diff options
Diffstat (limited to 'widget/windows/nsWindow.cpp')
| -rw-r--r-- | widget/windows/nsWindow.cpp | 9647 |
1 files changed, 9647 insertions, 0 deletions
diff --git a/widget/windows/nsWindow.cpp b/widget/windows/nsWindow.cpp new file mode 100644 index 0000000000..7f925a6ef8 --- /dev/null +++ b/widget/windows/nsWindow.cpp @@ -0,0 +1,9647 @@ +/* -*- 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/. */ + +/* + * nsWindow - Native window management and event handling. + * + * nsWindow is organized into a set of major blocks and + * block subsections. The layout is as follows: + * + * Includes + * Variables + * nsIWidget impl. + * nsIWidget methods and utilities + * nsSwitchToUIThread impl. + * nsSwitchToUIThread methods and utilities + * Moz events + * Event initialization + * Event dispatching + * Native events + * Wndproc(s) + * Event processing + * OnEvent event handlers + * IME management and accessibility + * Transparency + * Popup hook handling + * Misc. utilities + * Child window impl. + * + * Search for "BLOCK:" to find major blocks. + * Search for "SECTION:" to find specific sections. + * + * Blocks should be split out into separate files if they + * become unmanageable. + * + * Notable related sources: + * + * nsWindowDefs.h - Definitions, macros, structs, enums + * and general setup. + * nsWindowDbg.h/.cpp - Debug related code and directives. + * nsWindowGfx.h/.cpp - Graphics and painting. + * + */ + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Includes + ** + ** Include headers. + ** + ************************************************************** + **************************************************************/ + +#include "gfx2DGlue.h" +#include "gfxEnv.h" +#include "gfxPlatform.h" + +#include "mozilla/AppShutdown.h" +#include "mozilla/AutoRestore.h" +#include "mozilla/Likely.h" +#include "mozilla/PreXULSkeletonUI.h" +#include "mozilla/Logging.h" +#include "mozilla/MathAlgorithms.h" +#include "mozilla/MiscEvents.h" +#include "mozilla/MouseEvents.h" +#include "mozilla/PresShell.h" +#include "mozilla/ScopeExit.h" +#include "mozilla/StaticPrefs_browser.h" +#include "mozilla/SwipeTracker.h" +#include "mozilla/TouchEvents.h" +#include "mozilla/TimeStamp.h" + +#include "mozilla/ipc/MessageChannel.h" +#include <algorithm> +#include <limits> + +#include "nsWindow.h" +#include "nsWindowTaskbarConcealer.h" +#include "nsAppRunner.h" + +#include <shellapi.h> +#include <windows.h> +#include <wtsapi32.h> +#include <process.h> +#include <commctrl.h> +#include <dbt.h> +#include <unknwn.h> +#include <psapi.h> +#include <rpc.h> +#include <propvarutil.h> +#include <propkey.h> + +#include "mozilla/Logging.h" +#include "prtime.h" +#include "prenv.h" + +#include "mozilla/WidgetTraceEvent.h" +#include "nsContentUtils.h" +#include "nsISupportsPrimitives.h" +#include "nsITheme.h" +#include "nsIObserverService.h" +#include "nsIScreenManager.h" +#include "imgIContainer.h" +#include "nsIFile.h" +#include "nsIRollupListener.h" +#include "nsIClipboard.h" +#include "WinMouseScrollHandler.h" +#include "nsFontMetrics.h" +#include "nsIFontEnumerator.h" +#include "nsFont.h" +#include "nsRect.h" +#include "nsThreadUtils.h" +#include "nsNativeCharsetUtils.h" +#include "nsGkAtoms.h" +#include "nsCRT.h" +#include "nsAppDirectoryServiceDefs.h" +#include "nsWidgetsCID.h" +#include "nsTHashtable.h" +#include "nsHashKeys.h" +#include "nsString.h" +#include "mozilla/Components.h" +#include "nsNativeThemeWin.h" +#include "nsXULPopupManager.h" +#include "nsWindowsDllInterceptor.h" +#include "nsLayoutUtils.h" +#include "nsView.h" +#include "nsWindowGfx.h" +#include "gfxWindowsPlatform.h" +#include "gfxDWriteFonts.h" +#include "nsPrintfCString.h" +#include "mozilla/Preferences.h" +#include "SystemTimeConverter.h" +#include "WinTaskbar.h" +#include "WidgetUtils.h" +#include "WinWindowOcclusionTracker.h" +#include "nsIWidgetListener.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/MouseEventBinding.h" +#include "mozilla/dom/Touch.h" +#include "mozilla/gfx/2D.h" +#include "mozilla/gfx/GPUProcessManager.h" +#include "mozilla/intl/LocaleService.h" +#include "mozilla/layers/WebRenderLayerManager.h" +#include "mozilla/WindowsVersion.h" +#include "mozilla/TextEvents.h" // For WidgetKeyboardEvent +#include "mozilla/TextEventDispatcherListener.h" +#include "mozilla/widget/nsAutoRollup.h" +#include "mozilla/widget/PlatformWidgetTypes.h" +#include "mozilla/widget/Screen.h" +#include "nsStyleConsts.h" +#include "nsBidiKeyboard.h" +#include "nsStyleConsts.h" +#include "gfxConfig.h" +#include "InProcessWinCompositorWidget.h" +#include "InputDeviceUtils.h" +#include "ScreenHelperWin.h" +#include "mozilla/StaticPrefs_apz.h" +#include "mozilla/StaticPrefs_dom.h" +#include "mozilla/StaticPrefs_gfx.h" +#include "mozilla/StaticPrefs_layout.h" +#include "mozilla/StaticPrefs_widget.h" +#include "nsNativeAppSupportWin.h" +#include "mozilla/browser/NimbusFeatures.h" + +#include "nsIGfxInfo.h" +#include "nsUXThemeConstants.h" +#include "KeyboardLayout.h" +#include "nsNativeDragTarget.h" +#include <mmsystem.h> // needed for WIN32_LEAN_AND_MEAN +#include <zmouse.h> +#include <richedit.h> + +#if defined(ACCESSIBILITY) + +# ifdef DEBUG +# include "mozilla/a11y/Logging.h" +# endif + +# include "oleidl.h" +# include <winuser.h> +# include "nsAccessibilityService.h" +# include "mozilla/a11y/DocAccessible.h" +# include "mozilla/a11y/LazyInstantiator.h" +# include "mozilla/a11y/Platform.h" +# if !defined(WINABLEAPI) +# include <winable.h> +# endif // !defined(WINABLEAPI) +#endif // defined(ACCESSIBILITY) + +#include "WindowsUIUtils.h" + +#include "nsWindowDefs.h" + +#include "nsCrashOnException.h" + +#include "nsIContent.h" + +#include "mozilla/BackgroundHangMonitor.h" +#include "WinIMEHandler.h" + +#include "npapi.h" + +#include <d3d11.h> + +#include "InkCollector.h" + +// ERROR from wingdi.h (below) gets undefined by some code. +// #define ERROR 0 +// #define RGN_ERROR ERROR +#define ERROR 0 + +#if !defined(SM_CONVERTIBLESLATEMODE) +# define SM_CONVERTIBLESLATEMODE 0x2003 +#endif + +// Win 8.1+ (_WIN32_WINNT_WINBLUE) +#if !defined(WM_DPICHANGED) +# define WM_DPICHANGED 0x02E0 +#endif + +// Win 8+ (_WIN32_WINNT_WIN8) +#if !defined(EVENT_OBJECT_CLOAKED) +# define EVENT_OBJECT_CLOAKED 0x8017 +# define EVENT_OBJECT_UNCLOAKED 0x8018 +#endif + +#include "mozilla/gfx/DeviceManagerDx.h" +#include "mozilla/layers/APZInputBridge.h" +#include "mozilla/layers/InputAPZContext.h" +#include "mozilla/layers/KnowsCompositor.h" +#include "InputData.h" + +#include "mozilla/TaskController.h" +#include "mozilla/Telemetry.h" +#include "mozilla/webrender/WebRenderAPI.h" +#include "mozilla/layers/IAPZCTreeManager.h" + +#include "DirectManipulationOwner.h" + +using namespace mozilla; +using namespace mozilla::dom; +using namespace mozilla::gfx; +using namespace mozilla::layers; +using namespace mozilla::widget; +using namespace mozilla::plugins; + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Variables + ** + ** nsWindow Class static initializations and global variables. + ** + ************************************************************** + **************************************************************/ + +/************************************************************** + * + * SECTION: nsWindow statics + * + **************************************************************/ +static const wchar_t kUser32LibName[] = L"user32.dll"; + +uint32_t nsWindow::sInstanceCount = 0; +bool nsWindow::sIsOleInitialized = false; +nsIWidget::Cursor nsWindow::sCurrentCursor = {}; +nsWindow* nsWindow::sCurrentWindow = nullptr; +bool nsWindow::sJustGotDeactivate = false; +bool nsWindow::sJustGotActivate = false; +bool nsWindow::sIsInMouseCapture = false; + +// Urgent-message reentrancy depth for the static `WindowProc` callback. +// +// Three unfortunate facts collide: +// +// 𝛼) Some messages must be processed promptly. If not, Windows will leave the +// receiving window in an intermediate, and potentially unusable, state until +// the WindowProc invocation that is handling it returns. +// +// 𝛽) Some messages have indefinitely long processing time. These are mostly +// messages which may cause us to enter a nested modal loop (via +// `SpinEventLoopUntil` or similar). +// +// 𝛾) Sometimes, messages skip the queue entirely. Our `WindowProc` may be +// reentrantly reinvoked from the kernel while we're blocking _on_ the +// kernel, even briefly, during processing of other messages. (Relevant +// search term: `KeUserModeCallback`.) +// +// The nightmare scenario, then, is that during processing of an 𝛼-message, we +// briefly become blocked (e.g., by calling `::SendMessageW()`), and the kernel +// takes that opportunity to use 𝛾 to hand us a 𝛽-message. (Concretely, see +// bug 1842170.) +// +// There is little we can do to prevent the first half of this scenario. 𝛼) and +// 𝛾) are effectively immutable facts of Windows, and we sometimes legitimately +// need to make blocking calls to process 𝛼-messages. (We may not even be aware +// that we're making such calls, if they're undocumented implementation details +// of another API.) +// +// In an ideal world, WindowProc would always return promptly (or at least in +// bounded time), and 𝛽-messages would not _per se_ exist; long-running modal +// states would instead be implemented in async fashion. In practice, that's far +// easier said than done -- replacing existing uses of `SpinEventLoopUntil` _et +// al._ with asynchronous mechanisms is a collection of mostly-unrelated cross- +// cutting architectural tasks, each of potentially unbounded scope. For now, +// and for the foreseeable future, we're stuck with them. +// +// We therefore simply punt. More specifically: if a known 𝛽-message jumps the +// queue to come in while we're in the middle of processing a known 𝛼-message, +// we: +// * properly queue the message for processing later; +// * respond to the 𝛽-message as though we actually had processed it; and +// * just hope that it can wait until we get around to it. +// +// The word "known" requires a bit of justification. There is no canonical set +// of 𝛼-messages, nor is the set of 𝛽-messages fixed (or even demarcable). We +// can't safely assume that all messages are 𝛼-messages, as that could cause +// 𝛽-messages to be arbitrarily and surprisingly delayed whenever any nested +// event loop is active. We also can't assume all messages are 𝛽-messages, +// since one 𝛼-message jumping the queue while processing another 𝛼-message is +// part of normal and required operation for windowed Windows applications. +// +// So we simply add messages to those sets as we identify them. (Or, preferably, +// rework the 𝛽-message's handling to make it no longer 𝛽. But see above.) +// +// --- +// +// The actual value of `sDepth` is the number of active invocations of +// `WindowProc` that are processing known 𝛼-messages. +size_t nsWindow::WndProcUrgentInvocation::sDepth = 0; + +// Hook Data Members for Dropdowns. sProcessHook Tells the +// hook methods whether they should be processing the hook +// messages. +HHOOK nsWindow::sMsgFilterHook = nullptr; +HHOOK nsWindow::sCallProcHook = nullptr; +HHOOK nsWindow::sCallMouseHook = nullptr; +bool nsWindow::sProcessHook = false; +UINT nsWindow::sRollupMsgId = 0; +HWND nsWindow::sRollupMsgWnd = nullptr; +UINT nsWindow::sHookTimerId = 0; + +// Used to prevent dispatching mouse events that do not originate from user +// input. +POINT nsWindow::sLastMouseMovePoint = {0}; + +bool nsWindow::sIsRestoringSession = false; + +bool nsWindow::sTouchInjectInitialized = false; +InjectTouchInputPtr nsWindow::sInjectTouchFuncPtr; + +static SystemTimeConverter<DWORD>& TimeConverter() { + static SystemTimeConverter<DWORD> timeConverterSingleton; + return timeConverterSingleton; +} + +// Global event hook for window cloaking. Never deregistered. +// - `Nothing` if not yet set. +// - `Some(nullptr)` if no attempt should be made to set it. +static mozilla::Maybe<HWINEVENTHOOK> sWinCloakEventHook = + IsWin8OrLater() ? Nothing() : Some(HWINEVENTHOOK(nullptr)); +static mozilla::LazyLogModule sCloakingLog("DWMCloaking"); + +namespace mozilla { + +class CurrentWindowsTimeGetter { + public: + explicit CurrentWindowsTimeGetter(HWND aWnd) : mWnd(aWnd) {} + + DWORD GetCurrentTime() const { return ::GetTickCount(); } + + void GetTimeAsyncForPossibleBackwardsSkew(const TimeStamp& aNow) { + DWORD currentTime = GetCurrentTime(); + if (sBackwardsSkewStamp && currentTime == sLastPostTime) { + // There's already one inflight with this timestamp. Don't + // send a duplicate. + return; + } + sBackwardsSkewStamp = Some(aNow); + sLastPostTime = currentTime; + static_assert(sizeof(WPARAM) >= sizeof(DWORD), + "Can't fit a DWORD in a WPARAM"); + ::PostMessage(mWnd, MOZ_WM_SKEWFIX, sLastPostTime, 0); + } + + static bool GetAndClearBackwardsSkewStamp(DWORD aPostTime, + TimeStamp* aOutSkewStamp) { + if (aPostTime != sLastPostTime) { + // The SKEWFIX message is stale; we've sent a new one since then. + // Ignore this one. + return false; + } + MOZ_ASSERT(sBackwardsSkewStamp); + *aOutSkewStamp = sBackwardsSkewStamp.value(); + sBackwardsSkewStamp = Nothing(); + return true; + } + + private: + static Maybe<TimeStamp> sBackwardsSkewStamp; + static DWORD sLastPostTime; + HWND mWnd; +}; + +Maybe<TimeStamp> CurrentWindowsTimeGetter::sBackwardsSkewStamp; +DWORD CurrentWindowsTimeGetter::sLastPostTime = 0; + +} // namespace mozilla + +/************************************************************** + * + * SECTION: globals variables + * + **************************************************************/ + +static const char* sScreenManagerContractID = + "@mozilla.org/gfx/screenmanager;1"; + +extern mozilla::LazyLogModule gWindowsLog; + +static NS_DEFINE_CID(kCClipboardCID, NS_CLIPBOARD_CID); + +// General purpose user32.dll hook object +static WindowsDllInterceptor sUser32Intercept; + +// 2 pixel offset for TransparencyMode::BorderlessGlass which equals the size of +// the default window border Windows paints. Glass will be extended inward +// this distance to remove the border. +static const int32_t kGlassMarginAdjustment = 2; + +// When the client area is extended out into the default window frame area, +// this is the minimum amount of space along the edge of resizable windows +// we will always display a resize cursor in, regardless of the underlying +// content. +static const int32_t kResizableBorderMinSize = 3; + +// Getting this object from the window server can be expensive. Keep it +// around, also get it off the main thread. (See bug 1640852) +StaticRefPtr<IVirtualDesktopManager> gVirtualDesktopManager; +static bool gInitializedVirtualDesktopManager = false; + +// We should never really try to accelerate windows bigger than this. In some +// cases this might lead to no D3D9 acceleration where we could have had it +// but D3D9 does not reliably report when it supports bigger windows. 8192 +// is as safe as we can get, we know at least D3D10 hardware always supports +// this, other hardware we expect to report correctly in D3D9. +#define MAX_ACCELERATED_DIMENSION 8192 + +// On window open (as well as after), Windows has an unfortunate habit of +// sending rather a lot of WM_NCHITTEST messages. Because we have to do point +// to DOM target conversions for these, we cache responses for a given +// coordinate this many milliseconds: +#define HITTEST_CACHE_LIFETIME_MS 50 + +#if defined(ACCESSIBILITY) + +namespace mozilla { + +/** + * Windows touchscreen code works by setting a global WH_GETMESSAGE hook and + * injecting tiptsf.dll. The touchscreen process then posts registered messages + * to our main thread. The tiptsf hook picks up those registered messages and + * uses them as commands, some of which call into UIA, which then calls into + * MSAA, which then sends WM_GETOBJECT to us. + * + * We can get ahead of this by installing our own thread-local WH_GETMESSAGE + * hook. Since thread-local hooks are called ahead of global hooks, we will + * see these registered messages before tiptsf does. At this point we can then + * raise a flag that blocks a11y before invoking CallNextHookEx which will then + * invoke the global tiptsf hook. Then when we see WM_GETOBJECT, we check the + * flag by calling TIPMessageHandler::IsA11yBlocked(). + * + * For Windows 8, we also hook tiptsf!ProcessCaretEvents, which is an a11y hook + * function that also calls into UIA. + */ +class TIPMessageHandler { + public: + ~TIPMessageHandler() { + if (mHook) { + ::UnhookWindowsHookEx(mHook); + } + } + + static void Initialize() { + if (!IsWin8OrLater()) { + return; + } + + if (sInstance) { + return; + } + + sInstance = new TIPMessageHandler(); + ClearOnShutdown(&sInstance); + } + + static bool IsA11yBlocked() { + if (!sInstance) { + return false; + } + + return sInstance->mA11yBlockCount > 0; + } + + private: + TIPMessageHandler() : mHook(nullptr), mA11yBlockCount(0) { + MOZ_ASSERT(NS_IsMainThread()); + + // Registered messages used by tiptsf + mMessages[0] = ::RegisterWindowMessage(L"ImmersiveFocusNotification"); + mMessages[1] = ::RegisterWindowMessage(L"TipCloseMenus"); + mMessages[2] = ::RegisterWindowMessage(L"TabletInputPanelOpening"); + mMessages[3] = ::RegisterWindowMessage(L"IHM Pen or Touch Event noticed"); + mMessages[4] = ::RegisterWindowMessage(L"ProgrammabilityCaretVisibility"); + mMessages[5] = ::RegisterWindowMessage(L"CaretTrackingUpdateIPHidden"); + mMessages[6] = ::RegisterWindowMessage(L"CaretTrackingUpdateIPInfo"); + + mHook = ::SetWindowsHookEx(WH_GETMESSAGE, &TIPHook, nullptr, + ::GetCurrentThreadId()); + MOZ_ASSERT(mHook); + + // On touchscreen devices, tiptsf.dll will have been loaded when STA COM was + // first initialized. + if (!IsWin10OrLater() && GetModuleHandle(L"tiptsf.dll") && + !sProcessCaretEventsStub) { + sTipTsfInterceptor.Init("tiptsf.dll"); + DebugOnly<bool> ok = sProcessCaretEventsStub.Set( + sTipTsfInterceptor, "ProcessCaretEvents", &ProcessCaretEventsHook); + MOZ_ASSERT(ok); + } + + if (!sSendMessageTimeoutWStub) { + sUser32Intercept.Init("user32.dll"); + DebugOnly<bool> hooked = sSendMessageTimeoutWStub.Set( + sUser32Intercept, "SendMessageTimeoutW", &SendMessageTimeoutWHook); + MOZ_ASSERT(hooked); + } + } + + class MOZ_RAII A11yInstantiationBlocker { + public: + A11yInstantiationBlocker() { + if (!TIPMessageHandler::sInstance) { + return; + } + ++TIPMessageHandler::sInstance->mA11yBlockCount; + } + + ~A11yInstantiationBlocker() { + if (!TIPMessageHandler::sInstance) { + return; + } + MOZ_ASSERT(TIPMessageHandler::sInstance->mA11yBlockCount > 0); + --TIPMessageHandler::sInstance->mA11yBlockCount; + } + }; + + friend class A11yInstantiationBlocker; + + static LRESULT CALLBACK TIPHook(int aCode, WPARAM aWParam, LPARAM aLParam) { + if (aCode < 0 || !sInstance) { + return ::CallNextHookEx(nullptr, aCode, aWParam, aLParam); + } + + MSG* msg = reinterpret_cast<MSG*>(aLParam); + UINT& msgCode = msg->message; + + for (uint32_t i = 0; i < ArrayLength(sInstance->mMessages); ++i) { + if (msgCode == sInstance->mMessages[i]) { + A11yInstantiationBlocker block; + return ::CallNextHookEx(nullptr, aCode, aWParam, aLParam); + } + } + + return ::CallNextHookEx(nullptr, aCode, aWParam, aLParam); + } + + static void CALLBACK ProcessCaretEventsHook(HWINEVENTHOOK aWinEventHook, + DWORD aEvent, HWND aHwnd, + LONG aObjectId, LONG aChildId, + DWORD aGeneratingTid, + DWORD aEventTime) { + A11yInstantiationBlocker block; + sProcessCaretEventsStub(aWinEventHook, aEvent, aHwnd, aObjectId, aChildId, + aGeneratingTid, aEventTime); + } + + static LRESULT WINAPI SendMessageTimeoutWHook(HWND aHwnd, UINT aMsgCode, + WPARAM aWParam, LPARAM aLParam, + UINT aFlags, UINT aTimeout, + PDWORD_PTR aMsgResult) { + // We don't want to handle this unless the message is a WM_GETOBJECT that we + // want to block, and the aHwnd is a nsWindow that belongs to the current + // (i.e., main) thread. + if (!aMsgResult || aMsgCode != WM_GETOBJECT || + static_cast<LONG>(aLParam) != OBJID_CLIENT || !::NS_IsMainThread() || + !WinUtils::GetNSWindowPtr(aHwnd) || !IsA11yBlocked()) { + return sSendMessageTimeoutWStub(aHwnd, aMsgCode, aWParam, aLParam, aFlags, + aTimeout, aMsgResult); + } + + // In this case we want to fake the result that would happen if we had + // decided not to handle WM_GETOBJECT in our WndProc. We hand the message + // off to DefWindowProc to accomplish this. + *aMsgResult = static_cast<DWORD_PTR>( + ::DefWindowProcW(aHwnd, aMsgCode, aWParam, aLParam)); + + return static_cast<LRESULT>(TRUE); + } + + static WindowsDllInterceptor sTipTsfInterceptor; + static WindowsDllInterceptor::FuncHookType<WINEVENTPROC> + sProcessCaretEventsStub; + static WindowsDllInterceptor::FuncHookType<decltype(&SendMessageTimeoutW)> + sSendMessageTimeoutWStub; + static StaticAutoPtr<TIPMessageHandler> sInstance; + + HHOOK mHook; + UINT mMessages[7]; + uint32_t mA11yBlockCount; +}; + +WindowsDllInterceptor TIPMessageHandler::sTipTsfInterceptor; +WindowsDllInterceptor::FuncHookType<WINEVENTPROC> + TIPMessageHandler::sProcessCaretEventsStub; +WindowsDllInterceptor::FuncHookType<decltype(&SendMessageTimeoutW)> + TIPMessageHandler::sSendMessageTimeoutWStub; +StaticAutoPtr<TIPMessageHandler> TIPMessageHandler::sInstance; + +} // namespace mozilla + +#endif // defined(ACCESSIBILITY) + +namespace mozilla { + +// This task will get the VirtualDesktopManager from the generic thread pool +// since doing this on the main thread on startup causes performance issues. +// +// See bug 1640852. +// +// This should be fine and should not require any locking, as when the main +// thread will access it, if it races with this function it will either find +// it to be null or to have a valid value. +class InitializeVirtualDesktopManagerTask : public Task { + public: + InitializeVirtualDesktopManagerTask() : Task(false, kDefaultPriorityValue) {} + +#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY + bool GetName(nsACString& aName) override { + aName.AssignLiteral("InitializeVirtualDesktopManagerTask"); + return true; + } +#endif + + virtual bool Run() override { + if (!IsWin10OrLater()) { + return true; + } + + RefPtr<IVirtualDesktopManager> desktopManager; + HRESULT hr = ::CoCreateInstance( + CLSID_VirtualDesktopManager, NULL, CLSCTX_INPROC_SERVER, + __uuidof(IVirtualDesktopManager), getter_AddRefs(desktopManager)); + if (FAILED(hr)) { + return true; + } + + gVirtualDesktopManager = desktopManager; + return true; + } +}; + +static bool GetMouseVanishSystemPref(bool aShouldUpdate) { + static Maybe<bool> sCachedMouseVanishSystemPref; + + if (aShouldUpdate) { + sCachedMouseVanishSystemPref.reset(); + } + + if (sCachedMouseVanishSystemPref.isNothing()) { + BOOL mouseVanishSystemPref; + BOOL ok = ::SystemParametersInfo(SPI_GETMOUSEVANISH, 0, + &mouseVanishSystemPref, 0); + // If getting system pref failed, just use user pref. + sCachedMouseVanishSystemPref.emplace( + ok ? mouseVanishSystemPref + : StaticPrefs::widget_windows_hide_cursor_when_typing()); + } + + return *sCachedMouseVanishSystemPref; +} + +static bool IsMouseVanishKey(WPARAM aVirtKey) { + switch (aVirtKey) { + case VK_SHIFT: + case VK_LSHIFT: + case VK_RSHIFT: + case VK_CONTROL: + case VK_LCONTROL: + case VK_RCONTROL: + case VK_MENU: + case VK_LMENU: + case VK_RMENU: + case VK_LWIN: + case VK_RWIN: + case VK_INSERT: + case VK_DELETE: + case VK_HOME: + case VK_END: + case VK_ESCAPE: + case VK_PRINT: + case VK_UP: + case VK_DOWN: + case VK_LEFT: + case VK_RIGHT: + case VK_PRIOR: // PgUp + case VK_NEXT: // PgDn + case 0xff: // Undefined. May be sent for Fn key. + return false; + default: + // Vanish unless Ctrl or Alt is also pressed, or if a key in + // a relevant range is pressed. + // The range between VK_F1 and VK_LAUNCH_APP2 includes control, + // function, browser, volume and media keys, all of which we ignore. + return (GetKeyState(VK_CONTROL) & 0x8000) != 0x8000 && + (GetKeyState(VK_MENU) & 0x8000) != 0x8000 && + (aVirtKey < VK_F1 || aVirtKey > VK_LAUNCH_APP2); + } +} + +/** + * Hide/unhide the cursor if the correct Windows and Firefox settings are set. + */ +static void MaybeHideCursor(bool aShouldHide) { + static bool sMouseExists = [] { + // Before the first call to ShowCursor, the visibility count is 0 + // if there is a mouse installed and -1 if not. + int count = ::ShowCursor(FALSE); + ::ShowCursor(TRUE); + return count == -1; + }(); + + if (!sMouseExists) { + return; + } + + static bool sIsHidden = false; + bool shouldHide = aShouldHide && + StaticPrefs::widget_windows_hide_cursor_when_typing() && + GetMouseVanishSystemPref(false); + + if (shouldHide != sIsHidden) { + [[maybe_unused]] int count = ::ShowCursor(aShouldHide ? FALSE : TRUE); + MOZ_ASSERT(count == (aShouldHide ? -1 : 0)); + sIsHidden = shouldHide; + } +} + +// Ground-truth query: does Windows claim the window is cloaked right now? +static bool IsCloaked(HWND hwnd) { + DWORD cloakedState; + HRESULT hr = ::DwmGetWindowAttribute(hwnd, DWMWA_CLOAKED, &cloakedState, + sizeof(cloakedState)); + + if (FAILED(hr)) { + MOZ_LOG(sCloakingLog, LogLevel::Warning, + ("failed (%08lX) to query cloaking state for HWND %p", hr, hwnd)); + return false; + } + + return cloakedState != 0; +} + +} // namespace mozilla + +/************************************************************** + ************************************************************** + ** + ** BLOCK: nsIWidget impl. + ** + ** nsIWidget interface implementation, broken down into + ** sections. + ** + ************************************************************** + **************************************************************/ + +/************************************************************** + * + * SECTION: nsWindow construction and destruction + * + **************************************************************/ + +nsWindow::nsWindow(bool aIsChildWindow) + : nsBaseWidget(BorderStyle::Default), + mBrush(::CreateSolidBrush(NSRGB_2_COLOREF(::GetSysColor(COLOR_BTNFACE)))), + mFrameState(std::in_place, this), + mIsChildWindow(aIsChildWindow), + mLastPaintEndTime(TimeStamp::Now()), + mCachedHitTestTime(TimeStamp::Now()), + mSizeConstraintsScale(GetDefaultScale().scale), + mDesktopId("DesktopIdMutex") { + MOZ_ASSERT(mWindowType == WindowType::Child); + + if (!gInitializedVirtualDesktopManager) { + TaskController::Get()->AddTask( + MakeAndAddRef<InitializeVirtualDesktopManagerTask>()); + gInitializedVirtualDesktopManager = true; + } + + // Global initialization + if (!sInstanceCount) { + // Global app registration id for Win7 and up. See + // WinTaskbar.cpp for details. + // MSIX packages explicitly do not support setting the appid from within + // the app, as it is set in the package manifest instead. + if (!WinUtils::HasPackageIdentity()) { + mozilla::widget::WinTaskbar::RegisterAppUserModelID(); + } + KeyboardLayout::GetInstance()->OnLayoutChange(::GetKeyboardLayout(0)); +#if defined(ACCESSIBILITY) + mozilla::TIPMessageHandler::Initialize(); +#endif // defined(ACCESSIBILITY) + if (SUCCEEDED(::OleInitialize(nullptr))) { + sIsOleInitialized = true; + } + NS_ASSERTION(sIsOleInitialized, "***** OLE is not initialized!\n"); + MouseScrollHandler::Initialize(); + // Init theme data + nsUXThemeData::UpdateNativeThemeInfo(); + RedirectedKeyDownMessageManager::Forget(); + if (mPointerEvents.ShouldEnableInkCollector()) { + InkCollector::sInkCollector = new InkCollector(); + } + } // !sInstanceCount + + sInstanceCount++; +} + +nsWindow::~nsWindow() { + mInDtor = true; + + // If the widget was released without calling Destroy() then the native window + // still exists, and we need to destroy it. Destroy() will early-return if it + // was already called. In any case it is important to call it before + // destroying mPresentLock (cf. 1156182). + Destroy(); + + // Free app icon resources. This must happen after `OnDestroy` (see bug + // 708033). + if (mIconSmall) ::DestroyIcon(mIconSmall); + + if (mIconBig) ::DestroyIcon(mIconBig); + + sInstanceCount--; + + // Global shutdown + if (sInstanceCount == 0) { + if (InkCollector::sInkCollector) { + InkCollector::sInkCollector->Shutdown(); + InkCollector::sInkCollector = nullptr; + } + IMEHandler::Terminate(); + sCurrentCursor = {}; + if (sIsOleInitialized) { + ::OleFlushClipboard(); + ::OleUninitialize(); + sIsOleInitialized = false; + } + } + + NS_IF_RELEASE(mNativeDragTarget); +} + +/************************************************************** + * + * SECTION: nsIWidget::Create, nsIWidget::Destroy + * + * Creating and destroying windows for this widget. + * + **************************************************************/ + +// Allow Derived classes to modify the height that is passed +// when the window is created or resized. +int32_t nsWindow::GetHeight(int32_t aProposedHeight) { return aProposedHeight; } + +static bool ShouldCacheTitleBarInfo(WindowType aWindowType, + BorderStyle aBorderStyle) { + return (aWindowType == WindowType::TopLevel) && + (aBorderStyle == BorderStyle::Default || + aBorderStyle == BorderStyle::All) && + (!nsUXThemeData::sTitlebarInfoPopulatedThemed || + !nsUXThemeData::sTitlebarInfoPopulatedAero); +} + +void nsWindow::SendAnAPZEvent(InputData& aEvent) { + LRESULT popupHandlingResult; + if (DealWithPopups(mWnd, MOZ_WM_DMANIP, 0, 0, &popupHandlingResult)) { + // We need to consume the event after using it to roll up the popup(s). + return; + } + + if (mSwipeTracker && aEvent.mInputType == PANGESTURE_INPUT) { + // Give the swipe tracker a first pass at the event. If a new pan gesture + // has been started since the beginning of the swipe, the swipe tracker + // will know to ignore the event. + nsEventStatus status = + mSwipeTracker->ProcessEvent(aEvent.AsPanGestureInput()); + if (status == nsEventStatus_eConsumeNoDefault) { + return; + } + } + + APZEventResult result; + if (mAPZC) { + result = mAPZC->InputBridge()->ReceiveInputEvent(aEvent); + } + if (result.GetStatus() == nsEventStatus_eConsumeNoDefault) { + return; + } + + MOZ_ASSERT(aEvent.mInputType == PANGESTURE_INPUT || + aEvent.mInputType == PINCHGESTURE_INPUT); + + if (aEvent.mInputType == PANGESTURE_INPUT) { + PanGestureInput& panInput = aEvent.AsPanGestureInput(); + WidgetWheelEvent event = panInput.ToWidgetEvent(this); + if (!mAPZC) { + if (MayStartSwipeForNonAPZ(panInput)) { + return; + } + } else { + event = MayStartSwipeForAPZ(panInput, result); + } + + ProcessUntransformedAPZEvent(&event, result); + + return; + } + + PinchGestureInput& pinchInput = aEvent.AsPinchGestureInput(); + WidgetWheelEvent event = pinchInput.ToWidgetEvent(this); + ProcessUntransformedAPZEvent(&event, result); +} + +void nsWindow::RecreateDirectManipulationIfNeeded() { + DestroyDirectManipulation(); + + if (mWindowType != WindowType::TopLevel && mWindowType != WindowType::Popup) { + return; + } + + if (!(StaticPrefs::apz_allow_zooming() || + StaticPrefs::apz_windows_use_direct_manipulation()) || + StaticPrefs::apz_windows_force_disable_direct_manipulation()) { + return; + } + + if (!IsWin10OrLater()) { + // Chrome source said the Windows Direct Manipulation implementation had + // important bugs until Windows 10 (although IE on Windows 8.1 seems to use + // Direct Manipulation). + return; + } + + mDmOwner = MakeUnique<DirectManipulationOwner>(this); + + LayoutDeviceIntRect bounds(mBounds.X(), mBounds.Y(), mBounds.Width(), + GetHeight(mBounds.Height())); + mDmOwner->Init(bounds); +} + +void nsWindow::ResizeDirectManipulationViewport() { + if (mDmOwner) { + LayoutDeviceIntRect bounds(mBounds.X(), mBounds.Y(), mBounds.Width(), + GetHeight(mBounds.Height())); + mDmOwner->ResizeViewport(bounds); + } +} + +void nsWindow::DestroyDirectManipulation() { + if (mDmOwner) { + mDmOwner->Destroy(); + mDmOwner.reset(); + } +} + +// Create the proper widget +nsresult nsWindow::Create(nsIWidget* aParent, nsNativeWidget aNativeParent, + const LayoutDeviceIntRect& aRect, + widget::InitData* aInitData) { + // Historical note: there was once some belief and/or intent that nsWindows + // could be created on arbitrary threads, and this may still be reflected in + // some comments. + MOZ_ASSERT(NS_IsMainThread()); + + widget::InitData defaultInitData; + if (!aInitData) aInitData = &defaultInitData; + + nsIWidget* baseParent = + aInitData->mWindowType == WindowType::Dialog || + aInitData->mWindowType == WindowType::TopLevel || + aInitData->mWindowType == WindowType::Invisible + ? nullptr + : aParent; + + mIsTopWidgetWindow = (nullptr == baseParent); + mBounds = aRect; + + // Ensure that the toolkit is created. + nsToolkit::GetToolkit(); + + BaseCreate(baseParent, aInitData); + + HWND parent; + if (aParent) { // has a nsIWidget parent + parent = aParent ? (HWND)aParent->GetNativeData(NS_NATIVE_WINDOW) : nullptr; + mParent = aParent; + } else { // has a nsNative parent + parent = (HWND)aNativeParent; + mParent = + aNativeParent ? WinUtils::GetNSWindowPtr((HWND)aNativeParent) : nullptr; + } + + mIsRTL = aInitData->mRTL; + mForMenupopupFrame = aInitData->mForMenupopupFrame; + mOpeningAnimationSuppressed = aInitData->mIsAnimationSuppressed; + mAlwaysOnTop = aInitData->mAlwaysOnTop; + mResizable = aInitData->mResizable; + + DWORD style = WindowStyle(); + DWORD extendedStyle = WindowExStyle(); + + // When window is PiP window on Windows7, WS_EX_COMPOSITED is set to suppress + // flickering during resizing with hardware acceleration. + bool isPIPWindow = aInitData && aInitData->mPIPWindow; + if (isPIPWindow && !IsWin8OrLater() && + gfxConfig::IsEnabled(gfx::Feature::HW_COMPOSITING) && + WidgetTypeSupportsAcceleration()) { + extendedStyle |= WS_EX_COMPOSITED; + } + + if (mWindowType == WindowType::Popup) { + if (!aParent) { + parent = nullptr; + } + + if (!IsWin8OrLater() && HasBogusPopupsDropShadowOnMultiMonitor() && + ShouldUseOffMainThreadCompositing()) { + extendedStyle |= WS_EX_COMPOSITED; + } + } else if (mWindowType == WindowType::Invisible) { + // Make sure CreateWindowEx succeeds at creating a toplevel window + style &= ~0x40000000; // WS_CHILDWINDOW + } else { + // See if the caller wants to explictly set clip children and clip siblings + if (aInitData->mClipChildren) { + style |= WS_CLIPCHILDREN; + } else { + style &= ~WS_CLIPCHILDREN; + } + if (aInitData->mClipSiblings) { + style |= WS_CLIPSIBLINGS; + } + } + + const wchar_t* className = ChooseWindowClass(mWindowType, mForMenupopupFrame); + + // Take specific actions when creating the first top-level window + static bool sFirstTopLevelWindowCreated = false; + if (aInitData->mWindowType == WindowType::TopLevel && !aParent && + !sFirstTopLevelWindowCreated) { + sFirstTopLevelWindowCreated = true; + mWnd = ConsumePreXULSkeletonUIHandle(); + auto skeletonUIError = GetPreXULSkeletonUIErrorReason(); + if (skeletonUIError) { + nsAutoString errorString( + GetPreXULSkeletonUIErrorString(skeletonUIError.value())); + Telemetry::ScalarSet( + Telemetry::ScalarID::STARTUP_SKELETON_UI_DISABLED_REASON, + errorString); + } + if (mWnd) { + MOZ_ASSERT(style == kPreXULSkeletonUIWindowStyle, + "The skeleton UI window style should match the expected " + "style for the first window created"); + MOZ_ASSERT(extendedStyle == kPreXULSkeletonUIWindowStyleEx, + "The skeleton UI window extended style should match the " + "expected extended style for the first window created"); + MOZ_ASSERT( + ::GetWindowThreadProcessId(mWnd, nullptr) == ::GetCurrentThreadId(), + "The skeleton UI window should be created on the same thread as " + "other windows"); + mIsShowingPreXULSkeletonUI = true; + + // If we successfully consumed the pre-XUL skeleton UI, just update + // our internal state to match what is currently being displayed. + mIsVisible = true; + mIsCloaked = mozilla::IsCloaked(mWnd); + mFrameState->ConsumePreXULSkeletonState(WasPreXULSkeletonUIMaximized()); + + // These match the margins set in browser-tabsintitlebar.js with + // default prefs on Windows. Bug 1673092 tracks lining this up with + // that more correctly instead of hard-coding it. + SetNonClientMargins(LayoutDeviceIntMargin(0, 2, 2, 2)); + + // Reset the WNDPROC for this window and its whole class, as we had + // to use our own WNDPROC when creating the the skeleton UI window. + ::SetWindowLongPtrW(mWnd, GWLP_WNDPROC, + reinterpret_cast<LONG_PTR>( + WinUtils::NonClientDpiScalingDefWindowProcW)); + ::SetClassLongPtrW(mWnd, GCLP_WNDPROC, + reinterpret_cast<LONG_PTR>( + WinUtils::NonClientDpiScalingDefWindowProcW)); + } + } + + if (!mWnd) { + mWnd = + ::CreateWindowExW(extendedStyle, className, L"", style, aRect.X(), + aRect.Y(), aRect.Width(), GetHeight(aRect.Height()), + parent, nullptr, nsToolkit::mDllInstance, nullptr); + } + + if (!mWnd) { + NS_WARNING("nsWindow CreateWindowEx failed."); + return NS_ERROR_FAILURE; + } + + if (!sWinCloakEventHook) { + MOZ_LOG(sCloakingLog, LogLevel::Info, ("Registering cloaking event hook")); + + // C++03 lambda approximation until P2173R1 is available (-std=c++2b) + struct StdcallLambda { + static void CALLBACK OnCloakUncloakHook(HWINEVENTHOOK hWinEventHook, + DWORD event, HWND hwnd, + LONG idObject, LONG idChild, + DWORD idEventThread, + DWORD dwmsEventTime) { + const bool isCloaked = event == EVENT_OBJECT_CLOAKED ? true : false; + nsWindow::OnCloakEvent(hwnd, isCloaked); + } + }; + + const HWINEVENTHOOK hook = ::SetWinEventHook( + EVENT_OBJECT_CLOAKED, EVENT_OBJECT_UNCLOAKED, HMODULE(nullptr), + &StdcallLambda::OnCloakUncloakHook, ::GetCurrentProcessId(), + ::GetCurrentThreadId(), WINEVENT_OUTOFCONTEXT); + sWinCloakEventHook = Some(hook); + + if (!hook) { + const DWORD err = ::GetLastError(); + MOZ_LOG(sCloakingLog, LogLevel::Error, + ("Failed to register cloaking event hook! GLE = %lu (0x%lX)", err, + err)); + } + } + + if (aInitData->mIsPrivate) { + if (NimbusFeatures::GetBool("majorRelease2022"_ns, + "feltPrivacyWindowSeparation"_ns, true) && + // Although permanent Private Browsing mode is indeed Private Browsing, + // we choose to make it look like regular Firefox in terms of the icon + // it uses (which also means we shouldn't use the Private Browsing + // AUMID). + !StaticPrefs::browser_privatebrowsing_autostart()) { + RefPtr<IPropertyStore> pPropStore; + if (!FAILED(SHGetPropertyStoreForWindow(mWnd, IID_IPropertyStore, + getter_AddRefs(pPropStore)))) { + PROPVARIANT pv; + nsAutoString aumid; + // make sure we're using the private browsing AUMID so that taskbar + // grouping works properly + Unused << NS_WARN_IF( + !mozilla::widget::WinTaskbar::GenerateAppUserModelID(aumid, true)); + if (!FAILED(InitPropVariantFromString(aumid.get(), &pv))) { + if (!FAILED(pPropStore->SetValue(PKEY_AppUserModel_ID, pv))) { + pPropStore->Commit(); + } + + PropVariantClear(&pv); + } + } + HICON icon = ::LoadIconW(::GetModuleHandleW(nullptr), + MAKEINTRESOURCEW(IDI_PBMODE)); + SetBigIcon(icon); + SetSmallIcon(icon); + } + } + + mDeviceNotifyHandle = InputDeviceUtils::RegisterNotification(mWnd); + + // If mDefaultScale is set before mWnd has been set, it will have the scale of + // the primary monitor, rather than the monitor that the window is actually + // on. For non-popup windows this gets corrected by the WM_DPICHANGED message + // which resets mDefaultScale, but for popup windows we don't reset + // mDefaultScale on that message. In order to ensure that popup windows + // spawned on a non-primary monitor end up with the correct scale, we reset + // mDefaultScale here so that it gets recomputed using the correct monitor now + // that we have a mWnd. + mDefaultScale = -1.0; + + if (mIsRTL) { + DWORD dwAttribute = TRUE; + DwmSetWindowAttribute(mWnd, DWMWA_NONCLIENT_RTL_LAYOUT, &dwAttribute, + sizeof dwAttribute); + } + + UpdateDarkModeToolbar(); + + if (mOpeningAnimationSuppressed) { + SuppressAnimation(true); + } + + if (mAlwaysOnTop) { + ::SetWindowPos(mWnd, HWND_TOPMOST, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE); + } + + if (mWindowType != WindowType::Invisible && + MouseScrollHandler::Device::IsFakeScrollableWindowNeeded()) { + // Ugly Thinkpad Driver Hack (Bugs 507222 and 594977) + // + // We create two zero-sized windows as descendants of the top-level window, + // like so: + // + // Top-level window (MozillaWindowClass) + // FAKETRACKPOINTSCROLLCONTAINER (MozillaWindowClass) + // FAKETRACKPOINTSCROLLABLE (MozillaWindowClass) + // + // We need to have the middle window, otherwise the Trackpoint driver + // will fail to deliver scroll messages. WM_MOUSEWHEEL messages are + // sent to the FAKETRACKPOINTSCROLLABLE, which then propagate up the + // window hierarchy until they are handled by nsWindow::WindowProc. + // WM_HSCROLL messages are also sent to the FAKETRACKPOINTSCROLLABLE, + // but these do not propagate automatically, so we have the window + // procedure pretend that they were dispatched to the top-level window + // instead. + // + // The FAKETRACKPOINTSCROLLABLE needs to have the specific window styles it + // is given below so that it catches the Trackpoint driver's heuristics. + HWND scrollContainerWnd = ::CreateWindowW( + className, L"FAKETRACKPOINTSCROLLCONTAINER", WS_CHILD | WS_VISIBLE, 0, + 0, 0, 0, mWnd, nullptr, nsToolkit::mDllInstance, nullptr); + HWND scrollableWnd = ::CreateWindowW( + className, L"FAKETRACKPOINTSCROLLABLE", + WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_TABSTOP | 0x30, 0, 0, 0, 0, + scrollContainerWnd, nullptr, nsToolkit::mDllInstance, nullptr); + + // Give the FAKETRACKPOINTSCROLLABLE window a specific ID so that + // WindowProcInternal can distinguish it from the top-level window + // easily. + ::SetWindowLongPtrW(scrollableWnd, GWLP_ID, eFakeTrackPointScrollableID); + + // Make FAKETRACKPOINTSCROLLABLE use nsWindow::WindowProc, and store the + // old window procedure in its "user data". + WNDPROC oldWndProc = (WNDPROC)::SetWindowLongPtrW( + scrollableWnd, GWLP_WNDPROC, (LONG_PTR)nsWindow::WindowProc); + ::SetWindowLongPtrW(scrollableWnd, GWLP_USERDATA, (LONG_PTR)oldWndProc); + } + + // We will start receiving native events after associating with our native + // window. We will also become the output of WinUtils::GetNSWindowPtr for that + // window. + if (!AssociateWithNativeWindow()) { + return NS_ERROR_FAILURE; + } + + // Starting with Windows XP, a process always runs within a terminal services + // session. In order to play nicely with RDP, fast user switching, and the + // lock screen, we should be handling WM_WTSSESSION_CHANGE. We must register + // our HWND in order to receive this message. + DebugOnly<BOOL> wtsRegistered = + ::WTSRegisterSessionNotification(mWnd, NOTIFY_FOR_THIS_SESSION); + NS_ASSERTION(wtsRegistered, "WTSRegisterSessionNotification failed!