зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
3.0 KiB
C++
137 строки
3.0 KiB
C++
/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
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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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_workers_listenermanager_h__
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#define mozilla_dom_workers_listenermanager_h__
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#include "mozilla/dom/workers/Workers.h"
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#include "mozilla/LinkedList.h"
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#include "mozilla/ErrorResult.h"
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BEGIN_WORKERS_NAMESPACE
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class EventTarget;
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// XXX Current impl doesn't divide into phases.
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// XXX Current impl doesn't handle event target chains.
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class EventListenerManager
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{
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public:
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struct ListenerCollection;
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private:
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LinkedList<ListenerCollection> mCollections;
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public:
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EventListenerManager()
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{
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}
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#ifdef DEBUG
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~EventListenerManager();
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#endif
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void
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_trace(JSTracer* aTrc) const
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{
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if (!mCollections.isEmpty()) {
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TraceInternal(aTrc);
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}
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}
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void
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_finalize(JSFreeOp* aFop)
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{
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if (!mCollections.isEmpty()) {
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FinalizeInternal(aFop);
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}
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}
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enum Phase
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{
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All = 0,
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Capturing,
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Onfoo,
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Bubbling
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};
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void
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AddEventListener(JSContext* aCx, const jsid& aType,
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JS::Handle<JSObject*> aListener,
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bool aCapturing, bool aWantsUntrusted, ErrorResult& aRv)
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{
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Add(aCx, aType, aListener, aCapturing ? Capturing : Bubbling,
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aWantsUntrusted, aRv);
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}
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void
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RemoveEventListener(JSContext* aCx, const jsid& aType,
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JS::Handle<JSObject*> aListener, bool aCapturing)
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{
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if (mCollections.isEmpty()) {
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return;
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}
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Remove(aCx, aType, aListener, aCapturing ? Capturing : Bubbling, true);
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}
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bool
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DispatchEvent(JSContext* aCx, const EventTarget& aTarget, JSObject* aEvent,
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ErrorResult& aRv) const;
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JSObject*
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GetEventListener(const jsid& aType) const;
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void
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SetEventListener(JSContext* aCx, const jsid& aType,
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JS::Handle<JSObject*> aListener,
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ErrorResult& aRv)
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{
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JS::Rooted<JSObject*> existing(aCx, GetEventListener(aType));
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if (existing) {
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Remove(aCx, aType, existing, Onfoo, false);
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}
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if (aListener) {
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Add(aCx, aType, aListener, Onfoo, false, aRv);
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}
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}
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bool
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HasListeners() const
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{
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return !mCollections.isEmpty();
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}
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bool
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HasListenersForType(JSContext* aCx, const jsid& aType) const
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{
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return HasListeners() && HasListenersForTypeInternal(aCx, aType);
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}
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private:
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void
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TraceInternal(JSTracer* aTrc) const;
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void
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FinalizeInternal(JSFreeOp* aFop);
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void
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Add(JSContext* aCx, const jsid& aType, JS::Handle<JSObject*> aListener,
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Phase aPhase, bool aWantsUntrusted, ErrorResult& aRv);
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void
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Remove(JSContext* aCx, const jsid& aType, JS::Handle<JSObject*> aListener,
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Phase aPhase, bool aClearEmpty);
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bool
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HasListenersForTypeInternal(JSContext* aCx, const jsid& aType) const;
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};
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END_WORKERS_NAMESPACE
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#endif /* mozilla_dom_workers_listenermanager_h__ */
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