1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/smil/nsSMILRepeatCount.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,61 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef nsSMILRepeatCount_h
1.10 +#define nsSMILRepeatCount_h
1.11 +
1.12 +#include "nsDebug.h"
1.13 +#include <math.h>
1.14 +
1.15 +//----------------------------------------------------------------------
1.16 +// nsSMILRepeatCount
1.17 +//
1.18 +// A tri-state non-negative floating point number for representing the number of
1.19 +// times an animation repeat, i.e. the SMIL repeatCount attribute.
1.20 +//
1.21 +// The three states are:
1.22 +// 1. not-set
1.23 +// 2. set (with non-negative, non-zero count value)
1.24 +// 3. indefinite
1.25 +//
1.26 +class nsSMILRepeatCount
1.27 +{
1.28 +public:
1.29 + nsSMILRepeatCount() : mCount(kNotSet) {}
1.30 + explicit nsSMILRepeatCount(double aCount)
1.31 + : mCount(kNotSet) { SetCount(aCount); }
1.32 +
1.33 + operator double() const {
1.34 + MOZ_ASSERT(IsDefinite(),
1.35 + "Converting indefinite or unset repeat count to double");
1.36 + return mCount;
1.37 + }
1.38 + bool IsDefinite() const {
1.39 + return mCount != kNotSet && mCount != kIndefinite;
1.40 + }
1.41 + bool IsIndefinite() const { return mCount == kIndefinite; }
1.42 + bool IsSet() const { return mCount != kNotSet; }
1.43 +
1.44 + nsSMILRepeatCount& operator=(double aCount)
1.45 + {
1.46 + SetCount(aCount);
1.47 + return *this;
1.48 + }
1.49 + void SetCount(double aCount)
1.50 + {
1.51 + NS_ASSERTION(aCount > 0.0, "Negative or zero repeat count");
1.52 + mCount = aCount > 0.0 ? aCount : kNotSet;
1.53 + }
1.54 + void SetIndefinite() { mCount = kIndefinite; }
1.55 + void Unset() { mCount = kNotSet; }
1.56 +
1.57 +private:
1.58 + static const double kNotSet;
1.59 + static const double kIndefinite;
1.60 +
1.61 + double mCount;
1.62 +};
1.63 +
1.64 +#endif
