/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=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 "AccessCheck.h" #include "base/basictypes.h" #include "ipc/IPCMessageUtils.h" #include "mozilla/dom/Event.h" #include "mozilla/dom/ShadowRoot.h" #include "mozilla/ContentEvents.h" #include "mozilla/DOMEventTargetHelper.h" #include "mozilla/EventStateManager.h" #include "mozilla/InternalMutationEvent.h" #include "mozilla/dom/Performance.h" #include "mozilla/MiscEvents.h" #include "mozilla/MouseEvents.h" #include "mozilla/Preferences.h" #include "mozilla/TextEvents.h" #include "mozilla/TouchEvents.h" #include "nsContentUtils.h" #include "nsCOMPtr.h" #include "nsDeviceContext.h" #include "nsError.h" #include "nsGlobalWindow.h" #include "nsIFrame.h" #include "nsIContent.h" #include "nsIDocument.h" #include "nsIPresShell.h" #include "nsIScrollableFrame.h" #include "nsJSEnvironment.h" #include "nsLayoutUtils.h" #include "nsPIWindowRoot.h" #include "mozilla/TimerClamping.h" #include "WorkerPrivate.h" namespace mozilla { namespace dom { namespace workers { extern bool IsCurrentThreadRunningChromeWorker(); } // namespace workers static char *sPopupAllowedEvents; static bool sReturnHighResTimeStamp = false; static bool sReturnHighResTimeStampIsSet = false; Event::Event(EventTarget* aOwner, nsPresContext* aPresContext, WidgetEvent* aEvent) { ConstructorInit(aOwner, aPresContext, aEvent); } Event::Event(nsPIDOMWindowInner* aParent) { ConstructorInit(nsGlobalWindow::Cast(aParent), nullptr, nullptr); } void Event::ConstructorInit(EventTarget* aOwner, nsPresContext* aPresContext, WidgetEvent* aEvent) { SetOwner(aOwner); mIsMainThreadEvent = NS_IsMainThread(); if (mIsMainThreadEvent && !sReturnHighResTimeStampIsSet) { Preferences::AddBoolVarCache(&sReturnHighResTimeStamp, "dom.event.highrestimestamp.enabled", sReturnHighResTimeStamp); sReturnHighResTimeStampIsSet = true; } mPrivateDataDuplicated = false; mWantsPopupControlCheck = false; if (aEvent) { mEvent = aEvent; mEventIsInternal = false; } else { mEventIsInternal = true; /* A derived class might want to allocate its own type of aEvent (derived from WidgetEvent). To do this, it should take care to pass a non-nullptr aEvent to this ctor, e.g.: FooEvent::FooEvent(..., WidgetEvent* aEvent) : Event(..., aEvent ? aEvent : new WidgetEvent()) Then, to override the mEventIsInternal assignments done by the base ctor, it should do this in its own ctor: FooEvent::FooEvent(..., WidgetEvent* aEvent) ... { ... if (aEvent) { mEventIsInternal = false; } else { mEventIsInternal = true; } ... } */ mEvent = new WidgetEvent(false, eVoidEvent); mEvent->mTime = PR_Now(); } InitPresContextData(aPresContext); } void Event::InitPresContextData(nsPresContext* aPresContext) { mPresContext = aPresContext; // Get the explicit original target (if it's anonymous make it null) { nsCOMPtr<nsIContent> content = GetTargetFromFrame(); mExplicitOriginalTarget = content; if (content && content->IsInAnonymousSubtree()) { mExplicitOriginalTarget = nullptr; } } } Event::~Event() { NS_ASSERT_OWNINGTHREAD(Event); if (mEventIsInternal && mEvent) { delete mEvent; } } NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Event) NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY NS_INTERFACE_MAP_ENTRY(nsISupports) NS_INTERFACE_MAP_ENTRY(nsIDOMEvent) NS_INTERFACE_MAP_END NS_IMPL_CYCLE_COLLECTING_ADDREF(Event) NS_IMPL_CYCLE_COLLECTING_RELEASE(Event) NS_IMPL_CYCLE_COLLECTION_CLASS(Event) NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(Event) NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER NS_IMPL_CYCLE_COLLECTION_TRACE_END NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Event) if (tmp->mEventIsInternal) { tmp->mEvent->mTarget = nullptr; tmp->mEvent->mCurrentTarget = nullptr; tmp->mEvent->mOriginalTarget = nullptr; switch (tmp->mEvent->mClass) { case eMouseEventClass: case eMouseScrollEventClass: case eWheelEventClass: case eSimpleGestureEventClass: case