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LibWeb: Resolve grid item vertical margin/padding against CB width

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Percentage vertical margin and padding values are relative to the
containing block *width*, not *height*. This has to be one of the most
commonly recurring mistakes we make :^)
This commit is contained in:
Andreas Kling 2024-01-06 18:35:31 +01:00 • committed by Alexander Kalenik
parent a84778f6ee
commit cc88a2657d
3 changed files with 37 additions and 8 deletions
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13
Tests/LibWeb/Layout/expected/grid/grid-item-vertical-padding-and-margin-percentages.txt Normal file
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Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x466 [BFC] children: not-inline
Box <body> at (8,8) content-size 500x450 [GFC] children: not-inline
BlockContainer <div.a> at (8,183) content-size 500x0 [BFC] children: not-inline
BlockContainer <div.b> at (8,183) content-size 500x0 [BFC] children: not-inline
BlockContainer <(anonymous)> (not painted) [BFC] children: inline
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x466]
PaintableBox (Box<BODY>) [8,8 500x450]
PaintableWithLines (BlockContainer<DIV>.a) [8,58 500x125]
PaintableWithLines (BlockContainer<DIV>.b) [8,183 500x175]

19
Tests/LibWeb/Layout/input/grid/grid-item-vertical-padding-and-margin-percentages.html Normal file
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<!doctype html><style>
* {
outline: 1px solid black;
}
body {
display: grid;
width: 500px;
}
div.a {
padding-top: 25%;
margin-top: 10%;
background: pink;
}
div.b {
padding-bottom: 35%;
margin-bottom: 20%;
background: orange;
}
</style><body><div class="a"></div><div class="b"></div>