1 files changed, 62 insertions, 0 deletions
diff --git a/dom/smil/SMILRepeatCount.h b/dom/smil/SMILRepeatCount.h
new file mode 100644
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+++ b/dom/smil/SMILRepeatCount.h
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+/* -*- 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 DOM_SMIL_SMILREPEATCOUNT_H_
+#define DOM_SMIL_SMILREPEATCOUNT_H_
+
+#include "nsDebug.h"
+#include <math.h>
+
+namespace mozilla {
+
+//----------------------------------------------------------------------
+// SMILRepeatCount
+//
+// 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 SMILRepeatCount {
+ public:
+  SMILRepeatCount() : mCount(kNotSet) {}
+  explicit SMILRepeatCount(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; }
+
+  SMILRepeatCount& 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;
+};
+
+}  // namespace mozilla
+
+#endif  // DOM_SMIL_SMILREPEATCOUNT_H_