content/common/gamepad_user_gesture.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/common/gamepad_user_gesture.h"
   6
   7 #include <algorithm>
   8
   9 #include "third_party/WebKit/public/platform/WebGamepads.h"
  10
  11 namespace content {
  12
  13 bool GamepadsHaveUserGesture(const blink::WebGamepads& gamepads) {
  14   for (unsigned i = 0; i < blink::WebGamepads::itemsLengthCap; i++) {
  15     const blink::WebGamepad& pad = gamepads.items[i];
  16
  17     // If the device is physically connected, then check the primary 4 buttons
  18     // to see if there is currently an intentional user action.
  19     if (pad.connected) {
  20       const unsigned kPrimaryInteractionButtons = 4;
  21       unsigned buttons_to_check = std::min(pad.buttonsLength,
  22                                            kPrimaryInteractionButtons);
  23       for (unsigned button_index = 0; button_index < buttons_to_check;
  24            button_index++) {
  25         if (pad.buttons[button_index] > 0.5f)
  26           return true;
  27       }
  28     }
  29   }
  30   return false;
  31 }
  32
  33 }  // namespace content