163b6bb401
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.
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
/*
|
|
* Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <LibWeb/SVG/AttributeParser.h>
|
|
#include <LibWeb/SVG/SVGGraphicsElement.h>
|
|
#include <LibWeb/SVG/SVGViewport.h>
|
|
|
|
namespace Web::SVG {
|
|
|
|
class SVGMaskElement final : public SVGGraphicsElement
|
|
, public SVGViewport {
|
|
|
|
WEB_PLATFORM_OBJECT(SVGMaskElement, SVGGraphicsElement);
|
|
JS_DECLARE_ALLOCATOR(SVGMaskElement);
|
|
|
|
public:
|
|
virtual ~SVGMaskElement() override;
|
|
|
|
virtual Optional<ViewBox> view_box() const override
|
|
{
|
|
// maskContentUnits = objectBoundingBox acts like the mask is sized to the bounding box
|
|
// of the target element, with a viewBox of "0 0 1 1".
|
|
if (mask_content_units() == MaskContentUnits::ObjectBoundingBox)
|
|
return ViewBox { 0, 0, 1, 1 };
|
|
return {};
|
|
}
|
|
|
|
virtual Optional<PreserveAspectRatio> preserve_aspect_ratio() const override
|
|
{
|
|
// preserveAspectRatio = none (allow mask to be scaled in both x and y to match target size)
|
|
return PreserveAspectRatio { PreserveAspectRatio::Align::None, {} };
|
|
}
|
|
|
|
virtual void attribute_changed(FlyString const& name, Optional<String> const& value) override;
|
|
|
|
virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;
|
|
|
|
CSSPixelRect resolve_masking_area(CSSPixelRect const& mask_target) const;
|
|
|
|
MaskContentUnits mask_content_units() const;
|
|
MaskUnits mask_units() const;
|
|
|
|
private:
|
|
SVGMaskElement(DOM::Document&, DOM::QualifiedName);
|
|
virtual void initialize(JS::Realm&) override;
|
|
|
|
Optional<MaskContentUnits> m_mask_content_units = {};
|
|
Optional<MaskUnits> m_mask_units = {};
|
|
};
|
|
|
|
}
|