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Konstantinos Bairaktaris
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Feb 28, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| class EventDispatcher(object): | ||
| LABELS = ['FETCHING_TRANSLATIONS', 'TRANSLATIONS_FETCHED', | ||
| 'TRANSLATIONS_FETCH_FAILED', 'LOCALE_CHANGED', | ||
| 'FETCHING_LOCALES', 'LOCALES_FETCHED', 'LOCALES_FETCH_FAILED'] | ||
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| def __init__(self): | ||
| self.callbacks = {} | ||
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| def on(self, label, callback): | ||
| self._require_label(label) | ||
| self.callbacks.setdefault(label, set()).add(callback) | ||
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| def off(self, label, callback): | ||
| self._require_label(label) | ||
| # Can raise KeyError if callback is not there | ||
| self.callbacks.get(label, set()).remove(callback) | ||
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| def trigger(self, label, *args, **kwargs): | ||
| self._require_label(label) | ||
| for callback in self.callbacks.get(label, []): | ||
| callback(*args, **kwargs) | ||
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| def _require_label(self, label): | ||
| if label not in self.LABELS: | ||
| raise ValueError("Label '{}' is not supported".format(label)) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| """ Utilities for integrating urwid applications with Transifex Native. """ | ||
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| import urwid | ||
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| from transifex.native import t, tx | ||
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| class Variable(object): | ||
| """ Holds a value and will trigger events on change. | ||
| >>> v = Variable(1) | ||
| >>> v.on_change(lambda: print("New value: " + v.get())) | ||
| >>> v.set(v.get() + 1) | ||
| <<< # New value: 2 | ||
| """ | ||
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| def __init__(self, value): | ||
| self._value = value | ||
| self._callbacks = set() | ||
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| def get(self): | ||
| return self._value | ||
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| def set(self, value): | ||
| if value != self._value: | ||
| self._value = value | ||
| for callback in self._callbacks: | ||
| callback(value) | ||
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| def on_change(self, callback): | ||
| self._callbacks.add(callback) | ||
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| def off_change(self, callback): | ||
| self._callbacks.remove(callback) | ||
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| class T(urwid.Text): | ||
| """ Usage: | ||
| Render the string in the current language. Will rerender on language | ||
| change: | ||
| >>> T("Hello world") | ||
| Render using the variable as template parameter, will rerender on | ||
| language change and if the parameter changes value: | ||
| >>> variable = Variable("Bob") | ||
| >>> T("Hello {username}", {'username': variable}) | ||
| >>> variable.set("Jill") | ||
| Render inside an untranslatable wrapper template: | ||
| >>> T("Hello world", wrapper="Translation: {}") | ||
| """ | ||
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| def __init__(self, source_string, params=None, wrapper=None, _context=None, | ||
| _charlimit=None, _comment=None, _occurrences=None, _tags=None, | ||
| *args, **kwargs): | ||
| if params is None: | ||
| params = {} | ||
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| self._source_string = source_string | ||
| self._params = params | ||
| self._wrapper = wrapper | ||
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| tx.on("LOCALE_CHANGED", self.rerender) | ||
| for key, value in self._params.items(): | ||
| try: | ||
| value.on_change(self.rerender) | ||
| except AttributeError: | ||
| pass | ||
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| super().__init__("", *args, **kwargs) | ||
| self.rerender() | ||
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| def rerender(self, *args, **kwargs): | ||
| params = {} | ||
| for key, value in self._params.items(): | ||
| try: | ||
| params[key] = value.get() | ||
| except AttributeError: | ||
| params[key] = value | ||
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| translation = t(self._source_string, params=params) | ||
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| if self._wrapper is not None: | ||
| self.set_text(self._wrapper.format(translation)) | ||
| else: | ||
| self.set_text(translation) | ||
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| def language_picker(source_language=None): | ||
| """ Returns an array of radio buttons for language selection. | ||
| The 'source_language' must be a dictionary describing the source | ||
| language, with at least the 'name' and 'code' fields. If unset, | ||
| `{'name': "English", 'code': "en"}` will be used | ||
| """ | ||
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| if source_language is None: | ||
| source_language = {'name': "English", 'code': "en"} | ||
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| languages = tx.fetch_languages() | ||
| if not any((language['code'] == source_language['code'] | ||
| for language in languages)): | ||
| languages = [source_language] + languages | ||
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| language_group, language_radio = [], [] | ||
| for language in languages: | ||
| button = urwid.RadioButton(language_group, language['name']) | ||
| urwid.connect_signal(button, 'change', _on_language_select, | ||
| language['code']) | ||
| language_radio.append(button) | ||
| return language_radio | ||
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| def _on_language_select(radio_button, new_state, language_code): | ||
| if new_state: | ||
| tx.set_current_language(language_code) |