The Tor Browser: dom/smil/nsSMILRepeatCount.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef nsSMILRepeatCount_h

     7 #define nsSMILRepeatCount_h

     9 #include "nsDebug.h"

    10 #include <math.h>

    12 //----------------------------------------------------------------------

    13 // nsSMILRepeatCount

    14 //

    15 // A tri-state non-negative floating point number for representing the number of

    16 // times an animation repeat, i.e. the SMIL repeatCount attribute.

    17 //

    18 // The three states are:

    19 //  1. not-set

    20 //  2. set (with non-negative, non-zero count value)

    21 //  3. indefinite

    22 //

    23 class nsSMILRepeatCount

    24 {

    25 public:

    26   nsSMILRepeatCount() : mCount(kNotSet) {}

    27   explicit nsSMILRepeatCount(double aCount)

    28     : mCount(kNotSet) { SetCount(aCount); }

    30   operator double() const {

    31     MOZ_ASSERT(IsDefinite(),

    32       "Converting indefinite or unset repeat count to double");

    33     return mCount;

    34   }

    35   bool IsDefinite() const {

    36     return mCount != kNotSet && mCount != kIndefinite;

    37   }

    38   bool IsIndefinite() const { return mCount == kIndefinite; }

    39   bool IsSet() const { return mCount != kNotSet; }

    41   nsSMILRepeatCount& operator=(double aCount)

    42   {

    43     SetCount(aCount);

    44     return *this;

    45   }

    46   void SetCount(double aCount)

    47   {

    48     NS_ASSERTION(aCount > 0.0, "Negative or zero repeat count");

    49     mCount = aCount > 0.0 ? aCount : kNotSet;

    50   }

    51   void SetIndefinite() { mCount = kIndefinite; }

    52   void Unset() { mCount = kNotSet; }

    54 private:

    55   static const double kNotSet;

    56   static const double kIndefinite;

    58   double  mCount;

    59 };

    61 #endif

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