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Diffstat (limited to 'widget/windows/WinUtils.cpp')
| -rw-r--r-- | widget/windows/WinUtils.cpp | 2107 |
1 files changed, 2107 insertions, 0 deletions
diff --git a/widget/windows/WinUtils.cpp b/widget/windows/WinUtils.cpp new file mode 100644 index 0000000000..1d8fad16f7 --- /dev/null +++ b/widget/windows/WinUtils.cpp @@ -0,0 +1,2107 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim:set ts=2 sts=2 sw=2 et cin: */ +/* 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 "WinUtils.h" + +#include <knownfolders.h> +#include <winioctl.h> + +#include "gfxPlatform.h" +#include "gfxUtils.h" +#include "nsWindow.h" +#include "nsWindowDefs.h" +#include "InputDeviceUtils.h" +#include "KeyboardLayout.h" +#include "mozilla/ArrayUtils.h" +#include "mozilla/BackgroundHangMonitor.h" +#include "mozilla/ClearOnShutdown.h" +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/gfx/2D.h" +#include "mozilla/gfx/DataSurfaceHelpers.h" +#include "mozilla/gfx/DisplayConfigWindows.h" +#include "mozilla/gfx/Logging.h" +#include "mozilla/Preferences.h" +#include "mozilla/ProfilerThreadSleep.h" +#include "mozilla/RefPtr.h" +#include "mozilla/SchedulerGroup.h" +#include "mozilla/WinHeaderOnlyUtils.h" +#include "mozilla/Unused.h" +#include "nsIContentPolicy.h" +#include "WindowsUIUtils.h" +#include "nsContentUtils.h" + +#include "mozilla/Logging.h" + +#include "nsString.h" +#include "nsDirectoryServiceUtils.h" +#include "imgIContainer.h" +#include "imgITools.h" +#include "nsNetUtil.h" +#include "nsIOutputStream.h" +#include "nsNetCID.h" +#include "prtime.h" +#ifdef MOZ_PLACES +# include "nsIFaviconService.h" +#endif +#include "nsIDownloader.h" +#include "nsIChannel.h" +#include "nsIThread.h" +#include "MainThreadUtils.h" +#include "nsLookAndFeel.h" +#include "nsUnicharUtils.h" +#include "nsWindowsHelpers.h" +#include "WinWindowOcclusionTracker.h" + +#include <textstor.h> +#include "TSFTextStore.h" + +#include <shellscalingapi.h> +#include <shlobj.h> +#include <shlwapi.h> + +mozilla::LazyLogModule gWindowsLog("Widget"); + +#define LOG_E(...) MOZ_LOG(gWindowsLog, LogLevel::Error, (__VA_ARGS__)) +#define LOG_D(...) MOZ_LOG(gWindowsLog, LogLevel::Debug, (__VA_ARGS__)) + +using namespace mozilla::gfx; + +namespace mozilla { +namespace widget { + +#ifdef MOZ_PLACES +NS_IMPL_ISUPPORTS(myDownloadObserver, nsIDownloadObserver) +NS_IMPL_ISUPPORTS(AsyncFaviconDataReady, nsIFaviconDataCallback) +#endif +NS_IMPL_ISUPPORTS(AsyncEncodeAndWriteIcon, nsIRunnable) +NS_IMPL_ISUPPORTS(AsyncDeleteAllFaviconsFromDisk, nsIRunnable) + +const char FaviconHelper::kJumpListCacheDir[] = "jumpListCache"; +const char FaviconHelper::kShortcutCacheDir[] = "shortcutCache"; + +struct CoTaskMemFreePolicy { + void operator()(void* aPtr) { ::CoTaskMemFree(aPtr); } +}; + +SetThreadDpiAwarenessContextProc WinUtils::sSetThreadDpiAwarenessContext = NULL; +EnableNonClientDpiScalingProc WinUtils::sEnableNonClientDpiScaling = NULL; +GetSystemMetricsForDpiProc WinUtils::sGetSystemMetricsForDpi = NULL; +bool WinUtils::sHasPackageIdentity = false; + +using GetDpiForWindowProc = UINT(WINAPI*)(HWND); +static GetDpiForWindowProc sGetDpiForWindow = NULL; + +/* static */ +void WinUtils::Initialize() { + // Dpi-Awareness is not supported with Win32k Lockdown enabled, so we don't + // initialize DPI-related members and assert later that nothing accidently + // uses these static members + if (!IsWin32kLockedDown()) { + HMODULE user32Dll = ::GetModuleHandleW(L"user32"); + if (user32Dll) { + auto getThreadDpiAwarenessContext = + (decltype(GetThreadDpiAwarenessContext)*)::GetProcAddress( + user32Dll, "GetThreadDpiAwarenessContext"); + auto areDpiAwarenessContextsEqual = + (decltype(AreDpiAwarenessContextsEqual)*)::GetProcAddress( + user32Dll, "AreDpiAwarenessContextsEqual"); + if (getThreadDpiAwarenessContext && areDpiAwarenessContextsEqual && + areDpiAwarenessContextsEqual( + getThreadDpiAwarenessContext(), + DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE)) { + // Only per-monitor v1 requires these workarounds. + sEnableNonClientDpiScaling = + (EnableNonClientDpiScalingProc)::GetProcAddress( + user32Dll, "EnableNonClientDpiScaling"); + sSetThreadDpiAwarenessContext = + (SetThreadDpiAwarenessContextProc)::GetProcAddress( + user32Dll, "SetThreadDpiAwarenessContext"); + } + + sGetSystemMetricsForDpi = (GetSystemMetricsForDpiProc)::GetProcAddress( + user32Dll, "GetSystemMetricsForDpi"); + sGetDpiForWindow = + (GetDpiForWindowProc)::GetProcAddress(user32Dll, "GetDpiForWindow"); + } + } + + sHasPackageIdentity = mozilla::HasPackageIdentity(); +} + +// static +LRESULT WINAPI WinUtils::NonClientDpiScalingDefWindowProcW(HWND hWnd, UINT msg, + WPARAM wParam, + LPARAM lParam) { + MOZ_DIAGNOSTIC_ASSERT(!IsWin32kLockedDown()); + + // NOTE: this function was copied out into the body of the pre-XUL skeleton + // UI window proc (PreXULSkeletonUI.cpp). If this function changes at any + // point, we should probably factor this out and use it from both locations. + if (msg == WM_NCCREATE && sEnableNonClientDpiScaling) { + sEnableNonClientDpiScaling(hWnd); + } + return ::DefWindowProcW(hWnd, msg, wParam, lParam); +} + +// static +void WinUtils::LogW(const wchar_t* fmt, ...) { + va_list args = nullptr; + if (!lstrlenW(fmt)) { + return; + } + va_start(args, fmt); + int buflen = _vscwprintf(fmt, args); + wchar_t* buffer = new wchar_t[buflen + 1]; + if (!buffer) { + va_end(args); + return; + } + vswprintf(buffer, buflen, fmt, args); + va_end(args); + + // MSVC, including remote debug sessions + OutputDebugStringW(buffer); + OutputDebugStringW(L"\n"); + + int len = + WideCharToMultiByte(CP_ACP, 0, buffer, -1, nullptr, 0, nullptr, nullptr); + if (len) { + char* utf8 = new char[len]; + if (WideCharToMultiByte(CP_ACP, 0, buffer, -1, utf8, len, nullptr, + nullptr) > 0) { + // desktop console + printf("%s\n", utf8); + NS_ASSERTION(gWindowsLog, + "Called WinUtils Log() but Widget " + "log module doesn't exist!"); + MOZ_LOG(gWindowsLog, LogLevel::Error, ("%s", utf8)); + } + delete[] utf8; + } + delete[] buffer; +} + +// static +void WinUtils::Log(const char* fmt, ...) { + va_list args = nullptr; + if (!strlen(fmt)) { + return; + } + va_start(args, fmt); + int buflen = _vscprintf(fmt, args); + char* buffer = new char[buflen + 1]; + if (!buffer) { + va_end(args); + return; + } + vsprintf(buffer, fmt, args); + va_end(args); + + // MSVC, including remote debug sessions + OutputDebugStringA(buffer); + OutputDebugStringW(L"\n"); + + // desktop console + printf("%s\n", buffer); + + NS_ASSERTION(gWindowsLog, + "Called WinUtils Log() but Widget " + "log module doesn't exist!"); + MOZ_LOG(gWindowsLog, LogLevel::Error, ("%s", buffer)); + delete[] buffer; +} + +// static +float WinUtils::SystemDPI() { + // The result of GetDeviceCaps won't change dynamically, as it predates + // per-monitor DPI and support for on-the-fly resolution changes. + // Therefore, we only need to look it up once. + static float dpi = 0; + if (dpi <= 0) { + HDC screenDC = GetDC(nullptr); + dpi = GetDeviceCaps(screenDC, LOGPIXELSY); + ReleaseDC(nullptr, screenDC); + } + + // Bug 1012487 - dpi can be 0 when the Screen DC is used off the + // main thread on windows. For now just assume a 100% DPI for this + // drawing call. + // XXX - fixme! + return dpi > 0 ? dpi : 96; +} + +// static +double WinUtils::SystemScaleFactor() { return SystemDPI() / 96.0; } + +typedef HRESULT(WINAPI* GETDPIFORMONITORPROC)(HMONITOR, MONITOR_DPI_TYPE, UINT*, + UINT*); + +typedef HRESULT(WINAPI* GETPROCESSDPIAWARENESSPROC)(HANDLE, + PROCESS_DPI_AWARENESS*); + +GETDPIFORMONITORPROC sGetDpiForMonitor; +GETPROCESSDPIAWARENESSPROC sGetProcessDpiAwareness; + +static bool SlowIsPerMonitorDPIAware() { + // Intentionally leak the handle. + HMODULE shcore = LoadLibraryEx(L"shcore", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32); + if (shcore) { + sGetDpiForMonitor = + (GETDPIFORMONITORPROC)GetProcAddress(shcore, "GetDpiForMonitor"); + sGetProcessDpiAwareness = (GETPROCESSDPIAWARENESSPROC)GetProcAddress( + shcore, "GetProcessDpiAwareness"); + } + PROCESS_DPI_AWARENESS dpiAwareness; + return sGetDpiForMonitor && sGetProcessDpiAwareness && + SUCCEEDED( + sGetProcessDpiAwareness(GetCurrentProcess(), &dpiAwareness)) && + dpiAwareness == PROCESS_PER_MONITOR_DPI_AWARE; +} + +/* static */ +bool WinUtils::IsPerMonitorDPIAware() { + static bool perMonitorDPIAware = SlowIsPerMonitorDPIAware(); + return perMonitorDPIAware; +} + +/* static */ +float WinUtils::MonitorDPI(HMONITOR aMonitor) { + if (IsPerMonitorDPIAware()) { + UINT dpiX, dpiY = 96; + sGetDpiForMonitor(aMonitor ? aMonitor : GetPrimaryMonitor(), + MDT_EFFECTIVE_DPI, &dpiX, &dpiY); + return dpiY; + } + + // We're not per-monitor aware, use system DPI instead. + return SystemDPI(); +} + +/* static */ +double WinUtils::LogToPhysFactor(HMONITOR aMonitor) { + return MonitorDPI(aMonitor) / 96.0; +} + +/* static */ +int32_t WinUtils::LogToPhys(HMONITOR aMonitor, double aValue) { + return int32_t(NS_round(aValue * LogToPhysFactor(aMonitor))); +} + +/* static */ +double WinUtils::LogToPhysFactor(HWND aWnd) { + // if there's an ancestor window, we want to share its DPI setting + HWND ancestor = ::GetAncestor(aWnd, GA_ROOTOWNER); + + // The GetDpiForWindow api is not available everywhere where we run as + // per-monitor, but if it is available rely on it to tell us the scale + // factor of the window. See bug 1722085. + if (sGetDpiForWindow) { + UINT dpi = sGetDpiForWindow(ancestor ? ancestor : aWnd); + if (dpi > 0) { + return static_cast<double>(dpi) / 96.0; + } + } + return LogToPhysFactor(::MonitorFromWindow(ancestor ? ancestor : aWnd, + MONITOR_DEFAULTTOPRIMARY)); +} + +/* static */ +HMONITOR +WinUtils::GetPrimaryMonitor() { + const POINT pt = {0, 0}; + return ::MonitorFromPoint(pt, MONITOR_DEFAULTTOPRIMARY); +} + +/* static */ +HMONITOR +WinUtils::MonitorFromRect(const gfx::Rect& rect) { + // convert coordinates from desktop to device pixels for MonitorFromRect + double dpiScale = + IsPerMonitorDPIAware() ? 1.0 : LogToPhysFactor(GetPrimaryMonitor()); + + RECT globalWindowBounds = {NSToIntRound(dpiScale * rect.X()), + NSToIntRound(dpiScale * rect.Y()), + NSToIntRound(dpiScale * (rect.XMost())), + NSToIntRound(dpiScale * (rect.YMost()))}; + + return ::MonitorFromRect(&globalWindowBounds, MONITOR_DEFAULTTONEAREST); +} + +/* static */ +bool WinUtils::HasSystemMetricsForDpi() { + MOZ_DIAGNOSTIC_ASSERT(!IsWin32kLockedDown()); + return (sGetSystemMetricsForDpi != NULL); +} + +/* static */ +int WinUtils::GetSystemMetricsForDpi(int nIndex, UINT dpi) { + MOZ_DIAGNOSTIC_ASSERT(!IsWin32kLockedDown()); + if (HasSystemMetricsForDpi()) { + return sGetSystemMetricsForDpi(nIndex, dpi); + } else { + double scale = IsPerMonitorDPIAware() ? dpi / SystemDPI() : 1.0; + return NSToIntRound(::GetSystemMetrics(nIndex) * scale); + } +} + +/* static */ +gfx::MarginDouble WinUtils::GetUnwriteableMarginsForDeviceInInches(HDC aHdc) { + if (!aHdc) { + return gfx::MarginDouble(); + } + + int pixelsPerInchY = ::GetDeviceCaps(aHdc, LOGPIXELSY); + int marginTop = ::GetDeviceCaps(aHdc, PHYSICALOFFSETY); + int printableAreaHeight = ::GetDeviceCaps(aHdc, VERTRES); + int physicalHeight = ::GetDeviceCaps(aHdc, PHYSICALHEIGHT); + + double marginTopInch = double(marginTop) / pixelsPerInchY; + + double printableAreaHeightInch = double(printableAreaHeight) / pixelsPerInchY; + double physicalHeightInch = double(physicalHeight) / pixelsPerInchY; + double marginBottomInch = + physicalHeightInch - printableAreaHeightInch - marginTopInch; + + int pixelsPerInchX = ::GetDeviceCaps(aHdc, LOGPIXELSX); + int marginLeft = ::GetDeviceCaps(aHdc, PHYSICALOFFSETX); + int printableAreaWidth = ::GetDeviceCaps(aHdc, HORZRES); + int physicalWidth = ::GetDeviceCaps(aHdc, PHYSICALWIDTH); + + double marginLeftInch = double(marginLeft) / pixelsPerInchX; + + double printableAreaWidthInch = double(printableAreaWidth) / pixelsPerInchX; + double physicalWidthInch = double(physicalWidth) / pixelsPerInchX; + double marginRightInch = + physicalWidthInch - printableAreaWidthInch - marginLeftInch; + + return gfx::MarginDouble(marginTopInch, marginRightInch, marginBottomInch, + marginLeftInch); +} + +#ifdef ACCESSIBILITY +/* static */ +a11y::LocalAccessible* WinUtils::GetRootAccessibleForHWND(HWND aHwnd) { + nsWindow* window = GetNSWindowPtr(aHwnd); + if (!window) { + return nullptr; + } + + return window->GetAccessible(); +} +#endif // ACCESSIBILITY + +/* static */ +bool WinUtils::PeekMessage(LPMSG aMsg, HWND aWnd, UINT aFirstMessage, + UINT aLastMessage, UINT aOption) { + RefPtr<ITfMessagePump> msgPump = TSFTextStore::GetMessagePump(); + if (msgPump) { + BOOL ret = FALSE; + HRESULT hr = msgPump->PeekMessageW(aMsg, aWnd, aFirstMessage, aLastMessage, + aOption, &ret); + NS_ENSURE_TRUE(SUCCEEDED(hr), false); + return ret; + } + return ::PeekMessageW(aMsg, aWnd, aFirstMessage, aLastMessage, aOption); +} + +/* static */ +bool WinUtils::GetMessage(LPMSG aMsg, HWND aWnd, UINT aFirstMessage, + UINT aLastMessage) { + RefPtr<ITfMessagePump> msgPump = TSFTextStore::GetMessagePump(); + if (msgPump) { + BOOL ret = FALSE; + HRESULT hr = + msgPump->GetMessageW(aMsg, aWnd, aFirstMessage, aLastMessage, &ret); + NS_ENSURE_TRUE(SUCCEEDED(hr), false); + return ret; + } + return ::GetMessageW(aMsg, aWnd, aFirstMessage, aLastMessage); +} + +#if defined(ACCESSIBILITY) +static DWORD GetWaitFlags() { + DWORD result = MWMO_INPUTAVAILABLE; + if (XRE_IsContentProcess()) { + result |= MWMO_ALERTABLE; + } + return result; +} +#endif + +/* static */ +void WinUtils::WaitForMessage(DWORD aTimeoutMs) { +#if defined(ACCESSIBILITY) + static const DWORD waitFlags = GetWaitFlags(); +#else + const DWORD waitFlags = MWMO_INPUTAVAILABLE; +#endif + + const DWORD waitStart = ::GetTickCount(); + DWORD elapsed = 0; + while (true) { + if (aTimeoutMs != INFINITE) { + elapsed = ::GetTickCount() - waitStart; + } + if (elapsed >= aTimeoutMs) { + break; + } + DWORD result; + { + AUTO_PROFILER_THREAD_SLEEP; + result = ::MsgWaitForMultipleObjectsEx(0, NULL, aTimeoutMs - elapsed, + MOZ_QS_ALLEVENT, waitFlags); + } + NS_WARNING_ASSERTION(result != WAIT_FAILED, "Wait failed"); + if (result == WAIT_TIMEOUT) { + break; + } +#if defined(ACCESSIBILITY) + if (result == WAIT_IO_COMPLETION) { + if (NS_IsMainThread()) { + // We executed an APC that would have woken up the hang monitor. Since + // there are no more APCs pending and we are now going to sleep again, + // we should notify the hang monitor. + mozilla::BackgroundHangMonitor().NotifyWait(); + } + continue; + } +#endif // defined(ACCESSIBILITY) + + // Sent messages (via SendMessage and friends) are processed differently + // than queued messages (via PostMessage); the destination window procedure + // of the sent message is called during (Get|Peek)Message. Since PeekMessage + // does not tell us whether it processed any sent messages, we need to query + // this ahead of time. + bool haveSentMessagesPending = + (HIWORD(::GetQueueStatus(QS_SENDMESSAGE)) & QS_SENDMESSAGE) != 0; + + MSG msg = {0}; + if (haveSentMessagesPending || + ::PeekMessageW(&msg, nullptr, 0, 0, PM_NOREMOVE)) { + break; + } + // The message is intended for another thread that has been synchronized + // with our input queue; yield to give other threads an opportunity to + // process the message. This should prevent busy waiting if resumed due + // to another thread's message. + ::SwitchToThread(); + } +} + +/* static */ +HWND WinUtils::GetTopLevelHWND(HWND aWnd, bool aStopIfNotChild, + bool aStopIfNotPopup) { + HWND curWnd = aWnd; + HWND topWnd = nullptr; + + while (curWnd) { + topWnd = curWnd; + + if (aStopIfNotChild) { + DWORD_PTR style = ::GetWindowLongPtrW(curWnd, GWL_STYLE); + + VERIFY_WINDOW_STYLE(style); + + if (!