1 files changed, 130 insertions, 0 deletions
diff --git a/dom/animation/TimingParams.h b/dom/animation/TimingParams.h
new file mode 100644
index 0000000000..bfecee90cc
--- /dev/null
+++ b/dom/animation/TimingParams.h
@@ -0,0 +1,130 @@
+/* -*- 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_TimingParams_h
+#define mozilla_TimingParams_h
+
+#include "nsStringFwd.h"
+#include "mozilla/dom/Nullable.h"
+#include "mozilla/dom/UnionTypes.h" // For OwningUnrestrictedDoubleOrString
+#include "mozilla/ComputedTimingFunction.h"
+#include "mozilla/Maybe.h"
+#include "mozilla/StickyTimeDuration.h"
+#include "mozilla/TimeStamp.h" // for TimeDuration
+
+// X11 has a #define for None
+#ifdef None
+#undef None
+#endif
+#include "mozilla/dom/AnimationEffectReadOnlyBinding.h" // for FillMode
+                                                        // and PlaybackDirection
+
+class nsIDocument;
+
+namespace mozilla {
+
+namespace dom {
+class UnrestrictedDoubleOrKeyframeEffectOptions;
+class UnrestrictedDoubleOrKeyframeAnimationOptions;
+}
+
+struct TimingParams
+{
+  TimingParams() = default;
+
+  static TimingParams FromOptionsUnion(
+    const dom::UnrestrictedDoubleOrKeyframeEffectOptions& aOptions,
+    nsIDocument* aDocument, ErrorResult& aRv);
+  static TimingParams FromOptionsUnion(
+    const dom::UnrestrictedDoubleOrKeyframeAnimationOptions& aOptions,
+    nsIDocument* aDocument, ErrorResult& aRv);
+
+  // Range-checks and validates an UnrestrictedDoubleOrString or
+  // OwningUnrestrictedDoubleOrString object and converts to a
+  // StickyTimeDuration value or Nothing() if aDuration is "auto".
+  // Caller must check aRv.Failed().
+  template <class DoubleOrString>
+  static Maybe<StickyTimeDuration> ParseDuration(DoubleOrString& aDuration,
+                                                 ErrorResult& aRv)
+  {
+    Maybe<StickyTimeDuration> result;
+    if (aDuration.IsUnrestrictedDouble()) {
+      double durationInMs = aDuration.GetAsUnrestrictedDouble();
+      if (durationInMs >= 0) {
+        result.emplace(StickyTimeDuration::FromMilliseconds(durationInMs));
+      } else {
+        aRv.ThrowTypeError<dom::MSG_ENFORCE_RANGE_OUT_OF_RANGE>(
+          NS_LITERAL_STRING("duration"));
+      }
+    } else if (!aDuration.GetAsString().EqualsLiteral("auto")) {
+      aRv.ThrowTypeError<dom::MSG_INVALID_DURATION_ERROR>(
+        aDuration.GetAsString());
+    }
+    return result;
+  }
+
+  static void ValidateIterationStart(double aIterationStart,
+                                     ErrorResult& aRv)
+  {
+    if (aIterationStart < 0) {
+      aRv.ThrowTypeError<dom::MSG_ENFORCE_RANGE_OUT_OF_RANGE>(
+        NS_LITERAL_STRING("iterationStart"));
+    }
+  }
+
+  static void ValidateIterations(double aIterations, ErrorResult& aRv)
+  {
+    if (IsNaN(aIterations) || aIterations < 0) {
+      aRv.ThrowTypeError<dom::MSG_ENFORCE_RANGE_OUT_OF_RANGE>(
+        NS_LITERAL_STRING("iterations"));
+    }
+  }
+
+  static Maybe<ComputedTimingFunction> ParseEasing(const nsAString& aEasing,
+                                                   nsIDocument* aDocument,
+                                                   ErrorResult& aRv);
+
+  // mDuration.isNothing() represents the "auto" value
+  Maybe<StickyTimeDuration> mDuration;
+  TimeDuration mDelay;      // Initializes to zero
+  TimeDuration mEndDelay;
+  double mIterations = 1.0; // Can be NaN, negative, +/-Infinity
+  double mIterationStart = 0.0;
+  dom::PlaybackDirection mDirection = dom::PlaybackDirection::Normal;
+  dom::FillMode mFill = dom::FillMode::Auto;
+  Maybe<ComputedTimingFunction> mFunction;
+
+  // Return the duration of the active interval calculated by duration and
+  // iteration count.
+  StickyTimeDuration ActiveDuration() const
+  {
+    // If either the iteration duration or iteration count is zero,
+    // Web Animations says that the active duration is zero. This is to
+    // ensure that the result is defined when the other argument is Infinity.
+    static const StickyTimeDuration zeroDuration;
+    if (!mDuration || *mDuration == zeroDuration || mIterations == 0.0) {
+      return zeroDuration;
+    }
+
+    return mDuration->MultDouble(mIterations);
+  }
+
+  StickyTimeDuration EndTime() const
+  {
+    return std::max(mDelay + ActiveDuration() + mEndDelay,
+                    StickyTimeDuration());
+  }
+
+  bool operator==(const TimingParams& aOther) const;
+  bool operator!=(const TimingParams& aOther) const
+  {
+    return !(*this == aOther);
+  }
+};
+
+} // namespace mozilla
+
+#endif // mozilla_TimingParams_h