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EventListenerManager.cpp
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/* -*- 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/. */
// Microsoft's API Name hackery sucks
#undef CreateEvent
#include "js/loader/LoadedScript.h"
#include "mozilla/BasicEvents.h"
#include "mozilla/CycleCollectedJSRuntime.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/EventDispatcher.h"
#include "mozilla/EventListenerManager.h"
#include "mozilla/HalSensor.h"
#include "mozilla/InternalMutationEvent.h"
#include "mozilla/JSEventHandler.h"
#include "mozilla/Maybe.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/Preferences.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/AbortSignal.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/EventCallbackDebuggerNotification.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Event.h"
#include "mozilla/dom/EventTargetBinding.h"
#include "mozilla/dom/PopupBlocker.h"
#include "mozilla/dom/ScriptLoader.h"
#include "mozilla/dom/ScriptSettings.h"
#include "mozilla/dom/TouchEvent.h"
#include "mozilla/dom/UserActivation.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/StaticPrefs_dom.h"
#include "mozilla/TimeStamp.h"
#include "mozilla/dom/ChromeUtils.h"
#include "EventListenerService.h"
#include "nsCOMPtr.h"
#include "nsContentUtils.h"
#include "nsDOMCID.h"
#include "nsError.h"
#include "nsGenericHTMLElement.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsIContentSecurityPolicy.h"
#include "mozilla/dom/Document.h"
#include "nsIScriptGlobalObject.h"
#include "nsISupports.h"
#include "nsJSUtils.h"
#include "nsNameSpaceManager.h"
#include "nsPIDOMWindow.h"
#include "nsPrintfCString.h"
#include "nsSandboxFlags.h"
#include "xpcpublic.h"
#include "nsIFrame.h"
#include "nsDisplayList.h"
namespace mozilla {
using namespace dom;
using namespace hal;
#define EVENT_TYPE_EQUALS(ls, message, userType, allEvents) \
((ls->mEventMessage == message && \
(ls->mEventMessage != eUnidentifiedEvent || ls->mTypeAtom == userType)) || \
(allEvents && ls->mAllEvents))
static const uint32_t kAllMutationBits =
NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED |
NS_EVENT_BITS_MUTATION_NODEINSERTED | NS_EVENT_BITS_MUTATION_NODEREMOVED |
NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |
NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT |
NS_EVENT_BITS_MUTATION_ATTRMODIFIED |
NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED;
static uint32_t MutationBitForEventType(EventMessage aEventType) {
switch (aEventType) {
case eLegacySubtreeModified:
return NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED;
case eLegacyNodeInserted:
return NS_EVENT_BITS_MUTATION_NODEINSERTED;
case eLegacyNodeRemoved:
return NS_EVENT_BITS_MUTATION_NODEREMOVED;
case eLegacyNodeRemovedFromDocument:
return NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT;
case eLegacyNodeInsertedIntoDocument:
return NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT;
case eLegacyAttrModified:
return NS_EVENT_BITS_MUTATION_ATTRMODIFIED;
case eLegacyCharacterDataModified:
return NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED;
default:
break;
}
return 0;
}
uint32_t EventListenerManager::sMainThreadCreatedCount = 0;
EventListenerManagerBase::EventListenerManagerBase()
: mMayHavePaintEventListener(false),
mMayHaveMutationListeners(false),
mMayHaveCapturingListeners(false),
mMayHaveSystemGroupListeners(false),
mMayHaveTouchEventListener(false),
mMayHaveMouseEnterLeaveEventListener(false),
mMayHavePointerEnterLeaveEventListener(false),
mMayHaveKeyEventListener(false),
mMayHaveInputOrCompositionEventListener(false),
mMayHaveSelectionChangeEventListener(false),
mMayHaveFormSelectEventListener(false),
mMayHaveTransitionEventListener(false),
mClearingListeners(false),
mIsMainThreadELM(NS_IsMainThread()),
mHasNonPrivilegedClickListeners(false),
mUnknownNonPrivilegedClickListeners(false) {
ClearNoListenersForEvents();
static_assert(sizeof(EventListenerManagerBase) == sizeof(uint64_t),
"Keep the size of EventListenerManagerBase size compact!");
}
EventListenerManager::EventListenerManager(EventTarget* aTarget)
: EventListenerManagerBase(), mTarget(aTarget) {
NS_ASSERTION(aTarget, "unexpected null pointer");
if (mIsMainThreadELM) {
++sMainThreadCreatedCount;
}
}
EventListenerManager::~EventListenerManager() {
// If your code fails this assertion, a possible reason is that
// a class did not call our Disconnect() manually. Note that
// this class can have Disconnect called in one of two ways:
// if it is part of a cycle, then in Unlink() (such a cycle
// would be with one of the listeners, not mTarget which is weak).
