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EventStateManager.cpp
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/Attributes.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventStateManager.h"
#include "mozilla/EventStates.h"
#include "mozilla/IMEStateManager.h"
#include "mozilla/MiscEvents.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/MouseEvents.h"
#include "mozilla/TextComposition.h"
#include "mozilla/TextEvents.h"
#include "mozilla/TouchEvents.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/dom/DragEvent.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/TabChild.h"
#include "mozilla/dom/TabParent.h"
#include "mozilla/dom/UIEvent.h"
#include "ContentEventHandler.h"
#include "IMEContentObserver.h"
#include "WheelHandlingHelper.h"
#include "nsCOMPtr.h"
#include "nsFocusManager.h"
#include "nsIContent.h"
#include "nsIContentInlines.h"
#include "nsIDocument.h"
#include "nsIFrame.h"
#include "nsIWidget.h"
#include "nsPresContext.h"
#include "nsIPresShell.h"
#include "nsGkAtoms.h"
#include "nsIFormControl.h"
#include "nsIComboboxControlFrame.h"
#include "nsIScrollableFrame.h"
#include "nsIDOMHTMLElement.h"
#include "nsIDOMXULControlElement.h"
#include "nsNameSpaceManager.h"
#include "nsIBaseWindow.h"
#include "nsISelection.h"
#include "nsITextControlElement.h"
#include "nsFrameSelection.h"
#include "nsPIDOMWindow.h"
#include "nsPIWindowRoot.h"
#include "nsIWebNavigation.h"
#include "nsIContentViewer.h"
#include "nsFrameManager.h"
#include "nsITabChild.h"
#include "nsPluginFrame.h"
#include "nsMenuPopupFrame.h"
#include "nsIDOMXULElement.h"
#include "nsIDOMKeyEvent.h"
#include "nsIObserverService.h"
#include "nsIDocShell.h"
#include "nsIDOMWheelEvent.h"
#include "nsIDOMUIEvent.h"
#include "nsIMozBrowserFrame.h"
#include "nsSubDocumentFrame.h"
#include "nsLayoutUtils.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsUnicharUtils.h"
#include "nsContentUtils.h"
#include "imgIContainer.h"
#include "nsIProperties.h"
#include "nsISupportsPrimitives.h"
#include "nsServiceManagerUtils.h"
#include "nsITimer.h"
#include "nsFontMetrics.h"
#include "nsIDOMXULDocument.h"
#include "nsIDragService.h"
#include "nsIDragSession.h"
#include "mozilla/dom/DataTransfer.h"
#include "nsContentAreaDragDrop.h"
#ifdef MOZ_XUL
#include "nsTreeBodyFrame.h"
#endif
#include "nsIController.h"
#include "nsICommandParams.h"
#include "mozilla/Services.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/HTMLLabelElement.h"
#include "mozilla/Preferences.h"
#include "mozilla/LookAndFeel.h"
#include "GeckoProfiler.h"
#include "Units.h"
#include "mozilla/layers/APZCTreeManager.h"
#ifdef XP_MACOSX
#import <ApplicationServices/ApplicationServices.h>
#endif
namespace mozilla {
using namespace dom;
//#define DEBUG_DOCSHELL_FOCUS
#define NS_USER_INTERACTION_INTERVAL 5000 // ms
static const LayoutDeviceIntPoint kInvalidRefPoint = LayoutDeviceIntPoint(-1,-1);
