Translate HTML text based in the HTML "lang" attribute see BT#15166

$_configuration['translate_html'] = false;

main/document/create_document.php

@@ -171,7 +171,7 @@ if ($relative_url == '') {
 
 $is_allowed_to_edit = api_is_allowed_to_edit(null, true);
 $editorConfig = [
-    'ToolbarSet' => ($is_allowed_to_edit ? 'Documents' : 'DocumentsStudent'),
+    'ToolbarSet' => $is_allowed_to_edit ? 'Documents' : 'DocumentsStudent',
     'Width' => '100%',
     'Height' => '400',
     'cols-size' => [2, 10, 0],

main/inc/ajax/lang.ajax.php

@@ -0,0 +1,76 @@
+<?php
+/* For licensing terms, see /license.txt */
+
+/**
+ * Responses to AJAX calls.
+ */
+require_once __DIR__.'/../global.inc.php';
+
+api_protect_course_script(true);
+
+$action = $_REQUEST['a'];
+
+switch ($action) {
+    case 'translate_html':
+        $translate = api_get_configuration_value('translate_html');
+
+        if (!$translate) {
+            exit;
+        }
+
+        $languageList = api_get_languages();
+        $hideAll = '';
+        foreach ($languageList['all'] as $language) {
+            $hideAll .= '$("span:lang('.$language['isocode'].')").filter(
+            function() {
+                // Ignore ckeditor classes
+                return !this.className.match(/cke(.*)/);
+            }).hide();';
+        }
+
+        $userInfo = api_get_user_info();
+        $languageId = api_get_language_id($userInfo['language']);
+        $languageInfo = api_get_language_info($languageId);
+
+        echo '
+            $(document).ready(function() {
+                 '.$hideAll.'                 
+                var defaultLanguageFromUser = "'.$languageInfo['isocode'].'";                                
+                $("span:lang('.$languageInfo['isocode'].')").filter(
+                    function() {
+                        // Ignore ckeditor classes
+                        return !this.className.match(/cke(.*)/);
+                }).show();
+                
+                var defaultLanguage = "";
+                var langFromUserFound = false;
+                $(this).find("span").filter(
+                    function() {
+                        // Ignore ckeditor classes
+                        return !this.className.match(/cke(.*)/);
+                }).each(function() {
+                    defaultLanguage = $(this).attr("lang");                            
+                    if (defaultLanguage) {
+                        $(this).before().next("br").remove();                
+                        if (defaultLanguageFromUser == defaultLanguage) {
+                            langFromUserFound = true;
+                        }
+                    }
+                });
+                
+                // Show default language
+                if (langFromUserFound == false && defaultLanguage) {
+                    $("span:lang("+defaultLanguage+")").filter(
+                    function() {
+                            // Ignore ckeditor classes
+                            return !this.className.match(/cke(.*)/);
+                    }).show();
+                }                  
+
+            });
+        ';
+        break;
+    default:
+        echo '';
+}
+exit;

main/inc/lib/display.lib.php

@@ -2815,6 +2815,12 @@ HTML;
             }
         }
 
+        $translateHtml = '';
+        $translate = api_get_configuration_value('translate_html');
+        if ($translate) {
+            $translateHtml = '{type:"script", id:"_fr4", src:"'.api_get_path(WEB_AJAX_PATH).'lang.ajax.php?a=translate_html&'.api_get_cidreq().'"},';
+        }
+
         $defaultFeatures = implode("','", $defaultFeatures);
         $frameReady = '
           $.frameReady(function() {
@@ -2841,6 +2847,7 @@ HTML;
                 {type: "stylesheet", id: "_media2", src: "'.api_get_path(WEB_PUBLIC_PATH).'assets/mediaelement/build/mediaelementplayer.min.css"},                
                 {type: "stylesheet", id: "_media4", src: "'.api_get_path(WEB_PUBLIC_PATH).'assets/mediaelement/plugins/vrview/vrview.css"},
                 {type: "script", id: "_media4", src: "'.api_get_path(WEB_PUBLIC_PATH).'assets/mediaelement/plugins/vrview/vrview.js"},
+                '.$translateHtml.'
             ]
           });';
 

main/inc/lib/javascript/ckeditor/config_js.php

@@ -31,5 +31,13 @@ if (!empty($courseId)) {
 }
 $template->assign('course_condition', $courseCondition);
 
+$languageList = api_get_languages();
+$list = [];
+foreach ($languageList['all'] as $language) {
+    $list[] = $language['isocode'].':'.$language['original_name'];
+}
+
+$template->assign('language_list', implode("','", $list));
+
 header('Content-type: application/x-javascript');
 $template->display($template->get_template('javascript/editor/ckeditor/config_js.tpl'));

main/install/configuration.dist.php

@@ -1131,6 +1131,9 @@ VALUES (2, 13, 'session_courses_read_only_mode', 'Lock Course In Session', 1, 1,
 // Allow to show users in a map, users need to have a coordinates extra field BT#15176
 //$_configuration['allow_social_map_fields'] = ['fields' => ['terms_villedustage', 'terms_ville']];
 
+// Translate HTML based in the HTML "lang" attribute see BT#15166
+//$_configuration['translate_html'] = false;
+
 // ------ Custom DB changes (keep this at the end)
 // Add user activation by confirmation email
 // This option prevents the new user to login in the platform if your account is not confirmed via email

main/template/default/javascript/editor/ckeditor/config_js.tpl

@@ -114,6 +114,8 @@ CKEDITOR.editorConfig = function (config) {
         '{{ font_awesome_css }}',
         '{{ css_editor }}',
     ];
+
+    config.language_list = ['{{ language_list }}'];
 };
 
 // Sets default target to "_blank" in link plugin

src/Chamilo/CoreBundle/Component/Editor/CkEditor/Toolbar/Documents.php

@@ -78,6 +78,7 @@ class Documents extends Basic
                 'NumberedList',
                 'BulletedList',
                 '-',
+                api_get_configuration_value('translate_html') ? 'Language' : '',
                 api_get_setting('allow_spellcheck') === 'true' ? 'Scayt' : '',
             ],
             '/',
@@ -123,6 +124,7 @@ class Documents extends Basic
                 'BGColor',
             ],
             [
+                api_get_configuration_value('translate_html') ? 'Language' : '',
                 'ShowBlocks',
                 'Source',
             ],