// If not part of a cycle, then Disconnect must be called manually,
// typically from the destructor of the owner class (mTarget).
// XXX azakai: Is there any reason to not just call Disconnect
// from right here, if not previously called?
NS_ASSERTION(!mTarget, "didn't call Disconnect");
RemoveAllListenersSilently();
}
void EventListenerManager::RemoveAllListenersSilently() {
if (mClearingListeners) {
return;
}
mClearingListeners = true;
mListeners.Clear();
mClearingListeners = false;
}
inline void ImplCycleCollectionTraverse(
nsCycleCollectionTraversalCallback& aCallback,
EventListenerManager::Listener& aField, const char* aName,
unsigned aFlags) {
if (MOZ_UNLIKELY(aCallback.WantDebugInfo())) {
nsAutoCString name;
name.AppendASCII(aName);
if (aField.mTypeAtom) {
name.AppendLiteral(" event=");
name.Append(nsAtomCString(aField.mTypeAtom));
name.AppendLiteral(" listenerType=");
name.AppendInt(aField.mListenerType);
name.AppendLiteral(" ");
}
CycleCollectionNoteChild(aCallback, aField.mListener.GetISupports(),
name.get(), aFlags);
} else {
CycleCollectionNoteChild(aCallback, aField.mListener.GetISupports(), aName,
aFlags);
}
CycleCollectionNoteChild(aCallback, aField.mSignalFollower.get(),
"mSignalFollower", aFlags);
}
NS_IMPL_CYCLE_COLLECTION_CLASS(EventListenerManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(EventListenerManager)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mListeners)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(EventListenerManager)
tmp->Disconnect();
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
nsPIDOMWindowInner* EventListenerManager::GetInnerWindowForTarget() {
if (nsINode* node = nsINode::FromEventTargetOrNull(mTarget)) {
// XXX sXBL/XBL2 issue -- do we really want the owner here? What
// if that's the XBL document?
return node->OwnerDoc()->GetInnerWindow();
}
nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow();
return window;
}
already_AddRefed<nsPIDOMWindowInner>
EventListenerManager::GetTargetAsInnerWindow() const {
nsCOMPtr<nsPIDOMWindowInner> window =
nsPIDOMWindowInner::FromEventTargetOrNull(mTarget);
return window.forget();
}
void EventListenerManager::AddEventListenerInternal(
EventListenerHolder aListenerHolder, EventMessage aEventMessage,
nsAtom* aTypeAtom, const EventListenerFlags& aFlags, bool aHandler,
bool aAllEvents, AbortSignal* aSignal) {
MOZ_ASSERT((aEventMessage && aTypeAtom) || aAllEvents, // all-events listener
"Missing type");
if (!aListenerHolder || mClearingListeners) {
return;
}
if (aSignal && aSignal->Aborted()) {
return;
}
// Since there is no public API to call us with an EventListenerHolder, we
// know that there's an EventListenerHolder on the stack holding a strong ref
// to the listener.
Listener* listener;
uint32_t count = mListeners.Length();
for (uint32_t i = 0; i < count; i++) {
listener = &mListeners.ElementAt(i);
// mListener == aListenerHolder is the last one, since it can be a bit slow.