(style & WS_CHILD)) // first top-level window + break; + } + + HWND upWnd = ::GetParent(curWnd); // Parent or owner (if has no parent) + + // GetParent will only return the owner if the passed in window + // has the WS_POPUP style. + if (!upWnd && !aStopIfNotPopup) { + upWnd = ::GetWindow(curWnd, GW_OWNER); + } + curWnd = upWnd; + } + + return topWnd; +} + +// Map from native window handles to nsWindow structures. Does not AddRef. +// Inherently unsafe to access outside the main thread. +static nsTHashMap<HWND, nsWindow*> sExtantNSWindows; + +/* static */ +void WinUtils::SetNSWindowPtr(HWND aWnd, nsWindow* aWindow) { + MOZ_ASSERT(NS_IsMainThread()); + if (!aWindow) { + sExtantNSWindows.Remove(aWnd); + } else { + sExtantNSWindows.InsertOrUpdate(aWnd, aWindow); + } +} + +/* static */ +nsWindow* WinUtils::GetNSWindowPtr(HWND aWnd) { + MOZ_ASSERT(NS_IsMainThread()); + return sExtantNSWindows.Get(aWnd); // or nullptr +} + +/* static */ +bool WinUtils::IsOurProcessWindow(HWND aWnd) { + if (!aWnd) { + return false; + } + DWORD processId = 0; + ::GetWindowThreadProcessId(aWnd, &processId); + return (processId == ::GetCurrentProcessId()); +} + +/* static */ +HWND WinUtils::FindOurProcessWindow(HWND aWnd) { + for (HWND wnd = ::GetParent(aWnd); wnd; wnd = ::GetParent(wnd)) { + if (IsOurProcessWindow(wnd)) { + return wnd; + } + } + return nullptr; +} + +static bool IsPointInWindow(HWND aWnd, const POINT& aPointInScreen) { + RECT bounds; + if (!::GetWindowRect(aWnd, &bounds)) { + return false; + } + + return (aPointInScreen.x >= bounds.left && aPointInScreen.x < bounds.right && + aPointInScreen.y >= bounds.top && aPointInScreen.y < bounds.bottom); +} + +/** + * FindTopmostWindowAtPoint() returns the topmost child window (topmost means + * forground in this context) of aWnd. + */ + +static HWND FindTopmostWindowAtPoint(HWND aWnd, const POINT& aPointInScreen) { + if (!::IsWindowVisible(aWnd) || !IsPointInWindow(aWnd, aPointInScreen)) { + return nullptr; + } + + HWND childWnd = ::GetTopWindow(aWnd); + while (childWnd) { + HWND topmostWnd = FindTopmostWindowAtPoint(childWnd, aPointInScreen); + if (topmostWnd) { + return topmostWnd; + } + childWnd = ::GetNextWindow(childWnd, GW_HWNDNEXT); + } + + return aWnd; +} + +struct FindOurWindowAtPointInfo { + POINT mInPointInScreen; + HWND mOutWnd; +}; + +static BOOL CALLBACK FindOurWindowAtPointCallback(HWND aWnd, LPARAM aLPARAM) { + if (!WinUtils::IsOurProcessWindow(aWnd)) { + // This isn't one of our top-level windows; continue enumerating. + return TRUE; + } + + // Get the top-most child window under the point. If there's no child + // window, and the point is within the top-level window, then the top-level + // window will be returned. (This is the usual case. A child window + // would be returned for plugins.) + FindOurWindowAtPointInfo* info = + reinterpret_cast<FindOurWindowAtPointInfo*>(aLPARAM); + HWND childWnd = FindTopmostWindowAtPoint(aWnd, info->mInPointInScreen); + if (!childWnd) { + // This window doesn't contain the point; continue enumerating. + return TRUE; + } + + // Return the HWND and stop enumerating. + info->mOutWnd = childWnd; + return FALSE; +} + +/* static */ +HWND WinUtils::FindOurWindowAtPoint(const POINT& aPointInScreen) { + FindOurWindowAtPointInfo info; + info.mInPointInScreen = aPointInScreen; + info.mOutWnd = nullptr; + + // This will enumerate all top-level windows in order from top to bottom. + EnumWindows(FindOurWindowAtPointCallback, reinterpret_cast<LPARAM>(&info)); + return info.mOutWnd; +} + +/* static */ +UINT WinUtils::GetInternalMessage(UINT aNativeMessage) { + switch (aNativeMessage) { + case WM_MOUSEWHEEL: + return MOZ_WM_MOUSEVWHEEL; + case WM_MOUSEHWHEEL: + return MOZ_WM_MOUSEHWHEEL; + case WM_VSCROLL: + return MOZ_WM_VSCROLL; + case WM_HSCROLL: + return MOZ_WM_HSCROLL; + default: + return aNativeMessage; + } +} + +/* static */ +UINT WinUtils::GetNativeMessage(UINT aInternalMessage) { + switch (aInternalMessage) { + case MOZ_WM_MOUSEVWHEEL: + return WM_MOUSEWHEEL; + case MOZ_WM_MOUSEHWHEEL: + return WM_MOUSEHWHEEL; + case MOZ_WM_VSCROLL: + return WM_VSCROLL; + case MOZ_WM_HSCROLL: + return WM_HSCROLL; + default: + return aInternalMessage; + } +} + +/* static */ +uint16_t WinUtils::GetMouseInputSource() { + int32_t inputSource = dom::MouseEvent_Binding::MOZ_SOURCE_MOUSE; + LPARAM lParamExtraInfo = ::GetMessageExtraInfo(); + if ((lParamExtraInfo & TABLET_INK_SIGNATURE) == TABLET_INK_CHECK) { + inputSource = (lParamExtraInfo & TABLET_INK_TOUCH) + ? dom::MouseEvent_Binding::MOZ_SOURCE_TOUCH + : dom::MouseEvent_Binding::MOZ_SOURCE_PEN; + } + return static_cast<uint16_t>(inputSource); +} + +/* static */ +uint16_t WinUtils::GetMousePointerID() { + LPARAM lParamExtraInfo = ::GetMessageExtraInfo(); + return lParamExtraInfo & TABLET_INK_ID_MASK; +} + +/* static */ +bool WinUtils::GetIsMouseFromTouch(EventMessage aEventMessage) { + const uint32_t MOZ_T_I_SIGNATURE = TABLET_INK_TOUCH | TABLET_INK_SIGNATURE; + const uint32_t MOZ_T_I_CHECK_TCH = TABLET_INK_TOUCH | TABLET_INK_CHECK; + return ((aEventMessage == eMouseMove || aEventMessage == eMouseDown || + aEventMessage == eMouseUp || aEventMessage == eMouseAuxClick || + aEventMessage == eMouseDoubleClick) && + (GetMessageExtraInfo() & MOZ_T_I_SIGNATURE) == MOZ_T_I_CHECK_TCH); +} + +/* static */ +MSG WinUtils::InitMSG(UINT aMessage, WPARAM wParam, LPARAM lParam, HWND aWnd) { + MSG msg; + msg.message = aMessage; + msg.wParam = wParam; + msg.lParam = lParam; + msg.hwnd = aWnd; + return msg; +} + +#ifdef MOZ_PLACES +/************************************************************************ + * Constructs as AsyncFaviconDataReady Object + * @param aIOThread : the thread which performs the action + * @param aURLShortcut : Differentiates between (false)Jumplistcache and + * (true)Shortcutcache + * @param aRunnable : Executed in the aIOThread when the favicon cache is + * avaiable + ************************************************************************/ + +AsyncFaviconDataReady::AsyncFaviconDataReady( + nsIURI* aNewURI, RefPtr<LazyIdleThread>& aIOThread, const bool aURLShortcut, + already_AddRefed<nsIRunnable> aRunnable) + : mNewURI(aNewURI), + mIOThread(aIOThread), + mRunnable(aRunnable), + mURLShortcut(aURLShortcut) {} + +NS_IMETHODIMP +myDownloadObserver::OnDownloadComplete(nsIDownloader* downloader, + nsIRequest* request, nsresult status, + nsIFile* result) { + return NS_OK; +} + +nsresult AsyncFaviconDataReady::OnFaviconDataNotAvailable(void) { + if (!mURLShortcut) { + return NS_OK; + } + + nsCOMPtr<nsIFile> icoFile; + nsresult rv = + FaviconHelper::GetOutputIconPath(mNewURI, icoFile, mURLShortcut); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIURI> mozIconURI; + rv = NS_NewURI(getter_AddRefs(mozIconURI), "moz-icon://.html?size=32"); + if (NS_FAILED(rv)) { + return rv; + } + + nsCOMPtr<nsIChannel> channel; + rv = NS_NewChannel(getter_AddRefs(channel), mozIconURI, + nsContentUtils::GetSystemPrincipal(), + nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_SEC_CONTEXT_IS_NULL, + nsIContentPolicy::TYPE_INTERNAL_IMAGE); + + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIDownloadObserver> downloadObserver = new myDownloadObserver; + nsCOMPtr<nsIStreamListener> listener; + rv = NS_NewDownloader(getter_AddRefs(listener), downloadObserver, icoFile); + NS_ENSURE_SUCCESS(rv, rv); + + return channel->AsyncOpen(listener); +} + +NS_IMETHODIMP +AsyncFaviconDataReady::OnComplete(nsIURI* aFaviconURI, uint32_t aDataLen, + const uint8_t* aData, + const nsACString& aMimeType, + uint16_t aWidth) { + if (!aDataLen || !aData) { + if (mURLShortcut) { + OnFaviconDataNotAvailable(); + } + + return NS_OK; + } + + nsCOMPtr<nsIFile> icoFile; + nsresult rv = + FaviconHelper::GetOutputIconPath(mNewURI, icoFile, mURLShortcut); + NS_ENSURE_SUCCESS(rv, rv); + + nsAutoString path; + rv = icoFile->GetPath(path); + NS_ENSURE_SUCCESS(rv, rv); + + // Decode the image from the format it was returned to us in (probably PNG) + nsCOMPtr<imgIContainer> container; + nsCOMPtr<imgITools> imgtool = do_CreateInstance("@mozilla.org/image/tools;1"); + rv = imgtool->DecodeImageFromBuffer(reinterpret_cast<const char*>(aData), + aDataLen, aMimeType, + getter_AddRefs(container)); + NS_ENSURE_SUCCESS(rv, rv); + + RefPtr<SourceSurface> surface = container->GetFrame( + imgIContainer::FRAME_FIRST, + imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY); + NS_ENSURE_TRUE(surface, NS_ERROR_FAILURE); + + RefPtr<DataSourceSurface> dataSurface; + IntSize size; + + if (mURLShortcut && + (surface->GetSize().width < 48 || surface->GetSize().height < 48)) { + // Create a 48x48 surface and paint the icon into the central rect. + size.width = std::max(surface->GetSize().width, 48); + size.height = std::max(surface->GetSize().height, 48); + dataSurface = + Factory::CreateDataSourceSurface(size, SurfaceFormat::B8G8R8A8); + NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE); + + DataSourceSurface::MappedSurface map; + if (!dataSurface->Map(DataSourceSurface::MapType::WRITE, &map)) { + return NS_ERROR_FAILURE; + } + + RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData( + BackendType::CAIRO, map.mData, dataSurface->GetSize(), map.mStride, + dataSurface->GetFormat()); + if (!dt) { + gfxWarning() << "AsyncFaviconDataReady::OnComplete failed in " + "CreateDrawTargetForData"; + return NS_ERROR_OUT_OF_MEMORY; + } + dt->FillRect(Rect(0, 0, size.width, size.height), + ColorPattern(ToDeviceColor(sRGBColor::OpaqueWhite()))); + IntPoint point; + point.x = (size.width - surface->GetSize().width) / 2; + point.y = (size.height - surface->GetSize().height) / 2; + dt->DrawSurface(surface, + Rect(point.x, point.y, surface->GetSize().width, + surface->GetSize().height), + Rect(Point(0, 0), Size(surface->GetSize().width, + surface->GetSize().height))); + + dataSurface->Unmap(); + } else { + // By using the input image surface's size, we may end up encoding + // to a different size than a 16x16 (or bigger for higher DPI) ICO, but + // Windows will resize appropriately for us. If we want to encode ourselves + // one day because we like our resizing better, we'd have to manually + // resize the image here and use GetSystemMetrics w/ SM_CXSMICON and + // SM_CYSMICON. We don't support resizing images asynchronously at the + // moment anyway so getting the DPI aware icon size won't help. + size.width = surface->GetSize().width; + size.height = surface->GetSize().height; + dataSurface = surface->GetDataSurface(); + NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE); + } + + // Allocate a new buffer that we own and can use out of line in + // another thread. + UniquePtr<uint8_t[]> data = SurfaceToPackedBGRA(dataSurface); + if (!data) { + return NS_ERROR_OUT_OF_MEMORY; + } + int32_t stride = 4 * size.width; + + // AsyncEncodeAndWriteIcon takes ownership of the heap allocated buffer + nsCOMPtr<nsIRunnable> event = + new AsyncEncodeAndWriteIcon(path, std::move(data), stride, size.width, + size.height, mRunnable.forget()); + mIOThread->Dispatch(event, NS_DISPATCH_NORMAL); + + return NS_OK; +} +#endif + +// Warning: AsyncEncodeAndWriteIcon assumes ownership of the aData buffer passed +// in +AsyncEncodeAndWriteIcon::AsyncEncodeAndWriteIcon( + const nsAString& aIconPath, UniquePtr<uint8_t[]> aBuffer, uint32_t aStride, + uint32_t aWidth, uint32_t aHeight, already_AddRefed<nsIRunnable> aRunnable) + : mIconPath(aIconPath), + mBuffer(std::move(aBuffer)), + mRunnable(aRunnable), + mStride(aStride), + mWidth(aWidth), + mHeight(aHeight) {} + +NS_IMETHODIMP AsyncEncodeAndWriteIcon::Run() { + MOZ_ASSERT(!NS_IsMainThread(), "Should not be called on the main thread."); + + // Note that since we're off the main thread we can't use + // gfxPlatform::GetPlatform()->ScreenReferenceDrawTarget() + RefPtr<DataSourceSurface> surface = Factory::CreateWrappingDataSourceSurface( + mBuffer.get(), mStride, IntSize(mWidth, mHeight), + SurfaceFormat::B8G8R8A8); + + FILE* file = _wfopen(mIconPath.get(), L"wb"); + if (!file) { + // Maybe the directory doesn't exist; try creating it, then fopen again. + nsresult rv = NS_ERROR_FAILURE; + nsCOMPtr<nsIFile> comFile = do_CreateInstance("@mozilla.org/file/local;1"); + if (comFile) { + rv = comFile->InitWithPath(mIconPath); + if (NS_SUCCEEDED(rv)) { + nsCOMPtr<nsIFile> dirPath; + comFile->GetParent(getter_AddRefs(dirPath)); + if (dirPath) { + rv = dirPath->Create(nsIFile::DIRECTORY_TYPE, 0777); + if (NS_SUCCEEDED(rv) || rv == NS_ERROR_FILE_ALREADY_EXISTS) { + file = _wfopen(mIconPath.get(), L"wb"); + if (!file) { + rv = NS_ERROR_FAILURE; + } + } + } + } + } + if (!file) { + return rv; + } + } + nsresult rv = gfxUtils::EncodeSourceSurface(surface, ImageType::ICO, u""_ns, + gfxUtils::eBinaryEncode, file); + fclose(file); + NS_ENSURE_SUCCESS(rv, rv); + + if (mRunnable) { + mRunnable->Run(); + } + return rv; +} + +AsyncEncodeAndWriteIcon::~AsyncEncodeAndWriteIcon() {} + +AsyncDeleteAllFaviconsFromDisk::AsyncDeleteAllFaviconsFromDisk( + bool aIgnoreRecent) + : mIgnoreRecent(aIgnoreRecent) { + // We can't call FaviconHelper::GetICOCacheSecondsTimeout() on non-main + // threads, as it reads a pref, so cache its value here. + mIcoNoDeleteSeconds = FaviconHelper::GetICOCacheSecondsTimeout() + 600; + + // Prepare the profile directory cache on the main thread, to ensure we wont + // do this on non-main threads. + Unused << NS_GetSpecialDirectory("ProfLDS", + getter_AddRefs(mJumpListCacheDir)); +} + +NS_IMETHODIMP AsyncDeleteAllFaviconsFromDisk::Run() { + if (!mJumpListCacheDir) { + return NS_ERROR_FAILURE; + } + // Construct the path of our jump list cache + nsresult rv = mJumpListCacheDir->AppendNative( + nsDependentCString(FaviconHelper::kJumpListCacheDir)); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsIDirectoryEnumerator> entries; + rv = mJumpListCacheDir->GetDirectoryEntries(getter_AddRefs(entries)); + NS_ENSURE_SUCCESS(rv, rv); + + // Loop through each directory entry and remove all ICO files found + do { + nsCOMPtr<nsIFile> currFile; + if (NS_FAILED(entries->GetNextFile(getter_AddRefs(currFile))) || !currFile) + break; + + nsAutoString path; + if (NS_FAILED(currFile->GetPath(path))) continue; + + if (StringTail(path, 4).LowerCaseEqualsASCII(".ico")) { + // Check if the cached ICO file exists + bool exists; + if (NS_FAILED(currFile->Exists(&exists)) || !exists) continue; + + if (mIgnoreRecent) { + // Check to make sure the icon wasn't just recently created. + // If it was created recently, don't delete it yet. + int64_t fileModTime = 0; + rv = currFile->GetLastModifiedTime(&fileModTime); + fileModTime /= PR_MSEC_PER_SEC; + // If the icon is older than the regeneration time (+ 10 min to be + // safe), then it's old and we can get rid of it. + // This code is only hit directly after a regeneration. + int64_t nowTime = PR_Now() / int64_t(PR_USEC_PER_SEC); + if (NS_FAILED(rv) || (nowTime - fileModTime) < mIcoNoDeleteSeconds) { + continue; + } + } + + // We found an ICO file that exists, so we should remove it + currFile->Remove(false); + } + } while (true); + + return NS_OK; +} + +AsyncDeleteAllFaviconsFromDisk::~AsyncDeleteAllFaviconsFromDisk() {} + +/* + * (static) If the data is available, will return the path on disk where + * the favicon for page aFaviconPageURI is stored. If the favicon does not + * exist, or its cache is expired, this method will kick off an async request + * for the icon so that next time the method is called it will be available. + * @param aFaviconPageURI The URI of the page to obtain + * @param aICOFilePath The path of the icon file + * @param aIOThread The thread to perform the Fetch on + * @param aURLShortcut to distinguish between jumplistcache(false) and + * shortcutcache(true) + * @param aRunnable Executed in the aIOThread when the favicon cache is + * avaiable + */ +nsresult FaviconHelper::ObtainCachedIconFile( + nsCOMPtr<nsIURI> aFaviconPageURI, nsString& aICOFilePath, + RefPtr<LazyIdleThread>& aIOThread, bool aURLShortcut, + already_AddRefed<nsIRunnable> aRunnable) { + nsCOMPtr<nsIRunnable> runnable = aRunnable; + // Obtain the ICO file path + nsCOMPtr<nsIFile> icoFile; + nsresult rv = GetOutputIconPath(aFaviconPageURI, icoFile, aURLShortcut); + NS_ENSURE_SUCCESS(rv, rv); + + // Check if the cached ICO file already exists + bool exists; + rv = icoFile->Exists(&exists); + NS_ENSURE_SUCCESS(rv, rv); + + if (exists) { + // Obtain the file's last modification date in seconds + int64_t fileModTime = 0; + rv = icoFile->GetLastModifiedTime(&fileModTime); + fileModTime /= PR_MSEC_PER_SEC; + int32_t icoReCacheSecondsTimeout = GetICOCacheSecondsTimeout(); + int64_t nowTime = PR_Now() / int64_t(PR_USEC_PER_SEC); + + // If the last mod call failed or the icon is old then re-cache it + // This check is in case the favicon of a page changes + // the next time we try to build the jump list, the data will be available. + if (NS_FAILED(rv) || (nowTime - fileModTime) > icoReCacheSecondsTimeout) { + CacheIconFileFromFaviconURIAsync(aFaviconPageURI, icoFile, aIOThread, + aURLShortcut, runnable.forget()); + return NS_ERROR_NOT_AVAILABLE; + } + } else { + // The file does not exist yet, obtain it async from the favicon service so + // that the next time we try to build the jump list it'll be available. + CacheIconFileFromFaviconURIAsync(aFaviconPageURI, icoFile, aIOThread, + aURLShortcut, runnable.forget()); + return NS_ERROR_NOT_AVAILABLE; + } + + // The icoFile is filled with a path that exists, get