Add special input widgets for markdown fields (#1577)

* Add markdown text input widgets

* Update src/pretix/static/pretixcontrol/scss/_forms.scss

* Improvements

---------

Co-authored-by: Raphael Michel <michel@rami.io>

src/pretix/control/forms/event.py

@@ -55,12 +55,14 @@ from django.utils.timezone import get_current_timezone_name
 from django.utils.translation import gettext, gettext_lazy as _, pgettext_lazy
 from django_countries.fields import LazyTypedChoiceField
 from i18nfield.forms import (
-    I18nForm, I18nFormField, I18nFormSetMixin, I18nTextarea, I18nTextInput,
+    I18nForm, I18nFormField, I18nFormSetMixin, I18nTextInput,
 )
 from pytz import common_timezones
 
 from pretix.base.channels import get_all_sales_channels
-from pretix.base.forms import I18nModelForm, PlaceholderValidator, SettingsForm
+from pretix.base.forms import (
+    I18nMarkdownTextarea, I18nModelForm, PlaceholderValidator, SettingsForm,
+)
 from pretix.base.models import Event, Organizer, TaxRule, Team
 from pretix.base.models.event import EventFooterLink, EventMetaValue, SubEvent
 from pretix.base.reldate import RelativeDateField, RelativeDateTimeField
@@ -988,7 +990,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_signature = I18nFormField(
         label=_("Signature"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This will be attached to every email. Available placeholders: {event}"),
         validators=[PlaceholderValidator(['{event}'])],
         widget_kwargs={'attrs': {
@@ -1011,7 +1013,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_placed = I18nFormField(
         label=_("Text sent to order contact address"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_send_order_placed_attendee = forms.BooleanField(
         label=_("Send an email to attendees"),
@@ -1027,7 +1029,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_placed_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
 
     mail_subject_order_paid = I18nFormField(
@@ -1038,7 +1040,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_paid = I18nFormField(
         label=_("Text sent to order contact address"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_send_order_paid_attendee = forms.BooleanField(
         label=_("Send an email to attendees"),
@@ -1054,7 +1056,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_paid_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
 
     mail_subject_order_free = I18nFormField(
@@ -1065,7 +1067,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_free = I18nFormField(
         label=_("Text sent to order contact address"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_send_order_free_attendee = forms.BooleanField(
         label=_("Send an email to attendees"),
@@ -1081,7 +1083,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_free_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
 
     mail_subject_order_changed = I18nFormField(
@@ -1092,7 +1094,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_changed = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_resend_link = I18nFormField(
         label=_("Subject (sent by admin)"),
@@ -1107,7 +1109,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_resend_link = I18nFormField(
         label=_("Text (sent by admin)"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_resend_all_links = I18nFormField(
         label=_("Subject (requested by user)"),
@@ -1117,7 +1119,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_resend_all_links = I18nFormField(
         label=_("Text (requested by user)"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_days_order_expire_warning = forms.IntegerField(
         label=_("Number of days"),
@@ -1129,7 +1131,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_expire_warning = I18nFormField(
         label=_("Text (if order will expire automatically)"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_order_expire_warning = I18nFormField(
         label=_("Subject (if order will expire automatically)"),
@@ -1139,7 +1141,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_pending_warning = I18nFormField(
         label=_("Text (if order will not expire automatically)"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_order_pending_warning = I18nFormField(
         label=_("Subject (if order will not expire automatically)"),
@@ -1154,7 +1156,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_incomplete_payment = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This email only applies to payment methods that can receive incomplete payments, "
                     "such as bank transfer."),
     )
@@ -1166,7 +1168,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_payment_failed = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_waiting_list = I18nFormField(
         label=_("Subject"),
@@ -1176,7 +1178,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_waiting_list = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_order_canceled = I18nFormField(
         label=_("Subject"),
@@ -1186,12 +1188,12 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_canceled = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_text_order_custom_mail = I18nFormField(
         label=_("Text"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_download_reminder = I18nFormField(
         label=_("Subject sent to order contact address"),
@@ -1201,7 +1203,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_download_reminder = I18nFormField(
         label=_("Text sent to order contact address"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_send_download_reminder_attendee = forms.BooleanField(
         label=_("Send an email to attendees"),
@@ -1217,7 +1219,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_download_reminder_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_days_download_reminder = forms.IntegerField(
         label=_("Number of days"),
@@ -1234,7 +1236,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_placed_require_approval = I18nFormField(
         label=_("Text for received order"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     mail_subject_order_approved = I18nFormField(
         label=_("Subject for approved order"),
@@ -1244,7 +1246,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_approved = I18nFormField(
         label=_("Text for approved order"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This will only be sent out for non-free orders. Free orders will receive the free order "
                     "template from below instead."),
     )
@@ -1262,7 +1264,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_approved_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This will only be sent out for non-free orders. Free orders will receive the free order "
                     "template from below instead."),
     )
@@ -1274,7 +1276,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_approved_free = I18nFormField(
         label=_("Text for approved free order"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This will only be sent out for free orders. Non-free orders will receive the non-free order "
                     "template from above instead."),
     )
@@ -1292,7 +1294,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_approved_free_attendee = I18nFormField(
         label=_("Text sent to attendees"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         help_text=_("This will only be sent out for free orders. Non-free orders will receive the non-free order "
                     "template from above instead."),
     )
@@ -1304,7 +1306,7 @@ class MailSettingsForm(FormPlaceholderMixin, SettingsForm):
     mail_text_order_denied = I18nFormField(
         label=_("Text for denied order"),
         required=False,
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
     )
     base_context = {
         'mail_text_order_placed': ['event', 'order', 'payments'],
@@ -1737,7 +1739,7 @@ class ItemMetaPropertyForm(forms.ModelForm):
 
 class ConfirmTextForm(I18nForm):
     text = I18nFormField(
-        widget=I18nTextarea,
+        widget=I18nMarkdownTextarea,
         widget_kwargs={'attrs': {'rows': '2'}},
     )