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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/dom/IntersectionObserverController.h" | 5 #include "core/dom/IntersectionObserverController.h" |
6 | 6 |
7 #include "core/dom/Document.h" | 7 #include "core/dom/Document.h" |
8 #include "core/dom/TaskRunnerHelper.h" | 8 #include "core/dom/TaskRunnerHelper.h" |
9 #include "platform/TraceEvent.h" | 9 #include "platform/TraceEvent.h" |
10 | 10 |
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23 : ActiveDOMObject(document), | 23 : ActiveDOMObject(document), |
24 m_weakPtrFactory(this), | 24 m_weakPtrFactory(this), |
25 m_callbackFiredWhileSuspended(false) {} | 25 m_callbackFiredWhileSuspended(false) {} |
26 | 26 |
27 IntersectionObserverController::~IntersectionObserverController() {} | 27 IntersectionObserverController::~IntersectionObserverController() {} |
28 | 28 |
29 void IntersectionObserverController::scheduleIntersectionObserverForDelivery( | 29 void IntersectionObserverController::scheduleIntersectionObserverForDelivery( |
30 IntersectionObserver& observer) { | 30 IntersectionObserver& observer) { |
31 m_pendingIntersectionObservers.add(&observer); | 31 m_pendingIntersectionObservers.add(&observer); |
32 if (!m_weakPtrFactory.hasWeakPtrs()) { | 32 if (!m_weakPtrFactory.hasWeakPtrs()) { |
33 // TODO(ojan): These tasks decide whether to throttle a subframe, so they ne
ed to | 33 // TODO(ojan): These tasks decide whether to throttle a subframe, so they |
34 // be unthrottled, but we should throttle all the other tasks (e.g. ones com
ing from | 34 // need to be unthrottled, but we should throttle all the other tasks |
35 // the web page). | 35 // (e.g. ones coming from the web page). |
36 TaskRunnerHelper::get(TaskType::Unthrottled, getExecutionContext()) | 36 TaskRunnerHelper::get(TaskType::Unthrottled, getExecutionContext()) |
37 ->postTask(BLINK_FROM_HERE, | 37 ->postTask(BLINK_FROM_HERE, |
38 WTF::bind(&IntersectionObserverController:: | 38 WTF::bind(&IntersectionObserverController:: |
39 deliverIntersectionObservations, | 39 deliverIntersectionObservations, |
40 m_weakPtrFactory.createWeakPtr())); | 40 m_weakPtrFactory.createWeakPtr())); |
41 } | 41 } |
42 } | 42 } |
43 | 43 |
44 void IntersectionObserverController::resume() { | 44 void IntersectionObserverController::resume() { |
45 // If the callback fired while DOM objects were suspended, notifications might
be late, so deliver | 45 // If the callback fired while DOM objects were suspended, notifications might |
46 // them right away (rather than waiting to fire again). | 46 // be late, so deliver them right away (rather than waiting to fire again). |
47 if (m_callbackFiredWhileSuspended) { | 47 if (m_callbackFiredWhileSuspended) { |
48 m_callbackFiredWhileSuspended = false; | 48 m_callbackFiredWhileSuspended = false; |
49 deliverIntersectionObservations(); | 49 deliverIntersectionObservations(); |
50 } | 50 } |
51 } | 51 } |
52 | 52 |
53 void IntersectionObserverController::deliverIntersectionObservations() { | 53 void IntersectionObserverController::deliverIntersectionObservations() { |
54 ExecutionContext* context = getExecutionContext(); | 54 ExecutionContext* context = getExecutionContext(); |
55 if (!context) { | 55 if (!context) { |
56 m_pendingIntersectionObservers.clear(); | 56 m_pendingIntersectionObservers.clear(); |
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92 m_trackedIntersectionObservers.removeAll(toRemove); | 92 m_trackedIntersectionObservers.removeAll(toRemove); |
93 } | 93 } |
94 | 94 |
95 DEFINE_TRACE(IntersectionObserverController) { | 95 DEFINE_TRACE(IntersectionObserverController) { |
96 visitor->trace(m_trackedIntersectionObservers); | 96 visitor->trace(m_trackedIntersectionObservers); |
97 visitor->trace(m_pendingIntersectionObservers); | 97 visitor->trace(m_pendingIntersectionObservers); |
98 ActiveDOMObject::trace(visitor); | 98 ActiveDOMObject::trace(visitor); |
99 } | 99 } |
100 | 100 |
101 } // namespace blink | 101 } // namespace blink |
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