1 files changed, 51 insertions, 0 deletions
diff --git a/dom/smil/SMILStringType.h b/dom/smil/SMILStringType.h
new file mode 100644
index 000000000..6f160cadb
--- /dev/null
+++ b/dom/smil/SMILStringType.h
@@ -0,0 +1,51 @@
+/* -*- 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 MOZILLA_SMILSTRINGTYPE_H_
+#define MOZILLA_SMILSTRINGTYPE_H_
+
+#include "mozilla/Attributes.h"
+#include "nsISMILType.h"
+
+namespace mozilla {
+
+class SMILStringType : public nsISMILType
+{
+public:
+  // Singleton for nsSMILValue objects to hold onto.
+  static SMILStringType*
+  Singleton()
+  {
+    static SMILStringType sSingleton;
+    return &sSingleton;
+  }
+
+protected:
+  // nsISMILType Methods
+  // -------------------
+  virtual void Init(nsSMILValue& aValue) const override;
+  virtual void Destroy(nsSMILValue& aValue) const override;
+  virtual nsresult Assign(nsSMILValue& aDest, const nsSMILValue& aSrc) const override;
+  virtual bool IsEqual(const nsSMILValue& aLeft,
+                       const nsSMILValue& aRight) const override;
+  virtual nsresult Add(nsSMILValue& aDest, const nsSMILValue& aValueToAdd,
+                       uint32_t aCount) const override;
+  virtual nsresult ComputeDistance(const nsSMILValue& aFrom,
+                                   const nsSMILValue& aTo,
+                                   double& aDistance) const override;
+  virtual nsresult Interpolate(const nsSMILValue& aStartVal,
+                               const nsSMILValue& aEndVal,
+                               double aUnitDistance,
+                               nsSMILValue& aResult) const override;
+
+private:
+  // Private constructor: prevent instances beyond my singleton.
+  constexpr SMILStringType() {}
+};
+
+} // namespace mozilla
+
+#endif // MOZILLA_SMILSTRINGTYPE_H_