/src/mozilla-central/gfx/layers/apz/util/ScrollLinkedEffectDetector.cpp
Line | Count | Source (jump to first uncovered line) |
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 |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #include "ScrollLinkedEffectDetector.h" |
8 | | |
9 | | #include "nsIDocument.h" |
10 | | #include "nsThreadUtils.h" |
11 | | |
12 | | namespace mozilla { |
13 | | namespace layers { |
14 | | |
15 | | uint32_t ScrollLinkedEffectDetector::sDepth = 0; |
16 | | bool ScrollLinkedEffectDetector::sFoundScrollLinkedEffect = false; |
17 | | |
18 | | /* static */ void |
19 | | ScrollLinkedEffectDetector::PositioningPropertyMutated() |
20 | 0 | { |
21 | 0 | MOZ_ASSERT(NS_IsMainThread()); |
22 | 0 |
|
23 | 0 | if (sDepth > 0) { |
24 | 0 | // We are inside a scroll event dispatch |
25 | 0 | sFoundScrollLinkedEffect = true; |
26 | 0 | } |
27 | 0 | } |
28 | | |
29 | | ScrollLinkedEffectDetector::ScrollLinkedEffectDetector(nsIDocument* aDoc) |
30 | | : mDocument(aDoc) |
31 | 0 | { |
32 | 0 | MOZ_ASSERT(NS_IsMainThread()); |
33 | 0 | sDepth++; |
34 | 0 | } |
35 | | |
36 | | ScrollLinkedEffectDetector::~ScrollLinkedEffectDetector() |
37 | 0 | { |
38 | 0 | sDepth--; |
39 | 0 | if (sDepth == 0) { |
40 | 0 | // We have exited all (possibly-nested) scroll event dispatches, |
41 | 0 | // record whether or not we found an effect, and reset state |
42 | 0 | if (sFoundScrollLinkedEffect) { |
43 | 0 | mDocument->ReportHasScrollLinkedEffect(); |
44 | 0 | sFoundScrollLinkedEffect = false; |
45 | 0 | } |
46 | 0 | } |
47 | 0 | } |
48 | | |
49 | | } // namespace layers |
50 | | } // namespace mozilla |