if (listener->mListenerIsHandler == aHandler &&
listener->mFlags.EqualsForAddition(aFlags) &&
EVENT_TYPE_EQUALS(listener, aEventMessage, aTypeAtom, aAllEvents) &&
listener->mListener == aListenerHolder) {
return;
}
}
ClearNoListenersForEvents();
mNoListenerForEventAtom = nullptr;
listener =
aAllEvents ? mListeners.InsertElementAt(0) : mListeners.AppendElement();
listener->mEventMessage = aEventMessage;
listener->mTypeAtom = aTypeAtom;
listener->mFlags = aFlags;
listener->mListenerIsHandler = aHandler;
listener->mHandlerIsString = false;
listener->mAllEvents = aAllEvents;
listener->mIsChrome =
mIsMainThreadELM && nsContentUtils::LegacyIsCallerChromeOrNativeCode();
// Detect the type of event listener.
if (aFlags.mListenerIsJSListener) {
MOZ_ASSERT(!aListenerHolder.HasWebIDLCallback());
listener->mListenerType = Listener::eJSEventListener;
} else if (aListenerHolder.HasWebIDLCallback()) {
listener->mListenerType = Listener::eWebIDLListener;
} else {
listener->mListenerType = Listener::eNativeListener;
}
listener->mListener = std::move(aListenerHolder);
if (aSignal) {
listener->mSignalFollower = new ListenerSignalFollower(this, listener);
listener->mSignalFollower->Follow(aSignal);
}
if (aFlags.mInSystemGroup) {
mMayHaveSystemGroupListeners = true;
}
if (aFlags.mCapture) {
mMayHaveCapturingListeners = true;
}
// Events which are not supported in the running environment is mapped to
// eUnidentifiedEvent. Then, we need to consider the proper event message
// with comparing the atom.
{
EventMessage resolvedEventMessage = aEventMessage;
if (resolvedEventMessage == eUnidentifiedEvent && aTypeAtom->IsStatic()) {
// TouchEvents are registered only when
// nsContentUtils::InitializeTouchEventTable() is called.
if (aTypeAtom == nsGkAtoms::ontouchstart) {
resolvedEventMessage = eTouchStart;
} else if (aTypeAtom == nsGkAtoms::ontouchend) {
resolvedEventMessage = eTouchEnd;
} else if (aTypeAtom == nsGkAtoms::ontouchmove) {
resolvedEventMessage = eTouchMove;
} else if (aTypeAtom == nsGkAtoms::ontouchcancel) {
resolvedEventMessage = eTouchCancel;
}
}
switch (resolvedEventMessage) {
case eAfterPaint:
mMayHavePaintEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasPaintEventListeners();
}
break;
case eLegacySubtreeModified:
case eLegacyNodeInserted:
case eLegacyNodeRemoved:
case eLegacyNodeRemovedFromDocument:
case eLegacyNodeInsertedIntoDocument:
case eLegacyAttrModified:
case eLegacyCharacterDataModified:
// For mutation listeners, we need to update the global bit on the DOM
// window. Otherwise we won't actually fire the mutation event.
mMayHaveMutationListeners = true;
// Go from our target to the nearest enclosing DOM window.
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->WarnOnceAbout(DeprecatedOperations::eMutationEvent);
}
// If resolvedEventMessage is eLegacySubtreeModified, we need to
// listen all mutations. nsContentUtils::HasMutationListeners relies
// on this.
