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/*
* Inkscape::SVG::PathString - builder for SVG path strings
*
* Copyright 2007 MenTaLguY <mental@rydia.net>
* Copyright 2008 Jasper van de Gronde <th.v.d.gronde@hccnet.nl>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* See the file COPYING for details.
*
*/
#ifndef SEEN_INKSCAPE_SVG_PATH_STRING_H
#define SEEN_INKSCAPE_SVG_PATH_STRING_H
#include <glibmm/ustring.h>
#include "libnr/nr-point.h"
#include "libnr/nr-point-ops.h"
#include "svg/stringstream.h"
namespace Inkscape {
namespace SVG {
class PathString {
public:
PathString();
// default copy
// default assign
Glib::ustring const &ustring() const {
return (_abs_state <= _rel_state || !allow_relative_coordinates) ? _abs_state.str : _rel_state.str;
}
operator Glib::ustring const &() const {
return ustring();
}
char const *c_str() const {
return ustring().c_str();
}
PathString &moveTo(NR::Coord x, NR::Coord y) {
return moveTo(NR::Point(x, y));
}
PathString &moveTo(NR::Point p) {
_appendOp('M','m');
_appendPoint(p);
_current_point = _initial_point = p;
return *this;
}
PathString &lineTo(NR::Coord x, NR::Coord y) {
return lineTo(NR::Point(x, y));
}
PathString &lineTo(NR::Point p) {
_appendOp('L','l');
_appendPoint(p);
_current_point = p;
return *this;
}
PathString &quadTo(NR::Coord cx, NR::Coord cy, NR::Coord x, NR::Coord y) {
return quadTo(NR::Point(cx, cy), NR::Point(x, y));
}
PathString &quadTo(NR::Point c, NR::Point p) {
_appendOp('Q','q');
_appendPoint(c);
_appendPoint(p);
_current_point = p;
return *this;
}
PathString &curveTo(NR::Coord x0, NR::Coord y0,
NR::Coord x1, NR::Coord y1,
NR::Coord x, NR::Coord y)
{
return curveTo(NR::Point(x0, y0), NR::Point(x1, y1), NR::Point(x, y));
}
PathString &curveTo(NR::Point c0, NR::Point c1, NR::Point p) {
_appendOp('C','c');
_appendPoint(c0);
_appendPoint(c1);
_appendPoint(p);
_current_point = p;
return *this;
}
PathString &arcTo(NR::Coord rx, NR::Coord ry, NR::Coord rot,
bool large_arc, bool sweep,
NR::Point p)
{
_appendOp('A','a');
_appendValue(NR::Point(rx,ry));
_appendValue(rot);
_appendFlag(large_arc);
_appendFlag(sweep);
_appendPoint(p);
_current_point = p;
return *this;
}
PathString &closePath() {
_abs_state.appendOp('z');
_rel_state.appendOp('z');
_current_point = _initial_point;
return *this;
}
private:
void _appendOp(char abs_op, char rel_op);
void _appendFlag(bool flag) {
_abs_state.append(flag);
_rel_state.append(flag);
}
void _appendValue(NR::Coord v) {
_abs_state.append(v);
_rel_state.append(v);
}
void _appendValue(NR::Point p) {
_abs_state.append(p);
_rel_state.append(p);
}
void _appendX(NR::Coord x) {
_abs_state.append(x);
_rel_state.append(x-_current_point[NR::X]);
}
void _appendY(NR::Coord y) {
_abs_state.append(y);
_rel_state.append(y-_current_point[NR::Y]);
}
void _appendPoint(NR::Point p) {
_abs_state.append(p);
_rel_state.append(p-_current_point);
}
struct State {
State() { prevop = 0; switches = 0; }
void appendOp(char op) {
if (!str.empty()) str.append(1, ' ');
str.append(1, op);
prevop = op == 'M' ? 'L' : op == 'm' ? 'l' : op;
}
void append(bool flag) {
str.append(1, ' ');
str.append(1, ( flag ? '1' : '0' ));
}
void append(NR::Coord v) {
SVGOStringStream os;
os << ' ' << v;
str.append(os.str());
}
void append(NR::Point p) {
SVGOStringStream os;
os << ' ' << p[NR::X] << ',' << p[NR::Y];
str.append(os.str());
}
bool operator<=(const State& s) const {
if ( str.size() < s.str.size() ) return true;
if ( str.size() > s.str.size() ) return false;
if ( switches < s.switches ) return true;
if ( switches > s.switches ) return false;
return true;
}
Glib::ustring str;
unsigned int switches;
char prevop;
} _abs_state, _rel_state; // State with the last operator being an absolute/relative operator
NR::Point _initial_point;
NR::Point _current_point;
bool const allow_relative_coordinates;
bool const force_repeat_commands;
};
}
}
#endif
/*
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:encoding=utf-8:textwidth=99 :
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