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gecko-dev/widget/windows/WinMouseScrollHandler.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* 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/DebugOnly.h"
#include "mozilla/Logging.h"
#include "WinMouseScrollHandler.h"
#include "nsWindow.h"
#include "nsWindowDefs.h"
#include "KeyboardLayout.h"
#include "WinUtils.h"
#include "nsGkAtoms.h"
#include "nsIDOMWindowUtils.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/Preferences.h"
#include "mozilla/dom/WheelEventBinding.h"
#include "mozilla/StaticPrefs_mousewheel.h"
#include <psapi.h>
namespace mozilla {
namespace widget {
LazyLogModule gMouseScrollLog("MouseScrollHandlerWidgets");
static const char* GetBoolName(bool aBool) { return aBool ? "TRUE" : "FALSE"; }
MouseScrollHandler* MouseScrollHandler::sInstance = nullptr;
bool MouseScrollHandler::Device::sFakeScrollableWindowNeeded = false;
bool MouseScrollHandler::Device::SynTP::sInitialized = false;
int32_t MouseScrollHandler::Device::SynTP::sMajorVersion = 0;
int32_t MouseScrollHandler::Device::SynTP::sMinorVersion = -1;
bool MouseScrollHandler::Device::Elantech::sUseSwipeHack = false;
bool MouseScrollHandler::Device::Elantech::sUsePinchHack = false;
DWORD MouseScrollHandler::Device::Elantech::sZoomUntil = 0;
bool MouseScrollHandler::Device::Apoint::sInitialized = false;
int32_t MouseScrollHandler::Device::Apoint::sMajorVersion = 0;
int32_t MouseScrollHandler::Device::Apoint::sMinorVersion = -1;
bool MouseScrollHandler::Device::SetPoint::sMightBeUsing = false;
// The duration until timeout of events transaction. The value is 1.5 sec,
// it's just a magic number, it was suggested by Logitech's engineer, see
// bug 605648 comment 90.
#define DEFAULT_TIMEOUT_DURATION 1500
/******************************************************************************
*
* MouseScrollHandler
*
******************************************************************************/
/* static */
POINTS
MouseScrollHandler::GetCurrentMessagePos() {
if (SynthesizingEvent::IsSynthesizing()) {
return sInstance->mSynthesizingEvent->GetCursorPoint();
}
DWORD pos = ::GetMessagePos();
return MAKEPOINTS(pos);
}
// Get rid of the GetMessagePos() API.
#define GetMessagePos()
/* static */
void MouseScrollHandler::Initialize() { Device::Init(); }
/* static */
void MouseScrollHandler::Shutdown() {
delete sInstance;
sInstance = nullptr;
}
/* static */
MouseScrollHandler* MouseScrollHandler::GetInstance() {
if (!sInstance) {
sInstance = new MouseScrollHandler();
}
return sInstance;
}
MouseScrollHandler::MouseScrollHandler()
: mIsWaitingInternalMessage(false), mSynthesizingEvent(nullptr) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll: Creating an instance, this=%p, sInstance=%p", this,
sInstance));
}
MouseScrollHandler::~MouseScrollHandler() {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll: Destroying an instance, this=%p, sInstance=%p", this,
sInstance));
delete mSynthesizingEvent;
}
/* static */
void MouseScrollHandler::MaybeLogKeyState() {
if (!MOZ_LOG_TEST(gMouseScrollLog, LogLevel::Debug)) {
return;
}
BYTE keyboardState[256];
if (::GetKeyboardState(keyboardState)) {
for (size_t i = 0; i < ArrayLength(keyboardState); i++) {
if (keyboardState[i]) {
MOZ_LOG(gMouseScrollLog, LogLevel::Debug,
(" Current key state: keyboardState[0x%02zX]=0x%02X (%s)", i,
keyboardState[i],
((keyboardState[i] & 0x81) == 0x81) ? "Pressed and Toggled"
: (keyboardState[i] & 0x80) ? "Pressed"
: (keyboardState[i] & 0x01) ? "Toggled"
: "Unknown"));
}
}
} else {
MOZ_LOG(
gMouseScrollLog, LogLevel::Debug,
("MouseScroll::MaybeLogKeyState(): Failed to print current keyboard "
"state"));
}
}
/* static */
bool MouseScrollHandler::NeedsMessage(UINT aMsg) {
switch (aMsg) {
case WM_SETTINGCHANGE:
case WM_MOUSEWHEEL:
case WM_MOUSEHWHEEL:
case WM_HSCROLL:
case WM_VSCROLL:
case MOZ_WM_MOUSEVWHEEL:
case MOZ_WM_MOUSEHWHEEL:
case MOZ_WM_HSCROLL:
case MOZ_WM_VSCROLL:
case WM_KEYDOWN:
case WM_KEYUP:
return true;
}
return false;
}
/* static */
bool MouseScrollHandler::ProcessMessage(nsWindow* aWidget, UINT msg,
WPARAM wParam, LPARAM lParam,
MSGResult& aResult) {
Device::Elantech::UpdateZoomUntil();
switch (msg) {
case WM_SETTINGCHANGE:
if (!sInstance) {
return false;
}
if (wParam == SPI_SETWHEELSCROLLLINES ||
wParam == SPI_SETWHEELSCROLLCHARS) {
sInstance->mSystemSettings.MarkDirty();
}
return false;
case WM_MOUSEWHEEL:
case WM_MOUSEHWHEEL:
GetInstance()->ProcessNativeMouseWheelMessage(aWidget, msg, wParam,
lParam);
sInstance->mSynthesizingEvent->NotifyNativeMessageHandlingFinished();
// We don't need to call next wndproc for WM_MOUSEWHEEL and
// WM_MOUSEHWHEEL. We should consume them always. If the messages
// would be handled by our window again, it caused making infinite
// message loop.
aResult.mConsumed = true;
aResult.mResult = (msg != WM_MOUSEHWHEEL);
return true;
case WM_HSCROLL:
case WM_VSCROLL:
aResult.mConsumed = GetInstance()->ProcessNativeScrollMessage(
aWidget, msg, wParam, lParam);
sInstance->mSynthesizingEvent->NotifyNativeMessageHandlingFinished();
aResult.mResult = 0;
return true;
case MOZ_WM_MOUSEVWHEEL:
case MOZ_WM_MOUSEHWHEEL:
GetInstance()->HandleMouseWheelMessage(aWidget, msg, wParam, lParam);
sInstance->mSynthesizingEvent->NotifyInternalMessageHandlingFinished();
// Doesn't need to call next wndproc for internal wheel message.
aResult.mConsumed = true;
return true;
case MOZ_WM_HSCROLL:
case MOZ_WM_VSCROLL:
GetInstance()->HandleScrollMessageAsMouseWheelMessage(aWidget, msg,
wParam, lParam);
sInstance->mSynthesizingEvent->NotifyInternalMessageHandlingFinished();
// Doesn't need to call next wndproc for internal scroll message.
