зеркало из https://github.com/mozilla/gecko-dev.git
114 строки
4.1 KiB
C++
114 строки
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "OSKTabTipManager.h"
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#include "mozilla/Preferences.h"
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#include "nsDebug.h"
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#include "WinUtils.h"
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#include <shellapi.h>
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#include <shlobj.h>
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#include <windows.h>
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namespace mozilla {
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namespace widget {
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/**
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* Get the HWND for the on-screen keyboard, if it's up. Only
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* allowed for Windows 8 and higher.
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*/
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static HWND GetOnScreenKeyboardWindow() {
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const wchar_t kOSKClassName[] = L"IPTip_Main_Window";
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HWND osk = ::FindWindowW(kOSKClassName, nullptr);
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if (::IsWindow(osk) && ::IsWindowEnabled(osk) && ::IsWindowVisible(osk)) {
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return osk;
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}
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return nullptr;
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}
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// static
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void OSKTabTipManager::ShowOnScreenKeyboard() {
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const char* kOskPathPrefName = "ui.osk.on_screen_keyboard_path";
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if (GetOnScreenKeyboardWindow()) {
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return;
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}
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nsAutoString cachedPath;
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nsresult result = Preferences::GetString(kOskPathPrefName, cachedPath);
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if (NS_FAILED(result) || cachedPath.IsEmpty()) {
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wchar_t path[MAX_PATH];
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// The path to TabTip.exe is defined at the following registry key.
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// This is pulled out of the 64-bit registry hive directly.
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const wchar_t kRegKeyName[] =
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L"Software\\Classes\\CLSID\\"
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L"{054AAE20-4BEA-4347-8A35-64A533254A9D}\\LocalServer32";
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if (!WinUtils::GetRegistryKey(HKEY_LOCAL_MACHINE, kRegKeyName, nullptr,
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path, sizeof path)) {
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return;
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}
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std::wstring wstrpath(path);
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// The path provided by the registry will often contain
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// %CommonProgramFiles%, which will need to be replaced if it is present.
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size_t commonProgramFilesOffset = wstrpath.find(L"%CommonProgramFiles%");
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if (commonProgramFilesOffset != std::wstring::npos) {
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// The path read from the registry contains the %CommonProgramFiles%
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// environment variable prefix. On 64 bit Windows the
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// SHGetKnownFolderPath function returns the common program files path
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// with the X86 suffix for the FOLDERID_ProgramFilesCommon value.
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// To get the correct path to TabTip.exe we first read the environment
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// variable CommonProgramW6432 which points to the desired common
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// files path. Failing that we fallback to the SHGetKnownFolderPath API.
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// We then replace the %CommonProgramFiles% value with the actual common
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// files path found in the process.
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std::wstring commonProgramFilesPath;
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std::vector<wchar_t> commonProgramFilesPathW6432;
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DWORD bufferSize =
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::GetEnvironmentVariableW(L"CommonProgramW6432", nullptr, 0);
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if (bufferSize) {
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commonProgramFilesPathW6432.resize(bufferSize);
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::GetEnvironmentVariableW(L"CommonProgramW6432",
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commonProgramFilesPathW6432.data(),
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bufferSize);
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commonProgramFilesPath =
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std::wstring(commonProgramFilesPathW6432.data());
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} else {
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PWSTR path = nullptr;
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HRESULT hres = SHGetKnownFolderPath(FOLDERID_ProgramFilesCommon, 0,
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nullptr, &path);
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if (FAILED(hres) || !path) {
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return;
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}
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commonProgramFilesPath =
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static_cast<const wchar_t*>(nsDependentString(path).get());
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::CoTaskMemFree(path);
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}
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wstrpath.replace(commonProgramFilesOffset,
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wcslen(L"%CommonProgramFiles%"), commonProgramFilesPath);
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}
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cachedPath.Assign(wstrpath.data());
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Preferences::SetString(kOskPathPrefName, cachedPath);
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}
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const char16_t* cachedPathPtr;
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cachedPath.GetData(&cachedPathPtr);
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ShellExecuteW(nullptr, L"", char16ptr_t(cachedPathPtr), nullptr, nullptr,
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SW_SHOW);
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}
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// static
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void OSKTabTipManager::DismissOnScreenKeyboard() {
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HWND osk = GetOnScreenKeyboardWindow();
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if (osk) {
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::PostMessage(osk, WM_SYSCOMMAND, SC_CLOSE, 0);
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}
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}
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} // namespace widget
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} // namespace mozilla
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