84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
import gettext
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import os
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import sys
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from typing import Callable
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from kivy._event import Observable
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from katrain.core.utils import find_package_resource
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from katrain.gui.style import DEFAULT_FONT
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class Lang(Observable):
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observers = []
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callbacks = []
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FONTS = {"ko": "fonts/NotoSansKR-Regular.otf", "haha": "fonts/NotoSansKR-Regular.otf"}
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def __init__(self, lang):
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super(Lang, self).__init__()
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self.lang = None
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self.switch_lang(lang)
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def _(self, text):
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return self.ugettext(text)
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def set_widget_font(self, widget):
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widget.font_name = self.font_name
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for sub_widget in [getattr(widget, "_hint_lbl", None), getattr(widget, "_msg_lbl", None)]: # MDText
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if sub_widget:
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sub_widget.font_name = self.font_name
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def fbind(self, name, func, *args):
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if name == "_":
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widget, property, *_ = args[0]
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self.observers.append((widget, func, args))
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try:
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self.set_widget_font(widget)
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except Exception as e:
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print(e)
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# pass
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else:
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return super(Lang, self).fbind(name, func, *args)
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def funbind(self, name, func, *args):
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if name == "_":
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widget, *_ = args[0]
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key = (widget, func, args)
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if key in self.observers:
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self.observers.remove(key)
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else:
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return super(Lang, self).funbind(name, func, *args)
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def add_callback(self, callback_fn: Callable): # TODO refactor w app
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self.callbacks.append(callback_fn)
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def switch_lang(self, lang):
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if lang == self.lang:
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return
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# get the right locales directory, and instantiate a gettext
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self.lang = lang
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self.font_name = self.FONTS.get(lang) or DEFAULT_FONT
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i18n_dir, _ = os.path.split(find_package_resource("katrain/i18n/__init__.py"))
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locale_dir = os.path.join(i18n_dir, "locales")
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locales = gettext.translation("katrain", locale_dir, languages=[lang])
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self.ugettext = locales.gettext
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# update all the kv rules attached to this text
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for widget, func, args in self.observers:
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try:
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func(args[0], None, None)
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self.set_widget_font(widget)
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except ReferenceError:
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pass # proxy no longer exists
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except Exception as e:
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print("Error in switching languages",e)
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for cb in self.callbacks:
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try:
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cb(self)
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except Exception as e:
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print(f"Failed callback on language change: {e}", file=sys.stderr)
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DEFAULT_LANGUAGE = "en"
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i18n = Lang(DEFAULT_LANGUAGE)
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