window->SetMutationListeners(
(resolvedEventMessage == eLegacySubtreeModified)
? kAllMutationBits
: MutationBitForEventType(resolvedEventMessage));
}
break;
case ePointerEnter:
case ePointerLeave:
mMayHavePointerEnterLeaveEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
NS_WARNING_ASSERTION(
!nsContentUtils::IsChromeDoc(window->GetExtantDoc()),
"Please do not use pointerenter/leave events in chrome. "
"They are slower than pointerover/out!");
window->SetHasPointerEnterLeaveEventListeners();
}
break;
case eGamepadButtonDown:
case eGamepadButtonUp:
case eGamepadAxisMove:
case eGamepadConnected:
case eGamepadDisconnected:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasGamepadEventListener();
}
break;
case eDeviceOrientation:
case eDeviceOrientationAbsolute:
case eUserProximity:
case eDeviceLight:
case eDeviceMotion:
#if defined(MOZ_WIDGET_ANDROID)
case eOrientationChange:
#endif // #if defined(MOZ_WIDGET_ANDROID)
EnableDevice(resolvedEventMessage);
break;
case eTouchStart:
case eTouchEnd:
case eTouchMove:
case eTouchCancel:
mMayHaveTouchEventListener = true;
// we don't want touchevent listeners added by scrollbars to flip this
// flag so we ignore listeners created with system event flag
if (!aFlags.mInSystemGroup) {
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasTouchEventListeners();
}
}
break;
case eMouseEnter:
case eMouseLeave:
mMayHaveMouseEnterLeaveEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
NS_WARNING_ASSERTION(
!nsContentUtils::IsChromeDoc(window->GetExtantDoc()),
"Please do not use mouseenter/leave events in chrome. "
"They are slower than mouseover/out!");
window->SetHasMouseEnterLeaveEventListeners();
}
break;
case eKeyDown:
case eKeyPress:
case eKeyUp:
if (!aFlags.mInSystemGroup) {
mMayHaveKeyEventListener = true;
}
break;
case eCompositionEnd:
case eCompositionStart:
case eCompositionUpdate:
case eEditorInput:
if (!aFlags.mInSystemGroup) {
mMayHaveInputOrCompositionEventListener = true;
}
break;
case eEditorBeforeInput:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasBeforeInputEventListenersForTelemetry();
}
break;
case eSelectionChange:
mMayHaveSelectionChangeEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasSelectionChangeEventListeners();
}
break;
case eFormSelect:
mMayHaveFormSelectEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasFormSelectEventListeners();
}
break;
case eMarqueeStart:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onstart);
}
}
break;
case eMarqueeBounce:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onbounce);
}
}
break;
case eMarqueeFinish:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onfinish);
}
}
break;
case eScrollPortOverflow:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onoverflow);
}
}
break;
case eScrollPortUnderflow:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onunderflow);
}
}
break;
case eLegacyMouseLineOrPageScroll:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_ondommousescroll);
}
}
break;
case eLegacyMousePixelScroll:
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
if (Document* doc = window->GetExtantDoc()) {
doc->SetUseCounter(eUseCounter_custom_onmozmousepixelscroll);
}
}
break;
case eTransitionStart:
case eTransitionRun:
case eTransitionEnd:
case eTransitionCancel:
case eWebkitTransitionEnd:
mMayHaveTransitionEventListener = true;
if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
window->SetHasTransitionEventListeners();
}
break;
case eFormCheckboxStateChange:
nsContentUtils::SetMayHaveFormCheckboxStateChangeListeners();
break;
case eFormRadioStateChange:
nsContentUtils::SetMayHaveFormRadioStateChangeListeners();
break;
default:
// XXX Use NS_ASSERTION here to print resolvedEventMessage since
// MOZ_ASSERT can take only string literal, not pointer to
// characters.
NS_ASSERTION(
resolvedEventMessage < eLegacyMutationEventFirst ||
resolvedEventMessage > eLegacyMutationEventLast,
nsPrintfCString("You added new mutation event, but it's not "
"handled above, resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onpointerenter,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onpointerleave,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(
resolvedEventMessage < eGamepadEventFirst ||
resolvedEventMessage > eGamepadEventLast,
nsPrintfCString("You added new gamepad event, but it's not "
"handled above, resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ondeviceorientation,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ondeviceorientationabsolute,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onuserproximity,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ondevicelight,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ondevicemotion,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
#if defined(MOZ_WIDGET_ANDROID)