\n"); + + mDefaultIMC.Init(this); + IMEHandler::InitInputContext(this, mInputContext); + + // Query for command button metric data for rendering the titlebar. We + // only do this once on the first window that has an actual titlebar + if (ShouldCacheTitleBarInfo(mWindowType, mBorderStyle)) { + nsUXThemeData::UpdateTitlebarInfo(mWnd); + } + + static bool a11yPrimed = false; + if (!a11yPrimed && mWindowType == WindowType::TopLevel) { + a11yPrimed = true; + if (Preferences::GetInt("accessibility.force_disabled", 0) == -1) { + ::PostMessage(mWnd, MOZ_WM_STARTA11Y, 0, 0); + } + } + + RecreateDirectManipulationIfNeeded(); + + return NS_OK; +} + +void nsWindow::LocalesChanged() { + bool isRTL = intl::LocaleService::GetInstance()->IsAppLocaleRTL(); + if (mIsRTL != isRTL) { + DWORD dwAttribute = isRTL; + DwmSetWindowAttribute(mWnd, DWMWA_NONCLIENT_RTL_LAYOUT, &dwAttribute, + sizeof dwAttribute); + mIsRTL = isRTL; + } +} + +// Close this nsWindow +void nsWindow::Destroy() { + // WM_DESTROY has already fired, avoid calling it twice + if (mOnDestroyCalled) return; + + // Don't destroy windows that have file pickers open, we'll tear these down + // later once the picker is closed. + mDestroyCalled = true; + if (mPickerDisplayCount) return; + + // During the destruction of all of our children, make sure we don't get + // deleted. + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + + DestroyDirectManipulation(); + + /** + * On windows the LayerManagerOGL destructor wants the widget to be around for + * cleanup. It also would like to have the HWND intact, so we nullptr it here. + */ + DestroyLayerManager(); + + InputDeviceUtils::UnregisterNotification(mDeviceNotifyHandle); + mDeviceNotifyHandle = nullptr; + + // The DestroyWindow function destroys the specified window. The function + // sends WM_DESTROY and WM_NCDESTROY messages to the window to deactivate it + // and remove the keyboard focus from it. The function also destroys the + // window's menu, flushes the thread message queue, destroys timers, removes + // clipboard ownership, and breaks the clipboard viewer chain (if the window + // is at the top of the viewer chain). + // + // If the specified window is a parent or owner window, DestroyWindow + // automatically destroys the associated child or owned windows when it + // destroys the parent or owner window. The function first destroys child or + // owned windows, and then it destroys the parent or owner window. + VERIFY(::DestroyWindow(mWnd)); + + // Our windows can be subclassed which may prevent us receiving WM_DESTROY. If + // OnDestroy() didn't get called, call it now. + if (false == mOnDestroyCalled) { + MSGResult msgResult; + mWindowHook.Notify(mWnd, WM_DESTROY, 0, 0, msgResult); + OnDestroy(); + } +} + +/************************************************************** + * + * SECTION: Window class utilities + * + * Utilities for calculating the proper window class name for + * Create window. + * + **************************************************************/ + +/* static */ +const wchar_t* nsWindow::RegisterWindowClass(const wchar_t* aClassName, + UINT aExtraStyle, LPWSTR aIconID) { + WNDCLASSW wc; + if (::GetClassInfoW(nsToolkit::mDllInstance, aClassName, &wc)) { + // already registered + return aClassName; + } + + wc.style = CS_DBLCLKS | aExtraStyle; + wc.lpfnWndProc = WinUtils::NonClientDpiScalingDefWindowProcW; + wc.cbClsExtra = 0; + wc.cbWndExtra = 0; + wc.hInstance = nsToolkit::mDllInstance; + wc.hIcon = + aIconID ? ::LoadIconW(::GetModuleHandleW(nullptr), aIconID) : nullptr; + wc.hCursor = nullptr; + wc.hbrBackground = nullptr; + wc.lpszMenuName = nullptr; + wc.lpszClassName = aClassName; + + if (!::RegisterClassW(&wc)) { + // For older versions of Win32 (i.e., not XP), the registration may + // fail with aExtraStyle, so we have to re-register without it. + wc.style = CS_DBLCLKS; + ::RegisterClassW(&wc); + } + return aClassName; +} + +static LPWSTR const gStockApplicationIcon = MAKEINTRESOURCEW(32512); + +/* static */ +const wchar_t* nsWindow::ChooseWindowClass(WindowType aWindowType, + bool aForMenupopupFrame) { + MOZ_ASSERT_IF(aForMenupopupFrame, aWindowType == WindowType::Popup); + switch (aWindowType) { + case WindowType::Invisible: + return RegisterWindowClass(kClassNameHidden, 0, gStockApplicationIcon); + case WindowType::Dialog: + return RegisterWindowClass(kClassNameDialog, 0, 0); + case WindowType::Popup: + if (aForMenupopupFrame) { + return RegisterWindowClass(kClassNameDropShadow, CS_DROPSHADOW, + gStockApplicationIcon); + } + [[fallthrough]]; + default: + return RegisterWindowClass(GetMainWindowClass(), 0, + gStockApplicationIcon); + } +} + +/************************************************************** + * + * SECTION: Window styles utilities + * + * Return the proper windows styles and extended styles. + * + **************************************************************/ + +// Return nsWindow styles +DWORD nsWindow::WindowStyle() { + DWORD style; + + switch (mWindowType) { + case WindowType::Child: + style = WS_OVERLAPPED; + break; + + case WindowType::Dialog: + style = WS_OVERLAPPED | WS_BORDER | WS_DLGFRAME | WS_SYSMENU | DS_3DLOOK | + DS_MODALFRAME | WS_CLIPCHILDREN; + if (mBorderStyle != BorderStyle::Default) + style |= WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX; + break; + + case WindowType::Popup: + style = WS_POPUP; + if (!HasGlass()) { + style |= WS_OVERLAPPED; + } + break; + + default: + NS_ERROR("unknown border style"); + [[fallthrough]]; + + case WindowType::TopLevel: + case WindowType::Invisible: + style = WS_OVERLAPPED | WS_BORDER | WS_DLGFRAME | WS_SYSMENU | + WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_CLIPCHILDREN; + break; + } + + if (mBorderStyle != BorderStyle::Default && + mBorderStyle != BorderStyle::All) { + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::Border)) + style &= ~WS_BORDER; + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::Title)) { + style &= ~WS_DLGFRAME; + } + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::Close)) + style &= ~0; + // XXX The close box can only be removed by changing the window class, + // as far as I know --- roc+moz@cs.cmu.edu + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & (BorderStyle::Menu | BorderStyle::Close))) + style &= ~WS_SYSMENU; + // Looks like getting rid of the system menu also does away with the + // close box. So, we only get rid of the system menu if you want neither it + // nor the close box. How does the Windows "Dialog" window class get just + // closebox and no sysmenu? Who knows. + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::ResizeH)) + style &= ~WS_THICKFRAME; + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::Minimize)) + style &= ~WS_MINIMIZEBOX; + + if (mBorderStyle == BorderStyle::None || + !(mBorderStyle & BorderStyle::Maximize)) + style &= ~WS_MAXIMIZEBOX; + + if (IsPopupWithTitleBar()) { + style |= WS_CAPTION; + if (mBorderStyle & BorderStyle::Close) { + style |= WS_SYSMENU; + } + } + } + + if (mIsChildWindow) { + style |= WS_CLIPCHILDREN; + if (!(style & WS_POPUP)) { + style |= WS_CHILD; // WS_POPUP and WS_CHILD are mutually exclusive. + } + } + + VERIFY_WINDOW_STYLE(style); + return style; +} + +// Return nsWindow extended styles +DWORD nsWindow::WindowExStyle() { + switch (mWindowType) { + case WindowType::Child: + return 0; + + case WindowType::Dialog: + return WS_EX_WINDOWEDGE | WS_EX_DLGMODALFRAME; + + case WindowType::Popup: { + DWORD extendedStyle = WS_EX_TOOLWINDOW; + if (mPopupLevel == PopupLevel::Top) extendedStyle |= WS_EX_TOPMOST; + return extendedStyle; + } + default: + NS_ERROR("unknown border style"); + [[fallthrough]]; + + case WindowType::TopLevel: + case WindowType::Invisible: + return WS_EX_WINDOWEDGE; + } +} + +/************************************************************** + * + * SECTION: Native window association utilities + * + * Used in Create and Destroy. A nsWindow can associate with its + * underlying native window mWnd. Once a native window is + * associated with a nsWindow, its native events will be handled + * by the static member function nsWindow::WindowProc. Moreover, + * the association will be registered in the WinUtils association + * list, that is, calling WinUtils::GetNSWindowPtr on the native + * window will return the associated nsWindow. This is used in + * nsWindow::WindowProc to correctly dispatch native events to + * the handler methods defined in nsWindow, even though it is a + * static member function. + * + * After dissociation, the native events of the native window will + * no longer be handled by nsWindow::WindowProc, and will thus not + * be dispatched to the nsWindow native event handler methods. + * Moreover, the association will no longer be registered in the + * WinUtils association list, so calling WinUtils::GetNSWindowPtr + * on the native window will return nullptr. + * + **************************************************************/ + +bool nsWindow::AssociateWithNativeWindow() { + if (!mWnd || !IsWindow(mWnd)) { + NS_ERROR("Invalid window handle"); + return false; + } + + // Connect the this pointer to the native window handle. + // This should be done before SetWindowLongPtrW, because nsWindow::WindowProc + // uses WinUtils::GetNSWindowPtr internally. + WinUtils::SetNSWindowPtr(mWnd, this); + + ::SetLastError(ERROR_SUCCESS); + const auto prevWndProc = reinterpret_cast<WNDPROC>(::SetWindowLongPtrW( + mWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(nsWindow::WindowProc))); + if (!prevWndProc && GetLastError() != ERROR_SUCCESS) { + NS_ERROR("Failure in SetWindowLongPtrW"); + WinUtils::SetNSWindowPtr(mWnd, nullptr); + return false; + } + + mPrevWndProc.emplace(prevWndProc); + return true; +} + +void nsWindow::DissociateFromNativeWindow() { + if (!mWnd || !IsWindow(mWnd) || mPrevWndProc.isNothing()) { + return; + } + + DebugOnly<WNDPROC> wndProcBeforeDissociate = + reinterpret_cast<WNDPROC>(::SetWindowLongPtrW( + mWnd, GWLP_WNDPROC, reinterpret_cast<LONG_PTR>(*mPrevWndProc))); + NS_ASSERTION(wndProcBeforeDissociate == nsWindow::WindowProc, + "Unstacked an unexpected native window procedure"); + + WinUtils::SetNSWindowPtr(mWnd, nullptr); + mPrevWndProc.reset(); +} + +/************************************************************** + * + * SECTION: nsIWidget::SetParent, nsIWidget::GetParent + * + * Set or clear the parent widgets using window properties, and + * handles calculating native parent handles. + * + **************************************************************/ + +// Get and set parent widgets +void nsWindow::SetParent(nsIWidget* aNewParent) { + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + nsIWidget* parent = GetParent(); + if (parent) { + parent->RemoveChild(this); + } + + mParent = aNewParent; + + if (aNewParent) { + ReparentNativeWidget(aNewParent); + aNewParent->AddChild(this); + return; + } + if (mWnd) { + // If we have no parent, SetParent should return the desktop. + VERIFY(::SetParent(mWnd, nullptr)); + RecreateDirectManipulationIfNeeded(); + } +} + +void nsWindow::ReparentNativeWidget(nsIWidget* aNewParent) { + MOZ_ASSERT(aNewParent, "null widget"); + + mParent = aNewParent; + if (mWindowType == WindowType::Popup) { + return; + } + HWND newParent = (HWND)aNewParent->GetNativeData(NS_NATIVE_WINDOW); + NS_ASSERTION(newParent, "Parent widget has a null native window handle"); + if (newParent && mWnd) { + ::SetParent(mWnd, newParent); + RecreateDirectManipulationIfNeeded(); + } +} + +nsIWidget* nsWindow::GetParent(void) { + if (mIsTopWidgetWindow) { + return nullptr; + } + if (mInDtor || mOnDestroyCalled) { + return nullptr; + } + return mParent; +} + +static int32_t RoundDown(double aDouble) { + return aDouble > 0 ? static_cast<int32_t>(floor(aDouble)) + : static_cast<int32_t>(ceil(aDouble)); +} + +float nsWindow::GetDPI() { + float dpi = 96.0f; + nsCOMPtr<nsIScreen> screen = GetWidgetScreen(); + if (screen) { + screen->GetDpi(&dpi); + } + return dpi; +} + +double nsWindow::GetDefaultScaleInternal() { + if (mDefaultScale <= 0.0) { + mDefaultScale = WinUtils::LogToPhysFactor(mWnd); + } + return mDefaultScale; +} + +int32_t nsWindow::LogToPhys(double aValue) { + return WinUtils::LogToPhys( + ::MonitorFromWindow(mWnd, MONITOR_DEFAULTTOPRIMARY), aValue); +} + +nsWindow* nsWindow::GetParentWindow(bool aIncludeOwner) { + return static_cast<nsWindow*>(GetParentWindowBase(aIncludeOwner)); +} + +nsWindow* nsWindow::GetParentWindowBase(bool aIncludeOwner) { + if (mIsTopWidgetWindow) { + // Must use a flag instead of mWindowType to tell if the window is the + // owned by the topmost widget, because a child window can be embedded + // inside a HWND which is not associated with a nsIWidget. + return nullptr; + } + + // If this widget has already been destroyed, pretend we have no parent. + // This corresponds to code in Destroy which removes the destroyed + // widget from its parent's child list. + if (mInDtor || mOnDestroyCalled) return nullptr; + + // aIncludeOwner set to true implies walking the parent chain to retrieve the + // root owner. aIncludeOwner set to false implies the search will stop at the + // true parent (default). + nsWindow* widget = nullptr; + if (mWnd) { + HWND parent = nullptr; + if (aIncludeOwner) + parent = ::GetParent(mWnd); + else + parent = ::GetAncestor(mWnd, GA_PARENT); + + if (parent) { + widget = WinUtils::GetNSWindowPtr(parent); + if (widget) { + // If the widget is in the process of being destroyed then + // do NOT return it + if (widget->mInDtor) { + widget = nullptr; + } + } + } + } + + return widget; +} + +/************************************************************** + * + * SECTION: nsIWidget::Show + * + * Hide or show this component. + * + **************************************************************/ + +void nsWindow::Show(bool bState) { + if (bState && mIsShowingPreXULSkeletonUI) { + // The first time we decide to actually show the window is when we decide + // that we've taken over the window from the skeleton UI, and we should + // no longer treat resizes / moves specially. + mIsShowingPreXULSkeletonUI = false; +#if defined(ACCESSIBILITY) + // If our HWND has focus and the a11y engine hasn't started yet, fire a + // focus win event. Windows already did this when the skeleton UI appeared, + // but a11y wouldn't have been able to start at that point even if a client + // responded. Firing this now gives clients the chance to respond with + // WM_GETOBJECT, which will trigger the a11y engine. We don't want to do + // this if the a11y engine has already started because it has probably + // already fired focus on a descendant. + if (::GetFocus() == mWnd && !GetAccService()) { + ::NotifyWinEvent(EVENT_OBJECT_FOCUS, mWnd, OBJID_CLIENT, CHILDID_SELF); + } +#endif // defined(ACCESSIBILITY) + } + + if (mForMenupopupFrame) { + MOZ_ASSERT(ChooseWindowClass(mWindowType, mForMenupopupFrame) == + kClassNameDropShadow); + const bool shouldUseDropShadow = [&] { + if (mTransparencyMode == TransparencyMode::Transparent) { + return false; + } + if (HasBogusPopupsDropShadowOnMultiMonitor() && + WinUtils::GetMonitorCount() > 1 && + !gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + // See bug 603793. When we try to draw D3D9/10 windows with a drop + // shadow without the DWM on a secondary monitor, windows fails to + // composite our windows correctly. We therefor switch off the drop + // shadow for pop-up windows when the DWM is disabled and two monitors + // are connected. + return false; + } + return true; + }(); + + static bool sShadowEnabled = true; + if (sShadowEnabled != shouldUseDropShadow) { + ::SetClassLongA(mWnd, GCL_STYLE, shouldUseDropShadow ? CS_DROPSHADOW : 0); + sShadowEnabled = shouldUseDropShadow; + } + + // WS_EX_COMPOSITED conflicts with the WS_EX_LAYERED style and causes + // some popup menus to become invisible. + LONG_PTR exStyle = ::GetWindowLongPtrW(mWnd, GWL_EXSTYLE); + if (exStyle & WS_EX_LAYERED) { + ::SetWindowLongPtrW(mWnd, GWL_EXSTYLE, exStyle & ~WS_EX_COMPOSITED); + } + } + + bool syncInvalidate = false; + + bool wasVisible = mIsVisible; + // Set the status now so that anyone asking during ShowWindow or + // SetWindowPos would get the correct answer. + mIsVisible = bState; + + // We may have cached an out of date visible state. This can happen + // when session restore sets the full screen mode. + if (mIsVisible) + mOldStyle |= WS_VISIBLE; + else + mOldStyle &= ~WS_VISIBLE; + + if (mWnd) { + if (bState) { + if (!wasVisible && mWindowType == WindowType::TopLevel) { + // speed up the initial paint after show for + // top level windows: + syncInvalidate = true; + + // Set the cursor before showing the window to avoid the default wait + // cursor. + SetCursor(Cursor{eCursor_standard}); + + switch (mFrameState->GetSizeMode()) { + case nsSizeMode_Fullscreen: + ::ShowWindow(mWnd, SW_SHOW); + break; + case nsSizeMode_Maximized: + ::ShowWindow(mWnd, SW_SHOWMAXIMIZED); + break; + case nsSizeMode_Minimized: + ::ShowWindow(mWnd, SW_SHOWMINIMIZED); + break; + default: + if (CanTakeFocus() && !mAlwaysOnTop) { + ::ShowWindow(mWnd, SW_SHOWNORMAL); + } else { + ::ShowWindow(mWnd, SW_SHOWNOACTIVATE); + // Don't flicker the window if we're restoring session + if (!sIsRestoringSession) { + Unused << GetAttention(2); + } + } + break; + } + } else { + DWORD flags = SWP_NOSIZE | SWP_NOMOVE | SWP_SHOWWINDOW; + if (wasVisible) flags |= SWP_NOZORDER; + if (mAlwaysOnTop) flags |= SWP_NOACTIVATE; + + if (mWindowType == WindowType::Popup) { + // ensure popups are the topmost of the TOPMOST + // layer. Remember not to set the SWP_NOZORDER + // flag as that might allow the taskbar to overlap + // the popup. + flags |= SWP_NOACTIVATE; + HWND owner = ::GetWindow(mWnd, GW_OWNER); + if (owner) { + // PopupLevel::Top popups should be above all else. All other + // types should be placed in front of their owner, without + // changing the owner's z-level relative to other windows. + if (mPopupLevel != PopupLevel::Top) { + ::SetWindowPos(mWnd, owner, 0, 0, 0, 0, flags); + ::SetWindowPos(owner, mWnd, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE); + } else { + ::SetWindowPos(mWnd, HWND_TOP, 0, 0, 0, 0, flags); + } + } else { + ::SetWindowPos(mWnd, HWND_TOPMOST, 0, 0, 0, 0, flags); + } + } else { + if (mWindowType == WindowType::Dialog && !CanTakeFocus()) + flags |= SWP_NOACTIVATE; + + ::SetWindowPos(mWnd, HWND_TOP, 0, 0, 0, 0, flags); + } + } + } else { + // Clear contents to avoid ghosting of old content if we display + // this window again. + if (wasVisible && mTransparencyMode == TransparencyMode::Transparent) { + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->ClearTransparentWindow(); + } + } + if (mWindowType != WindowType::Dialog) { + ::ShowWindow(mWnd, SW_HIDE); + } else { + ::SetWindowPos(mWnd, 0, 0, 0, 0, 0, + SWP_HIDEWINDOW | SWP_NOSIZE | SWP_NOMOVE | SWP_NOZORDER | + SWP_NOACTIVATE); + } + } + } + + if (!wasVisible && bState) { + Invalidate(); + if (syncInvalidate && !mInDtor && !mOnDestroyCalled) { + ::UpdateWindow(mWnd); + } + } + + if (mOpeningAnimationSuppressed) { + SuppressAnimation(false); + } +} + +/************************************************************** + * + * SECTION: nsIWidget::IsVisible + * + * Returns the visibility state. + * + **************************************************************/ + +// Return true if the component is visible, false otherwise. +// +// This does not take cloaking into account. +bool nsWindow::IsVisible() const { return mIsVisible; } + +/************************************************************** + * + * SECTION: Window clipping utilities + * + * Used in Size and Move operations for setting the proper + * window clipping regions for window transparency. + * + **************************************************************/ + +// XP and Vista visual styles sometimes require window clipping regions to be +// applied for proper transparency. These routines are called on size and move +// operations. +// XXX this is apparently still needed in Windows 7 and later +void nsWindow::ClearThemeRegion() { + if (!HasGlass() && + (mWindowType == WindowType::Popup && !IsPopupWithTitleBar() && + (mPopupType == PopupType::Tooltip || mPopupType == PopupType::Panel))) { + SetWindowRgn(mWnd, nullptr, false); + } +} + +/************************************************************** + * + * SECTION: Touch and APZ-related functions + * + **************************************************************/ + +void nsWindow::RegisterTouchWindow() { + mTouchWindow = true; + ::RegisterTouchWindow(mWnd, TWF_WANTPALM); + ::EnumChildWindows(mWnd, nsWindow::RegisterTouchForDescendants, 0); +} + +BOOL CALLBACK nsWindow::RegisterTouchForDescendants(HWND aWnd, LPARAM aMsg) { + nsWindow* win = WinUtils::GetNSWindowPtr(aWnd); + if (win) { + ::RegisterTouchWindow(aWnd, TWF_WANTPALM); + } + return TRUE; +} + +void nsWindow::LockAspectRatio(bool aShouldLock) { + if (aShouldLock) { + mAspectRatio = (float)mBounds.Width() / (float)mBounds.Height(); + } else { + mAspectRatio = 0.0; + } +} + +/************************************************************** + * + * SECTION: nsIWidget::SetInputRegion + * + * Sets whether the window should ignore mouse events. + * + **************************************************************/ +void nsWindow::SetInputRegion(const InputRegion& aInputRegion) { + mInputRegion = aInputRegion; +} + +/************************************************************** + * + * SECTION: nsIWidget::Move, nsIWidget::Resize, nsIWidget::Size + * + * Repositioning and sizing a window. + * + **************************************************************/ + +void nsWindow::SetSizeConstraints(const SizeConstraints& aConstraints) { + SizeConstraints c = aConstraints; + + if (mWindowType != WindowType::Popup && mResizable) { + c.mMinSize.width = + std::max(int32_t(::GetSystemMetrics(SM_CXMINTRACK)), c.mMinSize.width); + c.mMinSize.height = + std::max(int32_t(::GetSystemMetrics(SM_CYMINTRACK)), c.mMinSize.height); + } + + if (mMaxTextureSize > 0) { + // We can't make ThebesLayers bigger than this anyway.. no point it letting + // a window grow bigger as we won't be able to draw content there in + // general. + c.mMaxSize.width = std::min(c.mMaxSize.width, mMaxTextureSize); + c.mMaxSize.height = std::min(c.mMaxSize.height, mMaxTextureSize); + } + + mSizeConstraintsScale = GetDefaultScale().scale; + + nsBaseWidget::SetSizeConstraints(c); +} + +const SizeConstraints nsWindow::GetSizeConstraints() { + double scale = GetDefaultScale().scale; + if (mSizeConstraintsScale == scale || mSizeConstraintsScale == 0.0) { + return mSizeConstraints; + } + scale /= mSizeConstraintsScale; + SizeConstraints c = mSizeConstraints; + if (c.mMinSize.width != NS_MAXSIZE) { + c.mMinSize.width = NSToIntRound(c.mMinSize.width * scale); + } + if (c.mMinSize.height != NS_MAXSIZE) { + c.mMinSize.height = NSToIntRound(c.mMinSize.height * scale); + } + if (c.mMaxSize.width != NS_MAXSIZE) { + c.mMaxSize.width = NSToIntRound(c.mMaxSize.width * scale); + } + if (c.mMaxSize.height != NS_MAXSIZE) { + c.mMaxSize.height = NSToIntRound(c.mMaxSize.height * scale); + } + return c; +} + +// Move this component +void nsWindow::Move(double aX, double aY) { + if (mWindowType == WindowType::TopLevel || + mWindowType == WindowType::Dialog) { + SetSizeMode(nsSizeMode_Normal); + } + + // for top-level windows only, convert coordinates from desktop pixels + // (the "parent" coordinate space) to the window's device pixel space + double scale = + BoundsUseDesktopPixels() ? GetDesktopToDeviceScale().scale : 1.0; + int32_t x = NSToIntRound(aX * scale); + int32_t y = NSToIntRound(aY * scale); + + // Check to see if window needs to be moved first + // to avoid a costly call to SetWindowPos. This check + // can not be moved to the calling code in nsView, because + // some platforms do not position child windows correctly + + // Only perform this check for non-popup windows, since the positioning can + // in fact change even when the x/y do not. We always need to perform the + // check. See bug #97805 for details. + if (mWindowType != WindowType::Popup && mBounds.IsEqualXY(x, y)) { + // Nothing to do, since it is already positioned correctly. + return; + } + + mBounds.MoveTo(x, y); + + if (mWnd) { +#ifdef DEBUG + // complain if a window is moved offscreen (legal, but potentially + // worrisome) + if (mIsTopWidgetWindow) { // only a problem for top-level windows + // Make sure this window is actually on the screen before we move it + // XXX: Needs multiple monitor support + HDC dc = ::GetDC(mWnd); + if (dc) { + if (::GetDeviceCaps(dc, TECHNOLOGY) == DT_RASDISPLAY) { + RECT workArea; + ::SystemParametersInfo(SPI_GETWORKAREA, 0, &workArea, 0); + // no annoying assertions. just mention the issue. + if (x < 0 || x >= workArea.right || y < 0 || y >= workArea.bottom) { + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("window moved to offscreen position\n")); + } + } + ::ReleaseDC(mWnd, dc); + } + } +#endif + + // Normally, when the skeleton UI is disabled, we resize+move the window + // before showing it in order to ensure that it restores to the correct + // position when the user un-maximizes it. However, when we are using the + // skeleton UI, this results in the skeleton UI window being moved around + // undesirably before being locked back into the maximized position. To + // avoid this, we simply set the placement to restore to via + // SetWindowPlacement. It's a little bit more of a dance, though, since we + // need to convert the workspace coords that SetWindowPlacement uses to the + // screen space coordinates we normally use with SetWindowPos. + if (mIsShowingPreXULSkeletonUI && WasPreXULSkeletonUIMaximized()) { + WINDOWPLACEMENT pl = {sizeof(WINDOWPLACEMENT)}; + VERIFY(::GetWindowPlacement(mWnd, &pl)); + + HMONITOR monitor = ::MonitorFromWindow(mWnd, MONITOR_DEFAULTTONULL); + if (NS_WARN_IF(!monitor)) { + return; + } + MONITORINFO mi = {sizeof(MONITORINFO)}; + VERIFY(::GetMonitorInfo(monitor, &mi)); + + int32_t deltaX = + x + mi.rcWork.left - mi.rcMonitor.left - pl.rcNormalPosition.left; + int32_t deltaY = + y + mi.rcWork.top - mi.rcMonitor.top - pl.rcNormalPosition.top; + pl.rcNormalPosition.left += deltaX; + pl.rcNormalPosition.right += deltaX; + pl.rcNormalPosition.top += deltaY; + pl.rcNormalPosition.bottom += deltaY; + VERIFY(::SetWindowPlacement(mWnd, &pl)); + } else { + ClearThemeRegion(); + + UINT flags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOSIZE; + double oldScale = mDefaultScale; + mResizeState = IN_SIZEMOVE; + VERIFY(::SetWindowPos(mWnd, nullptr, x, y, 0, 0, flags)); + mResizeState = NOT_RESIZING; + if (WinUtils::LogToPhysFactor(mWnd) != oldScale) { + ChangedDPI(); + } + } + + ResizeDirectManipulationViewport(); + } +} + +// Resize this component +void nsWindow::Resize(double aWidth, double aHeight, bool aRepaint) { + // for top-level windows only, convert coordinates from desktop pixels + // (the "parent" coordinate space) to the window's device pixel space + double scale = + BoundsUseDesktopPixels() ? GetDesktopToDeviceScale().scale : 1.0; + int32_t width = NSToIntRound(aWidth * scale); + int32_t height = NSToIntRound(aHeight * scale); + + NS_ASSERTION((width >= 0), "Negative width passed to nsWindow::Resize"); + NS_ASSERTION((height >= 0), "Negative height passed to nsWindow::Resize"); + if (width < 0 || height < 0) { + gfxCriticalNoteOnce << "Negative passed to Resize(" << width << ", " + << height << ") repaint: " << aRepaint; + } + + ConstrainSize(&width, &height); + + // Avoid unnecessary resizing calls + if (mBounds.IsEqualSize(width, height)) { + if (aRepaint) { + Invalidate(); + } + return; + } + + // Set cached value for lightweight and printing + bool wasLocking = mAspectRatio != 0.0; + mBounds.SizeTo(width, height); + if (wasLocking) { + LockAspectRatio(true); // This causes us to refresh the mAspectRatio value + } + + if (mWnd) { + // Refer to the comment above a similar check in nsWindow::Move + if (mIsShowingPreXULSkeletonUI && WasPreXULSkeletonUIMaximized()) { + WINDOWPLACEMENT pl = {sizeof(WINDOWPLACEMENT)}; + VERIFY(::GetWindowPlacement(mWnd, &pl)); + pl.rcNormalPosition.right = pl.rcNormalPosition.left + width; + pl.rcNormalPosition.bottom = pl.rcNormalPosition.top + GetHeight(height); + mResizeState = RESIZING; + VERIFY(::SetWindowPlacement(mWnd, &pl)); + mResizeState = NOT_RESIZING; + } else { + UINT flags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOMOVE; + + if (!aRepaint) { + flags |= SWP_NOREDRAW; + } + + ClearThemeRegion(); + double oldScale = mDefaultScale; + mResizeState = RESIZING; + VERIFY( + ::SetWindowPos(mWnd, nullptr, 0, 0, width, GetHeight(height), flags)); + + mResizeState = NOT_RESIZING; + if (WinUtils::LogToPhysFactor(mWnd) != oldScale) { + ChangedDPI(); + } + } + + ResizeDirectManipulationViewport(); + } + + if (aRepaint) Invalidate(); +} + +// Resize this component +void nsWindow::Resize(double aX, double aY, double aWidth, double aHeight, + bool aRepaint) { + // for top-level windows only, convert coordinates from desktop pixels + // (the "parent" coordinate space) to the window's device pixel space + double scale = + BoundsUseDesktopPixels() ? GetDesktopToDeviceScale().scale : 1.0; + int32_t x = NSToIntRound(aX * scale); + int32_t y = NSToIntRound(aY * scale); + int32_t width = NSToIntRound(aWidth * scale); + int32_t height = NSToIntRound(aHeight * scale); + + NS_ASSERTION((width >= 0), "Negative width passed to nsWindow::Resize"); + NS_ASSERTION((height >= 0), "Negative height passed to nsWindow::Resize"); + if (width < 0 || height < 0) { + gfxCriticalNoteOnce << "Negative passed to Resize(" << x << " ," << y + << ", " << width << ", " << height + << ") repaint: " << aRepaint; + } + + ConstrainSize(&width, &height); + + // Avoid unnecessary resizing calls + if (mBounds.IsEqualRect(x, y, width, height)) { + if (aRepaint) { + Invalidate(); + } + return; + } + + // Set cached value for lightweight and printing + mBounds.SetRect(x, y, width, height); + + if (mWnd) { + // Refer to the comment above a similar check in nsWindow::Move + if (mIsShowingPreXULSkeletonUI && WasPreXULSkeletonUIMaximized()) { + WINDOWPLACEMENT pl = {sizeof(WINDOWPLACEMENT)}; + VERIFY(::GetWindowPlacement(mWnd, &pl)); + + HMONITOR monitor = ::MonitorFromWindow(mWnd, MONITOR_DEFAULTTONULL); + if (NS_WARN_IF(!monitor)) { + return; + } + MONITORINFO mi = {sizeof(MONITORINFO)}; + VERIFY(::GetMonitorInfo(monitor, &mi)); + + int32_t deltaX = + x + mi.rcWork.left - mi.rcMonitor.left - pl.rcNormalPosition.left; + int32_t deltaY = + y + mi.rcWork.top - mi.rcMonitor.top - pl.rcNormalPosition.top; + pl.rcNormalPosition.left += deltaX; + pl.rcNormalPosition.right = pl.rcNormalPosition.left + width; + pl.rcNormalPosition.top += deltaY; + pl.rcNormalPosition.bottom = pl.rcNormalPosition.top + GetHeight(height); + VERIFY(::SetWindowPlacement(mWnd, &pl)); + } else { + UINT flags = SWP_NOZORDER | SWP_NOACTIVATE; + if (!aRepaint) { + flags |= SWP_NOREDRAW; + } + + ClearThemeRegion(); + + double oldScale = mDefaultScale; + mResizeState = RESIZING; + VERIFY( + ::SetWindowPos(mWnd, nullptr, x, y, width, GetHeight(height), flags)); + mResizeState = NOT_RESIZING; + if (WinUtils::LogToPhysFactor(mWnd) != oldScale) { + ChangedDPI(); + } + + if (mTransitionWnd) { + // If we have a fullscreen transition window, we need to make + // it topmost again, otherwise the taskbar may be raised by + // the system unexpectedly when we leave fullscreen state. + ::SetWindowPos(mTransitionWnd, HWND_TOPMOST, 0, 0, 0, 0, + SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE); + } + } + + ResizeDirectManipulationViewport(); + } + + if (aRepaint) Invalidate(); +} + +mozilla::Maybe<bool> nsWindow::IsResizingNativeWidget() { + if (mResizeState == RESIZING) { + return Some(true); + } + return Some(false); +} + +/************************************************************** + * + * SECTION: Window Z-order and state. + * + * nsIWidget::PlaceBehind, nsIWidget::SetSizeMode, + * nsIWidget::ConstrainPosition + * + * Z-order, positioning, restore, minimize, and maximize. + * + **************************************************************/ + +// Position the window behind the given window +void nsWindow::PlaceBehind(nsTopLevelWidgetZPlacement aPlacement, + nsIWidget* aWidget, bool aActivate) { + HWND behind = HWND_TOP; + if (aPlacement == eZPlacementBottom) + behind = HWND_BOTTOM; + else if (aPlacement == eZPlacementBelow && aWidget) + behind = (HWND)aWidget->GetNativeData(NS_NATIVE_WINDOW); + UINT flags = SWP_NOMOVE | SWP_NOREPOSITION | SWP_NOSIZE; + if (!aActivate) flags |= SWP_NOACTIVATE; + + if (!CanTakeFocus() && behind == HWND_TOP) { + // Can't place the window to top so place it behind the foreground window + // (as long as it is not topmost) + HWND wndAfter = ::GetForegroundWindow(); + if (!wndAfter) + behind = HWND_BOTTOM; + else if (!