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-rw-r--r--layout/style/StyleAnimationValue.h133
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diff --git a/layout/style/StyleAnimationValue.h b/layout/style/StyleAnimationValue.h
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+/* -*- 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/. */
+
+/* Utilities for animation of computed style values */
+
+#ifndef mozilla_StyleAnimationValue_h_
+#define mozilla_StyleAnimationValue_h_
+
+#include "mozilla/gfx/MatrixFwd.h"
+#include "mozilla/gfx/Point.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/ServoStyleConsts.h" // Servo_AnimationValue_Dump
+#include "mozilla/DbgMacro.h"
+#include "nsStringFwd.h"
+#include "nsStringBuffer.h"
+#include "nsCoord.h"
+#include "nsColor.h"
+#include "nsCSSPropertyID.h"
+#include "nsCSSValue.h"
+#include "nsStyleConsts.h"
+#include "nsStyleTransformMatrix.h"
+
+class nsIFrame;
+class gfx3DMatrix;
+
+namespace mozilla {
+
+namespace css {
+class StyleRule;
+} // namespace css
+
+namespace dom {
+class Element;
+} // namespace dom
+
+namespace layers {
+class Animatable;
+} // namespace layers
+
+enum class PseudoStyleType : uint8_t;
+struct PropertyStyleAnimationValuePair;
+
+struct AnimationValue {
+ explicit AnimationValue(const RefPtr<StyleAnimationValue>& aValue)
+ : mServo(aValue) {}
+ AnimationValue() = default;
+
+ AnimationValue(const AnimationValue& aOther) = default;
+ AnimationValue(AnimationValue&& aOther) = default;
+
+ AnimationValue& operator=(const AnimationValue& aOther) = default;
+ AnimationValue& operator=(AnimationValue&& aOther) = default;
+
+ bool operator==(const AnimationValue& aOther) const;
+ bool operator!=(const AnimationValue& aOther) const;
+
+ bool IsNull() const { return !mServo; }
+
+ float GetOpacity() const;
+
+ // Returns nscolor value in this AnimationValue.
+ // Currently only background-color is supported.
+ nscolor GetColor(nscolor aForegroundColor) const;
+
+ // Returns true if this AnimationValue is current-color.
+ // Currently only background-color is supported.
+ bool IsCurrentColor() const;
+
+ // Return a transform list for the transform property.
+ const mozilla::StyleTransform& GetTransformProperty() const;
+ const mozilla::StyleScale& GetScaleProperty() const;
+ const mozilla::StyleTranslate& GetTranslateProperty() const;
+ const mozilla::StyleRotate& GetRotateProperty() const;
+
+ // Motion path properties.
+ const mozilla::StyleOffsetPath& GetOffsetPathProperty() const;
+ const mozilla::LengthPercentage& GetOffsetDistanceProperty() const;
+ const mozilla::StyleOffsetRotate& GetOffsetRotateProperty() const;
+ const mozilla::StylePositionOrAuto& GetOffsetAnchorProperty() const;
+
+ // Return the scale for mServo, which is calculated with reference to aFrame.
+ mozilla::gfx::MatrixScales GetScaleValue(const nsIFrame* aFrame) const;
+
+ // Uncompute this AnimationValue and then serialize it.
+ void SerializeSpecifiedValue(nsCSSPropertyID aProperty,
+ const StylePerDocumentStyleData* aRawData,
+ nsACString& aString) const;
+
+ // Check if |*this| and |aToValue| can be interpolated.
+ bool IsInterpolableWith(nsCSSPropertyID aProperty,
+ const AnimationValue& aToValue) const;
+
+ // Compute the distance between *this and aOther.
+ double ComputeDistance(nsCSSPropertyID aProperty,
+ const AnimationValue& aOther) const;
+
+ // Create an AnimaitonValue from a string. This method flushes style, so we
+ // should use this carefully. Now, it is only used by
+ // nsDOMWindowUtils::ComputeAnimationDistance.
+ static AnimationValue FromString(nsCSSPropertyID aProperty,
+ const nsACString& aValue,
+ dom::Element* aElement);
+
+ // Create an already_AddRefed<StyleAnimationValue> from a
+ // layers::Animatable. Basically, this function should return AnimationValue,
+ // but it seems the caller, AnimationHelper, only needs
+ // StyleAnimationValue, so we return its already_AddRefed<> to avoid
+ // adding/removing a redundant ref-count.
+ static already_AddRefed<StyleAnimationValue> FromAnimatable(
+ nsCSSPropertyID aProperty, const layers::Animatable& aAnimatable);
+
+ RefPtr<StyleAnimationValue> mServo;
+};
+
+inline std::ostream& operator<<(std::ostream& aOut,
+ const AnimationValue& aValue) {
+ MOZ_ASSERT(aValue.mServo);
+ nsAutoCString s;
+ Servo_AnimationValue_Dump(aValue.mServo, &s);
+ return aOut << s;
+}
+
+struct PropertyStyleAnimationValuePair {
+ nsCSSPropertyID mProperty;
+ AnimationValue mValue;
+};
+} // namespace mozilla
+
+#endif