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LibWeb: Account for negative margins when calculating float intrusion

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If a box has a negative margin-left, it may have a negative effective
offset within its parent BFC root coordinate system.

We can account for this when calculating the amount of left-side float
intrusion by flooring the X offset at 0.
This commit is contained in:
Andreas Kling 2023-06-04 12:55:55 +02:00
parent 0e5ec8c0ab
commit 89ba00304c
4 changed files with 28 additions and 2 deletions
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11
Tests/LibWeb/Layout/expected/block-and-inline/block-with-negative-margin-and-no-intruding-floats.txt Normal file
View file

@ -0,0 +1,11 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (1,1) content-size 798x55.40625 [BFC] children: not-inline
BlockContainer <body> at (110,10) content-size 300x37.40625 positioned children: not-inline
BlockContainer <div> at (61,11) content-size 200x35.40625 children: inline
line 0 width: 159.859375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 19, rect: [61,11 159.859375x17.46875]
"there are no floats"
line 1 width: 163.875, height: 17.9375, bottom: 35.40625, baseline: 13.53125
frag 0 from TextNode start: 20, length: 21, rect: [61,28 163.875x17.46875]
"intruding on this div"
TextNode <#text>