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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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32
Tests/LibWeb/Layout/expected/table/size.txt
View file

@ -1,28 +1,28 @@
Viewport <#document> at (0,0) content-size 800x600 children: not-inline
BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x17.46875 children: not-inline
TableWrapper <(anonymous)> at (350,8) content-size 100x17.46875 [BFC] children: not-inline
Box <div> at (350,8) content-size 100x17.46875 table-box [TFC] children: not-inline
Box <(anonymous)> at (350,8) content-size 100x17.46875 table-row children: not-inline
BlockContainer <(anonymous)> at (350,8) content-size 100x17.46875 table-cell [BFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x17 children: not-inline
TableWrapper <(anonymous)> at (350,8) content-size 100x17 [BFC] children: not-inline
Box <div> at (350,8) content-size 100x17 table-box [TFC] children: not-inline
Box <(anonymous)> at (350,8) content-size 100x17 table-row children: not-inline
BlockContainer <(anonymous)> at (350,8) content-size 100x17 table-cell [BFC] children: not-inline
BlockContainer <(anonymous)> at (350,8) content-size 100x0 children: inline
TextNode <#text>
BlockContainer <div> at (350,8) content-size 2000x17.46875 children: inline
line 0 width: 6.34375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 0, length: 1, rect: [350,8 6.34375x17.46875]
BlockContainer <div> at (350,8) content-size 2000x17 children: inline
line 0 width: 6.34375, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 0, length: 1, rect: [350,8 6.34375x17]
"1"
TextNode <#text>
BlockContainer <(anonymous)> at (350,25.46875) content-size 100x0 children: inline
BlockContainer <(anonymous)> at (350,25) content-size 100x0 children: inline
TextNode <#text>
ViewportPaintable (Viewport<#document>) [0,0 800x600] overflow: [0,0 2350x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x600] overflow: [0,0 2350x600]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x17.46875] overflow: [8,8 2342x17.46875]
PaintableWithLines (TableWrapper(anonymous)) [350,8 100x17.46875] overflow: [350,8 2000x17.46875]
PaintableBox (Box<DIV>) [350,8 100x17.46875] overflow: [350,8 2000x17.46875]
PaintableBox (Box(anonymous)) [350,8 100x17.46875] overflow: [350,8 2000x17.46875]
PaintableWithLines (BlockContainer(anonymous)) [350,8 100x17.46875] overflow: [350,8 2000x17.46875]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x17] overflow: [8,8 2342x17]
PaintableWithLines (TableWrapper(anonymous)) [350,8 100x17] overflow: [350,8 2000x17]
PaintableBox (Box<DIV>) [350,8 100x17] overflow: [350,8 2000x17]
PaintableBox (Box(anonymous)) [350,8 100x17] overflow: [350,8 2000x17]
PaintableWithLines (BlockContainer(anonymous)) [350,8 100x17] overflow: [350,8 2000x17]
PaintableWithLines (BlockContainer(anonymous)) [350,8 100x0]
PaintableWithLines (BlockContainer<DIV>) [350,8 2000x17.46875]
PaintableWithLines (BlockContainer<DIV>) [350,8 2000x17]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer(anonymous)) [350,25.46875 100x0]
PaintableWithLines (BlockContainer(anonymous)) [350,25 100x0]