зеркало из https://github.com/mozilla/gecko-dev.git
1743 строки
61 KiB
C++
1743 строки
61 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Microsoft's API Name hackery sucks
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#undef CreateEvent
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#include "mozilla/BasicEvents.h"
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#include "mozilla/CycleCollectedJSRuntime.h"
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#include "mozilla/DOMEventTargetHelper.h"
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#include "mozilla/EventDispatcher.h"
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#include "mozilla/EventListenerManager.h"
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#include "mozilla/HalSensor.h"
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#include "mozilla/InternalMutationEvent.h"
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#include "mozilla/JSEventHandler.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Preferences.h"
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#include "mozilla/dom/BindingUtils.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/Event.h"
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#include "mozilla/dom/EventTargetBinding.h"
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#include "mozilla/dom/LoadedScript.h"
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#include "mozilla/dom/PopupBlocker.h"
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#include "mozilla/dom/ScriptLoader.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/TouchEvent.h"
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#include "mozilla/TimelineConsumers.h"
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#include "mozilla/EventTimelineMarker.h"
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#include "mozilla/TimeStamp.h"
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#include "EventListenerService.h"
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#include "nsCOMArray.h"
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#include "nsCOMPtr.h"
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#include "nsContentUtils.h"
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#include "nsDOMCID.h"
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#include "nsError.h"
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#include "nsGkAtoms.h"
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#include "nsIContent.h"
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#include "nsIContentSecurityPolicy.h"
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#include "mozilla/dom/Document.h"
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#include "nsIDOMEventListener.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsISupports.h"
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#include "nsISupportsPrimitives.h"
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#include "nsIXPConnect.h"
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#include "nsJSUtils.h"
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#include "nsNameSpaceManager.h"
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#include "nsPIDOMWindow.h"
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#include "nsSandboxFlags.h"
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#include "xpcpublic.h"
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#include "nsIFrame.h"
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#include "nsDisplayList.h"
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namespace mozilla {
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using namespace dom;
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using namespace hal;
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#define EVENT_TYPE_EQUALS(ls, message, userType, allEvents) \
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((ls->mEventMessage == message && \
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(ls->mEventMessage != eUnidentifiedEvent || ls->mTypeAtom == userType)) || \
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(allEvents && ls->mAllEvents))
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static const uint32_t kAllMutationBits =
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NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED |
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NS_EVENT_BITS_MUTATION_NODEINSERTED | NS_EVENT_BITS_MUTATION_NODEREMOVED |
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NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT |
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NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT |
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NS_EVENT_BITS_MUTATION_ATTRMODIFIED |
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NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED;
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static uint32_t MutationBitForEventType(EventMessage aEventType) {
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switch (aEventType) {
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case eLegacySubtreeModified:
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return NS_EVENT_BITS_MUTATION_SUBTREEMODIFIED;
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case eLegacyNodeInserted:
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return NS_EVENT_BITS_MUTATION_NODEINSERTED;
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case eLegacyNodeRemoved:
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return NS_EVENT_BITS_MUTATION_NODEREMOVED;
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case eLegacyNodeRemovedFromDocument:
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return NS_EVENT_BITS_MUTATION_NODEREMOVEDFROMDOCUMENT;
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case eLegacyNodeInsertedIntoDocument:
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return NS_EVENT_BITS_MUTATION_NODEINSERTEDINTODOCUMENT;
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case eLegacyAttrModified:
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return NS_EVENT_BITS_MUTATION_ATTRMODIFIED;
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case eLegacyCharacterDataModified:
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return NS_EVENT_BITS_MUTATION_CHARACTERDATAMODIFIED;
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default:
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break;
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}
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return 0;
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}
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uint32_t EventListenerManager::sMainThreadCreatedCount = 0;
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static bool IsWebkitPrefixSupportEnabled() {
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static bool sIsWebkitPrefixSupportEnabled;
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static bool sIsPrefCached = false;
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if (!sIsPrefCached) {
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sIsPrefCached = true;
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Preferences::AddBoolVarCache(&sIsWebkitPrefixSupportEnabled,
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"layout.css.prefixes.webkit");
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}
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return sIsWebkitPrefixSupportEnabled;
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}
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EventListenerManagerBase::EventListenerManagerBase()
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: mNoListenerForEvent(eVoidEvent),
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mMayHavePaintEventListener(false),
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mMayHaveMutationListeners(false),
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mMayHaveCapturingListeners(false),
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mMayHaveSystemGroupListeners(false),
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mMayHaveTouchEventListener(false),
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mMayHaveMouseEnterLeaveEventListener(false),
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mMayHavePointerEnterLeaveEventListener(false),
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mMayHaveKeyEventListener(false),
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mMayHaveInputOrCompositionEventListener(false),
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mMayHaveSelectionChangeEventListener(false),
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mClearingListeners(false),
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mIsMainThreadELM(NS_IsMainThread()) {
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static_assert(sizeof(EventListenerManagerBase) == sizeof(uint32_t),
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"Keep the size of EventListenerManagerBase size compact!");
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}
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EventListenerManager::EventListenerManager(EventTarget* aTarget)
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: EventListenerManagerBase(), mTarget(aTarget) {
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NS_ASSERTION(aTarget, "unexpected null pointer");
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if (mIsMainThreadELM) {
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++sMainThreadCreatedCount;
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}
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}
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EventListenerManager::~EventListenerManager() {
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// If your code fails this assertion, a possible reason is that
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// a class did not call our Disconnect() manually. Note that
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// this class can have Disconnect called in one of two ways:
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// if it is part of a cycle, then in Unlink() (such a cycle
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// would be with one of the listeners, not mTarget which is weak).
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// If not part of a cycle, then Disconnect must be called manually,
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// typically from the destructor of the owner class (mTarget).
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// XXX azakai: Is there any reason to not just call Disconnect
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// from right here, if not previously called?
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NS_ASSERTION(!mTarget, "didn't call Disconnect");
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RemoveAllListeners();
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}
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void EventListenerManager::RemoveAllListeners() {
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if (mClearingListeners) {
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return;
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}
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mClearingListeners = true;
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mListeners.Clear();
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mClearingListeners = false;
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}
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NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(EventListenerManager, AddRef)
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NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(EventListenerManager, Release)
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inline void ImplCycleCollectionTraverse(
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nsCycleCollectionTraversalCallback& aCallback,
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EventListenerManager::Listener& aField, const char* aName,
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unsigned aFlags) {
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if (MOZ_UNLIKELY(aCallback.WantDebugInfo())) {
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nsAutoCString name;
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name.AppendASCII(aName);
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if (aField.mTypeAtom) {
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name.AppendLiteral(" event=");
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name.Append(nsAtomCString(aField.mTypeAtom));
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name.AppendLiteral(" listenerType=");
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name.AppendInt(aField.mListenerType);
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name.AppendLiteral(" ");
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}
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CycleCollectionNoteChild(aCallback, aField.mListener.GetISupports(),
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name.get(), aFlags);
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} else {
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CycleCollectionNoteChild(aCallback, aField.mListener.GetISupports(), aName,
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aFlags);
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}
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}
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NS_IMPL_CYCLE_COLLECTION_CLASS(EventListenerManager)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(EventListenerManager)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mListeners)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(EventListenerManager)
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tmp->Disconnect();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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nsPIDOMWindowInner* EventListenerManager::GetInnerWindowForTarget() {
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nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
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if (node) {
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// XXX sXBL/XBL2 issue -- do we really want the owner here? What
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// if that's the XBL document?
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return node->OwnerDoc()->GetInnerWindow();
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}
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nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow();
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return window;
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}
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already_AddRefed<nsPIDOMWindowInner>
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EventListenerManager::GetTargetAsInnerWindow() const {
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nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(mTarget);
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return window.forget();
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}
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void EventListenerManager::AddEventListenerInternal(
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EventListenerHolder aListenerHolder, EventMessage aEventMessage,
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nsAtom* aTypeAtom, const EventListenerFlags& aFlags, bool aHandler,
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bool aAllEvents) {
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MOZ_ASSERT((aEventMessage && aTypeAtom) || aAllEvents, // all-events listener
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"Missing type");
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if (!aListenerHolder || mClearingListeners) {
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return;
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}
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// Since there is no public API to call us with an EventListenerHolder, we
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// know that there's an EventListenerHolder on the stack holding a strong ref
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// to the listener.
