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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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44
Tests/LibWeb/Layout/expected/table/width-distribution-of-max-width-increment.txt
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@ -1,33 +1,33 @@
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 784x21.46875 children: not-inline
TableWrapper <(anonymous)> at (8,8) content-size 784x21.46875 [BFC] children: not-inline
Box <table> at (8,8) content-size 784x21.46875 table-box [TFC] children: not-inline
BlockContainer <body> at (8,8) content-size 784x21 children: not-inline
TableWrapper <(anonymous)> at (8,8) content-size 784x21 [BFC] children: not-inline
Box <table> at (8,8) content-size 784x21 table-box [TFC] children: not-inline
BlockContainer <(anonymous)> (not painted) children: inline
TextNode <#text>
Box <tbody> at (8,8) content-size 784x21.46875 table-row-group children: not-inline
Box <tbody> at (8,8) content-size 784x21 table-row-group children: not-inline
BlockContainer <(anonymous)> (not painted) children: inline
TextNode <#text>
Box <tr> at (8,8) content-size 784x21.46875 table-row children: not-inline
Box <tr> at (8,8) content-size 784x21 table-row children: not-inline
BlockContainer <(anonymous)> (not painted) children: inline
TextNode <#text>
BlockContainer <td> at (10,10) content-size 216.09375x17.46875 table-cell [BFC] children: inline
line 0 width: 14.265625, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 1, length: 1, rect: [10,10 14.265625x17.46875]
BlockContainer <td> at (10,10) content-size 216.09375x17 table-cell [BFC] children: inline
line 0 width: 14.265625, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 1, length: 1, rect: [10,10 14.265625x17]
"A"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) children: inline
TextNode <#text>
BlockContainer <td> at (230.09375,10) content-size 156.796875x17.46875 table-cell [BFC] children: inline
line 0 width: 9.34375, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 1, length: 1, rect: [230.09375,10 9.34375x17.46875]
BlockContainer <td> at (230.09375,10) content-size 156.796875x17 table-cell [BFC] children: inline
line 0 width: 9.34375, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 1, length: 1, rect: [230.09375,10 9.34375x17]
"B"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) children: inline
TextNode <#text>
BlockContainer <td> at (390.890625,10) content-size 399.109375x17.46875 table-cell [BFC] children: inline
line 0 width: 29.453125, height: 17.46875, bottom: 17.46875, baseline: 13.53125
frag 0 from TextNode start: 1, length: 3, rect: [390.890625,10 29.453125x17.46875]
BlockContainer <td> at (390.890625,10) content-size 399.109375x17 table-cell [BFC] children: inline
line 0 width: 29.453125, height: 17, bottom: 17, baseline: 13.296875
frag 0 from TextNode start: 1, length: 3, rect: [390.890625,10 29.453125x17]
"C D"
TextNode <#text>
BlockContainer <(anonymous)> (not painted) children: inline
@ -39,14 +39,14 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
ViewportPaintable (Viewport<#document>) [0,0 800x600]
PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x21.46875]
PaintableWithLines (TableWrapper(anonymous)) [8,8 784x21.46875]
PaintableBox (Box<TABLE>) [8,8 784x21.46875]
PaintableBox (Box<TBODY>) [8,8 784x21.46875]
PaintableBox (Box<TR>) [8,8 784x21.46875]
PaintableWithLines (BlockContainer<TD>) [8,8 220.09375x21.46875]
PaintableWithLines (BlockContainer<BODY>) [8,8 784x21]
PaintableWithLines (TableWrapper(anonymous)) [8,8 784x21]
PaintableBox (Box<TABLE>) [8,8 784x21]
PaintableBox (Box<TBODY>) [8,8 784x21]
PaintableBox (Box<TR>) [8,8 784x21]
PaintableWithLines (BlockContainer<TD>) [8,8 220.09375x21]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<TD>) [228.09375,8 160.796875x21.46875]
PaintableWithLines (BlockContainer<TD>) [228.09375,8 160.796875x21]
TextPaintable (TextNode<#text>)
PaintableWithLines (BlockContainer<TD>) [388.890625,8 403.109375x21.46875]
PaintableWithLines (BlockContainer<TD>) [388.890625,8 403.109375x21]
TextPaintable (TextNode<#text>)