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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 | 8 |
9 namespace blink { | 9 namespace blink { |
10 | 10 |
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21 : ActiveDOMObject(document) | 21 : ActiveDOMObject(document) |
22 , m_timer(this, &IntersectionObserverController::deliverIntersectionObservat
ions) | 22 , m_timer(this, &IntersectionObserverController::deliverIntersectionObservat
ions) |
23 , m_timerFiredWhileSuspended(false) | 23 , m_timerFiredWhileSuspended(false) |
24 { | 24 { |
25 } | 25 } |
26 | 26 |
27 IntersectionObserverController::~IntersectionObserverController() { } | 27 IntersectionObserverController::~IntersectionObserverController() { } |
28 | 28 |
29 void IntersectionObserverController::scheduleIntersectionObserverForDelivery(Int
ersectionObserver& observer) | 29 void IntersectionObserverController::scheduleIntersectionObserverForDelivery(Int
ersectionObserver& observer) |
30 { | 30 { |
31 // TODO(szager): use idle callback with a timeout | 31 // TODO(szager): use idle callback with a timeout. Until we do that, there
is no |
| 32 // reliable way to write a test for takeRecords, because it's impossible to
guarantee |
| 33 // that javascript will get a chance to run before the timer fires. |
32 if (!m_timer.isActive()) | 34 if (!m_timer.isActive()) |
33 m_timer.startOneShot(0, BLINK_FROM_HERE); | 35 m_timer.startOneShot(0, BLINK_FROM_HERE); |
34 m_pendingIntersectionObservers.add(&observer); | 36 m_pendingIntersectionObservers.add(&observer); |
35 } | 37 } |
36 | 38 |
37 void IntersectionObserverController::resume() | 39 void IntersectionObserverController::resume() |
38 { | 40 { |
39 // If the timer fired while DOM objects were suspended, notifications might
be late, so deliver | 41 // If the timer fired while DOM objects were suspended, notifications might
be late, so deliver |
40 // them right away (rather than waiting for m_timer to fire again). | 42 // them right away (rather than waiting for m_timer to fire again). |
41 if (m_timerFiredWhileSuspended) { | 43 if (m_timerFiredWhileSuspended) { |
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84 } | 86 } |
85 | 87 |
86 DEFINE_TRACE(IntersectionObserverController) | 88 DEFINE_TRACE(IntersectionObserverController) |
87 { | 89 { |
88 visitor->trace(m_trackedIntersectionObservers); | 90 visitor->trace(m_trackedIntersectionObservers); |
89 visitor->trace(m_pendingIntersectionObservers); | 91 visitor->trace(m_pendingIntersectionObservers); |
90 ActiveDOMObject::trace(visitor); | 92 ActiveDOMObject::trace(visitor); |
91 } | 93 } |
92 | 94 |
93 } // namespace blink | 95 } // namespace blink |
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