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annotate sat_frontends/tools/misc.py @ 3330:7b47f48d31f3

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plugin XEP-0264: fix orientation of thumbnails: Rotation of thumbnailis is now modified according to EXIF orientation data. Original image is not modified as user may want to keep it, and orientation transformation can modify encoding parameters. Update `pillow` minimum version to the first one with `exif_transpose` implementation.
author Goffi <goffi@goffi.org>
date Thu, 13 Aug 2020 23:46:18 +0200
parents 559a625a236b
children 80815f2f12cf
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2
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3
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4 # SAT helpers methods for plugins
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5 # Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)
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6
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7 # This program is free software: you can redistribute it and/or modify
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8 # it under the terms of the GNU Affero General Public License as published by
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9 # the Free Software Foundation, either version 3 of the License, or
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10 # (at your option) any later version.
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11
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12 # This program is distributed in the hope that it will be useful,
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13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 # GNU Affero General Public License for more details.
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16
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17 # You should have received a copy of the GNU Affero General Public License
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18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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19
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20
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21 class InputHistory(object):
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22 def _updateInputHistory(self, text=None, step=None, callback=None, mode=""):
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23 """Update the lists of previously sent messages. Several lists can be
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24 handled as they are stored in a dictionary, the argument "mode" being
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25 used as the entry key. There's also a temporary list to allow you play
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26 with previous entries before sending a new message. Parameters values
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27 can be combined: text is None and step is None to initialize a main
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28 list and the temporary one, step is None to update a list and
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29 reinitialize the temporary one, step is not None to update
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30 the temporary list between two messages.
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31 @param text: text to be saved.
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32 @param step: step to move the temporary index.
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33 @param callback: method to display temporary entries.
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34 @param mode: the dictionary key for main lists.
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35 """
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36 if not hasattr(self, "input_histories"):
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37 self.input_histories = {}
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38 history = self.input_histories.setdefault(mode, [])
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39 if step is None and text is not None:
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40 # update the main list
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41 if text in history:
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42 history.remove(text)
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43 history.append(text)
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44 length = len(history)
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45 if step is None or length == 0:
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46 # prepare the temporary list and index
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47 self.input_history_tmp = history[:]
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48 self.input_history_tmp.append("")
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49 self.input_history_index = length
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50 if step is None:
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51 return
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52 # update the temporary list
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53 if text is not None:
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54 # save the current entry
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55 self.input_history_tmp[self.input_history_index] = text
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56 # move to another entry if possible
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57 index_tmp = self.input_history_index + step
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58 if index_tmp >= 0 and index_tmp < len(self.input_history_tmp):
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59 if callback is not None:
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60 callback(self.input_history_tmp[index_tmp])
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61 self.input_history_index = index_tmp
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64 class FlagsHandler(object):
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65 """Small class to handle easily option flags
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66
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67 the instance is initialized with an iterable
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68 then attribute return True if flag is set, False else.
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69 """
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70
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71 def __init__(self, flags):
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72 self.flags = set(flags or [])
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73 self._used_flags = set()
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74
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75 def __getattr__(self, flag):
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76 self._used_flags.add(flag)
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77 return flag in self.flags
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78
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79 def __len__(self):
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80 return len(self.flags)
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81
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82 def __iter__(self):
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83 return self.flags.__iter__()
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84
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85 @property
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86 def all_used(self):
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87 """Return True if all flags have been used"""
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88 return self._used_flags.issuperset(self.flags)
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89
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90 @property
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91 def unused(self):
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92 """Return flags which has not been used yet"""
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93 return self.flags.difference(self._used_flags)