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LibWeb: Flexbox: Check for relative resolvability on the cross axis

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If an element has a relative specified length on the cross axis, but in
the lineage there are no parents that have any fixed cross size, this
would have resulted in a 0 cross size.
We now catch that and check whether the relative length would result in
an actual definite length if resolved.
This commit is contained in:
Tobias Christiansen 2021-10-01 13:43:36 +02:00 committed by Andreas Kling
parent a3fe981daa
commit 33a9f908a6
Notes: sideshowbarker 2024-07-18 03:15:22 +09:00 
Author: https://github.com/TobyAsE
Commit: https://github.com/SerenityOS/serenity/commit/33a9f908a6b
Pull-request: https://github.com/SerenityOS/serenity/pull/10294
1 changed files with 17 additions and 2 deletions
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19
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.cpp
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@ -6,6 +6,7 @@
*/
#include "InlineFormattingContext.h"
#include <AK/Function.h>
#include <AK/StdLibExtras.h>
#include <LibWeb/Layout/BlockBox.h>
#include <LibWeb/Layout/BlockFormattingContext.h>
@ -109,8 +110,22 @@ void FlexFormattingContext::run(Box& box, LayoutMode)
auto has_definite_main_size = [&is_row](Box& box) {
return is_row ? box.has_definite_width() : box.has_definite_height();
};
auto has_definite_cross_size = [&is_row](Box& box) {
return is_row ? box.has_definite_height() : box.has_definite_width();
Function<bool(NodeWithStyle&)> cross_size_is_absolute_or_resolved_nicely = [&](NodeWithStyle& box) {
auto length = is_row ? box.computed_values().height() : box.computed_values().width();
if (length.is_absolute() || length.is_relative())
return true;
if (length.is_undefined_or_auto())
return false;
if (!box.parent())
return false;
if (length.is_percentage() && cross_size_is_absolute_or_resolved_nicely(*box.parent()))
return true;
return false;
};
auto has_definite_cross_size = [&is_row, &cross_size_is_absolute_or_resolved_nicely](Box& box) {
return (is_row ? box.has_definite_height() : box.has_definite_width()) && cross_size_is_absolute_or_resolved_nicely(box);
};
auto specified_main_size = [&is_row](Box& box) {
return is_row