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LibWeb: Obey CSS aspect-ratio property during layout

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Calculate a "preferred aspect ratio" based on the value of
`aspect-ratio` and the presence of a natural aspect ratio, and use that
in layout.

This is by no means complete or perfect, but we do now apply the given
aspect-ratio to things.

The spec is a bit vague, just saying to calculate sizes for
aspect-ratio'ed boxes the same as you would for replaced elements. My
naive solution here is to find everywhere we were checking for a
ReplacedBox, and then also accept a regular Box with a preferred aspect
ratio. This gets us pretty far. :^)

https://www.w3.org/TR/css-sizing-4/#aspect-ratio-minimum is not at all
implemented.
This commit is contained in:
Sam Atkins 2023-06-08 16:47:50 +01:00 • committed by Andreas Kling
parent 84e7216603
commit 1051624084
14 changed files with 131 additions and 55 deletions
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10
Userland/Libraries/LibWeb/Layout/InlineFormattingContext.cpp
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@ -110,14 +110,12 @@ void InlineFormattingContext::dimension_box_on_line(Box const& box, LayoutMode l
box_state.border_bottom = computed_values.border_bottom().width;
box_state.margin_bottom = computed_values.margin().bottom().to_px(box, width_of_containing_block);
if (is<ReplacedBox>(box)) {
auto& replaced = verify_cast<ReplacedBox>(box);
box_state.set_content_width(compute_width_for_replaced_element(replaced, *m_available_space));
box_state.set_content_height(compute_height_for_replaced_element(replaced, *m_available_space));
if (box_is_sized_as_replaced_element(box)) {
box_state.set_content_width(compute_width_for_replaced_element(box, *m_available_space));
box_state.set_content_height(compute_height_for_replaced_element(box, *m_available_space));
if (is<SVGSVGBox>(box))
(void)layout_inside(replaced, layout_mode, box_state.available_inner_space_or_constraints_from(*m_available_space));
(void)layout_inside(box, layout_mode, box_state.available_inner_space_or_constraints_from(*m_available_space));
return;
}