Index: third_party/WebKit/Source/core/animation/ScrollTimeline.h |
diff --git a/third_party/WebKit/Source/core/animation/ScrollTimeline.h b/third_party/WebKit/Source/core/animation/ScrollTimeline.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..ad37c5b08de874ccc590b13d2441eb7098361461 |
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+++ b/third_party/WebKit/Source/core/animation/ScrollTimeline.h |
@@ -0,0 +1,59 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef ScrollTimeline_h |
+#define ScrollTimeline_h |
+ |
+#include "core/CoreExport.h" |
+#include "core/animation/AnimationTimeline.h" |
+#include "core/animation/ScrollTimelineOptions.h" |
+#include "core/dom/Element.h" |
+#include "platform/bindings/ScriptWrappable.h" |
+#include "platform/wtf/text/WTFString.h" |
+ |
+namespace blink { |
+ |
+// Implements the ScrollTimeline concept from the Scroll-linked Animations spec. |
+// |
+// A ScrollTimeline is a special form of AnimationTimeline whose time values are |
+// not determined by wall-clock time but instead the progress of scrolling in a |
+// scroll container. The user is able to specify which scroll container to |
+// track, the direction of scroll they care about, and various attributes to |
+// control the conversion of scroll amount to time output. |
+// |
+// Spec: https://wicg.github.io/scroll-animations/#scroll-timelines |
+class CORE_EXPORT ScrollTimeline final : public AnimationTimeline { |
+ DEFINE_WRAPPERTYPEINFO(); |
+ |
+ public: |
+ enum ScrollDirection { |
+ Block, |
+ Inline, |
+ }; |
+ |
+ static ScrollTimeline* Create(Document&, |
+ ScrollTimelineOptions, |
+ ExceptionState&); |
+ |
+ // AnimationTimeline implementation. |
+ double currentTime(bool& is_null) final; |
+ |
+ // IDL API implementation. |
+ Element* scrollSource(); |
+ String orientation(); |
+ void timeRange(DoubleOrScrollTimelineAutoKeyword&); |
+ |
+ DECLARE_VIRTUAL_TRACE(); |
+ |
+ private: |
+ ScrollTimeline(const Document&, Element*, ScrollDirection, double); |
+ |
+ Member<Element> scroll_source_; |
+ ScrollDirection orientation_; |
+ double time_range_; |
+}; |
+ |
+} // namespace blink |
+ |
+#endif |