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Listener* listener;
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uint32_t count = mListeners.Length();
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for (uint32_t i = 0; i < count; i++) {
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listener = &mListeners.ElementAt(i);
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// mListener == aListenerHolder is the last one, since it can be a bit slow.
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if (listener->mListenerIsHandler == aHandler &&
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listener->mFlags.EqualsForAddition(aFlags) &&
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EVENT_TYPE_EQUALS(listener, aEventMessage, aTypeAtom, aAllEvents) &&
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listener->mListener == aListenerHolder) {
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return;
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}
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}
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mNoListenerForEvent = eVoidEvent;
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mNoListenerForEventAtom = nullptr;
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listener =
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aAllEvents ? mListeners.InsertElementAt(0) : mListeners.AppendElement();
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listener->mEventMessage = aEventMessage;
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listener->mTypeAtom = aTypeAtom;
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listener->mFlags = aFlags;
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listener->mListenerIsHandler = aHandler;
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listener->mHandlerIsString = false;
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listener->mAllEvents = aAllEvents;
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listener->mIsChrome =
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mIsMainThreadELM && nsContentUtils::LegacyIsCallerChromeOrNativeCode();
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// Detect the type of event listener.
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if (aFlags.mListenerIsJSListener) {
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MOZ_ASSERT(!aListenerHolder.HasWebIDLCallback());
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listener->mListenerType = Listener::eJSEventListener;
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} else if (aListenerHolder.HasWebIDLCallback()) {
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listener->mListenerType = Listener::eWebIDLListener;
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} else {
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listener->mListenerType = Listener::eNativeListener;
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}
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listener->mListener = std::move(aListenerHolder);
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if (aFlags.mInSystemGroup) {
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mMayHaveSystemGroupListeners = true;
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}
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if (aFlags.mCapture) {
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mMayHaveCapturingListeners = true;
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}
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if (aEventMessage == eAfterPaint) {
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mMayHavePaintEventListener = true;
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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window->SetHasPaintEventListeners();
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}
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} else if (aEventMessage >= eLegacyMutationEventFirst &&
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aEventMessage <= eLegacyMutationEventLast) {
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// For mutation listeners, we need to update the global bit on the DOM
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// window. Otherwise we won't actually fire the mutation event.
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mMayHaveMutationListeners = true;
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// Go from our target to the nearest enclosing DOM window.
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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nsCOMPtr<Document> doc = window->GetExtantDoc();
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if (doc) {
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doc->WarnOnceAbout(Document::eMutationEvent);
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if (aEventMessage == eLegacyAttrModified) {
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doc->WarnOnceAbout(Document::eDOMAttrModifiedEvent);
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}
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}
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// If aEventMessage is eLegacySubtreeModified, we need to listen all
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// mutations. nsContentUtils::HasMutationListeners relies on this.
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window->SetMutationListeners(
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(aEventMessage == eLegacySubtreeModified)
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? kAllMutationBits
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: MutationBitForEventType(aEventMessage));
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}
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} else if (aTypeAtom == nsGkAtoms::ondeviceorientation) {
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EnableDevice(eDeviceOrientation);
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} else if (aTypeAtom == nsGkAtoms::onabsolutedeviceorientation) {
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EnableDevice(eAbsoluteDeviceOrientation);
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} else if (aTypeAtom == nsGkAtoms::ondeviceproximity ||
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aTypeAtom == nsGkAtoms::onuserproximity) {
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EnableDevice(eDeviceProximity);
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} else if (aTypeAtom == nsGkAtoms::ondevicelight) {
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EnableDevice(eDeviceLight);
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} else if (aTypeAtom == nsGkAtoms::ondevicemotion) {
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EnableDevice(eDeviceMotion);
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#if defined(MOZ_WIDGET_ANDROID)
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} else if (aTypeAtom == nsGkAtoms::onorientationchange) {
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EnableDevice(eOrientationChange);
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#endif
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} else if (aTypeAtom == nsGkAtoms::ontouchstart ||
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aTypeAtom == nsGkAtoms::ontouchend ||
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aTypeAtom == nsGkAtoms::ontouchmove ||
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aTypeAtom == nsGkAtoms::ontouchcancel) {
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mMayHaveTouchEventListener = true;
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nsPIDOMWindowInner* window = GetInnerWindowForTarget();
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// we don't want touchevent listeners added by scrollbars to flip this flag
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// so we ignore listeners created with system event flag
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if (window && !aFlags.mInSystemGroup) {
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window->SetHasTouchEventListeners();
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}
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} else if (aEventMessage >= ePointerEventFirst &&
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aEventMessage <= ePointerEventLast) {
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nsPIDOMWindowInner* window = GetInnerWindowForTarget();
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if (aTypeAtom == nsGkAtoms::onpointerenter ||
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aTypeAtom == nsGkAtoms::onpointerleave) {
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mMayHavePointerEnterLeaveEventListener = true;
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if (window) {
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#ifdef DEBUG
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nsCOMPtr<Document> d = window->GetExtantDoc();
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NS_WARNING_ASSERTION(
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!nsContentUtils::IsChromeDoc(d),
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"Please do not use pointerenter/leave events in chrome. "
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"They are slower than pointerover/out!");
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#endif
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window->SetHasPointerEnterLeaveEventListeners();
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}
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}
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} else if (aTypeAtom == nsGkAtoms::onmouseenter ||
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aTypeAtom == nsGkAtoms::onmouseleave) {
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mMayHaveMouseEnterLeaveEventListener = true;
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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#ifdef DEBUG
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nsCOMPtr<Document> d = window->GetExtantDoc();
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NS_WARNING_ASSERTION(
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!nsContentUtils::IsChromeDoc(d),
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"Please do not use mouseenter/leave events in chrome. "
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"They are slower than mouseover/out!");
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#endif
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window->SetHasMouseEnterLeaveEventListeners();
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}
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} else if (aEventMessage >= eGamepadEventFirst &&
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aEventMessage <= eGamepadEventLast) {
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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window->SetHasGamepadEventListener();
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}
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} else if (aTypeAtom == nsGkAtoms::onkeydown ||
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aTypeAtom == nsGkAtoms::onkeypress ||
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aTypeAtom == nsGkAtoms::onkeyup) {
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if (!aFlags.mInSystemGroup) {
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mMayHaveKeyEventListener = true;
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}
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} else if (aTypeAtom == nsGkAtoms::oncompositionend ||
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aTypeAtom == nsGkAtoms::oncompositionstart ||
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aTypeAtom == nsGkAtoms::oncompositionupdate ||
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aTypeAtom == nsGkAtoms::oninput) {
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if (!aFlags.mInSystemGroup) {
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mMayHaveInputOrCompositionEventListener = true;
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}
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} else if (aEventMessage == eSelectionChange) {
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mMayHaveSelectionChangeEventListener = true;
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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window->SetHasSelectionChangeEventListeners();
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}
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} else if (aTypeAtom == nsGkAtoms::onstart) {
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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nsCOMPtr<Document> doc = window->GetExtantDoc();
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if (doc) {
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doc->SetDocumentAndPageUseCounter(eUseCounter_custom_onstart);
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}
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}
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} else if (aTypeAtom == nsGkAtoms::onbounce) {
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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nsCOMPtr<Document> doc = window->GetExtantDoc();
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if (doc) {
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doc->SetDocumentAndPageUseCounter(eUseCounter_custom_onbounce);
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}
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}
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} else if (aTypeAtom == nsGkAtoms::onfinish) {
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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nsCOMPtr<Document> doc = window->GetExtantDoc();
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if (doc) {
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doc->SetDocumentAndPageUseCounter(eUseCounter_custom_onfinish);
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}
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}
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} else if (aTypeAtom == nsGkAtoms::ontext) {
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// Ignore event listeners in the system group since editor needs to
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// listen "text" events in the system group.
