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LibWeb: Bring CSS line-height
closer to other engines
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.
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385 changed files with 6889 additions and 6893 deletions
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@ -1,17 +1,17 @@
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Viewport <#document> at (0,0) content-size 800x600 children: not-inline
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BlockContainer <html> at (0,0) content-size 800x600 [BFC] children: not-inline
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BlockContainer <body> at (8,8) content-size 784x21.84375 children: inline
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line 0 width: 300, height: 21.84375, bottom: 21.84375, baseline: 16.921875
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frag 0 from BlockContainer start: 0, length: 0, rect: [8,12 300x12]
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BlockContainer <progress#a> at (8,12) content-size 300x12 inline-block [BFC] children: not-inline
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BlockContainer <div> at (9,13) content-size 298x12 children: not-inline
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BlockContainer <div> at (9,13) content-size 298x12 children: not-inline
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BlockContainer <body> at (8,8) content-size 784x22 children: inline
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line 0 width: 300, height: 22, bottom: 22, baseline: 17
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frag 0 from BlockContainer start: 0, length: 0, rect: [8,13 300x12]
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BlockContainer <progress#a> at (8,13) content-size 300x12 inline-block [BFC] children: not-inline
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BlockContainer <div> at (9,14) content-size 298x12 children: not-inline
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BlockContainer <div> at (9,14) content-size 298x12 children: not-inline
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TextNode <#text>
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TextNode <#text>
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ViewportPaintable (Viewport<#document>) [0,0 800x600]
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PaintableWithLines (BlockContainer<HTML>) [0,0 800x600]
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PaintableWithLines (BlockContainer<BODY>) [8,8 784x21.84375]
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PaintableWithLines (BlockContainer<PROGRESS>#a) [8,12 300x12] overflow: [8,12 300x14]
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PaintableWithLines (BlockContainer<DIV>) [8,12 300x14]
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PaintableWithLines (BlockContainer<DIV>) [9,13 298x12]
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PaintableWithLines (BlockContainer<BODY>) [8,8 784x22]
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PaintableWithLines (BlockContainer<PROGRESS>#a) [8,13 300x12] overflow: [8,13 300x14]
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PaintableWithLines (BlockContainer<DIV>) [8,13 300x14]
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PaintableWithLines (BlockContainer<DIV>) [9,14 298x12]
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