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// SPDX-License-Identifier: GPL-2.0-or-later
/**
* \file src/svg/svg-angle.cpp
* \brief SVG angle type
*/
/*
* Authors:
* Tomasz Boczkowski <penginsbacon@gmail.com>
*
* Copyright (C) 1999-2002 Lauris Kaplinski
* Copyright (C) 2000-2001 Ximian, Inc.
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <cstring>
#include <string>
#include <glib.h>
#include "svg/svg-angle.h"
#include "util/units.h"
static bool sp_svg_angle_read_lff(gchar const *str, SVGAngle::Unit &unit, float &val, float &computed);
SVGAngle::SVGAngle()
: _set(false)
, unit(NONE)
, value(0)
, computed(0)
{
}
/* Angle */
bool SVGAngle::read(gchar const *str)
{
if (!str) {
return false;
}
SVGAngle::Unit u;
float v;
float c;
if (!sp_svg_angle_read_lff(str, u, v, c)) {
return false;
}
_set = true;
unit = u;
value = v;
computed = c;
return true;
}
void SVGAngle::unset(SVGAngle::Unit u, float v, float c) {
_set = false;
unit = u;
value = v;
computed = c;
}
void SVGAngle::readOrUnset(gchar const *str, Unit u, float v, float c) {
if (!read(str)) {
unset(u, v, c);
}
}
static bool sp_svg_angle_read_lff(gchar const *str, SVGAngle::Unit &unit, float &val, float &computed)
{
if (!str) {
return false;
}
gchar const *e;
float const v = g_ascii_strtod(str, (char **) &e);
if (e == str) {
return false;
}
if (!e[0]) {
/* Unitless (defaults to degrees)*/
unit = SVGAngle::NONE;
val = v;
computed = v;
return true;
} else if (!g_ascii_isalnum(e[0])) {
if (g_ascii_isspace(e[0]) && e[1] && g_ascii_isalpha(e[1])) {
return false; // spaces between value and unit are not allowed
} else {
/* Unitless (defaults to degrees)*/
unit = SVGAngle::NONE;
val = v;
computed = v;
return true;
}
} else {
if (strncmp(e, "deg", 3) == 0) {
unit = SVGAngle::DEG;
val = v;
computed = v;
} else if (strncmp(e, "grad", 4) == 0) {
unit = SVGAngle::GRAD;
val = v;
computed = Inkscape::Util::Quantity::convert(v, "grad", "°");
} else if (strncmp(e, "rad", 3) == 0) {
unit = SVGAngle::RAD;
val = v;
computed = Inkscape::Util::Quantity::convert(v, "rad", "°");
} else if (strncmp(e, "turn", 4) == 0) {
unit = SVGAngle::TURN;
val = v;
computed = Inkscape::Util::Quantity::convert(v, "turn", "°");
} else {
return false;
}
return true;
}
/* Invalid */
return false;
}
/*
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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