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LibWeb: Allow absolute boxes to have a % height of a % height parent

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Previously absolutely positioned boxes could only have a % height if
their parent had a absolute height (a height in pixels, em, etc).

This broke some websites/demos such as the "Francine CSS oil painting",
which starts to appear after this commit.

Francine: https://diana-adrianne.com/purecss-francine/
This commit is contained in:
MacDue 2022-08-07 17:00:38 +01:00 • committed by Andreas Kling
parent 5049a56d96
commit 0e8dafcbb8
Notes: sideshowbarker 2024-07-17 08:22:52 +09:00
1 changed files with 1 additions and 6 deletions
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7
Userland/Libraries/LibWeb/Layout/FormattingContext.cpp
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@ -658,7 +658,6 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
// FIXME: The section below is partly on-spec, partly ad-hoc.
auto& computed_values = box.computed_values();
auto const& containing_block = *box.containing_block();
auto width_of_containing_block = containing_block_width_for(box);
auto height_of_containing_block = containing_block_height_for(box);
@ -675,12 +674,8 @@ void FormattingContext::compute_height_for_absolutely_positioned_non_replaced_el
auto used_bottom = computed_bottom.resolved(box, height_of_containing_block_as_length).resolved(box).to_px(box);
auto tentative_height = CSS::Length::make_auto();
if (computed_values.height().is_percentage()
&& !(containing_block.computed_values().height().is_length() && containing_block.computed_values().height().length().is_absolute())) {
// tentative_height is already auto
} else {
if (!computed_height.is_auto())
tentative_height = computed_values.height().resolved(box, height_of_containing_block_as_length).resolved(box);
}
auto& box_state = m_state.get_mutable(box);
box_state.margin_top = computed_values.margin().top.resolved(box, width_of_containing_block_as_length).to_px(box);