Source/WebCore/svg/SVGTextPathElement.h

/*
 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
 *
 * 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.
 */

#ifndef SVGTextPathElement_h
#define SVGTextPathElement_h

#if ENABLE(SVG)
#include "SVGTextContentElement.h"

#include "SVGURIReference.h"

namespace WebCore {

enum SVGTextPathMethodType {
    SVG_TEXTPATH_METHODTYPE_UNKNOWN = 0,
    SVG_TEXTPATH_METHODTYPE_ALIGN = 1,
    SVG_TEXTPATH_METHODTYPE_STRETCH = 2
};

enum SVGTextPathSpacingType {
    SVG_TEXTPATH_SPACINGTYPE_UNKNOWN = 0,
    SVG_TEXTPATH_SPACINGTYPE_AUTO = 1,
    SVG_TEXTPATH_SPACINGTYPE_EXACT = 2
};

class SVGTextPathElement : public SVGTextContentElement,
                           public SVGURIReference {
public:
    // Forward declare these enums in the w3c naming scheme, for IDL generation
    enum {
        TEXTPATH_METHODTYPE_UNKNOWN = SVG_TEXTPATH_METHODTYPE_UNKNOWN,
        TEXTPATH_METHODTYPE_ALIGN = SVG_TEXTPATH_METHODTYPE_ALIGN,
        TEXTPATH_METHODTYPE_STRETCH = SVG_TEXTPATH_METHODTYPE_STRETCH,
        TEXTPATH_SPACINGTYPE_UNKNOWN = SVG_TEXTPATH_SPACINGTYPE_UNKNOWN,
        TEXTPATH_SPACINGTYPE_AUTO = SVG_TEXTPATH_SPACINGTYPE_AUTO,
        TEXTPATH_SPACINGTYPE_EXACT = SVG_TEXTPATH_SPACINGTYPE_EXACT
    };

    static PassRefPtr<SVGTextPathElement> create(const QualifiedName&, Document*);
 
private:
    SVGTextPathElement(const QualifiedName&, Document*);

    virtual void insertedIntoDocument();

    bool isSupportedAttribute(const QualifiedName&);
    virtual void parseMappedAttribute(Attribute*);
    virtual void svgAttributeChanged(const QualifiedName&);
    virtual void synchronizeProperty(const QualifiedName&);
    virtual void fillAttributeToPropertyTypeMap();
    virtual AttributeToPropertyTypeMap& attributeToPropertyTypeMap();

    virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
    virtual bool childShouldCreateRenderer(Node*) const;
    virtual bool rendererIsNeeded(const NodeRenderingContext&);

    virtual bool selfHasRelativeLengths() const;

    // Animated property declarations
    DECLARE_ANIMATED_LENGTH(StartOffset, startOffset)
    DECLARE_ANIMATED_ENUMERATION(Method, method, SVGTextPathMethodType)
    DECLARE_ANIMATED_ENUMERATION(Spacing, spacing, SVGTextPathSpacingType)

    // SVGURIReference
    DECLARE_ANIMATED_STRING(Href, href)
};

template<>
struct SVGPropertyTraits<SVGTextPathMethodType> {
    static SVGTextPathMethodType highestEnumValue() { return SVG_TEXTPATH_METHODTYPE_STRETCH; }

    static String toString(SVGTextPathMethodType type)
    {
        switch (type) {
        case SVG_TEXTPATH_METHODTYPE_UNKNOWN:
            return emptyString();
        case SVG_TEXTPATH_METHODTYPE_ALIGN:
            return "align";
        case SVG_TEXTPATH_METHODTYPE_STRETCH:
            return "stretch";
        }
    
        ASSERT_NOT_REACHED();
        return emptyString();
    }

    static SVGTextPathMethodType fromString(const String& value)
    {
        if (value == "align")
            return SVG_TEXTPATH_METHODTYPE_ALIGN;
        if (value == "stretch")
            return SVG_TEXTPATH_METHODTYPE_STRETCH;
        return SVG_TEXTPATH_METHODTYPE_UNKNOWN;
    }
};

template<>
struct SVGPropertyTraits<SVGTextPathSpacingType> {
    static SVGTextPathSpacingType highestEnumValue() { return SVG_TEXTPATH_SPACINGTYPE_EXACT; }

    static String toString(SVGTextPathSpacingType type)
    {
        switch (type) {
        case SVG_TEXTPATH_SPACINGTYPE_UNKNOWN:
            return emptyString();
        case SVG_TEXTPATH_SPACINGTYPE_AUTO:
            return "auto";
        case SVG_TEXTPATH_SPACINGTYPE_EXACT:
            return "exact";
        }

        ASSERT_NOT_REACHED();
        return emptyString();
    }

    static SVGTextPathSpacingType fromString(const String& value)
    {
        if (value == "auto")
            return SVG_TEXTPATH_SPACINGTYPE_AUTO;
        if (value == "exact")
            return SVG_TEXTPATH_SPACINGTYPE_EXACT;
        return SVG_TEXTPATH_SPACINGTYPE_UNKNOWN;
    }
};

} // namespace WebCore

#endif // ENABLE(SVG)
#endif