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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 DOM_SMIL_SMILREPEATCOUNT_H_
#define DOM_SMIL_SMILREPEATCOUNT_H_
#include "nsDebug.h"
#include <math.h>
namespace mozilla {
//----------------------------------------------------------------------
// SMILRepeatCount
//
// 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 SMILRepeatCount {
public:
SMILRepeatCount() : mCount(kNotSet) {}
explicit SMILRepeatCount(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; }
SMILRepeatCount& 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;
};
} // namespace mozilla
#endif // DOM_SMIL_SMILREPEATCOUNT_H_
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