ladybird/Userland/Libraries/LibWeb/CSS/CSSKeyframeRule.cpp
Ali Mohammad Pur e90752cc21 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>
2023-05-29 05:35:41 +02:00

30 lines
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/*
* Copyright (c) 2023, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "CSSKeyframeRule.h"
#include <LibWeb/CSS/CSSRuleList.h>
namespace Web::CSS {
void CSSKeyframeRule::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_declarations);
}
JS::ThrowCompletionOr<void> CSSKeyframeRule::initialize(JS::Realm&)
{
return {};
}
DeprecatedString CSSKeyframeRule::serialized() const
{
StringBuilder builder;
builder.appendff("{}% {{ {} }}", key().value(), style()->serialized());
return builder.to_deprecated_string();
}
}