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

Changes WebUI setup to a MojoWebUI for chrome://bluetooth-internals page.
Adds mojom files for Bluetooth service definition and internals page handler.
Adds basic Bluetooth device retrieval using starter Bluetooth service
implementation for logging on web front end.
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation
BUG=651282

Review-Url: https://codereview.chromium.org/2357383002
Cr-Commit-Position: refs/heads/master@{#422570}

chrome/browser/BUILD.gn

@@ -1403,6 +1403,7 @@ split_static_library("browser") {
     "//courgette:courgette_lib",
     "//crypto",
     "//crypto:platform",
+    "//device/bluetooth:mojo",
     "//device/core",
     "//device/usb/mojo",
     "//device/usb/public/interfaces",
@@ -3962,6 +3963,7 @@ grit("resources") {
     "//chrome/browser/ui/webui/omnibox:mojo_bindings__generator",
     "//chrome/browser/ui/webui/plugins:mojo_bindings__generator",
     "//chrome/browser/ui/webui/usb_internals:mojo_bindings__generator",
+    "//device/bluetooth/public/interfaces:experimental_interfaces__generator",
     "//url/mojo:url_mojom_gurl__generator",
     "//url/mojo:url_mojom_origin__generator",
   ]

chrome/browser/browser_resources.grd

@@ -94,6 +94,7 @@
       <include name="IDR_BLUETOOTH_INTERNALS_CSS" file="resources\bluetooth_internals\bluetooth_internals.css" type="BINDATA" />
       <include name="IDR_BLUETOOTH_INTERNALS_HTML" file="resources\bluetooth_internals\bluetooth_internals.html" flattenhtml="true" allowexternalscript="true" type="BINDATA" />
       <include name="IDR_BLUETOOTH_INTERNALS_JS" file="resources\bluetooth_internals\bluetooth_internals.js" type="BINDATA" />
+      <include name="IDR_BLUETOOTH_MOJO_JS" file="${root_gen_dir}\device\bluetooth\public\interfaces\adapter.mojom.js" use_base_dir="false" type="BINDATA"/>
       <include name="IDR_BOOKMARKS_MANIFEST" file="resources\bookmark_manager\manifest.json" type="BINDATA" />
       <if expr="is_posix and not is_macosx and not is_ios">
         <include name="IDR_CERTIFICATE_VIEWER_HTML" file="resources\certificate_viewer.html" type="BINDATA" />

chrome/browser/chrome_content_browser_client.cc

@@ -169,6 +169,8 @@
 #include "content/public/common/service_names.h"
 #include "content/public/common/url_utils.h"
 #include "content/public/common/web_preferences.h"
+#include "device/bluetooth/adapter.h"
+#include "device/bluetooth/public/interfaces/adapter.mojom.h"
 #include "device/usb/public/interfaces/chooser_service.mojom.h"
 #include "device/usb/public/interfaces/device_manager.mojom.h"
 #include "gin/v8_initializer.h"
@@ -2963,6 +2965,9 @@ void ChromeContentBrowserClient::RegisterRenderFrameMojoInterfaces(
         base::Bind(&CreateWebUsbChooserService, render_frame_host));
   }
 
+  registry->AddInterface<bluetooth::mojom::Adapter>(
+      base::Bind(&bluetooth::Adapter::Create));
+
   if (!render_frame_host->GetParent()) {
     // Register mojo CredentialManager interface only for main frame.
     registry->AddInterface(

chrome/browser/resources/bluetooth_internals/bluetooth_internals.js

@@ -7,6 +7,82 @@
  *     chrome://bluetooth-internals/.
  */
 
-document.addEventListener('DOMContentLoaded', function() {
-  console.log('Welcome to Bluetooth Internals.');
-});
+/**
+ * The implementation of AdapterClient in
+ *     device/bluetooth/public/interfaces/adapter.mojom.
+ */
+var AdapterClient = function() {};
+AdapterClient.prototype = {
+  /**
+   * Prints added device to console.
+   * @param {!Object} device the device that was added
+   */
+  deviceAdded: function(device) {
+    console.log('Device added');
+    console.log(device);
+  },
+
+  /**
+   * Prints removed device to console.
+   * @param {!Object} device the device that was removed
+   */
+  deviceRemoved: function(device) {
+    console.log('Device removed');
+    console.log(device);
+  }
+};
+
+(function() {
+  var adapter = null;
+  var adapterClient = null;
+  var adapterClientHandle = null;
+
+  /**
+   * TODO: Move to shared location. See crbug.com/652361.
+   * Helper to convert callback-based define() API to a promise-based API.
+   * @param {!Array<string>} moduleNames
+   * @return {!Promise}
+   */
+  function importModules(moduleNames) {
+    return new Promise(function(resolve, reject) {
+      define(moduleNames, function(var_args) {
+        resolve(Array.prototype.slice.call(arguments, 0));
+      });
+    });
+  }
+
+  /**
+   * Initializes Mojo proxies for page and Bluetooth services.
+   * @return {!Promise}
+   */
+  function initializeProxies() {
+    return importModules([
+      'content/public/renderer/frame_interfaces',
+      'device/bluetooth/public/interfaces/adapter.mojom',
+      'mojo/public/js/connection',
+    ]).then(function([frameInterfaces, bluetoothAdapter, connection]) {
+      console.log('Loaded modules');
+
+      // Hook up the instance properties.
+      AdapterClient.prototype.__proto__ =
+          bluetoothAdapter.AdapterClient.stubClass.prototype;
+
+      // Create a message pipe and bind one end to client
+      // implementation.
+      adapterClient = new AdapterClient();
+      adapterClientHandle = connection.bindStubDerivedImpl(adapterClient);
+
+      adapter = connection.bindHandleToProxy(
+          frameInterfaces.getInterface(bluetoothAdapter.Adapter.name),
+          bluetoothAdapter.Adapter);
+
+      adapter.setClient(adapterClientHandle);
+    });
+  }
+
+  document.addEventListener('DOMContentLoaded', function() {
+    initializeProxies()
+      .then(function() { return adapter.getDevices(); })
+      .then(function(response) { console.log(response.devices); });
+  });
+})();

chrome/browser/ui/BUILD.gn

@@ -560,6 +560,7 @@ split_static_library("ui") {
     "//content/app/resources",
     "//content/public/common",
     "//crypto",
+    "//device/bluetooth/public/interfaces:experimental_interfaces",
     "//device/core",
     "//device/usb",
     "//media",

chrome/browser/ui/webui/bluetooth_internals/bluetooth_internals_ui.cc

@@ -20,6 +20,9 @@ BluetoothInternalsUI::BluetoothInternalsUI(content::WebUI* web_ui)
                                IDR_BLUETOOTH_INTERNALS_CSS);
   html_source->AddResourcePath("bluetooth_internals.js",
                                IDR_BLUETOOTH_INTERNALS_JS);
+  html_source->AddResourcePath(
+      "device/bluetooth/public/interfaces/adapter.mojom",
+      IDR_BLUETOOTH_MOJO_JS);
   html_source->SetDefaultResource(IDR_BLUETOOTH_INTERNALS_HTML);
 
   Profile* profile = Profile::FromWebUI(web_ui);

device/bluetooth/BUILD.gn

@@ -20,6 +20,18 @@ config("bluetooth_config") {
   }
 }
 
+source_set("mojo") {
+  sources = [
+    "adapter.cc",
+    "adapter.h",
+  ]
+
+  public_deps = [
+    ":bluetooth",
+    "//device/bluetooth/public/interfaces:experimental_interfaces",
+  ]
+}
+
 component("bluetooth") {
   sources = [
     "android/bluetooth_jni_registrar.cc",

