Refactor to not repeat lots of Jinja code

app/assets/javascripts/colourPreview.js

@@ -9,7 +9,10 @@
     this.start = component => {
 
       this.$input = $('input', component);
-      this.$preview = $('.textbox-colour-preview', component);
+
+      $(component).append(
+        this.$preview = $('<span class="textbox-colour-preview"></span>')
+      );
 
       this.$input
         .on('change keyup', this.update)

app/templates/components/textbox.html

@@ -4,6 +4,7 @@
   hint=False,
   highlight_tags=False,
   autofocus=False,
+  colour_preview=False,
   help_link=None,
   help_link_text=None,
   width='2-3',
@@ -11,7 +12,10 @@
   safe_error_message=False,
   rows=8
 ) %}
-  <div class="form-group{% if field.errors %} form-group-error{% endif %}" {% if autofocus %}data-module="autofocus"{% endif %}>
+  <div
+    class="form-group{% if field.errors %} form-group-error{% endif %}"
+    data-module="{% if autofocus %}autofocus{% elif colour_preview %}colour-preview{% endif %}"
+  >
     <label class="form-label" for="{{ field.name }}">
       {% if label %}
         {{ label }}
@@ -57,28 +61,3 @@
     {% endif %}
   </div>
 {% endmacro %}
-
-{% macro colour_textbox(
-  field,
-  width='2-3'
-) %}
-  <div class="form-group{% if field.errors %} form-group-error{% endif %}" data-module="colour-preview">
-    <label class="form-label" for="{{ field.name }}">
-      {{ field.label.text }}
-      {% if field.errors %}
-        <span class="error-message" data-module="track-error" data-error-type="{{ field.errors[0] }}" data-error-label="{{ field.name }}">
-          {{ field.errors[0] }}
-        </span>
-      {% endif %}
-    </label>
-    {% set field_class = 'form-control-{} {}'.format(width, 'textbox-right-aligned' if suffix else '') %}
-    {% set field_class = 'form-control ' + field_class + (' form-control-error' if field.errors else '') %}
-    {{ field(
-      class=field_class,
-      data_module='',
-      rows='1',
-      **kwargs
-    ) }}
-    <span class="textbox-colour-preview"></span>
-  </div>
-{% endmacro %}

app/templates/views/email-branding/manage-branding.html

@@ -1,7 +1,7 @@
 {% extends "views/platform-admin/_base_template.html" %}
 {% from "components/file-upload.html" import file_upload %}
 {% from "components/page-footer.html" import page_footer %}
-{% from "components/textbox.html" import textbox, colour_textbox %}
+{% from "components/textbox.html" import textbox %}
 
 {% block service_page_title %}
   {{ '{} email branding'.format('Update' if email_branding else 'Create')}}
@@ -22,9 +22,9 @@
         <div class="form-group">
           <div style='margin-top:15px;'>{{textbox(form.name)}}</div>
           <div style='margin-top:15px;'>{{textbox(form.text)}}</div>
-          {{colour_textbox(form.colour, width='1-4', colour=email_branding.colour if email_branding)}}
-          {{colour_textbox(form.banner_colour, width='1-4', colour=email_branding.banner_colour if email_branding)}}
-          {{colour_textbox(form.single_id_colour, width='1-4', colour=email_branding.single_id_colour if email_branding)}}
+          {{ textbox(form.colour, width='1-4', colour_preview=True) }}
+          {{ textbox(form.banner_colour, width='1-4', colour_preview=True) }}
+          {{ textbox(form.single_id_colour, width='1-4', colour_preview=True) }}
            <div style='margin-top:15px;'>{{textbox(form.domain)}}</div>
           {{ page_footer(
             'Save',

app/templates/views/organisations/organisation/settings/edit-name/index.html

@@ -1,6 +1,6 @@
 {% extends "org_template.html" %}
 {% from "components/page-footer.html" import page_footer %}
-{% from "components/textbox.html" import textbox, colour_textbox %}
+{% from "components/textbox.html" import textbox %}
 
 {% block org_page_title %}
   Change organisation name