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if (!aFlags.mInSystemGroup) {
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if (nsPIDOMWindowInner* window = GetInnerWindowForTarget()) {
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window->SetHasTextEventListenerInDefaultGroup();
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}
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}
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}
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if (IsApzAwareListener(listener)) {
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ProcessApzAwareEventListenerAdd();
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}
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if (mTarget) {
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mTarget->EventListenerAdded(aTypeAtom);
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}
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if (mIsMainThreadELM && mTarget) {
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EventListenerService::NotifyAboutMainThreadListenerChange(mTarget,
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aTypeAtom);
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}
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}
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void EventListenerManager::ProcessApzAwareEventListenerAdd() {
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// Mark the node as having apz aware listeners
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nsCOMPtr<nsINode> node = do_QueryInterface(mTarget);
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if (node) {
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node->SetMayBeApzAware();
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}
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// Schedule a paint so event regions on the layer tree gets updated
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Document* doc = nullptr;
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if (node) {
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doc = node->OwnerDoc();
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}
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if (!doc) {
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if (nsCOMPtr<nsPIDOMWindowInner> window = GetTargetAsInnerWindow()) {
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doc = window->GetExtantDoc();
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}
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}
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if (!doc) {
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if (nsCOMPtr<DOMEventTargetHelper> helper = do_QueryInterface(mTarget)) {
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if (nsPIDOMWindowInner* window = helper->GetOwner()) {
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doc = window->GetExtantDoc();
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}
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}
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}
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if (doc && gfxPlatform::AsyncPanZoomEnabled()) {
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nsIPresShell* ps = doc->GetShell();
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if (ps) {
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nsIFrame* f = ps->GetRootFrame();
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if (f) {
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f->SchedulePaint();
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}
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}
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}
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}
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bool EventListenerManager::IsDeviceType(EventMessage aEventMessage) {
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switch (aEventMessage) {
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case eDeviceOrientation:
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case eAbsoluteDeviceOrientation:
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case eDeviceMotion:
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case eDeviceLight:
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case eDeviceProximity:
|
|
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 eAbsoluteDeviceOrientation:
|
|
#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 eDeviceProximity:
|
|
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 eAbsoluteDeviceOrientation:
|
|
#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 eDeviceProximity:
|
|
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.
|
|
mNoListenerForEvent = eVoidEvent;
|
|
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)) {
|
|
mListeners.RemoveElementAt(i);
|
|
NotifyEventListenerRemoved(aUserType);
|
|
if (!aAllEvents && deviceType) {
|
|
DisableDevice(aEventMessage);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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;
|
|
}
|
|
// 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;
|
|
}
|
|
if (MOZ_UNLIKELY(!nsContentUtils::IsUnprefixedFullscreenApiEnabled() &&
|
|
aEvent->IsTrusted() &&
|
|
(aEventMessage == eFullscreenChange ||
|
|
aEventMessage == eFullscreenError))) {
|
|
// If unprefixed Fullscreen API is not enabled, don't dispatch it
|
|
// to the content.
|
|
if (!aEvent->mFlags.mInSystemGroup && !aListener->mIsChrome) {
|
|
return false;
|
|
}
|
|
}
|
|
MOZ_ASSERT(mIsMainThreadELM);
|
|
return aListener->mEventMessage == aEventMessage;
|
|
}
|
|
|
|
static bool DefaultToPassiveTouchListeners() {
|
|
static bool sDefaultToPassiveTouchListeners = false;
|
|
static bool sIsPrefCached = false;
|
|
|
|
if (!sIsPrefCached) {
|
|
sIsPrefCached = true;
|
|
Preferences::AddBoolVarCache(
|
|
&sDefaultToPassiveTouchListeners,
|
|
"dom.event.default_to_passive_touch_listeners");
|
|
}
|
|
|
|
return sDefaultToPassiveTouchListeners;
|
|
}
|
|
|
|
void EventListenerManager::AddEventListenerByType(
|
|
EventListenerHolder aListenerHolder, const nsAString& aType,
|
|
const EventListenerFlags& aFlags, const Optional<bool>& aPassive) {
|
|
RefPtr<nsAtom> atom;
|
|
EventMessage message =
|
|
GetEventMessageAndAtomForListener(aType, getter_AddRefs(atom));
|
|
|
|
EventListenerFlags flags = aFlags;
|
|
if (aPassive.WasPassed()) {
|
|
flags.mPassive = aPassive.Value();
|
|
} else if ((message == eTouchStart || message == eTouchMove) &&
|
|
mIsMainThreadELM && DefaultToPassiveTouchListeners()) {
|
|
nsCOMPtr<nsINode> node;
|
|
nsCOMPtr<nsPIDOMWindowInner> win;
|
|
if ((win = GetTargetAsInnerWindow()) ||
|
|
((node = do_QueryInterface(mTarget)) &&
|
|
(node == node->OwnerDoc() ||
|
|
node == node->OwnerDoc()->GetRootElement() ||
|
|
node == node->OwnerDoc()->GetBody()))) {
|
|
flags.mPassive = true;
|
|
}
|
|
}
|
|
|
|
AddEventListenerInternal(std::move(aListenerHolder), message, atom, flags);
|
|
}
|
|
|
|
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;
|
|
|
|
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);
|
|
if (mTarget && !same) {
|
|
mTarget->EventListenerRemoved(aName);
|
|
mTarget->EventListenerAdded(aName);
|
|
}
|
|
if (mIsMainThreadELM && mTarget) {
|
|
EventListenerService::NotifyAboutMainThreadListenerChange(mTarget, aName);
|
|
}
|
|
}
|
|
|
|
// Set flag to indicate possible need for compilation later
|
|
listener->mHandlerIsString = !aTypedHandler.HasEventHandler();
|
|
if (aPermitUntrustedEvents) {
|
|
listener->mFlags.mAllowUntrustedEvents = true;
|
|
}
|
|
|
|
return listener;
|
|
}
|
|
|
|
nsresult EventListenerManager::SetEventHandler(nsAtom* aName,
|
|
const nsAString& aBody,
|
|
bool aDeferCompilation,
|
|
bool aPermitUntrustedEvents,
|
|
Element* aElement) {
|
|
nsCOMPtr<Document> doc;
|
|
nsCOMPtr<nsIScriptGlobalObject> global =
|
|
GetScriptGlobalAndDocument(getter_AddRefs(doc));
|
|
|
|
if (!global) {
|
|
// This can happen; for example this document might have been
|
|
// loaded as data.
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
// return early preventing the event listener from being added
|
|
// 'doc' is fetched above
|
|
if (doc) {
|
|
// Don't allow adding an event listener if the document is sandboxed
|
|
// without 'allow-scripts'.
|
|
if (doc->HasScriptsBlockedBySandbox()) {
|
|
return NS_ERROR_DOM_SECURITY_ERR;
|
|
}
|
|
|
|
// Perform CSP check
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
rv = doc->NodePrincipal()->GetCsp(getter_AddRefs(csp));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
unsigned lineNum = 0;
|
|
unsigned columnNum = 0;
|
|
|
|
JSContext* cx = nsContentUtils::GetCurrentJSContext();
|
|
if (cx && !JS::DescribeScriptedCaller(cx, nullptr, &lineNum, &columnNum)) {
|
|
JS_ClearPendingException(cx);
|
|
}
|
|
|
|
if (csp) {
|
|
bool allowsInlineScript = true;
|
|
rv = csp->GetAllowsInline(
|
|
nsIContentPolicy::TYPE_SCRIPT,
|
|
EmptyString(), // aNonce
|
|
true, // aParserCreated (true because attribute event handler)
|
|
aElement,
|
|
nullptr, // nsICSPEventListener
|
|
aBody, lineNum, columnNum, &allowsInlineScript);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// return early if CSP wants us to block inline scripts
|
|
if (!allowsInlineScript) {
|
|
return NS_OK;
|
|
}
|
|
}
|
|
}
|
|
|
|
// This might be the first reference to this language in the global
|
|
// We must init the language before we attempt to fetch its context.
