dom/gamepad/GamepadHapticActuator.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/GamepadHapticActuator.h"
   8 #include "mozilla/dom/GamepadManager.h"
   9 #include "mozilla/dom/Promise.h"
  10
  11 namespace mozilla::dom {
  12
  13 NS_IMPL_CYCLE_COLLECTING_ADDREF(GamepadHapticActuator)
  14 NS_IMPL_CYCLE_COLLECTING_RELEASE(GamepadHapticActuator)
  15
  16 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(GamepadHapticActuator)
  17   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  18   NS_INTERFACE_MAP_ENTRY(nsISupports)
  19 NS_INTERFACE_MAP_END
  20
  21 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(GamepadHapticActuator, mParent)
  22
  23 GamepadHapticActuator::GamepadHapticActuator(nsISupports* aParent,
  24                                              GamepadHandle aGamepadHandle,
  25                                              uint32_t aIndex)
  26     : mParent(aParent),
  27       mGamepadHandle(aGamepadHandle),
  28       mType(GamepadHapticActuatorType::Vibration),
  29       mIndex(aIndex) {}
  30
  31 /* virtual */
  32 JSObject* GamepadHapticActuator::WrapObject(JSContext* aCx,
  33                                             JS::Handle<JSObject*> aGivenProto) {
  34   return GamepadHapticActuator_Binding::Wrap(aCx, this, aGivenProto);
  35 }
  36
  37 nsISupports* GamepadHapticActuator::GetParentObject() const { return mParent; }
  38
  39 #define CLAMP(f, min, max) (((f) < min) ? min : (((f) > max) ? max : (f)))
  40
  41 already_AddRefed<Promise> GamepadHapticActuator::Pulse(double aValue,
  42                                                        double aDuration,
  43                                                        ErrorResult& aRv) {
  44   nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(GetParentObject());
  45   MOZ_ASSERT(global);
  46
  47   RefPtr<GamepadManager> gamepadManager(GamepadManager::GetService());
  48   MOZ_ASSERT(gamepadManager);
  49
  50   // Clamp intensity aValue to be 0~1.
  51   double value = CLAMP(aValue, 0, 1);
  52   // aDuration should be always positive.
  53   double duration = CLAMP(aDuration, 0, aDuration);
  54
  55   switch (mType) {
  56     case GamepadHapticActuatorType::Vibration: {
  57       RefPtr<Promise> promise = gamepadManager->VibrateHaptic(
  58           mGamepadHandle, mIndex, value, duration, global, aRv);
  59       if (!promise) {
  60         return nullptr;
  61       }
  62       return promise.forget();
  63     }
  64     default: {
  65       // We need to implement other types of haptic
  66       MOZ_ASSERT(false);
  67       return nullptr;
  68     }
  69   }
  70 }
  71
  72 GamepadHapticActuatorType GamepadHapticActuator::Type() const { return mType; }
  73
  74 void GamepadHapticActuator::Set(const GamepadHapticActuator* aOther) {
  75   mGamepadHandle = aOther->mGamepadHandle;
  76   mType = aOther->mType;
  77   mIndex = aOther->mIndex;
  78 }
  79
  80 }  // namespace mozilla::dom