1 files changed, 103 insertions, 0 deletions
diff --git a/dom/svg/SVGLengthSMILType.cpp b/dom/svg/SVGLengthSMILType.cpp
new file mode 100644
index 0000000000..45650a602e
--- /dev/null
+++ b/dom/svg/SVGLengthSMILType.cpp
@@ -0,0 +1,103 @@
+/* -*- 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 "SVGLengthSMILType.h"
+
+#include "mozilla/SMILValue.h"
+#include "SVGAnimatedLengthList.h"
+#include "nsDebug.h"
+#include <math.h>
+
+namespace mozilla {
+
+using namespace dom::SVGLength_Binding;
+
+void SVGLengthSMILType::Init(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.IsNull(), "Unexpected value type");
+
+  aValue.mU.mPtr = new SVGLengthAndInfo();
+  aValue.mType = this;
+}
+
+void SVGLengthSMILType::Destroy(SMILValue& aValue) const {
+  MOZ_ASSERT(aValue.mType == this, "Unexpected SMIL value");
+  delete static_cast<SVGLengthAndInfo*>(aValue.mU.mPtr);
+  aValue.mU.mPtr = nullptr;
+  aValue.mType = SMILNullType::Singleton();
+}
+
+nsresult SVGLengthSMILType::Assign(SMILValue& aDest,
+                                   const SMILValue& aSrc) const {
+  MOZ_ASSERT(aDest.mType == aSrc.mType, "Incompatible SMIL types");
+  MOZ_ASSERT(aDest.mType == this, "Unexpected SMIL value");
+
+  auto* src = static_cast<const SVGLengthAndInfo*>(aSrc.mU.mPtr);
+  auto* dest = static_cast<SVGLengthAndInfo*>(aDest.mU.mPtr);
+  dest->CopyFrom(*src);
+
+  return NS_OK;
+}
+
+bool SVGLengthSMILType::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 *static_cast<const SVGLengthAndInfo*>(aLeft.mU.mPtr) ==
+         *static_cast<const SVGLengthAndInfo*>(aRight.mU.mPtr);
+}
+
+nsresult SVGLengthSMILType::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");
+
+  auto& dest = *static_cast<SVGLengthAndInfo*>(aDest.mU.mPtr);
+  const auto& valueToAdd =
+      *static_cast<const SVGLengthAndInfo*>(aValueToAdd.mU.mPtr);
+
+  dest.Add(valueToAdd, aCount);
+  return NS_OK;
+}
+
+nsresult SVGLengthSMILType::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 auto& from = *static_cast<SVGLengthAndInfo*>(aFrom.mU.mPtr);
+  const auto& to = *static_cast<const SVGLengthAndInfo*>(aTo.mU.mPtr);
+
+  MOZ_ASSERT(from.Element() == to.Element());
+
+  dom::SVGElementMetrics metrics(from.Element());
+
+  // Normalize both to pixels in case they're different units:
+  aDistance = fabs(to.ValueInPixels(metrics) - from.ValueInPixels(metrics));
+
+  return NS_OK;
+}
+
+nsresult SVGLengthSMILType::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 auto& start = *static_cast<SVGLengthAndInfo*>(aStartVal.mU.mPtr);
+  const auto& end = *static_cast<const SVGLengthAndInfo*>(aEndVal.mU.mPtr);
+  auto& result = *static_cast<SVGLengthAndInfo*>(aResult.mU.mPtr);
+
+  SVGLengthAndInfo::Interpolate(start, end, aUnitDistance, result);
+
+  return NS_OK;
+}
+
+}  // namespace mozilla