static uint32_t gMouseOrKeyboardEventCounter = 0;
static nsITimer* gUserInteractionTimer = nullptr;
static nsITimerCallback* gUserInteractionTimerCallback = nullptr;
static const double kCursorLoadingTimeout = 1000; // ms
static nsWeakFrame gLastCursorSourceFrame;
static TimeStamp gLastCursorUpdateTime;
static inline int32_t
RoundDown(double aDouble)
{
return (aDouble > 0) ? static_cast<int32_t>(floor(aDouble)) :
static_cast<int32_t>(ceil(aDouble));
}
#ifdef DEBUG_DOCSHELL_FOCUS
static void
PrintDocTree(nsIDocShellTreeItem* aParentItem, int aLevel)
{
for (int32_t i=0;i<aLevel;i++) printf(" ");
int32_t childWebshellCount;
aParentItem->GetChildCount(&childWebshellCount);
nsCOMPtr<nsIDocShell> parentAsDocShell(do_QueryInterface(aParentItem));
int32_t type = aParentItem->ItemType();
nsCOMPtr<nsIPresShell> presShell = parentAsDocShell->GetPresShell();
RefPtr<nsPresContext> presContext;
parentAsDocShell->GetPresContext(getter_AddRefs(presContext));
nsCOMPtr<nsIContentViewer> cv;
parentAsDocShell->GetContentViewer(getter_AddRefs(cv));
nsCOMPtr<nsIDOMDocument> domDoc;
if (cv)
cv->GetDOMDocument(getter_AddRefs(domDoc));
nsCOMPtr<nsIDocument> doc = do_QueryInterface(domDoc);
nsCOMPtr<nsIDOMWindow> domwin = doc ? doc->GetWindow() : nullptr;
nsIURI* uri = doc ? doc->GetDocumentURI() : nullptr;
printf("DS %p Type %s Cnt %d Doc %p DW %p EM %p%c",
static_cast<void*>(parentAsDocShell.get()),
type==nsIDocShellTreeItem::typeChrome?"Chrome":"Content",
childWebshellCount, static_cast<void*>(doc.get()),
static_cast<void*>(domwin.get()),
static_cast<void*>(presContext ? presContext->EventStateManager() : nullptr),
uri ? ' ' : '\n');
if (uri) {
nsAutoCString spec;
uri->GetSpec(spec);
printf("\"%s\"\n", spec.get());
}
if (childWebshellCount > 0) {
for (int32_t i = 0; i < childWebshellCount; i++) {
nsCOMPtr<nsIDocShellTreeItem> child;
aParentItem->GetChildAt(i, getter_AddRefs(child));
PrintDocTree(child, aLevel + 1);
}
}
}
static void
PrintDocTreeAll(nsIDocShellTreeItem* aItem)
{
nsCOMPtr<nsIDocShellTreeItem> item = aItem;
for(;;) {
nsCOMPtr<nsIDocShellTreeItem> parent;
item->GetParent(getter_AddRefs(parent));
if (!parent)
break;
item = parent;
}
PrintDocTree(item, 0);
}
#endif
// mask values for ui.key.chromeAccess and ui.key.contentAccess
#define NS_MODIFIER_SHIFT 1
#define NS_MODIFIER_CONTROL 2
#define NS_MODIFIER_ALT 4
#define NS_MODIFIER_META 8
#define NS_MODIFIER_OS 16
/******************************************************************/
/* mozilla::UITimerCallback */
/******************************************************************/
class UITimerCallback final : public nsITimerCallback
{
public:
UITimerCallback() : mPreviousCount(0) {}
NS_DECL_ISUPPORTS
NS_DECL_NSITIMERCALLBACK
private:
~UITimerCallback() {}
uint32_t mPreviousCount;
};
NS_IMPL_ISUPPORTS(UITimerCallback, nsITimerCallback)
// If aTimer is nullptr, this method always sends "user-interaction-inactive"
// notification.
