bluetooth: Move requestDevice to mojo

content/browser/bluetooth/bluetooth_adapter_factory_wrapper.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 "content/browser/bluetooth/bluetooth_adapter_factory_wrapper.h"
+
+#include <stddef.h>
+
+#include <utility>
+
+#include "base/thread_task_runner_handle.h"
+#include "content/public/browser/browser_thread.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+
+using device::BluetoothAdapter;
+using device::BluetoothAdapterFactory;
+
+namespace {
+// TODO(ortuno): Once we have a chooser for scanning and a way to control that
+// chooser from tests we should delete this constant.
+// https://crbug.com/436280
+enum { kTestingScanDuration = 0 };  // No need to wait when testing.
+enum { kScanDuration = 10 };
+}  // namespace
+
+namespace content {
+
+BluetoothAdapterFactoryWrapper::BluetoothAdapterFactoryWrapper()
+    : scan_duration_(kScanDuration), testing_(false), weak_ptr_factory_(this) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+}
+
+BluetoothAdapterFactoryWrapper::~BluetoothAdapterFactoryWrapper() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  // All observers should have been removed already.
+  DCHECK(adapter_observers_.empty());
+  // Clear adapter.
+  set_adapter(scoped_refptr<device::BluetoothAdapter>());
+}
+
+bool BluetoothAdapterFactoryWrapper::IsBluetoothAdapterAvailable() {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return BluetoothAdapterFactory::IsBluetoothAdapterAvailable() || testing_;
+}
+
+void BluetoothAdapterFactoryWrapper::AcquireAdapter(
+    device::BluetoothAdapter::Observer* observer,
+    const base::Closure& continuation) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  DCHECK(!GetAdapter(observer));
+
+  AddAdapterObserver(observer);
+  if (adapter_.get()) {
+    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, continuation);
+    return;
+  }
+
+  DCHECK(BluetoothAdapterFactory::IsBluetoothAdapterAvailable());
+  BluetoothAdapterFactory::GetAdapter(
+      base::Bind(&BluetoothAdapterFactoryWrapper::OnGetAdapter,
+                 weak_ptr_factory_.GetWeakPtr(), continuation));
+}
+
+void BluetoothAdapterFactoryWrapper::ReleaseAdapter(
+    device::BluetoothAdapter::Observer* observer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (!HasAdapter(observer)) {
+    return;
+  }
+  RemoveAdapterObserver(observer);
+  if (adapter_observers_.empty())
+    set_adapter(scoped_refptr<device::BluetoothAdapter>());
+}
+
+BluetoothAdapter* BluetoothAdapterFactoryWrapper::GetAdapter(
+    device::BluetoothAdapter::Observer* observer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (HasAdapter(observer)) {
+    return adapter_.get();
+  }
+  return nullptr;
+}
+
+void BluetoothAdapterFactoryWrapper::SetBluetoothAdapterForTesting(
+    scoped_refptr<device::BluetoothAdapter> mock_adapter) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  scan_duration_ = kTestingScanDuration;
+  testing_ = true;
+  set_adapter(std::move(mock_adapter));
+}
+
+void BluetoothAdapterFactoryWrapper::OnGetAdapter(
+    const base::Closure& continuation,
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  set_adapter(adapter);
+  continuation.Run();
+}
+
+bool BluetoothAdapterFactoryWrapper::HasAdapter(
+    device::BluetoothAdapter::Observer* observer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  return ContainsKey(adapter_observers_, observer);
+}
+
+void BluetoothAdapterFactoryWrapper::AddAdapterObserver(
+    device::BluetoothAdapter::Observer* observer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  auto iter = adapter_observers_.insert(observer);
+  DCHECK(iter.second);
+  if (adapter_) {
+    adapter_->AddObserver(observer);
+  }
+}
+
+void BluetoothAdapterFactoryWrapper::RemoveAdapterObserver(
+    device::BluetoothAdapter::Observer* observer) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  size_t removed = adapter_observers_.erase(observer);
+  DCHECK(removed);
+  if (adapter_) {
+    adapter_->RemoveObserver(observer);
+  }
+}
+
+void BluetoothAdapterFactoryWrapper::set_adapter(
+    scoped_refptr<device::BluetoothAdapter> adapter) {
+  DCHECK_CURRENTLY_ON(BrowserThread::UI);
+  if (adapter_.get()) {
+    for (device::BluetoothAdapter::Observer* observer : adapter_observers_) {
+      adapter_->RemoveObserver(observer);
+    }
+  }
+  adapter_ = adapter;
+  if (adapter_.get()) {
+    for (device::BluetoothAdapter::Observer* observer : adapter_observers_) {
+      adapter_->AddObserver(observer);
+    }
+  }
+}
+
+}  // namespace content