class/System.Windows/System.Windows.Media.Animation/RepeatBehavior.cs

   1 //
   2 // RepeatBehavior.cs
   3 //
   4 // Contact:
   5 //   Moonlight List (moonlight-list@lists.ximian.com)
   6 //
   7 // Copyright 2007, 2009 Novell, Inc.
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 namespace System.Windows.Media.Animation {
  29
  30         public struct RepeatBehavior : IFormattable {
  31
  32                 // note: Count is default for the (default) empty ctor, so it needs to have a 0 value
  33                 enum RepeatBehaviorKind {
  34                         Count,
  35                         TimeSpan,
  36                         Forever
  37                 }
  38
  39                 private RepeatBehaviorKind kind;
  40                 private int padding;
  41                 private double count;
  42                 private TimeSpan duration;
  43
  44                 private RepeatBehavior (RepeatBehaviorKind kind, double count, TimeSpan duration)
  45                 {
  46                         this.kind = kind;
  47                         this.count = count;
  48                         this.duration = duration;
  49                         this.padding = 0;
  50                 }
  51
  52                 public RepeatBehavior (double count)
  53                 {
  54                         if ((count < 0) || Double.IsNaN (count) || Double.IsInfinity (count))
  55                                 throw new ArgumentOutOfRangeException ("count");
  56
  57                         kind = RepeatBehaviorKind.Count;
  58                         this.count = count;
  59                         duration = TimeSpan.Zero;
  60                         padding = 0;
  61                 }
  62
  63                 public RepeatBehavior (TimeSpan duration)
  64                 {
  65                         if (duration.Ticks < 0)
  66                                 throw new ArgumentOutOfRangeException ("duration");
  67
  68                         kind = RepeatBehaviorKind.TimeSpan;
  69                         this.duration = duration;
  70                         count = 0;
  71                         padding = 0;
  72                 }
  73
  74                 public double Count {
  75                         get {
  76                                 if (kind == RepeatBehaviorKind.Count)
  77                                         return count;
  78                                 throw new InvalidOperationException ("This RepeatBehavior does not contain a Count");
  79                         }
  80                 }
  81
  82                 public TimeSpan Duration {
  83                         get {
  84                                 if (kind == RepeatBehaviorKind.TimeSpan)
  85                                         return duration;
  86                                 throw new InvalidOperationException ("This RepeatBehavior does not contain a Duration");
  87                         }
  88                 }
  89
  90                 public static RepeatBehavior Forever {
  91                         get { return new RepeatBehavior (RepeatBehaviorKind.Forever, 0, TimeSpan.Zero); }
  92                 }
  93
  94
  95                 public bool HasCount {
  96                         get { return kind == RepeatBehaviorKind.Count; }
  97                 }
  98
  99                 public bool HasDuration {
 100                         get { return kind == RepeatBehaviorKind.TimeSpan; }
 101                 }
 102
 103                 public override bool Equals (object value)
 104                 {
 105                         if (!(value is RepeatBehavior))
 106                                 return false;
 107
 108                         return Equals (this, (RepeatBehavior) value);
 109                 }
 110
 111                 public bool Equals (RepeatBehavior repeatBehavior)
 112                 {
 113                         return Equals (this, repeatBehavior);
 114                 }
 115
 116                 public static bool Equals (RepeatBehavior repeatBehavior1, RepeatBehavior repeatBehavior2)
 117                 {
 118                         if (repeatBehavior1.kind != repeatBehavior2.kind)
 119                                 return false;
 120
 121                         switch (repeatBehavior1.kind) {
 122                         case RepeatBehaviorKind.Count:
 123                                 return repeatBehavior1.count == repeatBehavior2.count;
 124                         case RepeatBehaviorKind.TimeSpan:
 125                                 return repeatBehavior1.duration == repeatBehavior2.duration;
 126                         case RepeatBehaviorKind.Forever:
 127                                 return true;
 128                         default:
 129                                 return false;
 130                         }
 131                 }
 132
 133                 public static bool operator == (RepeatBehavior repeatBehavior1, RepeatBehavior repeatBehavior2)
 134                 {
 135                         return Equals (repeatBehavior1, repeatBehavior2);
 136                 }
 137
 138                 public static bool operator != (RepeatBehavior repeatBehavior1, RepeatBehavior repeatBehavior2)
 139                 {
 140                         return !Equals (repeatBehavior1, repeatBehavior2);
 141                 }
 142
 143                 public override int GetHashCode ()
 144                 {
 145                         switch (kind) {
 146                         case RepeatBehaviorKind.Count:
 147                                 return count.GetHashCode ();
 148                         case RepeatBehaviorKind.TimeSpan:
 149                                 return duration.GetHashCode ();
 150                         case RepeatBehaviorKind.Forever:
 151                                 return RepeatBehaviorKind.Forever.GetHashCode ();
 152                         default:
 153                                 return base.GetHashCode ();
 154                         }
 155                 }
 156
 157                 public override string ToString ()
 158                 {
 159                         switch (kind) {
 160                         case RepeatBehaviorKind.Forever:
 161                                 return "Forever";
 162                         case RepeatBehaviorKind.Count:
 163                                 return String.Format ("{0}x", count);
 164                         case RepeatBehaviorKind.TimeSpan:
 165                                 return duration.ToString ();
 166                         default:
 167                                 return base.ToString ();
 168                         }
 169                 }
 170
 171                 public string ToString (IFormatProvider formatProvider)
 172                 {
 173                         return (this as IFormattable).ToString (null, formatProvider);
 174                 }
 175
 176                 string System.IFormattable.ToString (string format, IFormatProvider formatProvider)
 177                 {
 178                         if (kind != RepeatBehaviorKind.Count)
 179                                 return ToString ();
 180
 181                         if (String.IsNullOrEmpty (format))
 182                                 format = null;
 183
 184                         if (formatProvider != null) {
 185                                 ICustomFormatter cp = (ICustomFormatter) formatProvider.GetFormat (typeof (ICustomFormatter));
 186                                 if (cp != null) {
 187                                         return String.Format ("{0}x", cp.Format (format, count, formatProvider));
 188                                 }
 189                         }
 190
 191                         return String.Format ("{0}x", count.ToString (format, formatProvider));
 192                 }
 193         }
 194 }