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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef nsSMILRepeatCount_h
#define nsSMILRepeatCount_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 {
MOZ_ASSERT(IsDefinite(),
"Converting indefinite or unset repeat count to double");
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;
};
#endif
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