(GetWindowLongPtrW(wndAfter, GWL_EXSTYLE) & WS_EX_TOPMOST)) + behind = wndAfter; + flags |= SWP_NOACTIVATE; + } + + ::SetWindowPos(mWnd, behind, 0, 0, 0, 0, flags); +} + +static UINT GetCurrentShowCmd(HWND aWnd) { + WINDOWPLACEMENT pl; + pl.length = sizeof(pl); + ::GetWindowPlacement(aWnd, &pl); + return pl.showCmd; +} + +// Maximize, minimize or restore the window. +void nsWindow::SetSizeMode(nsSizeMode aMode) { + // If we are still displaying a maximized pre-XUL skeleton UI, ignore the + // noise of sizemode changes. Once we have "shown" the window for the first + // time (called nsWindow::Show(true), even though the window is already + // technically displayed), we will again accept sizemode changes. + if (mIsShowingPreXULSkeletonUI && WasPreXULSkeletonUIMaximized()) { + return; + } + + mFrameState->EnsureSizeMode(aMode); +} + +nsSizeMode nsWindow::SizeMode() { return mFrameState->GetSizeMode(); } + +void DoGetWorkspaceID(HWND aWnd, nsAString* aWorkspaceID) { + RefPtr<IVirtualDesktopManager> desktopManager = gVirtualDesktopManager; + if (!desktopManager || !aWnd) { + return; + } + + GUID desktop; + HRESULT hr = desktopManager->GetWindowDesktopId(aWnd, &desktop); + if (FAILED(hr)) { + return; + } + + RPC_WSTR workspaceIDStr = nullptr; + if (UuidToStringW(&desktop, &workspaceIDStr) == RPC_S_OK) { + aWorkspaceID->Assign((wchar_t*)workspaceIDStr); + RpcStringFreeW(&workspaceIDStr); + } +} + +void nsWindow::GetWorkspaceID(nsAString& workspaceID) { + // If we have a value cached, use that, but also make sure it is + // scheduled to be updated. If we don't yet have a value, get + // one synchronously. + auto desktop = mDesktopId.Lock(); + if (desktop->mID.IsEmpty()) { + DoGetWorkspaceID(mWnd, &desktop->mID); + desktop->mUpdateIsQueued = false; + } else { + AsyncUpdateWorkspaceID(*desktop); + } + + workspaceID = desktop->mID; +} + +void nsWindow::AsyncUpdateWorkspaceID(Desktop& aDesktop) { + struct UpdateWorkspaceIdTask : public Task { + explicit UpdateWorkspaceIdTask(nsWindow* aSelf) + : Task(false /* mainThread */, EventQueuePriority::Normal), + mSelf(aSelf) {} + + bool Run() override { + auto desktop = mSelf->mDesktopId.Lock(); + if (desktop->mUpdateIsQueued) { + DoGetWorkspaceID(mSelf->mWnd, &desktop->mID); + desktop->mUpdateIsQueued = false; + } + return true; + } + +#ifdef MOZ_COLLECTING_RUNNABLE_TELEMETRY + bool GetName(nsACString& aName) override { + aName.AssignLiteral("UpdateWorkspaceIdTask"); + return true; + } +#endif + + RefPtr<nsWindow> mSelf; + }; + + if (aDesktop.mUpdateIsQueued) { + return; + } + + aDesktop.mUpdateIsQueued = true; + TaskController::Get()->AddTask(MakeAndAddRef<UpdateWorkspaceIdTask>(this)); +} + +void nsWindow::MoveToWorkspace(const nsAString& workspaceID) { + RefPtr<IVirtualDesktopManager> desktopManager = gVirtualDesktopManager; + if (!desktopManager) { + return; + } + + GUID desktop; + const nsString flat = PromiseFlatString(workspaceID); + RPC_WSTR workspaceIDStr = reinterpret_cast<RPC_WSTR>((wchar_t*)flat.get()); + if (UuidFromStringW(workspaceIDStr, &desktop) == RPC_S_OK) { + if (SUCCEEDED(desktopManager->MoveWindowToDesktop(mWnd, desktop))) { + auto desktop = mDesktopId.Lock(); + desktop->mID = workspaceID; + } + } +} + +void nsWindow::SuppressAnimation(bool aSuppress) { + DWORD dwAttribute = aSuppress ? TRUE : FALSE; + DwmSetWindowAttribute(mWnd, DWMWA_TRANSITIONS_FORCEDISABLED, &dwAttribute, + sizeof dwAttribute); +} + +// Constrain a potential move to fit onscreen +// Position (aX, aY) is specified in Windows screen (logical) pixels, +// except when using per-monitor DPI, in which case it's device pixels. +void nsWindow::ConstrainPosition(DesktopIntPoint& aPoint) { + if (!mIsTopWidgetWindow) // only a problem for top-level windows + return; + + double dpiScale = GetDesktopToDeviceScale().scale; + + // We need to use the window size in the kind of pixels used for window- + // manipulation APIs. + int32_t logWidth = + std::max<int32_t>(NSToIntRound(mBounds.Width() / dpiScale), 1); + int32_t logHeight = + std::max<int32_t>(NSToIntRound(mBounds.Height() / dpiScale), 1); + + /* get our playing field. use the current screen, or failing that + for any reason, use device caps for the default screen. */ + RECT screenRect; + + nsCOMPtr<nsIScreenManager> screenmgr = + do_GetService(sScreenManagerContractID); + if (!screenmgr) { + return; + } + nsCOMPtr<nsIScreen> screen; + int32_t left, top, width, height; + + screenmgr->ScreenForRect(aPoint.x, aPoint.y, logWidth, logHeight, + getter_AddRefs(screen)); + if (mFrameState->GetSizeMode() != nsSizeMode_Fullscreen) { + // For normalized windows, use the desktop work area. + nsresult rv = screen->GetAvailRectDisplayPix(&left, &top, &width, &height); + if (NS_FAILED(rv)) { + return; + } + } else { + // For full screen windows, use the desktop. + nsresult rv = screen->GetRectDisplayPix(&left, &top, &width, &height); + if (NS_FAILED(rv)) { + return; + } + } + screenRect.left = left; + screenRect.right = left + width; + screenRect.top = top; + screenRect.bottom = top + height; + + if (aPoint.x < screenRect.left) + aPoint.x = screenRect.left; + else if (aPoint.x >= screenRect.right - logWidth) + aPoint.x = screenRect.right - logWidth; + + if (aPoint.y < screenRect.top) + aPoint.y = screenRect.top; + else if (aPoint.y >= screenRect.bottom - logHeight) + aPoint.y = screenRect.bottom - logHeight; +} + +/************************************************************** + * + * SECTION: nsIWidget::Enable, nsIWidget::IsEnabled + * + * Enabling and disabling the widget. + * + **************************************************************/ + +// Enable/disable this component +void nsWindow::Enable(bool bState) { + if (mWnd) { + ::EnableWindow(mWnd, bState); + } +} + +// Return the current enable state +bool nsWindow::IsEnabled() const { + return !mWnd || (::IsWindowEnabled(mWnd) && + ::IsWindowEnabled(::GetAncestor(mWnd, GA_ROOT))); +} + +/************************************************************** + * + * SECTION: nsIWidget::SetFocus + * + * Give the focus to this widget. + * + **************************************************************/ + +void nsWindow::SetFocus(Raise aRaise, mozilla::dom::CallerType aCallerType) { + if (mWnd) { +#ifdef WINSTATE_DEBUG_OUTPUT + if (mWnd == WinUtils::GetTopLevelHWND(mWnd)) { + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("*** SetFocus: [ top] raise=%d\n", aRaise == Raise::Yes)); + } else { + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("*** SetFocus: [child] raise=%d\n", aRaise == Raise::Yes)); + } +#endif + // Uniconify, if necessary + HWND toplevelWnd = WinUtils::GetTopLevelHWND(mWnd); + if (aRaise == Raise::Yes && ::IsIconic(toplevelWnd)) { + ::ShowWindow(toplevelWnd, SW_RESTORE); + } + ::SetFocus(mWnd); + } +} + +/************************************************************** + * + * SECTION: Bounds + * + * GetBounds, GetClientBounds, GetScreenBounds, + * GetRestoredBounds, GetClientOffset + * SetDrawsInTitlebar, SetNonClientMargins + * + * Bound calculations. + * + **************************************************************/ + +// Return the window's full dimensions in screen coordinates. +// If the window has a parent, converts the origin to an offset +// of the parent's screen origin. +LayoutDeviceIntRect nsWindow::GetBounds() { + if (!mWnd) { + return mBounds; + } + + RECT r; + VERIFY(::GetWindowRect(mWnd, &r)); + + LayoutDeviceIntRect rect; + + // assign size + rect.SizeTo(r.right - r.left, r.bottom - r.top); + + // popup window bounds' are in screen coordinates, not relative to parent + // window + if (mWindowType == WindowType::Popup) { + rect.MoveTo(r.left, r.top); + return rect; + } + + // chrome on parent: + // ___ 5,5 (chrome start) + // | ____ 10,10 (client start) + // | | ____ 20,20 (child start) + // | | | + // 20,20 - 5,5 = 15,15 (??) + // minus GetClientOffset: + // 15,15 - 5,5 = 10,10 + // + // no chrome on parent: + // ______ 10,10 (win start) + // | ____ 20,20 (child start) + // | | + // 20,20 - 10,10 = 10,10 + // + // walking the chain: + // ___ 5,5 (chrome start) + // | ___ 10,10 (client start) + // | | ___ 20,20 (child start) + // | | | __ 30,30 (child start) + // | | | | + // 30,30 - 20,20 = 10,10 (offset from second child to first) + // 20,20 - 5,5 = 15,15 + 10,10 = 25,25 (??) + // minus GetClientOffset: + // 25,25 - 5,5 = 20,20 (offset from second child to parent client) + + // convert coordinates if parent exists + HWND parent = ::GetParent(mWnd); + if (parent) { + RECT pr; + VERIFY(::GetWindowRect(parent, &pr)); + r.left -= pr.left; + r.top -= pr.top; + // adjust for chrome + nsWindow* pWidget = static_cast<nsWindow*>(GetParent()); + if (pWidget && pWidget->IsTopLevelWidget()) { + LayoutDeviceIntPoint clientOffset = pWidget->GetClientOffset(); + r.left -= clientOffset.x; + r.top -= clientOffset.y; + } + } + rect.MoveTo(r.left, r.top); + if (mCompositorSession && + !wr::WindowSizeSanityCheck(rect.width, rect.height)) { + gfxCriticalNoteOnce << "Invalid size" << rect << " size mode " + << mFrameState->GetSizeMode(); + } + + return rect; +} + +// Get this component dimension +LayoutDeviceIntRect nsWindow::GetClientBounds() { + if (!mWnd) { + return LayoutDeviceIntRect(0, 0, 0, 0); + } + + RECT r; + if (!::GetClientRect(mWnd, &r)) { + MOZ_ASSERT_UNREACHABLE("unexpected to be called"); + gfxCriticalNoteOnce << "GetClientRect failed " << ::GetLastError(); + return mBounds; + } + + LayoutDeviceIntRect bounds = GetBounds(); + LayoutDeviceIntRect rect; + rect.MoveTo(bounds.TopLeft() + GetClientOffset()); + rect.SizeTo(r.right - r.left, r.bottom - r.top); + return rect; +} + +// Like GetBounds, but don't offset by the parent +LayoutDeviceIntRect nsWindow::GetScreenBounds() { + if (!mWnd) { + return mBounds; + } + + RECT r; + VERIFY(::GetWindowRect(mWnd, &r)); + + return LayoutDeviceIntRect(r.left, r.top, r.right - r.left, r.bottom - r.top); +} + +nsresult nsWindow::GetRestoredBounds(LayoutDeviceIntRect& aRect) { + if (SizeMode() == nsSizeMode_Normal) { + aRect = GetScreenBounds(); + return NS_OK; + } + if (!mWnd) { + return NS_ERROR_FAILURE; + } + + WINDOWPLACEMENT pl = {sizeof(WINDOWPLACEMENT)}; + VERIFY(::GetWindowPlacement(mWnd, &pl)); + const RECT& r = pl.rcNormalPosition; + + HMONITOR monitor = ::MonitorFromWindow(mWnd, MONITOR_DEFAULTTONULL); + if (!monitor) { + return NS_ERROR_FAILURE; + } + MONITORINFO mi = {sizeof(MONITORINFO)}; + VERIFY(::GetMonitorInfo(monitor, &mi)); + + aRect.SetRect(r.left, r.top, r.right - r.left, r.bottom - r.top); + aRect.MoveBy(mi.rcWork.left - mi.rcMonitor.left, + mi.rcWork.top - mi.rcMonitor.top); + return NS_OK; +} + +// Return the x,y offset of the client area from the origin of the window. If +// the window is borderless returns (0,0). +LayoutDeviceIntPoint nsWindow::GetClientOffset() { + if (!mWnd) { + return LayoutDeviceIntPoint(0, 0); + } + + RECT r1; + GetWindowRect(mWnd, &r1); + LayoutDeviceIntPoint pt = WidgetToScreenOffset(); + return LayoutDeviceIntPoint(pt.x - LayoutDeviceIntCoord(r1.left), + pt.y - LayoutDeviceIntCoord(r1.top)); +} + +void nsWindow::SetDrawsInTitlebar(bool aState) { + nsWindow* window = GetTopLevelWindow(true); + if (window && window != this) { + return window->SetDrawsInTitlebar(aState); + } + + // top, right, bottom, left + SetNonClientMargins(aState ? LayoutDeviceIntMargin(0, -1, -1, -1) + : LayoutDeviceIntMargin(-1, -1, -1, -1)); +} + +void nsWindow::ResetLayout() { + // This will trigger a frame changed event, triggering + // nc calc size and a sizemode gecko event. + SetWindowPos(mWnd, 0, 0, 0, 0, 0, + SWP_FRAMECHANGED | SWP_NOACTIVATE | SWP_NOMOVE | + SWP_NOOWNERZORDER | SWP_NOSIZE | SWP_NOZORDER); + + // If hidden, just send the frame changed event for now. + if (!mIsVisible) { + return; + } + + // Send a gecko size event to trigger reflow. + RECT clientRc = {0}; + GetClientRect(mWnd, &clientRc); + OnResize(WinUtils::ToIntRect(clientRc).Size()); + + // Invalidate and update + Invalidate(); +} + +// Internally track the caption status via a window property. Required +// due to our internal handling of WM_NCACTIVATE when custom client +// margins are set. +static const wchar_t kManageWindowInfoProperty[] = L"ManageWindowInfoProperty"; +typedef BOOL(WINAPI* GetWindowInfoPtr)(HWND hwnd, PWINDOWINFO pwi); +static WindowsDllInterceptor::FuncHookType<GetWindowInfoPtr> + sGetWindowInfoPtrStub; + +BOOL WINAPI GetWindowInfoHook(HWND hWnd, PWINDOWINFO pwi) { + if (!sGetWindowInfoPtrStub) { + NS_ASSERTION(FALSE, "Something is horribly wrong in GetWindowInfoHook!"); + return FALSE; + } + int windowStatus = + reinterpret_cast<LONG_PTR>(GetPropW(hWnd, kManageWindowInfoProperty)); + // No property set, return the default data. + if (!windowStatus) return sGetWindowInfoPtrStub(hWnd, pwi); + // Call GetWindowInfo and update dwWindowStatus with our + // internally tracked value. + BOOL result = sGetWindowInfoPtrStub(hWnd, pwi); + if (result && pwi) + pwi->dwWindowStatus = (windowStatus == 1 ? 0 : WS_ACTIVECAPTION); + return result; +} + +void nsWindow::UpdateGetWindowInfoCaptionStatus(bool aActiveCaption) { + if (!mWnd) return; + + sUser32Intercept.Init("user32.dll"); + sGetWindowInfoPtrStub.Set(sUser32Intercept, "GetWindowInfo", + &GetWindowInfoHook); + if (!sGetWindowInfoPtrStub) { + return; + } + + // Update our internally tracked caption status + SetPropW(mWnd, kManageWindowInfoProperty, + reinterpret_cast<HANDLE>(static_cast<INT_PTR>(aActiveCaption) + 1)); +} + +#define DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1 19 +#define DWMWA_USE_IMMERSIVE_DARK_MODE 20 + +void nsWindow::UpdateDarkModeToolbar() { + if (!IsWin10OrLater()) { + return; + } + LookAndFeel::EnsureColorSchemesInitialized(); + BOOL dark = LookAndFeel::ColorSchemeForChrome() == ColorScheme::Dark; + DwmSetWindowAttribute(mWnd, DWMWA_USE_IMMERSIVE_DARK_MODE_BEFORE_20H1, &dark, + sizeof dark); + DwmSetWindowAttribute(mWnd, DWMWA_USE_IMMERSIVE_DARK_MODE, &dark, + sizeof dark); +} + +LayoutDeviceIntMargin nsWindow::NormalWindowNonClientOffset() const { + bool glass = gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled(); + + LayoutDeviceIntMargin nonClientOffset; + + // We're dealing with a "normal" window (not maximized, minimized, or + // fullscreen), so process `mNonClientMargins` and set `mNonClientOffset` + // accordingly. + // + // Setting `mNonClientOffset` to 0 has the effect of leaving the default + // frame intact. Setting it to a value greater than 0 reduces the frame + // size by that amount. + + if (mNonClientMargins.top > 0 && glass) { + nonClientOffset.top = std::min(mCaptionHeight, mNonClientMargins.top); + } else if (mNonClientMargins.top == 0) { + nonClientOffset.top = mCaptionHeight; + } else { + nonClientOffset.top = 0; + } + + if (mNonClientMargins.bottom > 0 && glass) { + nonClientOffset.bottom = + std::min(mVertResizeMargin, mNonClientMargins.bottom); + } else if (mNonClientMargins.bottom == 0) { + nonClientOffset.bottom = mVertResizeMargin; + } else { + nonClientOffset.bottom = 0; + } + + if (mNonClientMargins.left > 0 && glass) { + nonClientOffset.left = std::min(mHorResizeMargin, mNonClientMargins.left); + } else if (mNonClientMargins.left == 0) { + nonClientOffset.left = mHorResizeMargin; + } else { + nonClientOffset.left = 0; + } + + if (mNonClientMargins.right > 0 && glass) { + nonClientOffset.right = std::min(mHorResizeMargin, mNonClientMargins.right); + } else if (mNonClientMargins.right == 0) { + nonClientOffset.right = mHorResizeMargin; + } else { + nonClientOffset.right = 0; + } + return nonClientOffset; +} + +/** + * Called when the window layout changes: full screen mode transitions, + * theme changes, and composition changes. Calculates the new non-client + * margins and fires off a frame changed event, which triggers an nc calc + * size windows event, kicking the changes in. + * + * The offsets calculated here are based on the value of `mNonClientMargins` + * which is specified in the "chromemargins" attribute of the window. For + * each margin, the value specified has the following meaning: + * -1 - leave the default frame in place + * 0 - remove the frame + * >0 - frame size equals min(0, (default frame size - margin value)) + * + * This function calculates and populates `mNonClientOffset`. + * In our processing of `WM_NCCALCSIZE`, the frame size will be calculated + * as (default frame size - offset). For example, if the left frame should + * be 1 pixel narrower than the default frame size, `mNonClientOffset.left` + * will equal 1. + * + * For maximized, fullscreen, and minimized windows, the values stored in + * `mNonClientMargins` are ignored, and special processing takes place. + * + * For non-glass windows, we only allow frames to be their default size + * or removed entirely. + */ +bool nsWindow::UpdateNonClientMargins(bool aReflowWindow) { + if (!mCustomNonClient) { + return false; + } + + const nsSizeMode sizeMode = mFrameState->GetSizeMode(); + + bool hasCaption = + bool(mBorderStyle & (BorderStyle::All | BorderStyle::Title | + BorderStyle::Menu | BorderStyle::Default)); + + float dpi = GetDPI(); + + // mCaptionHeight is the default size of the NC area at + // the top of the window. If the window has a caption, + // the size is calculated as the sum of: + // SM_CYFRAME - The thickness of the sizing border + // around a resizable window + // SM_CXPADDEDBORDER - The amount of border padding + // for captioned windows + // SM_CYCAPTION - The height of the caption area + // + // If the window does not have a caption, mCaptionHeight will be equal to + // `WinUtils::GetSystemMetricsForDpi(SM_CYFRAME, dpi)` + mCaptionHeight = + WinUtils::GetSystemMetricsForDpi(SM_CYFRAME, dpi) + + (hasCaption ? WinUtils::GetSystemMetricsForDpi(SM_CYCAPTION, dpi) + + WinUtils::GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) + : 0); + if (!mUseResizeMarginOverrides) { + // mHorResizeMargin is the size of the default NC areas on the + // left and right sides of our window. It is calculated as + // the sum of: + // SM_CXFRAME - The thickness of the sizing border + // SM_CXPADDEDBORDER - The amount of border padding + // for captioned windows + // + // If the window does not have a caption, mHorResizeMargin will be equal to + // `WinUtils::GetSystemMetricsForDpi(SM_CXFRAME, dpi)` + mHorResizeMargin = + WinUtils::GetSystemMetricsForDpi(SM_CXFRAME, dpi) + + (hasCaption ? WinUtils::GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) + : 0); + + // mVertResizeMargin is the size of the default NC area at the + // bottom of the window. It is calculated as the sum of: + // SM_CYFRAME - The thickness of the sizing border + // SM_CXPADDEDBORDER - The amount of border padding + // for captioned windows. + // + // If the window does not have a caption, mVertResizeMargin will be equal to + // `WinUtils::GetSystemMetricsForDpi(SM_CYFRAME, dpi)` + mVertResizeMargin = + WinUtils::GetSystemMetricsForDpi(SM_CYFRAME, dpi) + + (hasCaption ? WinUtils::GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) + : 0); + } + + if (sizeMode == nsSizeMode_Minimized) { + // Use default frame size for minimized windows + mNonClientOffset.top = 0; + mNonClientOffset.left = 0; + mNonClientOffset.right = 0; + mNonClientOffset.bottom = 0; + } else if (sizeMode == nsSizeMode_Fullscreen) { + // Remove the default frame from the top of our fullscreen window. This + // makes the whole caption part of our client area, allowing us to draw + // in the whole caption area. Additionally remove the default frame from + // the left, right, and bottom. + mNonClientOffset.top = mCaptionHeight; + mNonClientOffset.bottom = mVertResizeMargin; + mNonClientOffset.left = mHorResizeMargin; + mNonClientOffset.right = mHorResizeMargin; + } else if (sizeMode == nsSizeMode_Maximized) { + // On Windows 10+, we make the entire frame part of the client area. We + // leave the default frame sizes for left, right and bottom since Windows + // will automagically position the edges "offscreen" for maximized windows. + // + // On versions prior to Windows 10, we add padding to the widget to + // circumvent a bug in DwmDefWindowProc (see + // nsNativeThemeWin::GetWidgetPadding). We "undo" that padding in + // WM_NCCALCSIZE by adding the caption (as well as the sizing frame) to the + // client area. + // + // The padding is not needed on Win10+ because we handle window buttons + // non-natively in the theme. It also does not work on Win10+ -- it exposes + // a new issue where widget edges would sometimes appear to bleed into other + // displays (bug 1614218). + int verticalResize = 0; + if (IsWin10OrLater()) { + verticalResize = + WinUtils::GetSystemMetricsForDpi(SM_CYFRAME, dpi) + + (hasCaption ? WinUtils::GetSystemMetricsForDpi(SM_CXPADDEDBORDER, dpi) + : 0); + } + + mNonClientOffset.top = mCaptionHeight - verticalResize; + mNonClientOffset.bottom = 0; + mNonClientOffset.left = 0; + mNonClientOffset.right = 0; + + mozilla::Maybe<UINT> maybeEdge = GetHiddenTaskbarEdge(); + if (maybeEdge) { + auto edge = maybeEdge.value(); + if (ABE_LEFT == edge) { + mNonClientOffset.left -= kHiddenTaskbarSize; + } else if (ABE_RIGHT == edge) { + mNonClientOffset.right -= kHiddenTaskbarSize; + } else if (ABE_BOTTOM == edge || ABE_TOP == edge) { + mNonClientOffset.bottom -= kHiddenTaskbarSize; + } + + // On Windows 10+, when we are drawing the non-client region, we need + // to clear the portion of the NC region that is exposed by the + // hidden taskbar. As above, we clear the bottom of the NC region + // when the taskbar is at the top of the screen. + if (IsWin10OrLater()) { + UINT clearEdge = (edge == ABE_TOP) ? ABE_BOTTOM : edge; + mClearNCEdge = Some(clearEdge); + } + } + } else { + mNonClientOffset = NormalWindowNonClientOffset(); + } + + if (aReflowWindow) { + // Force a reflow of content based on the new client + // dimensions. + ResetLayout(); + } + + return true; +} + +nsresult nsWindow::SetNonClientMargins(const LayoutDeviceIntMargin& margins) { + if (!mIsTopWidgetWindow || mBorderStyle == BorderStyle::None) + return NS_ERROR_INVALID_ARG; + + if (mHideChrome) { + mFutureMarginsOnceChromeShows = margins; + mFutureMarginsToUse = true; + return NS_OK; + } + mFutureMarginsToUse = false; + + // Request for a reset + if (margins.top == -1 && margins.left == -1 && margins.right == -1 && + margins.bottom == -1) { + mCustomNonClient = false; + mNonClientMargins = margins; + // Force a reflow of content based on the new client + // dimensions. + ResetLayout(); + + int windowStatus = + reinterpret_cast<LONG_PTR>(GetPropW(mWnd, kManageWindowInfoProperty)); + if (windowStatus) { + ::SendMessageW(mWnd, WM_NCACTIVATE, 1 != windowStatus, 0); + } + + return NS_OK; + } + + if (margins.top < -1 || margins.bottom < -1 || margins.left < -1 || + margins.right < -1) + return NS_ERROR_INVALID_ARG; + + mNonClientMargins = margins; + mCustomNonClient = true; + if (!UpdateNonClientMargins()) { + NS_WARNING("UpdateNonClientMargins failed!"); + return NS_OK; + } + + return NS_OK; +} + +void nsWindow::SetResizeMargin(mozilla::LayoutDeviceIntCoord aResizeMargin) { + mUseResizeMarginOverrides = true; + mHorResizeMargin = aResizeMargin; + mVertResizeMargin = aResizeMargin; + UpdateNonClientMargins(); +} + +void nsWindow::InvalidateNonClientRegion() { + // +-+-----------------------+-+ + // | | app non-client chrome | | + // | +-----------------------+ | + // | | app client chrome | | } + // | +-----------------------+ | } + // | | app content | | } area we don't want to invalidate + // | +-----------------------+ | } + // | | app client chrome | | } + // | +-----------------------+ | + // +---------------------------+ < + // ^ ^ windows non-client chrome + // client area = app * + RECT rect; + GetWindowRect(mWnd, &rect); + MapWindowPoints(nullptr, mWnd, (LPPOINT)&rect, 2); + HRGN winRgn = CreateRectRgnIndirect(&rect); + + // Subtract app client chrome and app content leaving + // windows non-client chrome and app non-client chrome + // in winRgn. + GetWindowRect(mWnd, &rect); + rect.top += mCaptionHeight; + rect.right -= mHorResizeMargin; + rect.bottom -= mVertResizeMargin; + rect.left += mHorResizeMargin; + MapWindowPoints(nullptr, mWnd, (LPPOINT)&rect, 2); + HRGN clientRgn = CreateRectRgnIndirect(&rect); + CombineRgn(winRgn, winRgn, clientRgn, RGN_DIFF); + DeleteObject(clientRgn); + + // triggers ncpaint and paint events for the two areas + RedrawWindow(mWnd, nullptr, winRgn, RDW_FRAME | RDW_INVALIDATE); + DeleteObject(winRgn); +} + +HRGN nsWindow::ExcludeNonClientFromPaintRegion(HRGN aRegion) { + RECT rect; + HRGN rgn = nullptr; + if (aRegion == (HRGN)1) { // undocumented value indicating a full refresh + GetWindowRect(mWnd, &rect); + rgn = CreateRectRgnIndirect(&rect); + } else { + rgn = aRegion; + } + GetClientRect(mWnd, &rect); + MapWindowPoints(mWnd, nullptr, (LPPOINT)&rect, 2); + HRGN nonClientRgn = CreateRectRgnIndirect(&rect); + CombineRgn(rgn, rgn, nonClientRgn, RGN_DIFF); + DeleteObject(nonClientRgn); + return rgn; +} + +/************************************************************** + * + * SECTION: nsIWidget::SetBackgroundColor + * + * Sets the window background paint color. + * + **************************************************************/ + +void nsWindow::SetBackgroundColor(const nscolor& aColor) { + if (mBrush) ::DeleteObject(mBrush); + + mBrush = ::CreateSolidBrush(NSRGB_2_COLOREF(aColor)); + if (mWnd != nullptr) { + ::SetClassLongPtrW(mWnd, GCLP_HBRBACKGROUND, (LONG_PTR)mBrush); + } +} + +/************************************************************** + * + * SECTION: nsIWidget::SetCursor + * + * SetCursor and related utilities for manging cursor state. + * + **************************************************************/ + +// Set this component cursor +static HCURSOR CursorFor(nsCursor aCursor) { + switch (aCursor) { + case eCursor_select: + return ::LoadCursor(nullptr, IDC_IBEAM); + case eCursor_wait: + return ::LoadCursor(nullptr, IDC_WAIT); + case eCursor_hyperlink: + return ::LoadCursor(nullptr, IDC_HAND); + case eCursor_standard: + case eCursor_context_menu: // XXX See bug 258960. + return ::LoadCursor(nullptr, IDC_ARROW); + + case eCursor_n_resize: + case eCursor_s_resize: + return ::LoadCursor(nullptr, IDC_SIZENS); + + case eCursor_w_resize: + case eCursor_e_resize: + return ::LoadCursor(nullptr, IDC_SIZEWE); + + case eCursor_nw_resize: + case eCursor_se_resize: + return ::LoadCursor(nullptr, IDC_SIZENWSE); + + case eCursor_ne_resize: + case eCursor_sw_resize: + return ::LoadCursor(nullptr, IDC_SIZENESW); + + case eCursor_crosshair: + return ::LoadCursor(nullptr, IDC_CROSS); + + case eCursor_move: + return ::LoadCursor(nullptr, IDC_SIZEALL); + + case eCursor_help: + return ::LoadCursor(nullptr, IDC_HELP); + + case eCursor_copy: // CSS3 + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_COPY)); + + case eCursor_alias: + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ALIAS)); + + case eCursor_cell: + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_CELL)); + case eCursor_grab: + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_GRAB)); + + case eCursor_grabbing: + return ::LoadCursor(nsToolkit::mDllInstance, + MAKEINTRESOURCE(IDC_GRABBING)); + + case eCursor_spinning: + return ::LoadCursor(nullptr, IDC_APPSTARTING); + + case eCursor_zoom_in: + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_ZOOMIN)); + + case eCursor_zoom_out: + return ::LoadCursor(nsToolkit::mDllInstance, + MAKEINTRESOURCE(IDC_ZOOMOUT)); + + case eCursor_not_allowed: + case eCursor_no_drop: + return ::LoadCursor(nullptr, IDC_NO); + + case eCursor_col_resize: + return ::LoadCursor(nsToolkit::mDllInstance, + MAKEINTRESOURCE(IDC_COLRESIZE)); + + case eCursor_row_resize: + return ::LoadCursor(nsToolkit::mDllInstance, + MAKEINTRESOURCE(IDC_ROWRESIZE)); + + case eCursor_vertical_text: + return ::LoadCursor(nsToolkit::mDllInstance, + MAKEINTRESOURCE(IDC_VERTICALTEXT)); + + case eCursor_all_scroll: + // XXX not 100% appropriate perhaps + return ::LoadCursor(nullptr, IDC_SIZEALL); + + case eCursor_nesw_resize: + return ::LoadCursor(nullptr, IDC_SIZENESW); + + case eCursor_nwse_resize: + return ::LoadCursor(nullptr, IDC_SIZENWSE); + + case eCursor_ns_resize: + return ::LoadCursor(nullptr, IDC_SIZENS); + + case eCursor_ew_resize: + return ::LoadCursor(nullptr, IDC_SIZEWE); + + case eCursor_none: + return ::LoadCursor(nsToolkit::mDllInstance, MAKEINTRESOURCE(IDC_NONE)); + + default: + NS_ERROR("Invalid cursor type"); + return nullptr; + } +} + +static HCURSOR CursorForImage(const nsIWidget::Cursor& aCursor, + CSSToLayoutDeviceScale aScale) { + if (!aCursor.IsCustom()) { + return nullptr; + } + + nsIntSize size = nsIWidget::CustomCursorSize(aCursor); + + // Reject cursors greater than 128 pixels in either direction, to prevent + // spoofing. + // XXX ideally we should rescale. Also, we could modify the API to + // allow trusted content to set larger cursors. + if (size.width > 128 || size.height > 128) { + return nullptr; + } + + LayoutDeviceIntSize layoutSize = + RoundedToInt(CSSIntSize(size.width, size.height) * aScale); + LayoutDeviceIntPoint hotspot = + RoundedToInt(CSSIntPoint(aCursor.mHotspotX, aCursor.mHotspotY) * aScale); + HCURSOR cursor; + nsresult rv = nsWindowGfx::CreateIcon(aCursor.mContainer, true, hotspot, + layoutSize, &cursor); + if (NS_FAILED(rv)) { + return nullptr; + } + + return cursor; +} + +void nsWindow::SetCursor(const Cursor& aCursor) { + static HCURSOR sCurrentHCursor = nullptr; + static bool sCurrentHCursorIsCustom = false; + + mCursor = aCursor; + + if (sCurrentCursor == aCursor && sCurrentHCursor && !mUpdateCursor) { + // Cursors in windows are global, so even if our mUpdateCursor flag is + // false we always need to make sure the Windows cursor is up-to-date, + // since stuff like native drag and drop / resizers code can mutate it + // outside of this method. + ::SetCursor(sCurrentHCursor); + return; + } + + mUpdateCursor = false; + + if (sCurrentHCursorIsCustom) { + ::DestroyIcon(sCurrentHCursor); + } + sCurrentHCursor = nullptr; + sCurrentHCursorIsCustom = false; + sCurrentCursor = aCursor; + + HCURSOR cursor = CursorForImage(aCursor, GetDefaultScale()); + bool custom = false; + if (cursor) { + custom = true; + } else { + cursor = CursorFor(aCursor.mDefaultCursor); + } + + if (!cursor) { + return; + } + + sCurrentHCursor = cursor; + sCurrentHCursorIsCustom = custom; + ::SetCursor(cursor); +} + +/************************************************************** + * + * SECTION: nsIWidget::Get/SetTransparencyMode + * + * Manage the transparency mode of the window containing this + * widget. Only works for popup and dialog windows when the + * Desktop Window Manager compositor is not enabled. + * + **************************************************************/ + +TransparencyMode nsWindow::GetTransparencyMode() { + return GetTopLevelWindow(true)->GetWindowTranslucencyInner(); +} + +void nsWindow::SetTransparencyMode(TransparencyMode aMode) { + nsWindow* window = GetTopLevelWindow(true); + MOZ_ASSERT(window); + + if (!window || window->DestroyCalled()) { + return; + } + + if (WindowType::TopLevel == window->mWindowType && + mTransparencyMode != aMode && + !gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + NS_WARNING("Cannot set transparency mode on top-level windows."); + return; + } + + window->SetWindowTranslucencyInner(aMode); +} + +void nsWindow::UpdateOpaqueRegion(const LayoutDeviceIntRegion& aOpaqueRegion) { + if (!HasGlass() || GetParent()) return; + + // If there is no opaque region or hidechrome=true, set margins + // to support a full sheet of glass. Comments in MSDN indicate + // all values must be set to -1 to get a full sheet of glass. + MARGINS margins = {-1, -1, -1, -1}; + if (!aOpaqueRegion.IsEmpty()) { + LayoutDeviceIntRect clientBounds = GetClientBounds(); + // Find the largest rectangle and use that to calculate the inset. + LayoutDeviceIntRect largest = aOpaqueRegion.GetLargestRectangle(); + margins.cxLeftWidth = largest.X(); + margins.cxRightWidth = clientBounds.Width() - largest.XMost(); + margins.cyBottomHeight = clientBounds.Height() - largest.YMost(); + if (mCustomNonClient) { + // The minimum glass height must be the caption buttons height, + // otherwise the buttons are drawn incorrectly. + largest.MoveToY(std::max<uint32_t>( + largest.Y(), nsUXThemeData::GetCommandButtonBoxMetrics().cy)); + } + margins.cyTopHeight = largest.Y(); + } + + // Only update glass area if there are changes + if (memcmp(&mGlassMargins, &margins, sizeof mGlassMargins)) { + mGlassMargins = margins; + UpdateGlass(); + } +} + +/************************************************************** + * + * SECTION: nsIWidget::UpdateWindowDraggingRegion + * + * For setting the draggable titlebar region from CSS + * with -moz-window-dragging: drag. + * + **************************************************************/ + +void nsWindow::UpdateWindowDraggingRegion( + const LayoutDeviceIntRegion& aRegion) { + if (mDraggableRegion != aRegion) { + mDraggableRegion = aRegion; + } +} + +void nsWindow::UpdateGlass() { + MARGINS margins = mGlassMargins; + + // DWMNCRP_USEWINDOWSTYLE - The non-client rendering area is + // rendered based on the window style. + // DWMNCRP_ENABLED - The non-client area rendering is + // enabled; the window style is ignored. + DWMNCRENDERINGPOLICY policy = DWMNCRP_USEWINDOWSTYLE; + switch (mTransparencyMode) { + case TransparencyMode::BorderlessGlass: + // Only adjust if there is some opaque rectangle + if (margins.cxLeftWidth >= 0) { + margins.cxLeftWidth += kGlassMarginAdjustment; + margins.cyTopHeight += kGlassMarginAdjustment; + margins.cxRightWidth += kGlassMarginAdjustment; + margins.cyBottomHeight += kGlassMarginAdjustment; + } + policy = DWMNCRP_ENABLED; + break; + default: + break; + } + + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("glass margins: left:%d top:%d right:%d bottom:%d\n", + margins.cxLeftWidth, margins.cyTopHeight, margins.cxRightWidth, + margins.cyBottomHeight)); + + // Extends the window frame behind the client area + if (gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + DwmExtendFrameIntoClientArea(mWnd, &margins); + DwmSetWindowAttribute(mWnd, DWMWA_NCRENDERING_POLICY, &policy, + sizeof policy); + } +} + +/************************************************************** + * + * SECTION: nsIWidget::HideWindowChrome + * + * Show or hide window chrome. + * + **************************************************************/ + +void nsWindow::HideWindowChrome(bool aShouldHide) { + HWND hwnd = WinUtils::GetTopLevelHWND(mWnd, true); + if (!WinUtils::GetNSWindowPtr(hwnd)) { + NS_WARNING("Trying to hide window decorations in an embedded context"); + return; + } + + if (mHideChrome == aShouldHide) return; + + DWORD_PTR style, exStyle; + mHideChrome = aShouldHide; + if (aShouldHide) { + DWORD_PTR tempStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE); + DWORD_PTR tempExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE); + + style = tempStyle & ~(WS_CAPTION | WS_THICKFRAME); + exStyle = tempExStyle & ~(WS_EX_DLGMODALFRAME | WS_EX_WINDOWEDGE | + WS_EX_CLIENTEDGE | WS_EX_STATICEDGE); + + mOldStyle = tempStyle; + mOldExStyle = tempExStyle; + } else { + if (!mOldStyle || !mOldExStyle) { + mOldStyle = ::GetWindowLongPtrW(hwnd, GWL_STYLE); + mOldExStyle = ::GetWindowLongPtrW(hwnd, GWL_EXSTYLE); + } + + style = mOldStyle; + exStyle = mOldExStyle; + if (mFutureMarginsToUse) { + SetNonClientMargins(mFutureMarginsOnceChromeShows); + } + } + + VERIFY_WINDOW_STYLE(style); + ::SetWindowLongPtrW(hwnd, GWL_STYLE, style); + ::SetWindowLongPtrW(hwnd, GWL_EXSTYLE, exStyle); +} + +/************************************************************** + * + * SECTION: nsWindow::Invalidate + * + * Invalidate an area of the client for painting. + * + **************************************************************/ + +// Invalidate this component visible area +void nsWindow::Invalidate(bool aEraseBackground, bool aUpdateNCArea, + bool aIncludeChildren) { + if (!mWnd) { + return; + } + +#ifdef WIDGET_DEBUG_OUTPUT + debug_DumpInvalidate(stdout, this, nullptr, "noname", (int32_t)mWnd); +#endif // WIDGET_DEBUG_OUTPUT + + DWORD flags = RDW_INVALIDATE; + if (aEraseBackground) { + flags |= RDW_ERASE; + } + if (aUpdateNCArea) { + flags |= RDW_FRAME; + } + if (aIncludeChildren) { + flags |= RDW_ALLCHILDREN; + } + + VERIFY(::RedrawWindow(mWnd, nullptr, nullptr, flags)); +} + +// Invalidate this component visible area +void nsWindow::Invalidate(const LayoutDeviceIntRect& aRect) { + if (mWnd) { +#ifdef WIDGET_DEBUG_OUTPUT + debug_DumpInvalidate(stdout, this, &aRect, "noname", (int32_t)mWnd); +#endif // WIDGET_DEBUG_OUTPUT + + RECT rect; + + rect.left = aRect.X(); + rect.top = aRect.Y(); + rect.right = aRect.XMost(); + rect.bottom = aRect.YMost(); + + VERIFY(::InvalidateRect(mWnd, &rect, FALSE)); + } +} + +static LRESULT CALLBACK FullscreenTransitionWindowProc(HWND hWnd, UINT uMsg, + WPARAM wParam, + LPARAM lParam) { + switch (uMsg) { + case WM_FULLSCREEN_TRANSITION_BEFORE: + case WM_FULLSCREEN_TRANSITION_AFTER: { + DWORD duration = (DWORD)lParam; + DWORD flags = AW_BLEND; + if (uMsg == WM_FULLSCREEN_TRANSITION_AFTER) { + flags |= AW_HIDE; + } + ::AnimateWindow(hWnd, duration, flags); + // The message sender should have added ref for us. + NS_DispatchToMainThread( + already_AddRefed<nsIRunnable>((nsIRunnable*)wParam)); + break; + } + case WM_DESTROY: + ::PostQuitMessage(0); + break; + default: + return ::DefWindowProcW(hWnd, uMsg, wParam, lParam); + } + return 0; +} + +struct FullscreenTransitionInitData { + LayoutDeviceIntRect mBounds; + HANDLE mSemaphore; + HANDLE mThread; + HWND mWnd; + + FullscreenTransitionInitData() + : mSemaphore(nullptr), mThread(nullptr), mWnd(nullptr) {} + + ~FullscreenTransitionInitData() { + if (mSemaphore) { + ::CloseHandle(mSemaphore); + } + if (mThread) { + ::CloseHandle(mThread); + } + } +}; + +static DWORD WINAPI FullscreenTransitionThreadProc(LPVOID lpParam) { + // Initialize window class + static bool sInitialized = false; + if (!sInitialized) { + WNDCLASSW wc = {}; + wc.lpfnWndProc = ::FullscreenTransitionWindowProc; + wc.hInstance = nsToolkit::mDllInstance; + wc.hbrBackground = ::CreateSolidBrush(RGB(0, 0, 0)); + wc.lpszClassName = kClassNameTransition; + ::RegisterClassW(&wc); + sInitialized = true; + } + + auto data = static_cast<FullscreenTransitionInitData*>(lpParam); + HWND wnd = ::CreateWindowW(kClassNameTransition, L"", 0, 0, 0, 0, 0, nullptr, + nullptr, nsToolkit::mDllInstance, nullptr); + if (!wnd) { + ::ReleaseSemaphore(data->mSemaphore, 1, nullptr); + return 0; + } + + // Since AnimateWindow blocks the thread of the transition window, + // we need to hide the cursor for that window, otherwise the system + // would show the busy pointer to the user. + ::ShowCursor(false); + ::SetWindowLongW(wnd, GWL_STYLE, 0); + ::SetWindowLongW( + wnd, GWL_EXSTYLE, + WS_EX_LAYERED | WS_EX_TRANSPARENT | WS_EX_TOOLWINDOW | WS_EX_NOACTIVATE); + ::SetWindowPos(wnd, HWND_TOPMOST, data->mBounds.X(), data->mBounds.Y(), + data->mBounds.Width(), data->mBounds.Height(), 0); + data->mWnd = wnd; + ::ReleaseSemaphore(data->mSemaphore, 1, nullptr); + // The initialization data may no longer be valid + // after we release the semaphore. + data = nullptr; + + MSG msg; + while (::GetMessageW(&msg, nullptr, 0, 0)) { + ::TranslateMessage(&msg); + ::DispatchMessage(&msg); + } + ::ShowCursor(true); + ::DestroyWindow(wnd); + return 0; +} + +class FullscreenTransitionData final : public nsISupports { + public: + NS_DECL_ISUPPORTS + + explicit FullscreenTransitionData(HWND aWnd) : mWnd(aWnd) { + MOZ_ASSERT(NS_IsMainThread(), + "FullscreenTransitionData " + "should be constructed in the main thread"); + } + + const HWND mWnd; + + private: + ~FullscreenTransitionData() { + MOZ_ASSERT(NS_IsMainThread(), + "FullscreenTransitionData " + "should be deconstructed in the main thread"); + ::PostMessageW(mWnd, WM_DESTROY, 0, 0); + } +}; + +NS_IMPL_ISUPPORTS0(FullscreenTransitionData) + +/* virtual */ +bool nsWindow::PrepareForFullscreenTransition(nsISupports** aData) { + // We don't support fullscreen transition when composition is not + // enabled, which could make the transition broken and annoying. + // See bug 1184201. + if (!gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + return false; + } + + FullscreenTransitionInitData initData; + nsCOMPtr<nsIScreen> screen = GetWidgetScreen(); + const DesktopIntRect rect = screen->GetRectDisplayPix(); + MOZ_ASSERT(BoundsUseDesktopPixels(), + "Should only be called on top-level window"); + initData.mBounds = + LayoutDeviceIntRect::Round(rect * GetDesktopToDeviceScale()); + + // Create a semaphore for synchronizing the window