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1 // Copyright 2015 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/dom/IntersectionObserverController.h" | |
7 | |
8 #include "core/dom/Document.h" | |
9 | |
10 namespace blink { | |
11 | |
12 typedef HeapVector<Member<IntersectionObserver>> IntersectionObserverVector; | |
13 | |
14 IntersectionObserverController::IntersectionObserverController() | |
15 : m_timer(this, &IntersectionObserverController::deliverIntersectionObservat ions) | |
16 { | |
17 } | |
18 | |
19 void IntersectionObserverController::scheduleIntersectionObserverForDelivery(Int ersectionObserver& observer) | |
20 { | |
21 // TODO: use idle callback with a timeout | |
esprehn
2015/12/17 01:40:29
ditto for adding your name
szager1
2015/12/17 20:27:26
Done, here and elsewhere.
| |
22 if (m_activeIntersectionObservers.isEmpty()) | |
23 m_timer.startOneShot(0, BLINK_FROM_HERE); | |
24 m_activeIntersectionObservers.add(&observer); | |
25 } | |
26 | |
27 void IntersectionObserverController::resumeSuspendedIntersectionObservers() | |
28 { | |
29 ASSERT(isMainThread()); | |
30 if (m_suspendedIntersectionObservers.isEmpty()) | |
31 return; | |
32 | |
33 IntersectionObserverVector suspended; | |
34 copyToVector(m_suspendedIntersectionObservers, suspended); | |
35 for (auto& observer : suspended) { | |
36 if (!observer->shouldBeSuspended()) { | |
37 m_suspendedIntersectionObservers.remove(observer); | |
38 scheduleIntersectionObserverForDelivery(*observer); | |
39 } | |
40 } | |
41 } | |
42 | |
43 void IntersectionObserverController::deliverIntersectionObservations(Timer<Inter sectionObserverController>*) | |
44 { | |
45 IntersectionObserverVector observers; | |
46 copyToVector(m_activeIntersectionObservers, observers); | |
47 m_activeIntersectionObservers.clear(); | |
48 for (auto& observer : observers) { | |
49 if (observer->shouldBeSuspended()) | |
50 m_suspendedIntersectionObservers.add(observer); | |
51 else | |
52 observer->deliver(); | |
53 } | |
54 } | |
55 | |
56 void IntersectionObserverController::computeTrackedIntersectionObservations() | |
57 { | |
58 // TODO: Need to define timestamp. | |
esprehn
2015/12/17 01:40:29
ditto
| |
59 double timestamp = currentTime(); | |
60 for (auto& observer : m_trackedIntersectionObservers) | |
61 observer->computeIntersectionObservations(timestamp); | |
62 } | |
63 | |
64 void IntersectionObserverController::addTrackedObserver(IntersectionObserver& ob server) | |
65 { | |
66 m_trackedIntersectionObservers.add(&observer); | |
67 } | |
68 | |
69 void IntersectionObserverController::removeTrackedObserversForRoot(Element& root ) | |
70 { | |
71 HeapVector<Member<IntersectionObserver>> toRemove; | |
72 for (auto& observer : m_trackedIntersectionObservers) { | |
73 if (observer->root() == &root) | |
74 toRemove.append(observer); | |
75 } | |
76 for (auto& observer : toRemove) | |
77 m_trackedIntersectionObservers.remove(observer); | |
78 } | |
79 | |
80 void IntersectionObserverController::dispose() | |
81 { | |
82 m_timer.stop(); | |
83 m_trackedIntersectionObservers.clear(); | |
84 m_activeIntersectionObservers.clear(); | |
85 m_suspendedIntersectionObservers.clear(); | |
86 } | |
87 | |
88 DEFINE_TRACE(IntersectionObserverController) | |
89 { | |
90 visitor->trace(m_trackedIntersectionObservers); | |
91 visitor->trace(m_activeIntersectionObservers); | |
92 visitor->trace(m_suspendedIntersectionObservers); | |
93 } | |
94 | |
95 } // namespace blink { | |
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