|
|
if (NS_FAILED(global->EnsureScriptEnvironment())) {
|
|
NS_WARNING("Failed to setup script environment for this language");
|
|
// but fall through and let the inevitable failure below handle it.
|
|
}
|
|
|
|
nsIScriptContext* context = global->GetScriptContext();
|
|
NS_ENSURE_TRUE(context, NS_ERROR_FAILURE);
|
|
NS_ENSURE_STATE(global->GetGlobalJSObject());
|
|
|
|
Listener* listener = SetEventHandlerInternal(aName, TypedEventHandler(),
|
|
aPermitUntrustedEvents);
|
|
|
|
if (!aDeferCompilation) {
|
|
return CompileEventHandlerInternal(listener, &aBody, aElement);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void EventListenerManager::RemoveEventHandler(nsAtom* aName) {
|
|
if (mClearingListeners) {
|
|
return;
|
|
}
|
|
|
|
EventMessage eventMessage = GetEventMessage(aName);
|
|
Listener* listener = FindEventHandler(eventMessage, aName);
|
|
|
|
if (listener) {
|
|
mListeners.RemoveElementAt(uint32_t(listener - &mListeners.ElementAt(0)));
|
|
NotifyEventListenerRemoved(aName);
|
|
if (IsDeviceType(eventMessage)) {
|
|
DisableDevice(eventMessage);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult EventListenerManager::CompileEventHandlerInternal(
|
|
Listener* aListener, const nsAString* aBody, Element* aElement) {
|
|
MOZ_ASSERT(aListener->GetJSEventHandler());
|
|
MOZ_ASSERT(aListener->mHandlerIsString,
|
|
"Why are we compiling a non-string JS listener?");
|
|
JSEventHandler* jsEventHandler = aListener->GetJSEventHandler();
|
|
MOZ_ASSERT(!jsEventHandler->GetTypedEventHandler().HasEventHandler(),
|
|
"What is there to compile?");
|
|
|
|
nsresult result = NS_OK;
|
|
nsCOMPtr<Document> doc;
|
|
nsCOMPtr<nsIScriptGlobalObject> global =
|
|
GetScriptGlobalAndDocument(getter_AddRefs(doc));
|
|
NS_ENSURE_STATE(global);
|
|
|
|
// Activate JSAPI, and make sure that exceptions are reported on the right
|
|
// Window.
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(global))) {
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
JSContext* cx = jsapi.cx();
|
|
|
|
RefPtr<nsAtom> typeAtom = aListener->mTypeAtom;
|
|
nsAtom* attrName = typeAtom;
|
|
|
|
// Flag us as not a string so we don't keep trying to compile strings which
|
|
// can't be compiled.
|
|
aListener->mHandlerIsString = false;
|
|
|
|
// mTarget may not be an Element if it's a window and we're
|
|
// getting an inline event listener forwarded from <html:body> or
|
|
// <html:frameset> or <xul:window> or the like.
|
|
// XXX I don't like that we have to reference content from
|
|
// here. The alternative is to store the event handler string on
|
|
// the JSEventHandler itself, and that still doesn't address
|
|
// the arg names issue.
|
|
nsCOMPtr<Element> element = do_QueryInterface(mTarget);
|
|
MOZ_ASSERT(element || aBody, "Where will we get our body?");
|
|
nsAutoString handlerBody;
|
|
const nsAString* body = aBody;
|
|
if (!aBody) {
|
|
if (aListener->mTypeAtom == nsGkAtoms::onSVGLoad) {
|
|
attrName = nsGkAtoms::onload;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onSVGUnload) {
|
|
attrName = nsGkAtoms::onunload;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onSVGResize) {
|
|
attrName = nsGkAtoms::onresize;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onSVGScroll) {
|
|
attrName = nsGkAtoms::onscroll;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onSVGZoom) {
|
|
attrName = nsGkAtoms::onzoom;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onbeginEvent) {
|
|
attrName = nsGkAtoms::onbegin;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onrepeatEvent) {
|
|
attrName = nsGkAtoms::onrepeat;
|
|
} else if (aListener->mTypeAtom == nsGkAtoms::onendEvent) {
|
|
attrName = nsGkAtoms::onend;
|
|
}
|
|
|
|
element->GetAttr(kNameSpaceID_None, attrName, handlerBody);
|
|
body = &handlerBody;
|
|
aElement = element;
|
|
}
|
|
aListener = nullptr;
|
|
|
|
nsAutoCString url(NS_LITERAL_CSTRING("-moz-evil:lying-event-listener"));
|
|
MOZ_ASSERT(body);
|
|
MOZ_ASSERT(aElement);
|
|
nsIURI* uri = aElement->OwnerDoc()->GetDocumentURI();
|
|
if (uri) {
|
|
uri->GetSpec(url);
|
|
}
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(mTarget);
|
|
uint32_t argCount;
|
|
const char** argNames;
|
|
nsContentUtils::GetEventArgNames(aElement->GetNameSpaceID(), typeAtom, win,
|
|
&argCount, &argNames);
|
|
|
|
// Wrap the event target, so that we can use it as the scope for the event
|
|
// handler. Note that mTarget is different from aElement in the <body> case,
|
|
// where mTarget is a Window.
|
|
//
|
|
// The wrapScope doesn't really matter here, because the target will create
|
|
// its reflector in the proper scope, and then we'll enter that realm.
|
|
JS::Rooted<JSObject*> wrapScope(cx, global->GetGlobalJSObject());
|
|
JS::Rooted<JS::Value> v(cx);
|
|
{
|
|
JSAutoRealm ar(cx, wrapScope);
|
|
nsresult rv = nsContentUtils::WrapNative(cx, mTarget, &v,
|
|
/* aAllowWrapping = */ false);
|
|
if (NS_WARN_IF(NS_FAILED(rv))) {
|
|
return rv;
|
|
}
|
|
}
|
|
|
|
JS::Rooted<JSObject*> target(cx, &v.toObject());
|
|
JSAutoRealm ar(cx, target);
|
|
|
|
// Now that we've entered the realm we actually care about, create our
|
|
// scope chain. Note that we start with |element|, not aElement, because
|
|
// mTarget is different from aElement in the <body> case, where mTarget is a
|
|
// Window, and in that case we do not want the scope chain to include the body
|
|
// or the document.
|
|
JS::AutoObjectVector scopeChain(cx);
|
|
if (!nsJSUtils::GetScopeChainForElement(cx, element, scopeChain)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
nsDependentAtomString str(attrName);
|
|
// Most of our names are short enough that we don't even have to malloc
|
|
// the JS string stuff, so don't worry about playing games with
|
|
// refcounting XPCOM stringbuffers.
|
|
JS::Rooted<JSString*> jsStr(
|
|
cx, JS_NewUCStringCopyN(cx, str.BeginReading(), str.Length()));
|
|
NS_ENSURE_TRUE(jsStr, NS_ERROR_OUT_OF_MEMORY);
|
|
|
|
// Get the reflector for |aElement|, so that we can pass to setElement.
|
|
if (NS_WARN_IF(!GetOrCreateDOMReflector(cx, aElement, &v))) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
JS::CompileOptions options(cx);
|
|
// Use line 0 to make the function body starts from line 1.