its path + rv = icoFile->GetPath(aICOFilePath); + return rv; +} + +// Hash a URI using a cryptographic hash function (currently SHA-256) +// Output will be a base64-encoded string of the hash. +static nsresult HashURI(nsIURI* aUri, nsACString& aUriHash) { + nsAutoCString spec; + nsresult rv = aUri->GetSpec(spec); + NS_ENSURE_SUCCESS(rv, rv); + + nsCOMPtr<nsICryptoHash> cryptoHash = + do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + rv = cryptoHash->Init(nsICryptoHash::SHA256); + NS_ENSURE_SUCCESS(rv, rv); + + // Add some context to the hash to even further reduce the chances of + // collision. Note that we are hashing this string with its null-terminator. + const char kHashUriContext[] = "firefox-uri"; + rv = cryptoHash->Update(reinterpret_cast<const uint8_t*>(kHashUriContext), + sizeof(kHashUriContext)); + NS_ENSURE_SUCCESS(rv, rv); + + rv = cryptoHash->Update(reinterpret_cast<const uint8_t*>(spec.BeginReading()), + spec.Length()); + NS_ENSURE_SUCCESS(rv, rv); + + rv = cryptoHash->Finish(true, aUriHash); + NS_ENSURE_SUCCESS(rv, rv); + + return NS_OK; +} + +// (static) Obtains the ICO file for the favicon at page aFaviconPageURI +// If successful, the file path on disk is in the format: +// <ProfLDS>\jumpListCache\<hash(aFaviconPageURI)>.ico +// +// We generate the name with a cryptographically secure hash function in order +// to ensure that malicious websites can't intentionally craft URLs to collide +// with legitimate websites. +nsresult FaviconHelper::GetOutputIconPath(nsCOMPtr<nsIURI> aFaviconPageURI, + nsCOMPtr<nsIFile>& aICOFile, + bool aURLShortcut) { + nsAutoCString inputURIHash; + nsresult rv = HashURI(aFaviconPageURI, inputURIHash); + NS_ENSURE_SUCCESS(rv, rv); + char* cur = inputURIHash.BeginWriting(); + char* end = inputURIHash.EndWriting(); + for (; cur < end; ++cur) { + if ('/' == *cur) { + *cur = '_'; + } + } + + // Obtain the local profile directory and construct the output icon file path + rv = NS_GetSpecialDirectory("ProfLDS", getter_AddRefs(aICOFile)); + NS_ENSURE_SUCCESS(rv, rv); + if (!aURLShortcut) + rv = aICOFile->AppendNative(nsDependentCString(kJumpListCacheDir)); + else + rv = aICOFile->AppendNative(nsDependentCString(kShortcutCacheDir)); + NS_ENSURE_SUCCESS(rv, rv); + + // Append the icon extension + inputURIHash.AppendLiteral(".ico"); + rv = aICOFile->AppendNative(inputURIHash); + + return rv; +} + +// (static) Asynchronously creates a cached ICO file on disk for the favicon of +// page aFaviconPageURI and stores it to disk at the path of aICOFile. +nsresult FaviconHelper::CacheIconFileFromFaviconURIAsync( + nsCOMPtr<nsIURI> aFaviconPageURI, nsCOMPtr<nsIFile> aICOFile, + RefPtr<LazyIdleThread>& aIOThread, bool aURLShortcut, + already_AddRefed<nsIRunnable> aRunnable) { + nsCOMPtr<nsIRunnable> runnable = aRunnable; +#ifdef MOZ_PLACES + // Obtain the favicon service and get the favicon for the specified page + nsCOMPtr<nsIFaviconService> favIconSvc( + do_GetService("@mozilla.org/browser/favicon-service;1")); + NS_ENSURE_TRUE(favIconSvc, NS_ERROR_FAILURE); + + nsCOMPtr<nsIFaviconDataCallback> callback = + new mozilla::widget::AsyncFaviconDataReady( + aFaviconPageURI, aIOThread, aURLShortcut, runnable.forget()); + + favIconSvc->GetFaviconDataForPage(aFaviconPageURI, callback, 0); +#endif + return NS_OK; +} + +// Obtains the jump list 'ICO cache timeout in seconds' pref +int32_t FaviconHelper::GetICOCacheSecondsTimeout() { + // Only obtain the setting at most once from the pref service. + // In the rare case that 2 threads call this at the same + // time it is no harm and we will simply obtain the pref twice. + // None of the taskbar list prefs are currently updated via a + // pref observer so I think this should suffice. + const int32_t kSecondsPerDay = 86400; + static bool alreadyObtained = false; + static int32_t icoReCacheSecondsTimeout = kSecondsPerDay; + if (alreadyObtained) { + return icoReCacheSecondsTimeout; + } + + // Obtain the pref + const char PREF_ICOTIMEOUT[] = "browser.taskbar.lists.icoTimeoutInSeconds"; + icoReCacheSecondsTimeout = + Preferences::GetInt(PREF_ICOTIMEOUT, kSecondsPerDay); + alreadyObtained = true; + return icoReCacheSecondsTimeout; +} + +/* static */ +LayoutDeviceIntRegion WinUtils::ConvertHRGNToRegion(HRGN aRgn) { + NS_ASSERTION(aRgn, "Don't pass NULL region here"); + + LayoutDeviceIntRegion rgn; + + DWORD size = ::GetRegionData(aRgn, 0, nullptr); + AutoTArray<uint8_t, 100> buffer; + buffer.SetLength(size); + + RGNDATA* data = reinterpret_cast<RGNDATA*>(buffer.Elements()); + if (!::GetRegionData(aRgn, size, data)) return rgn; + + if (data->rdh.nCount > MAX_RECTS_IN_REGION) { + rgn = ToIntRect(data->rdh.rcBound); + return rgn; + } + + RECT* rects = reinterpret_cast<RECT*>(data->Buffer); + for (uint32_t i = 0; i < data->rdh.nCount; ++i) { + RECT* r = rects + i; + rgn.Or(rgn, ToIntRect(*r)); + } + + return rgn; +} + +LayoutDeviceIntRect WinUtils::ToIntRect(const RECT& aRect) { + return LayoutDeviceIntRect(aRect.left, aRect.top, aRect.right - aRect.left, + aRect.bottom - aRect.top); +} + +/* static */ +bool WinUtils::IsIMEEnabled(const InputContext& aInputContext) { + return IsIMEEnabled(aInputContext.mIMEState.mEnabled); +} + +/* static */ +bool WinUtils::IsIMEEnabled(IMEEnabled aIMEState) { + return aIMEState == IMEEnabled::Enabled; +} + +/* static */ +void WinUtils::SetupKeyModifiersSequence(nsTArray<KeyPair>* aArray, + uint32_t aModifiers, UINT aMessage) { + MOZ_ASSERT(!(aModifiers & nsIWidget::ALTGRAPH) || + !(aModifiers & (nsIWidget::CTRL_L | nsIWidget::ALT_R))); + if (aMessage == WM_KEYUP) { + // If AltGr is released, ControlLeft key is released first, then, + // AltRight key is released. + if (aModifiers & nsIWidget::ALTGRAPH) { + aArray->AppendElement( + KeyPair(VK_CONTROL, VK_LCONTROL, ScanCode::eControlLeft)); + aArray->AppendElement(KeyPair(VK_MENU, VK_RMENU, ScanCode::eAltRight)); + } + for (uint32_t i = ArrayLength(sModifierKeyMap); i; --i) { + const uint32_t* map = sModifierKeyMap[i - 1]; + if (aModifiers & map[0]) { + aArray->AppendElement(KeyPair(map[1], map[2], map[3])); + } + } + } else { + for (uint32_t i = 0; i < ArrayLength(sModifierKeyMap); ++i) { + const uint32_t* map = sModifierKeyMap[i]; + if (aModifiers & map[0]) { + aArray->AppendElement(KeyPair(map[1], map[2], map[3])); + } + } + // If AltGr is pressed, ControlLeft key is pressed first, then, + // AltRight key is pressed. + if (aModifiers & nsIWidget::ALTGRAPH) { + aArray->AppendElement( + KeyPair(VK_CONTROL, VK_LCONTROL, ScanCode::eControlLeft)); + aArray->AppendElement(KeyPair(VK_MENU, VK_RMENU, ScanCode::eAltRight)); + } + } +} + +/* static */ +nsresult WinUtils::WriteBitmap(nsIFile* aFile, imgIContainer* aImage) { + RefPtr<SourceSurface> surface = aImage->GetFrame( + imgIContainer::FRAME_FIRST, + imgIContainer::FLAG_SYNC_DECODE | imgIContainer::FLAG_ASYNC_NOTIFY); + NS_ENSURE_TRUE(surface, NS_ERROR_FAILURE); + + return WriteBitmap(aFile, surface); +} + +/* static */ +nsresult WinUtils::WriteBitmap(nsIFile* aFile, SourceSurface* surface) { + nsresult rv; + + // For either of the following formats we want to set the biBitCount member + // of the BITMAPINFOHEADER struct to 32, below. For that value the bitmap + // format defines that the A8/X8 WORDs in the bitmap byte stream be ignored + // for the BI_RGB value we use for the biCompression member. + MOZ_ASSERT(surface->GetFormat() == SurfaceFormat::B8G8R8A8 || + surface->GetFormat() == SurfaceFormat::B8G8R8X8); + + RefPtr<DataSourceSurface> dataSurface = surface->GetDataSurface(); + NS_ENSURE_TRUE(dataSurface, NS_ERROR_FAILURE); + + int32_t width = dataSurface->GetSize().width; + int32_t height = dataSurface->GetSize().height; + int32_t bytesPerPixel = 4 * sizeof(uint8_t); + uint32_t bytesPerRow = bytesPerPixel * width; + bool hasAlpha = surface->GetFormat() == SurfaceFormat::B8G8R8A8; + + // initialize these bitmap structs which we will later + // serialize directly to the head of the bitmap file + BITMAPV4HEADER bmi; + memset(&bmi, 0, sizeof(BITMAPV4HEADER)); + bmi.bV4Size = sizeof(BITMAPV4HEADER); + bmi.bV4Width = width; + bmi.bV4Height = height; + bmi.bV4Planes = 1; + bmi.bV4BitCount = (WORD)bytesPerPixel * 8; + bmi.bV4V4Compression = hasAlpha ? BI_BITFIELDS : BI_RGB; + bmi.bV4SizeImage = bytesPerRow * height; + bmi.bV4CSType = LCS_sRGB; + if (hasAlpha) { + bmi.bV4RedMask = 0x00FF0000; + bmi.bV4GreenMask = 0x0000FF00; + bmi.bV4BlueMask = 0x000000FF; + bmi.bV4AlphaMask = 0xFF000000; + } + + BITMAPFILEHEADER bf; + DWORD colormask[3]; + bf.bfType = 0x4D42; // 'BM' + bf.bfReserved1 = 0; + bf.bfReserved2 = 0; + bf.