ePointerEventClass: tmp->mEvent->AsMouseEventBase()->relatedTarget = nullptr; break; case eDragEventClass: { WidgetDragEvent* dragEvent = tmp->mEvent->AsDragEvent(); dragEvent->mDataTransfer = nullptr; dragEvent->relatedTarget = nullptr; break; } case eClipboardEventClass: tmp->mEvent->AsClipboardEvent()->mClipboardData = nullptr; break; case eMutationEventClass: tmp->mEvent->AsMutationEvent()->mRelatedNode = nullptr; break; case eFocusEventClass: tmp->mEvent->AsFocusEvent()->mRelatedTarget = nullptr; break; default: break; } } NS_IMPL_CYCLE_COLLECTION_UNLINK(mPresContext); NS_IMPL_CYCLE_COLLECTION_UNLINK(mExplicitOriginalTarget); NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner); NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER NS_IMPL_CYCLE_COLLECTION_UNLINK_END NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(Event) if (tmp->mEventIsInternal) { NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEvent->mTarget) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEvent->mCurrentTarget) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mEvent->mOriginalTarget) switch (tmp->mEvent->mClass) { case eMouseEventClass: case eMouseScrollEventClass: case eWheelEventClass: case eSimpleGestureEventClass: case ePointerEventClass: NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->relatedTarget"); cb.NoteXPCOMChild(tmp->mEvent->AsMouseEventBase()->relatedTarget); break; case eDragEventClass: { WidgetDragEvent* dragEvent = tmp->mEvent->AsDragEvent(); NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->mDataTransfer"); cb.NoteXPCOMChild(dragEvent->mDataTransfer); NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->relatedTarget"); cb.NoteXPCOMChild(dragEvent->relatedTarget); break; } case eClipboardEventClass: NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->mClipboardData"); cb.NoteXPCOMChild(tmp->mEvent->AsClipboardEvent()->mClipboardData); break; case eMutationEventClass: NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->mRelatedNode"); cb.NoteXPCOMChild(tmp->mEvent->AsMutationEvent()->mRelatedNode); break; case eFocusEventClass: NS_CYCLE_COLLECTION_NOTE_EDGE_NAME(cb, "mEvent->mRelatedTarget"); cb.NoteXPCOMChild(tmp->mEvent->AsFocusEvent()->mRelatedTarget); break; default: break; } } NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPresContext) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mExplicitOriginalTarget) NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwner) NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END JSObject* Event::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) { return WrapObjectInternal(aCx, aGivenProto); } JSObject* Event::WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) { return EventBinding::Wrap(aCx, this, aGivenProto); } bool Event::IsChrome(JSContext* aCx) const { return mIsMainThreadEvent ? xpc::AccessCheck::isChrome(js::GetContextCompartment(aCx)) : mozilla::dom::workers::IsCurrentThreadRunningChromeWorker(); } // nsIDOMEventInterface NS_IMETHODIMP Event::GetType(nsAString& aType) { if (!mIsMainThreadEvent || !mEvent->mSpecifiedEventTypeString.IsEmpty()) { aType = mEvent->mSpecifiedEventTypeString; return NS_OK; } const char* name = GetEventName(mEvent->mMessage); if (name) { CopyASCIItoUTF16(name, aType); return NS_OK; } else if (mEvent->mMessage == eUnidentifiedEvent && mEvent->mSpecifiedEventType) { // Remove "on" aType = Substring(nsDependentAtomString(mEvent->mSpecifiedEventType), 2); mEvent->mSpecifiedEventTypeString = aType; return NS_OK; } aType.Truncate(); return NS_OK; } static EventTarget* GetDOMEventTarget(nsIDOMEventTarget* aTarget) { return aTarget ? aTarget->GetTargetForDOMEvent() : nullptr; } EventTarget* Event::GetTarget() const { return GetDOMEventTarget(mEvent->mTarget); } NS_IMETHODIMP Event::GetTarget(nsIDOMEventTarget** aTarget) { NS_IF_ADDREF(*aTarget = GetTarget()); return NS_OK; } EventTarget* Event::GetCurrentTarget() const { return