| // Copyright 2015 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. |
| |
| #include "content/renderer/usb/web_usb_client_impl.h" |
| |
| #include "base/bind.h" |
| #include "base/callback.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/move.h" |
| #include "base/strings/utf_string_conversions.h" |
| #include "content/child/scoped_web_callbacks.h" |
| #include "content/renderer/usb/type_converters.h" |
| #include "content/renderer/usb/web_usb_device_impl.h" |
| #include "device/devices_app/public/cpp/constants.h" |
| #include "mojo/application/public/cpp/connect.h" |
| #include "mojo/application/public/interfaces/shell.mojom.h" |
| #include "third_party/WebKit/public/platform/WebCallbacks.h" |
| #include "third_party/WebKit/public/platform/WebPassOwnPtr.h" |
| #include "third_party/WebKit/public/platform/modules/webusb/WebUSBDeviceFilter.h" |
| #include "third_party/WebKit/public/platform/modules/webusb/WebUSBDeviceInfo.h" |
| #include "third_party/WebKit/public/platform/modules/webusb/WebUSBDeviceRequestOptions.h" |
| #include "third_party/WebKit/public/platform/modules/webusb/WebUSBError.h" |
| #include "third_party/mojo/src/mojo/public/cpp/bindings/array.h" |
| #include "third_party/mojo/src/mojo/public/cpp/bindings/interface_request.h" |
| |
| namespace content { |
| |
| namespace { |
| |
| const char kNoServiceError[] = "USB service unavailable."; |
| |
| // Generic default rejection handler for any WebUSB callbacks type. Assumes |
| // |CallbacksType| is a blink::WebCallbacks<T, const blink::WebUSBError&> |
| // for any type |T|. |
| template <typename CallbacksType> |
| void RejectCallbacksWithError(const blink::WebUSBError& error, |
| scoped_ptr<CallbacksType> callbacks) { |
| callbacks->onError(error); |
| } |
| |
| // Create a new ScopedWebCallbacks for WebUSB client callbacks, defaulting to |
| // a "no service" rejection. |
| template <typename CallbacksType> |
| ScopedWebCallbacks<CallbacksType> MakeScopedUSBCallbacks( |
| CallbacksType* callbacks) { |
| return make_scoped_web_callbacks( |
| callbacks, |
| base::Bind(&RejectCallbacksWithError<CallbacksType>, |
| blink::WebUSBError(blink::WebUSBError::Error::Service, |
| base::UTF8ToUTF16(kNoServiceError)))); |
| } |
| |
| void OnGetDevicesComplete( |
| ScopedWebCallbacks<blink::WebUSBClientGetDevicesCallbacks> scoped_callbacks, |
| mojo::ServiceProvider* device_services, |
| mojo::Array<device::usb::DeviceInfoPtr> results) { |
| blink::WebVector<blink::WebUSBDevice*>* devices = |
| new blink::WebVector<blink::WebUSBDevice*>(results.size()); |
| for (size_t i = 0; i < results.size(); ++i) { |
| device::usb::DeviceManagerPtr device_manager; |
| mojo::ConnectToService(device_services, &device_manager); |
| (*devices)[i] = new WebUSBDeviceImpl( |
| device_manager.Pass(), |
| mojo::ConvertTo<blink::WebUSBDeviceInfo>(results[i])); |
| } |
| scoped_callbacks.PassCallbacks()->onSuccess(blink::adoptWebPtr(devices)); |
| } |
| |
| } // namespace |
| |
| WebUSBClientImpl::WebUSBClientImpl(mojo::ServiceProviderPtr device_services) |
| : device_services_(device_services.Pass()) { |
| mojo::ConnectToService(device_services_.get(), &device_manager_); |
| } |
| |
| WebUSBClientImpl::~WebUSBClientImpl() {} |
| |
| void WebUSBClientImpl::getDevices( |
| blink::WebUSBClientGetDevicesCallbacks* callbacks) { |
| auto scoped_callbacks = MakeScopedUSBCallbacks(callbacks); |
| // TODO(rockot): Remove this once DeviceManager is updated. It should no |
| // longer take enumeration options. |
| device::usb::EnumerationOptionsPtr options = |
| device::usb::EnumerationOptions::New(); |
| options->filters = mojo::Array<device::usb::DeviceFilterPtr>::New(0); |
| device_manager_->GetDevices( |
| options.Pass(), |
| base::Bind(&OnGetDevicesComplete, base::Passed(&scoped_callbacks), |
| base::Unretained(device_services_.get()))); |
| } |
| |
| void WebUSBClientImpl::requestDevice( |
| const blink::WebUSBDeviceRequestOptions& options, |
| blink::WebUSBClientRequestDeviceCallbacks* callbacks) { |
| callbacks->onError(blink::WebUSBError(blink::WebUSBError::Error::Service, |
| base::UTF8ToUTF16("Not implemented."))); |
| delete callbacks; |
| } |
| |
| void WebUSBClientImpl::setObserver(Observer* observer) { |
| if (!observer_) { |
| // Set up two sequential calls to GetDeviceChanges to avoid latency. |
| device_manager_->GetDeviceChanges(base::Bind( |
| &WebUSBClientImpl::OnDeviceChangeNotification, base::Unretained(this))); |
| device_manager_->GetDeviceChanges(base::Bind( |
| &WebUSBClientImpl::OnDeviceChangeNotification, base::Unretained(this))); |
| } |
| |
| observer_ = observer; |
| } |
| |
| void WebUSBClientImpl::OnDeviceChangeNotification( |
| device::usb::DeviceChangeNotificationPtr notification) { |
| if (!observer_) |
| return; |
| |
| device_manager_->GetDeviceChanges(base::Bind( |
| &WebUSBClientImpl::OnDeviceChangeNotification, base::Unretained(this))); |
| for (size_t i = 0; i < notification->devices_added.size(); ++i) { |
| device::usb::DeviceManagerPtr device_manager; |
| mojo::ConnectToService(device_services_.get(), &device_manager); |
| observer_->onDeviceConnected(blink::adoptWebPtr(new WebUSBDeviceImpl( |
| device_manager.Pass(), mojo::ConvertTo<blink::WebUSBDeviceInfo>( |
| notification->devices_added[i])))); |
| } |
| for (size_t i = 0; i < notification->devices_removed.size(); ++i) { |
| device::usb::DeviceManagerPtr device_manager; |
| mojo::ConnectToService(device_services_.get(), &device_manager); |
| observer_->onDeviceDisconnected(blink::adoptWebPtr(new WebUSBDeviceImpl( |
| device_manager.Pass(), mojo::ConvertTo<blink::WebUSBDeviceInfo>( |
| notification->devices_removed[i])))); |
| } |
| } |
| |
| } // namespace content |