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPV4HEADER) + + (hasAlpha ? sizeof(colormask) : 0); + bf.bfSize = bf.bfOffBits + bmi.bV4SizeImage; + + // get a file output stream + nsCOMPtr<nsIOutputStream> stream; + rv = NS_NewLocalFileOutputStream(getter_AddRefs(stream), aFile); + NS_ENSURE_SUCCESS(rv, rv); + + DataSourceSurface::MappedSurface map; + if (!dataSurface->Map(DataSourceSurface::MapType::READ, &map)) { + return NS_ERROR_FAILURE; + } + + // write the bitmap headers and rgb pixel data to the file + rv = NS_ERROR_FAILURE; + if (stream) { + uint32_t written; + stream->Write((const char*)&bf, sizeof(BITMAPFILEHEADER), &written); + if (written == sizeof(BITMAPFILEHEADER)) { + stream->Write((const char*)&bmi, sizeof(BITMAPV4HEADER), &written); + if (written == sizeof(BITMAPV4HEADER)) { + if (hasAlpha) { + // color mask + colormask[0] = 0x00FF0000; + colormask[1] = 0x0000FF00; + colormask[2] = 0x000000FF; + + stream->Write((const char*)colormask, sizeof(colormask), &written); + } + if (!hasAlpha || written == sizeof(colormask)) { + // write out the image data backwards because the desktop won't + // show bitmaps with negative heights for top-to-bottom + uint32_t i = map.mStride * height; + do { + i -= map.mStride; + stream->Write(((const char*)map.mData) + i, bytesPerRow, &written); + if (written == bytesPerRow) { + rv = NS_OK; + } else { + rv = NS_ERROR_FAILURE; + break; + } + } while (i != 0); + } + } + } + + stream->Close(); + } + + dataSurface->Unmap(); + + return rv; +} + +// This is in use here and in dom/events/TouchEvent.cpp +/* static */ +uint32_t WinUtils::IsTouchDeviceSupportPresent() { + int32_t touchCapabilities = ::GetSystemMetrics(SM_DIGITIZER); + int32_t touchFlags = NID_EXTERNAL_TOUCH | NID_INTEGRATED_TOUCH; + if (StaticPrefs::dom_w3c_pointer_events_scroll_by_pen_enabled()) { + touchFlags |= NID_EXTERNAL_PEN | NID_INTEGRATED_PEN; + } + return (touchCapabilities & NID_READY) && (touchCapabilities & touchFlags); +} + +/* static */ +uint32_t WinUtils::GetMaxTouchPoints() { + if (IsTouchDeviceSupportPresent()) { + return GetSystemMetrics(SM_MAXIMUMTOUCHES); + } + return 0; +} + +/* static */ +POWER_PLATFORM_ROLE +WinUtils::GetPowerPlatformRole() { + typedef POWER_PLATFORM_ROLE(WINAPI * + PowerDeterminePlatformRoleEx)(ULONG Version); + static PowerDeterminePlatformRoleEx power_determine_platform_role = + reinterpret_cast<PowerDeterminePlatformRoleEx>(::GetProcAddress( + ::LoadLibraryW(L"PowrProf.dll"), "PowerDeterminePlatformRoleEx")); + + POWER_PLATFORM_ROLE powerPlatformRole = PlatformRoleUnspecified; + if (!power_determine_platform_role) { + return powerPlatformRole; + } + + return power_determine_platform_role(POWER_PLATFORM_ROLE_V2); +} + +// static +bool WinUtils::GetAutoRotationState(AR_STATE* aRotationState) { + typedef BOOL(WINAPI * GetAutoRotationStateFunc)(PAR_STATE pState); + static GetAutoRotationStateFunc get_auto_rotation_state_func = + reinterpret_cast<GetAutoRotationStateFunc>(::GetProcAddress( + GetModuleHandleW(L"user32.dll"), "GetAutoRotationState")); + if (get_auto_rotation_state_func) { + ZeroMemory(aRotationState, sizeof(AR_STATE)); + return get_auto_rotation_state_func(aRotationState); + } + return false; +} + +// static +void WinUtils::GetClipboardFormatAsString(UINT aFormat, nsAString& aOutput) { + wchar_t buf[256] = {}; + // Get registered format name and ensure the existence of a terminating '\0' + // if the registered name is more than 256 characters. + if (::GetClipboardFormatNameW(aFormat, buf, ARRAYSIZE(buf) - 1)) { + aOutput.Append(buf); + return; + } + // Standard clipboard formats + // https://learn.microsoft.com/en-us/windows/win32/dataxchg/standard-clipboard-formats + switch (aFormat) { + case CF_TEXT: // 1 + aOutput.Append(u"CF_TEXT"_ns); + break; + case CF_BITMAP: // 2 + aOutput.Append(u"CF_BITMAP"_ns); + break; + case CF_DIB: // 8 + aOutput.Append(u"CF_DIB"_ns); + break; + case CF_UNICODETEXT: // 13 + aOutput.Append(u"CF_UNICODETEXT"_ns); + break; + case CF_HDROP: // 15 + aOutput.Append(u"CF_HDROP"_ns); + break; + case CF_DIBV5: // 17 + aOutput.Append(u"CF_DIBV5"_ns); + break; + default: + aOutput.AppendPrintf("%u", aFormat); + break; + } +} + +static bool IsTabletDevice() { + // Guarantees that: + // - The device has a touch screen. + // - It is used as a tablet which means that it has no keyboard connected. + // On Windows 10 it means that it is verifying with ConvertibleSlateMode. + + if (WindowsUIUtils::GetInTabletMode()) { + return true; + } + + if (!GetSystemMetrics(SM_MAXIMUMTOUCHES)) { + return false; + } + + // If the device is docked, the user is treating the device as a PC. + if (GetSystemMetrics(SM_SYSTEMDOCKED)) { + return false; + } + + // If the device is not supporting rotation, it's unlikely to be a tablet, + // a convertible or a detachable. See: + // https://msdn.microsoft.com/en-us/library/windows/desktop/dn629263(v=vs.85).aspx + AR_STATE rotation_state; + if (WinUtils::GetAutoRotationState(&rotation_state) && + (rotation_state & (AR_NOT_SUPPORTED | AR_LAPTOP | AR_NOSENSOR))) { + return false; + } + + // PlatformRoleSlate was added in Windows 8+. + POWER_PLATFORM_ROLE role = WinUtils::GetPowerPlatformRole(); + if (role == PlatformRoleMobile || role == PlatformRoleSlate) { + return !GetSystemMetrics(SM_CONVERTIBLESLATEMODE); + } + return false; +} + +static bool SystemHasMouse() { + // As per MSDN, this value is rarely false because of virtual mice, and + // some machines report the existance of a mouse port as a mouse. + // + // We probably could try to distinguish if we wanted, but a virtual mouse + // might be there for a reason, and maybe we shouldn't assume we know + // better. + return !!::GetSystemMetrics(SM_MOUSEPRESENT); +} + +/* static */ +PointerCapabilities WinUtils::GetPrimaryPointerCapabilities() { + if (IsTabletDevice()) { + return PointerCapabilities::Coarse; + } + + if (SystemHasMouse()) { + return PointerCapabilities::Fine | PointerCapabilities::Hover; + } + + if (IsTouchDeviceSupportPresent()) { + return PointerCapabilities::Coarse; + } + + return PointerCapabilities::None; +} + +static bool SystemHasTouchscreen() { + int digitizerMetrics = ::GetSystemMetrics(SM_DIGITIZER); + return (digitizerMetrics & NID_INTEGRATED_TOUCH) || + (digitizerMetrics & NID_EXTERNAL_TOUCH); +} + +static bool SystemHasPenDigitizer() { + int digitizerMetrics = ::GetSystemMetrics(SM_DIGITIZER); + return (digitizerMetrics & NID_INTEGRATED_PEN) || + (digitizerMetrics & NID_EXTERNAL_PEN); +} + +/* static */ +PointerCapabilities WinUtils::GetAllPointerCapabilities() { + PointerCapabilities pointerCapabilities = PointerCapabilities::None; + + if (SystemHasTouchscreen()) { + pointerCapabilities |= PointerCapabilities::Coarse; + } + + if (SystemHasPenDigitizer() || SystemHasMouse()) { + pointerCapabilities |= + PointerCapabilities::Fine | PointerCapabilities::Hover; + } + + return pointerCapabilities; +} + +void WinUtils::GetPointerExplanation(nsAString* aExplanation) { + // To support localization, we will return a comma-separated list of + // Fluent IDs + *aExplanation = u"pointing-device-none"; + + bool first = true; + auto append = [&](const char16_t* str) { + if (first) { + aExplanation->Truncate(); + first = false; + } else { + aExplanation->Append(u","); + } + aExplanation->Append(str); + }; + + if (SystemHasTouchscreen()) { + append(u"pointing-device-touchscreen"); + } + + if (SystemHasPenDigitizer()) { + append(u"pointing-device-pen-digitizer"); + } + + if (SystemHasMouse()) { + append(u"pointing-device-mouse"); + } +} + +/* static */ +bool WinUtils::ResolveJunctionPointsAndSymLinks(std::wstring& aPath) { + LOG_D("ResolveJunctionPointsAndSymLinks: Resolving path: %S", aPath.c_str()); + + wchar_t path[MAX_PATH] = {0}; + + nsAutoHandle handle(::CreateFileW( + aPath.c_str(), 0, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, + nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr)); + + if (handle == INVALID_HANDLE_VALUE) { + LOG_E("Failed to open file handle to resolve path. GetLastError=%lu", + GetLastError()); + return false; + } + + DWORD pathLen = GetFinalPathNameByHandleW( + handle, path, MAX_PATH, FILE_NAME_NORMALIZED | VOLUME_NAME_DOS); + if (pathLen == 0 || pathLen >= MAX_PATH) { + LOG_E("GetFinalPathNameByHandleW failed. GetLastError=%lu", GetLastError()); + return false; + } + aPath = path; + + // GetFinalPathNameByHandle sticks a '\\?