ladybird/Userland/Libraries/LibWeb/Painting/SVGMaskPaintable.h
MacDue 163b6bb401 LibWeb: Special case SVG masks during layout
Rather than try to lay out masks normally, this updates the TreeBuilder
to create layout nodes for masks as a child of their user (i.e. the
masked element). This allows each use of a mask to be laid out
differently, which makes supporting `maskContentUnits=objectBoundingBox`
fairly easy.

The `SVGFormattingContext` is then updated to lay out masks last (as
their sizing may depend on their parent), and treats them like
viewports.

This is pretty ad-hoc, but the SVG specification does not give any
guidance on how to actually implement this.
2024-03-12 08:51:50 +01:00

31 lines
679 B
C++

/*
* Copyright (c) 2024, MacDue <macdue@dueutil.tech>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/Layout/SVGMaskBox.h>
#include <LibWeb/Painting/SVGGraphicsPaintable.h>
namespace Web::Painting {
class SVGMaskPaintable : public SVGGraphicsPaintable {
JS_CELL(SVGMaskPaintable, SVGGraphicsPaintable);
public:
static JS::NonnullGCPtr<SVGMaskPaintable> create(Layout::SVGMaskBox const&);
bool forms_unconnected_subtree() const override
{
// Masks should not be painted (i.e. reachable) unless referenced by another element.
return true;
}
protected:
SVGMaskPaintable(Layout::SVGMaskBox const&);
};
}