|
|
options.setIntroductionType("eventHandler")
|
|
.setFileAndLine(url.get(), 0)
|
|
.setElement(&v.toObject())
|
|
.setElementAttributeName(jsStr);
|
|
|
|
JS::Rooted<JSObject*> handler(cx);
|
|
result = nsJSUtils::CompileFunction(jsapi, scopeChain, options,
|
|
nsAtomCString(typeAtom), argCount,
|
|
argNames, *body, handler.address());
|
|
NS_ENSURE_SUCCESS(result, result);
|
|
NS_ENSURE_TRUE(handler, NS_ERROR_FAILURE);
|
|
|
|
MOZ_ASSERT(js::IsObjectInContextCompartment(handler, cx));
|
|
JS::Rooted<JSObject*> handlerGlobal(cx, JS::CurrentGlobalOrNull(cx));
|
|
|
|
if (jsEventHandler->EventName() == nsGkAtoms::onerror && win) {
|
|
RefPtr<OnErrorEventHandlerNonNull> handlerCallback =
|
|
new OnErrorEventHandlerNonNull(static_cast<JSContext*>(nullptr),
|
|
handler, handlerGlobal,
|
|
/* aIncumbentGlobal = */ nullptr);
|
|
jsEventHandler->SetHandler(handlerCallback);
|
|
} else if (jsEventHandler->EventName() == nsGkAtoms::onbeforeunload && win) {
|
|
RefPtr<OnBeforeUnloadEventHandlerNonNull> handlerCallback =
|
|
new OnBeforeUnloadEventHandlerNonNull(static_cast<JSContext*>(nullptr),
|
|
handler, handlerGlobal,
|
|
/* aIncumbentGlobal = */ nullptr);
|
|
jsEventHandler->SetHandler(handlerCallback);
|
|
} else {
|
|
RefPtr<EventHandlerNonNull> handlerCallback = new EventHandlerNonNull(
|
|
static_cast<JSContext*>(nullptr), handler, handlerGlobal,
|
|
/* aIncumbentGlobal = */ nullptr);
|
|
jsEventHandler->SetHandler(handlerCallback);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsresult EventListenerManager::HandleEventSubType(Listener* aListener,
|
|
Event* aDOMEvent,
|
|
EventTarget* aCurrentTarget) {
|
|
nsresult result = NS_OK;
|
|
// strong ref
|
|
EventListenerHolder listenerHolder(aListener->mListener.Clone());
|
|
|
|
// If this is a script handler and we haven't yet
|
|
// compiled the event handler itself
|
|
if ((aListener->mListenerType == Listener::eJSEventListener) &&
|
|
aListener->mHandlerIsString) {
|
|
result = CompileEventHandlerInternal(aListener, nullptr, nullptr);
|
|
aListener = nullptr;
|
|
}
|
|
|
|
if (NS_SUCCEEDED(result)) {
|
|
nsAutoMicroTask mt;
|
|
|
|
// Event::currentTarget is set in EventDispatcher.
|
|
if (listenerHolder.HasWebIDLCallback()) {
|
|
ErrorResult rv;
|
|
listenerHolder.GetWebIDLCallback()->HandleEvent(aCurrentTarget,
|
|
*aDOMEvent, rv);
|
|
result = rv.StealNSResult();
|
|
} else {
|
|
result = listenerHolder.GetXPCOMCallback()->HandleEvent(aDOMEvent);
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
EventMessage EventListenerManager::GetLegacyEventMessage(
|
|
EventMessage aEventMessage) const {
|
|
// (If we're off-main-thread, we can't check the pref; so we just behave as
|
|
// if it's disabled.)
|
|
if (mIsMainThreadELM) {
|
|
if (IsWebkitPrefixSupportEnabled()) {
|
|
// webkit-prefixed legacy events:
|
|
if (aEventMessage == eTransitionEnd) {
|
|
return eWebkitTransitionEnd;
|
|
}
|
|
if (aEventMessage == eAnimationStart) {
|
|
return eWebkitAnimationStart;
|
|
}
|
|
if (aEventMessage == eAnimationEnd) {
|
|
return eWebkitAnimationEnd;
|
|
}
|
|
if (aEventMessage == eAnimationIteration) {
|
|
return eWebkitAnimationIteration;
|
|
}
|
|
}
|
|
}
|
|
|
|
switch (aEventMessage) {
|
|
case eFullscreenChange:
|
|
return eMozFullscreenChange;
|
|
case eFullscreenError:
|
|
return eMozFullscreenError;
|
|
default:
|
|
return aEventMessage;
|
|
}
|
|
}
|
|
|
|
EventMessage EventListenerManager::GetEventMessage(nsAtom* aEventName) const {
|
|
if (mIsMainThreadELM) {
|
|
return nsContentUtils::GetEventMessage(aEventName);
|
|
}
|
|
|
|
// The nsContentUtils event message hashtables aren't threadsafe, so just fall
|
|
// back to eUnidentifiedEvent.
|
|
return eUnidentifiedEvent;
|
|
}
|
|
|
|
EventMessage EventListenerManager::GetEventMessageAndAtomForListener(
|
|
const nsAString& aType, nsAtom** aAtom) {
|
|
if (mIsMainThreadELM) {
|
|
return nsContentUtils::GetEventMessageAndAtomForListener(aType, aAtom);
|
|
}
|
|
|
|
*aAtom = NS_Atomize(NS_LITERAL_STRING("on") + aType).take();
|
|
return eUnidentifiedEvent;
|
|
}
|
|
|
|
already_AddRefed<nsPIDOMWindowInner> EventListenerManager::WindowFromListener(
|
|
Listener* aListener, bool aItemInShadowTree) {
|
|
nsCOMPtr<nsPIDOMWindowInner> innerWindow;
|
|
if (!aItemInShadowTree) {
|
|
if (aListener->mListener.HasWebIDLCallback()) {
|
|
CallbackObject* callback = aListener->mListener.GetWebIDLCallback();
|
|
nsIGlobalObject* global = nullptr;
|
|
if (callback) {
|
|
global = callback->IncumbentGlobalOrNull();
|
|
}
|
|
if (global) {
|
|
innerWindow = global->AsInnerWindow(); // Can be nullptr
|
|
}
|
|
} else {
|
|
// Can't get the global from
|
|
// listener->mListener.GetXPCOMCallback().
|
|
// In most cases, it would be the same as for
|
|
// the target, so let's do that.
|
|
innerWindow = GetInnerWindowForTarget(); // Can be nullptr
|
|
}
|
|
}
|
|
return innerWindow.forget();
|
|
}
|
|
|
|
/**
|
|
* Causes a check for event listeners and processing by them if they exist.
|
|
* @param an event listener
|
|
*/
|
|
|
|
void EventListenerManager::HandleEventInternal(nsPresContext* aPresContext,
|
|
WidgetEvent* aEvent,
|
|
Event** aDOMEvent,
|
|
EventTarget* aCurrentTarget,
|
|
nsEventStatus* aEventStatus,
|
|
bool aItemInShadowTree) {
|
|
// Set the value of the internal PreventDefault flag properly based on
|
|
// aEventStatus
|
|
if (!aEvent->DefaultPrevented() &&
|
|
*aEventStatus == nsEventStatus_eConsumeNoDefault) {
|
|
// Assume that if only aEventStatus claims that the event has already been
|
|
// consumed, the consumer is default event handler.
|
|
aEvent->PreventDefault();
|
|
}
|
|
|
|
Maybe<nsAutoPopupStatePusher> popupStatePusher;
|
|
if (mIsMainThreadELM) {
|
|
popupStatePusher.emplace(
|
|
PopupBlocker::GetEventPopupControlState(aEvent, *aDOMEvent));
|
|
}
|
|
|
|
bool hasListener = false;
|
|
bool hasListenerForCurrentGroup = false;
|
|
bool usingLegacyMessage = false;
|
|
bool hasRemovedListener = false;
|
|
EventMessage eventMessage = aEvent->mMessage;
|
|
|
|
while (true) {
|
|
nsAutoTObserverArray<Listener, 2>::EndLimitedIterator iter(mListeners);
|
|
Maybe<EventMessageAutoOverride> legacyAutoOverride;
|
|
while (iter.HasMore()) {
|
|
if (aEvent->mFlags.mImmediatePropagationStopped) {
|
|
break;
|
|
}
|
|
Listener* listener = &iter.GetNext();
|
|
// Check that the phase is same in event and event listener.
|
|
// Handle only trusted events, except when listener permits untrusted
|
|
// events.
