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LibWeb/Animation: Fall back to discrete animation in more cases

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Use discrete animation when the number of components or the types
of corresponding components do not match. This commit does not cover
all cases, but adds FIXME comments in the appropriate places.
This commit is contained in:
Glenn Skrzypczak 2024-11-25 13:51:19 +01:00 • committed by Andreas Kling
commit 0d15cc4672
Notes: github-actions[bot] 2024-11-25 17:11:25 +00:00
3 changed files with 470 additions and 8 deletions
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26
Libraries/LibWeb/CSS/Interpolation.cpp
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@ -572,8 +572,9 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CSSS
case CSSStyleValue::Type::Integer:
return IntegerStyleValue::create(interpolate_raw(from.as_integer().integer(), to.as_integer().integer(), delta));
case CSSStyleValue::Type::Length: {
auto& from_length = from.as_length().length();
auto& to_length = to.as_length().length();
// FIXME: Absolutize values
auto const& from_length = from.as_length().length();
auto const& to_length = to.as_length().length();
return LengthStyleValue::create(Length(interpolate_raw(from_length.raw_value(), to_length.raw_value(), delta), from_length.type()));
}
case CSSStyleValue::Type::Number:
@ -583,8 +584,8 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CSSS
case CSSStyleValue::Type::Position: {
// https://www.w3.org/TR/css-values-4/#combine-positions
// FIXME: Interpolation of <position> is defined as the independent interpolation of each component (x, y) normalized as an offset from the top left corner as a <length-percentage>.
auto& from_position = from.as_position();
auto& to_position = to.as_position();
auto const& from_position = from.as_position();
auto const& to_position = to.as_position();
return PositionStyleValue::create(
interpolate_value(element, from_position.edge_x(), to_position.edge_x(), delta)->as_edge(),
interpolate_value(element, from_position.edge_y(), to_position.edge_y(), delta)->as_edge());
@ -606,6 +607,12 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CSSS
case CSSStyleValue::Type::Rect: {
auto from_rect = from.as_rect().rect();
auto to_rect = to.as_rect().rect();
if (from_rect.top_edge.is_auto() != to_rect.top_edge.is_auto() || from_rect.right_edge.is_auto() != to_rect.right_edge.is_auto() || from_rect.bottom_edge.is_auto() != to_rect.bottom_edge.is_auto() || from_rect.left_edge.is_auto() != to_rect.left_edge.is_auto()) {
return delta >= 0.5f ? to : from;
}
// FIXME: Absolutize values
return RectStyleValue::create({
Length(interpolate_raw(from_rect.top_edge.raw_value(), to_rect.top_edge.raw_value(), delta), from_rect.top_edge.type()),
Length(interpolate_raw(from_rect.right_edge.raw_value(), to_rect.right_edge.raw_value(), delta), from_rect.right_edge.type()),
@ -616,11 +623,14 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CSSS
case CSSStyleValue::Type::Transformation:
VERIFY_NOT_REACHED();
case CSSStyleValue::Type::ValueList: {
auto& from_list = from.as_value_list();
auto& to_list = to.as_value_list();
auto const& from_list = from.as_value_list();
auto const& to_list = to.as_value_list();
if (from_list.size() != to_list.size())
return from;
return delta >= 0.5f ? to : from;
// FIXME: If the number of components or the types of corresponding components do not match,
// or if any component value uses discrete animation and the two corresponding values do not match,
// then the property values combine as discrete.
StyleValueVector interpolated_values;
interpolated_values.ensure_capacity(from_list.size());
for (size_t i = 0; i < from_list.size(); ++i)
@ -629,7 +639,7 @@ NonnullRefPtr<CSSStyleValue const> interpolate_value(DOM::Element& element, CSSS
return StyleValueList::create(move(interpolated_values), from_list.separator());
}
default:
return from;
return delta >= 0.5f ? to : from;
}
}