Source/WebCore/svg/SVGMarkerElement.h

/*
 * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
 * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
 * Copyright (C) 2018-2019 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#pragma once

#include "SVGElement.h"
#include "SVGFitToViewBox.h"
#include "SVGMarkerTypes.h"

namespace WebCore {

class SVGMarkerElement final : public SVGElement, public SVGFitToViewBox {
    WTF_MAKE_ISO_ALLOCATED(SVGMarkerElement);
public:
    // Forward declare enumerations in the W3C naming scheme, for IDL generation.
    enum {
        SVG_MARKERUNITS_UNKNOWN = SVGMarkerUnitsUnknown,
        SVG_MARKERUNITS_USERSPACEONUSE = SVGMarkerUnitsUserSpaceOnUse,
        SVG_MARKERUNITS_STROKEWIDTH = SVGMarkerUnitsStrokeWidth
    };

    enum {
        SVG_MARKER_ORIENT_UNKNOWN = SVGMarkerOrientUnknown,
        SVG_MARKER_ORIENT_AUTO = SVGMarkerOrientAuto,
        SVG_MARKER_ORIENT_ANGLE = SVGMarkerOrientAngle,
        SVG_MARKER_ORIENT_AUTOSTARTREVERSE = SVGMarkerOrientAutoStartReverse
    };

    static Ref<SVGMarkerElement> create(const QualifiedName&, Document&);

    AffineTransform viewBoxToViewTransform(float viewWidth, float viewHeight) const;

    void setOrientToAuto();
    void setOrientToAngle(SVGAngle&);

    const SVGLengthValue& refX() const { return m_refX->currentValue(); }
    const SVGLengthValue& refY() const { return m_refY->currentValue(); }
    const SVGLengthValue& markerWidth() const { return m_markerWidth->currentValue(); }
    const SVGLengthValue& markerHeight() const { return m_markerHeight->currentValue(); }
    SVGMarkerUnitsType markerUnits() const { return m_markerUnits->currentValue<SVGMarkerUnitsType>(); }
    const SVGAngleValue& orientAngle() const { return m_orientAngle->currentValue(); }
    SVGMarkerOrientType orientType() const { return m_orientType->currentValue<SVGMarkerOrientType>(); }

    SVGAnimatedLength& refXAnimated() { return m_refX; }
    SVGAnimatedLength& refYAnimated() { return m_refY; }
    SVGAnimatedLength& markerWidthAnimated() { return m_markerWidth; }
    SVGAnimatedLength& markerHeightAnimated() { return m_markerHeight; }
    SVGAnimatedEnumeration& markerUnitsAnimated() { return m_markerUnits; }
    SVGAnimatedAngle& orientAngleAnimated() { return m_orientAngle; }
    Ref<SVGAnimatedEnumeration> orientTypeAnimated() { return m_orientType.copyRef(); }

private:
    SVGMarkerElement(const QualifiedName&, Document&);

    using PropertyRegistry = SVGPropertyOwnerRegistry<SVGMarkerElement, SVGElement, SVGFitToViewBox>;
    const SVGPropertyRegistry& propertyRegistry() const final { return m_propertyRegistry; }

    void parseAttribute(const QualifiedName&, const AtomString&) override;
    void svgAttributeChanged(const QualifiedName&) override;
    void childrenChanged(const ChildChange&) override;

    RenderPtr<RenderElement> createElementRenderer(RenderStyle&&, const RenderTreePosition&) override;
    bool rendererIsNeeded(const RenderStyle&) override { return true; }

    bool needsPendingResourceHandling() const override { return false; }

    bool selfHasRelativeLengths() const override;

    void setOrient(SVGMarkerOrientType, const SVGAngleValue&);

    PropertyRegistry m_propertyRegistry { *this };
    Ref<SVGAnimatedLength> m_refX { SVGAnimatedLength::create(this, SVGLengthMode::Width) };
    Ref<SVGAnimatedLength> m_refY { SVGAnimatedLength::create(this, SVGLengthMode::Height) };
    Ref<SVGAnimatedLength> m_markerWidth { SVGAnimatedLength::create(this, SVGLengthMode::Width, "3") };
    Ref<SVGAnimatedLength> m_markerHeight { SVGAnimatedLength::create(this, SVGLengthMode::Height, "3") };
    Ref<SVGAnimatedEnumeration> m_markerUnits { SVGAnimatedEnumeration::create(this, SVGMarkerUnitsStrokeWidth) };
    Ref<SVGAnimatedAngle> m_orientAngle { SVGAnimatedAngle::create(this) };
    Ref<SVGAnimatedOrientType> m_orientType { SVGAnimatedOrientType::create(this, SVGMarkerOrientAngle) };
};

} // namespace WebCore