NS_IMETHODIMP
UITimerCallback::Notify(nsITimer* aTimer)
{
nsCOMPtr<nsIObserverService> obs =
mozilla::services::GetObserverService();
if (!obs)
return NS_ERROR_FAILURE;
if ((gMouseOrKeyboardEventCounter == mPreviousCount) || !aTimer) {
gMouseOrKeyboardEventCounter = 0;
obs->NotifyObservers(nullptr, "user-interaction-inactive", nullptr);
if (gUserInteractionTimer) {
gUserInteractionTimer->Cancel();
NS_RELEASE(gUserInteractionTimer);
}
} else {
obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
EventStateManager::UpdateUserActivityTimer();
}
mPreviousCount = gMouseOrKeyboardEventCounter;
return NS_OK;
}
/******************************************************************/
/* mozilla::OverOutElementsWrapper */
/******************************************************************/
OverOutElementsWrapper::OverOutElementsWrapper()
: mLastOverFrame(nullptr)
{
}
OverOutElementsWrapper::~OverOutElementsWrapper()
{
}
NS_IMPL_CYCLE_COLLECTION(OverOutElementsWrapper,
mLastOverElement,
mFirstOverEventElement,
mFirstOutEventElement)
NS_IMPL_CYCLE_COLLECTING_ADDREF(OverOutElementsWrapper)
NS_IMPL_CYCLE_COLLECTING_RELEASE(OverOutElementsWrapper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(OverOutElementsWrapper)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
/******************************************************************/
/* mozilla::EventStateManager */
/******************************************************************/
static uint32_t sESMInstanceCount = 0;
static bool sPointerEventEnabled = false;
uint64_t EventStateManager::sUserInputCounter = 0;
int32_t EventStateManager::sUserInputEventDepth = 0;
bool EventStateManager::sNormalLMouseEventInProcess = false;
EventStateManager* EventStateManager::sActiveESM = nullptr;
nsIDocument* EventStateManager::sMouseOverDocument = nullptr;
nsWeakFrame EventStateManager::sLastDragOverFrame = nullptr;
LayoutDeviceIntPoint EventStateManager::sPreLockPoint = LayoutDeviceIntPoint(0, 0);
LayoutDeviceIntPoint EventStateManager::sLastRefPoint = kInvalidRefPoint;
CSSIntPoint EventStateManager::sLastScreenPoint = CSSIntPoint(0, 0);
LayoutDeviceIntPoint EventStateManager::sSynthCenteringPoint = kInvalidRefPoint;
CSSIntPoint EventStateManager::sLastClientPoint = CSSIntPoint(0, 0);
bool EventStateManager::sIsPointerLocked = false;
// Reference to the pointer locked element.
nsWeakPtr EventStateManager::sPointerLockedElement;
// Reference to the document which requested pointer lock.
nsWeakPtr EventStateManager::sPointerLockedDoc;
nsCOMPtr<nsIContent> EventStateManager::sDragOverContent = nullptr;
TimeStamp EventStateManager::sLatestUserInputStart;
TimeStamp EventStateManager::sHandlingInputStart;
EventStateManager::WheelPrefs*
EventStateManager::WheelPrefs::sInstance = nullptr;
bool EventStateManager::WheelPrefs::sWheelEventsEnabledOnPlugins = true;
EventStateManager::DeltaAccumulator*
EventStateManager::DeltaAccumulator::sInstance = nullptr;
EventStateManager::EventStateManager()
: mLockCursor(0)
, mLastFrameConsumedSetCursor(false)
, mCurrentTarget(nullptr)
// init d&d gesture state machine variables
, mGestureDownPoint(0,0)
, mPresContext(nullptr)
, mLClickCount(0)
, mMClickCount(0)
, mRClickCount(0)
, mInTouchDrag(false)
, m_haveShutdown(false)
{
if (sESMInstanceCount == 0) {
gUserInteractionTimerCallback = new UITimerCallback();
if (gUserInteractionTimerCallback)
NS_ADDREF(gUserInteractionTimerCallback);
UpdateUserActivityTimer();
}
++sESMInstanceCount;
static bool sAddedPointerEventEnabled = false;
if (!sAddedPointerEventEnabled) {
Preferences::AddBoolVarCache(&sPointerEventEnabled,
"dom.w3c_pointer_events.enabled", false);
sAddedPointerEventEnabled = true;
}
}
nsresult
EventStateManager::UpdateUserActivityTimer()
{
if (!gUserInteractionTimerCallback)
return NS_OK;
if (!gUserInteractionTimer)
CallCreateInstance("@mozilla.org/timer;1", &gUserInteractionTimer);
if (gUserInteractionTimer) {
gUserInteractionTimer->InitWithCallback(gUserInteractionTimerCallback,
NS_USER_INTERACTION_INTERVAL,
nsITimer::TYPE_ONE_SHOT);
}
return NS_OK;
}
nsresult
EventStateManager::Init()
{
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (!observerService)
return NS_ERROR_FAILURE;
observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID, true);
if (sESMInstanceCount == 1) {
Prefs::Init();
}
return NS_OK;
}
EventStateManager::~EventStateManager()
{
ReleaseCurrentIMEContentObserver();
if (sActiveESM == this) {
sActiveESM = nullptr;
}
if (Prefs::ClickHoldContextMenu())
KillClickHoldTimer();
if (mDocument == sMouseOverDocument)
sMouseOverDocument = nullptr;
--sESMInstanceCount;
if(sESMInstanceCount == 0) {
WheelTransaction::Shutdown();
if (gUserInteractionTimerCallback) {
gUserInteractionTimerCallback->Notify(nullptr);
NS_RELEASE(gUserInteractionTimerCallback);
}
if (gUserInteractionTimer) {
gUserInteractionTimer->Cancel();
NS_RELEASE(gUserInteractionTimer);
}
Prefs::Shutdown();
WheelPrefs::Shutdown();
DeltaAccumulator::Shutdown();
}
if (sDragOverContent && sDragOverContent->OwnerDoc() == mDocument) {
sDragOverContent = nullptr;
}
if (!m_haveShutdown) {
Shutdown();
// Don't remove from Observer service in Shutdown because Shutdown also
// gets called from xpcom shutdown observer. And we don't want to remove
// from the service in that case.