|
|
if (ListenerCanHandle(listener, aEvent, eventMessage)) {
|
|
hasListener = true;
|
|
hasListenerForCurrentGroup =
|
|
hasListenerForCurrentGroup ||
|
|
listener->mFlags.mInSystemGroup == aEvent->mFlags.mInSystemGroup;
|
|
if (listener->IsListening(aEvent) &&
|
|
(aEvent->IsTrusted() || listener->mFlags.mAllowUntrustedEvents)) {
|
|
if (!*aDOMEvent) {
|
|
// This is tiny bit slow, but happens only once per event.
|
|
// Similar code also in EventDispatcher.
|
|
nsCOMPtr<EventTarget> et = aEvent->mOriginalTarget;
|
|
RefPtr<Event> event = EventDispatcher::CreateEvent(
|
|
et, aPresContext, aEvent, EmptyString());
|
|
event.forget(aDOMEvent);
|
|
}
|
|
if (*aDOMEvent) {
|
|
if (!aEvent->mCurrentTarget) {
|
|
aEvent->mCurrentTarget = aCurrentTarget->GetTargetForDOMEvent();
|
|
if (!aEvent->mCurrentTarget) {
|
|
break;
|
|
}
|
|
}
|
|
if (usingLegacyMessage && !legacyAutoOverride) {
|
|
// Override the aDOMEvent's event-message (its .type) until we
|
|
// finish traversing listeners (when legacyAutoOverride destructs)
|
|
legacyAutoOverride.emplace(*aDOMEvent, eventMessage);
|
|
}
|
|
|
|
// Maybe add a marker to the docshell's timeline, but only
|
|
// bother with all the logic if some docshell is recording.
|
|
nsCOMPtr<nsIDocShell> docShell;
|
|
RefPtr<TimelineConsumers> timelines = TimelineConsumers::Get();
|
|
bool needsEndEventMarker = false;
|
|
|
|
if (mIsMainThreadELM &&
|
|
listener->mListenerType != Listener::eNativeListener) {
|
|
docShell = nsContentUtils::GetDocShellForEventTarget(mTarget);
|
|
if (docShell) {
|
|
if (timelines && timelines->HasConsumer(docShell)) {
|
|
needsEndEventMarker = true;
|
|
nsAutoString typeStr;
|
|
(*aDOMEvent)->GetType(typeStr);
|
|
uint16_t phase = (*aDOMEvent)->EventPhase();
|
|
timelines->AddMarkerForDocShell(
|
|
docShell, MakeUnique<EventTimelineMarker>(
|
|
typeStr, phase, MarkerTracingType::START));
|
|
}
|
|
}
|
|
}
|
|
|
|
aEvent->mFlags.mInPassiveListener = listener->mFlags.mPassive;
|
|
Maybe<Listener> listenerHolder;
|
|
if (listener->mFlags.mOnce) {
|
|
// Move the listener to the stack before handling the event.
|
|
// The order is important, otherwise the listener could be
|
|
// called again inside the listener.
|
|
listenerHolder.emplace(std::move(*listener));
|
|
listener = listenerHolder.ptr();
|
|
hasRemovedListener = true;
|
|
}
|
|
|
|
nsCOMPtr<nsPIDOMWindowInner> innerWindow =
|
|
WindowFromListener(listener, aItemInShadowTree);
|
|
mozilla::dom::Event* oldWindowEvent = nullptr;
|
|
if (innerWindow) {
|
|
oldWindowEvent = innerWindow->SetEvent(*aDOMEvent);
|
|
}
|
|
|
|
nsresult rv =
|
|
HandleEventSubType(listener, *aDOMEvent, aCurrentTarget);
|
|
|
|
if (innerWindow) {
|
|
Unused << innerWindow->SetEvent(oldWindowEvent);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
aEvent->mFlags.mExceptionWasRaised = true;
|
|
}
|
|
aEvent->mFlags.mInPassiveListener = false;
|
|
|
|
if (needsEndEventMarker) {
|
|
timelines->AddMarkerForDocShell(docShell, "DOMEvent",
|
|
MarkerTracingType::END);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// If we didn't find any matching listeners, and our event has a legacy
|
|
// version, we'll now switch to looking for that legacy version and we'll
|
|
// recheck our listeners.
|
|
if (hasListenerForCurrentGroup || usingLegacyMessage ||
|
|
!aEvent->IsTrusted()) {
|
|
// No need to recheck listeners, because we already found a match, we
|
|
// already rechecked them, or it is not a trusted event.
|
|
break;
|
|
}
|
|
EventMessage legacyEventMessage = GetLegacyEventMessage(eventMessage);
|
|
if (legacyEventMessage == eventMessage) {
|
|
break; // There's no legacy version of our event; no need to recheck.
|
|
}
|
|
MOZ_ASSERT(
|
|
GetLegacyEventMessage(legacyEventMessage) == legacyEventMessage,
|
|
"Legacy event messages should not themselves have legacy versions");
|
|
|
|
// Recheck our listeners, using the legacy event message we just looked up:
|
|
eventMessage = legacyEventMessage;
|
|
usingLegacyMessage = true;
|
|
}
|
|
|
|
aEvent->mCurrentTarget = nullptr;
|
|
|
|
if (hasRemovedListener) {
|
|
// If there are any once listeners replaced with a placeholder in
|
|
// the loop above, we need to clean up them here. Note that, this
|
|
// could clear once listeners handled in some outer level as well,
|
|
// but that should not affect the result.
|
|
mListeners.RemoveElementsBy([](const Listener& aListener) {
|
|
return aListener.mListenerType == Listener::eNoListener;
|
|
});
|
|
NotifyEventListenerRemoved(aEvent->mSpecifiedEventType);
|
|
if (IsDeviceType(aEvent->mMessage)) {
|
|
// This is a device-type event, we need to check whether we can
|
|
// disable device after removing the once listeners.
