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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /dom/events/Event.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'dom/events/Event.cpp')
-rw-r--r--dom/events/Event.cpp1305
1 files changed, 1305 insertions, 0 deletions
diff --git a/dom/events/Event.cpp b/dom/events/Event.cpp
new file mode 100644
index 000000000..a85a0d66b
--- /dev/null
+++ b/dom/events/Event.cpp
@@ -0,0 +1,1305 @@
+/* -*- 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 "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());
+ RefPtr<Event> e = new Event(t, nullptr, nullptr);
+ bool trusted = e->Init(t);
+ 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 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
+{
+ 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(mozilla::dom::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();
+}