62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsSMILRepeatCount_h
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#define nsSMILRepeatCount_h
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#include "nsDebug.h"
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#include <math.h>
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//----------------------------------------------------------------------
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// nsSMILRepeatCount
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//
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// A tri-state non-negative floating point number for representing the number of
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// times an animation repeat, i.e. the SMIL repeatCount attribute.
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//
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// The three states are:
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// 1. not-set
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// 2. set (with non-negative, non-zero count value)
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// 3. indefinite
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//
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class nsSMILRepeatCount
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{
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public:
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nsSMILRepeatCount() : mCount(kNotSet) {}
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explicit nsSMILRepeatCount(double aCount)
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: mCount(kNotSet) { SetCount(aCount); }
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operator double() const {
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MOZ_ASSERT(IsDefinite(),
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"Converting indefinite or unset repeat count to double");
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return mCount;
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}
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bool IsDefinite() const {
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return mCount != kNotSet && mCount != kIndefinite;
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}
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bool IsIndefinite() const { return mCount == kIndefinite; }
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bool IsSet() const { return mCount != kNotSet; }
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nsSMILRepeatCount& operator=(double aCount)
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{
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SetCount(aCount);
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return *this;
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}
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void SetCount(double aCount)
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{
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NS_ASSERTION(aCount > 0.0, "Negative or zero repeat count");
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mCount = aCount > 0.0 ? aCount : kNotSet;
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}
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void SetIndefinite() { mCount = kIndefinite; }
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void Unset() { mCount = kNotSet; }
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private:
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static const double kNotSet;
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static const double kIndefinite;
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double mCount;
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};
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#endif
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