HID: Support top-level collection usages in device info.

device/hid/hid_usage_and_page.h

+// Copyright 2014 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_HID_HID_USAGE_AND_PAGE_H_
+#define DEVICE_HID_HID_USAGE_AND_PAGE_H_
+
+#include "base/basictypes.h"
+
+namespace device {
+
+struct HidUsageAndPage {
+  enum Page {
+    kPageUndefined = 0x00,
+    kPageGenericDesktop = 0x01,
+    kPageSimulation = 0x02,
+    kPageVirtualReality = 0x03,
+    kPageSport = 0x04,
+    kPageGame = 0x05,
+    kPageKeyboard = 0x07,
+    kPageLed = 0x08,
+    kPageButton = 0x09,
+    kPageOrdinal = 0x0A,
+    kPageTelephony = 0x0B,
+    kPageConsumer = 0x0C,
+    kPageDigitizer = 0x0D,
+    kPagePidPage = 0x0F,
+    kPageUnicode = 0x10,
+    kPageAlphanumericDisplay = 0x14,
+    kPageMedicalInstruments = 0x40,
+    kPageMonitor0 = 0x80,
+    kPageMonitor1 = 0x81,
+    kPageMonitor2 = 0x82,
+    kPageMonitor3 = 0x83,
+    kPagePower0 = 0x84,
+    kPagePower1 = 0x85,
+    kPagePower2 = 0x86,
+    kPagePower3 = 0x87,
+    kPageBarCodeScanner = 0x8C,
+    kPageScale = 0x8D,
+    kPageMagneticStripeReader = 0x8E,
+    kPageReservedPointOfSale = 0x8F,
+    kPageCameraControl = 0x90,
+    kPageArcade = 0x91,
+    kPageVendor = 0xFF00,
+    kPageMediaCenter = 0xFFBC
+  };
+
+  HidUsageAndPage(uint16_t usage, Page usage_page)
+      : usage(usage), usage_page(usage_page) {}
+  ~HidUsageAndPage() {}
+
+  uint16_t usage;
+  Page usage_page;
+
+  bool operator==(const HidUsageAndPage& other) const;
+};
+
+}  // namespace device
+
+#endif  // DEVICE_HID_HID_USAGE_AND_PAGE_H_