/* -*- 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 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