid.mojom.h"
#include "third_party/blink/public/mojom/hid/hid.mojom.h"
#include "url/origin.h"
namespace content {
class HidChooser;
// HidService provides an implementation of the HidService mojom interface. This
// interface is used by Blink to implement the WebHID API.
class CONTENT_EXPORT HidService : public blink::mojom::HidService,
public device::mojom::HidConnectionWatcher,
public HidDelegate::Observer {
public:
explicit HidService(RenderFrameHostImpl*);
HidService(base::WeakPtr<ServiceWorkerVersion>, const url::Origin&);
HidService(HidService&) = delete;
HidService& operator=(HidService&) = delete;
~HidService() override;
// Use this when creating from a document.
static void Create(RenderFrameHostImpl*,
mojo::PendingReceiver<blink::mojom::HidService>);
// Use this when creating from a service worker, which doesn't have
// RenderFrameHost.
static void Create(base::WeakPtr<ServiceWorkerVersion>,
const url::Origin&,
mojo::PendingReceiver<blink::mojom::HidService>);
// Removes reports from `device` if the report IDs match the IDs in the
// protected report ID lists. If all of the reports are removed from a
// collection, the collection is also removed. If `is_fido_allowed` is true,
// reports contained in FIDO collections are not removed. If
// both `is_fido_allowed` and `is_known_security_key` are true, no reports are
// removed.
static void RemoveProtectedReports(device::mojom::HidDeviceInfo& device,
bool is_known_security_key,
bool is_fido_allowed);
// blink::mojom::HidService:
void RegisterClient(
mojo::PendingAssociatedRemote<device::mojom::HidManagerClient> client)
override;
void GetDevices(GetDevicesCallback callback) override;
void RequestDevice(
std::vector<blink::mojom::HidDeviceFilterPtr> filters,
std::vector<blink::mojom::HidDeviceFilterPtr> exclusion_filters,
RequestDeviceCallback callback) override;
void Connect(const std::string& device_guid,
mojo::PendingRemote<device::mojom::HidConnectionClient> client,
ConnectCallback callback) override;
void Forget(device::mojom::HidDeviceInfoPtr device_info,
ForgetCallback callback) override;
// HidDelegate::Observer:
void OnDeviceAdded(const device::mojom::HidDeviceInfo& device_info) override;
void OnDeviceRemoved(
const device::mojom::HidDeviceInfo& device_info) override;
void OnDeviceChanged(
const device::mojom::HidDeviceInfo& device_info) override;
void OnHidManagerConnectionError() override;
void OnPermissionRevoked(const url::Origin& origin) override;
const mojo::AssociatedRemoteSet<device::mojom::HidManagerClient>& clients()
const {
return clients_;
}
base::WeakPtr<content::ServiceWorkerVersion> service_worker_version() {
return service_worker_version_;
}
const mojo::ReceiverSet<device::mojom::HidConnectionWatcher>&
GetWatchersForTesting() {
return watchers_;
}
private:
HidService(RenderFrameHostImpl* render_frame_host,
base::WeakPtr<ServiceWorkerVersion> service_worker_version,
const url::Origin& origin);
void OnWatcherRemoved(bool cleanup_watcher_ids, size_t watchers_removed);
// Increment the activity reference count of the associated frame or service
// worker.
void IncrementActivityCount();
// Decrement the activity reference count of the associated frame or service
// worker.
void DecrementActivityCount();
void FinishGetDevices(GetDevicesCallback callback,
std::vector<device::mojom::HidDeviceInfoPtr> devices);
void FinishRequestDevice(
RequestDeviceCallback callback,
std::vector<device::mojom::HidDeviceInfoPtr> devices);
void FinishConnect(
ConnectCallback callback,
mojo::PendingRemote<device::mojom::HidConnection> connection);
// Get the BrowserContext this HidService belongs to. It returns nullptr if
// the BrowserContext is destroyed.
BrowserContext* GetBrowserContext();
// When RenderFrameHost pointed by |render_frame_host| is destroyed, the
// bound HidService will be destroyed first. It should be safe to access
// |render_frame_host_| whenever it is not null.
const raw_ptr<RenderFrameHostImpl> render_frame_host_;
// The ServiceWorkerVersion of the service worker this HidService belongs
// to.
const base::WeakPtr<content::ServiceWorkerVersion> service_worker_version_;
// The request uuid for keeping service worker alive.
std::optional<base::Uuid> service_worker_activity_request_uuid_;
// The last shown HID chooser UI.
std::unique_ptr<HidChooser> chooser_;
url::Origin origin_;
// Used to bind with Blink.
mojo::AssociatedRemoteSet<device::mojom::HidManagerClient> clients_;
// Each pipe here watches a connection created by Connect() in order to notify
// the WebContentsImpl when an active connection indicator should be shown.
mojo::ReceiverSet<device::mojom::HidConnectionWatcher> watchers_;
// Maps every receiver to a guid to allow closing particular connections when
// the user revokes a permission.
std::multimap<std::string, mojo::ReceiverId> watcher_ids_;
// Prevent the document from going into an inactive state while the service is
// active.
RenderFrameHostImpl::BackForwardCacheDisablingFeatureHandle
back_forward_cache_feature_handle_;
base::WeakPtrFactory<HidService> weak_factory_{this};
};
} // namespace content
#endif // CONTENT_BROWSER_HID_HID_SERVICE_H_
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