133 lines
4.6 KiB
C++
133 lines
4.6 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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#ifndef NS_SMILTIMEVALUESPEC_H_
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#define NS_SMILTIMEVALUESPEC_H_
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#include "mozilla/Attributes.h"
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#include "nsSMILTimeValueSpecParams.h"
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#include "nsReferencedElement.h"
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#include "nsAutoPtr.h"
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#include "nsIDOMEventListener.h"
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class nsAString;
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class nsSMILTimeValue;
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class nsSMILTimedElement;
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class nsSMILTimeContainer;
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class nsSMILInstanceTime;
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class nsSMILInterval;
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namespace mozilla {
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class EventListenerManager;
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} // namespace mozilla
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//----------------------------------------------------------------------
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// nsSMILTimeValueSpec class
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//
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// An individual element of a 'begin' or 'end' attribute, e.g. '5s', 'a.end'.
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// This class handles the parsing of such specifications and performs the
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// necessary event handling (for event, repeat, and accesskey specifications)
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// and synchronisation (for syncbase specifications).
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//
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// For an overview of how this class is related to other SMIL time classes see
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// the documentation in nsSMILTimeValue.h
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class nsSMILTimeValueSpec
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{
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public:
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typedef mozilla::dom::Element Element;
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nsSMILTimeValueSpec(nsSMILTimedElement& aOwner, bool aIsBegin);
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~nsSMILTimeValueSpec();
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nsresult SetSpec(const nsAString& aStringSpec, Element* aContextNode);
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void ResolveReferences(nsIContent* aContextNode);
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bool IsEventBased() const;
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void HandleNewInterval(nsSMILInterval& aInterval,
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const nsSMILTimeContainer* aSrcContainer);
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void HandleTargetElementChange(Element* aNewTarget);
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// For created nsSMILInstanceTime objects
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bool DependsOnBegin() const;
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void HandleChangedInstanceTime(const nsSMILInstanceTime& aBaseTime,
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const nsSMILTimeContainer* aSrcContainer,
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nsSMILInstanceTime& aInstanceTimeToUpdate,
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bool aObjectChanged);
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void HandleDeletedInstanceTime(nsSMILInstanceTime& aInstanceTime);
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// Cycle-collection support
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void Traverse(nsCycleCollectionTraversalCallback* aCallback);
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void Unlink();
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protected:
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void UpdateReferencedElement(Element* aFrom, Element* aTo);
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void UnregisterFromReferencedElement(Element* aElement);
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nsSMILTimedElement* GetTimedElement(Element* aElement);
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bool IsWhitelistedEvent();
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void RegisterEventListener(Element* aElement);
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void UnregisterEventListener(Element* aElement);
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mozilla::EventListenerManager* GetEventListenerManager(Element* aElement);
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void HandleEvent(nsIDOMEvent* aEvent);
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bool CheckEventDetail(nsIDOMEvent* aEvent);
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bool CheckRepeatEventDetail(nsIDOMEvent* aEvent);
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bool CheckAccessKeyEventDetail(nsIDOMEvent* aEvent);
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nsSMILTimeValue ConvertBetweenTimeContainers(const nsSMILTimeValue& aSrcTime,
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const nsSMILTimeContainer* aSrcContainer);
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bool ApplyOffset(nsSMILTimeValue& aTime) const;
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nsSMILTimedElement* mOwner;
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bool mIsBegin; // Indicates if *we* are a begin spec,
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// not to be confused with
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// mParams.mSyncBegin which indicates
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// if we're synced with the begin of
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// the target.
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nsSMILTimeValueSpecParams mParams;
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class TimeReferenceElement : public nsReferencedElement
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{
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public:
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explicit TimeReferenceElement(nsSMILTimeValueSpec* aOwner) : mSpec(aOwner) { }
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void ResetWithElement(Element* aTo) {
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RefPtr<Element> from = get();
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Unlink();
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ElementChanged(from, aTo);
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}
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protected:
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virtual void ElementChanged(Element* aFrom, Element* aTo) override
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{
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nsReferencedElement::ElementChanged(aFrom, aTo);
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mSpec->UpdateReferencedElement(aFrom, aTo);
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}
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virtual bool IsPersistent() override { return true; }
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private:
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nsSMILTimeValueSpec* mSpec;
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};
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TimeReferenceElement mReferencedElement;
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class EventListener final : public nsIDOMEventListener
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{
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~EventListener() {}
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public:
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explicit EventListener(nsSMILTimeValueSpec* aOwner) : mSpec(aOwner) { }
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void Disconnect()
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{
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mSpec = nullptr;
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}
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NS_DECL_ISUPPORTS
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NS_DECL_NSIDOMEVENTLISTENER
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private:
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nsSMILTimeValueSpec* mSpec;
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};
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RefPtr<EventListener> mEventListener;
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};
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#endif // NS_SMILTIMEVALUESPEC_H_
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