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LibWeb: Layout SVG <text> elements during layout (not while painting)
Previously, all SVG <text> elements were zero-sized boxes, that were only actually positioned and sized during painting. This led to a number of problems, the most visible of which being that text could not be scaled based on the viewBox. Which this patch, <text> elements get a correctly sized layout box, that can be hit-tested and respects the SVG viewBox. To share code with SVGGeometryElement's the PathData (from the prior commit) has been split into a computed path and computed transforms. The computed path is specific to geometry elements, but the computed transforms are shared between all SVG graphics elements.
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@ -4,11 +4,11 @@ Viewport <#document> at (0,0) content-size 800x600 children: not-inline
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line 0 width: 300, height: 150, bottom: 150, baseline: 150
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frag 0 from SVGSVGBox start: 0, length: 0, rect: [8,8 300x150]
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SVGSVGBox <svg> at (8,8) content-size 300x150 [SVG] children: not-inline
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SVGTextBox <text> at (8,8) content-size 0x0 children: not-inline
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SVGTextBox <text> at (8,-8) content-size 0x16 children: not-inline
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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 784x150]
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SVGSVGPaintable (SVGSVGBox<svg>) [8,8 300x150]
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SVGTextPaintable (SVGTextBox<text>) [8,8 0x0]
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SVGSVGPaintable (SVGSVGBox<svg>) [8,8 300x150] overflow: [8,-8 300x166]
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SVGTextPaintable (SVGTextBox<text>) [8,-8 0x16]
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