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LibWeb: Sketch out a very basic SVG <clipPath> element
This element doesn't actually support anything at the moment, but it still massively speeds up painting performance on Wikipedia! :^) How? Because we no longer paint SVG <path> elements found inside <clipPath> elements. SVGClipPathElement::create_layout_node() returns nullptr which stops the layout tree builder from recursing further into the subtree, and so the <path> element never gets a layout or paint box. Mousing over Wikipedia now barely break 50% CPU usage on my machine :^)
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@ -317,6 +317,8 @@ set(SOURCES
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SVG/AttributeNames.cpp
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SVG/AttributeParser.cpp
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SVG/SVGAnimatedLength.cpp
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SVG/SVGClipPathElement.cpp
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SVG/SVGElement.cpp
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SVG/SVGElement.cpp
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SVG/SVGGElement.cpp
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SVG/SVGGeometryElement.cpp
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@ -581,6 +583,7 @@ libweb_js_wrapper(NavigationTiming/PerformanceTiming)
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libweb_js_wrapper(RequestIdleCallback/IdleDeadline)
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libweb_js_wrapper(ResizeObserver/ResizeObserver)
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libweb_js_wrapper(SVG/SVGAnimatedLength)
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libweb_js_wrapper(SVG/SVGClipPathElement)
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libweb_js_wrapper(SVG/SVGElement)
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libweb_js_wrapper(SVG/SVGGeometryElement)
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libweb_js_wrapper(SVG/SVGGraphicsElement)
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