\' in front of the path, + // but that confuses some APIs so strip it off. It will also put + // '\\?\UNC\' in front of network paths, we convert that to '\\'. + if (aPath.compare(0, 7, L"\\\\?\\UNC") == 0) { + aPath.erase(2, 6); + } else if (aPath.compare(0, 4, L"\\\\?\\") == 0) { + aPath.erase(0, 4); + } + + LOG_D("ResolveJunctionPointsAndSymLinks: Resolved path to: %S", + aPath.c_str()); + return true; +} + +/* static */ +bool WinUtils::ResolveJunctionPointsAndSymLinks(nsIFile* aPath) { + MOZ_ASSERT(aPath); + + nsAutoString filePath; + nsresult rv = aPath->GetPath(filePath); + if (NS_WARN_IF(NS_FAILED(rv))) { + return false; + } + + std::wstring resolvedPath(filePath.get()); + if (!ResolveJunctionPointsAndSymLinks(resolvedPath)) { + return false; + } + + rv = aPath->InitWithPath(nsDependentString(resolvedPath.c_str())); + if (NS_WARN_IF(NS_FAILED(rv))) { + return false; + } + + return true; +} + +/* static */ +bool WinUtils::RunningFromANetworkDrive() { + wchar_t exePath[MAX_PATH]; + if (!::GetModuleFileNameW(nullptr, exePath, MAX_PATH)) { + return false; + } + + std::wstring exeString(exePath); + if (!widget::WinUtils::ResolveJunctionPointsAndSymLinks(exeString)) { + return false; + } + + wchar_t volPath[MAX_PATH]; + if (!::GetVolumePathNameW(exeString.c_str(), volPath, MAX_PATH)) { + return false; + } + + return (::GetDriveTypeW(volPath) == DRIVE_REMOTE); +} + +/* static */ +bool WinUtils::CanonicalizePath(nsAString& aPath) { + wchar_t tempPath[MAX_PATH + 1]; + if (!PathCanonicalizeW(tempPath, + (char16ptr_t)PromiseFlatString(aPath).get())) { + return false; + } + aPath = tempPath; + MOZ_ASSERT(aPath.Length() <= MAX_PATH); + return true; +} + +/* static */ +bool WinUtils::MakeLongPath(nsAString& aPath) { + wchar_t tempPath[MAX_PATH + 1]; + DWORD longResult = + GetLongPathNameW((char16ptr_t)PromiseFlatString(aPath).get(), tempPath, + ArrayLength(tempPath)); + if (longResult > ArrayLength(tempPath)) { + // Our buffer is too short, and we're guaranteeing <= MAX_PATH results. + return false; + } else if (longResult) { + // Success. + aPath = tempPath; + MOZ_ASSERT(aPath.Length() <= MAX_PATH); + } + // GetLongPathNameW returns 0 if the path is not found or is not rooted, + // but we shouldn't consider that a failure condition. + return true; +} + +/* static */ +bool WinUtils::UnexpandEnvVars(nsAString& aPath) { + wchar_t tempPath[MAX_PATH + 1]; + // PathUnExpandEnvStringsW returns false if it doesn't make any + // substitutions. Silently continue using the unaltered path. + if (PathUnExpandEnvStringsW((char16ptr_t)PromiseFlatString(aPath).get(), + tempPath, ArrayLength(tempPath))) { + aPath = tempPath; + MOZ_ASSERT(aPath.Length() <= MAX_PATH); + } + return true; +} + +/* static */ +WinUtils::WhitelistVec WinUtils::BuildWhitelist() { + WhitelistVec result; + + Unused << result.emplaceBack( + std::make_pair(nsString(u"%ProgramFiles%"_ns), nsDependentString())); + + // When no substitution is required, set the void flag + result.back().second.SetIsVoid(true); + + Unused << result.emplaceBack( + std::make_pair(nsString(u"%SystemRoot%"_ns), nsDependentString())); + result.back().second.SetIsVoid(true); + + wchar_t tmpPath[MAX_PATH + 1] = {}; + if (GetTempPath(MAX_PATH, tmpPath)) { + // GetTempPath's result always ends with a backslash, which we don't want + uint32_t tmpPathLen = wcslen(tmpPath); + if (tmpPathLen) { + tmpPath[tmpPathLen - 1] = 0; + } + + nsAutoString cleanTmpPath(tmpPath); + if (UnexpandEnvVars(cleanTmpPath)) { + constexpr auto tempVar = u"%TEMP%"_ns; + Unused << result.emplaceBack(std::make_pair( + nsString(cleanTmpPath), nsDependentString(tempVar, 0))); + } + } + + // If we add more items to the whitelist, ensure we still don't invoke an + // unnecessary heap allocation. + MOZ_ASSERT(result.length() <= kMaxWhitelistedItems); + + return result; +} + +/** + * This function provides an array of (system path, substitution) pairs that are + * considered to be acceptable with respect to privacy, for the purposes of + * submitting within telemetry or crash reports. + * + * The substitution string's void flag may be set. If it is, no subsitution is + * necessary. Otherwise, the consumer should replace the system path with the + * substitution. + * + * @see PreparePathForTelemetry for an example of its usage. + */ +/* static */ +const WinUtils::WhitelistVec& WinUtils::GetWhitelistedPaths() { + static WhitelistVec sWhitelist([]() -> WhitelistVec { + auto setClearFn = [ptr = &sWhitelist]() -> void { + RunOnShutdown([ptr]() -> void { ptr->clear(); }, + ShutdownPhase::XPCOMShutdownFinal); + }; + + if (NS_IsMainThread()) { + setClearFn(); + } else { + SchedulerGroup::Dispatch(NS_NewRunnableFunction( + "WinUtils::GetWhitelistedPaths", std::move(setClearFn))); + } + + return BuildWhitelist(); + }()); + return sWhitelist; +} + +/** + * This function is located here (as opposed to nsSystemInfo or elsewhere) + * because we need to gather this information as early as possible during + * startup. + */ +/* static */ +bool WinUtils::GetAppInitDLLs(nsAString& aOutput) { + aOutput.Truncate(); + HKEY hkey = NULL; + if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, + L"SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Windows", + 0, KEY_QUERY_VALUE, &hkey)) { + return false; + } + nsAutoRegKey key(hkey); + LONG status; + const wchar_t kLoadAppInitDLLs[] = L"LoadAppInit_DLLs"; + DWORD loadAppInitDLLs = 0; + DWORD loadAppInitDLLsLen = sizeof(loadAppInitDLLs); + status = RegQueryValueExW(hkey, kLoadAppInitDLLs, nullptr, nullptr, + (LPBYTE)&loadAppInitDLLs, &loadAppInitDLLsLen); + if (status != ERROR_SUCCESS) { + return false; + } + if (!loadAppInitDLLs) { + // If loadAppInitDLLs is zero then AppInit_DLLs is disabled. + // In this case we'll return true along with an empty output string. + return true; + } + DWORD numBytes = 0; + const wchar_t kAppInitDLLs[] = L"AppInit_DLLs"; + // Query for required buffer size + status = RegQueryValueExW(hkey, kAppInitDLLs, nullptr, nullptr, nullptr, + &numBytes); + if (status != ERROR_SUCCESS) { + return false; + } + // Allocate the buffer and query for the actual data + mozilla::UniquePtr<wchar_t[]> data = + mozilla::MakeUnique<wchar_t[]>(numBytes / sizeof(wchar_t)); + status = RegQueryValueExW(hkey, kAppInitDLLs, nullptr, nullptr, + (LPBYTE)data.get(), &numBytes); + if (status != ERROR_SUCCESS) { + return false; + } + // For each token, split up the filename components and then check the + // name of the file. + const wchar_t kDelimiters[] = L", "; + wchar_t* tokenContext = nullptr; + wchar_t* token = wcstok_s(data.get(), kDelimiters, &tokenContext); + while (token) { + nsAutoString cleanPath(token); + // Since these paths are short paths originating from the registry, we need + // to canonicalize them, lengthen them, and sanitize them before we can + // check them against the whitelist + if (PreparePathForTelemetry(cleanPath)) { + if (!aOutput.IsEmpty()) { + aOutput += L";"; + } + aOutput += cleanPath; + } + token = wcstok_s(nullptr, kDelimiters, &tokenContext); + } + return true; +} + +/* static */ +bool WinUtils::PreparePathForTelemetry(nsAString& aPath, + PathTransformFlags aFlags) { + if (aFlags & PathTransformFlags::Canonicalize) { + if (!CanonicalizePath(aPath)) { + return false; + } + } + if (aFlags & PathTransformFlags::Lengthen) { + if (!MakeLongPath(aPath)) { + return false; + } + } + if (aFlags & PathTransformFlags::UnexpandEnvVars) { + if (!UnexpandEnvVars(aPath)) { + return false; + } + } + + const WhitelistVec& whitelistedPaths = GetWhitelistedPaths(); + + for (uint32_t i = 0; i < whitelistedPaths.length(); ++i) { + const nsString& testPath = whitelistedPaths[i].first; + const nsDependentString& substitution = whitelistedPaths[i].second; + if (StringBeginsWith(aPath, testPath, nsCaseInsensitiveStringComparator)) { + if (!substitution.IsVoid()) { + aPath.Replace(0, testPath.Length(), substitution); + } + return