зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
4.0 KiB
C++
112 строки
4.0 KiB
C++
/* -*- 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_KeyframeUtils_h
|
|
#define mozilla_KeyframeUtils_h
|
|
|
|
#include "mozilla/KeyframeEffectParams.h" // For CompositeOperation
|
|
#include "nsCSSPropertyID.h"
|
|
#include "nsTArrayForwardDeclare.h" // For nsTArray
|
|
#include "js/RootingAPI.h" // For JS::Handle
|
|
|
|
struct JSContext;
|
|
class JSObject;
|
|
struct RawServoDeclarationBlock;
|
|
|
|
namespace mozilla {
|
|
struct AnimationProperty;
|
|
class ComputedStyle;
|
|
|
|
enum class PseudoStyleType : uint8_t;
|
|
class ErrorResult;
|
|
struct Keyframe;
|
|
struct PropertyStyleAnimationValuePair;
|
|
|
|
namespace dom {
|
|
class Document;
|
|
class Element;
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
namespace mozilla {
|
|
|
|
// Represents the set of property-value pairs on a Keyframe converted to
|
|
// computed values.
|
|
using ComputedKeyframeValues = nsTArray<PropertyStyleAnimationValuePair>;
|
|
|
|
/**
|
|
* Utility methods for processing keyframes.
|
|
*/
|
|
class KeyframeUtils {
|
|
public:
|
|
/**
|
|
* Converts a JS value representing a property-indexed keyframe or a sequence
|
|
* of keyframes to an array of Keyframe objects.
|
|
*
|
|
* @param aCx The JSContext that corresponds to |aFrames|.
|
|
* @param aDocument The document to use when parsing CSS properties.
|
|
* @param aFrames The JS value, provided as an optional IDL |object?| value,
|
|
* that is the keyframe list specification.
|
|
* @param aContext Information about who is trying to get keyframes from the
|
|
* object, for use in error reporting. This must be be a non-null
|
|
* pointer representing a null-terminated ASCII string.
|
|
* @param aRv (out) Out-param to hold any error returned by this function.
|
|
* Must be initially empty.
|
|
* @return The set of processed keyframes. If an error occurs, aRv will be
|
|
* filled-in with the appropriate error code and an empty array will be
|
|
* returned.
|
|
*/
|
|
static nsTArray<Keyframe> GetKeyframesFromObject(
|
|
JSContext* aCx, dom::Document* aDocument, JS::Handle<JSObject*> aFrames,
|
|
const char* aContext, ErrorResult& aRv);
|
|
|
|
/**
|
|
* Calculate the computed offset of keyframes by evenly distributing keyframes
|
|
* with a missing offset.
|
|
*
|
|
* @see
|
|
* https://drafts.csswg.org/web-animations/#calculating-computed-keyframes
|
|
*
|
|
* @param aKeyframes The set of keyframes to adjust.
|
|
*/
|
|
static void DistributeKeyframes(nsTArray<Keyframe>& aKeyframes);
|
|
|
|
/**
|
|
* Converts an array of Keyframe objects into an array of AnimationProperty
|
|
* objects. This involves creating an array of computed values for each
|
|
* longhand property and determining the offset and timing function to use
|
|
* for each value.
|
|
*
|
|
* @param aKeyframes The input keyframes.
|
|
* @param aElement The context element.
|
|
* @param aStyle The computed style values.
|
|
* @param aEffectComposite The composite operation specified on the effect.
|
|
* For any keyframes in |aKeyframes| that do not specify a composite
|
|
* operation, this value will be used.
|
|
* @return The set of animation properties. If an error occurs, the returned
|
|
* array will be empty.
|
|
*/
|
|
static nsTArray<AnimationProperty> GetAnimationPropertiesFromKeyframes(
|
|
const nsTArray<Keyframe>& aKeyframes, dom::Element* aElement,
|
|
PseudoStyleType aPseudoType, const ComputedStyle* aStyle,
|
|
dom::CompositeOperation aEffectComposite);
|
|
|
|
/**
|
|
* Check if the property or, for shorthands, one or more of
|
|
* its subproperties, is animatable.
|
|
*
|
|
* @param aProperty The property to check.
|
|
* @param aBackend The style backend, Servo or Gecko, that should determine
|
|
* if the property is animatable or not.
|
|
* @return true if |aProperty| is animatable.
|
|
*/
|
|
static bool IsAnimatableProperty(nsCSSPropertyID aProperty);
|
|
};
|
|
|
|
} // namespace mozilla
|
|
|
|
#endif // mozilla_KeyframeUtils_h
|