handle which will + // be created by the transition thread and used by the main thread for + // posting the transition messages. + initData.mSemaphore = ::CreateSemaphore(nullptr, 0, 1, nullptr); + if (initData.mSemaphore) { + initData.mThread = ::CreateThread( + nullptr, 0, FullscreenTransitionThreadProc, &initData, 0, nullptr); + if (initData.mThread) { + ::WaitForSingleObject(initData.mSemaphore, INFINITE); + } + } + if (!initData.mWnd) { + return false; + } + + mTransitionWnd = initData.mWnd; + + auto data = new FullscreenTransitionData(initData.mWnd); + *aData = data; + NS_ADDREF(data); + return true; +} + +/* virtual */ +void nsWindow::PerformFullscreenTransition(FullscreenTransitionStage aStage, + uint16_t aDuration, + nsISupports* aData, + nsIRunnable* aCallback) { + auto data = static_cast<FullscreenTransitionData*>(aData); + nsCOMPtr<nsIRunnable> callback = aCallback; + UINT msg = aStage == eBeforeFullscreenToggle ? WM_FULLSCREEN_TRANSITION_BEFORE + : WM_FULLSCREEN_TRANSITION_AFTER; + WPARAM wparam = (WPARAM)callback.forget().take(); + ::PostMessage(data->mWnd, msg, wparam, (LPARAM)aDuration); +} + +/* virtual */ +void nsWindow::CleanupFullscreenTransition() { + MOZ_ASSERT(NS_IsMainThread(), + "CleanupFullscreenTransition " + "should only run on the main thread"); + + mTransitionWnd = nullptr; +} + +void nsWindow::TryDwmResizeHack() { + // The "DWM resize hack", aka the "fullscreen resize hack", is a workaround + // for DWM's occasional and not-entirely-predictable failure to update its + // internal state when the client area of a window changes without changing + // the window size. The effect of this is that DWM will clip the content of + // the window to its former client area. + // + // It is not known under what circumstances the bug will trigger. Windows 11 + // is known to be required, but many Windows 11 machines do not exhibit the + // issue. Even machines that _do_ exhibit it will sometimes not do so when + // apparently-irrelevant changes are made to the configuration. (See bug + // 1763981.) + // + // The bug is triggered by Firefox when a maximized window (which has window + // decorations) becomes fullscreen (which doesn't). To work around this, if we + // think it may occur, we "flicker-resize" the relevant window -- that is, we + // reduce its height by 1px, then restore it. This causes DWM to acquire the + // new client-area metrics. + // + // Note that, in particular, this bug will not occur when using a separate + // compositor window, as our compositor windows never have any nonclient area. + // + // This is admittedly a sledgehammer where a screwdriver should suffice. + + // --------------------------------------------------------------------------- + + // Regardless of preferences or heuristics, only apply the hack if this is the + // first time we've entered fullscreen across the entire Firefox session. + // (Subsequent transitions to fullscreen, even with different windows, don't + // appear to induce the bug.) + { + // (main thread only; `atomic` not needed) + static bool sIsFirstFullscreenEntry = true; + bool isFirstFullscreenEntry = sIsFirstFullscreenEntry; + sIsFirstFullscreenEntry = false; + if (MOZ_LIKELY(!isFirstFullscreenEntry)) { + return; + } + MOZ_LOG(gWindowsLog, LogLevel::Verbose, + ("%s: first fullscreen entry", __PRETTY_FUNCTION__)); + } + + // Check whether to try to apply the DWM resize hack, based on the override + // pref and/or some internal heuristics. + { + const auto hackApplicationHeuristics = [&]() -> bool { + // The bug has only been seen under Windows 11. (At time of writing, this + // is the latest version of Windows.) + if (!IsWin11OrLater()) { + return false; + } + + KnowsCompositor const* const kc = mWindowRenderer->AsKnowsCompositor(); + // This should never happen... + MOZ_ASSERT(kc); + // ... so if it does, we are in uncharted territory: don't apply the hack. + if (!kc) { + return false; + } + + // The bug doesn't occur when we're using a separate compositor window + // (since the compositor window always comprises exactly its client area, + // with no non-client border). + if (kc->GetUseCompositorWnd()) { + return false; + } + + // Otherwise, apply the hack. + return true; + }; + + // Figure out whether or not we should perform the hack, and -- arguably + // more importantly -- log that decision. + bool const shouldApplyHack = [&]() { + enum Reason : bool { Pref, Heuristics }; + auto const msg = [&](bool decision, Reason reason) -> bool { + MOZ_LOG(gWindowsLog, LogLevel::Verbose, + ("%s %s per %s", decision ? "applying" : "skipping", + "DWM resize hack", reason == Pref ? "pref" : "heuristics")); + return decision; + }; + switch (StaticPrefs::widget_windows_apply_dwm_resize_hack()) { + case 0: + return msg(false, Pref); + case 1: + return msg(true, Pref); + default: // treat all other values as `auto` + return msg(hackApplicationHeuristics(), Heuristics); + } + }(); + + if (!shouldApplyHack) { + return; + } + } + + // The DWM bug is believed to involve a race condition: some users have + // reported that setting a custom theme or adding unused command-line + // parameters sometimes causes the bug to vanish. + // + // Out of an abundance of caution, we therefore apply the hack in a later + // event, rather than inline. + NS_DispatchToMainThread(NS_NewRunnableFunction( + "nsWindow::TryFullscreenResizeHack", [self = RefPtr(this)]() { + HWND const hwnd = self->GetWindowHandle(); + + if (self->mFrameState->GetSizeMode() != nsSizeMode_Fullscreen) { + MOZ_LOG(gWindowsLog, mozilla::LogLevel::Info, + ("DWM resize hack: window no longer fullscreen; aborting")); + return; + } + + RECT origRect; + if (!::GetWindowRect(hwnd, &origRect)) { + MOZ_LOG(gWindowsLog, mozilla::LogLevel::Error, + ("DWM resize hack: could not get window size?!")); + return; + } + LONG const x = origRect.left; + LONG const y = origRect.top; + LONG const width = origRect.right - origRect.left; + LONG const height = origRect.bottom - origRect.top; + + MOZ_DIAGNOSTIC_ASSERT(!self->mIsPerformingDwmFlushHack); + auto const onExit = + MakeScopeExit([&, oldVal = self->mIsPerformingDwmFlushHack]() { + self->mIsPerformingDwmFlushHack = oldVal; + }); + self->mIsPerformingDwmFlushHack = true; + + MOZ_LOG(gWindowsLog, LogLevel::Debug, + ("beginning DWM resize hack for HWND %08" PRIXPTR, + uintptr_t(hwnd))); + ::MoveWindow(hwnd, x, y, width, height - 1, FALSE); + ::MoveWindow(hwnd, x, y, width, height, TRUE); + MOZ_LOG(gWindowsLog, LogLevel::Debug, + ("concluded DWM resize hack for HWND %08" PRIXPTR, + uintptr_t(hwnd))); + })); +} + +void nsWindow::OnFullscreenChanged(nsSizeMode aOldSizeMode, bool aFullScreen) { + MOZ_ASSERT((aOldSizeMode != nsSizeMode_Fullscreen) == aFullScreen); + + // HACK: Potentially flicker-resize the window, to force DWM to get the right + // client-area information. + if (aFullScreen) { + TryDwmResizeHack(); + } + + // Hide chrome and reposition window. Note this will also cache dimensions for + // restoration, so it should only be called once per fullscreen request. + // + // Don't do this when minimized, since our bounds make no sense then, nor when + // coming back from that state. + const bool toOrFromMinimized = + mFrameState->GetSizeMode() == nsSizeMode_Minimized || + aOldSizeMode == nsSizeMode_Minimized; + if (!toOrFromMinimized) { + InfallibleMakeFullScreen(aFullScreen); + } + + // Possibly notify the taskbar that we have changed our fullscreen mode. + TaskbarConcealer::OnFullscreenChanged(this, aFullScreen); +} + +nsresult nsWindow::MakeFullScreen(bool aFullScreen) { + mFrameState->EnsureFullscreenMode(aFullScreen); + return NS_OK; +} + +/************************************************************** + * + * SECTION: Native data storage + * + * nsIWidget::GetNativeData + * nsIWidget::FreeNativeData + * + * Set or clear native data based on a constant. + * + **************************************************************/ + +// Return some native data according to aDataType +void* nsWindow::GetNativeData(uint32_t aDataType) { + switch (aDataType) { + case NS_NATIVE_WIDGET: + case NS_NATIVE_WINDOW: + case NS_NATIVE_WINDOW_WEBRTC_DEVICE_ID: + return (void*)mWnd; + case NS_NATIVE_GRAPHIC: + MOZ_ASSERT_UNREACHABLE("Not supported on Windows:"); + return nullptr; + case NS_RAW_NATIVE_IME_CONTEXT: { + void* pseudoIMEContext = GetPseudoIMEContext(); + if (pseudoIMEContext) { + return pseudoIMEContext; + } + [[fallthrough]]; + } + case NS_NATIVE_TSF_THREAD_MGR: + case NS_NATIVE_TSF_CATEGORY_MGR: + case NS_NATIVE_TSF_DISPLAY_ATTR_MGR: + return IMEHandler::GetNativeData(this, aDataType); + + default: + break; + } + + return nullptr; +} + +// Free some native data according to aDataType +void nsWindow::FreeNativeData(void* data, uint32_t aDataType) { + switch (aDataType) { + case NS_NATIVE_GRAPHIC: + case NS_NATIVE_WIDGET: + case NS_NATIVE_WINDOW: + break; + default: + break; + } +} + +/************************************************************** + * + * SECTION: nsIWidget::SetTitle + * + * Set the main windows title text. + * + **************************************************************/ + +nsresult nsWindow::SetTitle(const nsAString& aTitle) { + const nsString& strTitle = PromiseFlatString(aTitle); + AutoRestore<bool> sendingText(mSendingSetText); + mSendingSetText = true; + ::SendMessageW(mWnd, WM_SETTEXT, (WPARAM)0, (LPARAM)(LPCWSTR)strTitle.get()); + return NS_OK; +} + +/************************************************************** + * + * SECTION: nsIWidget::SetIcon + * + * Set the main windows icon. + * + **************************************************************/ + +void nsWindow::SetBigIcon(HICON aIcon) { + HICON icon = + (HICON)::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_BIG, (LPARAM)aIcon); + if (icon) { + ::DestroyIcon(icon); + } + + mIconBig = aIcon; +} + +void nsWindow::SetSmallIcon(HICON aIcon) { + HICON icon = (HICON)::SendMessageW(mWnd, WM_SETICON, (WPARAM)ICON_SMALL, + (LPARAM)aIcon); + if (icon) { + ::DestroyIcon(icon); + } + + mIconSmall = aIcon; +} + +void nsWindow::SetIcon(const nsAString& aIconSpec) { + // Assume the given string is a local identifier for an icon file. + + nsCOMPtr<nsIFile> iconFile; + ResolveIconName(aIconSpec, u".ico"_ns, getter_AddRefs(iconFile)); + if (!iconFile) return; + + nsAutoString iconPath; + iconFile->GetPath(iconPath); + + // XXX this should use MZLU (see bug 239279) + + ::SetLastError(0); + + HICON bigIcon = + (HICON)::LoadImageW(nullptr, (LPCWSTR)iconPath.get(), IMAGE_ICON, + ::GetSystemMetrics(SM_CXICON), + ::GetSystemMetrics(SM_CYICON), LR_LOADFROMFILE); + HICON smallIcon = + (HICON)::LoadImageW(nullptr, (LPCWSTR)iconPath.get(), IMAGE_ICON, + ::GetSystemMetrics(SM_CXSMICON), + ::GetSystemMetrics(SM_CYSMICON), LR_LOADFROMFILE); + + if (bigIcon) { + SetBigIcon(bigIcon); + } +#ifdef DEBUG_SetIcon + else { + NS_LossyConvertUTF16toASCII cPath(iconPath); + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("\nIcon load error; icon=%s, rc=0x%08X\n\n", cPath.get(), + ::GetLastError())); + } +#endif + if (smallIcon) { + SetSmallIcon(smallIcon); + } +#ifdef DEBUG_SetIcon + else { + NS_LossyConvertUTF16toASCII cPath(iconPath); + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("\nSmall icon load error; icon=%s, rc=0x%08X\n\n", cPath.get(), + ::GetLastError())); + } +#endif +} + +void nsWindow::SetBigIconNoData() { + HICON bigIcon = + ::LoadIconW(::GetModuleHandleW(nullptr), gStockApplicationIcon); + SetBigIcon(bigIcon); +} + +void nsWindow::SetSmallIconNoData() { + HICON smallIcon = + ::LoadIconW(::GetModuleHandleW(nullptr), gStockApplicationIcon); + SetSmallIcon(smallIcon); +} + +/************************************************************** + * + * SECTION: nsIWidget::WidgetToScreenOffset + * + * Return this widget's origin in screen coordinates. + * + **************************************************************/ + +LayoutDeviceIntPoint nsWindow::WidgetToScreenOffset() { + POINT point; + point.x = 0; + point.y = 0; + ::ClientToScreen(mWnd, &point); + return LayoutDeviceIntPoint(point.x, point.y); +} + +LayoutDeviceIntMargin nsWindow::ClientToWindowMargin() { + if (mWindowType == WindowType::Popup && !IsPopupWithTitleBar()) { + return {}; + } + + if (mCustomNonClient) { + return NonClientSizeMargin(NormalWindowNonClientOffset()); + } + + // Just use a dummy 200x200 at (200, 200) client rect as the rect. + RECT clientRect; + clientRect.left = 200; + clientRect.top = 200; + clientRect.right = 400; + clientRect.bottom = 400; + + auto ToRect = [](const RECT& aRect) -> LayoutDeviceIntRect { + return {aRect.left, aRect.top, aRect.right - aRect.left, + aRect.bottom - aRect.top}; + }; + + RECT windowRect = clientRect; + ::AdjustWindowRectEx(&windowRect, WindowStyle(), false, WindowExStyle()); + + return ToRect(windowRect) - ToRect(clientRect); +} + +/************************************************************** + * + * SECTION: nsIWidget::EnableDragDrop + * + * Enables/Disables drag and drop of files on this widget. + * + **************************************************************/ + +void nsWindow::EnableDragDrop(bool aEnable) { + if (!mWnd) { + // Return early if the window already closed + return; + } + + if (aEnable) { + if (!mNativeDragTarget) { + mNativeDragTarget = new nsNativeDragTarget(this); + mNativeDragTarget->AddRef(); + ::RegisterDragDrop(mWnd, (LPDROPTARGET)mNativeDragTarget); + } + } else { + if (mWnd && mNativeDragTarget) { + ::RevokeDragDrop(mWnd); + mNativeDragTarget->DragCancel(); + NS_RELEASE(mNativeDragTarget); + } + } +} + +/************************************************************** + * + * SECTION: nsIWidget::CaptureMouse + * + * Enables/Disables system mouse capture. + * + **************************************************************/ + +void nsWindow::CaptureMouse(bool aCapture) { + TRACKMOUSEEVENT mTrack; + mTrack.cbSize = sizeof(TRACKMOUSEEVENT); + mTrack.dwHoverTime = 0; + mTrack.hwndTrack = mWnd; + if (aCapture) { + mTrack.dwFlags = TME_CANCEL | TME_LEAVE; + ::SetCapture(mWnd); + } else { + mTrack.dwFlags = TME_LEAVE; + ::ReleaseCapture(); + } + sIsInMouseCapture = aCapture; + TrackMouseEvent(&mTrack); +} + +/************************************************************** + * + * SECTION: nsIWidget::CaptureRollupEvents + * + * Dealing with event rollup on destroy for popups. Enables & + * Disables system capture of any and all events that would + * cause a dropdown to be rolled up. + * + **************************************************************/ + +void nsWindow::CaptureRollupEvents(bool aDoCapture) { + if (aDoCapture) { + if (!sMsgFilterHook && !sCallProcHook && !sCallMouseHook) { + RegisterSpecialDropdownHooks(); + } + sProcessHook = true; + } else { + sProcessHook = false; + UnregisterSpecialDropdownHooks(); + } +} + +/************************************************************** + * + * SECTION: nsIWidget::GetAttention + * + * Bring this window to the user's attention. + * + **************************************************************/ + +// Draw user's attention to this window until it comes to foreground. +nsresult nsWindow::GetAttention(int32_t aCycleCount) { + // Got window? + if (!mWnd) return NS_ERROR_NOT_INITIALIZED; + + HWND flashWnd = WinUtils::GetTopLevelHWND(mWnd, false, false); + HWND fgWnd = ::GetForegroundWindow(); + // Don't flash if the flash count is 0 or if the foreground window is our + // window handle or that of our owned-most window. + if (aCycleCount == 0 || flashWnd == fgWnd || + flashWnd == WinUtils::GetTopLevelHWND(fgWnd, false, false)) { + return NS_OK; + } + + DWORD defaultCycleCount = 0; + ::SystemParametersInfo(SPI_GETFOREGROUNDFLASHCOUNT, 0, &defaultCycleCount, 0); + + FLASHWINFO flashInfo = {sizeof(FLASHWINFO), flashWnd, FLASHW_ALL, + aCycleCount > 0 ? aCycleCount : defaultCycleCount, 0}; + ::FlashWindowEx(&flashInfo); + + return NS_OK; +} + +void nsWindow::StopFlashing() { + HWND flashWnd = mWnd; + while (HWND ownerWnd = ::GetWindow(flashWnd, GW_OWNER)) { + flashWnd = ownerWnd; + } + + FLASHWINFO flashInfo = {sizeof(FLASHWINFO), flashWnd, FLASHW_STOP, 0, 0}; + ::FlashWindowEx(&flashInfo); +} + +/************************************************************** + * + * SECTION: nsIWidget::HasPendingInputEvent + * + * Ask whether there user input events pending. All input events are + * included, including those not targeted at this nsIwidget instance. + * + **************************************************************/ + +bool nsWindow::HasPendingInputEvent() { + // If there is pending input or the user is currently + // moving the window then return true. + // Note: When the user is moving the window WIN32 spins + // a separate event loop and input events are not + // reported to the application. + if (HIWORD(GetQueueStatus(QS_INPUT))) return true; + GUITHREADINFO guiInfo; + guiInfo.cbSize = sizeof(GUITHREADINFO); + if (!GetGUIThreadInfo(GetCurrentThreadId(), &guiInfo)) return false; + return GUI_INMOVESIZE == (guiInfo.flags & GUI_INMOVESIZE); +} + +/************************************************************** + * + * SECTION: nsIWidget::GetWindowRenderer + * + * Get the window renderer associated with this widget. + * + **************************************************************/ + +WindowRenderer* nsWindow::GetWindowRenderer() { + if (mWindowRenderer) { + return mWindowRenderer; + } + + if (!mLocalesChangedObserver) { + mLocalesChangedObserver = new LocalesChangedObserver(this); + } + + // Try OMTC first. + if (!mWindowRenderer && ShouldUseOffMainThreadCompositing()) { + gfxWindowsPlatform::GetPlatform()->UpdateRenderMode(); + CreateCompositor(); + } + + if (!mWindowRenderer) { + MOZ_ASSERT(!mCompositorSession && !mCompositorBridgeChild); + MOZ_ASSERT(!mCompositorWidgetDelegate); + + // Ensure we have a widget proxy even if we're not using the compositor, + // since all our transparent window handling lives there. + WinCompositorWidgetInitData initData( + reinterpret_cast<uintptr_t>(mWnd), + reinterpret_cast<uintptr_t>(static_cast<nsIWidget*>(this)), + mTransparencyMode, mFrameState->GetSizeMode()); + // If we're not using the compositor, the options don't actually matter. + CompositorOptions options(false, false); + mBasicLayersSurface = + new InProcessWinCompositorWidget(initData, options, this); + mCompositorWidgetDelegate = mBasicLayersSurface; + mWindowRenderer = CreateFallbackRenderer(); + } + + NS_ASSERTION(mWindowRenderer, "Couldn't provide a valid window renderer."); + + if (mWindowRenderer) { + // Update the size constraints now that the layer manager has been + // created. + KnowsCompositor* knowsCompositor = mWindowRenderer->AsKnowsCompositor(); + if (knowsCompositor) { + SizeConstraints c = mSizeConstraints; + mMaxTextureSize = knowsCompositor->GetMaxTextureSize(); + c.mMaxSize.width = std::min(c.mMaxSize.width, mMaxTextureSize); + c.mMaxSize.height = std::min(c.mMaxSize.height, mMaxTextureSize); + nsBaseWidget::SetSizeConstraints(c); + } + } + + return mWindowRenderer; +} + +/************************************************************** + * + * SECTION: nsBaseWidget::SetCompositorWidgetDelegate + * + * Called to connect the nsWindow to the delegate providing + * platform compositing API access. + * + **************************************************************/ + +void nsWindow::SetCompositorWidgetDelegate(CompositorWidgetDelegate* delegate) { + if (delegate) { + mCompositorWidgetDelegate = delegate->AsPlatformSpecificDelegate(); + MOZ_ASSERT(mCompositorWidgetDelegate, + "nsWindow::SetCompositorWidgetDelegate called with a " + "non-PlatformCompositorWidgetDelegate"); + } else { + mCompositorWidgetDelegate = nullptr; + } +} + +/************************************************************** + * + * SECTION: nsIWidget::OnDefaultButtonLoaded + * + * Called after the dialog is loaded and it has a default button. + * + **************************************************************/ + +nsresult nsWindow::OnDefaultButtonLoaded( + const LayoutDeviceIntRect& aButtonRect) { + if (aButtonRect.IsEmpty()) return NS_OK; + + // Don't snap when we are not active. + HWND activeWnd = ::GetActiveWindow(); + if (activeWnd != ::GetForegroundWindow() || + WinUtils::GetTopLevelHWND(mWnd, true) != + WinUtils::GetTopLevelHWND(activeWnd, true)) { + return NS_OK; + } + + bool isAlwaysSnapCursor = + Preferences::GetBool("ui.cursor_snapping.always_enabled", false); + + if (!isAlwaysSnapCursor) { + BOOL snapDefaultButton; + if (!::SystemParametersInfo(SPI_GETSNAPTODEFBUTTON, 0, &snapDefaultButton, + 0) || + !snapDefaultButton) + return NS_OK; + } + + LayoutDeviceIntRect widgetRect = GetScreenBounds(); + LayoutDeviceIntRect buttonRect(aButtonRect + widgetRect.TopLeft()); + + LayoutDeviceIntPoint centerOfButton(buttonRect.X() + buttonRect.Width() / 2, + buttonRect.Y() + buttonRect.Height() / 2); + // The center of the button can be outside of the widget. + // E.g., it could be hidden by scrolling. + if (!widgetRect.Contains(centerOfButton)) { + return NS_OK; + } + + if (!::SetCursorPos(centerOfButton.x, centerOfButton.y)) { + NS_ERROR("SetCursorPos failed"); + return NS_ERROR_FAILURE; + } + return NS_OK; +} + +void nsWindow::UpdateThemeGeometries( + const nsTArray<ThemeGeometry>& aThemeGeometries) { + RefPtr<WebRenderLayerManager> layerManager = + GetWindowRenderer() ? GetWindowRenderer()->AsWebRender() : nullptr; + if (!layerManager) { + return; + } + + if (!HasGlass() || + !gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + return; + } + + mWindowButtonsRect = Nothing(); + + if (!IsWin10OrLater()) { + for (size_t i = 0; i < aThemeGeometries.Length(); i++) { + if (aThemeGeometries[i].mType == + nsNativeThemeWin::eThemeGeometryTypeWindowButtons) { + LayoutDeviceIntRect bounds = aThemeGeometries[i].mRect; + // Extend the bounds by one pixel to the right, because that's how much + // the actual window button shape extends past the client area of the + // window (and overlaps the right window frame). + bounds.SetWidth(bounds.Width() + 1); + if (!mWindowButtonsRect) { + mWindowButtonsRect = Some(bounds); + } + } + } + } +} + +void nsWindow::AddWindowOverlayWebRenderCommands( + layers::WebRenderBridgeChild* aWrBridge, wr::DisplayListBuilder& aBuilder, + wr::IpcResourceUpdateQueue& aResources) { + if (mWindowButtonsRect) { + wr::LayoutRect rect = wr::ToLayoutRect(*mWindowButtonsRect); + aBuilder.PushClearRect(rect); + } +} + +uint32_t nsWindow::GetMaxTouchPoints() const { + return WinUtils::GetMaxTouchPoints(); +} + +void nsWindow::SetWindowClass(const nsAString& xulWinType, + const nsAString& xulWinClass, + const nsAString& xulWinName) { + mIsEarlyBlankWindow = xulWinType.EqualsLiteral("navigator:blank"); +} + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Moz Events + ** + ** Moz GUI event management. + ** + ************************************************************** + **************************************************************/ + +/************************************************************** + * + * SECTION: Mozilla event initialization + * + * Helpers for initializing moz events. + * + **************************************************************/ + +// Event initialization +void nsWindow::InitEvent(WidgetGUIEvent& event, LayoutDeviceIntPoint* aPoint) { + if (nullptr == aPoint) { // use the point from the event + // get the message position in client coordinates + if (mWnd != nullptr) { + DWORD pos = ::GetMessagePos(); + POINT cpos; + + cpos.x = GET_X_LPARAM(pos); + cpos.y = GET_Y_LPARAM(pos); + + ::ScreenToClient(mWnd, &cpos); + event.mRefPoint = LayoutDeviceIntPoint(cpos.x, cpos.y); + } else { + event.mRefPoint = LayoutDeviceIntPoint(0, 0); + } + } else { + // use the point override if provided + event.mRefPoint = *aPoint; + } + + event.AssignEventTime(CurrentMessageWidgetEventTime()); +} + +WidgetEventTime nsWindow::CurrentMessageWidgetEventTime() const { + LONG messageTime = ::GetMessageTime(); + return WidgetEventTime(GetMessageTimeStamp(messageTime)); +} + +/************************************************************** + * + * SECTION: Moz event dispatch helpers + * + * Helpers for dispatching different types of moz events. + * + **************************************************************/ + +// Main event dispatch. Invokes callback and ProcessEvent method on +// Event Listener object. Part of nsIWidget. +nsresult nsWindow::DispatchEvent(WidgetGUIEvent* event, + nsEventStatus& aStatus) { +#ifdef WIDGET_DEBUG_OUTPUT + debug_DumpEvent(stdout, event->mWidget, event, "something", (int32_t)mWnd); +#endif // WIDGET_DEBUG_OUTPUT + + aStatus = nsEventStatus_eIgnore; + + // Top level windows can have a view attached which requires events be sent + // to the underlying base window and the view. Added when we combined the + // base chrome window with the main content child for nc client area (title + // bar) rendering. + if (mAttachedWidgetListener) { + aStatus = mAttachedWidgetListener->HandleEvent(event, mUseAttachedEvents); + } else if (mWidgetListener) { + aStatus = mWidgetListener->HandleEvent(event, mUseAttachedEvents); + } + + // the window can be destroyed during processing of seemingly innocuous events + // like, say, mousedowns due to the magic of scripting. mousedowns will return + // nsEventStatus_eIgnore, which causes problems with the deleted window. + // therefore: + if (mOnDestroyCalled) aStatus = nsEventStatus_eConsumeNoDefault; + return NS_OK; +} + +bool nsWindow::DispatchStandardEvent(EventMessage aMsg) { + WidgetGUIEvent event(true, aMsg, this); + InitEvent(event); + + bool result = DispatchWindowEvent(event); + return result; +} + +bool nsWindow::DispatchKeyboardEvent(WidgetKeyboardEvent* event) { + nsEventStatus status = DispatchInputEvent(event).mContentStatus; + return ConvertStatus(status); +} + +bool nsWindow::DispatchContentCommandEvent(WidgetContentCommandEvent* aEvent) { + nsEventStatus status; + DispatchEvent(aEvent, status); + return ConvertStatus(status); +} + +bool nsWindow::DispatchWheelEvent(WidgetWheelEvent* aEvent) { + nsEventStatus status = + DispatchInputEvent(aEvent->AsInputEvent()).mContentStatus; + return ConvertStatus(status); +} + +// Recursively dispatch synchronous paints for nsIWidget +// descendants with invalidated rectangles. +BOOL CALLBACK nsWindow::DispatchStarvedPaints(HWND aWnd, LPARAM aMsg) { + LONG_PTR proc = ::GetWindowLongPtrW(aWnd, GWLP_WNDPROC); + if (proc == (LONG_PTR)&nsWindow::WindowProc) { + // its one of our windows so check to see if it has a + // invalidated rect. If it does. Dispatch a synchronous + // paint. + if (GetUpdateRect(aWnd, nullptr, FALSE)) VERIFY(::UpdateWindow(aWnd)); + } + return TRUE; +} + +// Check for pending paints and dispatch any pending paint +// messages for any nsIWidget which is a descendant of the +// top-level window that *this* window is embedded within. +// +// Note: We do not dispatch pending paint messages for non +// nsIWidget managed windows. +void nsWindow::DispatchPendingEvents() { + // We need to ensure that reflow events do not get starved. + // At the same time, we don't want to recurse through here + // as that would prevent us from dispatching starved paints. + static int recursionBlocker = 0; + if (recursionBlocker++ == 0) { + NS_ProcessPendingEvents(nullptr, PR_MillisecondsToInterval(100)); + --recursionBlocker; + } + + // Quickly check to see if there are any paint events pending, + // but only dispatch them if it has been long enough since the + // last paint completed. + if (::GetQueueStatus(QS_PAINT) && + ((TimeStamp::Now() - mLastPaintEndTime).ToMilliseconds() >= 50)) { + // Find the top level window. + HWND topWnd = WinUtils::GetTopLevelHWND(mWnd); + + // Dispatch pending paints for topWnd and all its descendant windows. + // Note: EnumChildWindows enumerates all descendant windows not just + // the children (but not the window itself). + nsWindow::DispatchStarvedPaints(topWnd, 0); + ::EnumChildWindows(topWnd, nsWindow::DispatchStarvedPaints, 0); + } +} + +void nsWindow::DispatchCustomEvent(const nsString& eventName) { + if (Document* doc = GetDocument()) { + if (nsPIDOMWindowOuter* win = doc->GetWindow()) { + win->DispatchCustomEvent(eventName, ChromeOnlyDispatch::eYes); + } + } +} + +bool nsWindow::TouchEventShouldStartDrag(EventMessage aEventMessage, + LayoutDeviceIntPoint aEventPoint) { + // Allow users to start dragging by double-tapping. + if (aEventMessage == eMouseDoubleClick) { + return true; + } + + // In chrome UI, allow touchdownstartsdrag attributes + // to cause any touchdown event to trigger a drag. + if (aEventMessage == eMouseDown) { + WidgetMouseEvent hittest(true, eMouseHitTest, this, + WidgetMouseEvent::eReal); + hittest.mRefPoint = aEventPoint; + hittest.mIgnoreRootScrollFrame = true; + hittest.mInputSource = MouseEvent_Binding::MOZ_SOURCE_TOUCH; + DispatchInputEvent(&hittest); + + if (EventTarget* target = hittest.GetDOMEventTarget()) { + if (nsIContent* content = nsIContent::FromEventTarget(target)) { + // Check if the element or any parent element has the + // attribute we're looking for. + for (Element* element = content->GetAsElementOrParentElement(); element; + element = element->GetParentElement()) { + nsAutoString startDrag; + element->GetAttribute(u"touchdownstartsdrag"_ns, startDrag); + if (!startDrag.IsEmpty()) { + return true; + } + } + } + } + } + + return false; +} + +// Deal with all sort of mouse event +bool nsWindow::DispatchMouseEvent(EventMessage aEventMessage, WPARAM wParam, + LPARAM lParam, bool aIsContextMenuKey, + int16_t aButton, uint16_t aInputSource, + WinPointerInfo* aPointerInfo, + bool aIgnoreAPZ) { + ContextMenuPreventer contextMenuPreventer(this); + bool result = false; + + UserActivity(); + + if (!mWidgetListener) { + return result; + } + + LayoutDeviceIntPoint eventPoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)); + LayoutDeviceIntPoint mpScreen = eventPoint + WidgetToScreenOffset(); + + // Suppress mouse moves caused by widget creation. Make sure to do this early + // so that we update sLastMouseMovePoint even for touch-induced mousemove + // events. + if (aEventMessage == eMouseMove) { + if ((sLastMouseMovePoint.x == mpScreen.x.value) && + (sLastMouseMovePoint.y == mpScreen.y.value)) { + return result; + } + sLastMouseMovePoint.x = mpScreen.x; + sLastMouseMovePoint.y = mpScreen.y; + } + + if (!aIgnoreAPZ && WinUtils::GetIsMouseFromTouch(aEventMessage)) { + if (mTouchWindow) { + // If mTouchWindow is true, then we must have APZ enabled and be + // feeding it raw touch events. In that case we only want to + // send touch-generated mouse events to content if they should + // start a touch-based drag-and-drop gesture, such as on + // double-tapping or when tapping elements marked with the + // touchdownstartsdrag attribute in chrome UI. + MOZ_ASSERT(mAPZC); + if (TouchEventShouldStartDrag(aEventMessage, eventPoint)) { + aEventMessage = eMouseTouchDrag; + } else { + return result; + } + } + } + + uint32_t pointerId = + aPointerInfo ? aPointerInfo->pointerId : MOUSE_POINTERID(); + + // Since it is unclear whether a user will use the digitizer, + // Postpone initialization until first PEN message will be found. + if (MouseEvent_Binding::MOZ_SOURCE_PEN == aInputSource + // Messages should be only at topLevel window. + && WindowType::TopLevel == mWindowType + // Currently this scheme is used only when pointer events is enabled. + && InkCollector::sInkCollector) { + InkCollector::sInkCollector->SetTarget(mWnd); + InkCollector::sInkCollector->SetPointerId(pointerId); + } + + switch (aEventMessage) { + case eMouseDown: + CaptureMouse(true); + break; + + // eMouseMove and eMouseExitFromWidget are here because we need to make + // sure capture flag isn't left on after a drag where we wouldn't see a + // button up message (see bug 324131). + case eMouseUp: + case eMouseMove: + case eMouseExitFromWidget: + if (!(wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)) && + sIsInMouseCapture) + CaptureMouse(false); + break; + + default: + break; + + } // switch + + WidgetMouseEvent event(true, aEventMessage, this, WidgetMouseEvent::eReal, + aIsContextMenuKey ? WidgetMouseEvent::eContextMenuKey + : WidgetMouseEvent::eNormal); + if (aEventMessage == eContextMenu && aIsContextMenuKey) { + LayoutDeviceIntPoint zero(0, 0); + InitEvent(event, &zero); + } else { + InitEvent(event, &eventPoint); + } + + ModifierKeyState modifierKeyState; + modifierKeyState.InitInputEvent(event); + + // eContextMenu with Shift state is special. It won't fire "contextmenu" + // event in the web content for blocking web content to prevent its default. + // However, Shift+F10 is a standard shortcut key on Windows. Therefore, + // this should not block web page to prevent its default. I.e., it should + // behave same as ContextMenu key without Shift key. + // XXX Should we allow to block web page to prevent its default with + // Ctrl+Shift+F10 or Alt+Shift+F10 instead? + if (aEventMessage == eContextMenu && aIsContextMenuKey && event.IsShift() && + NativeKey::LastKeyOrCharMSG().message == WM_SYSKEYDOWN && + NativeKey::LastKeyOrCharMSG().wParam == VK_F10) { + event.mModifiers &= ~MODIFIER_SHIFT; + } + + event.mButton = aButton; + event.mInputSource = aInputSource; + if (aPointerInfo) { + // Mouse events from Windows WM_POINTER*. Fill more information in + // WidgetMouseEvent. + event.AssignPointerHelperData(*aPointerInfo); + event.mPressure = aPointerInfo->mPressure; + event.mButtons = aPointerInfo->mButtons; + } else { + // If we get here the mouse events must be from non-touch sources, so + // convert it to pointer events as well + event.convertToPointer = true; + event.pointerId = pointerId; + } + + // Static variables used to distinguish simple-, double- and triple-clicks. + static POINT sLastMousePoint = {0}; + static LONG sLastMouseDownTime = 0L; + static LONG sLastClickCount = 0L; + static BYTE sLastMouseButton = 0; + + bool insideMovementThreshold = + (DeprecatedAbs(sLastMousePoint.x - eventPoint.x.value) < + (short)::GetSystemMetrics(SM_CXDOUBLECLK)) && + (DeprecatedAbs(sLastMousePoint.y - eventPoint.y.value) < + (short)::GetSystemMetrics(SM_CYDOUBLECLK)); + + BYTE eventButton; + switch (aButton) { + case MouseButton::ePrimary: + eventButton = VK_LBUTTON; + break; + case MouseButton::eMiddle: + eventButton = VK_MBUTTON; + break; + case MouseButton::eSecondary: + eventButton = VK_RBUTTON; + break; + default: + eventButton = 0; + break; + } + + // Doubleclicks are used to set the click count, then changed to mousedowns + // We're going to time double-clicks from mouse *up* to next mouse *down* + LONG curMsgTime = ::GetMessageTime(); + + switch (aEventMessage) { + case eMouseDoubleClick: + event.mMessage = eMouseDown; + event.mButton = aButton; + sLastClickCount = 2; + sLastMouseDownTime = curMsgTime; + break; + case eMouseUp: + // remember when this happened for the next mouse down + sLastMousePoint.x = eventPoint.x; + sLastMousePoint.y = eventPoint.y; + sLastMouseButton = eventButton; + break; + case eMouseDown: + // now look to see if we want to convert this to a double- or triple-click + if (((curMsgTime - sLastMouseDownTime) < (LONG)::GetDoubleClickTime()) && + insideMovementThreshold && eventButton == sLastMouseButton) { + sLastClickCount++; + } else { + // reset the click count, to count *this* click + sLastClickCount = 1; + } + // Set last Click time on MouseDown only + sLastMouseDownTime = curMsgTime; + break; + case eMouseMove: + if (!insideMovementThreshold) { + sLastClickCount = 0; + } + break; + case eMouseExitFromWidget: + event.mExitFrom = + Some(IsTopLevelMouseExit(mWnd) ? WidgetMouseEvent::ePlatformTopLevel + : WidgetMouseEvent::ePlatformChild); + break; + default: + break; + } + event.mClickCount = sLastClickCount; + +#ifdef NS_DEBUG_XX + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("Msg Time: %d Click Count: %d\n", curMsgTime, event.mClickCount)); +#endif + + // call the event callback + if (mWidgetListener) { + if (aEventMessage == eMouseMove) { + LayoutDeviceIntRect rect = GetBounds(); + rect.MoveTo(0, 0); + + if (rect.Contains(event.mRefPoint)) { + if (sCurrentWindow == nullptr || sCurrentWindow != this) { + if ((nullptr != sCurrentWindow) && (!sCurrentWindow->mInDtor)) { + LPARAM pos = sCurrentWindow->lParamToClient(lParamToScreen(lParam)); + sCurrentWindow->DispatchMouseEvent( + eMouseExitFromWidget, wParam, pos, false, MouseButton::ePrimary, + aInputSource, aPointerInfo); + } + sCurrentWindow = this; + if (!mInDtor) { + LPARAM pos = sCurrentWindow->lParamToClient(lParamToScreen(lParam)); + sCurrentWindow->DispatchMouseEvent( + eMouseEnterIntoWidget, wParam, pos, false, + MouseButton::ePrimary, aInputSource, aPointerInfo); + } + } + } + } else if (aEventMessage == eMouseExitFromWidget) { + if (sCurrentWindow == this) { + sCurrentWindow = nullptr; + } + } + + nsIWidget::ContentAndAPZEventStatus eventStatus = + DispatchInputEvent(&event); + contextMenuPreventer.Update(event, eventStatus); + return ConvertStatus(eventStatus.mContentStatus); + } + + return result; +} + +HWND nsWindow::GetTopLevelForFocus(HWND aCurWnd) { + // retrieve the toplevel window or dialogue + HWND toplevelWnd = nullptr; + while (aCurWnd) { + toplevelWnd = aCurWnd; + nsWindow* win = WinUtils::GetNSWindowPtr(aCurWnd); + if (win) { + if (win->mWindowType == WindowType::TopLevel || + win->mWindowType == WindowType::Dialog) { + break; + } + } + + aCurWnd = ::GetParent(aCurWnd); // Parent or owner (if has no parent) + } + return toplevelWnd; +} + +void nsWindow::DispatchFocusToTopLevelWindow(bool aIsActivate) { + if (aIsActivate) { + sJustGotActivate = false; + } + sJustGotDeactivate = false; + mLastKillFocusWindow = nullptr; + + HWND toplevelWnd = GetTopLevelForFocus(mWnd); + + if (toplevelWnd) { + nsWindow* win = WinUtils::GetNSWindowPtr(toplevelWnd); + if (win && win->mWidgetListener) { + if (aIsActivate) { + win->mWidgetListener->WindowActivated(); + } else { + win->mWidgetListener->WindowDeactivated(); + } + } + } +} + +HWND nsWindow::WindowAtMouse() { + DWORD pos = ::GetMessagePos(); + POINT mp; + mp.x = GET_X_LPARAM(pos); + mp.y = GET_Y_LPARAM(pos); + return ::WindowFromPoint(mp); +} + +bool nsWindow::IsTopLevelMouseExit(HWND aWnd) { + HWND mouseWnd = WindowAtMouse(); + + // WinUtils::GetTopLevelHWND() will return a HWND for the window frame + // (which includes the non-client area). If the mouse has moved into + // the non-client area, we should treat it as a top-level exit. + HWND mouseTopLevel = WinUtils::GetTopLevelHWND(mouseWnd); + if (mouseWnd == mouseTopLevel) return true; + + return WinUtils::GetTopLevelHWND(aWnd) != mouseTopLevel; +} + +/************************************************************** + * + * SECTION: IPC + * + * IPC related