gecko-dev/content/smil/nsSMILTimeValueSpec.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Mozilla SMIL module.
*
* The Initial Developer of the Original Code is Brian Birtles.
* Portions created by the Initial Developer are Copyright (C) 2005
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Birtles <birtles@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef NS_SMILTIMEVALUESPEC_H_
#define NS_SMILTIMEVALUESPEC_H_
#include "nsSMILTimeValueSpecParams.h"
#include "nsReferencedElement.h"
#include "nsAutoPtr.h"
class nsAString;
class nsSMILTimeValue;
class nsSMILTimedElement;
class nsSMILTimeContainer;
class nsSMILInstanceTime;
class nsSMILInterval;
//----------------------------------------------------------------------
// nsSMILTimeValueSpec class
//
// An individual element of a 'begin' or 'end' attribute, e.g. '5s', 'a.end'.
// This class handles the parsing of such specifications and performs the
// necessary event handling (for event, repeat, and accesskey specifications)
// and synchronisation (for syncbase specifications).
//
// For an overview of how this class is related to other SMIL time classes see
// the documentation in nsSMILTimeValue.h
class nsSMILTimeValueSpec
{
public:
nsSMILTimeValueSpec(nsSMILTimedElement& aOwner, PRBool aIsBegin);
~nsSMILTimeValueSpec();
nsresult SetSpec(const nsAString& aStringSpec, nsIContent* aContextNode);
void ResolveReferences(nsIContent* aContextNode);
void HandleNewInterval(nsSMILInterval& aInterval,
const nsSMILTimeContainer* aSrcContainer);
// For created nsSMILInstanceTime objects
PRBool DependsOnBegin() const;
void HandleChangedInstanceTime(const nsSMILInstanceTime& aBaseTime,
const nsSMILTimeContainer* aSrcContainer,
nsSMILInstanceTime& aInstanceTimeToUpdate,
PRBool aObjectChanged);
void HandleDeletedInstanceTime(nsSMILInstanceTime& aInstanceTime);
// Cycle-collection support
void Traverse(nsCycleCollectionTraversalCallback* aCallback);
void Unlink();
protected:
void UpdateTimebase(nsIContent* aFrom, nsIContent* aTo);
void UnregisterFromTimebase(nsSMILTimedElement* aTimedElement);
nsSMILTimedElement* GetTimedElementFromContent(nsIContent* aContent);
nsSMILTimedElement* GetTimebaseElement();
nsSMILTimeValue ConvertBetweenTimeContainers(const nsSMILTimeValue& aSrcTime,
const nsSMILTimeContainer* aSrcContainer);
nsSMILTimedElement* mOwner;
PRPackedBool mIsBegin; // Indicates if *we* are a begin spec,
// not to be confused with
// mParams.mSyncBegin which indicates
// if we're synced with the begin of
// the target.
nsSMILTimeValueSpecParams mParams;
class TimebaseElement : public nsReferencedElement {
public:
TimebaseElement(nsSMILTimeValueSpec* aOwner) : mSpec(aOwner) { }
protected:
virtual void ElementChanged(Element* aFrom, Element* aTo) {
nsReferencedElement::ElementChanged(aFrom, aTo);
mSpec->UpdateTimebase(aFrom, aTo);
}
virtual PRBool IsPersistent() { return PR_TRUE; }
private:
nsSMILTimeValueSpec* mSpec;
};
TimebaseElement mTimebase;
};
#endif // NS_SMILTIMEVALUESPEC_H_