aResult.mConsumed = true;
return true;
case WM_KEYDOWN:
case WM_KEYUP:
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessMessage(): aWidget=%p, "
"msg=%s(0x%04X), wParam=0x%02zX, ::GetMessageTime()=%ld",
aWidget,
msg == WM_KEYDOWN ? "WM_KEYDOWN"
: msg == WM_KEYUP ? "WM_KEYUP"
: "Unknown",
msg, wParam, ::GetMessageTime()));
MaybeLogKeyState();
if (Device::Elantech::HandleKeyMessage(aWidget, msg, wParam, lParam)) {
aResult.mResult = 0;
aResult.mConsumed = true;
return true;
}
return false;
default:
return false;
}
}
/* static */
nsresult MouseScrollHandler::SynthesizeNativeMouseScrollEvent(
nsWindow* aWidget, const LayoutDeviceIntPoint& aPoint,
uint32_t aNativeMessage, int32_t aDelta, uint32_t aModifierFlags,
uint32_t aAdditionalFlags) {
bool useFocusedWindow = !(
aAdditionalFlags & nsIDOMWindowUtils::MOUSESCROLL_PREFER_WIDGET_AT_POINT);
POINT pt;
pt.x = aPoint.x;
pt.y = aPoint.y;
HWND target = useFocusedWindow ? ::WindowFromPoint(pt) : ::GetFocus();
NS_ENSURE_TRUE(target, NS_ERROR_FAILURE);
WPARAM wParam = 0;
LPARAM lParam = 0;
switch (aNativeMessage) {
case WM_MOUSEWHEEL:
case WM_MOUSEHWHEEL: {
lParam = MAKELPARAM(pt.x, pt.y);
WORD mod = 0;
if (aModifierFlags & (nsIWidget::CTRL_L | nsIWidget::CTRL_R)) {
mod |= MK_CONTROL;
}
if (aModifierFlags & (nsIWidget::SHIFT_L | nsIWidget::SHIFT_R)) {
mod |= MK_SHIFT;
}
wParam = MAKEWPARAM(mod, aDelta);
break;
}
case WM_VSCROLL:
case WM_HSCROLL:
lParam = (aAdditionalFlags &
nsIDOMWindowUtils::MOUSESCROLL_WIN_SCROLL_LPARAM_NOT_NULL)
? reinterpret_cast<LPARAM>(target)
: 0;
wParam = aDelta;
break;
default:
return NS_ERROR_INVALID_ARG;
}
// Ensure to make the instance.
GetInstance();
BYTE kbdState[256];
memset(kbdState, 0, sizeof(kbdState));
AutoTArray<KeyPair, 10> keySequence;
WinUtils::SetupKeyModifiersSequence(&keySequence, aModifierFlags,
aNativeMessage);
for (uint32_t i = 0; i < keySequence.Length(); ++i) {
uint8_t key = keySequence[i].mGeneral;
uint8_t keySpecific = keySequence[i].mSpecific;
kbdState[key] = 0x81; // key is down and toggled on if appropriate
if (keySpecific) {
kbdState[keySpecific] = 0x81;
}
}
if (!sInstance->mSynthesizingEvent) {
sInstance->mSynthesizingEvent = new SynthesizingEvent();
}
POINTS pts;
pts.x = static_cast<SHORT>(pt.x);
pts.y = static_cast<SHORT>(pt.y);
return sInstance->mSynthesizingEvent->Synthesize(pts, target, aNativeMessage,
wParam, lParam, kbdState);
}
/* static */
void MouseScrollHandler::InitEvent(nsWindow* aWidget, WidgetGUIEvent& aEvent,
LPARAM* aPoint) {
NS_ENSURE_TRUE_VOID(aWidget);
// If a point is provided, use it; otherwise, get current message point or
// synthetic point
POINTS pointOnScreen;
if (aPoint != nullptr) {
pointOnScreen = MAKEPOINTS(*aPoint);
} else {
pointOnScreen = GetCurrentMessagePos();
}
// InitEvent expects the point to be in window coordinates, so translate the
// point from screen coordinates.
POINT pointOnWindow;
POINTSTOPOINT(pointOnWindow, pointOnScreen);
::ScreenToClient(aWidget->GetWindowHandle(), &pointOnWindow);
LayoutDeviceIntPoint point;
point.x = pointOnWindow.x;
point.y = pointOnWindow.y;
aWidget->InitEvent(aEvent, &point);
}
/* static */
ModifierKeyState MouseScrollHandler::GetModifierKeyState(UINT aMessage) {
ModifierKeyState result;
// Assume the Control key is down if the Elantech touchpad has sent the
// mis-ordered WM_KEYDOWN/WM_MOUSEWHEEL messages. (See the comment in
// MouseScrollHandler::Device::Elantech::HandleKeyMessage().)
if ((aMessage == MOZ_WM_MOUSEVWHEEL || aMessage == WM_MOUSEWHEEL) &&
!result.IsControl() && Device::Elantech::IsZooming()) {
// XXX Do we need to unset MODIFIER_SHIFT, MODIFIER_ALT, MODIFIER_OS too?
// If one of them are true, the default action becomes not zooming.
result.Unset(MODIFIER_ALTGRAPH);
result.Set(MODIFIER_CONTROL);
}
return result;
}
POINT
MouseScrollHandler::ComputeMessagePos(UINT aMessage, WPARAM aWParam,
LPARAM aLParam) {
POINT point;
if (Device::SetPoint::IsGetMessagePosResponseValid(aMessage, aWParam,
aLParam)) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ComputeMessagePos: Using ::GetCursorPos()"));
::GetCursorPos(&point);
} else {
POINTS pts = GetCurrentMessagePos();
point.x = pts.x;
point.y = pts.y;
}
return point;
}
void MouseScrollHandler::ProcessNativeMouseWheelMessage(nsWindow* aWidget,
UINT aMessage,
WPARAM aWParam,
LPARAM aLParam) {
if (SynthesizingEvent::IsSynthesizing()) {
mSynthesizingEvent->NativeMessageReceived(aWidget, aMessage, aWParam,
aLParam);
}
POINT point = ComputeMessagePos(aMessage, aWParam, aLParam);
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: aWidget=%p, "
"aMessage=%s, wParam=0x%08zX, lParam=0x%08" PRIXLPTR
", point: { x=%ld, y=%ld }",
aWidget,
aMessage == WM_MOUSEWHEEL ? "WM_MOUSEWHEEL"
: aMessage == WM_MOUSEHWHEEL ? "WM_MOUSEHWHEEL"
: aMessage == WM_VSCROLL ? "WM_VSCROLL"
: "WM_HSCROLL",
aWParam, aLParam, point.x, point.y));
MaybeLogKeyState();
HWND underCursorWnd = ::WindowFromPoint(point);
if (!underCursorWnd) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: "
"No window is not found under the cursor"));
return;
}
if (Device::Elantech::IsPinchHackNeeded() &&
Device::Elantech::IsHelperWindow(underCursorWnd)) {
// The Elantech driver places a window right underneath the cursor
// when sending a WM_MOUSEWHEEL event to us as part of a pinch-to-zoom
// gesture. We detect that here, and search for our window that would
// be beneath the cursor if that window wasn't there.
underCursorWnd = WinUtils::FindOurWindowAtPoint(point);
if (!underCursorWnd) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: "
"Our window is not found under the Elantech helper window"));
return;
}
}
// Handle most cases first. If the window under mouse cursor is our window
// except plugin window (MozillaWindowClass), we should handle the message
// on the window.
if (WinUtils::IsOurProcessWindow(underCursorWnd)) {
nsWindow* destWindow = WinUtils::GetNSWindowPtr(underCursorWnd);
if (!destWindow) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: "
"Found window under the cursor isn't managed by nsWindow..."));
HWND wnd = ::GetParent(underCursorWnd);
for (; wnd; wnd = ::GetParent(wnd)) {
destWindow = WinUtils::GetNSWindowPtr(wnd);
if (destWindow) {
break;
}
}
if (!wnd) {
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: Our window which is "
"managed by nsWindow is not found under the cursor"));
return;
}
}
MOZ_ASSERT(destWindow, "destWindow must not be NULL");
// Some odd touchpad utils sets focus to window under the mouse cursor.