GetDOMEventTarget(mEvent->mCurrentTarget); } NS_IMETHODIMP Event::GetCurrentTarget(nsIDOMEventTarget** aCurrentTarget) { NS_IF_ADDREF(*aCurrentTarget = GetCurrentTarget()); return NS_OK; } // // Get the actual event target node (may have been retargeted for mouse events) // already_AddRefed<nsIContent> Event::GetTargetFromFrame() { if (!mPresContext) { return nullptr; } // Get the mTarget frame (have to get the ESM first) nsIFrame* targetFrame = mPresContext->EventStateManager()->GetEventTarget(); if (!targetFrame) { return nullptr; } // get the real content nsCOMPtr<nsIContent> realEventContent; targetFrame->GetContentForEvent(mEvent, getter_AddRefs(realEventContent)); return realEventContent.forget(); } EventTarget* Event::GetExplicitOriginalTarget() const { if (mExplicitOriginalTarget) { return mExplicitOriginalTarget; } return GetTarget(); } NS_IMETHODIMP Event::GetExplicitOriginalTarget(nsIDOMEventTarget** aRealEventTarget) { NS_IF_ADDREF(*aRealEventTarget = GetExplicitOriginalTarget()); return NS_OK; } EventTarget* Event::GetOriginalTarget() const { if (mEvent->mOriginalTarget) { return GetDOMEventTarget(mEvent->mOriginalTarget); } return GetTarget(); } NS_IMETHODIMP Event::GetOriginalTarget(nsIDOMEventTarget** aOriginalTarget) { NS_IF_ADDREF(*aOriginalTarget = GetOriginalTarget()); return NS_OK; } EventTarget* Event::GetComposedTarget() const { EventTarget* et = GetOriginalTarget(); nsCOMPtr<nsIContent> content = do_QueryInterface(et); if (!content) { return et; } nsIContent* nonChrome = content->FindFirstNonChromeOnlyAccessContent(); return nonChrome ? static_cast<EventTarget*>(nonChrome) : static_cast<EventTarget*>(content->GetComposedDoc()); } NS_IMETHODIMP_(void) Event::SetTrusted(bool aTrusted) { mEvent->mFlags.mIsTrusted = aTrusted; } bool Event::Init(mozilla::dom::EventTarget* aGlobal) { if (!mIsMainThreadEvent) { return nsContentUtils::ThreadsafeIsCallerChrome(); } bool trusted = false; nsCOMPtr<nsPIDOMWindowInner> w = do_QueryInterface(aGlobal); if (w) { nsCOMPtr<nsIDocument> d = w->GetExtantDoc(); if (d) { trusted = nsContentUtils::IsChromeDoc(d); nsIPresShell* s = d->GetShell(); if (s) { InitPresContextData(s->GetPresContext()); } } } return trusted; } // static already_AddRefed<Event> Event::Constructor(const GlobalObject& aGlobal, const nsAString& aType, const EventInit& aParam, ErrorResult& aRv) { nsCOMPtr<mozilla::dom::EventTarget> t = do_QueryInterface(aGlobal.GetAsSupports()); return Constructor(t, aType, aParam); } // static already_AddRefed<Event> Event::Constructor(EventTarget* aEventTarget, const nsAString& aType, const EventInit& aParam) { RefPtr<Event> e = new Event(aEventTarget, nullptr, nullptr); bool trusted = e->Init(aEventTarget); e->InitEvent(aType, aParam.mBubbles, aParam.mCancelable); e->SetTrusted(trusted); e->SetComposed(aParam.mComposed); return e.forget(); } uint16_t Event::EventPhase() const { // Note, remember to check that this works also // if or when Bug 235441 is fixed. if ((mEvent->mCurrentTarget && mEvent->mCurrentTarget == mEvent->mTarget) || mEvent->mFlags.InTargetPhase()) { return nsIDOMEvent::AT_TARGET; } if (mEvent->mFlags.mInCapturePhase) { return nsIDOMEvent::CAPTURING_PHASE; } if (mEvent->mFlags.mInBubblingPhase) { return nsIDOMEvent::BUBBLING_PHASE; } return nsIDOMEvent::NONE; } NS_IMETHODIMP Event::GetEventPhase(uint16_t* aEventPhase) { *aEventPhase = EventPhase(); return NS_OK; } NS_IMETHODIMP Event::GetBubbles(bool* aBubbles) { *aBubbles = Bubbles(); return NS_OK; } NS_IMETHODIMP Event::GetCancelable(bool* aCancelable) { *aCancelable = Cancelable(); return NS_OK; } NS_IMETHODIMP Event::GetTimeStamp(uint64_t* aTimeStamp) { *aTimeStamp = mEvent->mTime; return NS_OK; } NS_IMETHODIMP Event::StopPropagation() { mEvent->StopPropagation(); return NS_OK; } NS_IMETHODIMP Event::StopImmediatePropagation() { mEvent->StopImmediatePropagation(); return NS_OK; } NS_IMETHODIMP Event::StopCrossProcessForwarding() { mEvent->StopCrossProcessForwarding(); return