From a09d25a35abbe2e560a202c766758af2ac6a56e0 Mon Sep 17 00:00:00 2001
From: yflory <yann.flory@xwiki.com>
Date: Thu, 7 Jan 2021 16:21:05 +0100
Subject: [PATCH] Stay at max scroll in rich text on content update

---
 www/pad/inner.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/www/pad/inner.js b/www/pad/inner.js
index 4968cf4cd..ea6c262d8 100644
--- a/www/pad/inner.js
+++ b/www/pad/inner.js
@@ -729,6 +729,11 @@ define([
             cursor.offsetUpdate();
             var oldText = inner.outerHTML;
 
+            // Get scroll position
+            var sTop = $iframe.scrollTop();
+            var sTopMax = $iframe.innerHeight() - $('iframe').innerHeight();
+            var scrollMax = sTop === sTopMax;
+
             // Apply the changes
             var patch = (DD).diff(inner, userDocStateDom);
             (DD).apply(inner, patch);
@@ -765,6 +770,10 @@ define([
             comments.onContentUpdate();
 
             updateTOC();
+
+            if (scrollMax) {
+                $iframe.scrollTop($iframe.innerHeight());
+            }
         });
 
         framework.setTextContentGetter(function() {