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LibWeb: Fix wrong assumption that repeat() is always first track [GFC]
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Browse source 
Fixes crashing in
https://wpt.live/css/css-grid/grid-definition/grid-auto-fit-columns-001.html
This commit is contained in:
Aliaksandr Kalenik 2024-09-09 21:12:39 +02:00 committed by Alexander Kalenik
parent 26415d39f7
commit ee41dbfec3
Notes: github-actions[bot] 2024-09-09 20:06:22 +00:00 
Author: https://github.com/kalenikaliaksandr
Commit: https://github.com/LadybirdBrowser/ladybird/commit/ee41dbfec3c
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1348
4 changed files with 109 additions and 6 deletions
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78
Tests/LibWeb/Layout/expected/grid/fixed-tracks-followed-by-repeat-auto-fill.txt Normal file
View file

@ -0,0 +1,78 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x51 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x35 children: not-inline
Box <div.grid-container> at (8,8) content-size 784x35 [GFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (18,18) content-size 80x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [55,18 5.546875x15] baseline: 11.703125
"1"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (128,18) content-size 80x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [164,18 7.71875x15] baseline: 11.703125
"2"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (238,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [249,18 7.953125x15] baseline: 11.703125
"3"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (298,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [310,18 6.78125x15] baseline: 11.703125
"4"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (358,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [369,18 7.390625x15] baseline: 11.703125
"5"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (418,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [429,18 7.640625x15] baseline: 11.703125
"6"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (478,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [489,18 7.625x15] baseline: 11.703125
"7"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <div.grid-item> at (538,18) content-size 30x15 [BFC] children: inline
frag 0 from TextNode start: 0, length: 1, rect: [549,18 8.296875x15] baseline: 11.703125
"8"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
BlockContainer <(anonymous)> at (8,43) content-size 784x0 children: inline
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x51]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x35]
PaintableBox (Box<DIV>.grid-container) [8,8 784x35]
PaintableWithLines (BlockContainer<DIV>.grid-item) [8,8 100x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [118,8 100x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [228,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [288,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [348,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [408,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [468,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>.grid-item) [528,8 50x35]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer(anonymous)) [8,43 784x0]

26
Tests/LibWeb/Layout/input/grid/fixed-tracks-followed-by-repeat-auto-fill.html Normal file
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@ -0,0 +1,26 @@
<!DOCTYPE html>
<style>
.grid-container {
display: grid;
grid-template-columns: 100px 100px repeat(auto-fill, minmax(50px, 1fr));
grid-gap: 10px;
}
.grid-item {
background-color: #4caf50;
padding: 10px;
text-align: center;
color: white;
font-size: 14px;
}
</style>
<div class="grid-container">
<div class="grid-item">1</div>
<div class="grid-item">2</div>
<div class="grid-item">3</div>
<div class="grid-item">4</div>
<div class="grid-item">5</div>
<div class="grid-item">6</div>
<div class="grid-item">7</div>
<div class="grid-item">8</div>
</div>

9
Userland/Libraries/LibWeb/Layout/GridFormattingContext.cpp
View file

@ -88,7 +88,7 @@ CSSPixels GridFormattingContext::resolve_definite_track_size(CSS::GridSize const
return 0;
}
int GridFormattingContext::count_of_repeated_auto_fill_or_fit_tracks(GridDimension dimension)
int GridFormattingContext::count_of_repeated_auto_fill_or_fit_tracks(GridDimension dimension, CSS::ExplicitGridTrack const& repeated_track)
{
// https://www.w3.org/TR/css-grid-2/#auto-repeat
// 7.2.3.2. Repeat-to-fill: auto-fill and auto-fit repetitions
@ -102,12 +102,11 @@ int GridFormattingContext::count_of_repeated_auto_fill_or_fit_tracks(GridDimensi
// content box of its grid container
auto const& grid_computed_values = grid_container().computed_values();
auto const& track_list = dimension == GridDimension::Row ? grid_computed_values.grid_template_rows().track_list() : grid_computed_values.grid_template_columns().track_list();
CSSPixels size_of_repeated_tracks = 0;
// (treating each track as its max track sizing function if that is definite or its minimum track sizing
// function otherwise, flooring the max track sizing function by the min track sizing function if both
// are definite, and taking gap into account)
auto const& repeat_track_list = track_list.first().repeat().grid_track_size_list().track_list();
auto const& repeat_track_list = repeated_track.repeat().grid_track_size_list().track_list();
for (auto const& explicit_grid_track : repeat_track_list) {
auto const& track_sizing_function = explicit_grid_track;
CSSPixels track_size = 0;
@ -422,7 +421,7 @@ void GridFormattingContext::initialize_grid_tracks_from_definition(GridDimension
int repeat_count = 1;
if (track_definition.is_repeat()) {
if (track_definition.repeat().is_auto_fill() || track_definition.repeat().is_auto_fit())
repeat_count = count_of_repeated_auto_fill_or_fit_tracks(dimension);
repeat_count = count_of_repeated_auto_fill_or_fit_tracks(dimension, track_definition);
else
repeat_count = track_definition.repeat().repeat_count();
}
@ -2096,7 +2095,7 @@ void GridFormattingContext::init_grid_lines(GridDimension dimension)
} else if (explicit_track.is_repeat()) {
int repeat_count = 0;
if (explicit_track.repeat().is_auto_fill() || explicit_track.repeat().is_auto_fit())
repeat_count = count_of_repeated_auto_fill_or_fit_tracks(dimension);
repeat_count = count_of_repeated_auto_fill_or_fit_tracks(dimension, explicit_track);
else
repeat_count = explicit_track.repeat().repeat_count();
auto const& repeat_track = explicit_track.repeat();

2
Userland/Libraries/LibWeb/Layout/GridFormattingContext.h
View file

@ -248,7 +248,7 @@ private:
Optional<int> get_line_index_by_line_name(GridDimension dimension, String const&);
CSSPixels resolve_definite_track_size(CSS::GridSize const&, AvailableSpace const&);
int count_of_repeated_auto_fill_or_fit_tracks(GridDimension);
int count_of_repeated_auto_fill_or_fit_tracks(GridDimension, CSS::ExplicitGridTrack const& repeated_track);
void build_grid_areas();