NS_OK; } NS_IMETHODIMP Event::GetIsTrusted(bool* aIsTrusted) { *aIsTrusted = IsTrusted(); return NS_OK; } NS_IMETHODIMP Event::PreventDefault() { // This method is called only from C++ code which must handle default action // of this event. So, pass true always. PreventDefaultInternal(true); return NS_OK; } void Event::PreventDefault(JSContext* aCx) { MOZ_ASSERT(aCx, "JS context must be specified"); // Note that at handling default action, another event may be dispatched. // Then, JS in content mey be call preventDefault() // even in the event is in system event group. Therefore, don't refer // mInSystemGroup here. PreventDefaultInternal(IsChrome(aCx)); } void Event::PreventDefaultInternal(bool aCalledByDefaultHandler) { if (!mEvent->mFlags.mCancelable) { return; } if (mEvent->mFlags.mInPassiveListener) { nsCOMPtr<nsPIDOMWindowInner> win(do_QueryInterface(mOwner)); if (win) { if (nsIDocument* doc = win->GetExtantDoc()) { nsString type; GetType(type); const char16_t* params[] = { type.get() }; doc->WarnOnceAbout(nsIDocument::ePreventDefaultFromPassiveListener, false, params, ArrayLength(params)); } } return; } mEvent->PreventDefault(aCalledByDefaultHandler); if (!IsTrusted()) { return; } WidgetDragEvent* dragEvent = mEvent->AsDragEvent(); if (!dragEvent) { return; } nsCOMPtr<nsINode> node = do_QueryInterface(mEvent->mCurrentTarget); if (!node) { nsCOMPtr<nsPIDOMWindowOuter> win = do_QueryInterface(mEvent->mCurrentTarget); if (!win) { return; } node = win->GetExtantDoc(); } if (!nsContentUtils::IsChromeDoc(node->OwnerDoc())) { dragEvent->mDefaultPreventedOnContent = true; } } void Event::SetEventType(const nsAString& aEventTypeArg) { if (mIsMainThreadEvent) { mEvent->mSpecifiedEventTypeString.Truncate(); mEvent->mSpecifiedEventType = nsContentUtils::GetEventMessageAndAtom(aEventTypeArg, mEvent->mClass, &(mEvent->mMessage)); mEvent->SetDefaultComposed(); } else { mEvent->mSpecifiedEventType = nullptr; mEvent->mMessage = eUnidentifiedEvent; mEvent->mSpecifiedEventTypeString = aEventTypeArg; mEvent->SetComposed(aEventTypeArg); } mEvent->SetDefaultComposedInNativeAnonymousContent(); } void Event::InitEvent(const nsAString& aEventTypeArg, bool aCanBubbleArg, bool aCancelableArg) { // Make sure this event isn't already being dispatched. NS_ENSURE_TRUE_VOID(!mEvent->mFlags.mIsBeingDispatched); if (IsTrusted()) { // Ensure the caller is permitted to dispatch trusted DOM events. if (!nsContentUtils::ThreadsafeIsCallerChrome()) { SetTrusted(false); } } SetEventType(aEventTypeArg); mEvent->mFlags.mBubbles = aCanBubbleArg; mEvent->mFlags.mCancelable = aCancelableArg; mEvent->mFlags.mDefaultPrevented = false; mEvent->mFlags.mDefaultPreventedByContent = false; mEvent->mFlags.mDefaultPreventedByChrome = false; mEvent->mFlags.mPropagationStopped = false; mEvent->mFlags.mImmediatePropagationStopped = false; // Clearing the old targets, so that the event is targeted correctly when // re-dispatching it. mEvent->mTarget = nullptr; mEvent->mOriginalTarget = nullptr; } NS_IMETHODIMP Event::DuplicatePrivateData() { NS_ASSERTION(mEvent, "No WidgetEvent for Event duplication!"); if (mEventIsInternal) { return NS_OK; } mEvent = mEvent->Duplicate(); mPresContext = nullptr; mEventIsInternal = true; mPrivateDataDuplicated = true; return NS_OK; } NS_IMETHODIMP Event::SetTarget(nsIDOMEventTarget* aTarget) { mEvent->mTarget = do_QueryInterface(aTarget); return NS_OK; } NS_IMETHODIMP_(bool) Event::IsDispatchStopped() { return mEvent->PropagationStopped(); } NS_IMETHODIMP_(WidgetEvent*) Event::WidgetEventPtr() { return mEvent; } NS_IMETHODIMP_(Event*) Event::InternalDOMEvent() { return this; } // return true if eventName is contained within events, delimited by // spaces static bool PopupAllowedForEvent(const char *eventName) { if (!sPopupAllowedEvents) { Event::PopupAllowedEventsChanged(); if (!sPopupAllowedEvents) { return false; } } nsDependentCString events(sPopupAllowedEvents); nsAFlatCString::const_iterator