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LibWeb: Fix a case of incorrect flex container max-content main size

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We were incorrectly returning a "specified size suggestion" for flex
items with a definite main size where that main size was also automatic.

This led to us incorrectly choosing 0 as the automatic minimum size for
that flex item, instead of its min-content size.
This commit is contained in:
Andreas Kling 2023-06-08 11:09:35 +02:00
parent cb912f0e1a
commit a5f8f8238f
3 changed files with 23 additions and 1 deletions
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8
Tests/LibWeb/Layout/expected/flex/automatic-minimum-size-with-explicit-flex-basis-and-flex-container-with-max-content-main-size.txt Normal file
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@ -0,0 +1,8 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (1,1) content-size 798x68 [BFC] children: not-inline
Box <body.flex> at (10,10) content-size 38.84375x50 flex-container(row) [FFC] children: not-inline
BlockContainer <div.item> at (11,11) content-size 36.84375x48 flex-item [BFC] children: inline
line 0 width: 36.84375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 5, rect: [11,11 36.84375x17.46875]
"hello"
TextNode <#text>

14
Tests/LibWeb/Layout/input/flex/automatic-minimum-size-with-explicit-flex-basis-and-flex-container-with-max-content-main-size.html Normal file
View file

@ -0,0 +1,14 @@
<!doctype html><style>
* { border: 1px solid black; }
html { background: white; }
.flex {
width: max-content;
display: flex;
background: pink;
height: 50px;
}
.item {
flex-basis: 1px;
background: orange;
}
</style><body class="flex"><div class="item">hello

2
Userland/Libraries/LibWeb/Layout/FlexFormattingContext.cpp
View file

@ -750,7 +750,7 @@ Optional<CSSPixels> FlexFormattingContext::specified_size_suggestion(FlexItem co
{
// If the item’s preferred main size is definite and not automatic,
// then the specified size suggestion is that size. It is otherwise undefined.
if (has_definite_main_size(item.box)) {
if (has_definite_main_size(item.box) && !should_treat_main_size_as_auto(item.box)) {
// NOTE: We use get_pixel_{width,height} to ensure that CSS box-sizing is respected.
return is_row_layout() ? get_pixel_width(item.box, computed_main_size(item.box)) : get_pixel_height(item.box, computed_main_size(item.box));
}