[FIX] web_editor: reintroduce source mode in debug

In 12.3 there was a number of changes in source mode. This was reverted
before 13.0 and somehow it seems the source mode was lost between the
12.3 editor changes and its revert.

With this changeset, we introduce back source mode as it was in 12.

opw-2091649
opw-2116960
closes #40026

Signed-off-by: Nicolas Lempereur (nle) <nle@odoo.com>

addons/web_editor/static/src/js/backend/field_html.js

@@ -3,6 +3,7 @@ odoo.define('web_editor.field.html', function (require) {
 
 var ajax = require('web.ajax');
 var basic_fields = require('web.basic_fields');
+var config = require('web.config');
 var core = require('web.core');
 var Wysiwyg = require('web_editor.wysiwyg.root');
 var field_registry = require('web.field_registry');
@@ -14,6 +15,8 @@ var TranslatableFieldMixin = basic_fields.TranslatableFieldMixin;
 var QWeb = core.qweb;
 var assetsLoaded;
 
+var jinjaRegex = /(^|\n)\s*%\s(end|set\s)/;
+
 /**
  * FieldHtml Widget
  * Intended to display HTML content. This widget uses the wysiwyg editor
@@ -96,6 +99,10 @@ var FieldHtml = basic_fields.DebouncedField.extend(TranslatableFieldMixin, {
      */
     commitChanges: function () {
         var self = this;
+        if (config.isDebug() && this.mode === 'edit') {
+            var layoutInfo = $.summernote.core.dom.makeLayoutInfo(this.wysiwyg.$editor);
+            $.summernote.pluginEvents.codeview(undefined, undefined, layoutInfo, false);
+        }
         if (this.mode == "readonly" || !this.isRendered) {
             return this._super();
         }
@@ -199,6 +206,20 @@ var FieldHtml = basic_fields.DebouncedField.extend(TranslatableFieldMixin, {
                 if (para && para[1] && para[1].indexOf('checklist') === -1) {
                     para[1].splice(2, 0, 'checklist');
                 }
+                if (config.isDebug()) {
+                    options.codeview = true;
+                    var view = _.find(options.toolbar, function (item) {
+                        return item[0] === 'view';
+                    });
+                    if (view) {
+                        if (!view[1].includes('codeview')) {
+                            view[1].splice(-1, 0, 'codeview');
+                        }
+                    } else {
+                        options.toolbar.splice(-1, 0, ['view', ['codeview']]);
+                    }
+                }
+                options.prettifyHtml = false;
                 return options;
             },
         });
@@ -341,7 +362,7 @@ var FieldHtml = basic_fields.DebouncedField.extend(TranslatableFieldMixin, {
      */
     _textToHtml: function (text) {
         var value = text || "";
-        if (/%\send/.test(value)) { // is jinja
+        if (jinjaRegex.test(value)) { // is jinja
             return value;
         }
         try {
@@ -464,6 +485,12 @@ var FieldHtml = basic_fields.DebouncedField.extend(TranslatableFieldMixin, {
             top: '+5px',
         });
         this.$el.append($button);
+        // force source editor if it contains multiline Jinja directives
+        if (jinjaRegex.test(this._getValue())) {
+            var layoutInfo = $.summernote.core.dom.makeLayoutInfo(this.wysiwyg.$editor);
+            layoutInfo.toolbar().hide();
+            $.summernote.pluginEvents.codeview(undefined, undefined, layoutInfo, true);
+        }
     },
     /**
      * @private