nsCOMPtr<nsIObserverService> observerService =
mozilla::services::GetObserverService();
if (observerService) {
observerService->RemoveObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID);
}
}
}
nsresult
EventStateManager::Shutdown()
{
m_haveShutdown = true;
return NS_OK;
}
NS_IMETHODIMP
EventStateManager::Observe(nsISupports* aSubject,
const char* aTopic,
const char16_t *someData)
{
if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
Shutdown();
}
return NS_OK;
}
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(EventStateManager)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIObserver)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(EventStateManager)
NS_IMPL_CYCLE_COLLECTING_RELEASE(EventStateManager)
NS_IMPL_CYCLE_COLLECTION(EventStateManager,
mCurrentTargetContent,
mGestureDownContent,
mGestureDownFrameOwner,
mLastLeftMouseDownContent,
mLastMiddleMouseDownContent,
mLastRightMouseDownContent,
mActiveContent,
mHoverContent,
mURLTargetContent,
mMouseEnterLeaveHelper,
mPointersEnterLeaveHelper,
mDocument,
mIMEContentObserver,
mAccessKeys)
void
EventStateManager::ReleaseCurrentIMEContentObserver()
{
if (mIMEContentObserver) {
mIMEContentObserver->DisconnectFromEventStateManager();
}
mIMEContentObserver = nullptr;
}
void
EventStateManager::OnStartToObserveContent(
IMEContentObserver* aIMEContentObserver)
{
if (mIMEContentObserver == aIMEContentObserver) {
return;
}
ReleaseCurrentIMEContentObserver();
mIMEContentObserver = aIMEContentObserver;
}
void
EventStateManager::OnStopObservingContent(
IMEContentObserver* aIMEContentObserver)
{
aIMEContentObserver->DisconnectFromEventStateManager();
NS_ENSURE_TRUE_VOID(mIMEContentObserver == aIMEContentObserver);
mIMEContentObserver = nullptr;
}
void
EventStateManager::TryToFlushPendingNotificationsToIME()
{
if (mIMEContentObserver) {
mIMEContentObserver->TryToFlushPendingNotifications();
}
}
static bool
IsMessageMouseUserActivity(EventMessage aMessage)
{
return aMessage == eMouseMove ||
aMessage == eMouseUp ||
aMessage == eMouseDown ||
aMessage == eMouseAuxClick ||
aMessage == eMouseDoubleClick ||
aMessage == eMouseClick ||
aMessage == eMouseActivate ||
aMessage == eMouseLongTap;
}
static bool
IsMessageGamepadUserActivity(EventMessage aMessage)
{
#ifndef MOZ_GAMEPAD
return false;
#else
return aMessage == eGamepadButtonDown ||
aMessage == eGamepadButtonUp ||
aMessage == eGamepadAxisMove;
#endif
}
nsresult
EventStateManager::PreHandleEvent(nsPresContext* aPresContext,
WidgetEvent* aEvent,
nsIFrame* aTargetFrame,
nsIContent* aTargetContent,
nsEventStatus* aStatus)
{
NS_ENSURE_ARG_POINTER(aStatus);
NS_ENSURE_ARG(aPresContext);
if (!aEvent) {
NS_ERROR("aEvent is null. This should never happen.");
return NS_ERROR_NULL_POINTER;
}
NS_WARNING_ASSERTION(
!aTargetFrame || !aTargetFrame->GetContent() ||
aTargetFrame->GetContent() == aTargetContent ||
aTargetFrame->GetContent()->GetFlattenedTreeParent() == aTargetContent ||
aTargetFrame->IsGeneratedContentFrame(),
"aTargetFrame should be related with aTargetContent");
#if DEBUG
if (aTargetFrame && aTargetFrame->IsGeneratedContentFrame()) {
nsCOMPtr<nsIContent> targetContent;
aTargetFrame->GetContentForEvent(aEvent, getter_AddRefs(targetContent));
MOZ_ASSERT(aTargetContent == targetContent,
"Unexpected target for generated content frame!");
}
#endif
mCurrentTarget = aTargetFrame;
mCurrentTargetContent = nullptr;
// Do not take account eMouseEnterIntoWidget/ExitFromWidget so that loading
// a page when user is not active doesn't change the state to active.