// this emulates the odd behavior for debug.
if (mUserPrefs.ShouldEmulateToMakeWindowUnderCursorForeground() &&
(aMessage == WM_MOUSEWHEEL || aMessage == WM_MOUSEHWHEEL) &&
::GetForegroundWindow() != destWindow->GetWindowHandle()) {
::SetForegroundWindow(destWindow->GetWindowHandle());
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: Succeeded, "
"Posting internal message to an nsWindow (%p)...",
destWindow));
mIsWaitingInternalMessage = true;
UINT internalMessage = WinUtils::GetInternalMessage(aMessage);
::PostMessage(destWindow->GetWindowHandle(), internalMessage, aWParam,
aLParam);
return;
}
// If the window under cursor is not in our process, it means:
// 1. The window may be a plugin window (GeckoPluginWindow or its descendant).
// 2. The window may be another application's window.
HWND pluginWnd = WinUtils::FindOurProcessWindow(underCursorWnd);
if (!pluginWnd) {
// If there is no plugin window in ancestors of the window under cursor,
// the window is for another applications (case 2).
// We don't need to handle this message.
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: "
"Our window is not found under the cursor"));
return;
}
// If the window is a part of plugin, we should post the message to it.
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeMouseWheelMessage: Succeeded, "
"Redirecting the message to a window which is a plugin child window"));
::PostMessage(underCursorWnd, aMessage, aWParam, aLParam);
}
bool MouseScrollHandler::ProcessNativeScrollMessage(nsWindow* aWidget,
UINT aMessage,
WPARAM aWParam,
LPARAM aLParam) {
if (aLParam || mUserPrefs.IsScrollMessageHandledAsWheelMessage()) {
// Scroll message generated by Thinkpad Trackpoint Driver or similar
// Treat as a mousewheel message and scroll appropriately
ProcessNativeMouseWheelMessage(aWidget, aMessage, aWParam, aLParam);
// Always consume the scroll message if we try to emulate mouse wheel
// action.
return true;
}
if (SynthesizingEvent::IsSynthesizing()) {
mSynthesizingEvent->NativeMessageReceived(aWidget, aMessage, aWParam,
aLParam);
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::ProcessNativeScrollMessage: aWidget=%p, "
"aMessage=%s, wParam=0x%08zX, lParam=0x%08" PRIXLPTR,
aWidget, aMessage == WM_VSCROLL ? "WM_VSCROLL" : "WM_HSCROLL",
aWParam, aLParam));
// Scroll message generated by external application
WidgetContentCommandEvent commandEvent(true, eContentCommandScroll, aWidget);
commandEvent.mScroll.mIsHorizontal = (aMessage == WM_HSCROLL);
switch (LOWORD(aWParam)) {
case SB_LINEUP: // SB_LINELEFT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Line;
commandEvent.mScroll.mAmount = -1;
break;
case SB_LINEDOWN: // SB_LINERIGHT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Line;
commandEvent.mScroll.mAmount = 1;
break;
case SB_PAGEUP: // SB_PAGELEFT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Page;
commandEvent.mScroll.mAmount = -1;
break;
case SB_PAGEDOWN: // SB_PAGERIGHT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Page;
commandEvent.mScroll.mAmount = 1;
break;
case SB_TOP: // SB_LEFT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Whole;
commandEvent.mScroll.mAmount = -1;
break;
case SB_BOTTOM: // SB_RIGHT
commandEvent.mScroll.mUnit =
WidgetContentCommandEvent::eCmdScrollUnit_Whole;
commandEvent.mScroll.mAmount = 1;
break;
default:
return false;
}
// XXX If this is a plugin window, we should dispatch the event from
// parent window.
aWidget->DispatchContentCommandEvent(&commandEvent);
return true;
}
void MouseScrollHandler::HandleMouseWheelMessage(nsWindow* aWidget,
UINT aMessage, WPARAM aWParam,
LPARAM aLParam) {
MOZ_ASSERT((aMessage == MOZ_WM_MOUSEVWHEEL || aMessage == MOZ_WM_MOUSEHWHEEL),
"HandleMouseWheelMessage must be called with "
"MOZ_WM_MOUSEVWHEEL or MOZ_WM_MOUSEHWHEEL");
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleMouseWheelMessage: aWidget=%p, "
"aMessage=MOZ_WM_MOUSE%sWHEEL, aWParam=0x%08zX, aLParam=0x%08" PRIXLPTR,
aWidget, aMessage == MOZ_WM_MOUSEVWHEEL ? "V" : "H", aWParam, aLParam));
mIsWaitingInternalMessage = false;
// If it's not allowed to cache system settings, we need to reset the cache
// before handling the mouse wheel message.
mSystemSettings.TrustedScrollSettingsDriver();
EventInfo eventInfo(aWidget, WinUtils::GetNativeMessage(aMessage), aWParam,
aLParam);
if (!eventInfo.CanDispatchWheelEvent()) {
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleMouseWheelMessage: Cannot dispatch the events"));
mLastEventInfo.ResetTransaction();
return;
}
// Discard the remaining delta if current wheel message and last one are
// received by different window or to scroll different direction or
// different unit scroll. Furthermore, if the last event was too old.
if (!mLastEventInfo.CanContinueTransaction(eventInfo)) {
mLastEventInfo.ResetTransaction();
}
mLastEventInfo.RecordEvent(eventInfo);
ModifierKeyState modKeyState = GetModifierKeyState(aMessage);
// Grab the widget, it might be destroyed by a DOM event handler.
RefPtr<nsWindow> kungFuDethGrip(aWidget);
WidgetWheelEvent wheelEvent(true, eWheel, aWidget);
if (mLastEventInfo.InitWheelEvent(aWidget, wheelEvent, modKeyState,
aLParam)) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleMouseWheelMessage: dispatching "
"eWheel event"));
aWidget->DispatchWheelEvent(&wheelEvent);
if (aWidget->Destroyed()) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleMouseWheelMessage: The window was destroyed "
"by eWheel event"));
mLastEventInfo.ResetTransaction();
return;
}
} else {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleMouseWheelMessage: eWheel event is not "
"dispatched"));
}
}
void MouseScrollHandler::HandleScrollMessageAsMouseWheelMessage(
nsWindow* aWidget, UINT aMessage, WPARAM aWParam, LPARAM aLParam) {
MOZ_ASSERT((aMessage == MOZ_WM_VSCROLL || aMessage == MOZ_WM_HSCROLL),
"HandleScrollMessageAsMouseWheelMessage must be called with "
"MOZ_WM_VSCROLL or MOZ_WM_HSCROLL");
mIsWaitingInternalMessage = false;
ModifierKeyState modKeyState = GetModifierKeyState(aMessage);
WidgetWheelEvent wheelEvent(true, eWheel, aWidget);
double& delta =
(aMessage == MOZ_WM_VSCROLL) ? wheelEvent.mDeltaY : wheelEvent.mDeltaX;
int32_t& lineOrPageDelta = (aMessage == MOZ_WM_VSCROLL)
? wheelEvent.mLineOrPageDeltaY
: wheelEvent.mLineOrPageDeltaX;
delta = 1.0;
lineOrPageDelta = 1;
switch (LOWORD(aWParam)) {
case SB_PAGEUP:
delta = -1.0;
lineOrPageDelta = -1;
[[fallthrough]];
case SB_PAGEDOWN:
wheelEvent.mDeltaMode = dom::WheelEvent_Binding::DOM_DELTA_PAGE;
break;
case SB_LINEUP:
delta = -1.0;
lineOrPageDelta = -1;
[[fallthrough]];
case SB_LINEDOWN:
wheelEvent.mDeltaMode = dom::WheelEvent_Binding::DOM_DELTA_LINE;
break;
default:
return;
}
modKeyState.InitInputEvent(wheelEvent);
// Current mouse position may not be same as when the original message
// is received. However, this data is not available with the original
// message, which is why nullptr is passed in. We need to know the actual
// mouse cursor position when the original message was received.
