1 files changed, 92 insertions, 0 deletions
diff --git a/dom/animation/AnimationUtils.h b/dom/animation/AnimationUtils.h
new file mode 100644
index 0000000000..b1c329b22e
--- /dev/null
+++ b/dom/animation/AnimationUtils.h
@@ -0,0 +1,92 @@
+/* -*- 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/BindingDeclarations.h"
+#include "mozilla/dom/Nullable.h"
+#include "nsRFPService.h"
+#include "nsStringFwd.h"
+
+class nsIContent;
+class nsIFrame;
+struct JSContext;
+
+namespace mozilla {
+
+enum class PseudoStyleType : uint8_t;
+class ComputedTimingFunction;
+class EffectSet;
+
+namespace dom {
+class Document;
+class Element;
+}  // namespace dom
+
+class AnimationUtils {
+ public:
+  typedef dom::Document Document;
+
+  static dom::Nullable<double> TimeDurationToDouble(
+      const dom::Nullable<TimeDuration>& aTime) {
+    dom::Nullable<double> result;
+
+    if (!aTime.IsNull()) {
+      // 0 is an inappropriate mixin for this this area; however CSS Animations
+      // needs to have it's Time Reduction Logic refactored, so it's currently
+      // only clamping for RFP mode. RFP mode gives a much lower time precision,
+      // so we accept the security leak here for now
+      result.SetValue(nsRFPService::ReduceTimePrecisionAsMSecsRFPOnly(
+          aTime.Value().ToMilliseconds(), 0));
+    }
+
+    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 Document* GetCurrentRealmDocument(JSContext* aCx);
+
+  /**
+   * Get the document from the global object, or nullptr if the document has
+   * no window, to use when constructing DOM object without entering the
+   * target window's compartment (see KeyframeEffect constructor).
+   */
+  static Document* GetDocumentFromGlobal(JSObject* aGlobalObject);
+
+  /**
+   * Returns true if the given frame has an animated scale.
+   */
+  static bool FrameHasAnimatedScale(const nsIFrame* aFrame);
+
+  /**
+   * Returns true if the given (pseudo-)element has any transitions that are
+   * current (playing or waiting to play) or in effect (e.g. filling forwards).
+   */
+  static bool HasCurrentTransitions(const dom::Element* aElement,
+                                    PseudoStyleType aPseudoType);
+};
+
+}  // namespace mozilla
+
+#endif