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Diffstat (limited to 'src/svg/svg-angle.cpp')
-rw-r--r-- | src/svg/svg-angle.cpp | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/svg/svg-angle.cpp b/src/svg/svg-angle.cpp new file mode 100644 index 0000000..0e4af4f --- /dev/null +++ b/src/svg/svg-angle.cpp @@ -0,0 +1,134 @@ +// 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(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::Unit::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::Unit::NONE; + val = v; + computed = v; + return true; + } + } else { + if (strncmp(e, "deg", 3) == 0) { + unit = SVGAngle::Unit::DEG; + val = v; + computed = v; + } else if (strncmp(e, "grad", 4) == 0) { + unit = SVGAngle::Unit::GRAD; + val = v; + computed = Inkscape::Util::Quantity::convert(v, "grad", "°"); + } else if (strncmp(e, "rad", 3) == 0) { + unit = SVGAngle::Unit::RAD; + val = v; + computed = Inkscape::Util::Quantity::convert(v, "rad", "°"); + } else if (strncmp(e, "turn", 4) == 0) { + unit = SVGAngle::Unit::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 : |