InitEvent(aWidget, wheelEvent, nullptr);
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::HandleScrollMessageAsMouseWheelMessage: aWidget=%p, "
"aMessage=MOZ_WM_%sSCROLL, aWParam=0x%08zX, aLParam=0x%08" PRIXLPTR ", "
"wheelEvent { mRefPoint: { x: %d, y: %d }, mDeltaX: %f, mDeltaY: %f, "
"mLineOrPageDeltaX: %d, mLineOrPageDeltaY: %d, "
"isShift: %s, isControl: %s, isAlt: %s, isMeta: %s }",
aWidget, (aMessage == MOZ_WM_VSCROLL) ? "V" : "H", aWParam, aLParam,
wheelEvent.mRefPoint.x.value, wheelEvent.mRefPoint.y.value,
wheelEvent.mDeltaX, wheelEvent.mDeltaY, wheelEvent.mLineOrPageDeltaX,
wheelEvent.mLineOrPageDeltaY, GetBoolName(wheelEvent.IsShift()),
GetBoolName(wheelEvent.IsControl()), GetBoolName(wheelEvent.IsAlt()),
GetBoolName(wheelEvent.IsMeta())));
aWidget->DispatchWheelEvent(&wheelEvent);
}
/******************************************************************************
*
* EventInfo
*
******************************************************************************/
MouseScrollHandler::EventInfo::EventInfo(nsWindow* aWidget, UINT aMessage,
WPARAM aWParam, LPARAM aLParam) {
MOZ_ASSERT(
aMessage == WM_MOUSEWHEEL || aMessage == WM_MOUSEHWHEEL,
"EventInfo must be initialized with WM_MOUSEWHEEL or WM_MOUSEHWHEEL");
MouseScrollHandler::GetInstance()->mSystemSettings.Init();
mIsVertical = (aMessage == WM_MOUSEWHEEL);
mIsPage =
MouseScrollHandler::sInstance->mSystemSettings.IsPageScroll(mIsVertical);
mDelta = (short)HIWORD(aWParam);
mWnd = aWidget->GetWindowHandle();
mTimeStamp = TimeStamp::Now();
}
bool MouseScrollHandler::EventInfo::CanDispatchWheelEvent() const {
if (!GetScrollAmount()) {
// XXX I think that we should dispatch mouse wheel events even if the
// operation will not scroll because the wheel operation really happened
// and web application may want to handle the event for non-scroll action.
return false;
}
return (mDelta != 0);
}
int32_t MouseScrollHandler::EventInfo::GetScrollAmount() const {
if (mIsPage) {
return 1;
}
return MouseScrollHandler::sInstance->mSystemSettings.GetScrollAmount(
mIsVertical);
}
/******************************************************************************
*
* LastEventInfo
*
******************************************************************************/
bool MouseScrollHandler::LastEventInfo::CanContinueTransaction(
const EventInfo& aNewEvent) {
int32_t timeout = MouseScrollHandler::sInstance->mUserPrefs
.GetMouseScrollTransactionTimeout();
return !mWnd ||
(mWnd == aNewEvent.GetWindowHandle() &&
IsPositive() == aNewEvent.IsPositive() &&
mIsVertical == aNewEvent.IsVertical() &&
mIsPage == aNewEvent.IsPage() &&
(timeout < 0 || TimeStamp::Now() - mTimeStamp <=
TimeDuration::FromMilliseconds(timeout)));
}
void MouseScrollHandler::LastEventInfo::ResetTransaction() {
if (!mWnd) {
return;
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::LastEventInfo::ResetTransaction()"));
mWnd = nullptr;
mAccumulatedDelta = 0;
}
void MouseScrollHandler::LastEventInfo::RecordEvent(const EventInfo& aEvent) {
mWnd = aEvent.GetWindowHandle();
mDelta = aEvent.GetNativeDelta();
mIsVertical = aEvent.IsVertical();
mIsPage = aEvent.IsPage();
mTimeStamp = TimeStamp::Now();
}
/* static */
int32_t MouseScrollHandler::LastEventInfo::RoundDelta(double aDelta) {
return (aDelta >= 0) ? (int32_t)floor(aDelta) : (int32_t)ceil(aDelta);
}
bool MouseScrollHandler::LastEventInfo::InitWheelEvent(
nsWindow* aWidget, WidgetWheelEvent& aWheelEvent,
const ModifierKeyState& aModKeyState, LPARAM aLParam) {
MOZ_ASSERT(aWheelEvent.mMessage == eWheel);
if (StaticPrefs::mousewheel_ignore_cursor_position_in_lparam()) {
InitEvent(aWidget, aWheelEvent, nullptr);
} else {
InitEvent(aWidget, aWheelEvent, &aLParam);
}
aModKeyState.InitInputEvent(aWheelEvent);
// Our positive delta value means to bottom or right.
// But positive native delta value means to top or right.
// Use orienter for computing our delta value with native delta value.
int32_t orienter = mIsVertical ? -1 : 1;
aWheelEvent.mDeltaMode = mIsPage ? dom::WheelEvent_Binding::DOM_DELTA_PAGE
: dom::WheelEvent_Binding::DOM_DELTA_LINE;
double ticks = double(mDelta) * orienter / double(WHEEL_DELTA);
if (mIsVertical) {
aWheelEvent.mWheelTicksY = ticks;
} else {
aWheelEvent.mWheelTicksX = ticks;
}
double& delta = mIsVertical ? aWheelEvent.mDeltaY : aWheelEvent.mDeltaX;
int32_t& lineOrPageDelta = mIsVertical ? aWheelEvent.mLineOrPageDeltaY
: aWheelEvent.mLineOrPageDeltaX;
double nativeDeltaPerUnit =
mIsPage ? double(WHEEL_DELTA) : double(WHEEL_DELTA) / GetScrollAmount();
delta = double(mDelta) * orienter / nativeDeltaPerUnit;
mAccumulatedDelta += mDelta;
lineOrPageDelta =
mAccumulatedDelta * orienter / RoundDelta(nativeDeltaPerUnit);
mAccumulatedDelta -=
lineOrPageDelta * orienter * RoundDelta(nativeDeltaPerUnit);
if (aWheelEvent.mDeltaMode != dom::WheelEvent_Binding::DOM_DELTA_LINE) {
// If the scroll delta mode isn't per line scroll, we shouldn't allow to
// override the system scroll speed setting.
aWheelEvent.mAllowToOverrideSystemScrollSpeed = false;
} else if (!MouseScrollHandler::sInstance->mSystemSettings
.IsOverridingSystemScrollSpeedAllowed()) {
// If the system settings are customized by either the user or
// the mouse utility, we shouldn't allow to override the system scroll
// speed setting.