true; + } + } + + // For non-whitelisted paths, we strip the path component and just leave + // the filename. We can't use nsLocalFile to do this because these paths may + // begin with environment variables, and nsLocalFile doesn't like + // non-absolute paths. + const nsString& flatPath = PromiseFlatString(aPath); + LPCWSTR leafStart = ::PathFindFileNameW(flatPath.get()); + ptrdiff_t cutLen = leafStart - flatPath.get(); + if (cutLen) { + aPath.Cut(0, cutLen); + } else if (aFlags & PathTransformFlags::RequireFilePath) { + return false; + } + + return true; +} + +nsString WinUtils::GetPackageFamilyName() { + nsString rv; + + UniquePtr<wchar_t[]> packageIdentity = mozilla::GetPackageFamilyName(); + if (packageIdentity) { + rv = packageIdentity.get(); + } + + return rv; +} + +bool WinUtils::GetClassName(HWND aHwnd, nsAString& aClassName) { + const int bufferLength = 256; + aClassName.SetLength(bufferLength); + + int length = ::GetClassNameW(aHwnd, (char16ptr_t)aClassName.BeginWriting(), + bufferLength); + if (length == 0) { + return false; + } + MOZ_RELEASE_ASSERT(length <= (bufferLength - 1)); + aClassName.Truncate(length); + return true; +} + +static BOOL CALLBACK EnumUpdateWindowOcclusionProc(HWND aHwnd, LPARAM aLParam) { + const bool* const enable = reinterpret_cast<bool*>(aLParam); + nsWindow* window = WinUtils::GetNSWindowPtr(aHwnd); + if (window) { + window->MaybeEnableWindowOcclusion(*enable); + } + return TRUE; +} + +void WinUtils::EnableWindowOcclusion(const bool aEnable) { + if (aEnable) { + WinWindowOcclusionTracker::Ensure(); + } + ::EnumWindows(EnumUpdateWindowOcclusionProc, + reinterpret_cast<LPARAM>(&aEnable)); +} + +bool WinUtils::GetTimezoneName(wchar_t* aBuffer) { + DYNAMIC_TIME_ZONE_INFORMATION tzInfo; + DWORD tzid = GetDynamicTimeZoneInformation(&tzInfo); + + if (tzid == TIME_ZONE_ID_INVALID) { + return false; + } + + wcscpy_s(aBuffer, 128, tzInfo.TimeZoneKeyName); + + return true; +} + +// There are undocumented APIs to query/change the system DPI settings found by +// https://github.com/lihas/ . We use those APIs only for testing purpose, i.e. +// in mochitests or some such. To avoid exposing them in our official release +// builds unexpectedly we restrict them only in debug builds. +#ifdef DEBUG + +# define DISPLAYCONFIG_DEVICE_INFO_SET_SOURCE_DPI_SCALE (int)-4 +# define DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_DPI_SCALE (int)-3 + +// Following two struts are copied from +// https://github.com/lihas/windows-DPI-scaling-sample/blob/master/DPIHelper/DpiHelper.h + +/* + * struct DISPLAYCONFIG_SOURCE_DPI_SCALE_GET + * @brief used to fetch min, max, suggested, and currently applied DPI scaling + * values. All values are relative to the recommended DPI scaling value Note + * that DPI scaling is a property of the source, and not of target. + */ +struct DISPLAYCONFIG_SOURCE_DPI_SCALE_GET { + DISPLAYCONFIG_DEVICE_INFO_HEADER header; + /* + * @brief min value of DPI scaling is always 100, minScaleRel gives no. of + * steps down from recommended scaling eg. if minScaleRel is -3 => 100 is 3 + * steps down from recommended scaling => recommended scaling is 175% + */ + int32_t minScaleRel; + + /* + * @brief currently applied DPI scaling value wrt the recommended value. eg. + * if recommended value is 175%, + * => if curScaleRel == 0 the current scaling is 175%, if curScaleRel == -1, + * then current scale is 150% + */ + int32_t curScaleRel; + + /* + * @brief maximum supported DPI scaling wrt recommended value + */ + int32_t maxScaleRel; +}; + +/* + * struct DISPLAYCONFIG_SOURCE_DPI_SCALE_SET + * @brief set DPI scaling value of a source + * Note that DPI scaling is a property of the source, and not of target. + */ +struct DISPLAYCONFIG_SOURCE_DPI_SCALE_SET { + DISPLAYCONFIG_DEVICE_INFO_HEADER header; + /* + * @brief The value we want to set. The value should be relative to the + * recommended DPI scaling value of source. eg. if scaleRel == 1, and + * recommended value is 175% => we are trying to set 200% scaling for the + * source + */ + int32_t scaleRel; +}; + +static int32_t sCurRelativeScaleStep = std::numeric_limits<int32_t>::max(); + +static LONG SetRelativeScaleStep(LUID aAdapterId, int32_t aRelativeScaleStep) { + DISPLAYCONFIG_SOURCE_DPI_SCALE_SET setDPIScale = {}; + setDPIScale.header.adapterId = aAdapterId; + setDPIScale.header.type = (DISPLAYCONFIG_DEVICE_INFO_TYPE) + DISPLAYCONFIG_DEVICE_INFO_SET_SOURCE_DPI_SCALE; + setDPIScale.header.size = sizeof(setDPIScale); + setDPIScale.scaleRel = aRelativeScaleStep; + + return DisplayConfigSetDeviceInfo(&setDPIScale.header); +} + +nsresult WinUtils::SetHiDPIMode(bool aHiDPI) { + auto config = GetDisplayConfig(); + if (!config) { + return NS_ERROR_NOT_AVAILABLE; + } + + if (config->mPaths.empty()) { + return NS_ERROR_NOT_AVAILABLE; + } + + DISPLAYCONFIG_SOURCE_DPI_SCALE_GET dpiScale = {}; + dpiScale.header.adapterId = config->mPaths[0].targetInfo.adapterId; + dpiScale.header.type = (DISPLAYCONFIG_DEVICE_INFO_TYPE) + DISPLAYCONFIG_DEVICE_INFO_GET_SOURCE_DPI_SCALE; + dpiScale.header.size = sizeof(dpiScale); + LONG result = ::DisplayConfigGetDeviceInfo(&dpiScale.header); + if (result != ERROR_SUCCESS) { + return NS_ERROR_FAILURE; + } + + if (dpiScale.minScaleRel == dpiScale.maxScaleRel) { + // We can't change the setting at all. + return NS_ERROR_NOT_AVAILABLE; + } + + if (aHiDPI && dpiScale.curScaleRel == dpiScale.maxScaleRel) { + // We've already at the maximum level. + if (sCurRelativeScaleStep == std::numeric_limits<int32_t>::max()) { + sCurRelativeScaleStep = dpiScale.curScaleRel; + } + return NS_OK; + } + + if (!aHiDPI && dpiScale.curScaleRel == dpiScale.minScaleRel) { + // We've already at the minimum level. + if (sCurRelativeScaleStep == std::numeric_limits<int32_t>::max()) { + sCurRelativeScaleStep = dpiScale.curScaleRel; + } + return NS_OK; + } + + result = SetRelativeScaleStep( + config->mPaths[0].targetInfo.adapterId, + aHiDPI ? dpiScale.maxScaleRel : dpiScale.minScaleRel); + if (result != ERROR_SUCCESS) { + return NS_ERROR_FAILURE; + } + + if (sCurRelativeScaleStep == std::numeric_limits<int>::max()) { + sCurRelativeScaleStep = dpiScale.curScaleRel; + } + + return NS_OK; +} + +nsresult WinUtils::RestoreHiDPIMode() { + if (sCurRelativeScaleStep == std::numeric_limits<int>::max()) { + // The DPI setting hasn't been changed. + return NS_ERROR_UNEXPECTED; + } + + auto config = GetDisplayConfig(); + if (!config) { + return NS_ERROR_NOT_AVAILABLE; + } + + if (config->mPaths.empty()) { + return NS_ERROR_NOT_AVAILABLE; + } + + LONG result = SetRelativeScaleStep(config->mPaths[0].targetInfo.adapterId, + sCurRelativeScaleStep); + sCurRelativeScaleStep = std::numeric_limits<int32_t>::max(); + if (result != ERROR_SUCCESS) { + return NS_ERROR_FAILURE; + } + return NS_OK; +} +#endif + +/* static */ +const char* WinUtils::WinEventToEventName(UINT msg) { + const auto eventMsgInfo = mozilla::widget::gAllEvents.find(msg); + return eventMsgInfo != mozilla::widget::gAllEvents.end() + ? eventMsgInfo->second.mStr + : nullptr; +} + +// Note to testers and/or test-authors: on Windows 10, and possibly on other +// versions as well, supplying the `WS_EX_LAYOUTRTL` flag here has no effect +// whatsoever on child common-dialogs **unless the system UI locale is also set +// to an RTL language**. +// +// If it is, the flag is still required; otherwise, the picker dialog will be +// presented in English (or possibly some other LTR language) as a fallback. +ScopedRtlShimWindow::ScopedRtlShimWindow(nsIWidget* aParent) : mWnd(nullptr) { + NS_ENSURE_TRUE_VOID(aParent); + + // Headless windows don't have HWNDs, but also probably shouldn't be launching + // print dialogs. + HWND const hwnd = (HWND)aParent->GetNativeData(NS_NATIVE_WINDOW); + NS_ENSURE_TRUE_VOID(hwnd); + + nsWindow* const win = WinUtils::GetNSWindowPtr(hwnd); + NS_ENSURE_TRUE_VOID(win); + + ATOM const wclass = ::GetClassWord(hwnd, GCW_ATOM); + mWnd = ::CreateWindowExW( + win->IsRTL() ? WS_EX_LAYOUTRTL : 0, (LPCWSTR)(uintptr_t)wclass, L"", + WS_CHILD, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, + hwnd, nullptr, nsToolkit::mDllInstance, nullptr); + + MOZ_ASSERT(mWnd); +} + +ScopedRtlShimWindow::~ScopedRtlShimWindow() { + if (mWnd) { + ::DestroyWindow(mWnd); + } +} + +} // namespace widget +} // namespace mozilla |