start, end; nsAFlatCString::const_iterator startiter(events.BeginReading(start)); events.EndReading(end); while (startiter != end) { nsAFlatCString::const_iterator enditer(end); if (!FindInReadable(nsDependentCString(eventName), startiter, enditer)) return false; // the match is surrounded by spaces, or at a string boundary if ((startiter == start || *--startiter == ' ') && (enditer == end || *enditer == ' ')) { return true; } // Move on and see if there are other matches. (The delimitation // requirement makes it pointless to begin the next search before // the end of the invalid match just found.) startiter = enditer; } return false; } // static PopupControlState Event::GetEventPopupControlState(WidgetEvent* aEvent, nsIDOMEvent* aDOMEvent) { // generally if an event handler is running, new windows are disallowed. // check for exceptions: PopupControlState abuse = openAbused; if (aDOMEvent && aDOMEvent->InternalDOMEvent()->GetWantsPopupControlCheck()) { nsAutoString type; aDOMEvent->GetType(type); if (PopupAllowedForEvent(NS_ConvertUTF16toUTF8(type).get())) { return openAllowed; } } switch(aEvent->mClass) { case eBasicEventClass: // For these following events only allow popups if they're // triggered while handling user input. See // nsPresShell::HandleEventInternal() for details. if (EventStateManager::IsHandlingUserInput()) { switch(aEvent->mMessage) { case eFormSelect: if (PopupAllowedForEvent("select")) { abuse = openControlled; } break; case eFormChange: if (PopupAllowedForEvent("change")) { abuse = openControlled; } break; default: break; } } break; case eEditorInputEventClass: // For this following event only allow popups if it's triggered // while handling user input. See // nsPresShell::HandleEventInternal() for details. if (EventStateManager::IsHandlingUserInput()) { switch(aEvent->mMessage) { case eEditorInput: if (PopupAllowedForEvent("input")) { abuse = openControlled; } break; default: break; } } break; case eInputEventClass: // For this following event only allow popups if it's triggered // while handling user input. See // nsPresShell::HandleEventInternal() for details. if (EventStateManager::IsHandlingUserInput()) { switch(aEvent->mMessage) { case eFormChange: if (PopupAllowedForEvent("change")) { abuse = openControlled; } break; case eXULCommand: abuse = openControlled; break; default: break; } } break; case eKeyboardEventClass: if (aEvent->IsTrusted()) { uint32_t key = aEvent->AsKeyboardEvent()->mKeyCode; switch(aEvent->mMessage) { case eKeyPress: // return key on focused button. see note at eMouseClick. if (key == NS_VK_RETURN) { abuse = openAllowed; } else if (PopupAllowedForEvent("keypress")) { abuse = openControlled; } break; case eKeyUp: // space key on focused button. see note at eMouseClick. if (key == NS_VK_SPACE) { abuse = openAllowed; } else if (PopupAllowedForEvent("keyup")) { abuse = openControlled; } break; case eKeyDown: if (PopupAllowedForEvent("keydown")) { abuse = openControlled; } break; default: break; } } break; case eTouchEventClass: if (aEvent->IsTrusted()) { switch (aEvent->mMessage) { case eTouchStart: if (PopupAllowedForEvent("touchstart")) { abuse = openControlled; } break; case eTouchEnd: if (PopupAllowedForEvent("touchend")) { abuse = openControlled; } break; default: break; } } break; case eMouseEventClass: if (aEvent->IsTrusted() && aEvent->AsMouseEvent()->button == WidgetMouseEvent::eLeftButton) { switch(aEvent->mMessage) { case eMouseUp: if (PopupAllowedForEvent("mouseup")) { abuse = openControlled; } break; case eMouseDown: if (PopupAllowedForEvent("mousedown")) { abuse = openControlled; } break; case eMouseClick: /* Click events get special treatment because of their historical status as a more legitimate event handler. If click popups are enabled in the prefs, clear the popup status completely. */ if (PopupAllowedForEvent("click")) { abuse = openAllowed; } break; case eMouseDoubleClick: if (PopupAllowedForEvent("dblclick")) { abuse = openControlled; } break; default: break; } } break; case ePointerEventClass: if (aEvent->IsTrusted() && aEvent->AsPointerEvent()->button == WidgetMouseEvent::eLeftButton) { switch(aEvent->mMessage) { case ePointerUp: if (PopupAllowedForEvent("pointerup")) { abuse = openControlled; } break; case ePointerDown: if (PopupAllowedForEvent("pointerdown")) { abuse = openControlled; } break; default: break; } } break; case eFormEventClass: // For these following events only allow popups if they're // triggered while handling user input. See // nsPresShell::HandleEventInternal() for details. if (EventStateManager::IsHandlingUserInput()) { switch(aEvent->mMessage) { case eFormSubmit: if (PopupAllowedForEvent("submit")) { abuse = openControlled; } break; case eFormReset: if (PopupAllowedForEvent("reset")) { abuse = openControlled; } break; default: break; } } break; default: break; } return abuse; } // static void Event::PopupAllowedEventsChanged() { if (sPopupAllowedEvents) { free(sPopupAllowedEvents); } nsAdoptingCString str = Preferences::GetCString("dom.popup_allowed_events"); // We'll want to do this even if str is empty to avoid looking up // this pref all the time if it's not set. sPopupAllowedEvents = ToNewCString(str); } // static void Event::Shutdown() { if (sPopupAllowedEvents) { free(sPopupAllowedEvents); } } // static CSSIntPoint Event::GetScreenCoords(nsPresContext* aPresContext, WidgetEvent* aEvent, LayoutDeviceIntPoint aPoint) { if (!nsContentUtils::LegacyIsCallerChromeOrNativeCode() && nsContentUtils::ResistFingerprinting()) { // When resisting fingerprinting, return client coordinates instead. return GetClientCoords(aPresContext, aEvent, aPoint, CSSIntPoint(0, 0)); } if (EventStateManager::sIsPointerLocked) { return EventStateManager::sLastScreenPoint; } if (!aEvent || (aEvent->mClass != eMouseEventClass && aEvent->mClass != eMouseScrollEventClass && aEvent->mClass != eWheelEventClass && aEvent->mClass != ePointerEventClass && aEvent->mClass != eTouchEventClass && aEvent->mClass != eDragEventClass && aEvent->mClass != eSimpleGestureEventClass)) { return CSSIntPoint(0, 0); } // Doing a straight conversion from LayoutDeviceIntPoint to CSSIntPoint // seem incorrect, but it is needed to maintain legacy functionality. WidgetGUIEvent* guiEvent = aEvent->AsGUIEvent(); if (!aPresContext || !(guiEvent && guiEvent->mWidget)) { return CSSIntPoint(aPoint.x, aPoint.y); } nsPoint pt = LayoutDevicePixel::ToAppUnits(aPoint, aPresContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom()); if (nsIPresShell* ps = aPresContext->GetPresShell()) { pt = pt.RemoveResolution(nsLayoutUtils::GetCurrentAPZResolutionScale(ps)); } pt += LayoutDevicePixel::ToAppUnits(guiEvent->mWidget->WidgetToScreenOffset(), aPresContext->DeviceContext()->AppUnitsPerDevPixelAtUnitFullZoom()); return CSSPixel::FromAppUnitsRounded(pt); } // static CSSIntPoint Event::GetPageCoords(nsPresContext* aPresContext, WidgetEvent* aEvent, LayoutDeviceIntPoint aPoint, CSSIntPoint aDefaultPoint) { CSSIntPoint pagePoint = Event::GetClientCoords(aPresContext, aEvent, aPoint, aDefaultPoint); // If there is some scrolling, add scroll info to client point. if (aPresContext && aPresContext->GetPresShell()) { nsIPresShell* shell = aPresContext->GetPresShell(); nsIScrollableFrame* scrollframe = shell->GetRootScrollFrameAsScrollable(); if (scrollframe) { pagePoint += CSSIntPoint::FromAppUnitsRounded(scrollframe->GetScrollPosition()); } } return pagePoint; } // static CSSIntPoint Event::GetClientCoords(nsPresContext* aPresContext, WidgetEvent* aEvent, LayoutDeviceIntPoint aPoint, CSSIntPoint aDefaultPoint) { if (EventStateManager::sIsPointerLocked) { return EventStateManager::sLastClientPoint; } if (!aEvent || (aEvent->mClass != eMouseEventClass && aEvent->mClass != eMouseScrollEventClass && aEvent->mClass != eWheelEventClass && aEvent->mClass != eTouchEventClass && aEvent->mClass != eDragEventClass && aEvent->mClass != ePointerEventClass && aEvent->mClass != eSimpleGestureEventClass) || !aPresContext || !aEvent->AsGUIEvent()->mWidget) { return aDefaultPoint; } nsIPresShell* shell = aPresContext->GetPresShell(); if (!shell) { return CSSIntPoint(0, 0); } nsIFrame* rootFrame = shell->GetRootFrame(); if (!rootFrame) { return CSSIntPoint(0, 0); } nsPoint pt = nsLayoutUtils::GetEventCoordinatesRelativeTo(aEvent, aPoint, rootFrame); return CSSIntPoint::FromAppUnitsRounded(pt); } // static CSSIntPoint Event::GetOffsetCoords(nsPresContext* aPresContext, WidgetEvent* aEvent, LayoutDeviceIntPoint aPoint, CSSIntPoint aDefaultPoint) { if (!aEvent->mTarget) { return GetPageCoords(aPresContext, aEvent, aPoint, aDefaultPoint); } nsCOMPtr<nsIContent> content = do_QueryInterface(aEvent->mTarget); if (!content || !aPresContext) { return CSSIntPoint(0, 0); } nsCOMPtr<nsIPresShell> shell = aPresContext->GetPresShell(); if (!shell) { return CSSIntPoint(0, 0); } shell->FlushPendingNotifications(Flush_Layout); nsIFrame* frame = content->GetPrimaryFrame(); if (!frame) { return CSSIntPoint(0, 0); } nsIFrame* rootFrame = shell->GetRootFrame(); if (!rootFrame) { return CSSIntPoint(0, 0); } CSSIntPoint clientCoords = GetClientCoords(aPresContext, aEvent, aPoint, aDefaultPoint); nsPoint pt = CSSPixel::ToAppUnits(clientCoords); if (nsLayoutUtils::TransformPoint(rootFrame, frame, pt) == nsLayoutUtils::TRANSFORM_SUCCEEDED) { pt -= frame->GetPaddingRectRelativeToSelf().TopLeft(); return CSSPixel::FromAppUnitsRounded(pt); } return CSSIntPoint(0, 0); } // To be called ONLY by Event::GetType (which has the additional // logic for handling user-defined events). // static const char* Event::GetEventName(EventMessage aEventType) { switch(aEventType) { #define MESSAGE_TO_EVENT(name_, _message, _type, _struct) \ case _message: return #name_; #include "mozilla/EventNameList.h" #undef MESSAGE_TO_EVENT default: break; } // XXXldb We can hit this case for WidgetEvent objects that we didn't // create and that are not user defined events since this function and // SetEventType are incomplete. (But fixing that requires fixing the // arrays in nsEventListenerManager too, since the events for which // this is a problem generally *are* created by Event.) return nullptr; } bool Event::DefaultPrevented(JSContext* aCx) const { MOZ_ASSERT(aCx, "JS context must be specified"); NS_ENSURE_TRUE(mEvent, false); // If preventDefault() has never been called, just return false. if (!mEvent->DefaultPrevented()) { return false; } // If preventDefault() has been called by content, return true. Otherwise, // i.e., preventDefault() has been called by chrome, return true only when // this is called by chrome. return mEvent->DefaultPreventedByContent() || IsChrome(aCx); } double Event::TimeStamp() const { return TimerClamping::ReduceMsTimeValue(TimeStampImpl()); } double Event::TimeStampImpl() const { if (!sReturnHighResTimeStamp) { return static_cast<double>(mEvent->mTime); } if (mEvent->mTimeStamp.IsNull()) { return 0.0; } if (mIsMainThreadEvent) { if (NS_WARN_IF(!mOwner)) { return 0.0; } nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(mOwner); if (NS_WARN_IF(!win)) { return 0.0; } Performance* perf = win->GetPerformance(); if (NS_WARN_IF(!perf)) { return 0.0; } return perf->GetDOMTiming()->TimeStampToDOMHighRes(mEvent->mTimeStamp); } // For dedicated workers, we should make times relative to the navigation // start of the document that created the worker, which is the same as the // timebase for performance.now(). workers::WorkerPrivate* workerPrivate = workers::GetCurrentThreadWorkerPrivate(); MOZ_ASSERT(workerPrivate); TimeDuration duration = mEvent->mTimeStamp - workerPrivate->NowBaseTimeStamp(); return duration.ToMilliseconds(); } bool Event::GetPreventDefault() const { nsCOMPtr<nsPIDOMWindowInner> win(do_QueryInterface(mOwner)); if (win) { if (nsIDocument* doc = win->GetExtantDoc()) { doc->WarnOnceAbout(nsIDocument::eGetPreventDefault); } } // GetPreventDefault() is