gecko-dev/content/smil/nsSMILTimeValueSpec.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * 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
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 *
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 * 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>
 *
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 * 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"),
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#include "nsSMILTimeValueSpec.h"
#include "nsSMILTimeValue.h"
#include "nsSMILTimedElement.h"
#include "nsSMILInstanceTime.h"
#include "nsSMILParserUtils.h"
#include "nsString.h"
#include "nsAutoPtr.h"

//----------------------------------------------------------------------
// Implementation

already_AddRefed<nsSMILTimeValueSpec>
NS_NewSMILTimeValueSpec(nsSMILTimedElement* aOwner,
                        PRBool aIsBegin,
                        const nsAString& aStringSpec)
{
  nsSMILTimeValueSpec* result = new nsSMILTimeValueSpec(aOwner, aIsBegin);
  NS_ENSURE_TRUE(result, nsnull);

  NS_ADDREF(result); // Need to addref as SetSpec calls getWeakReference
  nsresult rv = result->SetSpec(aStringSpec);
  if (NS_FAILED(rv)) {
    NS_RELEASE(result);
    return nsnull;
  }
  return result;
}

nsSMILTimeValueSpec::nsSMILTimeValueSpec(nsSMILTimedElement* aOwner,
                                         PRBool aIsBegin)
  : mOwner(aOwner),
    mIsBegin(aIsBegin),
    mOffset() // initalises to zero
{
}

//----------------------------------------------------------------------
// nsISupports

NS_IMPL_ISUPPORTS1(nsSMILTimeValueSpec,
                   nsISupports)

//----------------------------------------------------------------------
// nsSMILTimeValueSpec

nsresult
nsSMILTimeValueSpec::SetSpec(const nsAString& aStringSpec)
{
  // XXX Need to parse other specifiers, not just offset type
  nsSMILTimeValue clockTime;
  nsresult rv = nsSMILParserUtils::ParseClockValue(aStringSpec, &clockTime,
                              nsSMILParserUtils::kClockValueAllowSign
                              | nsSMILParserUtils::kClockValueAllowIndefinite);

  if (NS_FAILED(rv) || (!clockTime.IsResolved() && !clockTime.IsIndefinite()))
    return NS_ERROR_FAILURE;

  if (clockTime.IsResolved())
    mOffset = clockTime.GetMillis();

  if (mOwner) {
    nsSMILInstanceTime instance(clockTime, this);
    mOwner->AddInstanceTime(instance, mIsBegin);
  }

  return rv;
}