1 files changed, 81 insertions, 0 deletions
diff --git a/dom/smil/SMILFloatType.cpp b/dom/smil/SMILFloatType.cpp
new file mode 100644
index 0000000000..ac50cfe8d2
--- /dev/null
+++ b/dom/smil/SMILFloatType.cpp
@@ -0,0 +1,81 @@
+/* -*- 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/. */
+
+#include "SMILFloatType.h"
+
+#include "mozilla/SMILValue.h"
+#include "nsDebug.h"
+#include <math.h>
+
+namespace mozilla {
+
+void SMILFloatType::Init(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
+  aValue.mU.mDouble = 0.0;
+  aValue.mType = this;
+}
+
+void SMILFloatType::Destroy(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
+  aValue.mU.mDouble = 0.0;
+  aValue.mType = SMILNullType::Singleton();
+}
+
+nsresult SMILFloatType::Assign(SMILValue& aDest, const SMILValue& aSrc) const {
+  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
+  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
+  aDest.mU.mDouble = aSrc.mU.mDouble;
+  return NS_OK;
+}
+
+bool SMILFloatType::IsEqual(const SMILValue& aLeft,
+                            const SMILValue& aRight) const {
+  MOZ_ASSERT(aLeft.mType == aRight.mType, "Incompatible SMIL types");
+  MOZ_ASSERT(aLeft.mType == this, "Unexpected type for SMIL value");
+
+  return aLeft.mU.mDouble == aRight.mU.mDouble;
+}
+
+nsresult SMILFloatType::Add(SMILValue& aDest, const SMILValue& aValueToAdd,
+                            uint32_t aCount) const {
+  MOZ_ASSERT(aValueToAdd.mType == aDest.mType, "Trying to add invalid types");
+  MOZ_ASSERT(aValueToAdd.mType == this, "Unexpected source type");
+  aDest.mU.mDouble += aValueToAdd.mU.mDouble * aCount;
+  return NS_OK;
+}
+
+nsresult SMILFloatType::ComputeDistance(const SMILValue& aFrom,
+                                        const SMILValue& aTo,
+                                        double& aDistance) const {
+  MOZ_ASSERT(aFrom.mType == aTo.mType, "Trying to compare different types");
+  MOZ_ASSERT(aFrom.mType == this, "Unexpected source type");
+
+  const double& from = aFrom.mU.mDouble;
+  const double& to = aTo.mU.mDouble;
+
+  aDistance = fabs(to - from);
+
+  return NS_OK;
+}
+
+nsresult SMILFloatType::Interpolate(const SMILValue& aStartVal,
+                                    const SMILValue& aEndVal,
+                                    double aUnitDistance,
+                                    SMILValue& aResult) const {
+  MOZ_ASSERT(aStartVal.mType == aEndVal.mType,
+             "Trying to interpolate different types");
+  MOZ_ASSERT(aStartVal.mType == this, "Unexpected types for interpolation");
+  MOZ_ASSERT(aResult.mType == this, "Unexpected result type");
+
+  const double& startVal = aStartVal.mU.mDouble;
+  const double& endVal = aEndVal.mU.mDouble;
+
+  aResult.mU.mDouble = (startVal + (endVal - startVal) * aUnitDistance);
+
+  return NS_OK;
+}
+
+}  // namespace mozilla