helpers. + * + **************************************************************/ + +// static +bool nsWindow::IsAsyncResponseEvent(UINT aMsg, LRESULT& aResult) { + switch (aMsg) { + case WM_SETFOCUS: + case WM_KILLFOCUS: + case WM_ENABLE: + case WM_WINDOWPOSCHANGING: + case WM_WINDOWPOSCHANGED: + case WM_PARENTNOTIFY: + case WM_ACTIVATEAPP: + case WM_NCACTIVATE: + case WM_ACTIVATE: + case WM_CHILDACTIVATE: + case WM_IME_SETCONTEXT: + case WM_IME_NOTIFY: + case WM_SHOWWINDOW: + case WM_CANCELMODE: + case WM_MOUSEACTIVATE: + case WM_CONTEXTMENU: + aResult = 0; + return true; + + case WM_SETTINGCHANGE: + case WM_SETCURSOR: + return false; + } + +#ifdef DEBUG + char szBuf[200]; + sprintf(szBuf, + "An unhandled ISMEX_SEND message was received during spin loop! (%X)", + aMsg); + NS_WARNING(szBuf); +#endif + + return false; +} + +void nsWindow::IPCWindowProcHandler(UINT& msg, WPARAM& wParam, LPARAM& lParam) { + MOZ_ASSERT_IF( + msg != WM_GETOBJECT, + !mozilla::ipc::MessageChannel::IsPumpingMessages() || + mozilla::ipc::SuppressedNeuteringRegion::IsNeuteringSuppressed()); + + // Modal UI being displayed in windowless plugins. + if (mozilla::ipc::MessageChannel::IsSpinLoopActive() && + (InSendMessageEx(nullptr) & (ISMEX_REPLIED | ISMEX_SEND)) == ISMEX_SEND) { + LRESULT res; + if (IsAsyncResponseEvent(msg, res)) { + ReplyMessage(res); + } + return; + } + + // Handle certain sync plugin events sent to the parent which + // trigger ipc calls that result in deadlocks. + + DWORD dwResult = 0; + bool handled = false; + + switch (msg) { + // Windowless flash sending WM_ACTIVATE events to the main window + // via calls to ShowWindow. + case WM_ACTIVATE: + if (lParam != 0 && LOWORD(wParam) == WA_ACTIVE && + IsWindow((HWND)lParam)) { + // Check for Adobe Reader X sync activate message from their + // helper window and ignore. Fixes an annoying focus problem. + if ((InSendMessageEx(nullptr) & (ISMEX_REPLIED | ISMEX_SEND)) == + ISMEX_SEND) { + wchar_t szClass[10]; + HWND focusWnd = (HWND)lParam; + if (IsWindowVisible(focusWnd) && + GetClassNameW(focusWnd, szClass, + sizeof(szClass) / sizeof(char16_t)) && + !wcscmp(szClass, L"Edit") && + !WinUtils::IsOurProcessWindow(focusWnd)) { + break; + } + } + handled = true; + } + break; + // Plugins taking or losing focus triggering focus app messages. + case WM_SETFOCUS: + case WM_KILLFOCUS: + // Windowed plugins that pass sys key events to defwndproc generate + // WM_SYSCOMMAND events to the main window. + case WM_SYSCOMMAND: + // Windowed plugins that fire context menu selection events to parent + // windows. + case WM_CONTEXTMENU: + // IME events fired as a result of synchronous focus changes + case WM_IME_SETCONTEXT: + handled = true; + break; + } + + if (handled && + (InSendMessageEx(nullptr) & (ISMEX_REPLIED | ISMEX_SEND)) == ISMEX_SEND) { + ReplyMessage(dwResult); + } +} + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Native events + ** + ** Main Windows message handlers and OnXXX handlers for + ** Windows event handling. + ** + ************************************************************** + **************************************************************/ + +/************************************************************** + * + * SECTION: Wind proc. + * + * The main Windows event procedures and associated + * message processing methods. + * + **************************************************************/ + +static bool DisplaySystemMenu(HWND hWnd, nsSizeMode sizeMode, bool isRtl, + int32_t x, int32_t y) { + HMENU hMenu = GetSystemMenu(hWnd, FALSE); + if (hMenu) { + MENUITEMINFO mii; + mii.cbSize = sizeof(MENUITEMINFO); + mii.fMask = MIIM_STATE; + mii.fType = 0; + + // update the options + mii.fState = MF_ENABLED; + SetMenuItemInfo(hMenu, SC_RESTORE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_SIZE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_MOVE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_MAXIMIZE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_MINIMIZE, FALSE, &mii); + + mii.fState = MF_GRAYED; + switch (sizeMode) { + case nsSizeMode_Fullscreen: + // intentional fall through + case nsSizeMode_Maximized: + SetMenuItemInfo(hMenu, SC_SIZE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_MOVE, FALSE, &mii); + SetMenuItemInfo(hMenu, SC_MAXIMIZE, FALSE, &mii); + break; + case nsSizeMode_Minimized: + SetMenuItemInfo(hMenu, SC_MINIMIZE, FALSE, &mii); + break; + case nsSizeMode_Normal: + SetMenuItemInfo(hMenu, SC_RESTORE, FALSE, &mii); + break; + case nsSizeMode_Invalid: + NS_ASSERTION(false, "Did the argument come from invalid IPC?"); + break; + default: + MOZ_ASSERT_UNREACHABLE("Unhnalded nsSizeMode value detected"); + break; + } + LPARAM cmd = TrackPopupMenu( + hMenu, + (TPM_LEFTBUTTON | TPM_RIGHTBUTTON | TPM_RETURNCMD | TPM_TOPALIGN | + (isRtl ? TPM_RIGHTALIGN : TPM_LEFTALIGN)), + x, y, 0, hWnd, nullptr); + if (cmd) { + PostMessage(hWnd, WM_SYSCOMMAND, cmd, 0); + return true; + } + } + return false; +} + +// The WndProc procedure for all nsWindows in this toolkit. This merely catches +// SEH exceptions and passes the real work to WindowProcInternal. See bug 587406 +// and http://msdn.microsoft.com/en-us/library/ms633573%28VS.85%29.aspx +LRESULT CALLBACK nsWindow::WindowProc(HWND hWnd, UINT msg, WPARAM wParam, + LPARAM lParam) { + mozilla::ipc::CancelCPOWs(); + + BackgroundHangMonitor().NotifyActivity(); + + return mozilla::CallWindowProcCrashProtected(WindowProcInternal, hWnd, msg, + wParam, lParam); +} + +namespace geckoprofiler::markers { + +struct WindowProcMarker { + static constexpr Span<const char> MarkerTypeName() { + return MakeStringSpan("WindowProc"); + } + static void StreamJSONMarkerData(baseprofiler::SpliceableJSONWriter& aWriter, + UINT aMsg, WPARAM aWParam, LPARAM aLParam) { + aWriter.IntProperty("uMsg", aMsg); + const char* name; + if (aMsg < WM_USER) { + const auto eventMsgInfo = mozilla::widget::gAllEvents.find(aMsg); + if (eventMsgInfo != mozilla::widget::gAllEvents.end()) { + name = eventMsgInfo->second.mStr; + } else { + name = "ui message"; + } + } else if (aMsg >= WM_USER && aMsg < WM_APP) { + name = "WM_USER message"; + } else if (aMsg >= WM_APP && aMsg < 0xC000) { + name = "WM_APP message"; + } else if (aMsg >= 0xC000 && aMsg < 0x10000) { + name = "registered windows message"; + } else { + name = "system message"; + } + aWriter.StringProperty("name", MakeStringSpan(name)); + + if (aWParam) { + aWriter.IntProperty("wParam", aWParam); + } + if (aLParam) { + aWriter.IntProperty("lParam", aLParam); + } + } + + static MarkerSchema MarkerTypeDisplay() { + using MS = MarkerSchema; + MS schema{MS::Location::MarkerChart, MS::Location::MarkerTable}; + schema.AddKeyFormat("uMsg", MS::Format::Integer); + schema.SetChartLabel("{marker.data.name} ({marker.data.uMsg})"); + schema.SetTableLabel( + "{marker.name} - {marker.data.name} ({marker.data.uMsg})"); + schema.SetTooltipLabel("{marker.name} - {marker.data.name}"); + schema.AddKeyFormat("wParam", MS::Format::Integer); + schema.AddKeyFormat("lParam", MS::Format::Integer); + return schema; + } +}; + +} // namespace geckoprofiler::markers + +class MOZ_RAII AutoProfilerMessageMarker { + public: + explicit AutoProfilerMessageMarker(HWND hWnd, UINT msg, WPARAM wParam, + LPARAM lParam) + : mMsg(msg), mWParam(wParam), mLParam(lParam) { + if (profiler_thread_is_being_profiled_for_markers()) { + mOptions.emplace(MarkerOptions(MarkerTiming::IntervalStart())); + nsWindow* win = WinUtils::GetNSWindowPtr(hWnd); + if (win) { + nsIWidgetListener* wl = win->GetWidgetListener(); + if (wl) { + PresShell* presShell = wl->GetPresShell(); + if (presShell) { + Document* doc = presShell->GetDocument(); + if (doc) { + mOptions->Set(MarkerInnerWindowId(doc->InnerWindowID())); + } + } + } + } + } + } + + ~AutoProfilerMessageMarker() { + if (!profiler_thread_is_being_profiled_for_markers()) { + return; + } + + if (mOptions) { + mOptions->TimingRef().SetIntervalEnd(); + } else { + mOptions.emplace(MarkerOptions(MarkerTiming::IntervalEnd())); + } + profiler_add_marker("WindowProc", ::mozilla::baseprofiler::category::OTHER, + std::move(*mOptions), + geckoprofiler::markers::WindowProcMarker{}, mMsg, + mWParam, mLParam); + } + + protected: + Maybe<MarkerOptions> mOptions; + UINT mMsg; + WPARAM mWParam; + LPARAM mLParam; +}; + +LRESULT CALLBACK nsWindow::WindowProcInternal(HWND hWnd, UINT msg, + WPARAM wParam, LPARAM lParam) { + AutoProfilerMessageMarker marker(hWnd, msg, wParam, lParam); + + if (::GetWindowLongPtrW(hWnd, GWLP_ID) == eFakeTrackPointScrollableID) { + // This message was sent to the FAKETRACKPOINTSCROLLABLE. + if (msg == WM_HSCROLL) { + // Route WM_HSCROLL messages to the main window. + hWnd = ::GetParent(::GetParent(hWnd)); + } else { + // Handle all other messages with its original window procedure. + WNDPROC prevWindowProc = (WNDPROC)::GetWindowLongPtr(hWnd, GWLP_USERDATA); + return ::CallWindowProcW(prevWindowProc, hWnd, msg, wParam, lParam); + } + } + + if (msg == MOZ_WM_TRACE) { + // This is a tracer event for measuring event loop latency. + // See WidgetTraceEvent.cpp for more details. + mozilla::SignalTracerThread(); + return 0; + } + + // Get the window which caused the event and ask it to process the message + nsWindow* targetWindow = WinUtils::GetNSWindowPtr(hWnd); + NS_ASSERTION(targetWindow, "nsWindow* is null!"); + if (!targetWindow) return ::DefWindowProcW(hWnd, msg, wParam, lParam); + + // Hold the window for the life of this method, in case it gets + // destroyed during processing, unless we're in the dtor already. + nsCOMPtr<nsIWidget> kungFuDeathGrip; + if (!targetWindow->mInDtor) kungFuDeathGrip = targetWindow; + + targetWindow->IPCWindowProcHandler(msg, wParam, lParam); + + // Create this here so that we store the last rolled up popup until after + // the event has been processed. + nsAutoRollup autoRollup; + + LRESULT popupHandlingResult; + if (DealWithPopups(hWnd, msg, wParam, lParam, &popupHandlingResult)) + return popupHandlingResult; + + // Call ProcessMessage + LRESULT retValue; + if (targetWindow->ProcessMessage(msg, wParam, lParam, &retValue)) { + return retValue; + } + + LRESULT res = ::CallWindowProcW(targetWindow->GetPrevWindowProc(), hWnd, msg, + wParam, lParam); + + return res; +} + +const char16_t* GetQuitType() { + if (Preferences::GetBool(PREF_WIN_REGISTER_APPLICATION_RESTART, false)) { + DWORD cchCmdLine = 0; + HRESULT rc = ::GetApplicationRestartSettings(::GetCurrentProcess(), nullptr, + &cchCmdLine, nullptr); + if (rc == S_OK) { + return u"os-restart"; + } + } + return nullptr; +} + +bool nsWindow::ExternalHandlerProcessMessage(UINT aMessage, WPARAM& aWParam, + LPARAM& aLParam, + MSGResult& aResult) { + if (mWindowHook.Notify(mWnd, aMessage, aWParam, aLParam, aResult)) { + return true; + } + + if (IMEHandler::ProcessMessage(this, aMessage, aWParam, aLParam, aResult)) { + return true; + } + + if (MouseScrollHandler::ProcessMessage(this, aMessage, aWParam, aLParam, + aResult)) { + return true; + } + + return false; +} + +// The main windows message processing method. Wraps ProcessMessageInternal so +// we can log aRetValue. +bool nsWindow::ProcessMessage(UINT msg, WPARAM& wParam, LPARAM& lParam, + LRESULT* aRetValue) { + // For some events we might change the parameter values, so log + // before and after we process them. + PrintEvent printEvent(mWnd, msg, wParam, lParam); + bool result = ProcessMessageInternal(msg, wParam, lParam, aRetValue); + printEvent.SetResult(*aRetValue, result); + + return result; +} + +// The main windows message processing method. Called by ProcessMessage. +bool nsWindow::ProcessMessageInternal(UINT msg, WPARAM& wParam, LPARAM& lParam, + LRESULT* aRetValue) { + MSGResult msgResult(aRetValue); + if (ExternalHandlerProcessMessage(msg, wParam, lParam, msgResult)) { + return (msgResult.mConsumed || !mWnd); + } + + bool result = false; // call the default nsWindow proc + *aRetValue = 0; + + // The DWM resize hack (see bug 1763981) causes us to process a number of + // messages, notably including some WM_WINDOWPOSCHANG{ING,ED} messages which + // would ordinarily result in a whole lot of internal state being updated. + // + // Since we're supposed to end in the same state we started in (and since the + // content shouldn't know about any of this nonsense), just discard any + // messages synchronously dispatched from within the hack. + if (MOZ_UNLIKELY(mIsPerformingDwmFlushHack)) { + return true; + } + + // Glass hit testing w/custom transparent margins + LRESULT dwmHitResult; + if (mCustomNonClient && + gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled() && + /* We don't do this for win10 glass with a custom titlebar, + * in order to avoid the caption buttons breaking. */ + !(IsWin10OrLater() && HasGlass()) && + DwmDefWindowProc(mWnd, msg, wParam, lParam, &dwmHitResult)) { + *aRetValue = dwmHitResult; + return true; + } + + // The preference whether to use a different keyboard layout for each + // window is cached, and updating it will not take effect until the + // next restart. We read the preference here and not upon WM_ACTIVATE to make + // sure that this behavior is consistent. Otherwise, if the user changed the + // preference before having ever lowered the window, the preference would take + // effect immediately. + static const bool sSwitchKeyboardLayout = + Preferences::GetBool("intl.keyboard.per_window_layout", false); + AppShutdownReason shutdownReason = AppShutdownReason::Unknown; + + // (Large blocks of code should be broken out into OnEvent handlers.) + switch (msg) { + // WM_QUERYENDSESSION must be handled by all windows. + // Otherwise Windows thinks the window can just be killed at will. + case WM_QUERYENDSESSION: { + // Ask around if it's ok to quit. + nsCOMPtr<nsIObserverService> obsServ = + mozilla::services::GetObserverService(); + nsCOMPtr<nsISupportsPRBool> cancelQuitWrapper = + do_CreateInstance(NS_SUPPORTS_PRBOOL_CONTRACTID); + cancelQuitWrapper->SetData(false); + + const char16_t* quitType = GetQuitType(); + obsServ->NotifyObservers(cancelQuitWrapper, "quit-application-requested", + quitType); + + bool shouldCancelQuit; + cancelQuitWrapper->GetData(&shouldCancelQuit); + *aRetValue = !shouldCancelQuit; + result = true; + } break; + + case MOZ_WM_STARTA11Y: +#if defined(ACCESSIBILITY) + Unused << GetAccessible(); + result = true; +#else + result = false; +#endif + break; + + case WM_ENDSESSION: { + // For WM_ENDSESSION, wParam indicates whether we need to shutdown + // (TRUE) or not (FALSE). + if (!wParam) { + result = true; + break; + } + // According to WM_ENDSESSION lParam documentation: + // 0 -> OS shutdown or restart (no way to distinguish) + // ENDSESSION_LOGOFF -> User is logging off + // ENDSESSION_CLOSEAPP -> Application must shutdown + // ENDSESSION_CRITICAL -> Application is forced to shutdown + // The difference of the last two is not very clear. + if (lParam == 0) { + shutdownReason = AppShutdownReason::OSShutdown; + } else if (lParam & ENDSESSION_LOGOFF) { + shutdownReason = AppShutdownReason::OSSessionEnd; + } else if (lParam & (ENDSESSION_CLOSEAPP | ENDSESSION_CRITICAL)) { + shutdownReason = AppShutdownReason::OSForceClose; + } else { + MOZ_DIAGNOSTIC_ASSERT(false, + "Received WM_ENDSESSION with unknown flags."); + shutdownReason = AppShutdownReason::OSForceClose; + } + } + [[fallthrough]]; + case MOZ_WM_APP_QUIT: { + if (shutdownReason == AppShutdownReason::Unknown) { + // TODO: We do not expect that these days anybody sends us + // MOZ_WM_APP_QUIT, see bug 1827807. + shutdownReason = AppShutdownReason::WinUnexpectedMozQuit; + } + // Let's fake a shutdown sequence without actually closing windows etc. + // to avoid Windows killing us in the middle. A proper shutdown would + // require having a chance to pump some messages. Unfortunately + // Windows won't let us do that. Bug 212316. + nsCOMPtr<nsIObserverService> obsServ = + mozilla::services::GetObserverService(); + const char16_t* syncShutdown = u"syncShutdown"; + const char16_t* quitType = GetQuitType(); + + AppShutdown::Init(AppShutdownMode::Normal, 0, shutdownReason); + + obsServ->NotifyObservers(nullptr, "quit-application-granted", + syncShutdown); + obsServ->NotifyObservers(nullptr, "quit-application-forced", nullptr); + + AppShutdown::OnShutdownConfirmed(); + + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdownConfirmed, + quitType); + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdownNetTeardown, + nullptr); + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdownTeardown, + nullptr); + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdown, nullptr); + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdownQM, nullptr); + AppShutdown::AdvanceShutdownPhase(ShutdownPhase::AppShutdownTelemetry, + nullptr); + + AppShutdown::DoImmediateExit(); + MOZ_ASSERT_UNREACHABLE("Our process was supposed to exit."); + } break; + + case WM_SYSCOLORCHANGE: + // No need to invalidate layout for system color changes, but we need to + // invalidate style. + NotifyThemeChanged(widget::ThemeChangeKind::Style); + break; + + case WM_THEMECHANGED: { + // Update non-client margin offsets + UpdateNonClientMargins(); + nsUXThemeData::UpdateNativeThemeInfo(); + + // We assume pretty much everything could've changed here. + NotifyThemeChanged(widget::ThemeChangeKind::StyleAndLayout); + + UpdateDarkModeToolbar(); + + // Invalidate the window so that the repaint will + // pick up the new theme. + Invalidate(true, true, true); + } break; + + case WM_WTSSESSION_CHANGE: { + switch (wParam) { + case WTS_CONSOLE_CONNECT: + case WTS_REMOTE_CONNECT: + case WTS_SESSION_UNLOCK: + // When a session becomes visible, we should invalidate. + Invalidate(true, true, true); + break; + default: + break; + } + } break; + + case WM_FONTCHANGE: { + // We only handle this message for the hidden window, + // as we only need to update the (global) font list once + // for any given change, not once per window! + if (mWindowType != WindowType::Invisible) { + break; + } + + // update the global font list + gfxPlatform::GetPlatform()->UpdateFontList(); + } break; + + case WM_SETTINGCHANGE: { + if (wParam == SPI_SETCLIENTAREAANIMATION || + wParam == SPI_SETKEYBOARDDELAY) { + // These need to update LookAndFeel cached values. + // They affect reduced motion settings / caret blink count / and + // keyboard cues, so no need to invalidate style / layout. + NotifyThemeChanged(widget::ThemeChangeKind::MediaQueriesOnly); + break; + } + if (wParam == SPI_SETFONTSMOOTHING || + wParam == SPI_SETFONTSMOOTHINGTYPE) { + gfxDWriteFont::UpdateSystemTextVars(); + break; + } + if (wParam == SPI_SETWORKAREA) { + // NB: We also refresh screens on WM_DISPLAYCHANGE but the rcWork + // values are sometimes wrong at that point. This message then + // arrives soon afterward, when we can get the right rcWork values. + ScreenHelperWin::RefreshScreens(); + break; + } + if (auto lParamString = reinterpret_cast<const wchar_t*>(lParam)) { + if (!wcscmp(lParamString, L"ImmersiveColorSet")) { + // This affects system colors (-moz-win-accentcolor), so gotta pass + // the style flag. + NotifyThemeChanged(widget::ThemeChangeKind::Style); + break; + } + + // UserInteractionMode, ConvertibleSlateMode, SystemDockMode may cause + // @media(pointer) queries to change, which layout needs to know about + // + // (WM_SETTINGCHANGE will be sent to all top-level windows, so we + // only respond to the hidden top-level window to avoid hammering + // layout with a bunch of NotifyThemeChanged() calls) + // + if (mWindowType == WindowType::Invisible) { + if (!wcscmp(lParamString, L"UserInteractionMode") || + !wcscmp(lParamString, L"ConvertibleSlateMode") || + !wcscmp(lParamString, L"SystemDockMode")) { + NotifyThemeChanged(widget::ThemeChangeKind::MediaQueriesOnly); + WindowsUIUtils::UpdateInTabletMode(); + } + } + } + + // SPI_GETMOUSEVANISH sends WM_SETTINGCHANGE when changed but does + // not include identifiers in the parameters. WM_SETTINGCHANGE docs + // recommend updating all cached settings when this message is received + // anyway. + GetMouseVanishSystemPref(true); + } break; + + case WM_DEVICECHANGE: { + if (wParam == DBT_DEVICEARRIVAL || wParam == DBT_DEVICEREMOVECOMPLETE) { + DEV_BROADCAST_HDR* hdr = reinterpret_cast<DEV_BROADCAST_HDR*>(lParam); + // Check dbch_devicetype explicitly since we will get other device types + // (e.g. DBT_DEVTYP_VOLUME) for some reasons even if we specify + // DBT_DEVTYP_DEVICEINTERFACE in the filter for + // RegisterDeviceNotification. + if (hdr->dbch_devicetype == DBT_DEVTYP_DEVICEINTERFACE) { + // This can only change media queries (any-hover/any-pointer). + NotifyThemeChanged(widget::ThemeChangeKind::MediaQueriesOnly); + } + } + } break; + + case WM_NCCALCSIZE: { + // NOTE: the following block is mirrored in PreXULSkeletonUI.cpp, and + // will need to be kept in sync. + if (mCustomNonClient) { + // If `wParam` is `FALSE`, `lParam` points to a `RECT` that contains + // the proposed window rectangle for our window. During our + // processing of the `WM_NCCALCSIZE` message, we are expected to + // modify the `RECT` that `lParam` points to, so that its value upon + // our return is the new client area. We must return 0 if `wParam` + // is `FALSE`. + // + // If `wParam` is `TRUE`, `lParam` points to a `NCCALCSIZE_PARAMS` + // struct. This struct contains an array of 3 `RECT`s, the first of + // which has the exact same meaning as the `RECT` that is pointed to + // by `lParam` when `wParam` is `FALSE`. The remaining `RECT`s, in + // conjunction with our return value, can + // be used to specify portions of the source and destination window + // rectangles that are valid and should be preserved. We opt not to + // implement an elaborate client-area preservation technique, and + // simply return 0, which means "preserve the entire old client area + // and align it with the upper-left corner of our new client area". + RECT* clientRect = + wParam ? &(reinterpret_cast<NCCALCSIZE_PARAMS*>(lParam))->rgrc[0] + : (reinterpret_cast<RECT*>(lParam)); + auto margin = NonClientSizeMargin(); + clientRect->top += margin.top; + clientRect->left += margin.left; + clientRect->right -= margin.right; + clientRect->bottom -= margin.bottom; + // Make client rect's width and height more than 0 to + // avoid problems of webrender and angle. + clientRect->right = std::max(clientRect->right, clientRect->left + 1); + clientRect->bottom = std::max(clientRect->bottom, clientRect->top + 1); + + result = true; + *aRetValue = 0; + } + break; + } + + case WM_NCHITTEST: { + if (mInputRegion.mFullyTransparent) { + // Treat this window as transparent. + *aRetValue = HTTRANSPARENT; + result = true; + break; + } + + if (mInputRegion.mMargin) { + const LayoutDeviceIntPoint screenPoint(GET_X_LPARAM(lParam), + GET_Y_LPARAM(lParam)); + LayoutDeviceIntRect screenRect = GetScreenBounds(); + screenRect.Deflate(mInputRegion.mMargin); + if (!screenRect.Contains(screenPoint)) { + *aRetValue = HTTRANSPARENT; + result = true; + break; + } + } + + /* + * If an nc client area margin has been moved, we are responsible + * for calculating where the resize margins are and returning the + * appropriate set of hit test constants. DwmDefWindowProc (above) + * will handle hit testing on it's command buttons if we are on a + * composited desktop. + */ + + if (!mCustomNonClient) { + break; + } + + *aRetValue = + ClientMarginHitTestPoint(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)); + result = true; + break; + } + + case WM_SETTEXT: + /* + * WM_SETTEXT paints the titlebar area. Avoid this if we have a + * custom titlebar we paint ourselves, or if we're the ones + * sending the message with an updated title + */ + + if ((mSendingSetText && + gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) || + !mCustomNonClient || mNonClientMargins.top == -1) + break; + + { + // From msdn, the way around this is to disable the visible state + // temporarily. We need the text to be set but we don't want the + // redraw to occur. However, we need to make sure that we don't + // do this at the same time that a Present is happening. + // + // To do this we take mPresentLock in nsWindow::PreRender and + // if that lock is taken we wait before doing WM_SETTEXT + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->EnterPresentLock(); + } + DWORD style = GetWindowLong(mWnd, GWL_STYLE); + SetWindowLong(mWnd, GWL_STYLE, style & ~WS_VISIBLE); + *aRetValue = + CallWindowProcW(GetPrevWindowProc(), mWnd, msg, wParam, lParam); + SetWindowLong(mWnd, GWL_STYLE, style); + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->LeavePresentLock(); + } + + return true; + } + + case WM_NCACTIVATE: { + /* + * WM_NCACTIVATE paints nc areas. Avoid this and re-route painting + * through WM_NCPAINT via InvalidateNonClientRegion. + */ + UpdateGetWindowInfoCaptionStatus(FALSE != wParam); + + if (!mCustomNonClient) { + break; + } + + // There is a case that rendered result is not kept. Bug 1237617 + if (wParam == TRUE && !gfxEnv::MOZ_DISABLE_FORCE_PRESENT() && + gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) { + NS_DispatchToMainThread(NewRunnableMethod( + "nsWindow::ForcePresent", this, &nsWindow::ForcePresent)); + } + + // let the dwm handle nc painting on glass + // Never allow native painting if we are on fullscreen + if (mFrameState->GetSizeMode() != nsSizeMode_Fullscreen && + gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) + break; + + if (wParam == TRUE) { + // going active + *aRetValue = FALSE; // ignored + result = true; + // invalidate to trigger a paint + InvalidateNonClientRegion(); + break; + } else { + // going inactive + *aRetValue = TRUE; // go ahead and deactive + result = true; + // invalidate to trigger a paint + InvalidateNonClientRegion(); + break; + } + } + + case WM_NCPAINT: { + /* + * ClearType changes often don't send a WM_SETTINGCHANGE message. But they + * do seem to always send a WM_NCPAINT message, so let's update on that. + */ + gfxDWriteFont::UpdateSystemTextVars(); + + /* + * Reset the non-client paint region so that it excludes the + * non-client areas we paint manually. Then call defwndproc + * to do the actual painting. + */ + + if (!mCustomNonClient) break; + + // let the dwm handle nc painting on glass + if (gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled()) break; + + HRGN paintRgn = ExcludeNonClientFromPaintRegion((HRGN)wParam); + LRESULT res = CallWindowProcW(GetPrevWindowProc(), mWnd, msg, + (WPARAM)paintRgn, lParam); + if (paintRgn != (HRGN)wParam) DeleteObject(paintRgn); + *aRetValue = res; + result = true; + } break; + + case WM_POWERBROADCAST: + switch (wParam) { + case PBT_APMSUSPEND: + PostSleepWakeNotification(true); + break; + case PBT_APMRESUMEAUTOMATIC: + case PBT_APMRESUMECRITICAL: + case PBT_APMRESUMESUSPEND: + PostSleepWakeNotification(false); + break; + } + break; + + case WM_CLOSE: // close request + if (mWidgetListener) mWidgetListener->RequestWindowClose(this); + result = true; // abort window closure + break; + + case WM_DESTROY: + // clean up. + DestroyLayerManager(); + OnDestroy(); + result = true; + break; + + case WM_PAINT: + *aRetValue = (int)OnPaint(nullptr, 0); + result = true; + break; + + case WM_PRINTCLIENT: + result = OnPaint((HDC)wParam, 0); + break; + + case WM_HOTKEY: + result = OnHotKey(wParam, lParam); + break; + + case WM_SYSCHAR: + case WM_CHAR: { + MSG nativeMsg = WinUtils::InitMSG(msg, wParam, lParam, mWnd); + result = ProcessCharMessage(nativeMsg, nullptr); + DispatchPendingEvents(); + } break; + + case WM_SYSKEYUP: + case WM_KEYUP: { + MSG nativeMsg = WinUtils::InitMSG(msg, wParam, lParam, mWnd); + nativeMsg.time = ::GetMessageTime(); + result = ProcessKeyUpMessage(nativeMsg, nullptr); + DispatchPendingEvents(); + } break; + + case WM_SYSKEYDOWN: + case WM_KEYDOWN: { + if (IsMouseVanishKey(wParam)) { + MaybeHideCursor(true); + } + + MSG nativeMsg = WinUtils::InitMSG(msg, wParam, lParam, mWnd); + result = ProcessKeyDownMessage(nativeMsg, nullptr); + DispatchPendingEvents(); + } break; + + // Say we've dealt with erasing the background. (This is actually handled in + // WM_PAINT, where necessary.) + case WM_ERASEBKGND: { + *aRetValue = 1; + result = true; + } break; + + case WM_MOUSEMOVE: { + MaybeHideCursor(false); + + LPARAM lParamScreen = lParamToScreen(lParam); + mSimulatedClientArea = IsSimulatedClientArea(GET_X_LPARAM(lParamScreen), + GET_Y_LPARAM(lParamScreen)); + + if (!mMousePresent && !sIsInMouseCapture) { + // First MOUSEMOVE over the client area. Ask for MOUSELEAVE + TRACKMOUSEEVENT mTrack; + mTrack.cbSize = sizeof(TRACKMOUSEEVENT); + mTrack.dwFlags = TME_LEAVE; + mTrack.dwHoverTime = 0; + mTrack.hwndTrack = mWnd; + TrackMouseEvent(&mTrack); + } + mMousePresent = true; + + // Suppress dispatch of pending events + // when mouse moves are generated by widget + // creation instead of user input. + POINT mp; + mp.x = GET_X_LPARAM(lParamScreen); + mp.y = GET_Y_LPARAM(lParamScreen); + bool userMovedMouse = false; + if ((sLastMouseMovePoint.x != mp.x) || (sLastMouseMovePoint.y != mp.y)) { + userMovedMouse = true; + } + + if (userMovedMouse) { + result = DispatchMouseEvent( + eMouseMove, wParam, lParam, false, MouseButton::ePrimary, + MOUSE_INPUT_SOURCE(), + mPointerEvents.GetCachedPointerInfo(msg, wParam)); + DispatchPendingEvents(); + } + } break; + + case WM_NCMOUSEMOVE: { + MaybeHideCursor(false); + + LPARAM lParamClient = lParamToClient(lParam); + if (IsSimulatedClientArea(GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam))) { + if (!sIsInMouseCapture) { + TRACKMOUSEEVENT mTrack; + mTrack.cbSize = sizeof(TRACKMOUSEEVENT); + mTrack.dwFlags = TME_LEAVE | TME_NONCLIENT; + mTrack.dwHoverTime = 0; + mTrack.hwndTrack = mWnd; + TrackMouseEvent(&mTrack); + } + // If we noticed the mouse moving in our draggable region, forward the + // message as a normal WM_MOUSEMOVE. + SendMessage(mWnd, WM_MOUSEMOVE, 0, lParamClient); + } else { + // We've transitioned from a draggable area to somewhere else within + // the non-client area - perhaps one of the edges of the window for + // resizing. + mSimulatedClientArea = false; + } + + if (mMousePresent && !sIsInMouseCapture && !mSimulatedClientArea) { + SendMessage(mWnd, WM_MOUSELEAVE, 0, 0); + } + } break; + + case WM_LBUTTONDOWN: { + MaybeHideCursor(false); + + result = + DispatchMouseEvent(eMouseDown, wParam, lParam, false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE(), + mPointerEvents.GetCachedPointerInfo(msg, wParam)); + DispatchPendingEvents(); + } break; + + case WM_LBUTTONUP: { + result = + DispatchMouseEvent(eMouseUp, wParam, lParam, false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE(), + mPointerEvents.GetCachedPointerInfo(msg, wParam)); + DispatchPendingEvents(); + } break; + + case WM_NCMOUSELEAVE: { + mSimulatedClientArea = false; + + if (EventIsInsideWindow(this)) { + // If we're handling WM_NCMOUSELEAVE and the mouse is still over the + // window, then by process of elimination, the mouse has moved from the + // non-client to client area, so no need to fall-through to the + // WM_MOUSELEAVE handler. We also need to re-register for the + // WM_MOUSELEAVE message, since according to the documentation at [1], + // all tracking requested via TrackMouseEvent is cleared once + // WM_NCMOUSELEAVE or WM_MOUSELEAVE fires. + // [1]: + // https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-trackmouseevent + TRACKMOUSEEVENT mTrack; + mTrack.cbSize = sizeof(TRACKMOUSEEVENT); + mTrack.dwFlags = TME_LEAVE; + mTrack.dwHoverTime = 0; + mTrack.hwndTrack = mWnd; + TrackMouseEvent(&mTrack); + break; + } + // We've transitioned from non-client to outside of the window, so + // fall-through to the WM_MOUSELEAVE handler. + [[fallthrough]]; + } + case WM_MOUSELEAVE: { + if (!mMousePresent) break; + if (mSimulatedClientArea) break; + mMousePresent = false; + + // Check if the mouse is over the fullscreen transition window, if so + // clear sLastMouseMovePoint. This way the WM_MOUSEMOVE we get after the + // transition window disappears will not be ignored, even if the mouse + // hasn't moved. + if (mTransitionWnd && WindowAtMouse() == mTransitionWnd) { + sLastMouseMovePoint = {0}; + } + + // We need to check mouse button states and put them in for + // wParam. + WPARAM mouseState = (GetKeyState(VK_LBUTTON) ? MK_LBUTTON : 0) | + (GetKeyState(VK_MBUTTON) ? MK_MBUTTON : 0) | + (GetKeyState(VK_RBUTTON) ? MK_RBUTTON : 0); + // Synthesize an event position because we don't get one from + // WM_MOUSELEAVE. + LPARAM pos = lParamToClient(::GetMessagePos()); + DispatchMouseEvent(eMouseExitFromWidget, mouseState, pos, false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE()); + } break; + + case MOZ_WM_PEN_LEAVES_HOVER_OF_DIGITIZER: { + LPARAM pos = lParamToClient(::GetMessagePos()); + MOZ_ASSERT(InkCollector::sInkCollector); + uint16_t pointerId = InkCollector::sInkCollector->GetPointerId(); + if (pointerId != 0) { + WinPointerInfo pointerInfo; + pointerInfo.pointerId = pointerId; + DispatchMouseEvent(eMouseExitFromWidget, wParam, pos, false, + MouseButton::ePrimary, + MouseEvent_Binding::MOZ_SOURCE_PEN, &pointerInfo); + InkCollector::sInkCollector->ClearTarget(); + InkCollector::sInkCollector->ClearPointerId(); + } + } break; + + case WM_CONTEXTMENU: { + // If the context menu is brought up by a touch long-press, then + // the APZ code is responsible for dealing with this, so we don't + // need to do anything. + if (mTouchWindow && + MOUSE_INPUT_SOURCE() == MouseEvent_Binding::MOZ_SOURCE_TOUCH) { + MOZ_ASSERT(mAPZC); // since mTouchWindow is true, APZ must be enabled + result = true; + break; + } + + // If this WM_CONTEXTMENU is triggered by a mouse's secondary button up + // event in overscroll gutter, we shouldn't open context menu. + if (MOUSE_INPUT_SOURCE() == MouseEvent_Binding::MOZ_SOURCE_MOUSE && + mNeedsToPreventContextMenu) { + result = true; + break; + } + + // if the context menu is brought up from the keyboard, |lParam| + // will be -1. + LPARAM pos; + bool contextMenukey = false; + if (lParam == -1) { + contextMenukey = true; + pos = lParamToClient(GetMessagePos()); + } else { + pos = lParamToClient(lParam); + } + + result = DispatchMouseEvent( + eContextMenu, wParam, pos, contextMenukey, + contextMenukey ? MouseButton::ePrimary : MouseButton::eSecondary, + MOUSE_INPUT_SOURCE()); + if (lParam != -1 && !result && mCustomNonClient && + mDraggableRegion.Contains(GET_X_LPARAM(pos), GET_Y_LPARAM(pos))) { + // Blank area hit, throw up the system menu. + DisplaySystemMenu(mWnd, mFrameState->GetSizeMode(), mIsRTL, + GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam)); + result = true; + } + } break; + + case WM_POINTERLEAVE: + case WM_POINTERDOWN: + case WM_POINTERUP: + case WM_POINTERUPDATE: + MaybeHideCursor(false); + result = OnPointerEvents(msg, wParam, lParam); + if (result) { + DispatchPendingEvents(); + } + break; + + case DM_POINTERHITTEST: + if (mDmOwner) { + UINT contactId = GET_POINTERID_WPARAM(wParam); + POINTER_INPUT_TYPE pointerType; + if (mPointerEvents.GetPointerType(contactId, &pointerType) && + pointerType == PT_TOUCHPAD) { + mDmOwner->SetContact(contactId); + } + } + break; + + case WM_LBUTTONDBLCLK: + MaybeHideCursor(false); + result = DispatchMouseEvent(eMouseDoubleClick, wParam, lParam, false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_MBUTTONDOWN: + MaybeHideCursor(false); + result = DispatchMouseEvent(eMouseDown, wParam, lParam, false, + MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_MBUTTONUP: + result = DispatchMouseEvent(eMouseUp, wParam, lParam, false, + MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_MBUTTONDBLCLK: + MaybeHideCursor(false); + result = DispatchMouseEvent(eMouseDoubleClick, wParam, lParam, false, + MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCMBUTTONDOWN: + MaybeHideCursor(false); + result = DispatchMouseEvent(eMouseDown, 0, lParamToClient(lParam), false, + MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCMBUTTONUP: + result = DispatchMouseEvent(eMouseUp, 0, lParamToClient(lParam), false, + MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCMBUTTONDBLCLK: + MaybeHideCursor(false); + result = + DispatchMouseEvent(eMouseDoubleClick, 0, lParamToClient(lParam), + false, MouseButton::eMiddle, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_RBUTTONDOWN: + MaybeHideCursor(false); + result = + DispatchMouseEvent(eMouseDown, wParam, lParam, false, + MouseButton::eSecondary, MOUSE_INPUT_SOURCE(), + mPointerEvents.GetCachedPointerInfo(msg, wParam)); + DispatchPendingEvents(); + break; + + case WM_RBUTTONUP: + result = + DispatchMouseEvent(eMouseUp, wParam, lParam, false, + MouseButton::eSecondary, MOUSE_INPUT_SOURCE(), + mPointerEvents.GetCachedPointerInfo(msg, wParam)); + DispatchPendingEvents(); + break; + + case WM_RBUTTONDBLCLK: + MaybeHideCursor(false); + result = + DispatchMouseEvent(eMouseDoubleClick, wParam, lParam, false, + MouseButton::eSecondary, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCRBUTTONDOWN: + MaybeHideCursor(false); + result = + DispatchMouseEvent(eMouseDown, 0, lParamToClient(lParam), false, + MouseButton::eSecondary, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCRBUTTONUP: + result = + DispatchMouseEvent(eMouseUp, 0, lParamToClient(lParam), false, + MouseButton::eSecondary, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCRBUTTONDBLCLK: + MaybeHideCursor(false); + result = DispatchMouseEvent(eMouseDoubleClick, 0, lParamToClient(lParam), + false, MouseButton::eSecondary, + MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + // Windows doesn't provide to customize the behavior of 4th nor 5th button + // of mouse. If 5-button mouse works with standard mouse deriver of + // Windows, users cannot disable 4th button (browser back) nor 5th button + // (browser forward). We should allow to do it with our prefs since we can + // prevent Windows to generate WM_APPCOMMAND message if WM_XBUTTONUP + // messages are not sent to DefWindowProc. + case WM_XBUTTONDOWN: + case WM_XBUTTONUP: + case WM_NCXBUTTONDOWN: + case WM_NCXBUTTONUP: + MaybeHideCursor(false); + + *aRetValue = TRUE; + switch (GET_XBUTTON_WPARAM(wParam)) { + case XBUTTON1: + result = !Preferences::GetBool("mousebutton.4th.enabled", true); + break; + case XBUTTON2: + result = !Preferences::GetBool("mousebutton.5th.enabled", true); + break; + default: + break; + } + break; + + case WM_SIZING: { + if (mAspectRatio > 0) { + LPRECT rect = (LPRECT)lParam; + int32_t newWidth, newHeight; + + // The following conditions and switch statement borrow heavily from the + // Chromium source code from + // https://chromium.googlesource.com/chromium/src/+/456d6e533cfb4531995e0ef52c279d4b5aa8a352/ui/views/window/window_resize_utils.cc#45 + if (wParam == WMSZ_LEFT || wParam == WMSZ_RIGHT || + wParam == WMSZ_TOPLEFT || wParam == WMSZ_BOTTOMLEFT) { + newWidth = rect->right - rect->left; + newHeight = newWidth / mAspectRatio; + if (newHeight < mSizeConstraints.mMinSize.height) { + newHeight = mSizeConstraints.mMinSize.height; + newWidth = newHeight * mAspectRatio; + } else if (newHeight > mSizeConstraints.mMaxSize.height) { + newHeight = mSizeConstraints.mMaxSize.height; + newWidth = newHeight * mAspectRatio; + } + } else { + newHeight = rect->bottom - rect->top; + newWidth = newHeight * mAspectRatio; + if (newWidth < mSizeConstraints.mMinSize.width) { + newWidth = mSizeConstraints.mMinSize.width; + newHeight = newWidth / mAspectRatio; + } else if (newWidth > mSizeConstraints.mMaxSize.width) { + newWidth = mSizeConstraints.mMaxSize.width; + newHeight = newWidth / mAspectRatio; + } + } + + switch (wParam) { + case WMSZ_RIGHT: + case WMSZ_BOTTOM: + rect->right = newWidth + rect->left; + rect->bottom = rect->top + newHeight; + break; + case WMSZ_TOP: + rect->right = newWidth + rect->left; + rect->top = rect->bottom - newHeight; + break; + case WMSZ_LEFT: + case WMSZ_TOPLEFT: + rect->left = rect->right - newWidth; + rect->top = rect->bottom - newHeight; + break; + case WMSZ_TOPRIGHT: + rect->right = rect->left + newWidth; + rect->top = rect->bottom - newHeight; + break; + case WMSZ_BOTTOMLEFT: + rect->left = rect->right - newWidth; + rect->bottom = rect->top + newHeight; + break; + case WMSZ_BOTTOMRIGHT: + rect->right = rect->left + newWidth; + rect->bottom = rect->top + newHeight; + break; + } + } + + // When we get WM_ENTERSIZEMOVE we don't know yet if we're in a live + // resize or move event. Instead we wait for first VM_SIZING message + // within a ENTERSIZEMOVE to consider this a live resize event. + if (mResizeState == IN_SIZEMOVE) { + mResizeState = RESIZING; + NotifyLiveResizeStarted(); + } + break; + } + + case WM_MOVING: + FinishLiveResizing(MOVING); + if (WinUtils::IsPerMonitorDPIAware()) { + // Sometimes, we appear to miss a WM_DPICHANGED message while moving + // a window around. Therefore, call ChangedDPI and ResetLayout here + // if it appears that the window's scaling is not what we expect. + // This causes the prescontext and appshell window management code to + // check the appUnitsPerDevPixel value and current widget size, and + // refresh them if necessary. If nothing has changed, these calls will + // return without actually triggering any extra reflow or painting. + if (WinUtils::LogToPhysFactor(mWnd) != mDefaultScale) { + ChangedDPI(); + ResetLayout(); + if (mWidgetListener) { + mWidgetListener->UIResolutionChanged(); + } + } + } + break; + + case WM_ENTERSIZEMOVE: { + if (mResizeState == NOT_RESIZING) { + mResizeState = IN_SIZEMOVE; + } + break; + } + + case WM_EXITSIZEMOVE: { + FinishLiveResizing(NOT_RESIZING); + + if (!sIsInMouseCapture) { + NotifySizeMoveDone(); + } + + break; + } + + case WM_DISPLAYCHANGE: { + ScreenHelperWin::RefreshScreens(); + if (mWidgetListener) { + mWidgetListener->UIResolutionChanged(); + } + break; + } + + case WM_NCLBUTTONDBLCLK: + DispatchMouseEvent(eMouseDoubleClick, 0, lParamToClient(lParam), false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE()); + result = DispatchMouseEvent(eMouseUp, 0, lParamToClient(lParam), false, + MouseButton::ePrimary, MOUSE_INPUT_SOURCE()); + DispatchPendingEvents(); + break; + + case WM_NCLBUTTONDOWN: { + // Dispatch a custom event when this happens in the draggable region, so + // that non-popup-based panels can react to it. This doesn't send an + // actual mousedown event because that would break dragging or interfere + // with other mousedown handling in the caption area. + if (ClientMarginHitTestPoint(GET_X_LPARAM(lParam), + GET_Y_LPARAM(lParam)) == HTCAPTION) { + DispatchCustomEvent(u"draggableregionleftmousedown"_ns); + } + + if (IsWindowButton(wParam) && mCustomNonClient && !mWindowButtonsRect) { + DispatchMouseEvent(eMouseDown, wParamFromGlobalMouseState(), + lParamToClient(lParam), false, MouseButton::ePrimary, + MOUSE_INPUT_SOURCE(), nullptr, true); + DispatchPendingEvents(); + result = true; + } + break; + } + + case WM_APPCOMMAND: { + MSG nativeMsg = WinUtils::InitMSG(msg, wParam, lParam, mWnd); + result = HandleAppCommandMsg(nativeMsg, aRetValue); + break; + } + + // The WM_ACTIVATE event is fired when a window is raised or lowered, + // and the loword of wParam specifies which. But we don't want to tell + // the focus system about this until the WM_SETFOCUS or WM_KILLFOCUS + // events are fired. Instead, set either the sJustGotActivate or + // gJustGotDeactivate flags and activate/deactivate once the focus + // events arrive. + case WM_ACTIVATE: { + int32_t fActive = LOWORD(wParam); + if (!fActive) { + MaybeHideCursor(false); + } + + if (mWidgetListener) { + if (WA_INACTIVE == fActive) { + // when minimizing a window, the deactivation and focus events will + // be fired in the reverse order. Instead, just deactivate right away. + // This can also happen when a modal system dialog is opened, so check + // if the last window to receive the WM_KILLFOCUS message was this one + // or a child of this one. + if (HIWORD(wParam) || + (mLastKillFocusWindow && + (GetTopLevelForFocus(mLastKillFocusWindow) == mWnd))) { + DispatchFocusToTopLevelWindow(false); + } else { + sJustGotDeactivate = true; + } + if (mIsTopWidgetWindow) { + mLastKeyboardLayout = KeyboardLayout::GetInstance()->GetLayout(); + } + } else { + StopFlashing(); + + sJustGotActivate = true; + WidgetMouseEvent event(true, eMouseActivate, this, + WidgetMouseEvent::eReal); + InitEvent(event); + ModifierKeyState modifierKeyState; + modifierKeyState.InitInputEvent(event); + DispatchInputEvent(&event); + if (sSwitchKeyboardLayout && mLastKeyboardLayout) + ActivateKeyboardLayout(mLastKeyboardLayout, 0); + } + } + } break; + + case WM_ACTIVATEAPP: { + // Bug 1851991: Sometimes this can be called before gfxPlatform::Init + // when a window is created very early. In that case we just forego + // setting this and accept the GPU process might briefly run at a lower + // priority. + if (GPUProcessManager::Get()) { + GPUProcessManager::Get()->SetAppInForeground(wParam); + } + } break; + + case WM_MOUSEACTIVATE: + // A popup with a parent owner should not be activated when clicked but + // should still allow the mouse event to be fired, so the return value + // is set to MA_NOACTIVATE. But if the owner isn't the frontmost window, + // just use default processing so that the window is activated. + if (IsPopup() && IsOwnerForegroundWindow()) { + *aRetValue = MA_NOACTIVATE; + result = true; + } + break; + + case WM_WINDOWPOSCHANGING: { + LPWINDOWPOS info = (LPWINDOWPOS)lParam; + OnWindowPosChanging(info); + result = true; + } break; + + case WM_GETMINMAXINFO: { + MINMAXINFO* mmi = (MINMAXINFO*)lParam; + // Set the constraints. The minimum size should also be constrained to the + // default window maximum size so that it fits on screen. + mmi->ptMinTrackSize.x = + std::min((int32_t)mmi->ptMaxTrackSize.x, + std::max((int32_t)mmi->ptMinTrackSize.x, + mSizeConstraints.mMinSize.width)); + mmi->ptMinTrackSize.y = + std::min((int32_t)mmi->ptMaxTrackSize.y, + std::max((int32_t)mmi->ptMinTrackSize.y, + mSizeConstraints.mMinSize.height)); + mmi->ptMaxTrackSize.x = std::min((int32_t)mmi->ptMaxTrackSize.x, + mSizeConstraints.mMaxSize.width); + mmi->ptMaxTrackSize.y = std::min((int32_t)mmi->ptMaxTrackSize.y, + mSizeConstraints.mMaxSize.height); + } break; + + case WM_SETFOCUS: { + WndProcUrgentInvocation::Marker _marker; + + // If previous focused window isn't ours, it must have received the + // redirected message. So, we should forget it. + if (!WinUtils::IsOurProcessWindow(HWND(wParam))) { + RedirectedKeyDownMessageManager::Forget(); + } + if (sJustGotActivate) { + DispatchFocusToTopLevelWindow(true); + } + TaskbarConcealer::OnFocusAcquired(this); + } break; + + case WM_KILLFOCUS: + if (sJustGotDeactivate) { + DispatchFocusToTopLevelWindow(false); + } else { + mLastKillFocusWindow = mWnd; + } + break; + + case WM_WINDOWPOSCHANGED: { + WINDOWPOS* wp = (LPWINDOWPOS)lParam; + OnWindowPosChanged(wp); + TaskbarConcealer::OnWindowPosChanged(this); + result = true; + } break; + + case WM_INPUTLANGCHANGEREQUEST: + *aRetValue = TRUE; + result = false; + break; + + case WM_INPUTLANGCHANGE: + KeyboardLayout::GetInstance()->OnLayoutChange( + reinterpret_cast<HKL>(lParam)); + nsBidiKeyboard::OnLayoutChange(); + result = false; // always pass to child window + break; + + case WM_DESTROYCLIPBOARD: { + nsIClipboard* clipboard; + nsresult rv = CallGetService(kCClipboardCID, &clipboard); + if (NS_SUCCEEDED(rv)) { + clipboard->EmptyClipboard(nsIClipboard::kGlobalClipboard); + NS_RELEASE(clipboard); + } + } break; + +#ifdef ACCESSIBILITY + case WM_GETOBJECT: { + *aRetValue = 0; + // Do explicit casting to make it working on 64bit systems (see bug 649236 + // for details). + int32_t objId = static_cast<DWORD>(lParam); + if (objId == OBJID_CLIENT) { // oleacc.dll will be loaded dynamically + RefPtr<IAccessible> root( + a11y::LazyInstantiator::GetRootAccessible(mWnd)); + if (root) { + *aRetValue = LresultFromObject(IID_IAccessible, wParam, root); + a11y::LazyInstantiator::EnableBlindAggregation(mWnd); + result = true; + } + } + } break; +#endif + + case WM_SYSCOMMAND: { + WPARAM const filteredWParam = (wParam & 0xFFF0); + + // SC_CLOSE may trigger a synchronous confirmation prompt. If we're in the + // middle of something important, put off responding to it. + if (filteredWParam == SC_CLOSE && WndProcUrgentInvocation::IsActive()) { + ::PostMessageW(mWnd, msg, wParam, lParam); + result = true; + break; + } + + if (mFrameState->GetSizeMode() == nsSizeMode_Fullscreen && + filteredWParam == SC_RESTORE && + GetCurrentShowCmd(mWnd) != SW_SHOWMINIMIZED) { + mFrameState->EnsureFullscreenMode(false); + result = true; + } + + // Handle the system menu manually when we're in full screen mode + // so we can set the appropriate options. + if (filteredWParam == SC_KEYMENU && lParam == VK_SPACE && + mFrameState->GetSizeMode() == nsSizeMode_Fullscreen) { + DisplaySystemMenu(mWnd, mFrameState->GetSizeMode(), mIsRTL, + MOZ_SYSCONTEXT_X_POS, MOZ_SYSCONTEXT_Y_POS); + result = true; + } + } break; + + case WM_DWMCOMPOSITIONCHANGED: + // Every window will get this message, but gfxVars only broadcasts + // updates when the value actually changes + if (XRE_IsParentProcess()) { + BOOL dwmEnabled = FALSE; + if (FAILED(::DwmIsCompositionEnabled(&dwmEnabled)) || !dwmEnabled) { + gfxVars::SetDwmCompositionEnabled(false); + } else { + gfxVars::SetDwmCompositionEnabled(true); + } + } + + UpdateNonClientMargins(); + BroadcastMsg(mWnd, WM_DWMCOMPOSITIONCHANGED); + // TODO: Why is NotifyThemeChanged needed, what does it affect? And can we + // make it more granular by tweaking the ChangeKind we pass? + NotifyThemeChanged(widget::ThemeChangeKind::StyleAndLayout); + UpdateGlass(); + Invalidate(true, true, true); + break; + + case WM_DPICHANGED: { + LPRECT rect = (LPRECT)lParam; + OnDPIChanged(rect->left, rect->top, rect->right - rect->left, + rect->bottom - rect->top); + break; + } + + /* Gesture support events */ + case WM_TABLET_QUERYSYSTEMGESTURESTATUS: + // According to MS samples, this must be handled to enable + // rotational support in multi-touch drivers. + result = true; + *aRetValue = TABLET_ROTATE_GESTURE_ENABLE; + break; + + case WM_TOUCH: + result = OnTouch(wParam, lParam); + if (result) { + *aRetValue = 0; + } + break; + + case WM_GESTURE: + result = OnGesture(wParam, lParam); + break; + + case WM_GESTURENOTIFY: { + if (mWindowType != WindowType::Invisible) { + // A GestureNotify event is dispatched to decide which single-finger + // panning direction should be active (including none) and if pan + // feedback should be displayed. Java and plugin windows can make their + // own calls. + + GESTURENOTIFYSTRUCT* gestureinfo = (GESTURENOTIFYSTRUCT*)lParam; + nsPointWin touchPoint; + touchPoint = gestureinfo->ptsLocation; + touchPoint.ScreenToClient(mWnd); + WidgetGestureNotifyEvent gestureNotifyEvent(true, eGestureNotify, this); + gestureNotifyEvent.mRefPoint = + LayoutDeviceIntPoint::FromUnknownPoint(touchPoint); + nsEventStatus status; + DispatchEvent(&gestureNotifyEvent, status); + mDisplayPanFeedback = gestureNotifyEvent.mDisplayPanFeedback; + if (!mTouchWindow) + mGesture.SetWinGestureSupport(mWnd, gestureNotifyEvent.mPanDirection); + } + result = false; // should always bubble to DefWindowProc + } break; + + case WM_CLEAR: { + WidgetContentCommandEvent command(true, eContentCommandDelete, this); + DispatchWindowEvent(command); + result = true; + } break; + + case WM_CUT: { + WidgetContentCommandEvent command(true, eContentCommandCut, this); + DispatchWindowEvent(command); + result = true; + } break; + + case WM_COPY: { + WidgetContentCommandEvent command(true, eContentCommandCopy, this); + DispatchWindowEvent(command); + result = true; + } break; + + case WM_PASTE: { + WidgetContentCommandEvent command(true, eContentCommandPaste, this); + DispatchWindowEvent(command); + result = true; + } break; + + case EM_UNDO: { + WidgetContentCommandEvent command(true, eContentCommandUndo, this); + DispatchWindowEvent(command); + *aRetValue = (LRESULT)(command.mSucceeded && command.mIsEnabled); + result = true; + } break; + + case EM_REDO: { + WidgetContentCommandEvent command(true, eContentCommandRedo, this); + DispatchWindowEvent(command); + *aRetValue = (LRESULT)(command.mSucceeded && command.mIsEnabled); + result = true; + } break; + + case EM_CANPASTE: { + // Support EM_CANPASTE message only when wParam isn't specified or + // is plain text format. + if (wParam == 0 || wParam == CF_TEXT || wParam == CF_UNICODETEXT) { + WidgetContentCommandEvent command(true, eContentCommandPaste, this, + true); + DispatchWindowEvent(command); + *aRetValue = (LRESULT)(command.mSucceeded && command.mIsEnabled); + result = true; + } + } break; + + case EM_CANUNDO: { + WidgetContentCommandEvent command(true, eContentCommandUndo, this, true); + DispatchWindowEvent(command); + *aRetValue = (LRESULT)(command.mSucceeded && command.mIsEnabled); + result = true; + } break; + + case EM_CANREDO: { + WidgetContentCommandEvent command(true, eContentCommandRedo, this, true); + DispatchWindowEvent(command); + *aRetValue = (LRESULT)(command.mSucceeded && command.mIsEnabled); + result = true; + } break; + + case MOZ_WM_SKEWFIX: { + TimeStamp skewStamp; + if (CurrentWindowsTimeGetter::GetAndClearBackwardsSkewStamp(wParam, + &skewStamp)) { + TimeConverter().CompensateForBackwardsSkew(::GetMessageTime(), + skewStamp); + } + } break; + + default: { + if (msg == nsAppShell::GetTaskbarButtonCreatedMessage()) { + SetHasTaskbarIconBeenCreated(); + } + } break; + } + + //*aRetValue = result; + if (mWnd) { + return result; + } else { + // Events which caused mWnd destruction and aren't consumed + // will crash during the Windows default processing. + return true; + } +} + +void nsWindow::FinishLiveResizing(ResizeState aNewState) { + if (mResizeState == RESIZING) { + NotifyLiveResizeStopped(); + } + mResizeState = aNewState; + ForcePresent(); +} + +/************************************************************** + * + * SECTION: Broadcast messaging + * + * Broadcast messages to all windows. + * + **************************************************************/ + +// Enumerate all child windows sending aMsg to each of them +BOOL CALLBACK nsWindow::BroadcastMsgToChildren(HWND aWnd, LPARAM aMsg) { + WNDPROC winProc = (WNDPROC)::GetWindowLongPtrW(aWnd, GWLP_WNDPROC); + if (winProc == &nsWindow::WindowProc) { + // it's one of our windows so go ahead and send a message to it + ::CallWindowProcW(winProc, aWnd, aMsg, 0, 0); + } + return TRUE; +} + +// Enumerate all top level windows specifying that the children of each +// top level window should be enumerated. Do *not* send the message to +// each top level window since it is assumed that the toolkit will send +// aMsg to them directly. +BOOL CALLBACK nsWindow::BroadcastMsg(HWND aTopWindow, LPARAM aMsg) { + // Iterate each of aTopWindows child windows sending the aMsg + // to each of them. + ::EnumChildWindows(aTopWindow, nsWindow::BroadcastMsgToChildren, aMsg); + return TRUE; +} + +/************************************************************** + * + * SECTION: Event processing helpers + * + * Special processing for certain event types and + * synthesized events. + * + **************************************************************/ + +LayoutDeviceIntMargin nsWindow::NonClientSizeMargin( + const LayoutDeviceIntMargin& aNonClientOffset) const { + return LayoutDeviceIntMargin(mCaptionHeight - aNonClientOffset.top, + mHorResizeMargin - aNonClientOffset.right, + mVertResizeMargin - aNonClientOffset.bottom, + mHorResizeMargin - aNonClientOffset.left); +} + +int32_t nsWindow::ClientMarginHitTestPoint(int32_t aX, int32_t aY) { + const nsSizeMode sizeMode = mFrameState->GetSizeMode(); + if (sizeMode == nsSizeMode_Minimized || sizeMode == nsSizeMode_Fullscreen) { + return HTCLIENT; + } + + // Calculations are done in screen coords + const LayoutDeviceIntRect winRect = GetScreenBounds(); + const LayoutDeviceIntPoint point(aX, aY); + + // hit return constants: + // HTBORDER - non-resizable border + // HTBOTTOM, HTLEFT, HTRIGHT, HTTOP - resizable border + // HTBOTTOMLEFT, HTBOTTOMRIGHT - resizable corner + // HTTOPLEFT, HTTOPRIGHT - resizable corner + // HTCAPTION - general title bar area + // HTCLIENT - area considered the client + // HTCLOSE - hovering over the close button + // HTMAXBUTTON - maximize button + // HTMINBUTTON - minimize button + + int32_t testResult = HTCLIENT; + const bool isResizable = + sizeMode != nsSizeMode_Maximized && + (mBorderStyle & + (BorderStyle::All | BorderStyle::ResizeH | BorderStyle::Default)); + + LayoutDeviceIntMargin nonClientSizeMargin = NonClientSizeMargin(); + + // Ensure being accessible to borders of window. Even if contents are in + // this area, the area must behave as border. + nonClientSizeMargin.EnsureAtLeast( + LayoutDeviceIntMargin(kResizableBorderMinSize, kResizableBorderMinSize, + kResizableBorderMinSize, kResizableBorderMinSize)); + + LayoutDeviceIntRect clientRect = winRect; + clientRect.Deflate(nonClientSizeMargin); + + const bool allowContentOverride = + sizeMode == nsSizeMode_Maximized || clientRect.Contains(point); + + // The border size. If there is no content under mouse cursor, the border + // size should be larger than the values in system settings. Otherwise, + // contents under the mouse cursor should be able to override the behavior. + // E.g., user must expect that Firefox button always opens the popup menu + // even when the user clicks on the above edge of it. + LayoutDeviceIntMargin borderSize = nonClientSizeMargin; + borderSize.EnsureAtLeast( + LayoutDeviceIntMargin(mVertResizeMargin, mHorResizeMargin, + mVertResizeMargin, mHorResizeMargin)); + + bool top = false; + bool bottom = false; + bool left = false; + bool right = false; + + if (point.y >= winRect.y && point.y < winRect.y + borderSize.top) { + top = true; + } else if (point.y <= winRect.YMost() && + point.y > winRect.YMost() - borderSize.bottom) { + bottom = true; + } + + // (the 2x case here doubles the resize area for corners) + int multiplier = (top || bottom) ? 2 : 1; + if (point.x >= winRect.x && + point.x < winRect.x + (multiplier * borderSize.left)) { + left = true; + } else if (point.x <= winRect.XMost() && + point.x > winRect.XMost() - (multiplier * borderSize.right)) { + right = true; + } + + bool inResizeRegion = false; + if (isResizable) { + if (top) { + testResult = HTTOP; + if (left) { + testResult = HTTOPLEFT; + } else if (right) { + testResult = HTTOPRIGHT; + } + } else if (bottom) { + testResult = HTBOTTOM; + if (left) { + testResult = HTBOTTOMLEFT; + } else if (right) { + testResult = HTBOTTOMRIGHT; + } + } else { + if (left) { + testResult = HTLEFT; + } + if (right) { + testResult = HTRIGHT; + } + } + inResizeRegion = (testResult != HTCLIENT); + } else { + if (top) { + testResult = HTCAPTION; + } else if (bottom || left || right) { + testResult = HTBORDER; + } + } + + if (!sIsInMouseCapture && allowContentOverride) { + { + POINT pt = {aX, aY}; + ::ScreenToClient(mWnd, &pt); + + if (pt.x == mCachedHitTestPoint.x.value && + pt.y == mCachedHitTestPoint.y.value && + TimeStamp::Now() - mCachedHitTestTime < + TimeDuration::FromMilliseconds(HITTEST_CACHE_LIFETIME_MS)) { + return mCachedHitTestResult; + } + + mCachedHitTestPoint = {pt.x, pt.y}; + mCachedHitTestTime = TimeStamp::Now(); + } + + auto pt = mCachedHitTestPoint; + + if (mWindowBtnRect[WindowButtonType::Minimize].Contains(pt)) { + testResult = HTMINBUTTON; + } else if (mWindowBtnRect[WindowButtonType::Maximize].Contains(pt)) { + testResult = HTMAXBUTTON; + } else if (mWindowBtnRect[WindowButtonType::Close].Contains(pt)) { + testResult = HTCLOSE; + } else if (!inResizeRegion) { + // If we're in the resize region, avoid overriding that with either a + // drag or a client result; resize takes priority over either (but not + // over the window controls, which is why we check this after those). + if (mDraggableRegion.Contains(pt)) { + testResult = HTCAPTION; + } else { + testResult = HTCLIENT; + } + } + + mCachedHitTestResult = testResult; + } + + return testResult; +} + +bool nsWindow::IsSimulatedClientArea(int32_t screenX, int32_t screenY) { + int32_t testResult = ClientMarginHitTestPoint(screenX, screenY); + return testResult == HTCAPTION || IsWindowButton(testResult); +} + +bool nsWindow::IsWindowButton(int32_t hitTestResult) { + return hitTestResult == HTMINBUTTON || hitTestResult == HTMAXBUTTON || + hitTestResult == HTCLOSE; +} + +TimeStamp nsWindow::GetMessageTimeStamp(LONG aEventTime) const { + CurrentWindowsTimeGetter getCurrentTime(mWnd); + return TimeConverter().GetTimeStampFromSystemTime(aEventTime, getCurrentTime); +} + +void nsWindow::PostSleepWakeNotification(const bool aIsSleepMode) { + // Retain the previous mode that was notified to observers + static bool sWasSleepMode = false; + + // Only notify observers if mode changed + if (aIsSleepMode == sWasSleepMode) return; + + sWasSleepMode = aIsSleepMode; + + nsCOMPtr<nsIObserverService> observerService = + mozilla::services::GetObserverService(); + if (observerService) + observerService->NotifyObservers(nullptr, + aIsSleepMode + ? NS_WIDGET_SLEEP_OBSERVER_TOPIC + : NS_WIDGET_WAKE_OBSERVER_TOPIC, + nullptr); +} + +LRESULT nsWindow::ProcessCharMessage(const MSG& aMsg, bool* aEventDispatched) { + if (IMEHandler::IsComposingOn(this)) { + IMEHandler::NotifyIME(this, REQUEST_TO_COMMIT_COMPOSITION); + } + // These must be checked here too as a lone WM_CHAR could be received + // if a child window didn't handle it (for example Alt+Space in a content + // window) + ModifierKeyState modKeyState; + NativeKey nativeKey(this, aMsg, modKeyState); + return static_cast<LRESULT>(nativeKey.HandleCharMessage(aEventDispatched)); +} + +LRESULT nsWindow::ProcessKeyUpMessage(const MSG& aMsg, bool* aEventDispatched) { + ModifierKeyState modKeyState; + NativeKey nativeKey(this, aMsg, modKeyState); + bool result = nativeKey.HandleKeyUpMessage(aEventDispatched); + if (aMsg.wParam == VK_F10) { + // Bug 1382199: Windows default behavior will trigger the System menu bar + // when F10 is released. Among other things, this causes the System menu bar + // to appear when a web page overrides the contextmenu event. We *never* + // want this default behavior, so eat this key (never pass it to Windows). + return true; + } + return result; +} + +LRESULT nsWindow::ProcessKeyDownMessage(const MSG& aMsg, + bool* aEventDispatched) { + // If this method doesn't call NativeKey::HandleKeyDownMessage(), this method + // must clean up the redirected message information itself. For more + // information, see above comment of + // RedirectedKeyDownMessageManager::AutoFlusher class definition in + // KeyboardLayout.h. + RedirectedKeyDownMessageManager::AutoFlusher redirectedMsgFlusher(this, aMsg); + + ModifierKeyState modKeyState; + + NativeKey nativeKey(this, aMsg, modKeyState); + LRESULT result = + static_cast<LRESULT>(nativeKey.HandleKeyDownMessage(aEventDispatched)); + // HandleKeyDownMessage cleaned up the redirected message information + // itself, so, we should do nothing. + redirectedMsgFlusher.Cancel(); + + if (aMsg.wParam == VK_MENU || + (aMsg.wParam == VK_F10 && !modKeyState.IsShift())) { + // We need to let Windows handle this keypress, + // by returning false, if there's a native menu + // bar somewhere in our containing window hierarchy. + // Otherwise we handle the keypress and don't pass + // it on to Windows, by returning true. + bool hasNativeMenu = false; + HWND hWnd = mWnd; + while (hWnd) { + if (::GetMenu(hWnd)) { + hasNativeMenu = true; + break; + } + hWnd = ::GetParent(hWnd); + } + result = !hasNativeMenu; + } + + return result; +} + +nsresult nsWindow::SynthesizeNativeKeyEvent( + int32_t aNativeKeyboardLayout, int32_t aNativeKeyCode, + uint32_t aModifierFlags, const nsAString& aCharacters, + const nsAString& aUnmodifiedCharacters, nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "keyevent"); + + KeyboardLayout* keyboardLayout = KeyboardLayout::GetInstance(); + return keyboardLayout->SynthesizeNativeKeyEvent( + this, aNativeKeyboardLayout, aNativeKeyCode, aModifierFlags, aCharacters, + aUnmodifiedCharacters); +} + +nsresult nsWindow::SynthesizeNativeMouseEvent( + LayoutDeviceIntPoint aPoint, NativeMouseMessage aNativeMessage, + MouseButton aButton, nsIWidget::Modifiers aModifierFlags, + nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "mouseevent"); + + INPUT input; + memset(&input, 0, sizeof(input)); + + // TODO (bug 1693240): + // Now, we synthesize native mouse events asynchronously since we want to + // synthesize the event on the front window at the point. However, Windows + // does not provide a way to set modifier only while a mouse message is + // being handled, and MOUSEEVENTF_MOVE may be coalesced by Windows. So, we + // need a trick for handling it. + + switch (aNativeMessage) { + case NativeMouseMessage::Move: + input.mi.dwFlags = MOUSEEVENTF_MOVE; + // Reset sLastMouseMovePoint so that even if we're moving the mouse + // to the position it's already at, we still dispatch a mousemove + // event, because the callers of this function expect that. + sLastMouseMovePoint = {0}; + break; + case NativeMouseMessage::ButtonDown: + case NativeMouseMessage::ButtonUp: { + const bool isDown = aNativeMessage == NativeMouseMessage::ButtonDown; + switch (aButton) { + case MouseButton::ePrimary: + input.mi.dwFlags = isDown ? MOUSEEVENTF_LEFTDOWN : MOUSEEVENTF_LEFTUP; + break; + case MouseButton::eMiddle: + input.mi.dwFlags = + isDown ? MOUSEEVENTF_MIDDLEDOWN : MOUSEEVENTF_MIDDLEUP; + break; + case MouseButton::eSecondary: + input.mi.dwFlags = + isDown ? MOUSEEVENTF_RIGHTDOWN : MOUSEEVENTF_RIGHTUP; + break; + case MouseButton::eX1: + input.mi.dwFlags = isDown ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP; + input.mi.mouseData = XBUTTON1; + break; + case MouseButton::eX2: + input.mi.dwFlags = isDown ? MOUSEEVENTF_XDOWN : MOUSEEVENTF_XUP; + input.mi.mouseData = XBUTTON2; + break; + default: + return NS_ERROR_INVALID_ARG; + } + break; + } + case NativeMouseMessage::EnterWindow: + case NativeMouseMessage::LeaveWindow: + MOZ_ASSERT_UNREACHABLE("Non supported mouse event on Windows"); + return NS_ERROR_INVALID_ARG; + } + + input.type = INPUT_MOUSE; + ::SetCursorPos(aPoint.x, aPoint.y); + ::SendInput(1, &input, sizeof(INPUT)); + + return NS_OK; +} + +nsresult nsWindow::SynthesizeNativeMouseScrollEvent( + LayoutDeviceIntPoint aPoint, uint32_t aNativeMessage, double aDeltaX, + double aDeltaY, double aDeltaZ, uint32_t aModifierFlags, + uint32_t aAdditionalFlags, nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "mousescrollevent"); + return MouseScrollHandler::SynthesizeNativeMouseScrollEvent( + this, aPoint, aNativeMessage, + (aNativeMessage == WM_MOUSEWHEEL || aNativeMessage == WM_VSCROLL) + ? static_cast<int32_t>(aDeltaY) + : static_cast<int32_t>(aDeltaX), + aModifierFlags, aAdditionalFlags); +} + +nsresult nsWindow::SynthesizeNativeTouchpadPan(TouchpadGesturePhase aEventPhase, + LayoutDeviceIntPoint aPoint, + double aDeltaX, double aDeltaY, + int32_t aModifierFlags, + nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "touchpadpanevent"); + DirectManipulationOwner::SynthesizeNativeTouchpadPan( + this, aEventPhase, aPoint, aDeltaX, aDeltaY, aModifierFlags); + return NS_OK; +} + +static void MaybeLogPosChanged(HWND aWnd, WINDOWPOS* wp) { +#ifdef WINSTATE_DEBUG_OUTPUT + if (aWnd == WinUtils::GetTopLevelHWND(aWnd)) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("*** OnWindowPosChanged: [ top] ")); + } else { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("*** OnWindowPosChanged: [child] ")); + } + MOZ_LOG(gWindowsLog, LogLevel::Info, ("WINDOWPOS flags:")); + if (wp->flags & SWP_FRAMECHANGED) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_FRAMECHANGED ")); + } + if (wp->flags & SWP_SHOWWINDOW) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_SHOWWINDOW ")); + } + if (wp->flags & SWP_NOSIZE) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_NOSIZE ")); + } + if (wp->flags & SWP_HIDEWINDOW) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_HIDEWINDOW ")); + } + if (wp->flags & SWP_NOZORDER) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_NOZORDER ")); + } + if (wp->flags & SWP_NOACTIVATE) { + MOZ_LOG(gWindowsLog, LogLevel::Info, ("SWP_NOACTIVATE ")); + } + MOZ_LOG(gWindowsLog, LogLevel::Info, ("\n")); +#endif +} + +/************************************************************** + * + * SECTION: OnXXX message handlers + * + * For message handlers that need to be broken out or + * implemented in specific platform code. + * + **************************************************************/ + +void nsWindow::OnWindowPosChanged(WINDOWPOS* wp) { + if (!wp) { + return; + } + + MaybeLogPosChanged(mWnd, wp); + + // Handle window size mode changes + if (wp->flags & SWP_FRAMECHANGED) { + // Bug 566135 - Windows theme code calls show window on SW_SHOWMINIMIZED + // windows when fullscreen games disable desktop composition. If we're + // minimized and not being activated, ignore the event and let windows + // handle it. + if (mFrameState->GetSizeMode() == nsSizeMode_Minimized && + (wp->flags & SWP_NOACTIVATE)) { + return; + } + + mFrameState->OnFrameChanged(); + + if (mFrameState->GetSizeMode() == nsSizeMode_Minimized) { + // Skip window size change events below on minimization. + return; + } + } + + // Notify visibility change when window is activated. + if (!(wp->flags & SWP_NOACTIVATE) && NeedsToTrackWindowOcclusionState()) { + WinWindowOcclusionTracker::Get()->OnWindowVisibilityChanged( + this, mFrameState->GetSizeMode() != nsSizeMode_Minimized); + } + + // Handle window position changes + if (!(wp->flags & SWP_NOMOVE)) { + mBounds.MoveTo(wp->x, wp->y); + NotifyWindowMoved(wp->x, wp->y); + } + + // Handle window size changes + if (!(wp->flags & SWP_NOSIZE)) { + RECT r; + int32_t newWidth, newHeight; + + ::GetWindowRect(mWnd, &r); + + newWidth = r.right - r.left; + newHeight = r.bottom - r.top; + + if (newWidth > mLastSize.width) { + RECT drect; + + // getting wider + drect.left = wp->x + mLastSize.width; + drect.top = wp->y; + drect.right = drect.left + (newWidth - mLastSize.width); + drect.bottom = drect.top + newHeight; + + ::RedrawWindow(mWnd, &drect, nullptr, + RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | + RDW_ERASENOW | RDW_ALLCHILDREN); + } + if (newHeight > mLastSize.height) { + RECT drect; + + // getting taller + drect.left = wp->x; + drect.top = wp->y + mLastSize.height; + drect.right = drect.left + newWidth; + drect.bottom = drect.top + (newHeight - mLastSize.height); + + ::RedrawWindow(mWnd, &drect, nullptr, + RDW_INVALIDATE | RDW_NOERASE | RDW_NOINTERNALPAINT | + RDW_ERASENOW | RDW_ALLCHILDREN); + } + + mBounds.SizeTo(newWidth, newHeight); + mLastSize.width = newWidth; + mLastSize.height = newHeight; + +#ifdef WINSTATE_DEBUG_OUTPUT + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("*** Resize window: %d x %d x %d x %d\n", wp->x, wp->y, newWidth, + newHeight)); +#endif + + if (mAspectRatio > 0) { + // It's possible (via Windows Aero Snap) that the size of the window + // has changed such that it violates the aspect ratio constraint. If so, + // queue up an event to enforce the aspect ratio constraint and repaint. + // When resized with Windows Aero Snap, we are in the NOT_RESIZING state. + float newAspectRatio = (float)newWidth / newHeight; + if (mResizeState == NOT_RESIZING && mAspectRatio != newAspectRatio) { + // Hold a reference to self alive and pass it into the lambda to make + // sure this nsIWidget stays alive long enough to run this function. + nsCOMPtr<nsIWidget> self(this); + NS_DispatchToMainThread(NS_NewRunnableFunction( + "EnforceAspectRatio", [self, this, newWidth]() -> void { + if (mWnd) { + Resize(newWidth, newWidth / mAspectRatio, true); + } + })); + } + } + + // If a maximized window is resized, recalculate the non-client margins. + if (mFrameState->GetSizeMode() == nsSizeMode_Maximized) { + if (UpdateNonClientMargins(true)) { + // gecko resize event already sent by UpdateNonClientMargins. + return; + } + } + } + + // Notify the widget listener for size change of client area for gecko + // events. This needs to be done when either window size is changed, + // or window frame is changed. They may not happen together. + // However, we don't invoke that for popup when window frame changes, + // because popups may trigger frame change before size change via + // {Set,Clear}ThemeRegion they invoke in Resize. That would make the + // code below call OnResize with a wrong client size first, which can + // lead to flickerling for some popups. + if (!(wp->flags & SWP_NOSIZE) || + ((wp->flags & SWP_FRAMECHANGED) && !IsPopup())) { + RECT r; + LayoutDeviceIntSize clientSize; + if (::GetClientRect(mWnd, &r)) { + clientSize = WinUtils::ToIntRect(r).Size(); + } else { + clientSize = mBounds.Size(); + } + // Send a gecko resize event + OnResize(clientSize); + } +} + +void nsWindow::OnWindowPosChanging(WINDOWPOS* info) { + // Update non-client margins if the frame size is changing, and let the + // browser know we are changing size modes, so alternative css can kick in. + // If we're going into fullscreen mode, ignore this, since it'll reset + // margins to normal mode. + if (info->flags & SWP_FRAMECHANGED && !(info->flags & SWP_NOSIZE)) { + mFrameState->OnFrameChanging(); + } + + // Force fullscreen. This works around a bug in Windows 10 1809 where + // using fullscreen when a window is "snapped" causes a spurious resize + // smaller than the full screen, see bug 1482920. + if (mFrameState->GetSizeMode() == nsSizeMode_Fullscreen && + !(info->flags & SWP_NOMOVE) && !(info->flags & SWP_NOSIZE)) { + nsCOMPtr<nsIScreenManager> screenmgr = + do_GetService(sScreenManagerContractID); + if (screenmgr) { + LayoutDeviceIntRect bounds(info->x, info->y, info->cx, info->cy); + DesktopIntRect deskBounds = + RoundedToInt(bounds / GetDesktopToDeviceScale()); + nsCOMPtr<nsIScreen> screen; + screenmgr->ScreenForRect(deskBounds.X(), deskBounds.Y(), + deskBounds.Width(), deskBounds.Height(), + getter_AddRefs(screen)); + + if (screen) { + auto rect = screen->GetRect(); + info->x = rect.x; + info->y = rect.y; + info->cx = rect.width; + info->cy = rect.height; + } + } + } + + // enforce local z-order rules + if (!(info->flags & SWP_NOZORDER)) { + HWND hwndAfter = info->hwndInsertAfter; + + nsWindow* aboveWindow = 0; + nsWindowZ placement; + + if (hwndAfter == HWND_BOTTOM) + placement = nsWindowZBottom; + else if (hwndAfter == HWND_TOP || hwndAfter == HWND_TOPMOST || + hwndAfter == HWND_NOTOPMOST) + placement = nsWindowZTop; + else { + placement = nsWindowZRelative; + aboveWindow = WinUtils::GetNSWindowPtr(hwndAfter); + } + + if (mWidgetListener) { + nsCOMPtr<nsIWidget> actualBelow = nullptr; + if (mWidgetListener->ZLevelChanged(false, &placement, aboveWindow, + getter_AddRefs(actualBelow))) { + if (placement == nsWindowZBottom) + info->hwndInsertAfter = HWND_BOTTOM; + else if (placement == nsWindowZTop) + info->hwndInsertAfter = HWND_TOP; + else { + info->hwndInsertAfter = + (HWND)actualBelow->GetNativeData(NS_NATIVE_WINDOW); + } + } + } + } + // prevent rude external programs from making hidden window visible + if (mWindowType == WindowType::Invisible) info->flags &= ~SWP_SHOWWINDOW; + + // When waking from sleep or switching out of tablet mode, Windows 10 + // Version 1809 will reopen popup windows that should be hidden. Detect + // this case and refuse to show the window. + static bool sDWMUnhidesPopups = IsWin10Sep2018UpdateOrLater(); + if (sDWMUnhidesPopups && (info->flags & SWP_SHOWWINDOW) && + mWindowType == WindowType::Popup && mWidgetListener && + mWidgetListener->ShouldNotBeVisible()) { + info->flags &= ~SWP_SHOWWINDOW; + } +} + +void nsWindow::UserActivity() { + // Check if we have the idle service, if not we try to get it. + if (!mIdleService) { + mIdleService = do_GetService("@mozilla.org/widget/useridleservice;1"); + } + + // Check that we now have the idle service. + if (mIdleService) { + mIdleService->ResetIdleTimeOut(0); + } +} + +// Helper function for TouchDeviceNeedsPanGestureConversion(PTOUCHINPUT, +// uint32_t). +static bool TouchDeviceNeedsPanGestureConversion(HANDLE aSource) { + std::string deviceName; + UINT dataSize = 0; + // The first call just queries how long the name string will be. + GetRawInputDeviceInfoA(aSource, RIDI_DEVICENAME, nullptr, &dataSize); + if (!dataSize || dataSize > 0x10000) { + return false; + } + deviceName.resize(dataSize); + // The second call actually populates the string. + UINT result = GetRawInputDeviceInfoA(aSource, RIDI_DEVICENAME, &deviceName[0], + &dataSize); + if (result == UINT_MAX) { + return false; + } + // The affected device name is "\\?\VIRTUAL_DIGITIZER", but each backslash + // needs to be escaped with another one. + std::string expectedDeviceName = "\\\\?