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
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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 "Compatibility.h"
#include "nsWinUtils.h"
#include "Statistics.h"
#include "mozilla/Preferences.h"
using namespace mozilla;
using namespace mozilla::a11y;
/**
* Return true if module version is lesser than the given version.
*/
bool
IsModuleVersionLessThan(HMODULE aModuleHandle, DWORD aMajor, DWORD aMinor)
{
wchar_t fileName[MAX_PATH];
::GetModuleFileNameW(aModuleHandle, fileName, MAX_PATH);
DWORD dummy = 0;
DWORD length = ::GetFileVersionInfoSizeW(fileName, &dummy);
LPBYTE versionInfo = new BYTE[length];
::GetFileVersionInfoW(fileName, 0, length, versionInfo);
UINT uLen;
VS_FIXEDFILEINFO* fixedFileInfo = nullptr;
::VerQueryValueW(versionInfo, L"\\", (LPVOID*)&fixedFileInfo, &uLen);
DWORD dwFileVersionMS = fixedFileInfo->dwFileVersionMS;
DWORD dwFileVersionLS = fixedFileInfo->dwFileVersionLS;
delete [] versionInfo;
DWORD dwLeftMost = HIWORD(dwFileVersionMS);
DWORD dwSecondRight = HIWORD(dwFileVersionLS);
return (dwLeftMost < aMajor ||
(dwLeftMost == aMajor && dwSecondRight < aMinor));
}
////////////////////////////////////////////////////////////////////////////////
// Compatibility
////////////////////////////////////////////////////////////////////////////////
uint32_t Compatibility::sConsumers = Compatibility::UNKNOWN;
void
Compatibility::Init()
{
// Note we collect some AT statistics/telemetry here for convenience.
HMODULE jawsHandle = ::GetModuleHandleW(L"jhook");
if (jawsHandle)
sConsumers |= (IsModuleVersionLessThan(jawsHandle, 8, 2173)) ?
OLDJAWS : JAWS;
if (::GetModuleHandleW(L"gwm32inc"))
sConsumers |= WE;
if (::GetModuleHandleW(L"dolwinhk"))
sConsumers |= DOLPHIN;
if (::GetModuleHandleW(L"STSA32"))
sConsumers |= SEROTEK;
if (::GetModuleHandleW(L"nvdaHelperRemote"))
sConsumers |= NVDA;
if (::GetModuleHandleW(L"OsmHooks"))
sConsumers |= COBRA;
if (::GetModuleHandleW(L"WebFinderRemote"))
sConsumers |= ZOOMTEXT;
if (::GetModuleHandleW(L"Kazahook"))
sConsumers |= KAZAGURU;
if (::GetModuleHandleW(L"TextExtractorImpl32") ||
::GetModuleHandleW(L"TextExtractorImpl64"))
sConsumers |= YOUDAO;
if (::GetModuleHandleW(L"uiautomation") ||
::GetModuleHandleW(L"uiautomationcore"))
sConsumers |= UIAUTOMATION;
// If we have a known consumer remove the unknown bit.
if (sConsumers != Compatibility::UNKNOWN)
sConsumers ^= Compatibility::UNKNOWN;
// Gather telemetry
uint32_t temp = sConsumers;
for (int i = 0; temp; i++) {
if (temp & 0x1)
statistics::A11yConsumers(i);
temp >>= 1;
}
// Turn off new tab switching for Jaws and WE.
if (sConsumers & (JAWS | OLDJAWS | WE)) {
// Check to see if the pref for disallowing CtrlTab is already set. If so,
// bail out (respect the user settings). If not, set it.
if (!Preferences::HasUserValue("browser.ctrlTab.disallowForScreenReaders"))
Preferences::SetBool("browser.ctrlTab.disallowForScreenReaders", true);
}
}
|
