1 files changed, 74 insertions, 0 deletions
diff --git a/dom/animation/AnimationUtils.h b/dom/animation/AnimationUtils.h
new file mode 100644
index 000000000..82ae69bc8
--- /dev/null
+++ b/dom/animation/AnimationUtils.h
@@ -0,0 +1,74 @@
+/* -*- 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_dom_AnimationUtils_h
+#define mozilla_dom_AnimationUtils_h
+
+#include "mozilla/TimeStamp.h"
+#include "mozilla/dom/Nullable.h"
+#include "nsStringFwd.h"
+
+class nsIContent;
+class nsIDocument;
+struct JSContext;
+
+namespace mozilla {
+
+class ComputedTimingFunction;
+
+class AnimationUtils
+{
+public:
+  static dom::Nullable<double>
+  TimeDurationToDouble(const dom::Nullable<TimeDuration>& aTime)
+  {
+    dom::Nullable<double> result;
+
+    if (!aTime.IsNull()) {
+      result.SetValue(aTime.Value().ToMilliseconds());
+    }
+
+    return result;
+  }
+
+  static dom::Nullable<TimeDuration>
+  DoubleToTimeDuration(const dom::Nullable<double>& aTime)
+  {
+    dom::Nullable<TimeDuration> result;
+
+    if (!aTime.IsNull()) {
+      result.SetValue(TimeDuration::FromMilliseconds(aTime.Value()));
+    }
+
+    return result;
+  }
+
+  static void LogAsyncAnimationFailure(nsCString& aMessage,
+                                       const nsIContent* aContent = nullptr);
+
+  /**
+   * Get the document from the JS context to use when parsing CSS properties.
+   */
+  static nsIDocument*
+  GetCurrentRealmDocument(JSContext* aCx);
+
+  /**
+   * Checks if offscreen animation throttling is enabled.
+   */
+  static bool
+  IsOffscreenThrottlingEnabled();
+
+  /**
+   * Returns true if the preference to enable the core Web Animations API is
+   * true or the caller is chrome.
+   */
+  static bool
+  IsCoreAPIEnabledForCaller();
+};
+
+} // namespace mozilla
+
+#endif