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LibWeb: Stretch-fit flex items with aspect ratio but no fixed sizes

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This solves a particular issue with SVG as flex items, where the SVG has
an intrinsic aspect ratio via its viewBox, but no explicit natural width
or height.

Makes all corporate sponsor logos show up on https://ziglang.org/ :^)
This commit is contained in:
Andreas Kling
2024-02-25 12:56:01 +01:00
parent 92a7fd77f4
commit a61f09a010
5 changed files with 43 additions and 15 deletions
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15
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.cpp
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@@ -628,8 +628,13 @@ void FlexFormattingContext::determine_flex_base_size_and_hypothetical_main_size(
}();
// AD-HOC: This is not mentioned in the spec, but if the item has an aspect ratio,
// we may need to adjust the main size in response to cross size min/max constraints.
// we may need to adjust the main size in these ways:
// - using stretch-fit main size if the flex basis is indefinite.
// - in response to cross size min/max constraints.
if (item.box->has_preferred_aspect_ratio()) {
if (!item.used_flex_basis_is_definite) {
item.flex_base_size = inner_main_size(m_flex_container_state);
}
item.flex_base_size = adjust_main_size_through_aspect_ratio_for_cross_size_min_max_constraints(child_box, item.flex_base_size, computed_cross_min_size(child_box), computed_cross_max_size(child_box));
}
@@ -1038,8 +1043,12 @@ void FlexFormattingContext::determine_hypothetical_cross_size_of_item(FlexItem&
return;
}
if (item.box->has_preferred_aspect_ratio() && item.main_size.has_value()) {
item.hypothetical_cross_size = calculate_cross_size_from_main_size_and_aspect_ratio(item.main_size.value(), item.box->preferred_aspect_ratio().value());
if (item.box->has_preferred_aspect_ratio()) {
if (item.used_flex_basis_is_definite) {
item.hypothetical_cross_size = calculate_cross_size_from_main_size_and_aspect_ratio(item.main_size.value(), item.box->preferred_aspect_ratio().value());
return;
}
item.hypothetical_cross_size = inner_cross_size(m_flex_container_state);
return;
}