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comparison: accessible/src/windows/msaa/Compatibility.cpp
accessible/src/windows/msaa/Compatibility.cpp
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=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 "Compatibility.h" | |
| 8 | |
| 9 #include "nsWinUtils.h" | |
| 10 #include "Statistics.h" | |
| 11 | |
| 12 #include "mozilla/Preferences.h" | |
| 13 | |
| 14 using namespace mozilla; | |
| 15 using namespace mozilla::a11y; | |
| 16 | |
| 17 /** | |
| 18 * Return true if module version is lesser than the given version. | |
| 19 */ | |
| 20 bool | |
| 21 IsModuleVersionLessThan(HMODULE aModuleHandle, DWORD aMajor, DWORD aMinor) | |
| 22 { | |
| 23 wchar_t fileName[MAX_PATH]; | |
| 24 ::GetModuleFileNameW(aModuleHandle, fileName, MAX_PATH); | |
| 25 | |
| 26 DWORD dummy = 0; | |
| 27 DWORD length = ::GetFileVersionInfoSizeW(fileName, &dummy); | |
| 28 | |
| 29 LPBYTE versionInfo = new BYTE[length]; | |
| 30 ::GetFileVersionInfoW(fileName, 0, length, versionInfo); | |
| 31 | |
| 32 UINT uLen; | |
| 33 VS_FIXEDFILEINFO* fixedFileInfo = nullptr; | |
| 34 ::VerQueryValueW(versionInfo, L"\\", (LPVOID*)&fixedFileInfo, &uLen); | |
| 35 DWORD dwFileVersionMS = fixedFileInfo->dwFileVersionMS; | |
| 36 DWORD dwFileVersionLS = fixedFileInfo->dwFileVersionLS; | |
| 37 delete [] versionInfo; | |
| 38 | |
| 39 DWORD dwLeftMost = HIWORD(dwFileVersionMS); | |
| 40 DWORD dwSecondRight = HIWORD(dwFileVersionLS); | |
| 41 return (dwLeftMost < aMajor || | |
| 42 (dwLeftMost == aMajor && dwSecondRight < aMinor)); | |
| 43 } | |
| 44 | |
| 45 | |
| 46 //////////////////////////////////////////////////////////////////////////////// | |
| 47 // Compatibility | |
| 48 //////////////////////////////////////////////////////////////////////////////// | |
| 49 | |
| 50 uint32_t Compatibility::sConsumers = Compatibility::UNKNOWN; | |
| 51 | |
| 52 void | |
| 53 Compatibility::Init() | |
| 54 { | |
| 55 // Note we collect some AT statistics/telemetry here for convenience. | |
| 56 | |
| 57 HMODULE jawsHandle = ::GetModuleHandleW(L"jhook"); | |
| 58 if (jawsHandle) | |
| 59 sConsumers |= (IsModuleVersionLessThan(jawsHandle, 8, 2173)) ? | |
| 60 OLDJAWS : JAWS; | |
| 61 | |
| 62 if (::GetModuleHandleW(L"gwm32inc")) | |
| 63 sConsumers |= WE; | |
| 64 | |
| 65 if (::GetModuleHandleW(L"dolwinhk")) | |
| 66 sConsumers |= DOLPHIN; | |
| 67 | |
| 68 if (::GetModuleHandleW(L"STSA32")) | |
| 69 sConsumers |= SEROTEK; | |
| 70 | |
| 71 if (::GetModuleHandleW(L"nvdaHelperRemote")) | |
| 72 sConsumers |= NVDA; | |
| 73 | |
| 74 if (::GetModuleHandleW(L"OsmHooks")) | |
| 75 sConsumers |= COBRA; | |
| 76 | |
| 77 if (::GetModuleHandleW(L"WebFinderRemote")) | |
| 78 sConsumers |= ZOOMTEXT; | |
| 79 | |
| 80 if (::GetModuleHandleW(L"Kazahook")) | |
| 81 sConsumers |= KAZAGURU; | |
| 82 | |
| 83 if (::GetModuleHandleW(L"TextExtractorImpl32") || | |
| 84 ::GetModuleHandleW(L"TextExtractorImpl64")) | |
| 85 sConsumers |= YOUDAO; | |
| 86 | |
| 87 if (::GetModuleHandleW(L"uiautomation") || | |
| 88 ::GetModuleHandleW(L"uiautomationcore")) | |
| 89 sConsumers |= UIAUTOMATION; | |
| 90 | |
| 91 // If we have a known consumer remove the unknown bit. | |
| 92 if (sConsumers != Compatibility::UNKNOWN) | |
| 93 sConsumers ^= Compatibility::UNKNOWN; | |
| 94 | |
| 95 // Gather telemetry | |
| 96 uint32_t temp = sConsumers; | |
| 97 for (int i = 0; temp; i++) { | |
| 98 if (temp & 0x1) | |
| 99 statistics::A11yConsumers(i); | |
| 100 | |
| 101 temp >>= 1; | |
| 102 } | |
| 103 | |
| 104 // Turn off new tab switching for Jaws and WE. | |
| 105 if (sConsumers & (JAWS | OLDJAWS | WE)) { | |
| 106 // Check to see if the pref for disallowing CtrlTab is already set. If so, | |
| 107 // bail out (respect the user settings). If not, set it. | |
| 108 if (!Preferences::HasUserValue("browser.ctrlTab.disallowForScreenReaders")) | |
| 109 Preferences::SetBool("browser.ctrlTab.disallowForScreenReaders", true); | |
| 110 } | |
| 111 } | |
| 112 |