legacy and Gecko specific method. Although, // the result should be same as defaultPrevented, we don't need to break // backward compatibility of legacy method. Let's behave traditionally. return DefaultPrevented(); } NS_IMETHODIMP Event::GetPreventDefault(bool* aReturn) { NS_ENSURE_ARG_POINTER(aReturn); *aReturn = GetPreventDefault(); return NS_OK; } NS_IMETHODIMP Event::GetDefaultPrevented(bool* aReturn) { NS_ENSURE_ARG_POINTER(aReturn); // This method must be called by only event handlers implemented by C++. // Then, the handlers must handle default action. So, this method don't need // to check if preventDefault() has been called by content or chrome. *aReturn = DefaultPrevented(); return NS_OK; } NS_IMETHODIMP_(void) Event::Serialize(IPC::Message* aMsg, bool aSerializeInterfaceType) { if (aSerializeInterfaceType) { IPC::WriteParam(aMsg, NS_LITERAL_STRING("event")); } nsString type; GetType(type); IPC::WriteParam(aMsg, type); IPC::WriteParam(aMsg, Bubbles()); IPC::WriteParam(aMsg, Cancelable()); IPC::WriteParam(aMsg, IsTrusted()); IPC::WriteParam(aMsg, Composed()); // No timestamp serialization for now! } NS_IMETHODIMP_(bool) Event::Deserialize(const IPC::Message* aMsg, PickleIterator* aIter) { nsString type; NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &type), false); bool bubbles = false; NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &bubbles), false); bool cancelable = false; NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &cancelable), false); bool trusted = false; NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &trusted), false); bool composed = false; NS_ENSURE_TRUE(IPC::ReadParam(aMsg, aIter, &composed), false); InitEvent(type, bubbles, cancelable); SetTrusted(trusted); SetComposed(composed); return true; } NS_IMETHODIMP_(void) Event::SetOwner(EventTarget* aOwner) { mOwner = nullptr; if (!aOwner) { return; } nsCOMPtr<nsINode> n = do_QueryInterface(aOwner); if (n) { mOwner = n->OwnerDoc()->GetScopeObject(); return; } nsCOMPtr<nsPIDOMWindowInner> w = do_QueryInterface(aOwner); if (w) { mOwner = do_QueryInterface(w); return; } nsCOMPtr<DOMEventTargetHelper> eth = do_QueryInterface(aOwner); if (eth) { mOwner = eth->GetParentObject(); return; } #ifdef DEBUG nsCOMPtr<nsPIWindowRoot> root = do_QueryInterface(aOwner); MOZ_ASSERT(root, "Unexpected EventTarget!"); #endif } // static nsIContent* Event::GetShadowRelatedTarget(nsIContent* aCurrentTarget, nsIContent* aRelatedTarget) { if (!aCurrentTarget || !aRelatedTarget) { return nullptr; } // Walk up the ancestor node trees of the related target until // we encounter the node tree of the current target in order // to find the adjusted related target. Walking up the tree may // not find a common ancestor node tree if the related target is in // an ancestor tree, but in that case it does not need to be adjusted. ShadowRoot* currentTargetShadow = aCurrentTarget->GetContainingShadow(); if (!currentTargetShadow) { return nullptr; } nsIContent* relatedTarget = aCurrentTarget; while (relatedTarget) { ShadowRoot* ancestorShadow = relatedTarget->GetContainingShadow(); if (currentTargetShadow == ancestorShadow) { return relatedTarget; } // Didn't find the ancestor tree, thus related target does not have to // adjusted. if (!ancestorShadow) { return nullptr; } relatedTarget = ancestorShadow->GetHost(); } return nullptr; } NS_IMETHODIMP Event::GetCancelBubble(bool* aCancelBubble) { NS_ENSURE_ARG_POINTER(aCancelBubble); *aCancelBubble = CancelBubble(); return NS_OK; } NS_IMETHODIMP Event::SetCancelBubble(bool aCancelBubble) { if (aCancelBubble) { mEvent->StopPropagation(); } return NS_OK; } } // namespace dom } // namespace mozilla using namespace mozilla; using namespace mozilla::dom; already_AddRefed<Event> NS_NewDOMEvent(EventTarget* aOwner, nsPresContext* aPresContext, WidgetEvent* aEvent) { RefPtr<Event> it = new Event(aOwner, aPresContext, aEvent); return it.forget(); }