NS_ASSERTION(aTypeAtom != nsGkAtoms::onorientationchange,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
#endif // #if defined(MOZ_WIDGET_ANDROID)
NS_ASSERTION(aTypeAtom != nsGkAtoms::ontouchstart,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ontouchend,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ontouchmove,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::ontouchcancel,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onmouseenter,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onmouseleave,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onkeydown,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onkeypress,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onkeyup,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::oncompositionend,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::oncompositionstart,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::oncompositionupdate,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::oninput,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onbeforeinput,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onselectionchange,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onselect,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onstart,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onbounce,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onfinish,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onoverflow,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onunderflow,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onDOMMouseScroll,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
NS_ASSERTION(aTypeAtom != nsGkAtoms::onMozMousePixelScroll,
nsPrintfCString("resolvedEventMessage=%s",
ToChar(resolvedEventMessage))
.get());
break;
}
}
if (IsApzAwareListener(listener)) {
ProcessApzAwareEventListenerAdd();
}
if (mTarget) {
mTarget->EventListenerAdded(aTypeAtom);
}
if (mIsMainThreadELM && mTarget) {
EventListenerService::NotifyAboutMainThreadListenerChange(mTarget,
aTypeAtom);
}
if (!mHasNonPrivilegedClickListeners || mUnknownNonPrivilegedClickListeners) {
if (IsNonChromeClickListener(listener)) {
mHasNonPrivilegedClickListeners = true;
mUnknownNonPrivilegedClickListeners = false;
}
}
}
void EventListenerManager::ProcessApzAwareEventListenerAdd() {
Document* doc = nullptr;
// Mark the node as having apz aware listeners
if (nsINode* node = nsINode::FromEventTargetOrNull(mTarget)) {
node->SetMayBeApzAware();
doc = node->OwnerDoc();
}
// Schedule a paint so event regions on the layer tree gets updated
if (!doc) {
if (nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow()) {
doc = window->GetExtantDoc();
}
}
if (!doc) {
if (nsCOMPtr<DOMEventTargetHelper> helper = do_QueryInterface(mTarget)) {
if (nsPIDOMWindowInner* window = helper->GetOwner()) {
doc = window->GetExtantDoc();
}
}
}
if (doc && gfxPlatform::AsyncPanZoomEnabled()) {
PresShell* presShell = doc->GetPresShell();
if (presShell) {
nsIFrame* f = presShell->GetRootFrame();
if (f) {
f->SchedulePaint();
}
}
}
}
bool EventListenerManager::IsDeviceType(EventMessage aEventMessage) {
switch (aEventMessage) {
case eDeviceOrientation:
case eDeviceOrientationAbsolute:
case eDeviceMotion:
case eDeviceLight:
case eUserProximity:
#if defined(MOZ_WIDGET_ANDROID)
case eOrientationChange:
#endif
return true;
default:
break;
}
return false;
}
void EventListenerManager::EnableDevice(EventMessage aEventMessage) {
nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow();
if (!window) {
return;
}
switch (aEventMessage) {
case eDeviceOrientation:
#ifdef MOZ_WIDGET_ANDROID
// Falls back to SENSOR_ROTATION_VECTOR and SENSOR_ORIENTATION if
// unavailable on device.
window->EnableDeviceSensor(SENSOR_GAME_ROTATION_VECTOR);
window->EnableDeviceSensor(SENSOR_ROTATION_VECTOR);
#else
window->EnableDeviceSensor(SENSOR_ORIENTATION);
#endif
break;
case eDeviceOrientationAbsolute:
#ifdef MOZ_WIDGET_ANDROID
// Falls back to SENSOR_ORIENTATION if unavailable on device.
window->EnableDeviceSensor(SENSOR_ROTATION_VECTOR);
#else
window->EnableDeviceSensor(SENSOR_ORIENTATION);
#endif
break;
case eUserProximity:
window->EnableDeviceSensor(SENSOR_PROXIMITY);
break;
case eDeviceLight:
window->EnableDeviceSensor(SENSOR_LIGHT);
break;
case eDeviceMotion:
window->EnableDeviceSensor(SENSOR_ACCELERATION);
window->EnableDeviceSensor(SENSOR_LINEAR_ACCELERATION);
window->EnableDeviceSensor(SENSOR_GYROSCOPE);
break;
#if defined(MOZ_WIDGET_ANDROID)
case eOrientationChange:
window->EnableOrientationChangeListener();
break;
#endif
default:
NS_WARNING("Enabling an unknown device sensor.");
break;
}
}
void EventListenerManager::DisableDevice(EventMessage aEventMessage) {
nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow();
if (!window) {
return;
}
switch (aEventMessage) {
case eDeviceOrientation:
#ifdef MOZ_WIDGET_ANDROID
// Disable all potential fallback sensors.
