/*

 * Copyright 2017 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkSVGPattern_DEFINED

#define SkSVGPattern_DEFINED

#include "include/core/SkRefCnt.h"

#include "include/private/base/SkAPI.h"

#include "modules/svg/include/SkSVGHiddenContainer.h"

#include "modules/svg/include/SkSVGNode.h"

#include "modules/svg/include/SkSVGTypes.h"

#include "src/base/SkTLazy.h"

class SkPaint;

class SkSVGRenderContext;

class SK_API SkSVGPattern final : public SkSVGHiddenContainer {

public:

    static sk_sp<SkSVGPattern> Make() {

        return sk_sp<SkSVGPattern>(new SkSVGPattern());

    }

    SVG_ATTR(Href, SkSVGIRI, SkSVGIRI())

    SVG_OPTIONAL_ATTR(X               , SkSVGLength)

    SVG_OPTIONAL_ATTR(Y               , SkSVGLength)

    SVG_OPTIONAL_ATTR(Width           , SkSVGLength)

    SVG_OPTIONAL_ATTR(Height          , SkSVGLength)

    SVG_OPTIONAL_ATTR(PatternTransform, SkSVGTransformType)

protected:

    SkSVGPattern();

    bool parseAndSetAttribute(const char*, const char*) override;

    bool onAsPaint(const SkSVGRenderContext&, SkPaint*) const override;

private:

    struct PatternAttributes {

        SkTLazy<SkSVGLength>        fX,

                                    fY,

                                    fWidth,

                                    fHeight;

        SkTLazy<SkSVGTransformType> fPatternTransform;

    };

    const SkSVGPattern* resolveHref(const SkSVGRenderContext&, PatternAttributes*) const;

    const SkSVGPattern* hrefTarget(const SkSVGRenderContext&) const;

    // TODO:

    //   - patternUnits

    //   - patternContentUnits

    using INHERITED = SkSVGHiddenContainer;

};

#endif // SkSVGPattern_DEFINED