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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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@ -1,12 +1,12 @@
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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 800x17.46875 [BFC] children: inline
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line 0 width: 51.75, height: 17.46875, bottom: 17.46875, baseline: 13.53125
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frag 0 from TextNode start: 0, length: 7, rect: [0,0 51.75x17.46875]
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BlockContainer <html> at (0,0) content-size 800x17 [BFC] children: inline
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line 0 width: 51.75, height: 17, bottom: 17, baseline: 13.296875
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frag 0 from TextNode start: 0, length: 7, rect: [0,0 51.75x17]
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"whf :^)"
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InlineNode <span>
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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 800x17.46875]
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PaintableWithLines (BlockContainer<HTML>) [0,0 800x17]
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InlinePaintable (InlineNode<SPAN>)
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TextPaintable (TextNode<#text>)
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