\\VIRTUAL_DIGITIZER"; + // For some reason, the dataSize returned by the first call is double the + // actual length of the device name (as if it were returning the size of a + // wide-character string in bytes) even though we are using the narrow + // version of the API. For the comparison against the expected device name + // to pass, we truncate the buffer to be no longer tha the expected device + // name. + if (deviceName.substr(0, expectedDeviceName.length()) != expectedDeviceName) { + return false; + } + + RID_DEVICE_INFO deviceInfo; + deviceInfo.cbSize = sizeof(deviceInfo); + dataSize = sizeof(deviceInfo); + result = + GetRawInputDeviceInfoA(aSource, RIDI_DEVICEINFO, &deviceInfo, &dataSize); + if (result == UINT_MAX) { + return false; + } + // The device identifiers that we check for here come from bug 1355162 + // comment 1 (see also bug 1511901 comment 35). + return deviceInfo.dwType == RIM_TYPEHID && deviceInfo.hid.dwVendorId == 0 && + deviceInfo.hid.dwProductId == 0 && + deviceInfo.hid.dwVersionNumber == 1 && + deviceInfo.hid.usUsagePage == 13 && deviceInfo.hid.usUsage == 4; +} + +// Determine if the touch device that originated |aOSEvent| needs to have +// touch events representing a two-finger gesture converted to pan +// gesture events. +// We only do this for touch devices with a specific name and identifiers. +static bool TouchDeviceNeedsPanGestureConversion(PTOUCHINPUT aOSEvent, + uint32_t aTouchCount) { + if (!StaticPrefs::apz_windows_check_for_pan_gesture_conversion()) { + return false; + } + if (aTouchCount == 0) { + return false; + } + HANDLE source = aOSEvent[0].hSource; + + // Cache the result of this computation for each touch device. + // Touch devices are identified by the HANDLE stored in the hSource + // field of TOUCHINPUT. + static std::map<HANDLE, bool> sResultCache; + auto [iter, inserted] = sResultCache.emplace(source, false); + if (inserted) { + iter->second = TouchDeviceNeedsPanGestureConversion(source); + } + return iter->second; +} + +Maybe<PanGestureInput> nsWindow::ConvertTouchToPanGesture( + const MultiTouchInput& aTouchInput, PTOUCHINPUT aOSEvent) { + // Checks if the touch device that originated the touch event is one + // for which we want to convert the touch events to pang gesture events. + bool shouldConvert = TouchDeviceNeedsPanGestureConversion( + aOSEvent, aTouchInput.mTouches.Length()); + if (!shouldConvert) { + return Nothing(); + } + + // Only two-finger gestures need conversion. + if (aTouchInput.mTouches.Length() != 2) { + return Nothing(); + } + + PanGestureInput::PanGestureType eventType = PanGestureInput::PANGESTURE_PAN; + if (aTouchInput.mType == MultiTouchInput::MULTITOUCH_START) { + eventType = PanGestureInput::PANGESTURE_START; + } else if (aTouchInput.mType == MultiTouchInput::MULTITOUCH_END) { + eventType = PanGestureInput::PANGESTURE_END; + } else if (aTouchInput.mType == MultiTouchInput::MULTITOUCH_CANCEL) { + eventType = PanGestureInput::PANGESTURE_CANCELLED; + } + + // Use the midpoint of the two touches as the start point of the pan gesture. + ScreenPoint focusPoint = (aTouchInput.mTouches[0].mScreenPoint + + aTouchInput.mTouches[1].mScreenPoint) / + 2; + // To compute the displacement of the pan gesture, we keep track of the + // location of the previous event. + ScreenPoint displacement = (eventType == PanGestureInput::PANGESTURE_START) + ? ScreenPoint(0, 0) + : (focusPoint - mLastPanGestureFocus); + mLastPanGestureFocus = focusPoint; + + // We need to negate the displacement because for a touch event, moving the + // fingers down results in scrolling up, but for a touchpad gesture, we want + // moving the fingers down to result in scrolling down. + PanGestureInput result(eventType, aTouchInput.mTimeStamp, focusPoint, + -displacement, aTouchInput.modifiers); + result.mSimulateMomentum = true; + + return Some(result); +} + +// Dispatch an event that originated as an OS touch event. +// Usually, we want to dispatch it as a touch event, but some touchpads +// produce touch events for two-finger scrolling, which need to be converted +// to pan gesture events for correct behaviour. +void nsWindow::DispatchTouchOrPanGestureInput(MultiTouchInput& aTouchInput, + PTOUCHINPUT aOSEvent) { + if (Maybe<PanGestureInput> panInput = + ConvertTouchToPanGesture(aTouchInput, aOSEvent)) { + DispatchPanGestureInput(*panInput); + return; + } + + DispatchTouchInput(aTouchInput); +} + +bool nsWindow::OnTouch(WPARAM wParam, LPARAM lParam) { + uint32_t cInputs = LOWORD(wParam); + PTOUCHINPUT pInputs = new TOUCHINPUT[cInputs]; + + if (GetTouchInputInfo((HTOUCHINPUT)lParam, cInputs, pInputs, + sizeof(TOUCHINPUT))) { + MultiTouchInput touchInput, touchEndInput; + + // Walk across the touch point array processing each contact point. + for (uint32_t i = 0; i < cInputs; i++) { + bool addToEvent = false, addToEndEvent = false; + + // N.B.: According with MS documentation + // https://msdn.microsoft.com/en-us/library/windows/desktop/dd317334(v=vs.85).aspx + // TOUCHEVENTF_DOWN cannot be combined with TOUCHEVENTF_MOVE or + // TOUCHEVENTF_UP. Possibly, it means that TOUCHEVENTF_MOVE and + // TOUCHEVENTF_UP can be combined together. + + if (pInputs[i].dwFlags & (TOUCHEVENTF_DOWN | TOUCHEVENTF_MOVE)) { + if (touchInput.mTimeStamp.IsNull()) { + // Initialize a touch event to send. + touchInput.mType = MultiTouchInput::MULTITOUCH_MOVE; + touchInput.mTimeStamp = GetMessageTimeStamp(::GetMessageTime()); + ModifierKeyState modifierKeyState; + touchInput.modifiers = modifierKeyState.GetModifiers(); + } + // Pres shell expects this event to be a eTouchStart + // if any new contact points have been added since the last event sent. + if (pInputs[i].dwFlags & TOUCHEVENTF_DOWN) { + touchInput.mType = MultiTouchInput::MULTITOUCH_START; + } + addToEvent = true; + } + if (pInputs[i].dwFlags & TOUCHEVENTF_UP) { + // Pres shell expects removed contacts points to be delivered in a + // separate eTouchEnd event containing only the contact points that were + // removed. + if (touchEndInput.mTimeStamp.IsNull()) { + // Initialize a touch event to send. + touchEndInput.mType = MultiTouchInput::MULTITOUCH_END; + touchEndInput.mTimeStamp = GetMessageTimeStamp(::GetMessageTime()); + ModifierKeyState modifierKeyState; + touchEndInput.modifiers = modifierKeyState.GetModifiers(); + } + addToEndEvent = true; + } + if (!addToEvent && !addToEndEvent) { + // Filter out spurious Windows events we don't understand, like palm + // contact. + continue; + } + + // Setup the touch point we'll append to the touch event array. + nsPointWin touchPoint; + touchPoint.x = TOUCH_COORD_TO_PIXEL(pInputs[i].x); + touchPoint.y = TOUCH_COORD_TO_PIXEL(pInputs[i].y); + touchPoint.ScreenToClient(mWnd); + + // Initialize the touch data. + SingleTouchData touchData( + pInputs[i].dwID, // aIdentifier + ScreenIntPoint::FromUnknownPoint(touchPoint), // aScreenPoint + // The contact area info cannot be trusted even when + // TOUCHINPUTMASKF_CONTACTAREA is set when the input source is pen, + // which somehow violates the API docs. (bug 1710509) Ultimately the + // dwFlags check will become redundant since we want to migrate to + // WM_POINTER for pens. (bug 1707075) + (pInputs[i].dwMask & TOUCHINPUTMASKF_CONTACTAREA) && + !(pInputs[i].dwFlags & TOUCHEVENTF_PEN) + ? ScreenSize(TOUCH_COORD_TO_PIXEL(pInputs[i].cxContact) / 2, + TOUCH_COORD_TO_PIXEL(pInputs[i].cyContact) / 2) + : ScreenSize(1, 1), // aRadius + 0.0f, // aRotationAngle + 0.0f); // aForce + + // Append touch data to the appropriate event. + if (addToEvent) { + touchInput.mTouches.AppendElement(touchData); + } + if (addToEndEvent) { + touchEndInput.mTouches.AppendElement(touchData); + } + } + + // Dispatch touch start and touch move event if we have one. + if (!touchInput.mTimeStamp.IsNull()) { + DispatchTouchOrPanGestureInput(touchInput, pInputs); + } + // Dispatch touch end event if we have one. + if (!touchEndInput.mTimeStamp.IsNull()) { + DispatchTouchOrPanGestureInput(touchEndInput, pInputs); + } + } + + delete[] pInputs; + CloseTouchInputHandle((HTOUCHINPUT)lParam); + return true; +} + +// Gesture event processing. Handles WM_GESTURE events. +bool nsWindow::OnGesture(WPARAM wParam, LPARAM lParam) { + // Treatment for pan events which translate into scroll events: + if (mGesture.IsPanEvent(lParam)) { + if (!mGesture.ProcessPanMessage(mWnd, wParam, lParam)) + return false; // ignore + + nsEventStatus status; + + WidgetWheelEvent wheelEvent(true, eWheel, this); + + ModifierKeyState modifierKeyState; + modifierKeyState.InitInputEvent(wheelEvent); + + wheelEvent.mButton = 0; + wheelEvent.mTimeStamp = GetMessageTimeStamp(::GetMessageTime()); + wheelEvent.mInputSource = MouseEvent_Binding::MOZ_SOURCE_TOUCH; + + bool endFeedback = true; + + if (mGesture.PanDeltaToPixelScroll(wheelEvent)) { + DispatchEvent(&wheelEvent, status); + } + + if (mDisplayPanFeedback) { + mGesture.UpdatePanFeedbackX( + mWnd, DeprecatedAbs(RoundDown(wheelEvent.mOverflowDeltaX)), + endFeedback); + mGesture.UpdatePanFeedbackY( + mWnd, DeprecatedAbs(RoundDown(wheelEvent.mOverflowDeltaY)), + endFeedback); + mGesture.PanFeedbackFinalize(mWnd, endFeedback); + } + + CloseGestureInfoHandle((HGESTUREINFO)lParam); + + return true; + } + + // Other gestures translate into simple gesture events: + WidgetSimpleGestureEvent event(true, eVoidEvent, this); + if (!mGesture.ProcessGestureMessage(mWnd, wParam, lParam, event)) { + return false; // fall through to DefWndProc + } + + // Polish up and send off the new event + ModifierKeyState modifierKeyState; + modifierKeyState.InitInputEvent(event); + event.mButton = 0; + event.mTimeStamp = GetMessageTimeStamp(::GetMessageTime()); + event.mInputSource = MouseEvent_Binding::MOZ_SOURCE_TOUCH; + + nsEventStatus status; + DispatchEvent(&event, status); + if (status == nsEventStatus_eIgnore) { + return false; // Ignored, fall through + } + + // Only close this if we process and return true. + CloseGestureInfoHandle((HGESTUREINFO)lParam); + + return true; // Handled +} + +// WM_DESTROY event handler +void nsWindow::OnDestroy() { + mOnDestroyCalled = true; + + // If this is a toplevel window, notify the taskbar concealer to clean up any + // relevant state. + if (!mParent) { + TaskbarConcealer::OnWindowDestroyed(mWnd); + } + + // Make sure we don't get destroyed in the process of tearing down. + nsCOMPtr<nsIWidget> kungFuDeathGrip(this); + + // Dispatch the destroy notification. + if (!mInDtor) NotifyWindowDestroyed(); + + // Prevent the widget from sending additional events. + mWidgetListener = nullptr; + mAttachedWidgetListener = nullptr; + + DestroyDirectManipulation(); + + if (mWnd == mLastKillFocusWindow) { + mLastKillFocusWindow = nullptr; + } + // Unregister notifications from terminal services + ::WTSUnRegisterSessionNotification(mWnd); + + // We will stop receiving native events after dissociating from our native + // window. We will also disappear from the output of WinUtils::GetNSWindowPtr + // for that window. + DissociateFromNativeWindow(); + + // Once mWidgetListener is cleared and the subclass is reset, sCurrentWindow + // can be cleared. (It's used in tracking windows for mouse events.) + if (sCurrentWindow == this) sCurrentWindow = nullptr; + + // Disconnects us from our parent, will call our GetParent(). + nsBaseWidget::Destroy(); + + // Release references to children, device context, toolkit, and app shell. + nsBaseWidget::OnDestroy(); + + // Clear our native parent handle. + // XXX Windows will take care of this in the proper order, and + // SetParent(nullptr)'s remove child on the parent already took place in + // nsBaseWidget's Destroy call above. + // SetParent(nullptr); + mParent = nullptr; + + // We have to destroy the native drag target before we null out our window + // pointer. + EnableDragDrop(false); + + // If we're going away and for some reason we're still the rollup widget, + // rollup and turn off capture. + nsIRollupListener* rollupListener = nsBaseWidget::GetActiveRollupListener(); + nsCOMPtr<nsIWidget> rollupWidget; + if (rollupListener) { + rollupWidget = rollupListener->GetRollupWidget(); + } + if (this == rollupWidget) { + rollupListener->Rollup({}); + CaptureRollupEvents(false); + } + + IMEHandler::OnDestroyWindow(this); + + // Free GDI window class objects + if (mBrush) { + VERIFY(::DeleteObject(mBrush)); + mBrush = nullptr; + } + + // Destroy any custom cursor resources. + if (mCursor.IsCustom()) { + SetCursor(Cursor{eCursor_standard}); + } + + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->OnDestroyWindow(); + } + mBasicLayersSurface = nullptr; + + // Finalize panning feedback to possibly restore window displacement + mGesture.PanFeedbackFinalize(mWnd, true); + + // Clear the main HWND. + mWnd = nullptr; +} + +// Send a resize message to the listener +bool nsWindow::OnResize(const LayoutDeviceIntSize& aSize) { + if (mCompositorWidgetDelegate && + !mCompositorWidgetDelegate->OnWindowResize(aSize)) { + return false; + } + + bool result = false; + if (mWidgetListener) { + result = mWidgetListener->WindowResized(this, aSize.width, aSize.height); + } + + // If there is an attached view, inform it as well as the normal widget + // listener. + if (mAttachedWidgetListener) { + return mAttachedWidgetListener->WindowResized(this, aSize.width, + aSize.height); + } + + return result; +} + +void nsWindow::OnSizeModeChange() { + const nsSizeMode mode = mFrameState->GetSizeMode(); + + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("nsWindow::OnSizeModeChange() sizeMode %d", mode)); + + if (NeedsToTrackWindowOcclusionState()) { + WinWindowOcclusionTracker::Get()->OnWindowVisibilityChanged( + this, mode != nsSizeMode_Minimized); + + wr::DebugFlags flags{0}; + flags.bits = gfx::gfxVars::WebRenderDebugFlags(); + bool debugEnabled = bool(flags & wr::DebugFlags::WINDOW_VISIBILITY_DBG); + if (debugEnabled && mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->NotifyVisibilityUpdated(mode, + mIsFullyOccluded); + } + } + + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->OnWindowModeChange(mode); + } + + if (mWidgetListener) { + mWidgetListener->SizeModeChanged(mode); + } +} + +bool nsWindow::OnHotKey(WPARAM wParam, LPARAM lParam) { return true; } + +bool nsWindow::IsPopup() { return mWindowType == WindowType::Popup; } + +bool nsWindow::ShouldUseOffMainThreadCompositing() { + if (mWindowType == WindowType::Popup && mPopupType == PopupType::Tooltip) { + return false; + } + + // Content rendering of popup is always done by child window. + // See nsDocumentViewer::ShouldAttachToTopLevel(). + if (mWindowType == WindowType::Popup && !mIsChildWindow) { + MOZ_ASSERT(!mParent); + return false; + } + + return nsBaseWidget::ShouldUseOffMainThreadCompositing(); +} + +void nsWindow::WindowUsesOMTC() { + ULONG_PTR style = ::GetClassLongPtr(mWnd, GCL_STYLE); + if (!style) { + NS_WARNING("Could not get window class style"); + return; + } + style |= CS_HREDRAW | CS_VREDRAW; + DebugOnly<ULONG_PTR> result = ::SetClassLongPtr(mWnd, GCL_STYLE, style); + NS_WARNING_ASSERTION(result, "Could not reset window class style"); +} + +// See bug 603793 +bool nsWindow::HasBogusPopupsDropShadowOnMultiMonitor() { + static const bool sHasBogusPopupsDropShadowOnMultiMonitor = [] { + // Since any change in the preferences requires a restart, this can be + // done just once. + // Check for Direct2D first. + if (gfxWindowsPlatform::GetPlatform()->IsDirect2DBackend()) { + return true; + } + // Otherwise check if Direct3D 9 may be used. + if (gfxConfig::IsEnabled(gfx::Feature::HW_COMPOSITING) && + !gfxConfig::IsEnabled(gfx::Feature::OPENGL_COMPOSITING)) { + nsCOMPtr<nsIGfxInfo> gfxInfo = components::GfxInfo::Service(); + if (gfxInfo) { + int32_t status; + nsCString discardFailureId; + if (NS_SUCCEEDED( + gfxInfo->GetFeatureStatus(nsIGfxInfo::FEATURE_DIRECT3D_9_LAYERS, + discardFailureId, &status))) { + if (status == nsIGfxInfo::FEATURE_STATUS_OK || + gfxConfig::IsForcedOnByUser(gfx::Feature::HW_COMPOSITING)) { + return true; + } + } + } + } + return false; + }(); + return sHasBogusPopupsDropShadowOnMultiMonitor; +} + +void nsWindow::OnDPIChanged(int32_t x, int32_t y, int32_t width, + int32_t height) { + // Don't try to handle WM_DPICHANGED for popup windows (see bug 1239353); + // they remain tied to their original parent's resolution. + if (mWindowType == WindowType::Popup) { + return; + } + if (StaticPrefs::layout_css_devPixelsPerPx() > 0.0) { + return; + } + mDefaultScale = -1.0; // force recomputation of scale factor + + if (mResizeState != RESIZING && + mFrameState->GetSizeMode() == nsSizeMode_Normal) { + // Limit the position (if not in the middle of a drag-move) & size, + // if it would overflow the destination screen + nsCOMPtr<nsIScreenManager> sm = do_GetService(sScreenManagerContractID); + if (sm) { + nsCOMPtr<nsIScreen> screen; + sm->ScreenForRect(x, y, width, height, getter_AddRefs(screen)); + if (screen) { + int32_t availLeft, availTop, availWidth, availHeight; + screen->GetAvailRect(&availLeft, &availTop, &availWidth, &availHeight); + if (mResizeState != MOVING) { + x = std::max(x, availLeft); + y = std::max(y, availTop); + } + width = std::min(width, availWidth); + height = std::min(height, availHeight); + } + } + + Resize(x, y, width, height, true); + } + UpdateNonClientMargins(); + ChangedDPI(); + ResetLayout(); +} + +// Callback to generate OnCloakChanged pseudo-events. +/* static */ +void nsWindow::OnCloakEvent(HWND aWnd, bool aCloaked) { + MOZ_ASSERT(NS_IsMainThread()); + MOZ_ASSERT(IsWin8OrLater()); + + const char* const kEventName = aCloaked ? "CLOAKED" : "UNCLOAKED"; + nsWindow* pWin = WinUtils::GetNSWindowPtr(aWnd); + if (!pWin) { + MOZ_LOG( + sCloakingLog, LogLevel::Debug, + ("Received %s event for HWND %p (not an nsWindow)", kEventName, aWnd)); + return; + } + + const char* const kWasCloakedStr = pWin->mIsCloaked ? "cloaked" : "uncloaked"; + if (mozilla::IsCloaked(aWnd) == pWin->mIsCloaked) { + MOZ_LOG(sCloakingLog, LogLevel::Debug, + ("Received redundant %s event for %s HWND %p; discarding", + kEventName, kWasCloakedStr, aWnd)); + return; + } + + MOZ_LOG( + sCloakingLog, LogLevel::Info, + ("Received %s event for %s HWND %p", kEventName, kWasCloakedStr, aWnd)); + + // Cloaking events like the one we've just received are sent asynchronously. + // Rather than process them one-by-one, we jump the gun a bit and perform + // updates on all newly cloaked/uncloaked nsWindows at once. This also lets us + // batch operations that consider more than one window's state. + struct Item { + nsWindow* win; + bool nowCloaked; + }; + nsTArray<Item> changedWindows; + + mozilla::EnumerateThreadWindows([&](HWND hwnd) { + nsWindow* pWin = WinUtils::GetNSWindowPtr(hwnd); + if (!pWin) { + return; + } + + const bool isCloaked = mozilla::IsCloaked(hwnd); + if (isCloaked != pWin->mIsCloaked) { + changedWindows.AppendElement(Item{pWin, isCloaked}); + } + }); + + if (changedWindows.IsEmpty()) { + return; + } + + for (const Item& item : changedWindows) { + item.win->OnCloakChanged(item.nowCloaked); + } + + nsWindow::TaskbarConcealer::OnCloakChanged(); +} + +void nsWindow::OnCloakChanged(bool aCloaked) { + MOZ_LOG(sCloakingLog, LogLevel::Info, + ("Calling OnCloakChanged(): HWND %p, aCloaked %s", mWnd, + aCloaked ? "true" : "false")); + mIsCloaked = aCloaked; +} + +/************************************************************** + ************************************************************** + ** + ** BLOCK: IME management and accessibility + ** + ** Handles managing IME input and accessibility. + ** + ************************************************************** + **************************************************************/ + +void nsWindow::SetInputContext(const InputContext& aContext, + const InputContextAction& aAction) { + InputContext newInputContext = aContext; + IMEHandler::SetInputContext(this, newInputContext, aAction); + mInputContext = newInputContext; +} + +InputContext nsWindow::GetInputContext() { + mInputContext.mIMEState.mOpen = IMEState::CLOSED; + if (WinUtils::IsIMEEnabled(mInputContext) && IMEHandler::GetOpenState(this)) { + mInputContext.mIMEState.mOpen = IMEState::OPEN; + } else { + mInputContext.mIMEState.mOpen = IMEState::CLOSED; + } + return mInputContext; +} + +TextEventDispatcherListener* nsWindow::GetNativeTextEventDispatcherListener() { + return IMEHandler::GetNativeTextEventDispatcherListener(); +} + +#ifdef ACCESSIBILITY +# ifdef DEBUG +# define NS_LOG_WMGETOBJECT(aWnd, aHwnd, aAcc) \ + if (a11y::logging::IsEnabled(a11y::logging::ePlatforms)) { \ + printf( \ + "Get the window:\n {\n HWND: %p, parent HWND: %p, wndobj: " \ + "%p,\n", \ + aHwnd, ::GetParent(aHwnd), aWnd); \ + printf(" acc: %p", aAcc); \ + if (aAcc) { \ + nsAutoString name; \ + aAcc->Name(name); \ + printf(", accname: %s", NS_ConvertUTF16toUTF8(name).get()); \ + } \ + printf("\n }\n"); \ + } + +# else +# define NS_LOG_WMGETOBJECT(aWnd, aHwnd, aAcc) +# endif + +a11y::LocalAccessible* nsWindow::GetAccessible() { + // If the pref was ePlatformIsDisabled, return null here, disabling a11y. + if (a11y::PlatformDisabledState() == a11y::ePlatformIsDisabled) + return nullptr; + + if (mInDtor || mOnDestroyCalled || mWindowType == WindowType::Invisible) { + return nullptr; + } + + // In case of popup window return a popup accessible. + nsView* view = nsView::GetViewFor(this); + if (view) { + nsIFrame* frame = view->GetFrame(); + if (frame && nsLayoutUtils::IsPopup(frame)) { + nsAccessibilityService* accService = GetOrCreateAccService(); + if (accService) { + a11y::DocAccessible* docAcc = + GetAccService()->GetDocAccessible(frame->PresShell()); + if (docAcc) { + NS_LOG_WMGETOBJECT( + this, mWnd, + docAcc->GetAccessibleOrDescendant(frame->GetContent())); + return docAcc->GetAccessibleOrDescendant(frame->GetContent()); + } + } + } + } + + // otherwise root document accessible. + NS_LOG_WMGETOBJECT(this, mWnd, GetRootAccessible()); + return GetRootAccessible(); +} +#endif + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Transparency + ** + ** Window transparency helpers. + ** + ************************************************************** + **************************************************************/ + +void nsWindow::SetWindowTranslucencyInner(TransparencyMode aMode) { + if (aMode == mTransparencyMode) return; + + // stop on dialogs and popups! + HWND hWnd = WinUtils::GetTopLevelHWND(mWnd, true); + nsWindow* parent = WinUtils::GetNSWindowPtr(hWnd); + + if (!parent) { + NS_WARNING("Trying to use transparent chrome in an embedded context"); + return; + } + + if (parent != this) { + NS_WARNING( + "Setting SetWindowTranslucencyInner on a parent this is not us!"); + } + + if (aMode == TransparencyMode::Transparent) { + // If we're switching to the use of a transparent window, hide the chrome + // on our parent. + HideWindowChrome(true); + } else if (mHideChrome && + mTransparencyMode == TransparencyMode::Transparent) { + // if we're switching out of transparent, re-enable our parent's chrome. + HideWindowChrome(false); + } + + LONG_PTR style = ::GetWindowLongPtrW(hWnd, GWL_STYLE), + exStyle = ::GetWindowLongPtr(hWnd, GWL_EXSTYLE); + + if (parent->mIsVisible) { + style |= WS_VISIBLE; + if (parent->mFrameState->GetSizeMode() == nsSizeMode_Maximized) { + style |= WS_MAXIMIZE; + } else if (parent->mFrameState->GetSizeMode() == nsSizeMode_Minimized) { + style |= WS_MINIMIZE; + } + } + + if (aMode == TransparencyMode::Transparent) + exStyle |= WS_EX_LAYERED; + else + exStyle &= ~WS_EX_LAYERED; + + VERIFY_WINDOW_STYLE(style); + ::SetWindowLongPtrW(hWnd, GWL_STYLE, style); + ::SetWindowLongPtrW(hWnd, GWL_EXSTYLE, exStyle); + + if (HasGlass()) memset(&mGlassMargins, 0, sizeof mGlassMargins); + mTransparencyMode = aMode; + + if (mCompositorWidgetDelegate) { + mCompositorWidgetDelegate->UpdateTransparency(aMode); + } + UpdateGlass(); + + // Clear window by transparent black when compositor window is used in GPU + // process and non-client area rendering by DWM is enabled. + // It is for showing non-client area rendering. See nsWindow::UpdateGlass(). + if (HasGlass() && GetWindowRenderer()->AsKnowsCompositor() && + GetWindowRenderer()->AsKnowsCompositor()->GetUseCompositorWnd()) { + HDC hdc; + RECT rect; + hdc = ::GetWindowDC(mWnd); + ::GetWindowRect(mWnd, &rect); + ::MapWindowPoints(nullptr, mWnd, (LPPOINT)&rect, 2); + ::FillRect(hdc, &rect, + reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH))); + ReleaseDC(mWnd, hdc); + } +} + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Popup rollup hooks + ** + ** Deals with CaptureRollup on popup windows. + ** + ************************************************************** + **************************************************************/ + +// Schedules a timer for a window, so we can rollup after processing the hook +// event +void nsWindow::ScheduleHookTimer(HWND aWnd, UINT aMsgId) { + // In some cases multiple hooks may be scheduled + // so ignore any other requests once one timer is scheduled + if (sHookTimerId == 0) { + // Remember the window handle and the message ID to be used later + sRollupMsgId = aMsgId; + sRollupMsgWnd = aWnd; + // Schedule native timer for doing the rollup after + // this event is done being processed + sHookTimerId = ::SetTimer(nullptr, 0, 0, (TIMERPROC)HookTimerForPopups); + NS_ASSERTION(sHookTimerId, "Timer couldn't be created."); + } +} + +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT +int gLastMsgCode = 0; +extern MSGFEventMsgInfo gMSGFEvents[]; +#endif + +// Process Menu messages, rollup when popup is clicked. +LRESULT CALLBACK nsWindow::MozSpecialMsgFilter(int code, WPARAM wParam, + LPARAM lParam) { +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT + if (sProcessHook) { + MSG* pMsg = (MSG*)lParam; + + int inx = 0; + while (gMSGFEvents[inx].mId != code && gMSGFEvents[inx].mStr != nullptr) { + inx++; + } + if (code != gLastMsgCode) { + if (gMSGFEvents[inx].mId == code) { +# ifdef DEBUG + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("MozSpecialMessageProc - code: 0x%X - %s hw: %p\n", code, + gMSGFEvents[inx].mStr, pMsg->hwnd)); +# endif + } else { +# ifdef DEBUG + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("MozSpecialMessageProc - code: 0x%X - %d hw: %p\n", code, + gMSGFEvents[inx].mId, pMsg->hwnd)); +# endif + } + gLastMsgCode = code; + } + PrintEvent(pMsg->message, FALSE, FALSE); + } +#endif // #ifdef POPUP_ROLLUP_DEBUG_OUTPUT + + if (sProcessHook && code == MSGF_MENU) { + MSG* pMsg = (MSG*)lParam; + ScheduleHookTimer(pMsg->hwnd, pMsg->message); + } + + return ::CallNextHookEx(sMsgFilterHook, code, wParam, lParam); +} + +// Process all mouse messages. Roll up when a click is in a native window +// that doesn't have an nsIWidget. +LRESULT CALLBACK nsWindow::MozSpecialMouseProc(int code, WPARAM wParam, + LPARAM lParam) { + if (sProcessHook) { + switch (WinUtils::GetNativeMessage(wParam)) { + case WM_LBUTTONDOWN: + case WM_RBUTTONDOWN: + case WM_MBUTTONDOWN: + case WM_MOUSEWHEEL: + case WM_MOUSEHWHEEL: { + MOUSEHOOKSTRUCT* ms = (MOUSEHOOKSTRUCT*)lParam; + nsIWidget* mozWin = WinUtils::GetNSWindowPtr(ms->hwnd); + if (!mozWin) { + ScheduleHookTimer(ms->hwnd, (UINT)wParam); + } + break; + } + } + } + return ::CallNextHookEx(sCallMouseHook, code, wParam, lParam); +} + +// Process all messages. Roll up when the window is moving, or +// is resizing or when maximized or mininized. +LRESULT CALLBACK nsWindow::MozSpecialWndProc(int code, WPARAM wParam, + LPARAM lParam) { +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT + if (sProcessHook) { + CWPSTRUCT* cwpt = (CWPSTRUCT*)lParam; + PrintEvent(cwpt->message, FALSE, FALSE); + } +#endif + + if (sProcessHook) { + CWPSTRUCT* cwpt = (CWPSTRUCT*)lParam; + if (cwpt->message == WM_MOVING || cwpt->message == WM_SIZING || + cwpt->message == WM_GETMINMAXINFO) { + ScheduleHookTimer(cwpt->hwnd, (UINT)cwpt->message); + } + } + + return ::CallNextHookEx(sCallProcHook, code, wParam, lParam); +} + +// Register the special "hooks" for dropdown processing. +void nsWindow::RegisterSpecialDropdownHooks() { + NS_ASSERTION(!sMsgFilterHook, "sMsgFilterHook must be NULL!"); + NS_ASSERTION(!sCallProcHook, "sCallProcHook must be NULL!"); + + DISPLAY_NMM_PRT("***************** Installing Msg Hooks ***************\n"); + + // Install msg hook for moving the window and resizing + if (!sMsgFilterHook) { + DISPLAY_NMM_PRT("***** Hooking sMsgFilterHook!\n"); + sMsgFilterHook = SetWindowsHookEx(WH_MSGFILTER, MozSpecialMsgFilter, + nullptr, GetCurrentThreadId()); +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT + if (!sMsgFilterHook) { + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("***** SetWindowsHookEx is NOT installed for WH_MSGFILTER!\n")); + } +#endif + } + + // Install msg hook for menus + if (!sCallProcHook) { + DISPLAY_NMM_PRT("***** Hooking sCallProcHook!\n"); + sCallProcHook = SetWindowsHookEx(WH_CALLWNDPROC, MozSpecialWndProc, nullptr, + GetCurrentThreadId()); +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT + if (!sCallProcHook) { + MOZ_LOG( + gWindowsLog, LogLevel::Info, + ("***** SetWindowsHookEx is NOT installed for WH_CALLWNDPROC!\n")); + } +#endif + } + + // Install msg hook for the mouse + if (!sCallMouseHook) { + DISPLAY_NMM_PRT("***** Hooking sCallMouseHook!\n"); + sCallMouseHook = SetWindowsHookEx(WH_MOUSE, MozSpecialMouseProc, nullptr, + GetCurrentThreadId()); +#ifdef POPUP_ROLLUP_DEBUG_OUTPUT + if (!sCallMouseHook) { + MOZ_LOG(gWindowsLog, LogLevel::Info, + ("***** SetWindowsHookEx is NOT installed for WH_MOUSE!\n")); + } +#endif + } +} + +// Unhook special message hooks for dropdowns. +void nsWindow::UnregisterSpecialDropdownHooks() { + DISPLAY_NMM_PRT( + "***************** De-installing Msg Hooks ***************\n"); + + if (sCallProcHook) { + DISPLAY_NMM_PRT("***** Unhooking sCallProcHook!\n"); + if (!::UnhookWindowsHookEx(sCallProcHook)) { + DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for sCallProcHook!\n"); + } + sCallProcHook = nullptr; + } + + if (sMsgFilterHook) { + DISPLAY_NMM_PRT("***** Unhooking sMsgFilterHook!\n"); + if (!::UnhookWindowsHookEx(sMsgFilterHook)) { + DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for sMsgFilterHook!\n"); + } + sMsgFilterHook = nullptr; + } + + if (sCallMouseHook) { + DISPLAY_NMM_PRT("***** Unhooking sCallMouseHook!\n"); + if (!::UnhookWindowsHookEx(sCallMouseHook)) { + DISPLAY_NMM_PRT("***** UnhookWindowsHookEx failed for sCallMouseHook!\n"); + } + sCallMouseHook = nullptr; + } +} + +// This timer is designed to only fire one time at most each time a "hook" +// function is used to rollup the dropdown. In some cases, the timer may be +// scheduled from the hook, but that hook event or a subsequent event may roll +// up the dropdown before this timer function is executed. +// +// For example, if an MFC control takes focus, the combobox will lose focus and +// rollup before this function fires. +VOID CALLBACK nsWindow::HookTimerForPopups(HWND hwnd, UINT uMsg, UINT idEvent, + DWORD dwTime) { + if (sHookTimerId != 0) { + // if the window is nullptr then we need to use the ID to kill the timer + DebugOnly<BOOL> status = ::KillTimer(nullptr, sHookTimerId); + NS_ASSERTION(status, "Hook Timer was not killed."); + sHookTimerId = 0; + } + + if (sRollupMsgId != 0) { + // Note: DealWithPopups does the check to make sure that the rollup widget + // is set. + LRESULT popupHandlingResult; + nsAutoRollup autoRollup; + DealWithPopups(sRollupMsgWnd, sRollupMsgId, 0, 0, &popupHandlingResult); + sRollupMsgId = 0; + sRollupMsgWnd = nullptr; + } +} + +static bool IsDifferentThreadWindow(HWND aWnd) { + return ::GetCurrentThreadId() != ::GetWindowThreadProcessId(aWnd, nullptr); +} + +// static +bool nsWindow::EventIsInsideWindow(nsWindow* aWindow, + Maybe<POINT> aEventPoint) { + RECT r; + ::GetWindowRect(aWindow->mWnd, &r); + POINT mp; + if (aEventPoint) { + mp = *aEventPoint; + } else { + DWORD pos = ::GetMessagePos(); + mp.x = GET_X_LPARAM(pos); + mp.y = GET_Y_LPARAM(pos); + } + + auto margin = aWindow->mInputRegion.mMargin; + if (margin > 0) { + r.top += margin; + r.bottom -= margin; + r.left += margin; + r.right -= margin; + } + + // was the event inside this window? + return static_cast<bool>(::PtInRect(&r, mp)); +} + +// static +bool nsWindow::GetPopupsToRollup(nsIRollupListener* aRollupListener, + uint32_t* aPopupsToRollup, + Maybe<POINT> aEventPoint) { + // If we're dealing with menus, we probably have submenus and we don't want + // to rollup some of them if the click is in a parent menu of the current + // submenu. + *aPopupsToRollup = UINT32_MAX; + AutoTArray<nsIWidget*, 5> widgetChain; + uint32_t sameTypeCount = aRollupListener->GetSubmenuWidgetChain(&widgetChain); + for (uint32_t i = 0; i < widgetChain.Length(); ++i) { + nsIWidget* widget = widgetChain[i]; + if (EventIsInsideWindow(static_cast<nsWindow*>(widget), aEventPoint)) { + // Don't roll up if the mouse event occurred within a menu of the + // same type. If the mouse event occurred in a menu higher than that, + // roll up, but pass the number of popups to Rollup so that only those + // of the same type close up. + if (i < sameTypeCount) { + return false; + } + + *aPopupsToRollup = sameTypeCount; + break; + } + } + return true; +} + +// static +bool nsWindow::NeedsToHandleNCActivateDelayed(HWND aWnd) { + // While popup is open, popup window might be activated by other application. + // At this time, we need to take back focus to the previous window but it + // causes flickering its nonclient area because WM_NCACTIVATE comes before + // WM_ACTIVATE and we cannot know which window will take focus at receiving + // WM_NCACTIVATE. Therefore, we need a hack for preventing the flickerling. + // + // If non-popup window receives WM_NCACTIVATE at deactivating, default + // wndproc shouldn't handle it as deactivating. Instead, at receiving + // WM_ACTIVIATE after that, WM_NCACTIVATE should be sent again manually. + // This returns true if the window needs to handle WM_NCACTIVATE later. + + nsWindow* window = WinUtils::GetNSWindowPtr(aWnd); + return window && !window->IsPopup(); +} + +static bool IsTouchSupportEnabled(HWND aWnd) { + nsWindow* topWindow = + WinUtils::GetNSWindowPtr(WinUtils::GetTopLevelHWND(aWnd, true)); + return topWindow ? topWindow->IsTouchWindow() : false; +} + +static Maybe<POINT> GetSingleTouch(WPARAM wParam, LPARAM lParam) { + Maybe<POINT> ret; + uint32_t cInputs = LOWORD(wParam); + if (cInputs != 1) { + return ret; + } + TOUCHINPUT input; + if (GetTouchInputInfo((HTOUCHINPUT)lParam, cInputs, &input, + sizeof(TOUCHINPUT))) { + ret.emplace(); + ret->x = TOUCH_COORD_TO_PIXEL(input.x); + ret->y = TOUCH_COORD_TO_PIXEL(input.y); + } + // Note that we don't call CloseTouchInputHandle here because we need + // to read the touch input info again in OnTouch later. + return ret; +} + +// static +bool nsWindow::DealWithPopups(HWND aWnd, UINT aMessage, WPARAM aWParam, + LPARAM aLParam, LRESULT* aResult) { + NS_ASSERTION(aResult, "Bad outResult"); + + // XXX Why do we use the return value of WM_MOUSEACTIVATE for all messages? + *aResult = MA_NOACTIVATE; + + if (!::IsWindowVisible(aWnd)) { + return false; + } + + if (MOZ_UNLIKELY(aMessage == WM_KILLFOCUS)) { + // NOTE: We deal with this here rather than on the switch below because we + // want to do this even if there are no menus to rollup (tooltips don't set + // the rollup listener etc). + if (RefPtr pm = nsXULPopupManager::GetInstance()) { + pm->RollupTooltips(); + } + } + + nsIRollupListener* rollupListener = nsBaseWidget::GetActiveRollupListener(); + NS_ENSURE_TRUE(rollupListener, false); + + nsCOMPtr<nsIWidget> popup = rollupListener->GetRollupWidget(); + if (!popup) { + return false; + } + + static bool sSendingNCACTIVATE = false; + static bool sPendingNCACTIVATE = false; + uint32_t popupsToRollup = UINT32_MAX; + + bool consumeRollupEvent = false; + Maybe<POINT> touchPoint; // In screen coords. + + // If we rollup with animations but get occluded right away, we might not + // advance the refresh driver enough for the animation to finish. + auto allowAnimations = nsIRollupListener::AllowAnimations::Yes; + nsWindow* popupWindow = static_cast<nsWindow*>(popup.get()); + UINT nativeMessage = WinUtils::GetNativeMessage(aMessage); + switch (nativeMessage) { + case WM_TOUCH: + if (!IsTouchSupportEnabled(aWnd)) { + // If APZ is disabled, don't allow touch inputs to dismiss popups. The + // compatibility mouse events will do it instead. + return false; + } + touchPoint = GetSingleTouch(aWParam, aLParam); + if (!touchPoint) { + return false; + } + [[fallthrough]]; + case WM_LBUTTONDOWN: + case WM_RBUTTONDOWN: + case WM_MBUTTONDOWN: + case WM_NCLBUTTONDOWN: + case WM_NCRBUTTONDOWN: + case WM_NCMBUTTONDOWN: + if (nativeMessage != WM_TOUCH && IsTouchSupportEnabled(aWnd) && + MOUSE_INPUT_SOURCE() == MouseEvent_Binding::MOZ_SOURCE_TOUCH) { + // If any of these mouse events are really compatibility events that + // Windows is sending for touch inputs, then don't allow them to dismiss + // popups when APZ is enabled (instead we do the dismissing as part of + // WM_TOUCH handling which is more correct). + // If we don't do this, then when the user lifts their finger after a + // long-press, the WM_RBUTTONDOWN compatibility event that Windows sends + // us will dismiss the contextmenu popup that we displayed as part of + // handling the long-tap-up. + return false; + } + if (!EventIsInsideWindow(popupWindow, touchPoint) && + GetPopupsToRollup(rollupListener, &popupsToRollup, touchPoint)) { + break; + } + return false; + case WM_POINTERDOWN: { + WinPointerEvents pointerEvents; + if (!pointerEvents.ShouldRollupOnPointerEvent(nativeMessage, aWParam)) { + return false; + } + POINT pt; + pt.x = GET_X_LPARAM(aLParam); + pt.y = GET_Y_LPARAM(aLParam); + if (!GetPopupsToRollup(rollupListener, &popupsToRollup, Some(pt))) { + return false; + } + if (EventIsInsideWindow(popupWindow, Some(pt))) { + // Don't roll up if the event is inside the popup window. + return false; + } + } break; + case MOZ_WM_DMANIP: { + POINT pt; + ::GetCursorPos(&pt); + if (!GetPopupsToRollup(rollupListener, &popupsToRollup, Some(pt))) { + return false; + } + if (EventIsInsideWindow(popupWindow, Some(pt))) { + // Don't roll up if the event is inside the popup window + return false; + } + } break; + case WM_MOUSEWHEEL: + case WM_MOUSEHWHEEL: + // We need to check if the popup thinks that it should cause closing + // itself when mouse wheel events are fired outside the rollup widget. + if (!EventIsInsideWindow(popupWindow)) { + // Check if we should consume this event even if we don't roll-up: + consumeRollupEvent = rollupListener->ShouldConsumeOnMouseWheelEvent(); + *aResult = MA_ACTIVATE; + if (rollupListener->ShouldRollupOnMouseWheelEvent() && + GetPopupsToRollup(rollupListener, &popupsToRollup)) { + break; + } + } + return consumeRollupEvent; + + case WM_ACTIVATEAPP: + allowAnimations = nsIRollupListener::AllowAnimations::No; + break; + + case WM_ACTIVATE: { + WndProcUrgentInvocation::Marker _marker; + + // NOTE: Don't handle WA_INACTIVE for preventing popup taking focus + // because we cannot distinguish it's caused by mouse or not. + if (LOWORD(aWParam) == WA_ACTIVE && aLParam) { + nsWindow* window = WinUtils::GetNSWindowPtr(aWnd); + if (window && window->IsPopup()) { + // Cancel