bluetooth: Add device list retrieval for chrome://bluetooth-internals

device/bluetooth/adapter.cc

+// Copyright 2016 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 <string>
+#include <utility>
+#include <vector>
+
+#include "base/memory/ptr_util.h"
+#include "base/strings/utf_string_conversions.h"
+#include "device/bluetooth/adapter.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "mojo/public/cpp/bindings/string.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace bluetooth {
+
+Adapter::Adapter() : client_(nullptr), weak_ptr_factory_(this) {}
+
+Adapter::~Adapter() {
+  if (adapter_.get()) {

[dcheng, 2016/09/30 07:04:06]

Nit: no .get() here and elsewhere

[mbrunson, 2016/09/30 22:28:42]

Done.

+    adapter_->RemoveObserver(this);
+    adapter_ = nullptr;
+  }
+}
+
+// static
+void Adapter::Create(mojom::AdapterRequest request) {
+  mojo::MakeStrongBinding(base::MakeUnique<Adapter>(), std::move(request));
+}
+
+void Adapter::GetDevices(const GetDevicesCallback& callback) {
+  if (!adapter_.get()) {
+    if (device::BluetoothAdapterFactory::IsBluetoothAdapterAvailable()) {
+      base::Closure c = base::Bind(&Adapter::GetDevicesImpl,
+                                   weak_ptr_factory_.GetWeakPtr(), callback);
+
+      device::BluetoothAdapterFactory::GetAdapter(base::Bind(
+          &Adapter::OnGetAdapter, weak_ptr_factory_.GetWeakPtr(), c));

[dcheng, 2016/09/30 07:04:06]

Three layer deep callback wrapping, fun.

+      return;
+    }
+    callback.Run(std::vector<mojom::DeviceInfoPtr>());
+    return;
+  }
+  GetDevicesImpl(callback);
+}
+
+void Adapter::SetClient(mojom::AdapterClientPtr client) {
+  client_ = std::move(client);
+}
+
+void Adapter::DeviceAdded(device::BluetoothAdapter* adapter,
+                          device::BluetoothDevice* device) {
+  if (client_) {
+    auto device_info = ConstructDeviceInfoStruct(device);
+    client_->DeviceAdded(std::move(device_info));
+  }
+}
+
+void Adapter::DeviceRemoved(device::BluetoothAdapter* adapter,
+                            device::BluetoothDevice* device) {
+  if (client_) {
+    auto device_info = ConstructDeviceInfoStruct(device);
+    client_->DeviceRemoved(std::move(device_info));
+  }
+}
+
+mojom::DeviceInfoPtr Adapter::ConstructDeviceInfoStruct(
+    const device::BluetoothDevice* device) const {
+  mojom::DeviceInfoPtr device_info = mojom::DeviceInfo::New();
+
+  device_info->name = device->GetName();
+  device_info->name_for_display =
+      base::UTF16ToUTF8(device->GetNameForDisplay());
+  device_info->id = device->GetIdentifier();
+  device_info->address = device->GetAddress();
+
+  return device_info;
+}
+
+void Adapter::GetDevicesImpl(const GetDevicesCallback& callback) {
+  std::vector<mojom::DeviceInfoPtr> devices;
+
+  for (const device::BluetoothDevice* device : adapter_->GetDevices()) {
+    mojom::DeviceInfoPtr device_info = ConstructDeviceInfoStruct(device);
+    devices.push_back(std::move(device_info));
+  }
+
+  callback.Run(std::move(devices));
+}
+
+void Adapter::OnGetAdapter(const base::Closure& continuation,
+                           scoped_refptr<device::BluetoothAdapter> adapter) {
+  if (!adapter_.get()) {
+    VLOG(1) << "Adapter acquired";
+    adapter_ = adapter;
+    adapter_->AddObserver(this);
+  }
+  continuation.Run();
+}
+
+}  // namespace bluetooth