WidgetMouseEvent* mouseEvent = aEvent->AsMouseEvent();
if (aEvent->IsTrusted() &&
((mouseEvent && mouseEvent->IsReal() &&
IsMessageMouseUserActivity(mouseEvent->mMessage)) ||
aEvent->mClass == eWheelEventClass ||
aEvent->mClass == ePointerEventClass ||
aEvent->mClass == eTouchEventClass ||
aEvent->mClass == eKeyboardEventClass ||
IsMessageGamepadUserActivity(aEvent->mMessage))) {
if (gMouseOrKeyboardEventCounter == 0) {
nsCOMPtr<nsIObserverService> obs =
mozilla::services::GetObserverService();
if (obs) {
obs->NotifyObservers(nullptr, "user-interaction-active", nullptr);
UpdateUserActivityTimer();
}
}
++gMouseOrKeyboardEventCounter;
nsCOMPtr<nsINode> node = do_QueryInterface(aTargetContent);
if (node &&
(aEvent->mMessage == eKeyUp || aEvent->mMessage == eMouseUp ||
aEvent->mMessage == eWheel || aEvent->mMessage == eTouchEnd ||
aEvent->mMessage == ePointerUp)) {
nsIDocument* doc = node->OwnerDoc();
while (doc && !doc->UserHasInteracted()) {
doc->SetUserHasInteracted(true);
doc = nsContentUtils::IsChildOfSameType(doc) ?
doc->GetParentDocument() : nullptr;
}
}
}
WheelTransaction::OnEvent(aEvent);
// Focus events don't necessarily need a frame.
if (!mCurrentTarget && !aTargetContent) {
NS_ERROR("mCurrentTarget and aTargetContent are null");
return NS_ERROR_NULL_POINTER;
}
#ifdef DEBUG
if (aEvent->HasDragEventMessage() && sIsPointerLocked) {
NS_ASSERTION(sIsPointerLocked,
"sIsPointerLocked is true. Drag events should be suppressed when "
"the pointer is locked.");
}
#endif
// Store last known screenPoint and clientPoint so pointer lock
// can use these values as constants.
if (aEvent->IsTrusted() &&
((mouseEvent && mouseEvent->IsReal()) ||
aEvent->mClass == eWheelEventClass) &&
!sIsPointerLocked) {
sLastScreenPoint =
Event::GetScreenCoords(aPresContext, aEvent, aEvent->mRefPoint);
sLastClientPoint =
Event::GetClientCoords(aPresContext, aEvent, aEvent->mRefPoint,
CSSIntPoint(0, 0));
}
*aStatus = nsEventStatus_eIgnore;
if (aEvent->mClass == eQueryContentEventClass) {
HandleQueryContentEvent(aEvent->AsQueryContentEvent());
return NS_OK;
}
WidgetTouchEvent* touchEvent = aEvent->AsTouchEvent();
if (touchEvent && mInTouchDrag) {
if (touchEvent->mMessage == eTouchMove) {
GenerateDragGesture(aPresContext, touchEvent);
} else {
mInTouchDrag = false;
StopTrackingDragGesture();
}
}
switch (aEvent->mMessage) {
case eContextMenu:
if (sIsPointerLocked) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
break;
case eMouseTouchDrag:
mInTouchDrag = true;
BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
break;
case eMouseDown: {
switch (mouseEvent->button) {
case WidgetMouseEvent::eLeftButton:
BeginTrackingDragGesture(aPresContext, mouseEvent, aTargetFrame);
mLClickCount = mouseEvent->mClickCount;
SetClickCount(mouseEvent, aStatus);
sNormalLMouseEventInProcess = true;
break;
case WidgetMouseEvent::eMiddleButton:
mMClickCount = mouseEvent->mClickCount;
SetClickCount(mouseEvent, aStatus);
break;
case WidgetMouseEvent::eRightButton:
mRClickCount = mouseEvent->mClickCount;
SetClickCount(mouseEvent, aStatus);
break;
}
break;
}
case eMouseUp: {
switch (mouseEvent->button) {
case WidgetMouseEvent::eLeftButton:
if (Prefs::ClickHoldContextMenu()) {
KillClickHoldTimer();
}
StopTrackingDragGesture();
sNormalLMouseEventInProcess = false;
// then fall through...