notifying widget listeners of deactivating the previous + // active window (see WM_KILLFOCUS case in ProcessMessage()). + sJustGotDeactivate = false; + // Reactivate the window later. + ::PostMessageW(aWnd, MOZ_WM_REACTIVATE, aWParam, aLParam); + return true; + } + // Don't rollup the popup when focus moves back to the parent window + // from a popup because such case is caused by strange mouse drivers. + nsWindow* prevWindow = + WinUtils::GetNSWindowPtr(reinterpret_cast<HWND>(aLParam)); + if (prevWindow && prevWindow->IsPopup()) { + // Consume this message here since previous window must not have + // been inactivated since we've already stopped accepting the + // inactivation below. + return true; + } + } else if (LOWORD(aWParam) == WA_INACTIVE) { + nsWindow* activeWindow = + WinUtils::GetNSWindowPtr(reinterpret_cast<HWND>(aLParam)); + if (sPendingNCACTIVATE && NeedsToHandleNCActivateDelayed(aWnd)) { + // If focus moves to non-popup widget or focusable popup, the window + // needs to update its nonclient area. + if (!activeWindow || !activeWindow->IsPopup()) { + sSendingNCACTIVATE = true; + ::SendMessageW(aWnd, WM_NCACTIVATE, false, 0); + sSendingNCACTIVATE = false; + } + sPendingNCACTIVATE = false; + } + // If focus moves from/to popup, we don't need to rollup the popup + // because such case is caused by strange mouse drivers. And in + // such case, we should consume the message here since we need to + // hide this odd focus move from our content. (If we didn't consume + // the message here, ProcessMessage() will notify widget listener of + // inactivation and that causes unnecessary reflow for supporting + // -moz-window-inactive pseudo class. + if (activeWindow) { + if (activeWindow->IsPopup()) { + return true; + } + nsWindow* deactiveWindow = WinUtils::GetNSWindowPtr(aWnd); + if (deactiveWindow && deactiveWindow->IsPopup()) { + return true; + } + } + } else if (LOWORD(aWParam) == WA_CLICKACTIVE) { + // If the WM_ACTIVATE message is caused by a click in a popup, + // we should not rollup any popups. + nsWindow* window = WinUtils::GetNSWindowPtr(aWnd); + if ((window && window->IsPopup()) || + !GetPopupsToRollup(rollupListener, &popupsToRollup)) { + return false; + } + } + allowAnimations = nsIRollupListener::AllowAnimations::No; + } break; + + case MOZ_WM_REACTIVATE: + // The previous active window should take back focus. + if (::IsWindow(reinterpret_cast<HWND>(aLParam))) { + // FYI: Even without this API call, you see expected result (e.g., the + // owner window of the popup keeps active without flickering + // the non-client area). And also this causes initializing + // TSF and it causes using CPU time a lot. However, even if we + // consume WM_ACTIVE messages, native focus change has already + // been occurred. I.e., a popup window is active now. Therefore, + // you'll see some odd behavior if we don't reactivate the owner + // window here. For example, if you do: + // 1. Turn wheel on a bookmark panel. + // 2. Turn wheel on another window. + // then, you'll see that the another window becomes active but the + // owner window of the bookmark panel looks still active and the + // bookmark panel keeps open. The reason is that the first wheel + // operation gives focus to the bookmark panel. Therefore, when + // the next operation gives focus to the another window, previous + // focus window is the bookmark panel (i.e., a popup window). + // So, in this case, our hack around here prevents to inactivate + // the owner window and roll up the bookmark panel. + ::SetForegroundWindow(reinterpret_cast<HWND>(aLParam)); + } + return true; + + case WM_NCACTIVATE: + if (!aWParam && !sSendingNCACTIVATE && + NeedsToHandleNCActivateDelayed(aWnd)) { + // Don't just consume WM_NCACTIVATE. It doesn't handle only the + // nonclient area state change. + ::DefWindowProcW(aWnd, aMessage, TRUE, aLParam); + // Accept the deactivating because it's necessary to receive following + // WM_ACTIVATE. + *aResult = TRUE; + sPendingNCACTIVATE = true; + return true; + } + return false; + + case WM_MOUSEACTIVATE: + if (!EventIsInsideWindow(popupWindow) && + GetPopupsToRollup(rollupListener, &popupsToRollup)) { + // WM_MOUSEACTIVATE may be caused by moving the mouse (e.g., X-mouse + // of TweakUI is enabled. Then, check if the popup should be rolled up + // with rollup listener. If not, just consume the message. + if (HIWORD(aLParam) == WM_MOUSEMOVE && + !rollupListener->ShouldRollupOnMouseActivate()) { + return true; + } + // Otherwise, it should be handled by wndproc. + return false; + } + + // Prevent the click inside the popup from causing a change in window + // activation. Since the popup is shown non-activated, we need to eat any + // requests to activate the window while it is displayed. Windows will + // automatically activate the popup on the mousedown otherwise. + return true; + + case WM_SHOWWINDOW: + // If the window is being minimized, close popups. + if (aLParam == SW_PARENTCLOSING) { + allowAnimations = nsIRollupListener::AllowAnimations::No; + break; + } + return false; + + case WM_KILLFOCUS: + // If focus moves to other window created in different process/thread, + // e.g., a plugin window, popups should be rolled up. + if (IsDifferentThreadWindow(reinterpret_cast<HWND>(aWParam))) { + allowAnimations = nsIRollupListener::AllowAnimations::No; + break; + } + return false; + + case WM_MOVING: + case WM_MENUSELECT: + break; + + default: + return false; + } + + // Only need to deal with the last rollup for left mouse down events. + NS_ASSERTION(!nsAutoRollup::GetLastRollup(), "last rollup is null"); + + nsIRollupListener::RollupOptions rollupOptions{ + popupsToRollup, + nsIRollupListener::FlushViews::Yes, + /* mPoint = */ nullptr, + allowAnimations, + }; + + if (nativeMessage == WM_TOUCH || nativeMessage == WM_LBUTTONDOWN || + nativeMessage == WM_POINTERDOWN) { + LayoutDeviceIntPoint pos; + if (nativeMessage == WM_TOUCH) { + pos.x = touchPoint->x; + pos.y = touchPoint->y; + } else { + POINT pt; + pt.x = GET_X_LPARAM(aLParam); + pt.y = GET_Y_LPARAM(aLParam); + // POINTERDOWN is already in screen coords. + if (nativeMessage == WM_LBUTTONDOWN) { + ::ClientToScreen(aWnd, &pt); + } + pos = LayoutDeviceIntPoint(pt.x, pt.y); + } + + rollupOptions.mPoint = &pos; + nsIContent* lastRollup = nullptr; + consumeRollupEvent = rollupListener->Rollup(rollupOptions, &lastRollup); + nsAutoRollup::SetLastRollup(lastRollup); + } else { + consumeRollupEvent = rollupListener->Rollup(rollupOptions); + } + + // Tell hook to stop processing messages + sProcessHook = false; + sRollupMsgId = 0; + sRollupMsgWnd = nullptr; + + // If we are NOT supposed to be consuming events, let it go through + if (consumeRollupEvent && nativeMessage != WM_RBUTTONDOWN) { + *aResult = MA_ACTIVATE; + return true; + } + + return false; +} + +/************************************************************** + ************************************************************** + ** + ** BLOCK: Misc. utility methods and functions. + ** + ** General use. + ** + ************************************************************** + **************************************************************/ + +// Note that the result of GetTopLevelWindow method can be different from the +// result of WinUtils::GetTopLevelHWND(). The result can be non-floating +// window. Because our top level window may be contained in another window +// which is not managed by us. +nsWindow* nsWindow::GetTopLevelWindow(bool aStopOnDialogOrPopup) { + nsWindow* curWindow = this; + + while (true) { + if (aStopOnDialogOrPopup) { + switch (curWindow->mWindowType) { + case WindowType::Dialog: + case WindowType::Popup: + return curWindow; + default: + break; + } + } + + // Retrieve the top level parent or owner window + nsWindow* parentWindow = curWindow->GetParentWindow(true); + + if (!parentWindow) return curWindow; + + curWindow = parentWindow; + } +} + +// Set a flag if hwnd is a (non-popup) visible window from this process, +// and bail out of the enumeration. Otherwise leave the flag unmodified +// and continue the enumeration. +// lParam must be a bool* pointing at the flag to be set. +static BOOL CALLBACK EnumVisibleWindowsProc(HWND hwnd, LPARAM lParam) { + DWORD pid; + ::GetWindowThreadProcessId(hwnd, &pid); + if (pid == ::GetCurrentProcessId() && ::IsWindowVisible(hwnd)) { + // Don't count popups as visible windows, since they don't take focus, + // in case we only have a popup visible (see bug 1554490 where the gfx + // test window is an offscreen popup). + nsWindow* window = WinUtils::GetNSWindowPtr(hwnd); + if (!window || !window->IsPopup()) { + bool* windowsVisible = reinterpret_cast<bool*>(lParam); + *windowsVisible = true; + return FALSE; + } + } + return TRUE; +} + +// Determine if it would be ok to activate a window, taking focus. +// We want to avoid stealing focus from another app (bug 225305). +bool nsWindow::CanTakeFocus() { + HWND fgWnd = ::GetForegroundWindow(); + if (!fgWnd) { + // There is no foreground window, so don't worry about stealing focus. + return true; + } + // We can take focus if the current foreground window is already from + // this process. + DWORD pid; + ::GetWindowThreadProcessId(fgWnd, &pid); + if (pid == ::GetCurrentProcessId()) { + return true; + } + + bool windowsVisible = false; + ::EnumWindows(EnumVisibleWindowsProc, + reinterpret_cast<LPARAM>(&windowsVisible)); + + if (!windowsVisible) { + // We're probably creating our first visible window, allow that to + // take focus. + return true; + } + return false; +} + +/* static */ const wchar_t* nsWindow::GetMainWindowClass() { + static const wchar_t* sMainWindowClass = nullptr; + if (!sMainWindowClass) { + nsAutoString className; + Preferences::GetString("ui.window_class_override", className); + if (!className.IsEmpty()) { + sMainWindowClass = wcsdup(className.get()); + } else { + sMainWindowClass = kClassNameGeneral; + } + } + return sMainWindowClass; +} + +LPARAM nsWindow::lParamToScreen(LPARAM lParam) { + POINT pt; + pt.x = GET_X_LPARAM(lParam); + pt.y = GET_Y_LPARAM(lParam); + ::ClientToScreen(mWnd, &pt); + return MAKELPARAM(pt.x, pt.y); +} + +LPARAM nsWindow::lParamToClient(LPARAM lParam) { + POINT pt; + pt.x = GET_X_LPARAM(lParam); + pt.y = GET_Y_LPARAM(lParam); + ::ScreenToClient(mWnd, &pt); + return MAKELPARAM(pt.x, pt.y); +} + +WPARAM nsWindow::wParamFromGlobalMouseState() { + WPARAM result = 0; + + if (!!::GetKeyState(VK_CONTROL)) { + result |= MK_CONTROL; + } + + if (!!::GetKeyState(VK_SHIFT)) { + result |= MK_SHIFT; + } + + if (!!::GetKeyState(VK_LBUTTON)) { + result |= MK_LBUTTON; + } + + if (!!::GetKeyState(VK_MBUTTON)) { + result |= MK_MBUTTON; + } + + if (!!::GetKeyState(VK_RBUTTON)) { + result |= MK_RBUTTON; + } + + if (!!::GetKeyState(VK_XBUTTON1)) { + result |= MK_XBUTTON1; + } + + if (!!::GetKeyState(VK_XBUTTON2)) { + result |= MK_XBUTTON2; + } + + return result; +} + +void nsWindow::PickerOpen() { mPickerDisplayCount++; } + +void nsWindow::PickerClosed() { + NS_ASSERTION(mPickerDisplayCount > 0, "mPickerDisplayCount out of sync!"); + if (!mPickerDisplayCount) return; + mPickerDisplayCount--; + if (!mPickerDisplayCount && mDestroyCalled) { + Destroy(); + } +} + +bool nsWindow::WidgetTypeSupportsAcceleration() { + // We don't currently support using an accelerated layer manager with + // transparent windows so don't even try. I'm also not sure if we even + // want to support this case. See bug 593471. + // + // Windows' support for transparent accelerated surfaces isn't great. + // Some possible approaches: + // - Readback the data and update it using + // UpdateLayeredWindow/UpdateLayeredWindowIndirect + // This is what WPF does. See + // CD3DDeviceLevel1::PresentWithGDI/CD3DSwapChainWithSwDC in WpfGfx. The + // rationale for not using IDirect3DSurface9::GetDC is explained here: + // https://web.archive.org/web/20160521191104/https://blogs.msdn.microsoft.com/dwayneneed/2008/09/08/transparent-windows-in-wpf/ + // - Use D3D11_RESOURCE_MISC_GDI_COMPATIBLE, IDXGISurface1::GetDC(), + // and UpdateLayeredWindowIndirect. + // This is suggested here: + // https://docs.microsoft.com/en-us/archive/msdn-magazine/2009/december/windows-with-c-layered-windows-with-direct2d + // but might have the same problem that IDirect3DSurface9::GetDC has. + // - Creating the window with the WS_EX_NOREDIRECTIONBITMAP flag and use + // DirectComposition. + // Not supported on Win7. + // - Using DwmExtendFrameIntoClientArea with negative margins and something + // to turn off the glass effect. + // This doesn't work when the DWM is not running (Win7) + // + // Also see bug 1150376, D3D11 composition can cause issues on some devices + // on Windows 7 where presentation fails randomly for windows with drop + // shadows. + return mTransparencyMode != TransparencyMode::Transparent && + !(IsPopup() && DeviceManagerDx::Get()->IsWARP()); +} + +bool nsWindow::DispatchTouchEventFromWMPointer( + UINT msg, LPARAM aLParam, const WinPointerInfo& aPointerInfo, + mozilla::MouseButton aButton) { + MultiTouchInput::MultiTouchType touchType; + switch (msg) { + case WM_POINTERDOWN: + touchType = MultiTouchInput::MULTITOUCH_START; + break; + case WM_POINTERUPDATE: + if (aPointerInfo.mPressure == 0) { + return false; // hover + } + touchType = MultiTouchInput::MULTITOUCH_MOVE; + break; + case WM_POINTERUP: + touchType = MultiTouchInput::MULTITOUCH_END; + break; + default: + return false; + } + + nsPointWin touchPoint; + touchPoint.x = GET_X_LPARAM(aLParam); + touchPoint.y = GET_Y_LPARAM(aLParam); + touchPoint.ScreenToClient(mWnd); + + SingleTouchData touchData(static_cast<int32_t>(aPointerInfo.pointerId), + ScreenIntPoint::FromUnknownPoint(touchPoint), + ScreenSize(1, 1), // pixel size radius for pen + 0.0f, // no radius rotation + aPointerInfo.mPressure); + touchData.mTiltX = aPointerInfo.tiltX; + touchData.mTiltY = aPointerInfo.tiltY; + touchData.mTwist = aPointerInfo.twist; + + MultiTouchInput touchInput; + touchInput.mType = touchType; + touchInput.mTimeStamp = GetMessageTimeStamp(::GetMessageTime()); + touchInput.mTouches.AppendElement(touchData); + touchInput.mButton = aButton; + touchInput.mButtons = aPointerInfo.mButtons; + + // POINTER_INFO.dwKeyStates can't be used as it only supports Shift and Ctrl + ModifierKeyState modifierKeyState; + touchInput.modifiers = modifierKeyState.GetModifiers(); + + DispatchTouchInput(touchInput, MouseEvent_Binding::MOZ_SOURCE_PEN); + return true; +} + +static MouseButton PenFlagsToMouseButton(PEN_FLAGS aPenFlags) { + // Theoretically flags can be set together but they do not + if (aPenFlags & PEN_FLAG_BARREL) { + return MouseButton::eSecondary; + } + if (aPenFlags & PEN_FLAG_ERASER) { + return MouseButton::eEraser; + } + return MouseButton::ePrimary; +} + +bool nsWindow::OnPointerEvents(UINT msg, WPARAM aWParam, LPARAM aLParam) { + if (!mAPZC) { + // APZ is not available on context menu. Follow the behavior of touch input + // which fallbacks to WM_LBUTTON* and WM_GESTURE, to keep consistency. + return false; + } + if (!mPointerEvents.ShouldHandleWinPointerMessages(msg, aWParam)) { + return false; + } + if (!mPointerEvents.ShouldFirePointerEventByWinPointerMessages()) { + // We have to handle WM_POINTER* to fetch and cache pen related information + // and fire WidgetMouseEvent with the cached information the WM_*BUTTONDOWN + // handler. This is because Windows doesn't support ::DoDragDrop in the + // touch or pen message handlers. + mPointerEvents.ConvertAndCachePointerInfo(msg, aWParam); + // Don't consume the Windows WM_POINTER* messages + return false; + } + + uint32_t pointerId = mPointerEvents.GetPointerId(aWParam); + POINTER_PEN_INFO penInfo{}; + if (!mPointerEvents.GetPointerPenInfo(pointerId, &penInfo)) { + return false; + } + + // When dispatching mouse events with pen, there may be some + // WM_POINTERUPDATE messages between WM_POINTERDOWN and WM_POINTERUP with + // small movements. Those events will reset sLastMousePoint and reset + // sLastClickCount. To prevent that, we keep the last pen down position + // and compare it with the subsequent WM_POINTERUPDATE. If the movement is + // smaller than GetSystemMetrics(SM_CXDRAG), then we suppress firing + // eMouseMove for WM_POINTERUPDATE. + static POINT sLastPointerDownPoint = {0}; + + // We don't support chorded buttons for pen. Keep the button at + // WM_POINTERDOWN. + static mozilla::MouseButton sLastPenDownButton = MouseButton::ePrimary; + static bool sPointerDown = false; + + EventMessage message; + mozilla::MouseButton button = MouseButton::ePrimary; + switch (msg) { + case WM_POINTERDOWN: { + LayoutDeviceIntPoint eventPoint(GET_X_LPARAM(aLParam), + GET_Y_LPARAM(aLParam)); + sLastPointerDownPoint.x = eventPoint.x; + sLastPointerDownPoint.y = eventPoint.y; + message = eMouseDown; + button = PenFlagsToMouseButton(penInfo.penFlags); + sLastPenDownButton = button; + sPointerDown = true; + } break; + case WM_POINTERUP: + message = eMouseUp; + MOZ_ASSERT(sPointerDown, "receive WM_POINTERUP w/o WM_POINTERDOWN"); + button = sPointerDown ? sLastPenDownButton : MouseButton::ePrimary; + sPointerDown = false; + break; + case WM_POINTERUPDATE: + message = eMouseMove; + if (sPointerDown) { + LayoutDeviceIntPoint eventPoint(GET_X_LPARAM(aLParam), + GET_Y_LPARAM(aLParam)); + int32_t movementX = sLastPointerDownPoint.x > eventPoint.x + ? sLastPointerDownPoint.x - eventPoint.x.value + : eventPoint.x.value - sLastPointerDownPoint.x; + int32_t movementY = sLastPointerDownPoint.y > eventPoint.y + ? sLastPointerDownPoint.y - eventPoint.y.value + : eventPoint.y.value - sLastPointerDownPoint.y; + bool insideMovementThreshold = + movementX < (int32_t)::GetSystemMetrics(SM_CXDRAG) && + movementY < (int32_t)::GetSystemMetrics(SM_CYDRAG); + + if (insideMovementThreshold) { + // Suppress firing eMouseMove for WM_POINTERUPDATE if the movement + // from last WM_POINTERDOWN is smaller than SM_CXDRAG / SM_CYDRAG + return false; + } + button = sLastPenDownButton; + } + break; + case WM_POINTERLEAVE: + message = eMouseExitFromWidget; + break; + default: + return false; + } + + // Windows defines the pen pressure is normalized to a range between 0 and + // 1024. Convert it to float. + float pressure = penInfo.pressure ? (float)penInfo.pressure / 1024 : 0; + int16_t buttons = sPointerDown + ? nsContentUtils::GetButtonsFlagForButton(button) + : MouseButtonsFlag::eNoButtons; + WinPointerInfo pointerInfo(pointerId, penInfo.tiltX, penInfo.tiltY, pressure, + buttons); + // Per + // https://learn.microsoft.com/en-us/windows/win32/api/winuser/ns-winuser-pointer_pen_info, + // the rotation is normalized in a range of 0 to 359. + MOZ_ASSERT(penInfo.rotation <= 359); + pointerInfo.twist = (int32_t)penInfo.rotation; + + // Fire touch events but not when the barrel button is pressed. + if (button != MouseButton::eSecondary && + StaticPrefs::dom_w3c_pointer_events_scroll_by_pen_enabled() && + DispatchTouchEventFromWMPointer(msg, aLParam, pointerInfo, button)) { + return true; + } + + // The aLParam of WM_POINTER* is the screen location. Convert it to client + // location + LPARAM newLParam = lParamToClient(aLParam); + DispatchMouseEvent(message, aWParam, newLParam, false, button, + MouseEvent_Binding::MOZ_SOURCE_PEN, &pointerInfo); + + if (button == MouseButton::eSecondary && message == eMouseUp) { + // Fire eContextMenu manually since consuming WM_POINTER* blocks + // WM_CONTEXTMENU + DispatchMouseEvent(eContextMenu, aWParam, newLParam, false, button, + MouseEvent_Binding::MOZ_SOURCE_PEN, &pointerInfo); + } + // Consume WM_POINTER* to stop Windows fires WM_*BUTTONDOWN / WM_*BUTTONUP + // WM_MOUSEMOVE. + return true; +} + +void nsWindow::GetCompositorWidgetInitData( + mozilla::widget::CompositorWidgetInitData* aInitData) { + *aInitData = WinCompositorWidgetInitData( + reinterpret_cast<uintptr_t>(mWnd), + reinterpret_cast<uintptr_t>(static_cast<nsIWidget*>(this)), + mTransparencyMode, mFrameState->GetSizeMode()); +} + +bool nsWindow::SynchronouslyRepaintOnResize() { + return !gfxWindowsPlatform::GetPlatform()->DwmCompositionEnabled(); +} + +void nsWindow::MaybeDispatchInitialFocusEvent() { + if (mIsShowingPreXULSkeletonUI && ::GetActiveWindow() == mWnd) { + DispatchFocusToTopLevelWindow(true); + } +} + +already_AddRefed<nsIWidget> nsIWidget::CreateTopLevelWindow() { + nsCOMPtr<nsIWidget> window = new nsWindow(); + return window.forget(); +} + +already_AddRefed<nsIWidget> nsIWidget::CreateChildWindow() { + nsCOMPtr<nsIWidget> window = new nsWindow(true); + return window.forget(); +} + +// static +bool nsWindow::InitTouchInjection() { + if (!sTouchInjectInitialized) { + // Initialize touch injection on the first call + HMODULE hMod = LoadLibraryW(kUser32LibName); + if (!hMod) { + return false; + } + + InitializeTouchInjectionPtr func = + (InitializeTouchInjectionPtr)GetProcAddress(hMod, + "InitializeTouchInjection"); + if (!func) { + WinUtils::Log("InitializeTouchInjection not available."); + return false; + } + + if (!func(TOUCH_INJECT_MAX_POINTS, TOUCH_FEEDBACK_DEFAULT)) { + WinUtils::Log("InitializeTouchInjection failure. GetLastError=%d", + GetLastError()); + return false; + } + + sInjectTouchFuncPtr = + (InjectTouchInputPtr)GetProcAddress(hMod, "InjectTouchInput"); + if (!sInjectTouchFuncPtr) { + WinUtils::Log("InjectTouchInput not available."); + return false; + } + sTouchInjectInitialized = true; + } + return true; +} + +bool nsWindow::InjectTouchPoint(uint32_t aId, LayoutDeviceIntPoint& aPoint, + POINTER_FLAGS aFlags, uint32_t aPressure, + uint32_t aOrientation) { + if (aId > TOUCH_INJECT_MAX_POINTS) { + WinUtils::Log("Pointer ID exceeds maximum. See TOUCH_INJECT_MAX_POINTS."); + return false; + } + + POINTER_TOUCH_INFO info{}; + + info.touchFlags = TOUCH_FLAG_NONE; + info.touchMask = + TOUCH_MASK_CONTACTAREA | TOUCH_MASK_ORIENTATION | TOUCH_MASK_PRESSURE; + info.pressure = aPressure; + info.orientation = aOrientation; + + info.pointerInfo.pointerFlags = aFlags; + info.pointerInfo.pointerType = PT_TOUCH; + info.pointerInfo.pointerId = aId; + info.pointerInfo.ptPixelLocation.x = aPoint.x; + info.pointerInfo.ptPixelLocation.y = aPoint.y; + + info.rcContact.top = info.pointerInfo.ptPixelLocation.y - 2; + info.rcContact.bottom = info.pointerInfo.ptPixelLocation.y + 2; + info.rcContact.left = info.pointerInfo.ptPixelLocation.x - 2; + info.rcContact.right = info.pointerInfo.ptPixelLocation.x + 2; + + for (int i = 0; i < 3; i++) { + if (sInjectTouchFuncPtr(1, &info)) { + break; + } + DWORD error = GetLastError(); + if (error == ERROR_NOT_READY && i < 2) { + // We sent it too quickly after the previous injection (see bug 1535140 + // comment 10). On the first loop iteration we just yield (via Sleep(0)) + // and try again. If it happens again on the second loop iteration we + // explicitly Sleep(1) and try again. If that doesn't work either we just + // error out. + ::Sleep(i); + continue; + } + WinUtils::Log("InjectTouchInput failure. GetLastError=%d", error); + return false; + } + return true; +} + +void nsWindow::ChangedDPI() { + if (mWidgetListener) { + if (PresShell* presShell = mWidgetListener->GetPresShell()) { + presShell->BackingScaleFactorChanged(); + } + } +} + +static Result<POINTER_FLAGS, nsresult> PointerStateToFlag( + nsWindow::TouchPointerState aPointerState, bool isUpdate) { + bool hover = aPointerState & nsWindow::TOUCH_HOVER; + bool contact = aPointerState & nsWindow::TOUCH_CONTACT; + bool remove = aPointerState & nsWindow::TOUCH_REMOVE; + bool cancel = aPointerState & nsWindow::TOUCH_CANCEL; + + POINTER_FLAGS flags; + if (isUpdate) { + // We know about this pointer, send an update + flags = POINTER_FLAG_UPDATE; + if (hover) { + flags |= POINTER_FLAG_INRANGE; + } else if (contact) { + flags |= POINTER_FLAG_INCONTACT | POINTER_FLAG_INRANGE; + } else if (remove) { + flags = POINTER_FLAG_UP; + } + + if (cancel) { + flags |= POINTER_FLAG_CANCELED; + } + } else { + // Missing init state, error out + if (remove || cancel) { + return Err(NS_ERROR_INVALID_ARG); + } + + // Create a new pointer + flags = POINTER_FLAG_INRANGE; + if (contact) { + flags |= POINTER_FLAG_INCONTACT | POINTER_FLAG_DOWN; + } + } + return flags; +} + +nsresult nsWindow::SynthesizeNativeTouchPoint( + uint32_t aPointerId, nsIWidget::TouchPointerState aPointerState, + LayoutDeviceIntPoint aPoint, double aPointerPressure, + uint32_t aPointerOrientation, nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "touchpoint"); + + if (StaticPrefs::apz_test_fails_with_native_injection() || + !InitTouchInjection()) { + // If we don't have touch injection from the OS, or if we are running a test + // that cannot properly inject events to satisfy the OS requirements (see + // bug 1313170) we can just fake it and synthesize the events from here. + MOZ_ASSERT(NS_IsMainThread()); + if (aPointerState == TOUCH_HOVER) { + return NS_ERROR_UNEXPECTED; + } + + if (!mSynthesizedTouchInput) { + mSynthesizedTouchInput = MakeUnique<MultiTouchInput>(); + } + + WidgetEventTime time = CurrentMessageWidgetEventTime(); + LayoutDeviceIntPoint pointInWindow = aPoint - WidgetToScreenOffset(); + MultiTouchInput inputToDispatch = UpdateSynthesizedTouchState( + mSynthesizedTouchInput.get(), time.mTimeStamp, aPointerId, + aPointerState, pointInWindow, aPointerPressure, aPointerOrientation); + DispatchTouchInput(inputToDispatch); + return NS_OK; + } + + // win api expects a value from 0 to 1024. aPointerPressure is a value + // from 0.0 to 1.0. + uint32_t pressure = (uint32_t)ceil(aPointerPressure * 1024); + + // If we already know about this pointer id get it's record + return mActivePointers.WithEntryHandle(aPointerId, [&](auto&& entry) { + POINTER_FLAGS flags; + // Can't use MOZ_TRY_VAR because it confuses WithEntryHandle + auto result = PointerStateToFlag(aPointerState, !!entry); + if (result.isOk()) { + flags = result.unwrap(); + } else { + return result.unwrapErr(); + } + + if (!entry) { + entry.Insert(MakeUnique<PointerInfo>(aPointerId, aPoint, + PointerInfo::PointerType::TOUCH)); + } else { + if (entry.Data()->mType != PointerInfo::PointerType::TOUCH) { + return NS_ERROR_UNEXPECTED; + } + if (aPointerState & TOUCH_REMOVE) { + // Remove the pointer from our tracking list. This is UniquePtr wrapped, + // so shouldn't leak. + entry.Remove(); + } + } + + return !InjectTouchPoint(aPointerId, aPoint, flags, pressure, + aPointerOrientation) + ? NS_ERROR_UNEXPECTED + : NS_OK; + }); +} + +nsresult nsWindow::ClearNativeTouchSequence(nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "cleartouch"); + if (!sTouchInjectInitialized) { + return NS_OK; + } + + // cancel all input points + for (auto iter = mActivePointers.Iter(); !iter.Done(); iter.Next()) { + auto* info = iter.UserData(); + if (info->mType != PointerInfo::PointerType::TOUCH) { + continue; + } + InjectTouchPoint(info->mPointerId, info->mPosition, POINTER_FLAG_CANCELED); + iter.Remove(); + } + + nsBaseWidget::ClearNativeTouchSequence(nullptr); + + return NS_OK; +} + +#if !defined(NTDDI_WIN10_RS5) || (NTDDI_VERSION < NTDDI_WIN10_RS5) +static CreateSyntheticPointerDevicePtr CreateSyntheticPointerDevice; +static DestroySyntheticPointerDevicePtr DestroySyntheticPointerDevice; +static InjectSyntheticPointerInputPtr InjectSyntheticPointerInput; +#endif +static HSYNTHETICPOINTERDEVICE sSyntheticPenDevice; + +static bool InitPenInjection() { + if (sSyntheticPenDevice) { + return true; + } +#if !defined(NTDDI_WIN10_RS5) || (NTDDI_VERSION < NTDDI_WIN10_RS5) + HMODULE hMod = LoadLibraryW(kUser32LibName); + if (!hMod) { + return false; + } + CreateSyntheticPointerDevice = + (CreateSyntheticPointerDevicePtr)GetProcAddress( + hMod, "CreateSyntheticPointerDevice"); + if (!CreateSyntheticPointerDevice) { + WinUtils::Log("CreateSyntheticPointerDevice not available."); + return false; + } + DestroySyntheticPointerDevice = + (DestroySyntheticPointerDevicePtr)GetProcAddress( + hMod, "DestroySyntheticPointerDevice"); + if (!DestroySyntheticPointerDevice) { + WinUtils::Log("DestroySyntheticPointerDevice not available."); + return false; + } + InjectSyntheticPointerInput = (InjectSyntheticPointerInputPtr)GetProcAddress( + hMod, "InjectSyntheticPointerInput"); + if (!InjectSyntheticPointerInput) { + WinUtils::Log("InjectSyntheticPointerInput not available."); + return false; + } +#endif + sSyntheticPenDevice = + CreateSyntheticPointerDevice(PT_PEN, 1, POINTER_FEEDBACK_DEFAULT); + return !!sSyntheticPenDevice; +} + +nsresult nsWindow::SynthesizeNativePenInput( + uint32_t aPointerId, nsIWidget::TouchPointerState aPointerState, + LayoutDeviceIntPoint aPoint, double aPressure, uint32_t aRotation, + int32_t aTiltX, int32_t aTiltY, int32_t aButton, nsIObserver* aObserver) { + AutoObserverNotifier notifier(aObserver, "peninput"); + if (!InitPenInjection()) { + return NS_ERROR_UNEXPECTED; + } + + // win api expects a value from 0 to 1024. aPointerPressure is a value + // from 0.0 to 1.0. + uint32_t pressure = (uint32_t)ceil(aPressure * 1024); + + // If we already know about this pointer id get it's record + return mActivePointers.WithEntryHandle(aPointerId, [&](auto&& entry) { + POINTER_FLAGS flags; + // Can't use MOZ_TRY_VAR because it confuses WithEntryHandle + auto result = PointerStateToFlag(aPointerState, !!entry); + if (result.isOk()) { + flags = result.unwrap(); + } else { + return result.unwrapErr(); + } + + if (!entry) { + entry.Insert(MakeUnique<PointerInfo>(aPointerId, aPoint, + PointerInfo::PointerType::PEN)); + } else { + if (entry.Data()->mType != PointerInfo::PointerType::PEN) { + return NS_ERROR_UNEXPECTED; + } + if (aPointerState & TOUCH_REMOVE) { + // Remove the pointer from our tracking list. This is UniquePtr wrapped, + // so shouldn't leak. + entry.Remove(); + } + } + + POINTER_TYPE_INFO info{}; + + info.type = PT_PEN; + info.penInfo.pointerInfo.pointerType = PT_PEN; + info.penInfo.pointerInfo.pointerFlags = flags; + info.penInfo.pointerInfo.pointerId = aPointerId; + info.penInfo.pointerInfo.ptPixelLocation.x = aPoint.x; + info.penInfo.pointerInfo.ptPixelLocation.y = aPoint.y; + + info.penInfo.penFlags = PEN_FLAG_NONE; + // PEN_FLAG_ERASER is not supported this way, unfortunately. + if (aButton == 2) { + info.penInfo.penFlags |= PEN_FLAG_BARREL; + } + info.penInfo.penMask = PEN_MASK_PRESSURE | PEN_MASK_ROTATION | + PEN_MASK_TILT_X | PEN_MASK_TILT_Y; + info.penInfo.pressure = pressure; + info.penInfo.rotation = aRotation; + info.penInfo.tiltX = aTiltX; + info.penInfo.tiltY = aTiltY; + + return InjectSyntheticPointerInput(sSyntheticPenDevice, &info, 1) + ? NS_OK + : NS_ERROR_UNEXPECTED; + }); +}; + +bool nsWindow::HandleAppCommandMsg(const MSG& aAppCommandMsg, + LRESULT* aRetValue) { + ModifierKeyState modKeyState; + NativeKey nativeKey(this, aAppCommandMsg, modKeyState); + bool consumed = nativeKey.HandleAppCommandMessage(); + *aRetValue = consumed ? 1 : 0; + return consumed; +} + +#ifdef DEBUG +nsresult nsWindow::SetHiDPIMode(bool aHiDPI) { + return WinUtils::SetHiDPIMode(aHiDPI); +} + +nsresult nsWindow::RestoreHiDPIMode() { return WinUtils::RestoreHiDPIMode(); } +#endif + +mozilla::Maybe<UINT> nsWindow::GetHiddenTaskbarEdge() { + HMONITOR windowMonitor = ::MonitorFromWindow(mWnd, MONITOR_DEFAULTTONEAREST); + + if (!IsWin8OrLater()) { + // Per-monitor taskbar information is not available. + APPBARDATA appBarData; + appBarData.cbSize = sizeof(appBarData); + UINT taskbarState = SHAppBarMessage(ABM_GETSTATE, &appBarData); + if (ABS_AUTOHIDE & taskbarState) { + appBarData.hWnd = FindWindow(L"Shell_TrayWnd", nullptr); + if (appBarData.hWnd) { + HMONITOR taskbarMonitor = + ::MonitorFromWindow(appBarData.hWnd, MONITOR_DEFAULTTOPRIMARY); + if (taskbarMonitor == windowMonitor) { + SHAppBarMessage(ABM_GETTASKBARPOS, &appBarData); + return Some(appBarData.uEdge); + } + } + } + return Nothing(); + } + + // Check all four sides of our monitor for an appbar. Skip any that aren't + // the system taskbar. + MONITORINFO mi; + mi.cbSize = sizeof(MONITORINFO); + ::GetMonitorInfo(windowMonitor, &mi); + + APPBARDATA appBarData; + appBarData.cbSize = sizeof(appBarData); + appBarData.rc = mi.rcMonitor; + const auto kEdges = {ABE_BOTTOM, ABE_TOP, ABE_LEFT, ABE_RIGHT}; + for (auto edge : kEdges) { + appBarData.uEdge = edge; + // ABM_GETAUTOHIDEBAREX is not defined before Windows 8. + static constexpr DWORD ABM_GETAUTOHIDEBAREX = 0x000b; + HWND appBarHwnd = (HWND)SHAppBarMessage(ABM_GETAUTOHIDEBAREX, &appBarData); + if (appBarHwnd) { + nsAutoString className; + if (WinUtils::GetClassName(appBarHwnd, className)) { + if (className.Equals(L"Shell_TrayWnd") || + className.Equals(L"Shell_SecondaryTrayWnd")) { + return Some(edge); + } + } + } + } + + return Nothing(); +} + +static nsSizeMode GetSizeModeForWindowFrame(HWND aWnd, bool aFullscreenMode) { + WINDOWPLACEMENT pl; + pl.length = sizeof(pl); + ::GetWindowPlacement(aWnd, &pl); + + if (pl.showCmd == SW_SHOWMINIMIZED) { + return nsSizeMode_Minimized; + } else if (aFullscreenMode) { + return nsSizeMode_Fullscreen; + } else if (pl.showCmd == SW_SHOWMAXIMIZED) { + return nsSizeMode_Maximized; + } else { + return nsSizeMode_Normal; + } +} + +static void ShowWindowWithMode(HWND aWnd, nsSizeMode aMode) { + // This will likely cause a callback to + // nsWindow::FrameState::{OnFrameChanging() and OnFrameChanged()} + switch (aMode) { + case nsSizeMode_Fullscreen: + ::ShowWindow(aWnd, SW_SHOW); + break; + + case nsSizeMode_Maximized: + ::ShowWindow(aWnd, SW_MAXIMIZE); + break; + + case nsSizeMode_Minimized: + ::ShowWindow(aWnd, SW_MINIMIZE); + break; + + default: + // Don't call ::ShowWindow if we're trying to "restore" a window that is + // already in a normal state. Prevents a bug where snapping to one side + // of the screen and then minimizing would cause Windows to forget our + // window's correct restored position/size. + if (GetCurrentShowCmd(aWnd) != SW_SHOWNORMAL) { + ::ShowWindow(aWnd, SW_RESTORE); + } + } +} + +nsWindow::FrameState::FrameState(nsWindow* aWindow) : mWindow(aWindow) {} + +nsSizeMode nsWindow::FrameState::GetSizeMode() const { return mSizeMode; } + +void nsWindow::FrameState::CheckInvariant() const { + MOZ_ASSERT(mSizeMode >= 0 && mSizeMode < nsSizeMode_Invalid); + MOZ_ASSERT(mLastSizeMode >= 0 && mLastSizeMode < nsSizeMode_Invalid); + MOZ_ASSERT(mPreFullscreenSizeMode >= 0 && + mPreFullscreenSizeMode < nsSizeMode_Invalid); + MOZ_ASSERT(mWindow); + + // We should never observe fullscreen sizemode unless fullscreen is enabled + MOZ_ASSERT_IF(mSizeMode == nsSizeMode_Fullscreen, mFullscreenMode); + MOZ_ASSERT_IF(!mFullscreenMode, mSizeMode != nsSizeMode_Fullscreen); + + // Something went wrong if we somehow saved fullscreen mode when we are + // changing into fullscreen mode + MOZ_ASSERT(mPreFullscreenSizeMode != nsSizeMode_Fullscreen); +} + +void nsWindow::FrameState::ConsumePreXULSkeletonState(bool aWasMaximized) { + mSizeMode = aWasMaximized ? nsSizeMode_Maximized : nsSizeMode_Normal; +} + +void nsWindow::FrameState::EnsureSizeMode(nsSizeMode aMode, + DoShowWindow aDoShowWindow) { + if (mSizeMode == aMode) { + return; + } + + if (aMode == nsSizeMode_Fullscreen) { + EnsureFullscreenMode(true, aDoShowWindow); + MOZ_ASSERT(mSizeMode == nsSizeMode_Fullscreen); + } else if (mSizeMode == nsSizeMode_Fullscreen && aMode == nsSizeMode_Normal) { + // If we are in fullscreen mode, minimize should work like normal and + // return us to fullscreen mode when unminimized. Maximize isn't really + // available and won't do anything. "Restore" should do the same thing as + // requesting to end fullscreen. + EnsureFullscreenMode(false, aDoShowWindow); + } else { + SetSizeModeInternal(aMode, aDoShowWindow); + } +} + +void nsWindow::FrameState::EnsureFullscreenMode(bool aFullScreen, + DoShowWindow aDoShowWindow) { + const bool changed = aFullScreen != mFullscreenMode; + if (changed && aFullScreen) { + // Save the size mode from before fullscreen. + mPreFullscreenSizeMode = mSizeMode; + } + mFullscreenMode = aFullScreen; + if (changed || aFullScreen) { + // NOTE(emilio): When minimizing a fullscreen window we remain with + // mFullscreenMode = true, but mSizeMode = nsSizeMode_Minimized. We need to + // make sure to call SetSizeModeInternal even if mFullscreenMode didn't + // change, to ensure we actually end up with a fullscreen sizemode when + // restoring a window from that state. + SetSizeModeInternal( + aFullScreen ? nsSizeMode_Fullscreen : mPreFullscreenSizeMode, + aDoShowWindow); + } +} + +void nsWindow::FrameState::OnFrameChanging() { + const nsSizeMode newSizeMode = + GetSizeModeForWindowFrame(mWindow->mWnd, mFullscreenMode); + EnsureSizeMode(newSizeMode); + mWindow->UpdateNonClientMargins(false); +} + +void nsWindow::FrameState::OnFrameChanged() { + // We don't want to perform the ShowWindow ourselves if we're on the frame + // changed message. Windows has done the frame change for us, and we take care + // of activating as needed. We also don't want to potentially trigger + // more focus / restore. Among other things, this addresses a bug on Win7 + // related to window docking. (bug 489258) + const auto newSizeMode = + GetSizeModeForWindowFrame(mWindow->mWnd, mFullscreenMode); + EnsureSizeMode(newSizeMode, DoShowWindow::No); + + // If window was restored, activate the window now to get correct attributes. + if (mWindow->mIsVisible && mWindow->IsForegroundWindow() && + mLastSizeMode == nsSizeMode_Minimized && + mSizeMode != nsSizeMode_Minimized) { + mWindow->DispatchFocusToTopLevelWindow(true); + } + mLastSizeMode = mSizeMode; +} + +static void MaybeLogSizeMode(nsSizeMode aMode) { +#ifdef WINSTATE_DEBUG_OUTPUT + MOZ_LOG(gWindowsLog, LogLevel::Info, ("*** SizeMode: %d\n", int(aMode))); +#endif +} + +void nsWindow::FrameState::SetSizeModeInternal(nsSizeMode aMode, + DoShowWindow aDoShowWindow) { + if (mSizeMode == aMode) { + return; + } + + const auto oldSizeMode = mSizeMode; + const bool fullscreenChange = + mSizeMode == nsSizeMode_Fullscreen || aMode == nsSizeMode_Fullscreen; + const bool fullscreen = aMode == nsSizeMode_Fullscreen; + + mLastSizeMode = mSizeMode; + mSizeMode = aMode; + + MaybeLogSizeMode(mSizeMode); + + if (bool(aDoShowWindow) && mWindow->mIsVisible) { + ShowWindowWithMode(mWindow->mWnd, aMode); + } + + mWindow->UpdateNonClientMargins(false); + + if (fullscreenChange) { + mWindow->OnFullscreenChanged(oldSizeMode, fullscreen); + } + + mWindow->OnSizeModeChange(); +} + +void nsWindow::ContextMenuPreventer::Update( + const WidgetMouseEvent& aEvent, + const nsIWidget::ContentAndAPZEventStatus& aEventStatus) { + mNeedsToPreventContextMenu = + aEvent.mMessage == eMouseUp && + aEvent.mButton == MouseButton::eSecondary && + aEvent.mInputSource == MouseEvent_Binding::MOZ_SOURCE_MOUSE && + aEventStatus.mApzStatus == nsEventStatus_eConsumeNoDefault; +} |