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LibWeb: Add preliminary support for CSS animations
This partially implements CSS-Animations-1 (though there are references to CSS-Animations-2). Current limitations: - Multi-selector keyframes are not supported. - Most animation properties are ignored. - Timing functions are not applied. - Non-absolute values are not interpolated unless the target is also of the same non-absolute type (e.g. 10% -> 25%, but not 10% -> 20px). - The JavaScript interface is left as an exercise for the next poor soul looking at this code. With those said, this commit implements: - Interpolation for most common types - Proper keyframe resolution (including the synthetic from-keyframe containing the initial state) - Properly driven animations, and proper style invalidation Co-Authored-By: Andreas Kling <kling@serenityos.org>
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31 changed files with 1062 additions and 12 deletions
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@ -53,7 +53,8 @@ class PropertyOwningCSSStyleDeclaration : public CSSStyleDeclaration {
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friend class ElementInlineCSSStyleDeclaration;
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public:
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<PropertyOwningCSSStyleDeclaration>> create(JS::Realm&, Vector<StyleProperty>, HashMap<DeprecatedString, StyleProperty> custom_properties);
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<PropertyOwningCSSStyleDeclaration>>
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create(JS::Realm&, Vector<StyleProperty>, HashMap<DeprecatedString, StyleProperty> custom_properties);
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virtual ~PropertyOwningCSSStyleDeclaration() override = default;
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