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Diffstat (limited to 'widget/windows/nsAppShell.cpp')
| -rw-r--r-- | widget/windows/nsAppShell.cpp | 436 |
1 files changed, 436 insertions, 0 deletions
diff --git a/widget/windows/nsAppShell.cpp b/widget/windows/nsAppShell.cpp new file mode 100644 index 000000000..c8820e7d1 --- /dev/null +++ b/widget/windows/nsAppShell.cpp @@ -0,0 +1,436 @@ +/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "mozilla/ipc/MessageChannel.h" +#include "mozilla/ipc/WindowsMessageLoop.h" +#include "nsAppShell.h" +#include "nsToolkit.h" +#include "nsThreadUtils.h" +#include "WinUtils.h" +#include "WinTaskbar.h" +#include "WinMouseScrollHandler.h" +#include "nsWindowDefs.h" +#include "nsString.h" +#include "WinIMEHandler.h" +#include "mozilla/widget/AudioSession.h" +#include "mozilla/HangMonitor.h" +#include "nsIDOMWakeLockListener.h" +#include "nsIPowerManagerService.h" +#include "mozilla/StaticPtr.h" +#include "nsTHashtable.h" +#include "nsHashKeys.h" +#include "GeckoProfiler.h" +#include "nsComponentManagerUtils.h" +#include "nsITimer.h" + +// These are two messages that the code in winspool.drv on Windows 7 explicitly +// waits for while it is pumping other Windows messages, during display of the +// Printer Properties dialog. +#define MOZ_WM_PRINTER_PROPERTIES_COMPLETION 0x5b7a +#define MOZ_WM_PRINTER_PROPERTIES_FAILURE 0x5b7f + +using namespace mozilla; +using namespace mozilla::widget; + +#define WAKE_LOCK_LOG(...) MOZ_LOG(GetWinWakeLockLog(), mozilla::LogLevel::Debug, (__VA_ARGS__)) +PRLogModuleInfo* GetWinWakeLockLog() { + static PRLogModuleInfo* log = nullptr; + if (!log) { + log = PR_NewLogModule("WinWakeLock"); + } + return log; +} + +// A wake lock listener that disables screen saver when requested by +// Gecko. For example when we're playing video in a foreground tab we +// don't want the screen saver to turn on. +class WinWakeLockListener final : public nsIDOMMozWakeLockListener + , public nsITimerCallback { +public: + NS_DECL_ISUPPORTS; + + NS_IMETHOD Notify(nsITimer *timer) override { + WAKE_LOCK_LOG("WinWakeLock: periodic timer fired"); + ResetScreenSaverTimeout(); + return NS_OK; + } +private: + ~WinWakeLockListener() {} + + NS_IMETHOD Callback(const nsAString& aTopic, const nsAString& aState) { + if (!aTopic.EqualsASCII("screen")) { + return NS_OK; + } + // Note the wake lock code ensures that we're not sent duplicate + // "locked-foreground" notifications when multipe wake locks are held. + if (aState.EqualsASCII("locked-foreground")) { + WAKE_LOCK_LOG("WinWakeLock: Blocking screen saver"); + // We block the screen saver by periodically resetting the screen + // saver timeout. + StartTimer(); + // Prevent the display turning off. On Win7 and later this also + // blocks the screen saver, but we need the timer started above + // to block on Win XP and Vista. + SetThreadExecutionState(ES_DISPLAY_REQUIRED|ES_CONTINUOUS); + } else { + WAKE_LOCK_LOG("WinWakeLock: Unblocking screen saver"); + // Re-enable screen saver. + StopTimer(); + // Unblock display turning off. + SetThreadExecutionState(ES_CONTINUOUS); + } + return NS_OK; + } + + void StartTimer() { + ResetScreenSaverTimeout(); + MOZ_ASSERT(!mTimer); + if (mTimer) { + return; + } + + nsresult rv; + nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv); + if (NS_FAILED(rv)) { + NS_WARNING("Failed to create screen saver timeout reset timer"); + return; + } + // The minimum screensaver timeout that can be specified with Windows' UI + // is 60 seconds. We set a timer to re-jig the screen saver 10 seconds + // before we expect the timer to run out, but always at least in 1 second + // intervals. We reset the timer at a max of 50 seconds, so that if the + // user changes the timeout using the UI, we won't be caught out. + int32_t timeout = std::max(std::min(50, (int32_t)mScreenSaverTimeout - 10), 1); + uint32_t timeoutMs = (uint32_t)timeout * 1000; + WAKE_LOCK_LOG("WinWakeLock: Setting periodic timer for %d ms", timeoutMs); + rv = timer->InitWithCallback(this, + timeoutMs, + nsITimer::TYPE_REPEATING_SLACK); + if (NS_FAILED(rv)) { + NS_WARNING("Failed to initialize screen saver timeout reset timer"); + return; + } + + mTimer = timer.forget(); + } + + void StopTimer() { + WAKE_LOCK_LOG("WinWakeLock: StopTimer()"); + if (!mTimer) { + return; + } + mTimer->Cancel(); + mTimer = nullptr; + } + + // Resets the operating system's timeout for when to disable the screen. + // Called periodically to keep the screensaver off. + void ResetScreenSaverTimeout() { + if (SystemParametersInfo(SPI_GETSCREENSAVETIMEOUT, 0, &mScreenSaverTimeout, 0)) { + SystemParametersInfo(SPI_SETSCREENSAVETIMEOUT, mScreenSaverTimeout, NULL, 0); + } + WAKE_LOCK_LOG("WinWakeLock: ResetScreenSaverTimeout() mScreenSaverTimeout=%d", mScreenSaverTimeout); + } + + UINT mScreenSaverTimeout = 60; + nsCOMPtr<nsITimer> mTimer; +}; + +NS_IMPL_ISUPPORTS(WinWakeLockListener, nsIDOMMozWakeLockListener, nsITimerCallback) +StaticRefPtr<WinWakeLockListener> sWakeLockListener; + +static void +AddScreenWakeLockListener() +{ + nsCOMPtr<nsIPowerManagerService> sPowerManagerService = do_GetService(POWERMANAGERSERVICE_CONTRACTID); + if (sPowerManagerService) { + sWakeLockListener = new WinWakeLockListener(); + sPowerManagerService->AddWakeLockListener(sWakeLockListener); + } else { + NS_WARNING("Failed to retrieve PowerManagerService, wakelocks will be broken!"); + } +} + +static void +RemoveScreenWakeLockListener() +{ + nsCOMPtr<nsIPowerManagerService> sPowerManagerService = do_GetService(POWERMANAGERSERVICE_CONTRACTID); + if (sPowerManagerService) { + sPowerManagerService->RemoveWakeLockListener(sWakeLockListener); + sPowerManagerService = nullptr; + sWakeLockListener = nullptr; + } +} + +namespace mozilla { +namespace widget { +// Native event callback message. +UINT sAppShellGeckoMsgId = RegisterWindowMessageW(L"nsAppShell:EventID"); +} } + +const wchar_t* kTaskbarButtonEventId = L"TaskbarButtonCreated"; +UINT sTaskbarButtonCreatedMsg; + +/* static */ +UINT nsAppShell::GetTaskbarButtonCreatedMessage() { + return sTaskbarButtonCreatedMsg; +} + +namespace mozilla { +namespace crashreporter { +void LSPAnnotate(); +} // namespace crashreporter +} // namespace mozilla + +using mozilla::crashreporter::LSPAnnotate; + +//------------------------------------------------------------------------- + +/*static*/ LRESULT CALLBACK +nsAppShell::EventWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) +{ + if (uMsg == sAppShellGeckoMsgId) { + nsAppShell *as = reinterpret_cast<nsAppShell *>(lParam); + as->NativeEventCallback(); + NS_RELEASE(as); + return TRUE; + } + return DefWindowProc(hwnd, uMsg, wParam, lParam); +} + +nsAppShell::~nsAppShell() +{ + if (mEventWnd) { + // DestroyWindow doesn't do anything when called from a non UI thread. + // Since mEventWnd was created on the UI thread, it must be destroyed on + // the UI thread. + SendMessage(mEventWnd, WM_CLOSE, 0, 0); + } +} + +nsresult +nsAppShell::Init() +{ +#ifdef MOZ_CRASHREPORTER + LSPAnnotate(); +#endif + + mLastNativeEventScheduled = TimeStamp::NowLoRes(); + + mozilla::ipc::windows::InitUIThread(); + + sTaskbarButtonCreatedMsg = ::RegisterWindowMessageW(kTaskbarButtonEventId); + NS_ASSERTION(sTaskbarButtonCreatedMsg, "Could not register taskbar button creation message"); + + WNDCLASSW wc; + HINSTANCE module = GetModuleHandle(nullptr); + + const wchar_t *const kWindowClass = L"nsAppShell:EventWindowClass"; + if (!GetClassInfoW(module, kWindowClass, &wc)) { + wc.style = 0; + wc.lpfnWndProc = EventWindowProc; + wc.cbClsExtra = 0; + wc.cbWndExtra = 0; + wc.hInstance = module; + wc.hIcon = nullptr; + wc.hCursor = nullptr; + wc.hbrBackground = (HBRUSH) nullptr; + wc.lpszMenuName = (LPCWSTR) nullptr; + wc.lpszClassName = kWindowClass; + RegisterClassW(&wc); + } + + mEventWnd = CreateWindowW(kWindowClass, L"nsAppShell:EventWindow", + 0, 0, 0, 10, 10, nullptr, nullptr, module, nullptr); + NS_ENSURE_STATE(mEventWnd); + + return nsBaseAppShell::Init(); +} + +NS_IMETHODIMP +nsAppShell::Run(void) +{ + // Content processes initialize audio later through PContent using audio + // tray id information pulled from the browser process AudioSession. This + // way the two share a single volume control. + // Note StopAudioSession() is called from nsAppRunner.cpp after xpcom is torn + // down to insure the browser shuts down after child processes. + if (XRE_IsParentProcess()) { + mozilla::widget::StartAudioSession(); + } + + // Add an observer that disables the screen saver when requested by Gecko. + // For example when we're playing video in the foreground tab. + AddScreenWakeLockListener(); + + nsresult rv = nsBaseAppShell::Run(); + + RemoveScreenWakeLockListener(); + + return rv; +} + +NS_IMETHODIMP +nsAppShell::Exit(void) +{ + return nsBaseAppShell::Exit(); +} + +void +nsAppShell::DoProcessMoreGeckoEvents() +{ + // Called by nsBaseAppShell's NativeEventCallback() after it has finished + // processing pending gecko events and there are still gecko events pending + // for the thread. (This can happen if NS_ProcessPendingEvents reached it's + // starvation timeout limit.) The default behavior in nsBaseAppShell is to + // call ScheduleNativeEventCallback to post a follow up native event callback + // message. This triggers an additional call to NativeEventCallback for more + // gecko event processing. + + // There's a deadlock risk here with certain internal Windows modal loops. In + // our dispatch code, we prioritize messages so that input is handled first. + // However Windows modal dispatch loops often prioritize posted messages. If + // we find ourselves in a tight gecko timer loop where NS_ProcessPendingEvents + // takes longer than the timer duration, NS_HasPendingEvents(thread) will + // always be true. ScheduleNativeEventCallback will be called on every + // NativeEventCallback callback, and in a Windows modal dispatch loop, the + // callback message will be processed first -> input gets starved, dead lock. + + // To avoid, don't post native callback messages from NativeEventCallback + // when we're in a modal loop. This gets us back into the Windows modal + // dispatch loop dispatching input messages. Once we drop out of the modal + // loop, we use mNativeCallbackPending to fire off a final NativeEventCallback + // if we need it, which insures NS_ProcessPendingEvents gets called and all + // gecko events get processed. + if (mEventloopNestingLevel < 2) { + OnDispatchedEvent(nullptr); + mNativeCallbackPending = false; + } else { + mNativeCallbackPending = true; + } +} + +void +nsAppShell::ScheduleNativeEventCallback() +{ + // Post a message to the hidden message window + NS_ADDREF_THIS(); // will be released when the event is processed + { + MutexAutoLock lock(mLastNativeEventScheduledMutex); + // Time stamp this event so we can detect cases where the event gets + // dropping in sub classes / modal loops we do not control. + mLastNativeEventScheduled = TimeStamp::NowLoRes(); + } + ::PostMessage(mEventWnd, sAppShellGeckoMsgId, 