ladybird/Userland/Libraries/LibWeb/SVG/SVGMaskElement.cpp

/*
 * Copyright (c) 2023, Andreas Kling <kling@serenityos.org>
 * Copyright (c) 2023, MacDue <macdue@dueutil.tech>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibWeb/Bindings/SVGMaskElementPrototype.h>
#include <LibWeb/DOM/Document.h>
#include <LibWeb/Layout/SVGGraphicsBox.h>
#include <LibWeb/SVG/AttributeNames.h>
#include <LibWeb/SVG/SVGMaskElement.h>

namespace Web::SVG {

SVGMaskElement::SVGMaskElement(DOM::Document& document, DOM::QualifiedName tag_name)
    : SVGGraphicsElement(document, move(tag_name))
{
}

SVGMaskElement::~SVGMaskElement() = default;

void SVGMaskElement::initialize(JS::Realm& realm)
{
    Base::initialize(realm);
    set_prototype(&Bindings::ensure_web_prototype<Bindings::SVGMaskElementPrototype>(realm, "SVGMaskElement"));
}

JS::GCPtr<Layout::Node> SVGMaskElement::create_layout_node(NonnullRefPtr<CSS::StyleProperties> style)
{
    return heap().allocate_without_realm<Layout::SVGGraphicsBox>(document(), *this, move(style));
}

void SVGMaskElement::attribute_changed(DeprecatedFlyString const& name, DeprecatedString const& value)
{
    SVGGraphicsElement::attribute_changed(name, value);
    if (name == AttributeNames::maskUnits) {
        m_mask_units = AttributeParser::parse_units(value);
    } else if (name == AttributeNames::maskContentUnits) {
        m_mask_content_units = AttributeParser::parse_units(value);
    }
}

MaskContentUnits SVGMaskElement::mask_content_units() const
{
    return m_mask_content_units.value_or(MaskContentUnits::UserSpaceOnUse);
}

MaskUnits SVGMaskElement::mask_units() const
{
    return m_mask_units.value_or(MaskUnits::ObjectBoundingBox);
}

CSSPixelRect SVGMaskElement::resolve_masking_area(CSSPixelRect const& mask_target) const
{
    if (mask_units() == SVG::MaskUnits::UserSpaceOnUse) {
        dbgln("SVG: maskUnits=userSpaceOnUse is not supported");
        return {};
    }
    // TODO: Resolve this based on the x, y, width, and height of the mask.
    return mask_target.inflated(mask_target.size().scaled(CSSPixels(2) / 10));
}

}