gecko-dev/content/smil/nsSMILRepeatCount.h

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C
Исходник Обычный вид История

/* -*- 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) 2009
* 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 ***** */
#include "prtypes.h"
#include "nsDebug.h"
#include <math.h>
//----------------------------------------------------------------------
// nsSMILRepeatCount
//
// A tri-state non-negative floating point number for representing the number of
// times an animation repeat, i.e. the SMIL repeatCount attribute.
//
// The three states are:
// 1. not-set
// 2. set (with non-negative, non-zero count value)
// 3. indefinite
//
class nsSMILRepeatCount
{
public:
nsSMILRepeatCount() : mCount(kNotSet) {}
explicit nsSMILRepeatCount(double aCount)
: mCount(kNotSet) { SetCount(aCount); }
operator double() const { return mCount; }
bool IsDefinite() const {
return mCount != kNotSet && mCount != kIndefinite;
}
bool IsIndefinite() const { return mCount == kIndefinite; }
bool IsSet() const { return mCount != kNotSet; }
nsSMILRepeatCount& operator=(double aCount)
{
SetCount(aCount);
return *this;
}
void SetCount(double aCount)
{
NS_ASSERTION(aCount > 0.0, "Negative or zero repeat count");
mCount = aCount > 0.0 ? aCount : kNotSet;
}
void SetIndefinite() { mCount = kIndefinite; }
void Unset() { mCount = kNotSet; }
private:
static const double kNotSet;
static const double kIndefinite;
double mCount;
};