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LibWeb: Containing block always has definite width during abspos layout

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From CSS-SIZING-3:

"...the size of the containing block of an absolutely positioned element
is always definite with respect to that element."
This commit is contained in:
Andreas Kling 2022-07-17 19:38:06 +02:00
parent 71a707480c
commit 02c59fe8c9
1 changed files with 9 additions and 0 deletions
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9
Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
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@ -697,6 +697,15 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
void FormattingContext::layout_absolutely_positioned_element(Box const& box)
{
// https://drafts.csswg.org/css-sizing-3/#definite
// Additionally, the size of the containing block of an absolutely positioned element is always definite with respect to that element.
auto& containing_block_state = m_state.get_mutable(*box.containing_block());
auto containing_block_had_definite_width = containing_block_state.has_definite_width();
containing_block_state.set_has_definite_width(true);
auto containing_block_definite_width_guard = ScopeGuard([&] {
containing_block_state.set_has_definite_width(containing_block_had_definite_width);
});
auto width_of_containing_block = containing_block_width_for(box);
auto height_of_containing_block = containing_block_height_for(box);
auto width_of_containing_block_as_length = CSS::Length::make_px(width_of_containing_block);