1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set expandtab shiftwidth=2 tabstop=2: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CacheConstants.h"
#include "nsAccessibilityService.h"
namespace mozilla::a11y {
// Get the set of cache domains required by the given cache domains, which will
// always be equal to or a superset of the given set of cache domains.
static uint64_t GetCacheDomainSuperset(uint64_t aCacheDomains) {
uint64_t allNecessaryDomains = aCacheDomains;
if (aCacheDomains & CacheDomain::TextOffsetAttributes) {
allNecessaryDomains |= CacheDomain::Text;
}
if (aCacheDomains & CacheDomain::TextBounds) {
allNecessaryDomains |= CacheDomain::Text;
allNecessaryDomains |= CacheDomain::Bounds;
}
MOZ_ASSERT((allNecessaryDomains & aCacheDomains) == aCacheDomains,
"Return value is not a superset of the input.");
return allNecessaryDomains;
}
bool DomainsAreActive(uint64_t aRequiredCacheDomains) {
const uint64_t activeCacheDomains =
nsAccessibilityService::GetActiveCacheDomains();
const bool allRequiredDomainsAreActive =
(aRequiredCacheDomains & ~activeCacheDomains) == 0;
return allRequiredDomainsAreActive;
}
bool RequestDomainsIfInactive(uint64_t aRequiredCacheDomains) {
nsAccessibilityService* accService = GetAccService();
if (!accService) {
return true;
}
const uint64_t activeCacheDomains =
nsAccessibilityService::GetActiveCacheDomains();
const bool isMissingRequiredCacheDomain =
(aRequiredCacheDomains & ~activeCacheDomains) != 0;
if (isMissingRequiredCacheDomain) {
if (!accService->ShouldAllowNewCacheDomains()) {
// Return true to indicate that the domain is not active, but don't
// actually request it.
return true;
}
aRequiredCacheDomains = GetCacheDomainSuperset(aRequiredCacheDomains);
const uint64_t cacheDomains = aRequiredCacheDomains | activeCacheDomains;
#if defined(ANDROID)
// We might not be on the main Android thread, but we must be in order to
// send IPDL messages. Dispatch to the main thread to set cache domains.
NS_DispatchToMainThread(
NS_NewRunnableFunction("a11y::SetCacheDomains", [cacheDomains]() {
if (nsAccessibilityService* accService = GetAccService()) {
accService->SetCacheDomains(cacheDomains);
}
}));
#else
accService->SetCacheDomains(cacheDomains);
#endif
return true;
}
return false;
}
} // namespace mozilla::a11y
|
