1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/windows/msaa/Compatibility.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,112 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#include "Compatibility.h"
1.11 +
1.12 +#include "nsWinUtils.h"
1.13 +#include "Statistics.h"
1.14 +
1.15 +#include "mozilla/Preferences.h"
1.16 +
1.17 +using namespace mozilla;
1.18 +using namespace mozilla::a11y;
1.19 +
1.20 +/**
1.21 + * Return true if module version is lesser than the given version.
1.22 + */
1.23 +bool
1.24 +IsModuleVersionLessThan(HMODULE aModuleHandle, DWORD aMajor, DWORD aMinor)
1.25 +{
1.26 + wchar_t fileName[MAX_PATH];
1.27 + ::GetModuleFileNameW(aModuleHandle, fileName, MAX_PATH);
1.28 +
1.29 + DWORD dummy = 0;
1.30 + DWORD length = ::GetFileVersionInfoSizeW(fileName, &dummy);
1.31 +
1.32 + LPBYTE versionInfo = new BYTE[length];
1.33 + ::GetFileVersionInfoW(fileName, 0, length, versionInfo);
1.34 +
1.35 + UINT uLen;
1.36 + VS_FIXEDFILEINFO* fixedFileInfo = nullptr;
1.37 + ::VerQueryValueW(versionInfo, L"\\", (LPVOID*)&fixedFileInfo, &uLen);
1.38 + DWORD dwFileVersionMS = fixedFileInfo->dwFileVersionMS;
1.39 + DWORD dwFileVersionLS = fixedFileInfo->dwFileVersionLS;
1.40 + delete [] versionInfo;
1.41 +
1.42 + DWORD dwLeftMost = HIWORD(dwFileVersionMS);
1.43 + DWORD dwSecondRight = HIWORD(dwFileVersionLS);
1.44 + return (dwLeftMost < aMajor ||
1.45 + (dwLeftMost == aMajor && dwSecondRight < aMinor));
1.46 +}
1.47 +
1.48 +
1.49 +////////////////////////////////////////////////////////////////////////////////
1.50 +// Compatibility
1.51 +////////////////////////////////////////////////////////////////////////////////
1.52 +
1.53 +uint32_t Compatibility::sConsumers = Compatibility::UNKNOWN;
1.54 +
1.55 +void
1.56 +Compatibility::Init()
1.57 +{
1.58 + // Note we collect some AT statistics/telemetry here for convenience.
1.59 +
1.60 + HMODULE jawsHandle = ::GetModuleHandleW(L"jhook");
1.61 + if (jawsHandle)
1.62 + sConsumers |= (IsModuleVersionLessThan(jawsHandle, 8, 2173)) ?
1.63 + OLDJAWS : JAWS;
1.64 +
1.65 + if (::GetModuleHandleW(L"gwm32inc"))
1.66 + sConsumers |= WE;
1.67 +
1.68 + if (::GetModuleHandleW(L"dolwinhk"))
1.69 + sConsumers |= DOLPHIN;
1.70 +
1.71 + if (::GetModuleHandleW(L"STSA32"))
1.72 + sConsumers |= SEROTEK;
1.73 +
1.74 + if (::GetModuleHandleW(L"nvdaHelperRemote"))
1.75 + sConsumers |= NVDA;
1.76 +
1.77 + if (::GetModuleHandleW(L"OsmHooks"))
1.78 + sConsumers |= COBRA;
1.79 +
1.80 + if (::GetModuleHandleW(L"WebFinderRemote"))
1.81 + sConsumers |= ZOOMTEXT;
1.82 +
1.83 + if (::GetModuleHandleW(L"Kazahook"))
1.84 + sConsumers |= KAZAGURU;
1.85 +
1.86 + if (::GetModuleHandleW(L"TextExtractorImpl32") ||
1.87 + ::GetModuleHandleW(L"TextExtractorImpl64"))
1.88 + sConsumers |= YOUDAO;
1.89 +
1.90 + if (::GetModuleHandleW(L"uiautomation") ||
1.91 + ::GetModuleHandleW(L"uiautomationcore"))
1.92 + sConsumers |= UIAUTOMATION;
1.93 +
1.94 + // If we have a known consumer remove the unknown bit.
1.95 + if (sConsumers != Compatibility::UNKNOWN)
1.96 + sConsumers ^= Compatibility::UNKNOWN;
1.97 +
1.98 + // Gather telemetry
1.99 + uint32_t temp = sConsumers;
1.100 + for (int i = 0; temp; i++) {
1.101 + if (temp & 0x1)
1.102 + statistics::A11yConsumers(i);
1.103 +
1.104 + temp >>= 1;
1.105 + }
1.106 +
1.107 + // Turn off new tab switching for Jaws and WE.
1.108 + if (sConsumers & (JAWS | OLDJAWS | WE)) {
1.109 + // Check to see if the pref for disallowing CtrlTab is already set. If so,
1.110 + // bail out (respect the user settings). If not, set it.
1.111 + if (!Preferences::HasUserValue("browser.ctrlTab.disallowForScreenReaders"))
1.112 + Preferences::SetBool("browser.ctrlTab.disallowForScreenReaders", true);
1.113 + }
1.114 +}
1.115 +
