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| 1 // Copyright 2014 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 "config.h" | |
| 6 #include "core/frame/DeviceEventControllerBase.h" | |
| 7 | |
| 8 #include "core/page/Page.h" | |
| 9 | |
| 10 namespace blink { | |
| 11 | |
| 12 DeviceEventControllerBase::DeviceEventControllerBase(Page* page) | |
| 13 : PageLifecycleObserver(page) | |
| 14 , m_hasEventListener(false) | |
| 15 , m_isActive(false) | |
| 16 , m_timer(this, &DeviceEventControllerBase::oneShotCallback) | |
| 17 { | |
| 18 } | |
| 19 | |
| 20 DeviceEventControllerBase::~DeviceEventControllerBase() | |
| 21 { | |
| 22 } | |
| 23 | |
| 24 void DeviceEventControllerBase::oneShotCallback(Timer<DeviceEventControllerBase>
* timer) | |
| 25 { | |
| 26 ASSERT_UNUSED(timer, timer == &m_timer); | |
| 27 ASSERT(hasLastData()); | |
| 28 ASSERT(!m_timer.isActive()); | |
| 29 | |
| 30 didUpdateData(); | |
| 31 } | |
| 32 | |
| 33 void DeviceEventControllerBase::startUpdating() | |
| 34 { | |
| 35 if (m_isActive) | |
| 36 return; | |
| 37 | |
| 38 if (hasLastData() && !m_timer.isActive()) { | |
| 39 // Make sure to fire the data as soon as possible. | |
| 40 m_timer.startOneShot(0, FROM_HERE); | |
| 41 } | |
| 42 | |
| 43 registerWithDispatcher(); | |
| 44 m_isActive = true; | |
| 45 } | |
| 46 | |
| 47 void DeviceEventControllerBase::stopUpdating() | |
| 48 { | |
| 49 if (!m_isActive) | |
| 50 return; | |
| 51 | |
| 52 if (m_timer.isActive()) | |
| 53 m_timer.stop(); | |
| 54 | |
| 55 unregisterWithDispatcher(); | |
| 56 m_isActive = false; | |
| 57 } | |
| 58 | |
| 59 void DeviceEventControllerBase::pageVisibilityChanged() | |
| 60 { | |
| 61 if (!m_hasEventListener) | |
| 62 return; | |
| 63 | |
| 64 if (page()->visibilityState() == PageVisibilityStateVisible) | |
| 65 startUpdating(); | |
| 66 else | |
| 67 stopUpdating(); | |
| 68 } | |
| 69 | |
| 70 } // namespace blink | |
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Chromium Code Reviews
Issue 417213002:
Introduce PlatformEvent to handle Device events, Battery events and Gamepad events. (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master