MOZ_FALLTHROUGH;
case WidgetMouseEvent::eRightButton:
case WidgetMouseEvent::eMiddleButton:
SetClickCount(mouseEvent, aStatus);
break;
}
break;
}
case eMouseEnterIntoWidget:
// In some cases on e10s eMouseEnterIntoWidget
// event was sent twice into child process of content.
// (From specific widget code (sending is not permanent) and
// from ESM::DispatchMouseOrPointerEvent (sending is permanent)).
// Flag mNoCrossProcessBoundaryForwarding helps to
// suppress sending accidental event from widget code.
aEvent->StopCrossProcessForwarding();
break;
case eMouseExitFromWidget:
// If this is a remote frame, we receive eMouseExitFromWidget from the
// parent the mouse exits our content. Since the parent may update the
// cursor while the mouse is outside our frame, and since PuppetWidget
// caches the current cursor internally, re-entering our content (say from
// over a window edge) wont update the cursor if the cached value and the
// current cursor match. So when the mouse exits a remote frame, clear the
// cached widget cursor so a proper update will occur when the mouse
// re-enters.
if (XRE_IsContentProcess()) {
ClearCachedWidgetCursor(mCurrentTarget);
}
// Flag helps to suppress double event sending into process of content.
// For more information see comment above, at eMouseEnterIntoWidget case.
aEvent->StopCrossProcessForwarding();
// If the event is not a top-level window exit, then it's not
// really an exit --- we may have traversed widget boundaries but
// we're still in our toplevel window.
if (mouseEvent->mExitFrom != WidgetMouseEvent::eTopLevel) {
// Treat it as a synthetic move so we don't generate spurious
// "exit" or "move" events. Any necessary "out" or "over" events
// will be generated by GenerateMouseEnterExit
mouseEvent->mMessage = eMouseMove;
mouseEvent->mReason = WidgetMouseEvent::eSynthesized;
// then fall through...
} else {
if (sPointerEventEnabled) {
// We should synthetize corresponding pointer events
GeneratePointerEnterExit(ePointerLeave, mouseEvent);
}
GenerateMouseEnterExit(mouseEvent);
//This is a window level mouse exit event and should stop here
aEvent->mMessage = eVoidEvent;
break;
}
MOZ_FALLTHROUGH;
case eMouseMove:
case ePointerDown:
case ePointerMove: {
// on the Mac, GenerateDragGesture() may not return until the drag
// has completed and so |aTargetFrame| may have been deleted (moving
// a bookmark, for example). If this is the case, however, we know
// that ClearFrameRefs() has been called and it cleared out
// |mCurrentTarget|. As a result, we should pass |mCurrentTarget|
// into UpdateCursor().
GenerateDragGesture(aPresContext, mouseEvent);
UpdateCursor(aPresContext, aEvent, mCurrentTarget, aStatus);
GenerateMouseEnterExit(mouseEvent);
// Flush pending layout changes, so that later mouse move events
// will go to the right nodes.
FlushPendingEvents(aPresContext);
break;
}
case ePointerGotCapture:
GenerateMouseEnterExit(mouseEvent);
break;
case eDragStart:
if (Prefs::ClickHoldContextMenu()) {
// an external drag gesture event came in, not generated internally
// by Gecko. Make sure we get rid of the click-hold timer.
KillClickHoldTimer();
}
break;
case eDragOver:
// Send the enter/exit events before eDrop.
