Support for inofficial languages

src/pretix/control/forms/__init__.py

@@ -1,6 +1,7 @@
 import os
 
 from django import forms
+from django.conf import settings
 from django.utils.html import conditional_escape
 from django.utils.translation import ugettext_lazy as _
 
@@ -102,3 +103,68 @@ class SlugWidget(forms.TextInput):
         ctx = super().get_context(name, value, attrs)
         ctx['pre'] = self.prefix
         return ctx
+
+
+class MultipleLanguagesWidget(forms.CheckboxSelectMultiple):
+    option_template_name = 'pretixcontrol/multi_languages_widget.html'
+
+    def sort(self):
+        self.choices = sorted(self.choices, key=lambda l: (
+            (
+                0 if l[0] in settings.LANGUAGES_OFFICIAL
+                else (
+                    1 if l[0] not in settings.LANGUAGES_INCUBATING
+                    else 2
+                )
+            ), str(l[1])
+        ))
+
+    def options(self, name, value, attrs=None):
+        self.sort()
+        return super().options(name, value, attrs)
+
+    def optgroups(self, name, value, attrs=None):
+        self.sort()
+        return super().optgroups(name, value, attrs)
+
+    def create_option(self, name, value, label, selected, index, subindex=None, attrs=None):
+        opt = super().create_option(name, value, label, selected, index, subindex, attrs)
+        opt['official'] = value in settings.LANGUAGES_OFFICIAL
+        opt['incubating'] = value in settings.LANGUAGES_INCUBATING
+        return opt
+
+
+class SingleLanguageWidget(forms.Select):
+
+    def modify(self):
+        if hasattr(self, '_modified'):
+            return self.choices
+        self.choices = sorted(self.choices, key=lambda l: (
+            (
+                0 if l[0] in settings.LANGUAGES_OFFICIAL
+                else (
+                    1 if l[0] not in settings.LANGUAGES_INCUBATING
+                    else 2
+                )
+            ), str(l[1])
+        ))
+        new_choices = []
+        for k, v in self.choices:
+            new_choices.append((
+                k,
+                v if k in settings.LANGUAGES_OFFICIAL
+                else (
+                    '{} (inofficial translation)'.format(v) if k not in settings.LANGUAGES_INCUBATING
+                    else '{} (translation in progress)'.format(v)
+                )
+            ))
+        self._modified = True
+        self.choices = new_choices
+
+    def options(self, name, value, attrs=None):
+        self.modify()
+        return super().options(name, value, attrs)
+
+    def optgroups(self, name, value, attrs=None):
+        self.modify()
+        return super().optgroups(name, value, attrs)

src/pretix/control/forms/event.py

@@ -17,7 +17,8 @@ from pretix.base.models import Event, Organizer, TaxRule
 from pretix.base.models.event import EventMetaValue, SubEvent
 from pretix.base.reldate import RelativeDateField, RelativeDateTimeField
 from pretix.control.forms import (
-    ExtFileField, SlugWidget, SplitDateTimePickerWidget,
+    ExtFileField, MultipleLanguagesWidget, SingleLanguageWidget, SlugWidget,
+    SplitDateTimePickerWidget,
 )
 from pretix.multidomain.urlreverse import build_absolute_uri
 from pretix.presale.style import get_fonts
@@ -27,7 +28,7 @@ class EventWizardFoundationForm(forms.Form):
     locales = forms.MultipleChoiceField(
         choices=settings.LANGUAGES,
         label=_("Use languages"),
-        widget=forms.CheckboxSelectMultiple,
+        widget=MultipleLanguagesWidget,
         help_text=_('Choose all languages that your event should be available in.')
     )
     has_subevents = forms.BooleanField(
@@ -279,11 +280,12 @@ class EventSettingsForm(SettingsForm):
     )
     locales = forms.MultipleChoiceField(
         choices=settings.LANGUAGES,
-        widget=forms.CheckboxSelectMultiple,
+        widget=MultipleLanguagesWidget,
         label=_("Available languages"),
     )
     locale = forms.ChoiceField(
         choices=settings.LANGUAGES,
+        widget=SingleLanguageWidget,
         label=_("Default language"),
     )
     show_quota_left = forms.BooleanField(
@@ -637,6 +639,8 @@ class InvoiceSettingsForm(SettingsForm):
             (r.identifier, r.verbose_name) for r in event.get_invoice_renderers().values()
         ]
         self.fields['invoice_numbers_prefix'].widget.attrs['placeholder'] = event.slug.upper() + '-'
+        locale_names = dict(settings.LANGUAGES)
+        self.fields['invoice_language'].choices = [('__user__', _('The user\'s language'))] + [(a, locale_names[a]) for a in event.settings.locales]
 
 
 class MailSettingsForm(SettingsForm):

src/pretix/control/forms/organizer.py

@@ -7,7 +7,7 @@ from i18nfield.forms import I18nFormField, I18nTextarea
 
 from pretix.base.forms import I18nModelForm, SettingsForm
 from pretix.base.models import Organizer, Team
-from pretix.control.forms import ExtFileField
+from pretix.control.forms import ExtFileField, MultipleLanguagesWidget
 from pretix.multidomain.models import KnownDomain
 from pretix.presale.style import get_fonts
 
@@ -158,7 +158,7 @@ class OrganizerDisplaySettingsForm(SettingsForm):
     locales = forms.MultipleChoiceField(
         choices=settings.LANGUAGES,
         label=_("Use languages"),
-        widget=forms.CheckboxSelectMultiple,
+        widget=MultipleLanguagesWidget,
         help_text=_('Choose all languages that your organizer homepage should be available in.')
     )
     primary_font = forms.ChoiceField(