|
|
bool hasAnyListener = false;
|
|
nsAutoTObserverArray<Listener, 2>::ForwardIterator iter(mListeners);
|
|
while (iter.HasMore()) {
|
|
Listener* listener = &iter.GetNext();
|
|
if (EVENT_TYPE_EQUALS(listener, aEvent->mMessage,
|
|
aEvent->mSpecifiedEventType,
|
|
/* all events */ false)) {
|
|
hasAnyListener = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!hasAnyListener) {
|
|
DisableDevice(aEvent->mMessage);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mIsMainThreadELM && !hasListener) {
|
|
mNoListenerForEvent = aEvent->mMessage;
|
|
mNoListenerForEventAtom = aEvent->mSpecifiedEventType;
|
|
}
|
|
|
|
if (aEvent->DefaultPrevented()) {
|
|
*aEventStatus = nsEventStatus_eConsumeNoDefault;
|
|
}
|
|
}
|
|
|
|
void EventListenerManager::Disconnect() {
|
|
mTarget = nullptr;
|
|
RemoveAllListeners();
|
|
}
|
|
|
|
void EventListenerManager::AddEventListener(const nsAString& aType,
|
|
EventListenerHolder aListenerHolder,
|
|
bool aUseCapture,
|
|
bool aWantsUntrusted) {
|
|
EventListenerFlags flags;
|
|
flags.mCapture = aUseCapture;
|
|
flags.mAllowUntrustedEvents = aWantsUntrusted;
|
|
return AddEventListenerByType(std::move(aListenerHolder), aType, flags);
|
|
}
|
|
|
|
void EventListenerManager::AddEventListener(
|
|
const nsAString& aType, EventListenerHolder aListenerHolder,
|
|
const dom::AddEventListenerOptionsOrBoolean& aOptions,
|
|
bool aWantsUntrusted) {
|
|
EventListenerFlags flags;
|
|
Optional<bool> passive;
|
|
if (aOptions.IsBoolean()) {
|
|
flags.mCapture = aOptions.GetAsBoolean();
|
|
} else {
|
|
const auto& options = aOptions.GetAsAddEventListenerOptions();
|
|
flags.mCapture = options.mCapture;
|
|
flags.mInSystemGroup = options.mMozSystemGroup;
|
|
flags.mOnce = options.mOnce;
|
|
if (options.mPassive.WasPassed()) {
|
|
passive.Construct(options.mPassive.Value());
|
|
}
|
|
}
|
|
flags.mAllowUntrustedEvents = aWantsUntrusted;
|
|
return AddEventListenerByType(std::move(aListenerHolder), aType, flags,
|
|
passive);
|
|
}
|
|
|
|
void EventListenerManager::RemoveEventListener(
|
|
const nsAString& aType, EventListenerHolder aListenerHolder,
|
|
bool aUseCapture) {
|
|
EventListenerFlags flags;
|
|
flags.mCapture = aUseCapture;
|
|
RemoveEventListenerByType(std::move(aListenerHolder), aType, flags);
|
|
}
|
|
|
|
void EventListenerManager::RemoveEventListener(
|
|
const nsAString& aType, EventListenerHolder aListenerHolder,
|
|
const dom::EventListenerOptionsOrBoolean& aOptions) {
|
|
EventListenerFlags flags;
|
|
if (aOptions.IsBoolean()) {
|
|
flags.mCapture = aOptions.GetAsBoolean();
|
|
} else {
|
|
const auto& options = aOptions.GetAsEventListenerOptions();
|
|
flags.mCapture = options.mCapture;
|
|
flags.mInSystemGroup = options.mMozSystemGroup;
|
|
}
|
|
RemoveEventListenerByType(std::move(aListenerHolder), aType, flags);
|
|
}
|
|
|
|
void EventListenerManager::AddListenerForAllEvents(EventListener* aDOMListener,
|
|
bool aUseCapture,
|
|
bool aWantsUntrusted,
|
|
bool aSystemEventGroup) {
|
|
EventListenerFlags flags;
|
|
flags.mCapture = aUseCapture;
|
|
flags.mAllowUntrustedEvents = aWantsUntrusted;
|
|
flags.mInSystemGroup = aSystemEventGroup;
|
|
AddEventListenerInternal(EventListenerHolder(aDOMListener), eAllEvents,
|
|
nullptr, flags, false, true);
|
|
}
|
|
|
|
void EventListenerManager::RemoveListenerForAllEvents(
|
|
EventListener* aDOMListener, bool aUseCapture, bool aSystemEventGroup) {
|
|
EventListenerFlags flags;
|
|
flags.mCapture = aUseCapture;
|
|
flags.mInSystemGroup = aSystemEventGroup;
|
|
RemoveEventListenerInternal(EventListenerHolder(aDOMListener), eAllEvents,
|
|
nullptr, flags, true);
|
|
}
|
|
|
|
bool EventListenerManager::HasMutationListeners() {
|
|
if (mMayHaveMutationListeners) {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (listener->mEventMessage >= eLegacyMutationEventFirst &&
|
|
listener->mEventMessage <= eLegacyMutationEventLast) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
uint32_t EventListenerManager::MutationListenerBits() {
|
|
uint32_t bits = 0;
|
|
if (mMayHaveMutationListeners) {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (listener->mEventMessage >= eLegacyMutationEventFirst &&
|
|
listener->mEventMessage <= eLegacyMutationEventLast) {
|
|
if (listener->mEventMessage == eLegacySubtreeModified) {
|
|
return kAllMutationBits;
|
|
}
|
|
bits |= MutationBitForEventType(listener->mEventMessage);
|
|
}
|
|
}
|
|
}
|
|
return bits;
|
|
}
|
|
|
|
bool EventListenerManager::HasListenersFor(const nsAString& aEventName) const {
|
|
RefPtr<nsAtom> atom = NS_Atomize(NS_LITERAL_STRING("on") + aEventName);
|
|
return HasListenersFor(atom);
|
|
}
|
|
|
|
bool EventListenerManager::HasListenersFor(nsAtom* aEventNameWithOn) const {
|
|
#ifdef DEBUG
|
|
nsAutoString name;
|
|
aEventNameWithOn->ToString(name);
|
|
#endif
|
|
NS_ASSERTION(StringBeginsWith(name, NS_LITERAL_STRING("on")),
|
|
"Event name does not start with 'on'");
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
const Listener* listener = &mListeners.ElementAt(i);
|
|
if (listener->mTypeAtom == aEventNameWithOn) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool EventListenerManager::HasListeners() const {
|
|
return !mListeners.IsEmpty();
|
|
}
|
|
|
|
nsresult EventListenerManager::GetListenerInfo(
|
|
nsCOMArray<nsIEventListenerInfo>* aList) {
|
|
nsCOMPtr<EventTarget> target = mTarget;
|
|
NS_ENSURE_STATE(target);
|
|
aList->Clear();
|
|
nsAutoTObserverArray<Listener, 2>::ForwardIterator iter(mListeners);
|
|
while (iter.HasMore()) {
|
|
const Listener& listener = iter.GetNext();
|
|
// If this is a script handler and we haven't yet
|
|
// compiled the event handler itself go ahead and compile it
|
|
if (listener.mListenerType == Listener::eJSEventListener &&
|
|
listener.mHandlerIsString) {
|
|
CompileEventHandlerInternal(const_cast<Listener*>(&listener), nullptr,
|
|
nullptr);
|
|
}
|
|
nsAutoString eventType;
|
|
if (listener.mAllEvents) {
|
|
eventType.SetIsVoid(true);
|
|
} else if (listener.mListenerType == Listener::eNoListener) {
|
|
continue;
|
|
} else {
|
|
eventType.Assign(Substring(nsDependentAtomString(listener.mTypeAtom), 2));
|
|
}
|
|
|
|
JS::Rooted<JSObject*> callback(RootingCx());
|
|
JS::Rooted<JSObject*> callbackGlobal(RootingCx());
|
|
if (JSEventHandler* handler = listener.GetJSEventHandler()) {
|
|
if (handler->GetTypedEventHandler().HasEventHandler()) {
|
|
CallbackFunction* callbackFun = handler->GetTypedEventHandler().Ptr();
|
|
callback = callbackFun->CallableOrNull();
|
|
callbackGlobal = callbackFun->CallbackGlobalOrNull();
|
|
if (!callback) {
|
|
// This will be null for cross-compartment event listeners
|
|
// which have been destroyed.
|
|
continue;
|
|
}
|
|
}
|
|
} else if (listener.mListenerType == Listener::eWebIDLListener) {
|
|
EventListener* listenerCallback = listener.mListener.GetWebIDLCallback();
|
|
callback = listenerCallback->CallbackOrNull();
|
|
callbackGlobal = listenerCallback->CallbackGlobalOrNull();
|
|
if (!callback) {
|
|
// This will be null for cross-compartment event listeners
|
|
// which have been destroyed.
|
|
continue;
|
|
}
|
|
}
|
|
|
|
RefPtr<EventListenerInfo> info = new EventListenerInfo(
|
|
eventType, callback, callbackGlobal, listener.mFlags.mCapture,
|
|
listener.mFlags.mAllowUntrustedEvents, listener.mFlags.mInSystemGroup);
|
|
aList->AppendElement(info.forget());
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
bool EventListenerManager::HasUnloadListeners() {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (listener->mEventMessage == eUnload ||
|
|
listener->mEventMessage == eBeforeUnload) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void EventListenerManager::SetEventHandler(nsAtom* aEventName,
|
|
EventHandlerNonNull* aHandler) {
|
|
if (!aHandler) {
|
|
RemoveEventHandler(aEventName);
|
|
return;
|
|
}
|
|
|
|
// Untrusted events are always permitted for non-chrome script
|
|
// handlers.
|
|
SetEventHandlerInternal(
|
|
aEventName, TypedEventHandler(aHandler),
|
|
!mIsMainThreadELM || !nsContentUtils::IsCallerChrome());
|
|
}
|
|
|
|
void EventListenerManager::SetEventHandler(
|
|
OnErrorEventHandlerNonNull* aHandler) {
|
|
if (!aHandler) {
|
|
RemoveEventHandler(nsGkAtoms::onerror);
|
|
return;
|
|
}
|
|
|
|
// Untrusted events are always permitted on workers and for non-chrome script
|
|
// on the main thread.
