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#!/usr/bin/env python3
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
#
import os
import re
import sys
# Inspired by http://www.unitconversion.org/unit_converter/typography.html
#
# Additionally:
# - supports UNO API's mm100 by default
# - supports OOXML's EMU by default
# - possible to extend
conv = {
'inch': 914400, # "there are 914,400 EMUs per inch"
'point': 914400/72, # EMU / point
'twip': 914400/72/20, # EMU / twip
'm': 360*100000, # EMU / m
'cm': 360*1000, # EMU is defined as 1/360,000 of a centimeter
'mm': 360*100, # EMU / mm
'mm100': 360, # EMU / mm100
'emu': 1, # EMU / EMU
}
# We know that VirtualDevices use a DPI of 96.
# Could use 'gtk.gdk.screen_get_default().get_resolution()' from pygtk.
conv['pixel'] = conv['inch'] / int(os.environ.get("DPI", "96"))
def convert(amount, fro, to):
# convert to EMU
emu = amount * conv[re.sub("s$", "", fro)]
return emu / conv[re.sub("s$", "", to)]
def main(args):
try:
amount = float(args[1])
fro = args[2]
to = args[4]
except IndexError:
print("usage: tpconv <amount> <from> in <to>")
return
print(convert(amount, fro, to))
if __name__ == '__main__':
main(sys.argv)
# vim:set filetype=python shiftwidth=4 softtabstop=4 expandtab:
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