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/** @file
* @brief Path sink which writes an SVG-compatible command string
*//*
* Authors:
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
* Copyright 2014 Authors
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*/
#ifndef LIB2GEOM_SEEN_SVG_PATH_WRITER_H
#define LIB2GEOM_SEEN_SVG_PATH_WRITER_H
#include <2geom/path-sink.h>
#include <sstream>
namespace Geom {
/** @brief Serialize paths to SVG path data strings.
* You can access the generated string by calling the str() method.
* @ingroup Paths
*/
class SVGPathWriter
: public PathSink
{
public:
SVGPathWriter();
~SVGPathWriter() override {}
void moveTo(Point const &p) override;
void lineTo(Point const &p) override;
void quadTo(Point const &c, Point const &p) override;
void curveTo(Point const &c0, Point const &c1, Point const &p) override;
void arcTo(double rx, double ry, double angle,
bool large_arc, bool sweep, Point const &p) override;
void closePath() override;
void flush() override;
/// Clear any path data written so far.
void clear();
/** @brief Set output precision.
* When the parameter is negative, the path writer enters a verbatim mode
* which preserves all values exactly. */
void setPrecision(int prec);
/** @brief Enable or disable length optimization.
*
* When set to true, the path writer will optimize the generated path data
* for minimum length. However, this will make the data less readable,
* because spaces between commands and coordinates will be omitted where
* unnecessary for correct parsing.
*
* When set to false, the string will be a straightforward, partially redundant
* representation of the passed commands, optimized for readability.
* Commands and coordinates will always be separated by spaces and the command
* symbol will not be omitted for multiple consecutive commands of the same type.
*
* Length optimization is turned off by default. */
void setOptimize(bool opt) { _optimize = opt; }
/** @brief Enable or disable the use of V, H, T and S commands where possible.
* Shorthands are turned on by default. */
void setUseShorthands(bool use) { _use_shorthands = use; }
/// Retrieve the generated path data string.
std::string str() const { return _s.str(); }
private:
void _setCommand(char cmd);
std::string _formatCoord(Coord par);
std::ostringstream _s, _ns;
std::vector<Coord> _current_pars;
Point _subpath_start;
Point _current;
Point _quad_tangent;
Point _cubic_tangent;
Coord _epsilon;
int _precision;
bool _optimize;
bool _use_shorthands;
char _command;
};
std::string write_svg_path(PathVector const &pv, int prec = -1, bool optimize = false, bool shorthands = true);
} // namespace Geom
#endif // LIB2GEOM_SEEN_SVG_PATH_WRITER_H
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
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