aWheelEvent.mAllowToOverrideSystemScrollSpeed = false;
} else {
// For suppressing too fast scroll, we should ensure that the maximum
// overridden delta value should be less than overridden scroll speed
// with default scroll amount.
double defaultScrollAmount = mIsVertical
? SystemSettings::DefaultScrollLines()
: SystemSettings::DefaultScrollChars();
double maxDelta = WidgetWheelEvent::ComputeOverriddenDelta(
defaultScrollAmount, mIsVertical);
if (maxDelta != defaultScrollAmount) {
double overriddenDelta =
WidgetWheelEvent::ComputeOverriddenDelta(Abs(delta), mIsVertical);
if (overriddenDelta > maxDelta) {
// Suppress to fast scroll since overriding system scroll speed with
// current delta value causes too big delta value.
aWheelEvent.mAllowToOverrideSystemScrollSpeed = false;
}
}
}
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::LastEventInfo::InitWheelEvent: aWidget=%p, "
"aWheelEvent { mRefPoint: { x: %d, y: %d }, mDeltaX: %f, mDeltaY: %f, "
"mLineOrPageDeltaX: %d, mLineOrPageDeltaY: %d, "
"isShift: %s, isControl: %s, isAlt: %s, isMeta: %s, "
"mAllowToOverrideSystemScrollSpeed: %s }, "
"mAccumulatedDelta: %d",
aWidget, aWheelEvent.mRefPoint.x.value, aWheelEvent.mRefPoint.y.value,
aWheelEvent.mDeltaX, aWheelEvent.mDeltaY, aWheelEvent.mLineOrPageDeltaX,
aWheelEvent.mLineOrPageDeltaY, GetBoolName(aWheelEvent.IsShift()),
GetBoolName(aWheelEvent.IsControl()), GetBoolName(aWheelEvent.IsAlt()),
GetBoolName(aWheelEvent.IsMeta()),
GetBoolName(aWheelEvent.mAllowToOverrideSystemScrollSpeed),
mAccumulatedDelta));
return (delta != 0);
}
/******************************************************************************
*
* SystemSettings
*
******************************************************************************/
void MouseScrollHandler::SystemSettings::Init() {
if (mInitialized) {
return;
}
InitScrollLines();
InitScrollChars();
mInitialized = true;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::Init(): initialized, "
"mScrollLines=%d, mScrollChars=%d",
mScrollLines, mScrollChars));
}
bool MouseScrollHandler::SystemSettings::InitScrollLines() {
int32_t oldValue = mInitialized ? mScrollLines : 0;
mIsReliableScrollLines = false;
mScrollLines = MouseScrollHandler::sInstance->mUserPrefs
.GetOverriddenVerticalScrollAmout();
if (mScrollLines >= 0) {
// overridden by the pref.
mIsReliableScrollLines = true;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollLines(): mScrollLines is "
"overridden by the pref: %d",
mScrollLines));
} else if (!::SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &mScrollLines,
0)) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollLines(): "
"::SystemParametersInfo("
"SPI_GETWHEELSCROLLLINES) failed"));
mScrollLines = DefaultScrollLines();
}
if (mScrollLines > WHEEL_DELTA) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollLines(): the result of "
"::SystemParametersInfo(SPI_GETWHEELSCROLLLINES) is too large: %d",
mScrollLines));
// sScrollLines usually equals 3 or 0 (for no scrolling)
// However, if sScrollLines > WHEEL_DELTA, we assume that
// the mouse driver wants a page scroll. The docs state that
// sScrollLines should explicitly equal WHEEL_PAGESCROLL, but
// since some mouse drivers use an arbitrary large number instead,
// we have to handle that as well.
mScrollLines = WHEEL_PAGESCROLL;
}
return oldValue != mScrollLines;
}
bool MouseScrollHandler::SystemSettings::InitScrollChars() {
int32_t oldValue = mInitialized ? mScrollChars : 0;
mIsReliableScrollChars = false;
mScrollChars = MouseScrollHandler::sInstance->mUserPrefs
.GetOverriddenHorizontalScrollAmout();
if (mScrollChars >= 0) {
// overridden by the pref.
mIsReliableScrollChars = true;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollChars(): mScrollChars is "
"overridden by the pref: %d",
mScrollChars));
} else if (!::SystemParametersInfo(SPI_GETWHEELSCROLLCHARS, 0, &mScrollChars,
0)) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollChars(): "
"::SystemParametersInfo("
"SPI_GETWHEELSCROLLCHARS) failed, this is unexpected on Vista or "
"later"));
// XXX Should we use DefaultScrollChars()?
mScrollChars = 1;
}
if (mScrollChars > WHEEL_DELTA) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::SystemSettings::InitScrollChars(): the result of "
"::SystemParametersInfo(SPI_GETWHEELSCROLLCHARS) is too large: %d",
mScrollChars));
// See the comments for the case mScrollLines > WHEEL_DELTA.
mScrollChars = WHEEL_PAGESCROLL;
}
return oldValue != mScrollChars;
}
void MouseScrollHandler::SystemSettings::MarkDirty() {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SystemSettings::MarkDirty(): "
"Marking SystemSettings dirty"));
mInitialized = false;
// When system settings are changed, we should reset current transaction.
MOZ_ASSERT(sInstance,
"Must not be called at initializing MouseScrollHandler");
MouseScrollHandler::sInstance->mLastEventInfo.ResetTransaction();
}
void MouseScrollHandler::SystemSettings::RefreshCache() {
bool isChanged = InitScrollLines();
isChanged = InitScrollChars() || isChanged;
if (!isChanged) {
return;
}
// If the scroll amount is changed, we should reset current transaction.
MOZ_ASSERT(sInstance,
"Must not be called at initializing MouseScrollHandler");
MouseScrollHandler::sInstance->mLastEventInfo.ResetTransaction();
}
void MouseScrollHandler::SystemSettings::TrustedScrollSettingsDriver() {
if (!mInitialized) {
return;
}
// if the cache is initialized with prefs, we don't need to refresh it.
if (mIsReliableScrollLines && mIsReliableScrollChars) {
return;
}
MouseScrollHandler::UserPrefs& userPrefs =
MouseScrollHandler::sInstance->mUserPrefs;
// If system settings cache is disabled, we should always refresh them.
if (!userPrefs.IsSystemSettingCacheEnabled()) {
RefreshCache();
return;
}
// If pref is set to as "always trust the cache", we shouldn't refresh them
// in any environments.
if (userPrefs.IsSystemSettingCacheForciblyEnabled()) {
return;
}
// If SynTP of Synaptics or Apoint of Alps is installed, it may hook
// ::SystemParametersInfo() and returns different value from system settings.
if (Device::SynTP::IsDriverInstalled() ||
Device::Apoint::IsDriverInstalled()) {
RefreshCache();
return;
}
// XXX We're not sure about other touchpad drivers...
}
bool MouseScrollHandler::SystemSettings::
IsOverridingSystemScrollSpeedAllowed() {
return mScrollLines == DefaultScrollLines() &&
mScrollChars == DefaultScrollChars();
}
/******************************************************************************
*
* UserPrefs
*
******************************************************************************/
MouseScrollHandler::UserPrefs::UserPrefs() : mInitialized(false) {
// We need to reset mouse wheel transaction when all of mousewheel related
// prefs are changed.