window->DisableDeviceSensor(SENSOR_GAME_ROTATION_VECTOR);
window->DisableDeviceSensor(SENSOR_ROTATION_VECTOR);
#endif
window->DisableDeviceSensor(SENSOR_ORIENTATION);
break;
case eDeviceOrientationAbsolute:
#ifdef MOZ_WIDGET_ANDROID
window->DisableDeviceSensor(SENSOR_ROTATION_VECTOR);
#endif
window->DisableDeviceSensor(SENSOR_ORIENTATION);
break;
case eDeviceMotion:
window->DisableDeviceSensor(SENSOR_ACCELERATION);
window->DisableDeviceSensor(SENSOR_LINEAR_ACCELERATION);
window->DisableDeviceSensor(SENSOR_GYROSCOPE);
break;
case eUserProximity:
window->DisableDeviceSensor(SENSOR_PROXIMITY);
break;
case eDeviceLight:
window->DisableDeviceSensor(SENSOR_LIGHT);
break;
#if defined(MOZ_WIDGET_ANDROID)
case eOrientationChange:
window->DisableOrientationChangeListener();
break;
#endif
default:
NS_WARNING("Disabling an unknown device sensor.");
break;
}
}
void EventListenerManager::NotifyEventListenerRemoved(nsAtom* aUserType) {
// If the following code is changed, other callsites of EventListenerRemoved
// and NotifyAboutMainThreadListenerChange should be changed too.
ClearNoListenersForEvents();
mNoListenerForEventAtom = nullptr;
if (mTarget) {
mTarget->EventListenerRemoved(aUserType);
}
if (mIsMainThreadELM && mTarget) {
EventListenerService::NotifyAboutMainThreadListenerChange(mTarget,
aUserType);
}
}
void EventListenerManager::RemoveEventListenerInternal(
EventListenerHolder aListenerHolder, EventMessage aEventMessage,
nsAtom* aUserType, const EventListenerFlags& aFlags, bool aAllEvents) {
if (!aListenerHolder || !aEventMessage || mClearingListeners) {
return;
}
Listener* listener;
uint32_t count = mListeners.Length();
bool deviceType = IsDeviceType(aEventMessage);
RefPtr<EventListenerManager> kungFuDeathGrip(this);
for (uint32_t i = 0; i < count; ++i) {
listener = &mListeners.ElementAt(i);
if (EVENT_TYPE_EQUALS(listener, aEventMessage, aUserType, aAllEvents)) {
if (listener->mListener == aListenerHolder &&
listener->mFlags.EqualsForRemoval(aFlags)) {
if (IsNonChromeClickListener(listener)) {
mUnknownNonPrivilegedClickListeners = true;
}
mListeners.RemoveElementAt(i);
NotifyEventListenerRemoved(aUserType);
if (!aAllEvents && deviceType) {
DisableDevice(aEventMessage);
}
return;
}
}
}
}
bool EventListenerManager::HasNonPrivilegedClickListeners() {
if (mUnknownNonPrivilegedClickListeners) {
Listener* listener;
mUnknownNonPrivilegedClickListeners = false;
for (uint32_t i = 0; i < mListeners.Length(); ++i) {
listener = &mListeners.ElementAt(i);
if (IsNonChromeClickListener(listener)) {
mHasNonPrivilegedClickListeners = true;
return mHasNonPrivilegedClickListeners;
}
}
mHasNonPrivilegedClickListeners = false;
}
return mHasNonPrivilegedClickListeners;
}
bool EventListenerManager::ListenerCanHandle(const Listener* aListener,
const WidgetEvent* aEvent,
EventMessage aEventMessage) const
{
MOZ_ASSERT(aEventMessage == aEvent->mMessage ||
aEventMessage == GetLegacyEventMessage(aEvent->mMessage),
"aEvent and aEventMessage should agree, modulo legacyness");
// The listener has been removed, it cannot handle anything.
if (aListener->mListenerType == Listener::eNoListener) {
return false;
}
// The listener has been disabled, for example by devtools.