GenerateDragDropEnterExit(aPresContext, aEvent->AsDragEvent());
break;
case eKeyPress:
{
WidgetKeyboardEvent* keyEvent = aEvent->AsKeyboardEvent();
int32_t modifierMask = 0;
if (keyEvent->IsShift())
modifierMask |= NS_MODIFIER_SHIFT;
if (keyEvent->IsControl())
modifierMask |= NS_MODIFIER_CONTROL;
if (keyEvent->IsAlt())
modifierMask |= NS_MODIFIER_ALT;
if (keyEvent->IsMeta())
modifierMask |= NS_MODIFIER_META;
if (keyEvent->IsOS())
modifierMask |= NS_MODIFIER_OS;
// Prevent keyboard scrolling while an accesskey modifier is in use.
if (modifierMask) {
bool matchesContentAccessKey = (modifierMask == Prefs::ContentAccessModifierMask());
if (modifierMask == Prefs::ChromeAccessModifierMask() ||
matchesContentAccessKey) {
AutoTArray<uint32_t, 10> accessCharCodes;
keyEvent->GetAccessKeyCandidates(accessCharCodes);
if (HandleAccessKey(keyEvent, aPresContext, accessCharCodes,
modifierMask, matchesContentAccessKey)) {
*aStatus = nsEventStatus_eConsumeNoDefault;
}
}
}
}
// then fall through...
MOZ_FALLTHROUGH;
case eBeforeKeyDown:
case eKeyDown:
case eAfterKeyDown:
case eBeforeKeyUp:
case eKeyUp:
case eAfterKeyUp:
{
nsIContent* content = GetFocusedContent();
if (content)
mCurrentTargetContent = content;
// NOTE: Don't refer TextComposition::IsComposing() since UI Events
// defines that KeyboardEvent.isComposing is true when it's
// dispatched after compositionstart and compositionend.
// TextComposition::IsComposing() is false even before
// compositionend if there is no composing string.
// And also don't expose other document's composition state.
// A native IME context is typically shared by multiple documents.
// So, don't use GetTextCompositionFor(nsIWidget*) here.
RefPtr<TextComposition> composition =
IMEStateManager::GetTextCompositionFor(aPresContext);
aEvent->AsKeyboardEvent()->mIsComposing = !!composition;
}
break;
case eWheel:
case eWheelOperationStart:
case eWheelOperationEnd:
{
NS_ASSERTION(aEvent->IsTrusted(),
"Untrusted wheel event shouldn't be here");
nsIContent* content = GetFocusedContent();
if (content) {
mCurrentTargetContent = content;
}
if (aEvent->mMessage != eWheel) {
break;
}
WidgetWheelEvent* wheelEvent = aEvent->AsWheelEvent();
WheelPrefs::GetInstance()->ApplyUserPrefsToDelta(wheelEvent);
// If we won't dispatch a DOM event for this event, nothing to do anymore.
if (!wheelEvent->IsAllowedToDispatchDOMEvent()) {
break;
}
// Init lineOrPageDelta values for line scroll events for some devices
// on some platforms which might dispatch wheel events which don't have
// lineOrPageDelta values. And also, if delta values are customized by
// prefs, this recomputes them.
DeltaAccumulator::GetInstance()->
InitLineOrPageDelta(aTargetFrame, this, wheelEvent);
}
break;
case eSetSelection:
IMEStateManager::HandleSelectionEvent(aPresContext, GetFocusedContent(),
aEvent->AsSelectionEvent());
break;
case eContentCommandCut:
case eContentCommandCopy:
case eContentCommandPaste:
case eContentCommandDelete:
case eContentCommandUndo:
case eContentCommandRedo:
case eContentCommandPasteTransferable:
case eContentCommandLookUpDictionary:
DoContentCommandEvent(aEvent->AsContentCommandEvent());
break;
case eContentCommandScroll:
DoContentCommandScrollEvent(aEvent->AsContentCommandEvent());
break;
case eCompositionStart:
if (aEvent->IsTrusted()) {
// If the event is trusted event, set the selected text to data of
// composition event.
