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LibWeb: Add preliminary support for CSS animations

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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>
This commit is contained in:
Ali Mohammad Pur 2023-05-26 23:30:54 +03:30 • committed by Andreas Kling
parent f07c4ffbc8
commit e90752cc21
31 changed files with 1062 additions and 12 deletions
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5
Userland/Libraries/LibWeb/CSS/CSSGroupingRule.cpp
View file

@ -54,6 +54,11 @@ void CSSGroupingRule::for_each_effective_style_rule(Function<void(CSSStyleRule c
m_rules->for_each_effective_style_rule(callback);
}
void CSSGroupingRule::for_each_effective_keyframes_at_rule(Function<void(CSSKeyframesRule const&)> const& callback) const
{
m_rules->for_each_effective_keyframes_at_rule(callback);
}
void CSSGroupingRule::set_parent_style_sheet(CSSStyleSheet* parent_style_sheet)
{
CSSRule::set_parent_style_sheet(parent_style_sheet);