if (!aListener->mEnabled) {
return false;
}
// This is slightly different from EVENT_TYPE_EQUALS in that it returns
// true even when aEvent->mMessage == eUnidentifiedEvent and
// aListener=>mEventMessage != eUnidentifiedEvent as long as the atoms are
// the same
if (MOZ_UNLIKELY(aListener->mAllEvents)) {
return true;
}
if (aEvent->mMessage == eUnidentifiedEvent) {
return aListener->mTypeAtom == aEvent->mSpecifiedEventType;
}
MOZ_ASSERT(mIsMainThreadELM);
return aListener->mEventMessage == aEventMessage;
}
static bool IsDefaultPassiveWhenOnRoot(EventMessage aMessage) {
if (aMessage == eTouchStart || aMessage == eTouchMove) {
return StaticPrefs::dom_event_default_to_passive_touch_listeners();
}
if (aMessage == eWheel || aMessage == eLegacyMouseLineOrPageScroll ||
aMessage == eLegacyMousePixelScroll) {
return StaticPrefs::dom_event_default_to_passive_wheel_listeners();
}
return false;
}
static bool IsRootEventTarget(EventTarget* aTarget) {
if (!aTarget) {
return false;
}
if (aTarget->IsInnerWindow()) {
return true;
}
const nsINode* node = nsINode::FromEventTarget(aTarget);
if (!node) {
return false;
}
Document* doc = node->OwnerDoc();
return node == doc || node == doc->GetRootElement() || node == doc->GetBody();
}
void EventListenerManager::MaybeMarkPassive(EventMessage aMessage,
EventListenerFlags& aFlags) {
if (!mIsMainThreadELM) {
return;
}
if (!IsDefaultPassiveWhenOnRoot(aMessage)) {
return;
}
if (!IsRootEventTarget(mTarget)) {
return;
}
aFlags.mPassive = true;
}
void EventListenerManager::AddEventListenerByType(
EventListenerHolder aListenerHolder, const nsAString& aType,
const EventListenerFlags& aFlags, const Optional<bool>& aPassive,
AbortSignal* aSignal) {
RefPtr<nsAtom> atom;
EventMessage message =
GetEventMessageAndAtomForListener(aType, getter_AddRefs(atom));
EventListenerFlags flags = aFlags;
if (aPassive.WasPassed()) {
flags.mPassive = aPassive.Value();
} else {
MaybeMarkPassive(message, flags);
}
AddEventListenerInternal(std::move(aListenerHolder), message, atom, flags,
false, false, aSignal);
}
void EventListenerManager::RemoveEventListenerByType(
EventListenerHolder aListenerHolder, const nsAString& aType,
const EventListenerFlags& aFlags) {
RefPtr<nsAtom> atom;
EventMessage message =
GetEventMessageAndAtomForListener(aType, getter_AddRefs(atom));
RemoveEventListenerInternal(std::move(aListenerHolder), message, atom,
aFlags);
}
EventListenerManager::Listener* EventListenerManager::FindEventHandler(
EventMessage aEventMessage, nsAtom* aTypeAtom) {
// Run through the listeners for this type and see if a script
// listener is registered
Listener* listener;
uint32_t count = mListeners.Length();
for (uint32_t i = 0; i < count; ++i) {
listener = &mListeners.ElementAt(i);
if (listener->mListenerIsHandler &&
EVENT_TYPE_EQUALS(listener, aEventMessage, aTypeAtom, false)) {
return listener;
}
}
return nullptr;
}
EventListenerManager::Listener* EventListenerManager::SetEventHandlerInternal(
nsAtom* aName, const TypedEventHandler& aTypedHandler,
bool aPermitUntrustedEvents) {
MOZ_ASSERT(aName);
EventMessage eventMessage = GetEventMessage(aName);
Listener* listener = FindEventHandler(eventMessage, aName);
if (!listener) {
// If we didn't find a script listener or no listeners existed
// create and add a new one.
EventListenerFlags flags;
flags.mListenerIsJSListener = true;
MaybeMarkPassive(eventMessage, flags);
nsCOMPtr<JSEventHandler> jsEventHandler;
NS_NewJSEventHandler(mTarget, aName, aTypedHandler,
getter_AddRefs(jsEventHandler));
AddEventListenerInternal(EventListenerHolder(jsEventHandler), eventMessage,
aName, flags, true);
listener = FindEventHandler(eventMessage, aName);
} else {
JSEventHandler* jsEventHandler = listener->GetJSEventHandler();
MOZ_ASSERT(jsEventHandler,
"How can we have an event handler with no JSEventHandler?");
bool same = jsEventHandler->GetTypedEventHandler() == aTypedHandler;
// Possibly the same listener, but update still the context and scope.
jsEventHandler->SetHandler(aTypedHandler);