WidgetCompositionEvent* compositionEvent = aEvent->AsCompositionEvent();
WidgetQueryContentEvent selectedText(true, eQuerySelectedText,
compositionEvent->mWidget);
HandleQueryContentEvent(&selectedText);
NS_ASSERTION(selectedText.mSucceeded, "Failed to get selected text");
compositionEvent->mData = selectedText.mReply.mString;
}
break;
default:
break;
}
return NS_OK;
}
void
EventStateManager::HandleQueryContentEvent(WidgetQueryContentEvent* aEvent)
{
switch (aEvent->mMessage) {
case eQuerySelectedText:
case eQueryTextContent:
case eQueryCaretRect:
case eQueryTextRect:
case eQueryEditorRect:
if (!IsTargetCrossProcess(aEvent)) {
break;
}
// Will not be handled locally, remote the event
GetCrossProcessTarget()->HandleQueryContentEvent(*aEvent);
return;
// Following events have not been supported in e10s mode yet.
case eQueryContentState:
case eQuerySelectionAsTransferable:
case eQueryCharacterAtPoint:
case eQueryDOMWidgetHittest:
case eQueryTextRectArray:
break;
default:
return;
}
// If there is an IMEContentObserver, we need to handle QueryContentEvent
// with it.
if (mIMEContentObserver) {
RefPtr<IMEContentObserver> contentObserver = mIMEContentObserver;
contentObserver->HandleQueryContentEvent(aEvent);
return;
}
ContentEventHandler handler(mPresContext);
handler.HandleQueryContentEvent(aEvent);
}
// static
int32_t
EventStateManager::GetAccessModifierMaskFor(nsISupports* aDocShell)
{
nsCOMPtr<nsIDocShellTreeItem> treeItem(do_QueryInterface(aDocShell));
if (!treeItem)
return -1; // invalid modifier
switch (treeItem->ItemType()) {
case nsIDocShellTreeItem::typeChrome:
return Prefs::ChromeAccessModifierMask();
case nsIDocShellTreeItem::typeContent:
return Prefs::ContentAccessModifierMask();
default:
return -1; // invalid modifier
}
}
static bool
IsAccessKeyTarget(nsIContent* aContent, nsIFrame* aFrame, nsAString& aKey)
{
// Use GetAttr because we want Unicode case=insensitive matching
// XXXbz shouldn't this be case-sensitive, per spec?
nsString contentKey;
if (!aContent->GetAttr(kNameSpaceID_None, nsGkAtoms::accesskey, contentKey) ||
!contentKey.Equals(aKey, nsCaseInsensitiveStringComparator()))
return false;
nsCOMPtr<nsIDOMXULDocument> xulDoc =
do_QueryInterface(aContent->OwnerDoc());
if (!xulDoc && !aContent->IsXULElement())
return true;
// For XUL we do visibility checks.
if (!aFrame)
return false;
if (aFrame->IsFocusable())
return true;
if (!aFrame->IsVisibleConsideringAncestors())
return false;
// XUL controls can be activated.
nsCOMPtr<nsIDOMXULControlElement> control(do_QueryInterface(aContent));
if (control)
return true;
// HTML area, label and legend elements are never focusable, so
// we need to check for them explicitly before giving up.
if (aContent->IsAnyOfHTMLElements(nsGkAtoms::area,
nsGkAtoms::label,
nsGkAtoms::legend)) {
return true;
}
// XUL label elements are never focusable, so we need to check for them
// explicitly before giving up.
if (aContent->IsXULElement(nsGkAtoms::label)) {
return true;
}
return false;
}
bool
EventStateManager::ExecuteAccessKey(nsTArray<uint32_t>& aAccessCharCodes,
bool aIsTrustedEvent)
{
int32_t count, start = -1;
nsIContent* focusedContent = GetFocusedContent();
if (focusedContent) {
start = mAccessKeys.IndexOf(focusedContent);
if (start == -1 && focusedContent->GetBindingParent())
start = mAccessKeys.IndexOf(focusedContent->GetBindingParent());
}
nsIContent *content;
nsIFrame *frame;
int32_t length = mAccessKeys.Count();
for (uint32_t i = 0; i < aAccessCharCodes.Length(); ++i) {
uint32_t ch = aAccessCharCodes[i];
nsAutoString accessKey;
AppendUCS4ToUTF16(ch, accessKey);
for (count = 1; count <= length; ++count) {
content = mAccessKeys[(start + count) % length];
frame = content->GetPrimaryFrame();
if (IsAccessKeyTarget(content, frame, accessKey)) {
bool shouldActivate = Prefs::KeyCausesActivation();
while (shouldActivate && ++count <= length) {
nsIContent *oc = mAccessKeys[(start + count) % length];