Cast extension private API for ChromeOS system tray.

chrome/browser/extensions/api/cast_devices_private/cast_devices_private_api.cc

+// 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 "chrome/browser/extensions/api/cast_devices_private/cast_devices_private_api.h"
+
+#include "base/lazy_instance.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/common/extensions/api/cast_devices_private.h"
+
+namespace extensions {
+
+namespace {
+
+ash::CastConfigDelegate::Receiver ConvertReceiverType(
+    const api::cast_devices_private::Receiver& receiver) {
+  ash::CastConfigDelegate::Receiver result;
+  result.id = receiver.id;
+  result.name = base::UTF8ToUTF16(receiver.name);
+  return result;
+}
+
+ash::CastConfigDelegate::Activity ConvertActivityType(
+    const api::cast_devices_private::Activity& activity) {
+  ash::CastConfigDelegate::Activity result;
+  result.id = activity.id;
+  result.title = base::UTF8ToUTF16(activity.title);
+  result.tab_id = activity.tab_id;
+  return result;
+}
+
+ash::CastConfigDelegate::ReceiverAndActivity ConvertReceiverAndActivityType(
+    const api::cast_devices_private::Receiver& receiver,
+    const api::cast_devices_private::Activity* activity) {
+  ash::CastConfigDelegate::ReceiverAndActivity result;
+  result.receiver = ConvertReceiverType(receiver);
+  if (activity)
+    result.activity = ConvertActivityType(*activity);
+  return result;
+}
+
+}  // namespace
+
+static base::LazyInstance<
+    BrowserContextKeyedAPIFactory<CastDeviceUpdateListeners>> g_factory =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+BrowserContextKeyedAPIFactory<CastDeviceUpdateListeners>*
+CastDeviceUpdateListeners::GetFactoryInstance() {
+  return g_factory.Pointer();
+}
+
+// static
+CastDeviceUpdateListeners* CastDeviceUpdateListeners::Get(
+    content::BrowserContext* context) {
+  return BrowserContextKeyedAPIFactory<CastDeviceUpdateListeners>::Get(context);
+}
+
+CastDeviceUpdateListeners::CastDeviceUpdateListeners(
+    content::BrowserContext* context) {}
+
+CastDeviceUpdateListeners::~CastDeviceUpdateListeners() {}
+
+ash::CastConfigDelegate::DeviceUpdateSubscription
+CastDeviceUpdateListeners::RegisterCallback(
+    const ash::CastConfigDelegate::ReceiversAndActivitesCallback& callback) {
+  return callback_list_.Add(callback);
+}
+
+void CastDeviceUpdateListeners::NotifyCallbacks(
+    const CastDeviceUpdateListeners::ReceiverAndActivityList& devices) {

[achuithb, 2015/08/18 22:30:14]

Do you actually need CastDeviceUpdateListeners:: in the function argument?

[jdufault, 2015/08/18 23:31:52]

Done.

+  callback_list_.Notify(devices);
+}
+
+CastDevicesPrivateUpdateDevicesFunction::
+    CastDevicesPrivateUpdateDevicesFunction() {}
+
+CastDevicesPrivateUpdateDevicesFunction::
+    ~CastDevicesPrivateUpdateDevicesFunction() {}
+
+ExtensionFunction::ResponseAction
+CastDevicesPrivateUpdateDevicesFunction::Run() {
+  auto params =
+      api::cast_devices_private::UpdateDevices::Params::Create(*args_);
+
+  CastDeviceUpdateListeners::ReceiverAndActivityList devices;
+  for (linked_ptr<api::cast_devices_private::ReceiverActivity> device :
+       params->devices) {
+    devices.push_back(ConvertReceiverAndActivityType(device->receiver,
+                                                     device->activity.get()));
+  }
+
+  auto storage = CastDeviceUpdateListeners::Get(browser_context());

[achuithb, 2015/08/18 22:30:14]

why storage instead of say listeners?

[jdufault, 2015/08/18 23:31:51]

Done.

+  storage->NotifyCallbacks(devices);
+
+  return RespondNow(NoArguments());
+}
+
+}  // namespace extensions