DebugOnly<nsresult> rv =
Preferences::RegisterPrefixCallback(OnChange, "mousewheel.", this);
MOZ_ASSERT(NS_SUCCEEDED(rv), "Failed to register callback for mousewheel.");
}
MouseScrollHandler::UserPrefs::~UserPrefs() {
DebugOnly<nsresult> rv =
Preferences::UnregisterPrefixCallback(OnChange, "mousewheel.", this);
MOZ_ASSERT(NS_SUCCEEDED(rv), "Failed to unregister callback for mousewheel.");
}
void MouseScrollHandler::UserPrefs::Init() {
if (mInitialized) {
return;
}
mInitialized = true;
mScrollMessageHandledAsWheelMessage =
Preferences::GetBool("mousewheel.emulate_at_wm_scroll", false);
mEnableSystemSettingCache =
Preferences::GetBool("mousewheel.system_settings_cache.enabled", true);
mForceEnableSystemSettingCache = Preferences::GetBool(
"mousewheel.system_settings_cache.force_enabled", false);
mEmulateToMakeWindowUnderCursorForeground = Preferences::GetBool(
"mousewheel.debug.make_window_under_cursor_foreground", false);
mOverriddenVerticalScrollAmount =
Preferences::GetInt("mousewheel.windows.vertical_amount_override", -1);
mOverriddenHorizontalScrollAmount =
Preferences::GetInt("mousewheel.windows.horizontal_amount_override", -1);
mMouseScrollTransactionTimeout = Preferences::GetInt(
"mousewheel.windows.transaction.timeout", DEFAULT_TIMEOUT_DURATION);
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::UserPrefs::Init(): initialized, "
"mScrollMessageHandledAsWheelMessage=%s, "
"mEnableSystemSettingCache=%s, "
"mForceEnableSystemSettingCache=%s, "
"mEmulateToMakeWindowUnderCursorForeground=%s, "
"mOverriddenVerticalScrollAmount=%d, "
"mOverriddenHorizontalScrollAmount=%d, "
"mMouseScrollTransactionTimeout=%d",
GetBoolName(mScrollMessageHandledAsWheelMessage),
GetBoolName(mEnableSystemSettingCache),
GetBoolName(mForceEnableSystemSettingCache),
GetBoolName(mEmulateToMakeWindowUnderCursorForeground),
mOverriddenVerticalScrollAmount, mOverriddenHorizontalScrollAmount,
mMouseScrollTransactionTimeout));
}
void MouseScrollHandler::UserPrefs::MarkDirty() {
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::UserPrefs::MarkDirty(): Marking UserPrefs dirty"));
mInitialized = false;
// Some prefs might override system settings, so, we should mark them dirty.
MouseScrollHandler::sInstance->mSystemSettings.MarkDirty();
// When user prefs for mousewheel are changed, we should reset current
// transaction.
MOZ_ASSERT(sInstance,
"Must not be called at initializing MouseScrollHandler");
MouseScrollHandler::sInstance->mLastEventInfo.ResetTransaction();
}
/******************************************************************************
*
* Device
*
******************************************************************************/
/* static */
bool MouseScrollHandler::Device::GetWorkaroundPref(const char* aPrefName,
bool aValueIfAutomatic) {
if (!aPrefName) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::GetWorkaroundPref(): Failed, aPrefName is "
"NULL"));
return aValueIfAutomatic;
}
int32_t lHackValue = 0;
if (NS_FAILED(Preferences::GetInt(aPrefName, &lHackValue))) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::GetWorkaroundPref(): Preferences::GetInt() "
"failed,"
" aPrefName=\"%s\", aValueIfAutomatic=%s",
aPrefName, GetBoolName(aValueIfAutomatic)));
return aValueIfAutomatic;
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::GetWorkaroundPref(): Succeeded, "
"aPrefName=\"%s\", aValueIfAutomatic=%s, lHackValue=%d",
aPrefName, GetBoolName(aValueIfAutomatic), lHackValue));
switch (lHackValue) {
case 0: // disabled
return false;
case 1: // enabled
return true;
default: // -1: autodetect
return aValueIfAutomatic;
}
}
/* static */
void MouseScrollHandler::Device::Init() {
// FYI: Thinkpad's TrackPoint is Apoint of Alps and UltraNav is SynTP of
// Synaptics. So, those drivers' information should be initialized
// before calling methods of TrackPoint and UltraNav.
SynTP::Init();
Elantech::Init();
Apoint::Init();
sFakeScrollableWindowNeeded = GetWorkaroundPref(
"ui.trackpoint_hack.enabled", (TrackPoint::IsDriverInstalled() ||
UltraNav::IsObsoleteDriverInstalled()));
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Init(): sFakeScrollableWindowNeeded=%s",
GetBoolName(sFakeScrollableWindowNeeded)));
}
/******************************************************************************
*
* Device::SynTP
*
******************************************************************************/
/* static */
void MouseScrollHandler::Device::SynTP::Init() {
if (sInitialized) {
return;
}
sInitialized = true;
sMajorVersion = 0;
sMinorVersion = -1;
wchar_t buf[40];
bool foundKey = WinUtils::GetRegistryKey(
HKEY_LOCAL_MACHINE, L"Software\\Synaptics\\SynTP\\Install",
L"DriverVersion", buf, sizeof buf);
if (!foundKey) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::SynTP::Init(): "
"SynTP driver is not found"));
return;
}
sMajorVersion = wcstol(buf, nullptr, 10);
sMinorVersion = 0;
wchar_t* p = wcschr(buf, L'.');
if (p) {
sMinorVersion = wcstol(p + 1, nullptr, 10);
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::SynTP::Init(): "
"found driver version = %d.%d",
sMajorVersion, sMinorVersion));
}
/******************************************************************************
*
* Device::Elantech
*
******************************************************************************/
/* static */
void MouseScrollHandler::Device::Elantech::Init() {
int32_t version = GetDriverMajorVersion();
bool needsHack = Device::GetWorkaroundPref(
"ui.elantech_gesture_hacks.enabled", version != 0);
sUseSwipeHack = needsHack && version <= 7;
sUsePinchHack = needsHack && version <= 8;
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Elantech::Init(): version=%d, sUseSwipeHack=%s, "
"sUsePinchHack=%s",
version, GetBoolName(sUseSwipeHack), GetBoolName(sUsePinchHack)));
}
/* static */
int32_t MouseScrollHandler::Device::Elantech::GetDriverMajorVersion() {
wchar_t buf[40];
// The driver version is found in one of these two registry keys.
bool foundKey = WinUtils::GetRegistryKey(HKEY_CURRENT_USER,
L"Software\\Elantech\\MainOption",
L"DriverVersion", buf, sizeof buf);
if (!foundKey) {
foundKey =
WinUtils::GetRegistryKey(HKEY_CURRENT_USER, L"Software\\Elantech",
L"DriverVersion", buf, sizeof buf);
}
if (!foundKey) {
return 0;
}
// Assume that the major version number can be found just after a space
// or at the start of the string.
for (wchar_t* p = buf; *p; p++) {
if (*p >= L'0' && *p <= L'9' && (p == buf || *(p - 1) == L' ')) {
return wcstol(p, nullptr, 10);
}
}
return 0;
}
/* static */
bool MouseScrollHandler::Device::Elantech::IsHelperWindow(HWND aWnd) {
// The helper window cannot be distinguished based on its window class, so we
// need to check if it is owned by the helper process, ETDCtrl.exe.
const wchar_t* filenameSuffix = L"\\etdctrl.exe";
const int filenameSuffixLength = 12;
DWORD pid;
::GetWindowThreadProcessId(aWnd, &pid);
HANDLE hProcess = ::OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
if (!hProcess) {
return false;
}
bool result = false;
wchar_t path[256] = {L'\0'};
if (::GetProcessImageFileNameW(hProcess, path, ArrayLength(path))) {
int pathLength = lstrlenW(path);
if (pathLength >= filenameSuffixLength) {
if (lstrcmpiW(path + pathLength - filenameSuffixLength, filenameSuffix) ==
0) {
result = true;
}
}
}
::CloseHandle(hProcess);
return result;
}
/* static */
bool MouseScrollHandler::Device::Elantech::HandleKeyMessage(nsWindow* aWidget,
UINT aMsg,
WPARAM aWParam,
LPARAM aLParam) {
// The Elantech touchpad driver understands three-finger swipe left and
// right gestures, and translates them into Page Up and Page Down key
// events for most applications. For Firefox 3.6, it instead sends
// Alt+Left and Alt+Right to trigger browser back/forward actions. As
// with the Thinkpad Driver hack in nsWindow::Create, the change in
// HWND structure makes Firefox not trigger the driver's heuristics
// any longer.
