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15347 fschmid 1
/*
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 * callback interface for SVG path data
12065 fschmid 3
 *
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 * Copyright 2007 MenTaLguY <mental@rydia.net>
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it either under the terms of the GNU Lesser General Public
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 * License version 2.1 as published by the Free Software Foundation
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 * (the "LGPL") or, at your option, under the terms of the Mozilla
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 * Public License Version 1.1 (the "MPL"). If you do not alter this
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 * notice, a recipient may use your version of this file under either
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 * the MPL or the LGPL.
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 *
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 * You should have received a copy of the LGPL along with this library
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 * in the file COPYING-LGPL-2.1; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 * You should have received a copy of the MPL along with this library
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 * in the file COPYING-MPL-1.1
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 *
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 * The contents of this file are subject to the Mozilla Public License
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 * Version 1.1 (the "License"); you may not use this file except in
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 * compliance with the License. You may obtain a copy of the License at
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 * http://www.mozilla.org/MPL/
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 *
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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 * OF ANY KIND, either express or implied. See the LGPL or the MPL for
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 * the specific language governing rights and limitations.
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 *
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 */
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#ifndef SEEN_SVG_PATH_H
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#define SEEN_SVG_PATH_H
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#include "path.h"
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#include <iterator>
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namespace Geom {
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class SVGPathSink {
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public:
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    virtual void moveTo(Point p) = 0;
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    virtual void lineTo(Point p) = 0;
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    virtual void curveTo(Point c0, Point c1, Point p) = 0;
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    virtual void quadTo(Point c, Point p) = 0;
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    virtual void arcTo(double rx, double ry, double angle,
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                       bool large_arc, bool sweep, Point p) = 0;
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    virtual void closePath() = 0;
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    virtual void finish() = 0;
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    virtual ~SVGPathSink() {}
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};
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void output_svg_path(Path &path, SVGPathSink &sink);
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template <typename OutputIterator>
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class SVGPathGenerator : public SVGPathSink {
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public:
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    explicit SVGPathGenerator(OutputIterator out)
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    : _in_path(false), _out(out) {}
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    void moveTo(Point p) {
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        finish();
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        _path.start(p);
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        _in_path = true;
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    }
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//TODO: what if _in_path = false?
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    void lineTo(Point p) {
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        _path.template appendNew<LineSegment>(p);
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    }
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    void quadTo(Point c, Point p) {
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        _path.template appendNew<QuadraticBezier>(c, p);
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    }
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    void curveTo(Point c0, Point c1, Point p) {
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        _path.template appendNew<CubicBezier>(c0, c1, p);
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    }
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    void arcTo(double rx, double ry, double angle,
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               bool large_arc, bool sweep, Point p)
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    {
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        _path.template appendNew<SVGEllipticalArc>(rx, ry, angle,
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                                                 large_arc, sweep, p);
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    }
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    void closePath() {
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        _path.close();
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        finish();
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    }
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    void finish() {
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        if (_in_path) {
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            _in_path = false;
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            *_out = _path;
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            _path.clear();
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            _path.close(false);
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        }
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    }
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protected:
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    bool _in_path;
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    OutputIterator _out;
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    Path _path;
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};
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typedef std::back_insert_iterator<std::vector<Path> > iter;
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class PathBuilder : public SVGPathGenerator<iter> {
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private:
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    std::vector<Path> _pathset;
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public:
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    PathBuilder() : SVGPathGenerator<iter>(iter(_pathset)) {}
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    std::vector<Path> const &peek() const {return _pathset;}
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};
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}
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#endif
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/*
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  Local Variables:
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  mode:c++
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  c-file-style:"stroustrup"
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  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
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  indent-tabs-mode:nil
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  fill-column:99
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  End:
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*/
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// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :