🚧 [#1924] Dark scheme for django-tinymce

src/openforms/js/index.js

@@ -1,5 +1,5 @@
 import {Formio} from 'react-formio';
-
+import './initTinymce';
 import './components';
 import OpenForms from './formio_module';
 

src/openforms/js/initTinymce.js

@@ -0,0 +1,91 @@
+// Taken from https://github.com/jazzband/django-tinymce/blob/master/tinymce/static/django_tinymce/init_tinymce.js
+// Updated to add dark theme detection (L35-44)
+
+'use strict';
+
+{
+  function initTinyMCE(el) {
+    if (el.closest('.empty-form') === null) {  // Don't do empty inlines
+      var mce_conf = JSON.parse(el.dataset.mceConf);
+
+      // There is no way to pass a JavaScript function as an option
+      // because all options are serialized as JSON.
+      const fns = [
+        'color_picker_callback',
+        'file_browser_callback',
+        'file_picker_callback',
+        'images_dataimg_filter',
+        'images_upload_handler',
+        'paste_postprocess',
+        'paste_preprocess',
+        'setup',
+        'urlconverter_callback',
+      ];
+      fns.forEach((fn_name) => {
+        if (typeof mce_conf[fn_name] != 'undefined') {
+          if (mce_conf[fn_name].includes('(')) {
+            mce_conf[fn_name] = eval('(' + mce_conf[fn_name] + ')');
+          }
+          else {
+            mce_conf[fn_name] = window[mce_conf[fn_name]];
+          }
+        }
+      });
+
+      // TODO Django 4.2: use explicit theme names rather than the media query approach:
+      // https://github.com/django/django/blob/main/django/contrib/admin/static/admin/css/dark_mode.css#L36
+      const useDarkMode = window.matchMedia('(prefers-color-scheme: dark)').matches;
+      mce_conf = {
+        ...mce_conf,
+        ...{
+          skin: useDarkMode ? 'oxide-dark' : 'oxide',
+          content_css: useDarkMode ? 'dark' : 'default',
+        }
+      }
+
+      const id = el.id;
+      if ('elements' in mce_conf && mce_conf['mode'] == 'exact') {
+        mce_conf['elements'] = id;
+      }
+      if (el.dataset.mceGzConf) {
+        tinyMCE_GZ.init(JSON.parse(el.dataset.mceGzConf));
+      }
+      if (!tinyMCE.get(id)) {
+        tinyMCE.init(mce_conf);
+      }
+    }
+  }
+
+  // Call function fn when the DOM is loaded and ready. If it is already
+  // loaded, call the function now.
+  // https://youmightnotneedjquery.com/#ready
+  function ready(fn) {
+    if (document.readyState !== 'loading') {
+      fn();
+    } else {
+      document.addEventListener('DOMContentLoaded', fn);
+    }
+  }
+
+  function initializeTinyMCE(element, formsetName) {
+    Array.from(element.querySelectorAll('.tinymce')).forEach(area => initTinyMCE(area));
+  }
+
+  ready(function() {
+    // initialize the TinyMCE editors on load
+    initializeTinyMCE(document);
+
+    // initialize the TinyMCE editor after adding an inline in the django admin context.
+    if (typeof(django) !== 'undefined' && typeof(django.jQuery) !== 'undefined') {
+      django.jQuery(document).on('formset:added', (event, $row, formsetName) => {
+        if (event.detail && event.detail.formsetName) {
+          // Django >= 4.1
+          initializeTinyMCE(event.target);
+        } else {
+          // Django < 4.1, use $row
+          initializeTinyMCE($row.get(0));
+        }
+      });
+    }
+  });
+}