|
|
bool allowUntrusted = !mIsMainThreadELM || !nsContentUtils::IsCallerChrome();
|
|
|
|
SetEventHandlerInternal(nsGkAtoms::onerror, TypedEventHandler(aHandler),
|
|
allowUntrusted);
|
|
}
|
|
|
|
void EventListenerManager::SetEventHandler(
|
|
OnBeforeUnloadEventHandlerNonNull* aHandler) {
|
|
if (!aHandler) {
|
|
RemoveEventHandler(nsGkAtoms::onbeforeunload);
|
|
return;
|
|
}
|
|
|
|
// Untrusted events are always permitted for non-chrome script
|
|
// handlers.
|
|
SetEventHandlerInternal(
|
|
nsGkAtoms::onbeforeunload, TypedEventHandler(aHandler),
|
|
!mIsMainThreadELM || !nsContentUtils::IsCallerChrome());
|
|
}
|
|
|
|
const TypedEventHandler* EventListenerManager::GetTypedEventHandler(
|
|
nsAtom* aEventName) {
|
|
EventMessage eventMessage = GetEventMessage(aEventName);
|
|
Listener* listener = FindEventHandler(eventMessage, aEventName);
|
|
|
|
if (!listener) {
|
|
return nullptr;
|
|
}
|
|
|
|
JSEventHandler* jsEventHandler = listener->GetJSEventHandler();
|
|
|
|
if (listener->mHandlerIsString) {
|
|
CompileEventHandlerInternal(listener, nullptr, nullptr);
|
|
}
|
|
|
|
const TypedEventHandler& typedHandler =
|
|
jsEventHandler->GetTypedEventHandler();
|
|
return typedHandler.HasEventHandler() ? &typedHandler : nullptr;
|
|
}
|
|
|
|
size_t EventListenerManager::SizeOfIncludingThis(
|
|
MallocSizeOf aMallocSizeOf) const {
|
|
size_t n = aMallocSizeOf(this);
|
|
n += mListeners.ShallowSizeOfExcludingThis(aMallocSizeOf);
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
JSEventHandler* jsEventHandler =
|
|
mListeners.ElementAt(i).GetJSEventHandler();
|
|
if (jsEventHandler) {
|
|
n += jsEventHandler->SizeOfIncludingThis(aMallocSizeOf);
|
|
}
|
|
}
|
|
return n;
|
|
}
|
|
|
|
void EventListenerManager::MarkForCC() {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
const Listener& listener = mListeners.ElementAt(i);
|
|
JSEventHandler* jsEventHandler = listener.GetJSEventHandler();
|
|
if (jsEventHandler) {
|
|
const TypedEventHandler& typedHandler =
|
|
jsEventHandler->GetTypedEventHandler();
|
|
if (typedHandler.HasEventHandler()) {
|
|
typedHandler.Ptr()->MarkForCC();
|
|
}
|
|
} else if (listener.mListenerType == Listener::eWebIDLListener) {
|
|
listener.mListener.GetWebIDLCallback()->MarkForCC();
|
|
}
|
|
}
|
|
if (mRefCnt.IsPurple()) {
|
|
mRefCnt.RemovePurple();
|
|
}
|
|
}
|
|
|
|
void EventListenerManager::TraceListeners(JSTracer* aTrc) {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
const Listener& listener = mListeners.ElementAt(i);
|
|
JSEventHandler* jsEventHandler = listener.GetJSEventHandler();
|
|
if (jsEventHandler) {
|
|
const TypedEventHandler& typedHandler =
|
|
jsEventHandler->GetTypedEventHandler();
|
|
if (typedHandler.HasEventHandler()) {
|
|
mozilla::TraceScriptHolder(typedHandler.Ptr(), aTrc);
|
|
}
|
|
} else if (listener.mListenerType == Listener::eWebIDLListener) {
|
|
mozilla::TraceScriptHolder(listener.mListener.GetWebIDLCallback(), aTrc);
|
|
}
|
|
// We might have eWrappedJSListener, but that is the legacy type for
|
|
// JS implemented event listeners, and trickier to handle here.
|
|
}
|
|
}
|
|
|
|
bool EventListenerManager::HasNonSystemGroupListenersForUntrustedKeyEvents() {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (!listener->mFlags.mInSystemGroup &&
|
|
listener->mFlags.mAllowUntrustedEvents &&
|
|
(listener->mTypeAtom == nsGkAtoms::onkeydown ||
|
|
listener->mTypeAtom == nsGkAtoms::onkeypress ||
|
|
listener->mTypeAtom == nsGkAtoms::onkeyup)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool EventListenerManager::
|
|
HasNonPassiveNonSystemGroupListenersForUntrustedKeyEvents() {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (!listener->mFlags.mPassive && !listener->mFlags.mInSystemGroup &&
|
|
listener->mFlags.mAllowUntrustedEvents &&
|
|
(listener->mTypeAtom == nsGkAtoms::onkeydown ||
|
|
listener->mTypeAtom == nsGkAtoms::onkeypress ||
|
|
listener->mTypeAtom == nsGkAtoms::onkeyup)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool EventListenerManager::HasApzAwareListeners() {
|
|
uint32_t count = mListeners.Length();
|
|
for (uint32_t i = 0; i < count; ++i) {
|
|
Listener* listener = &mListeners.ElementAt(i);
|
|
if (IsApzAwareListener(listener)) {
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool EventListenerManager::IsApzAwareListener(Listener* aListener) {
|
|
return !aListener->mFlags.mPassive && IsApzAwareEvent(aListener->mTypeAtom);
|
|
}
|
|
|
|
bool EventListenerManager::IsApzAwareEvent(nsAtom* aEvent) {
|
|
if (aEvent == nsGkAtoms::onwheel || aEvent == nsGkAtoms::onDOMMouseScroll ||
|
|
aEvent == nsGkAtoms::onmousewheel ||
|
|
aEvent == nsGkAtoms::onMozMousePixelScroll) {
|
|
return true;
|
|
}
|
|
// In theory we should schedule a repaint if the touch event pref changes,
|
|
// because the event regions might be out of date. In practice that seems like
|
|
// overkill because users generally shouldn't be flipping this pref, much
|
|
// less expecting touch listeners on the page to immediately start preventing
|
|
// scrolling without so much as a repaint. Tests that we write can work
|
|
// around this constraint easily enough.
|
|
if (aEvent == nsGkAtoms::ontouchstart || aEvent == nsGkAtoms::ontouchmove) {
|
|
return TouchEvent::PrefEnabled(
|
|
nsContentUtils::GetDocShellForEventTarget(mTarget));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
already_AddRefed<nsIScriptGlobalObject>
|
|
EventListenerManager::GetScriptGlobalAndDocument(Document** aDoc) {
|
|
nsCOMPtr<nsINode> node(do_QueryInterface(mTarget));
|
|
nsCOMPtr<Document> doc;
|
|
nsCOMPtr<nsIScriptGlobalObject> global;
|
|
if (node) {
|
|
// Try to get context from doc
|
|
// XXX sXBL/XBL2 issue -- do we really want the owner here? What
|
|
// if that's the XBL document?
|
|
doc = node->OwnerDoc();
|
|
if (doc->IsLoadedAsData()) {
|
|
return nullptr;
|
|
}
|
|
|
|
// We want to allow compiling an event handler even in an unloaded
|
|
// document, so use GetScopeObject here, not GetScriptHandlingObject.
|
|
global = do_QueryInterface(doc->GetScopeObject());
|
|
} else {
|
|
if (nsCOMPtr<nsPIDOMWindowInner> win = GetTargetAsInnerWindow()) {
|
|
doc = win->GetExtantDoc();
|
|
global = do_QueryInterface(win);
|
|
} else {
|
|
global = do_QueryInterface(mTarget);
|
|
}
|
|
}
|
|
|
|
doc.forget(aDoc);
|
|
return global.forget();
|
|
}
|
|
|
|
} // namespace mozilla
|