//
// The Elantech driver actually sends these messages for a three-finger
// swipe right:
//
// WM_KEYDOWN virtual_key = 0xCC or 0xFF ScanCode = 00
// WM_KEYDOWN virtual_key = VK_NEXT ScanCode = 00
// WM_KEYUP virtual_key = VK_NEXT ScanCode = 00
// WM_KEYUP virtual_key = 0xCC or 0xFF ScanCode = 00
//
// Whether 0xCC or 0xFF is sent is suspected to depend on the driver
// version. 7.0.4.12_14Jul09_WHQL, 7.0.5.10, and 7.0.6.0 generate 0xCC.
// 7.0.4.3 from Asus on EeePC generates 0xFF.
//
// On some hardware, IS_VK_DOWN(0xFF) returns true even when Elantech
// messages are not involved, meaning that alone is not enough to
// distinguish the gesture from a regular Page Up or Page Down key press.
// The ScanCode is therefore also tested to detect the gesture.
// We then pretend that we should dispatch "Go Forward" command. Similarly
// for VK_PRIOR and "Go Back" command.
if (sUseSwipeHack && (aWParam == VK_NEXT || aWParam == VK_PRIOR) &&
WinUtils::GetScanCode(aLParam) == 0 &&
(IS_VK_DOWN(0xFF) || IS_VK_DOWN(0xCC))) {
if (aMsg == WM_KEYDOWN) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Elantech::HandleKeyMessage(): Dispatching "
"%s command event",
aWParam == VK_NEXT ? "Forward" : "Back"));
WidgetCommandEvent appCommandEvent(
true, (aWParam == VK_NEXT) ? nsGkAtoms::Forward : nsGkAtoms::Back,
aWidget);
// In this scenario, the coordinate of the event isn't supplied, so pass
// nullptr as an argument to indicate using the coordinate from the last
// available window message.
InitEvent(aWidget, appCommandEvent, nullptr);
aWidget->DispatchWindowEvent(appCommandEvent);
} else {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Elantech::HandleKeyMessage(): Consumed"));
}
return true; // consume the message (doesn't need to dispatch key events)
}
// Version 8 of the Elantech touchpad driver sends these messages for
// zoom gestures:
//
// WM_KEYDOWN virtual_key = 0xCC time = 10
// WM_KEYDOWN virtual_key = VK_CONTROL time = 10
// WM_MOUSEWHEEL time = ::GetTickCount()
// WM_KEYUP virtual_key = VK_CONTROL time = 10
// WM_KEYUP virtual_key = 0xCC time = 10
//
// The result of this is that we process all of the WM_KEYDOWN/WM_KEYUP
// messages first because their timestamps make them appear to have
// been sent before the WM_MOUSEWHEEL message. To work around this,
// we store the current time when we process the WM_KEYUP message and
// assume that any WM_MOUSEWHEEL message with a timestamp before that
// time is one that should be processed as if the Control key was down.
if (sUsePinchHack && aMsg == WM_KEYUP && aWParam == VK_CONTROL &&
::GetMessageTime() == 10) {
// We look only at the bottom 31 bits of the system tick count since
// GetMessageTime returns a LONG, which is signed, so we want values
// that are more easily comparable.
sZoomUntil = ::GetTickCount() & 0x7FFFFFFF;
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Elantech::HandleKeyMessage(): sZoomUntil=%lu",
sZoomUntil));
}
return false;
}
/* static */
void MouseScrollHandler::Device::Elantech::UpdateZoomUntil() {
if (!sZoomUntil) {
return;
}
// For the Elantech Touchpad Zoom Gesture Hack, we should check that the
// system time (32-bit milliseconds) hasn't wrapped around. Otherwise we
// might get into the situation where wheel events for the next 50 days of
// system uptime are assumed to be Ctrl+Wheel events. (It is unlikely that
// we would get into that state, because the system would already need to be
// up for 50 days and the Control key message would need to be processed just
// before the system time overflow and the wheel message just after.)
//
// We also take the chance to reset sZoomUntil if we simply have passed that
// time.
LONG msgTime = ::GetMessageTime();
if ((sZoomUntil >= 0x3fffffffu && DWORD(msgTime) < 0x40000000u) ||
(sZoomUntil < DWORD(msgTime))) {
sZoomUntil = 0;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Elantech::UpdateZoomUntil(): "
"sZoomUntil was reset"));
}
}
/* static */
bool MouseScrollHandler::Device::Elantech::IsZooming() {
// Assume the Control key is down if the Elantech touchpad has sent the
// mis-ordered WM_KEYDOWN/WM_MOUSEWHEEL messages. (See the comment in
// OnKeyUp.)
