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LibWeb: Bring CSS line-height closer to other engines

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This patch makes a few changes to the way we calculate line-height:

- `line-height: normal` is now resolved using metrics from the used
  font (specifically, round(A + D + lineGap)).

- `line-height: calc(...)` is now resolved at style compute time.

- `line-height` values are now absolutized at style compute time.

As a consequence of the above, we no longer need to walk the DOM
ancestor chain looking for line-heights during style computation.
Instead, values are inherited, resolved and absolutized locally.

This is not only much faster, but also makes our line-height metrics
match those of other engines like Gecko and Blink.
This commit is contained in:
Andreas Kling 2024-01-12 12:39:40 +01:00
parent f0722671c3
commit e7de5cb4d2
385 changed files with 6889 additions and 6893 deletions
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60
Tests/LibWeb/Layout/expected/table/auto-height.txt
View file

@ -1,40 +1,40 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (1,1) content-size 798x60.9375 [BFC] children: not-inline
BlockContainer <body> at (10,10) content-size 780x42.9375 children: not-inline
BlockContainer <div> at (11,11) content-size 778x19.46875 children: not-inline
TableWrapper <(anonymous)> at (11,11) content-size 29.15625x19.46875 [BFC] children: not-inline
Box <(anonymous)> at (11,11) content-size 29.15625x19.46875 table-box [TFC] children: not-inline
Box <(anonymous)> at (11,11) content-size 29.15625x19.46875 table-row children: not-inline
BlockContainer <span> at (12,12) content-size 27.15625x17.46875 table-cell [BFC] children: inline
line 0 width: 27.15625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 3, rect: [12,12 27.15625x17.46875]
BlockContainer <html> at (1,1) content-size 798x60 [BFC] children: not-inline
BlockContainer <body> at (10,10) content-size 780x42 children: not-inline
BlockContainer <div> at (11,11) content-size 778x19 children: not-inline
TableWrapper <(anonymous)> at (11,11) content-size 29.15625x19 [BFC] children: not-inline
Box <(anonymous)> at (11,11) content-size 29.15625x19 table-box [TFC] children: not-inline
Box <(anonymous)> at (11,11) content-size 29.15625x19 table-row children: not-inline
BlockContainer <span> at (12,12) content-size 27.15625x17 table-cell [BFC] children: inline
line 0 width: 27.15625, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 0, length: 3, rect: [12,12 27.15625x17]
"foo"
TextNode <#text>
BlockContainer <div> at (11,32.46875) content-size 778x19.46875 children: not-inline
TableWrapper <(anonymous)> at (11,32.46875) content-size 29.640625x19.46875 [BFC] children: not-inline
Box <(anonymous)> at (11,32.46875) content-size 29.640625x19.46875 table-box [TFC] children: not-inline
Box <(anonymous)> at (11,32.46875) content-size 29.640625x19.46875 table-row children: not-inline
BlockContainer <span> at (12,33.46875) content-size 27.640625x17.46875 table-cell [BFC] children: inline
line 0 width: 27.640625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 3, rect: [12,33.46875 27.640625x17.46875]
BlockContainer <div> at (11,32) content-size 778x19 children: not-inline
TableWrapper <(anonymous)> at (11,32) content-size 29.640625x19 [BFC] children: not-inline
Box <(anonymous)> at (11,32) content-size 29.640625x19 table-box [TFC] children: not-inline
Box <(anonymous)> at (11,32) content-size 29.640625x19 table-row children: not-inline
BlockContainer <span> at (12,33) content-size 27.640625x17 table-cell [BFC] children: inline
line 0 width: 27.640625, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 0, length: 3, rect: [12,33 27.640625x17]
"bar"
TextNode <#text>
BlockContainer <(anonymous)> at (10,52.9375) content-size 780x0 children: inline
BlockContainer <(anonymous)> at (10,52) content-size 780x0 children: inline
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x62.9375]
PaintableWithLines (BlockContainer<BODY>) [9,9 782x44.9375]
PaintableWithLines (BlockContainer<DIV>) [10,10 780x21.46875]
PaintableWithLines (TableWrapper(anonymous)) [11,11 29.15625x19.46875]
PaintableBox (Box(anonymous)) [11,11 29.15625x19.46875]
PaintableBox (Box(anonymous)) [11,11 29.15625x19.46875]
PaintableWithLines (BlockContainer<SPAN>) [11,11 29.15625x19.46875]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x62]
PaintableWithLines (BlockContainer<BODY>) [9,9 782x44]
PaintableWithLines (BlockContainer<DIV>) [10,10 780x21]
PaintableWithLines (TableWrapper(anonymous)) [11,11 29.15625x19]
PaintableBox (Box(anonymous)) [11,11 29.15625x19]
PaintableBox (Box(anonymous)) [11,11 29.15625x19]
PaintableWithLines (BlockContainer<SPAN>) [11,11 29.15625x19]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<DIV>) [10,31.46875 780x21.46875]
PaintableWithLines (TableWrapper(anonymous)) [11,32.46875 29.640625x19.46875]
PaintableBox (Box(anonymous)) [11,32.46875 29.640625x19.46875]
PaintableBox (Box(anonymous)) [11,32.46875 29.640625x19.46875]
PaintableWithLines (BlockContainer<SPAN>) [11,32.46875 29.640625x19.46875]
PaintableWithLines (BlockContainer<DIV>) [10,31 780x21]
PaintableWithLines (TableWrapper(anonymous)) [11,32 29.640625x19]
PaintableBox (Box(anonymous)) [11,32 29.640625x19]
PaintableBox (Box(anonymous)) [11,32 29.640625x19]
PaintableWithLines (BlockContainer<SPAN>) [11,32 29.640625x19]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer(anonymous)) [10,52.9375 780x0]
PaintableWithLines (BlockContainer(anonymous)) [10,52 780x0]