| 1 | # -*- coding: utf-8 -*-
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| 2 |
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| 3 | import gettext
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| 4 | import os
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| 5 | import traceback
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| 6 |
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| 7 | #------------------------------------------------------------------------------
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| 8 |
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| 9 | ## @package mlx.i18n
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| 10 | #
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| 11 | # Internationalization support.
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| 12 | #
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| 13 | # This module handles the internationalization support in the logger. It is
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| 14 | # based on the GNU gettext library, and exports the \ref xstr function that
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| 15 | # returns the translation for a certain key.
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| 16 |
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| 17 | #------------------------------------------------------------------------------
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| 18 |
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| 19 | _translation = None
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| 20 | _language = None
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| 21 |
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| 22 | #------------------------------------------------------------------------------
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| 23 |
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| 24 | def setLanguage(programDirectory, language):
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| 25 | """Setup the internationalization support for the given language."""
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| 26 | print("i18n.setLanguage", language)
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| 27 | translation = _getTranslation(programDirectory, language)
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| 28 | fallback = _getFallbackFor(programDirectory, language)
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| 29 | if translation is None:
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| 30 | translation = fallback
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| 31 | elif fallback is not None:
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| 32 | translation.add_fallback(fallback)
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| 33 | assert translation is not None
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| 34 |
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| 35 | global _translation, _language
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| 36 | _translation = translation
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| 37 | _language = language
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| 38 |
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| 39 | #------------------------------------------------------------------------------
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| 40 |
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| 41 | def getLanguage():
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| 42 | """Get the two-letter language code."""
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| 43 | underscoreIndex = _language.find("_")
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| 44 | return _language[:underscoreIndex] if underscoreIndex>0 else _language
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| 45 |
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| 46 | #------------------------------------------------------------------------------
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| 47 |
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| 48 | def xstr(key):
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| 49 | """Get the string for the given key in the current language.
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| 50 |
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| 51 | If not found, the fallback language is searched. If that is not found
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| 52 | either, the key itself is returned within curly braces."""
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| 53 | return _translation.gettext(key)
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| 54 |
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| 55 | #------------------------------------------------------------------------------
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| 56 |
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| 57 | def _getFallbackFor(programDirectory, language):
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| 58 | """Get the fallback for the given language.
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| 59 |
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| 60 | If the language is English, None is returned, otherwise the English
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| 61 | language translation."""
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| 62 | if language in ["en", "en_GB"]:
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| 63 | return None
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| 64 | else:
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| 65 | return _getTranslation(programDirectory, "en")
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| 66 |
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| 67 | #------------------------------------------------------------------------------
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| 68 |
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| 69 | def _getTranslation(programDirectory, language):
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| 70 | """Get the translation for the given language."""
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| 71 | try:
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| 72 | return gettext.translation("mlx",
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| 73 | localedir = os.path.join(programDirectory,
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| 74 | "locale"),
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| 75 | languages = [language])
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| 76 | except:
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| 77 | traceback.print_exc()
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| 78 | return None
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| 79 |
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| 80 | #------------------------------------------------------------------------------
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