return (sZoomUntil && static_cast<DWORD>(::GetMessageTime()) < sZoomUntil);
}
/******************************************************************************
*
* Device::Apoint
*
******************************************************************************/
/* static */
void MouseScrollHandler::Device::Apoint::Init() {
if (sInitialized) {
return;
}
sInitialized = true;
sMajorVersion = 0;
sMinorVersion = -1;
wchar_t buf[40];
bool foundKey =
WinUtils::GetRegistryKey(HKEY_LOCAL_MACHINE, L"Software\\Alps\\Apoint",
L"ProductVer", buf, sizeof buf);
if (!foundKey) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Apoint::Init(): "
"Apoint driver is not found"));
return;
}
sMajorVersion = wcstol(buf, nullptr, 10);
sMinorVersion = 0;
wchar_t* p = wcschr(buf, L'.');
if (p) {
sMinorVersion = wcstol(p + 1, nullptr, 10);
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::Apoint::Init(): "
"found driver version = %d.%d",
sMajorVersion, sMinorVersion));
}
/******************************************************************************
*
* Device::TrackPoint
*
******************************************************************************/
/* static */
bool MouseScrollHandler::Device::TrackPoint::IsDriverInstalled() {
if (WinUtils::HasRegistryKey(HKEY_CURRENT_USER,
L"Software\\Lenovo\\TrackPoint")) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::TrackPoint::IsDriverInstalled(): "
"Lenovo's TrackPoint driver is found"));
return true;
}
if (WinUtils::HasRegistryKey(HKEY_CURRENT_USER,
L"Software\\Alps\\Apoint\\TrackPoint")) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::TrackPoint::IsDriverInstalled(): "
"Alps's TrackPoint driver is found"));
}
return false;
}
/******************************************************************************
*
* Device::UltraNav
*
******************************************************************************/
/* static */
bool MouseScrollHandler::Device::UltraNav::IsObsoleteDriverInstalled() {
if (WinUtils::HasRegistryKey(HKEY_CURRENT_USER,
L"Software\\Lenovo\\UltraNav")) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::UltraNav::IsObsoleteDriverInstalled(): "
"Lenovo's UltraNav driver is found"));
return true;
}
bool installed = false;
if (WinUtils::HasRegistryKey(HKEY_CURRENT_USER,
L"Software\\Synaptics\\SynTPEnh\\UltraNavUSB")) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::UltraNav::IsObsoleteDriverInstalled(): "
"Synaptics's UltraNav (USB) driver is found"));
installed = true;
} else if (WinUtils::HasRegistryKey(
HKEY_CURRENT_USER,
L"Software\\Synaptics\\SynTPEnh\\UltraNavPS2")) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::UltraNav::IsObsoleteDriverInstalled(): "
"Synaptics's UltraNav (PS/2) driver is found"));
installed = true;
}
if (!installed) {
return false;
}
int32_t majorVersion = Device::SynTP::GetDriverMajorVersion();
if (!majorVersion) {
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::UltraNav::IsObsoleteDriverInstalled(): "
"Failed to get UltraNav driver version"));
return false;
}
int32_t minorVersion = Device::SynTP::GetDriverMinorVersion();
return majorVersion < 15 || (majorVersion == 15 && minorVersion == 0);
}
/******************************************************************************
*
* Device::SetPoint
*
******************************************************************************/
/* static */
bool MouseScrollHandler::Device::SetPoint::IsGetMessagePosResponseValid(
UINT aMessage, WPARAM aWParam, LPARAM aLParam) {
if (aMessage != WM_MOUSEHWHEEL) {
return false;
}
POINTS pts = MouseScrollHandler::GetCurrentMessagePos();
LPARAM messagePos = MAKELPARAM(pts.x, pts.y);
// XXX We should check whether SetPoint is installed or not by registry.
// SetPoint, Logitech (Logicool) mouse driver, (confirmed with 4.82.11 and
// MX-1100) always sets 0 to the lParam of WM_MOUSEHWHEEL. The driver SENDs
// one message at first time, this time, ::GetMessagePos() works fine.
// Then, we will return 0 (0 means we process it) to the message. Then, the
// driver will POST the same messages continuously during the wheel tilted.
// But ::GetMessagePos() API always returns (0, 0) for them, even if the
// actual mouse cursor isn't 0,0. Therefore, we cannot trust the result of
// ::GetMessagePos API if the sender is SetPoint.
if (!sMightBeUsing && !aLParam && aLParam != messagePos &&
::InSendMessage()) {
sMightBeUsing = true;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::SetPoint::IsGetMessagePosResponseValid(): "
"Might using SetPoint"));
} else if (sMightBeUsing && aLParam != 0 && ::InSendMessage()) {
// The user has changed the mouse from Logitech's to another one (e.g.,
// the user has changed to the touchpad of the notebook.
sMightBeUsing = false;
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScroll::Device::SetPoint::IsGetMessagePosResponseValid(): "
"Might stop using SetPoint"));
}
return (sMightBeUsing && !aLParam && !messagePos);
}
/******************************************************************************
*
* SynthesizingEvent
*
******************************************************************************/
/* static */
bool MouseScrollHandler::SynthesizingEvent::IsSynthesizing() {
return MouseScrollHandler::sInstance &&
MouseScrollHandler::sInstance->mSynthesizingEvent &&
MouseScrollHandler::sInstance->mSynthesizingEvent->mStatus !=
NOT_SYNTHESIZING;
}
nsresult MouseScrollHandler::SynthesizingEvent::Synthesize(
const POINTS& aCursorPoint, HWND aWnd, UINT aMessage, WPARAM aWParam,
LPARAM aLParam, const BYTE (&aKeyStates)[256]) {
MOZ_LOG(
gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SynthesizingEvent::Synthesize(): aCursorPoint: { "
"x: %d, y: %d }, aWnd=0x%p, aMessage=0x%04X, aWParam=0x%08zX, "
"aLParam=0x%08" PRIXLPTR ", IsSynthesized()=%s, mStatus=%s",
aCursorPoint.x, aCursorPoint.y, aWnd, aMessage, aWParam, aLParam,
GetBoolName(IsSynthesizing()), GetStatusName()));
if (IsSynthesizing()) {
return NS_ERROR_NOT_AVAILABLE;
}
::GetKeyboardState(mOriginalKeyState);
// Note that we cannot use ::SetCursorPos() because it works asynchronously.
// We should SEND the message for reducing the possibility of receiving
// unexpected message which were not sent from here.
mCursorPoint = aCursorPoint;
mWnd = aWnd;
mMessage = aMessage;
mWParam = aWParam;
mLParam = aLParam;
memcpy(mKeyState, aKeyStates, sizeof(mKeyState));
::SetKeyboardState(mKeyState);
mStatus = SENDING_MESSAGE;
// Don't assume that aWnd is always managed by nsWindow. It might be
// a plugin window.
::SendMessage(aWnd, aMessage, aWParam, aLParam);
return NS_OK;
}
void MouseScrollHandler::SynthesizingEvent::NativeMessageReceived(
nsWindow* aWidget, UINT aMessage, WPARAM aWParam, LPARAM aLParam) {
if (mStatus == SENDING_MESSAGE && mMessage == aMessage &&
mWParam == aWParam && mLParam == aLParam) {
mStatus = NATIVE_MESSAGE_RECEIVED;
if (aWidget && aWidget->GetWindowHandle() == mWnd) {
return;
}
// Otherwise, the message may not be sent by us.
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SynthesizingEvent::NativeMessageReceived(): "
"aWidget=%p, aWidget->GetWindowHandle()=0x%p, mWnd=0x%p, "
"aMessage=0x%04X, aWParam=0x%08zX, aLParam=0x%08" PRIXLPTR
", mStatus=%s",
aWidget, aWidget ? aWidget->GetWindowHandle() : nullptr, mWnd,
aMessage, aWParam, aLParam, GetStatusName()));
// We failed to receive our sent message, we failed to do the job.
Finish();
return;
}
void MouseScrollHandler::SynthesizingEvent::
NotifyNativeMessageHandlingFinished() {
if (!IsSynthesizing()) {
return;
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SynthesizingEvent::"
"NotifyNativeMessageHandlingFinished(): IsWaitingInternalMessage=%s",
GetBoolName(MouseScrollHandler::IsWaitingInternalMessage())));
if (MouseScrollHandler::IsWaitingInternalMessage()) {
mStatus = INTERNAL_MESSAGE_POSTED;
return;
}
// If the native message handler didn't post our internal message,
// we our job is finished.
// TODO: When we post the message to plugin window, there is remaning job.
Finish();
}
void MouseScrollHandler::SynthesizingEvent::
NotifyInternalMessageHandlingFinished() {
if (!IsSynthesizing()) {
return;
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SynthesizingEvent::"
"NotifyInternalMessageHandlingFinished()"));
Finish();
}
void MouseScrollHandler::SynthesizingEvent::Finish() {
if (!IsSynthesizing()) {
return;
}
MOZ_LOG(gMouseScrollLog, LogLevel::Info,
("MouseScrollHandler::SynthesizingEvent::Finish()"));
// Restore the original key state.
::SetKeyboardState(mOriginalKeyState);
mStatus = NOT_SYNTHESIZING;
}
} // namespace widget
} // namespace mozilla
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