/usr/lib/python3/dist-packages/cairosvg/surface/units.py is in python3-cairosvg 1.0.4-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | # -*- coding: utf-8 -*-
# This file is part of CairoSVG
# Copyright © 2010-2012 Kozea
#
# This library is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the Free
# Software Foundation, either version 3 of the License, or (at your option) any
# later version.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
# details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with CairoSVG. If not, see <http://www.gnu.org/licenses/>.
"""
Units functions.
"""
UNITS = {
"mm": 1 / 25.4,
"cm": 1 / 2.54,
"in": 1,
"pt": 1 / 72.,
"pc": 1 / 6.,
"px": None}
def size(surface, string, reference="xy"):
"""Replace a ``string`` with units by a float value.
If ``reference`` is a float, it is used as reference for percentages. If it
is ``'x'``, we use the viewport width as reference. If it is ``'y'``, we
use the viewport height as reference. If it is ``'xy'``, we use
``(viewport_width ** 2 + viewport_height ** 2) ** .5 / 2 ** .5`` as
reference.
"""
if not string:
return 0.
try:
return float(string)
except ValueError:
# Not a float, try something else
pass
if "%" in string:
if reference == "x":
reference = surface.context_width or 0
elif reference == "y":
reference = surface.context_height or 0
elif reference == "xy":
reference = (
(surface.context_width ** 2 + surface.context_height ** 2)
** .5 / 2 ** .5)
return float(string.strip(" %")) * reference / 100
elif "em" in string:
return surface.font_size * float(string.strip(" em"))
elif "ex" in string:
# Assume that 1em == 2ex
return surface.font_size * float(string.strip(" ex")) / 2
for unit, coefficient in UNITS.items():
if unit in string:
number = float(string.strip(" " + unit))
return number * (surface.dpi * coefficient if coefficient else 1)
# Try to return the number at the beginning of the string
return_string = ""
while string and (string[0].isdigit() or string[0] in "+-."):
return_string += string[0]
string = string[1:]
# Unknown size or multiple sizes
return float(return_string or 0)
|