0, reinterpret_cast<LPARAM>(this)); +} + +bool +nsAppShell::ProcessNextNativeEvent(bool mayWait) +{ + // Notify ipc we are spinning a (possibly nested) gecko event loop. + mozilla::ipc::MessageChannel::NotifyGeckoEventDispatch(); + + bool gotMessage = false; + + do { + MSG msg; + bool uiMessage = false; + + // For avoiding deadlock between our process and plugin process by + // mouse wheel messages, we're handling actually when we receive one of + // following internal messages which is posted by native mouse wheel + // message handler. Any other events, especially native modifier key + // events, should not be handled between native message and posted + // internal message because it may make different modifier key state or + // mouse cursor position between them. + if (mozilla::widget::MouseScrollHandler::IsWaitingInternalMessage()) { + gotMessage = WinUtils::PeekMessage(&msg, nullptr, MOZ_WM_MOUSEWHEEL_FIRST, + MOZ_WM_MOUSEWHEEL_LAST, PM_REMOVE); + NS_ASSERTION(gotMessage, + "waiting internal wheel message, but it has not come"); + uiMessage = gotMessage; + } + + if (!gotMessage) { + gotMessage = WinUtils::PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE); + uiMessage = + (msg.message >= WM_KEYFIRST && msg.message <= WM_IME_KEYLAST) || + (msg.message >= NS_WM_IMEFIRST && msg.message <= NS_WM_IMELAST) || + (msg.message >= WM_MOUSEFIRST && msg.message <= WM_MOUSELAST); + } + + if (gotMessage) { + if (msg.message == WM_QUIT) { + ::PostQuitMessage(msg.wParam); + Exit(); + } else { + // If we had UI activity we would be processing it now so we know we + // have either kUIActivity or kActivityNoUIAVail. + mozilla::HangMonitor::NotifyActivity( + uiMessage ? mozilla::HangMonitor::kUIActivity : + mozilla::HangMonitor::kActivityNoUIAVail); + + if (msg.message >= WM_KEYFIRST && msg.message <= WM_KEYLAST && + IMEHandler::ProcessRawKeyMessage(msg)) { + continue; // the message is consumed. + } + + // Store Printer Properties messages for reposting, because they are not + // processed by a window procedure, but are explicitly waited for in the + // winspool.drv code that will be further up the stack. + if (msg.message == MOZ_WM_PRINTER_PROPERTIES_COMPLETION || + msg.message == MOZ_WM_PRINTER_PROPERTIES_FAILURE) { + mMsgsToRepost.push_back(msg); + continue; + } + + ::TranslateMessage(&msg); + ::DispatchMessageW(&msg); + } + } else if (mayWait) { + // Block and wait for any posted application message + mozilla::HangMonitor::Suspend(); + { + GeckoProfilerSleepRAII profiler_sleep; + WinUtils::WaitForMessage(); + } + } + } while (!gotMessage && mayWait); + + // See DoProcessNextNativeEvent, mEventloopNestingLevel will be + // one when a modal loop unwinds. + if (mNativeCallbackPending && mEventloopNestingLevel == 1) + DoProcessMoreGeckoEvents(); + + // Check for starved native callbacks. If we haven't processed one + // of these events in NATIVE_EVENT_STARVATION_LIMIT, fire one off. + static const mozilla::TimeDuration nativeEventStarvationLimit = + mozilla::TimeDuration::FromSeconds(NATIVE_EVENT_STARVATION_LIMIT); + + TimeDuration timeSinceLastNativeEventScheduled; + { + MutexAutoLock lock(mLastNativeEventScheduledMutex); + timeSinceLastNativeEventScheduled = + TimeStamp::NowLoRes() - mLastNativeEventScheduled; + } + if (timeSinceLastNativeEventScheduled > nativeEventStarvationLimit) { + ScheduleNativeEventCallback(); + } + + return gotMessage; +} + +nsresult +nsAppShell::AfterProcessNextEvent(nsIThreadInternal* /* unused */, + bool /* unused */) +{ + if (!mMsgsToRepost.empty()) { + for (MSG msg : mMsgsToRepost) { + ::PostMessageW(msg.hwnd, msg.message, msg.wParam, msg.lParam); + } + mMsgsToRepost.clear(); + } + return NS_OK; +} |