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77 lines
2.4 KiB
Plaintext
77 lines
2.4 KiB
Plaintext
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module device.mojom;
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enum HidBusType {
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kHIDBusTypeUSB = 0,
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kHIDBusTypeBluetooth = 1,
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};
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struct HidUsageAndPage {
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uint16 usage;
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uint16 usage_page;
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};
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struct HidCollectionInfo {
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HidUsageAndPage usage;
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array<int32> report_ids;
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};
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struct HidDeviceInfo {
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string guid;
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uint16 vendor_id;
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uint16 product_id;
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string product_name;
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string serial_number;
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HidBusType bus_type;
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array<uint8> report_descriptor;
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array<HidCollectionInfo> collections;
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bool has_report_id;
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uint64 max_input_report_size;
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uint64 max_output_report_size;
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uint64 max_feature_report_size;
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string device_node;
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};
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interface HidManagerClient {
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// Notifies the client that a device is added.
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DeviceAdded(HidDeviceInfo device_info);
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// Notifies the client that a device is being removed, called before
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// removing the device from HidService.
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DeviceRemoved(HidDeviceInfo device_info);
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};
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interface HidManager {
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// Enumerates available devices and set as a client of HidManager.
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// The implementation of HidManager guarantees that the returned callback
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// will always be posted earlier than DeviceAdded() and DeviceRemoved().
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GetDevicesAndSetClient(associated HidManagerClient client) =>
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(array<HidDeviceInfo> devices);
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// Enumerates available devices only.
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GetDevices() => (array<HidDeviceInfo> devices);
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// Opens a connection to a device by given guid. The callback will be run
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// with null on failure.
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Connect(string device_guid) => (HidConnection? connection);
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};
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interface HidConnection {
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// The report_id is returned as 0 if not supported by the device.
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Read() => (bool success, uint8 report_id, array<uint8>? buffer);
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// Pass the report_id as 0 if not supported by the device.
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Write(uint8 report_id, array<uint8> buffer) => (bool success);
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// The buffer will contain whatever report data was received from the device.
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// This may include the report ID. The report ID is not stripped because a
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// device may respond with other data in place of the report ID.
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GetFeatureReport(uint8 report_id) => (bool success, array<uint8>? buffer);
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// Pass the report_id as 0 if not supported by the device.
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SendFeatureReport(uint8 report_id, array<uint8> buffer) => (bool success);
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};
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