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annotate sat/tools/common/utils.py @ 3237:b0c57c9a4bd8

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plugin XEP-0384: OMEMO trust policy: OMEMO trust policy can now be specified. For now there are 2 policies: - `manual`: each new device fingerprint must be explicitly trusted or not before the device can be used, and the message sent - `BTBV` (Blind Trust Before Verification): each new device fingerprint is automically trusted, until user manually trust or not a device, in which case the behaviour becomes the same as for `manual` for the entity. When using the Trust UI, user can put the entity back to blind trust if they wish. A message is send as feedback to user when a new device is/must be trusted, trying to explain clearly what's happening to the user. Devices which have been automically trusted are marked, so user can know which ones may cause security issue.
author Goffi <goffi@goffi.org>
date Fri, 27 Mar 2020 10:02:14 +0100
parents 9d0df638c8b4
children 1649bbe8d07e
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1 #!/usr/bin/env python3
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3 # SàT: a XMPP client
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4 # Copyright (C) 2009-2020 Jérôme Poisson (goffi@goffi.org)
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5
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6 # This program is free software: you can redistribute it and/or modify
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7 # it under the terms of the GNU Affero General Public License as published by
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8 # the Free Software Foundation, either version 3 of the License, or
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9 # (at your option) any later version.
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11 # This program is distributed in the hope that it will be useful,
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12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 # GNU Affero General Public License for more details.
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16 # You should have received a copy of the GNU Affero General Public License
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17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 """Misc utils for both backend and frontends"""
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22 def per_luminance(red, green, blue):
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23 """Caculate the perceived luminance of a RGB color
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25 @param red(int): 0-1 normalized value of red
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26 @param green(int): 0-1 normalized value of green
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27 @param blue(int): 0-1 normalized value of blue
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28 @return (float): 0-1 value of luminance (<0.5 is dark, else it's light)
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29 """
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30 # cf. https://stackoverflow.com/a/1855903, thanks Gacek
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32 return 0.299 * red + 0.587 * green + 0.114 * blue