Implement WebBluetooth getDescriptor[s]

third_party/WebKit/public/platform/modules/bluetooth/web_bluetooth.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 blink.mojom;
 
 import "device/bluetooth/public/interfaces/uuid.mojom";
 
 // Result codes that can occur during Web Bluetooth execution, which are
 // transformed to a DOMException in Source/modules/bluetooth/BluetoothError.cpp.
@@ skipping 33 matching lines @@
   NO_BLUETOOTH_ADAPTER,
   CHOSEN_DEVICE_VANISHED,
   CHOOSER_CANCELLED,
   CHOOSER_NOT_SHOWN_API_GLOBALLY_DISABLED,
   CHOOSER_NOT_SHOWN_API_LOCALLY_DISABLED,
   CHOOSER_NOT_SHOWN_USER_DENIED_PERMISSION_TO_SCAN,
   SERVICE_NOT_FOUND,
   NO_SERVICES_FOUND,
   CHARACTERISTIC_NOT_FOUND,
   NO_CHARACTERISTICS_FOUND,
+  DESCRIPTOR_NOT_FOUND,
+  NO_DESCRIPTORS_FOUND,
   WEB_BLUETOOTH_NOT_SUPPORTED,
   BLUETOOTH_LOW_ENERGY_NOT_AVAILABLE,
   // NotSupportedError:
   GATT_UNKNOWN_ERROR,
   GATT_UNKNOWN_FAILURE,
   GATT_NOT_PERMITTED,
   GATT_NOT_SUPPORTED,
   GATT_UNTRANSLATED_ERROR_CODE,
   // SecurityError:
   GATT_NOT_AUTHORIZED,
+  BLOCKLISTED_DESCRIPTOR_UUID,
   BLOCKLISTED_CHARACTERISTIC_UUID,
   BLOCKLISTED_READ,
   BLOCKLISTED_WRITE,
   NOT_ALLOWED_TO_ACCESS_ANY_SERVICE,
   NOT_ALLOWED_TO_ACCESS_SERVICE,
   REQUEST_DEVICE_WITH_BLOCKLISTED_UUID,
   REQUEST_DEVICE_FROM_CROSS_ORIGIN_IFRAME,
   REQUEST_DEVICE_WITHOUT_FRAME,
 };
 
@@ skipping 29 matching lines @@
   string instance_id;
   string uuid;
 };
 
 struct WebBluetoothRemoteGATTCharacteristic {
   string instance_id;
   string uuid;
   uint32 properties;
 };
 
+struct WebBluetoothRemoteGATTDescriptor {
+  string instance_id;
+  string uuid;
+};
+
 // Web Bluetooth Interface that Blink can use to perform
 // Bluetooth GATT Operations on Bluetooth Devices.
 interface WebBluetoothService {
   // Sets the client for this WebBluetoothService. The service will notify the
   // client of device events e.g. when a Characteristic's value changes or when
   // a device disconnects.
   SetClient(associated WebBluetoothServiceClient client);
 
   RequestDevice(WebBluetoothRequestDeviceOptions options)
     => (WebBluetoothResult result, WebBluetoothDevice? device);
@@ skipping 49 matching lines @@
 
   // Starts notifications for the characteristic with
   // |characteristic_instance_id|.
   RemoteCharacteristicStartNotifications(
     string characteristic_instance_id) => (WebBluetoothResult result);
 
   // Stops notifications for the characteristic with
   // |characteristic_instance_id|.
   RemoteCharacteristicStopNotifications(
     string characteristic_instance_id) => ();
+
+  // Returns the Descriptors of a GATT Characteristic with |service_instance_id|.

[ortuno, 2016/12/08 05:42:52]

Ah sorry I missed it on the first go:

s/service_instance_id/characteristic_instance_id/

[dougt, 2016/12/08 08:35:59]

Done.

+  // If |quantity| == WebBluetoothGATTQueryQuantity::SINGLE, only one
+  // descriptor will be returned.
+  RemoteCharacteristicGetDescriptors(
+    string characteristics_instance_id,
+    WebBluetoothGATTQueryQuantity quantity,
+    bluetooth.mojom.UUID? descriptor_uuid) => (
+      WebBluetoothResult result,
+      array<WebBluetoothRemoteGATTDescriptor>? descriptors);
 };
 
 // Classes should implement this interface and pass an associated pointer
 // bound to them to the WebBluetoothService by using SetClient. Classes
 // that do this will be notified of device events e.g. device disconnection.
 interface WebBluetoothServiceClient {
   RemoteCharacteristicValueChanged(string characteristic_instance_id,
                                    array<uint8> value);
   GattServerDisconnected(WebBluetoothDeviceId device_id);
 };