Add superscript capability to RichTextField (for AP mostly) (#557)

* Add superscript capability to RichTextField (for AP mostly)

* Add superscript as default to editor

global_settings/wagtail_hooks.py

@@ -0,0 +1,31 @@
+import wagtail.admin.rich_text.editors.draftail.features as draftail_features
+from wagtail.admin.rich_text.converters.html_to_contentstate import InlineStyleElementHandler
+from wagtail.core import hooks
+
+
+@hooks.register('register_rich_text_features')
+def register_strikethrough_feature(features):
+    """
+    Registering the `superscript` feature, which uses the `SUPERSCRIPT` Draft.js inline style type,
+    and is stored as HTML with an `<sup>` tag.
+    """
+    feature_name = 'superscript'
+    type_ = 'SUPERSCRIPT'
+    tag = 'sup'
+
+    control = {
+        'type': type_,
+        'label': '^',
+        'description': 'Superscript',
+    }
+
+    features.register_editor_plugin(
+        'draftail', feature_name, draftail_features.InlineStyleFeature(control)
+    )
+
+    db_conversion = {
+        'from_database_format': {tag: InlineStyleElementHandler(type_)},
+        'to_database_format': {'style_map': {type_: tag}},
+    }
+    features.default_features.append(feature_name)
+    features.register_converter_rule('contentstate', feature_name, db_conversion)

news/models.py

@@ -1,10 +1,9 @@
 from django.db import models
 from django import forms
-from django.contrib.sites.shortcuts import get_current_site
 
 from wagtail.core.models import Page
 from wagtail.core.fields import RichTextField, StreamField
-from wagtail.admin.edit_handlers import FieldPanel, PageChooserPanel, StreamFieldPanel
+from wagtail.admin.edit_handlers import FieldPanel, StreamFieldPanel
 from wagtail.images.edit_handlers import ImageChooserPanel
 from wagtail.documents.edit_handlers import DocumentChooserPanel
 from wagtail.embeds.blocks import EmbedBlock

pages/models.py

@@ -1362,7 +1362,7 @@ class Technology(Page):
 
 
 class ErrataList(Page):
-    correction_schedule = RichTextField(features=['link', 'bold', 'italic', 'hr', 'ol', 'ul'])
+    correction_schedule = RichTextField()
 
     api_fields = (
         'correction_schedule',