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_) {
+    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_) {
+    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));
+      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_) {
+    VLOG(1) << "Adapter acquired";
+    adapter_ = adapter;
+    adapter_->AddObserver(this);
+  }
+  continuation.Run();
+}
+
+}  // namespace bluetooth

device/bluetooth/adapter.h

+// 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.
+
+#ifndef DEVICE_BLUETOOTH_ADAPTER_H_
+#define DEVICE_BLUETOOTH_ADAPTER_H_
+
+#include "base/macros.h"
+#include "device/bluetooth/bluetooth_adapter.h"
+#include "device/bluetooth/public/interfaces/adapter.mojom.h"
+
+namespace bluetooth {
+
+// Implementation of Mojo BluetoothAdapter located in
+// device/bluetooth/public/interfaces/bluetooth.mojom.
+// It handles requests for Bluetooth adapter capabilities
+// and devices and uses the platform abstraction of device/bluetooth.
+class Adapter : public mojom::Adapter,
+                public device::BluetoothAdapter::Observer {
+ public:
+  Adapter();
+  ~Adapter() override;
+
+  // Creates an Adapter with a strong Mojo binding to |request|
+  static void Create(mojom::AdapterRequest request);
+
+  // mojom::Adapter overrides:
+  void GetDevices(const GetDevicesCallback& callback) override;
+  void SetClient(mojom::AdapterClientPtr client) override;
+
+  // device::BluetoothAdapter::Observer overrides:
+  void DeviceAdded(device::BluetoothAdapter* adapter,
+                   device::BluetoothDevice* device) override;
+  void DeviceRemoved(device::BluetoothAdapter* adapter,
+                     device::BluetoothDevice* device) override;
+
+ private:
+  mojom::DeviceInfoPtr ConstructDeviceInfoStruct(
+      const device::BluetoothDevice* device) const;
+
+  void GetDevicesImpl(const GetDevicesCallback& callback);
+
+  void OnGetAdapter(const base::Closure& continuation,
+                    scoped_refptr<device::BluetoothAdapter> adapter);
+  // The current Bluetooth adapter.
+  scoped_refptr<device::BluetoothAdapter> adapter_;
+
+  // The adapter client that listens to this service.
+  mojom::AdapterClientPtr client_;
+
+  base::WeakPtrFactory<Adapter> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(Adapter);
+};
+
+}  // namespace bluetooth
+
+#endif  // DEVICE_BLUETOOTH_ADAPTER_H_

device/bluetooth/public/interfaces/BUILD.gn

@@ -4,10 +4,22 @@
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
-mojom("bluetooth_mojom_bluetooth_uuid") {
+mojom("interfaces") {
   sources = [
     "uuid.mojom",
   ]
 
   use_new_wrapper_types = false
 }
+
+mojom("experimental_interfaces") {
+  sources = [
+    "adapter.mojom",
+  ]
+
+  visibility = [
+    "//device/bluetooth:mojo",
+    "//chrome/browser:browser",
+    "//chrome/browser/ui:ui",
+  ]
+}

device/bluetooth/public/interfaces/adapter.mojom

+// 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.
+
+module bluetooth.mojom;
+
+struct DeviceInfo {
+  string? name;
+  string name_for_display;
+  string id;
+  string address;
+};
+
+interface Adapter {
+  // Retrieves the list of the devices known by the adapter including Connected
+  // Devices, GATT Connected Devices, Paired Devices and Devices discovered
+  // during a classic or low-energy scan.
+  GetDevices() => (array<DeviceInfo> devices);
+
+  // Sets the client that listens for the adapter's events.
+  SetClient(AdapterClient client);
+};
+
+interface AdapterClient {
+  // Called the first time a device is discovered.
+  DeviceAdded(DeviceInfo device);
+
+  // Called after the device hasn't been seen for 3 minutes.
+  DeviceRemoved(DeviceInfo device);
+};

third_party/WebKit/public/BUILD.gn

@@ -644,7 +644,7 @@ mojom("mojo_bindings") {
   public_deps = [
     ":android_mojo_bindings",
     ":new_wrapper_types_mojo_bindings",
-    "//device/bluetooth/public/interfaces:bluetooth_mojom_bluetooth_uuid",
+    "//device/bluetooth/public/interfaces",
     "//mojo/common:common_custom_types",
     "//url/mojo:url_mojom_origin",
   ]