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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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parent
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commit
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385 changed files with 6889 additions and 6893 deletions
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@ -1,11 +1,11 @@
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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 800x33.46875 [BFC] children: not-inline
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BlockContainer <body> at (8,8) content-size 0x17.46875 children: inline
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line 0 width: 0, height: 17.46875, bottom: 17.46875, baseline: 13.53125
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BlockContainer <html> at (0,0) content-size 800x33 [BFC] children: not-inline
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BlockContainer <body> at (8,8) content-size 0x17 children: inline
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line 0 width: 0, height: 17, bottom: 17, baseline: 13.296875
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frag 0 from SVGSVGBox start: 0, length: 0, rect: [8,21 0x0]
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SVGSVGBox <svg> at (8,21) content-size 0x0 [SVG] children: not-inline
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ViewportPaintable (Viewport<#document>) [0,0 800x600]
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PaintableWithLines (BlockContainer<HTML>) [0,0 800x33.46875]
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PaintableWithLines (BlockContainer<BODY>) [8,8 0x17.46875]
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PaintableWithLines (BlockContainer<HTML>) [0,0 800x33]
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PaintableWithLines (BlockContainer<BODY>) [8,8 0x17]
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SVGSVGPaintable (SVGSVGBox<svg>) [8,21 0x0]
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@ -1,9 +1,9 @@
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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 784x17.46875 children: inline
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line 0 width: 8, height: 17.46875, bottom: 17.46875, baseline: 13.53125
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BlockContainer <body> at (8,8) content-size 784x17 children: inline
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line 0 width: 8, height: 17, bottom: 17, baseline: 13.296875
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frag 0 from ImageBox start: 0, length: 0, rect: [8,21 0x0]
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frag 1 from TextNode start: 0, length: 1, rect: [8,8 8x17.46875]
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frag 1 from TextNode start: 0, length: 1, rect: [8,8 8x17]
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" "
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frag 2 from SVGSVGBox start: 0, length: 0, rect: [16,21 0x0]
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ImageBox <img> at (8,21) content-size 0x0 children: not-inline
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@ -22,7 +22,7 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
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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 784x17.46875]
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PaintableWithLines (BlockContainer<BODY>) [8,8 784x17]
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ImagePaintable (ImageBox<IMG>) [8,21 0x0]
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TextPaintable (TextNode<#text>)
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SVGSVGPaintable (SVGSVGBox<svg>) [16,21 0x0]
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