From 75dbdb16dd158b71ba071e3475c8bf90e3c57e52 Mon Sep 17 00:00:00 2001
From: Stefan Hanauska <stefan.hanauska@csg-in.de>
Date: Fri, 26 Sep 2025 07:52:35 +0200
Subject: [PATCH] MBS-10330: Avoid jumping when reloading map

---
 lib.php                            | 10 +++++++++-
 templates/rendercontainer.mustache |  5 ++++-
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/lib.php b/lib.php
index 3a7d6ff3..cf8397ed 100644
--- a/lib.php
+++ b/lib.php
@@ -234,7 +234,7 @@ function learningmap_cm_info_dynamic(cm_info $cm): void {
  * @return void
  */
 function learningmap_cm_info_view(cm_info $cm): void {
-    global $DB, $OUTPUT;
+    global $DB, $OUTPUT, $_REQUEST;
 
     $learningmap = $DB->get_record('learningmap', ['id' => $cm->instance]);
     $intro = '';
@@ -269,6 +269,13 @@ function learningmap_cm_info_view(cm_info $cm): void {
         $contentbeforemap = $groupdropdown . $intro;
         $hascontentbeforemap = !empty($contentbeforemap);
 
+        $mapcontent = null;
+
+        if (!empty($_REQUEST['info']) && $_REQUEST['info'] == 'core_course_get_module') {
+            // If this is an ajax request to get the cm, we need to return only the map code.
+            $mapcontent = learningmap_get_learningmap($cm);
+        }
+
         $mapcontainer = $OUTPUT->render_from_template(
             'mod_learningmap/rendercontainer',
             [
@@ -276,6 +283,7 @@ function learningmap_cm_info_view(cm_info $cm): void {
                 'enableLiveUpdater' => true,
                 'contentbeforemap' => $contentbeforemap,
                 'hascontentbeforemap' => $hascontentbeforemap,
+                'mapcontent' => $mapcontent,
             ]
         );
 
diff --git a/templates/rendercontainer.mustache b/templates/rendercontainer.mustache
index 81bd9da4..b23a5c5e 100644
--- a/templates/rendercontainer.mustache
+++ b/templates/rendercontainer.mustache
@@ -44,13 +44,16 @@
   </div>
   {{/hascontentbeforemap}}
   <div id="learningmap-render-container-{{cmId}}" class="learningmap-render-container">
-    {{> mod_learningmap/loadingplaceholder}}
+    {{^mapcontent}}{{> mod_learningmap/loadingplaceholder}}{{/mapcontent}}
+    {{{mapcontent}}}
   </div>
 </div>
 {{#js}}
+  {{^mapcontent}}
   require(['mod_learningmap/renderer'], function(renderer) {
     renderer.init({{cmId}});
   });
+  {{/mapcontent}}
   {{#enableLiveUpdater}}
       require(['mod_learningmap/initliveupdater'], function(initliveupdater) {
         initliveupdater.init({{cmId}});