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/*
* Inkscape::SVG::PathString - builder for SVG path strings
*
* 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.
*
*/
#include "svg/path-string.h"
#include "svg/stringstream.h"
#include "prefs-utils.h"
#include <algorithm>
Inkscape::SVG::PathString::PathString() :
allow_relative_coordinates(0 != prefs_get_int_attribute("options.svgoutput", "allowrelativecoordinates", 1)),
force_repeat_commands(0 != prefs_get_int_attribute("options.svgoutput", "forcerepeatcommands", 0))
{}
void Inkscape::SVG::PathString::_appendOp(char abs_op, char rel_op) {
bool abs_op_repeated = _abs_state.prevop == abs_op && !force_repeat_commands;
bool rel_op_repeated = _rel_state.prevop == rel_op && !force_repeat_commands;
unsigned int const abs_added_size = abs_op_repeated ? 0 : 2;
unsigned int const rel_added_size = rel_op_repeated ? 0 : 2;
if ( false && _rel_state.str.size()+2 < _abs_state.str.size()+abs_added_size && allow_relative_coordinates ) {
// Copy rel to abs
_abs_state = _rel_state;
_abs_state.switches++;
abs_op_repeated = false;
// We do not have to copy abs to rel:
// _rel_state.str.size()+2 < _abs_state.str.size()+abs_added_size
// _rel_state.str.size()+rel_added_size < _abs_state.str.size()+2
// _abs_state.str.size()+2 > _rel_state.str.size()+rel_added_size
} else if ( false && _abs_state.str.size()+2 < _rel_state.str.size()+rel_added_size ) {
// Copy abs to rel
_rel_state = _abs_state;
_abs_state.switches++;
rel_op_repeated = false;
}
if ( !abs_op_repeated ) _abs_state.appendOp(abs_op);
if ( !rel_op_repeated ) _rel_state.appendOp(rel_op);
}
void Inkscape::SVG::PathString::State::append(NR::Coord v) {
SVGOStringStream os;
os << ' ' << v;
str.append(os.str());
}
void Inkscape::SVG::PathString::State::append(NR::Point p) {
SVGOStringStream os;
os << ' ' << p[NR::X] << ',' << p[NR::Y];
str.append(os.str());
}
void Inkscape::SVG::PathString::State::append(NR::Coord v, NR::Coord &rv) {
SVGOStringStream os;
os << ' ' << v;
str.append(os.str());
double c;
sscanf(os.str().c_str(), " %lf", &c);
rv = c;
}
void Inkscape::SVG::PathString::State::append(NR::Point p, NR::Point &rp) {
SVGOStringStream os;
os << ' ' << p[NR::X] << ',' << p[NR::Y];
str.append(os.str());
double x, y;
sscanf(os.str().c_str(), " %lf,%lf", &x, &y);
rp[NR::X] = x;
rp[NR::Y] = y;
}
// NOTE: The following two appendRelative methods will not be exact if the total number of digits needed
// to represent the difference exceeds the precision of a double. This is not very likely though, and if
// it does happen the imprecise value is not likely to be chosen (because it will probably be a lot longer
// than the absolute value).
void Inkscape::SVG::PathString::State::appendRelative(NR::Coord v, NR::Coord r) {
SVGOStringStream os;
int precision = (int)os.precision();
int digitsBegin = (int)floor(log10(fabs(v-r))); // Position of first digit of difference
int digitsEnd = (int)floor(log10(std::min(fabs(v),fabs(r)))) - precision; // Position just beyond the last significant digit of the smallest (in absolute sense) number
os << ' ';
if (r == 0) {
os.precision(precision);
os << v;
} else if (v == 0) {
os.precision(precision);
os << -r;
} else if (digitsBegin>digitsEnd) {
os.precision(digitsBegin-digitsEnd);
os << (v-r);
} else {
// This assumes the input numbers are already rounded to 'precision' digits
os << '0';
}
str.append(os.str());
}
void Inkscape::SVG::PathString::State::appendRelative(NR::Point p, NR::Point r) {
SVGOStringStream os;
int precision = (int)os.precision();
int digitsBeginX = (int)floor(log10(fabs(p[NR::X]-r[NR::X]))); // Position of first digit of difference
int digitsEndX = (int)floor(log10(std::min(fabs(p[NR::X]),fabs(r[NR::X])))) - precision; // Position just beyond the last significant digit of the smallest (in absolute sense) number
int digitsBeginY = (int)floor(log10(fabs(p[NR::Y]-r[NR::Y]))); // Position of first digit of difference
int digitsEndY = (int)floor(log10(std::min(fabs(p[NR::Y]),fabs(r[NR::Y])))) - precision; // Position just beyond the last significant digit of the smallest (in absolute sense) number
os << ' ';
if (r[NR::X] == 0) {
os.precision(precision);
os << p[NR::X];
} else if (p[NR::X] == 0) {
os.precision(precision);
os << -r[NR::X];
} else if (digitsBeginX>digitsEndX) {
os.precision(digitsBeginX-digitsEndX);
os << (p[NR::X]-r[NR::X]);
} else {
// This assumes the input numbers are already rounded to 'precision' digits
os << '0';
}
os << ',';
if (r[NR::Y] == 0) {
os.precision(precision);
os << p[NR::Y];
} else if (p[NR::Y] == 0) {
os.precision(precision);
os << -r[NR::Y];
} else if (digitsBeginY>digitsEndY) {
os.precision(digitsBeginY-digitsEndY);
os << (p[NR::Y]-r[NR::Y]);
} else {
// This assumes the input numbers are already rounded to 'precision' digits
os << '0';
}
str.append(os.str());
}
/*
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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