From 6f56f68447351021fd48d37fbf22c0ff7e896f3f Mon Sep 17 00:00:00 2001
From: Thomas Hackl <hackl@data-quest.de>
Date: Mon, 17 Jul 2023 08:47:08 +0000
Subject: [PATCH] =?UTF-8?q?Resolve=20"Forum:=20Schreiben=20von=20Beitr?=
 =?UTF-8?q?=C3=A4gen=20kaputt"?=
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Closes #2919 and #2921

Merge request studip/studip!1968
---
 .../assets/javascripts/bootstrap/sidebar.js   |  2 +-
 resources/assets/javascripts/lib/sidebar.js   | 23 ++++++++-----------
 .../assets/stylesheets/scss/sidebar.scss      |  8 +++++--
 3 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/resources/assets/javascripts/bootstrap/sidebar.js b/resources/assets/javascripts/bootstrap/sidebar.js
index 5e89a7fc472..df21f16acf7 100644
--- a/resources/assets/javascripts/bootstrap/sidebar.js
+++ b/resources/assets/javascripts/bootstrap/sidebar.js
@@ -3,7 +3,6 @@ import eventBus from '../lib/event-bus.ts';
 STUDIP.ready(() => {
     // Manually nudge sidebar under main header.
     STUDIP.Sidebar.place();
-
     STUDIP.Sidebar.observeBody();
     STUDIP.Sidebar.observeFooter();
     STUDIP.Sidebar.observeSidebar();
@@ -11,4 +10,5 @@ STUDIP.ready(() => {
     document.defaultView.addEventListener('resize',() => {
         STUDIP.Sidebar.reset();
     });
+
 });
diff --git a/resources/assets/javascripts/lib/sidebar.js b/resources/assets/javascripts/lib/sidebar.js
index 17362fa017c..17c96b90a3b 100644
--- a/resources/assets/javascripts/lib/sidebar.js
+++ b/resources/assets/javascripts/lib/sidebar.js
@@ -22,7 +22,7 @@ const Sidebar = {
         const sidebar = document.getElementById('sidebar');
         if (sidebar) {
             const sObserver = new IntersectionObserver(STUDIP.Sidebar.fits, options);
-            sObserver.observe();
+            sObserver.observe(sidebar, options);
         }
     },
 
@@ -36,11 +36,11 @@ const Sidebar = {
             for (const mutation of mutations) {
                 if ((!mutation.oldValue || mutation.oldValue.indexOf('fixed') === -1)
                     && mutation.target.classList.contains('fixed')) {
-                    sidebar.classList.add('fixed');
                     sidebar.style.top = '';
+                    sidebar.classList.add('fixed');
                 } else if (mutation.oldValue && mutation.oldValue.indexOf('fixed') !== -1
                     && !mutation.target.classList.contains('fixed')) {
-                    sidebar.classList.remove('fixed');
+                    STUDIP.Sidebar.reset();
                 }
             }
         });
@@ -64,17 +64,18 @@ const Sidebar = {
          * Observe if the footer is visible in viewport.
          */
         const fObserver = new IntersectionObserver(STUDIP.Sidebar.footerVisible, options);
-        fObserver.observe(document.getElementById('main-footer'));
+        fObserver.observe(document.getElementById('main-footer'), options);
 
     },
 
     reset() {
         const sidebar = document.getElementById('sidebar');
         if (sidebar) {
-            sidebar.classList.remove('oversized', 'adjusted', 'fixed');
+            sidebar.classList.remove('oversized', 'was-oversized', 'fixed');
             sidebar.style.top = '';
+            STUDIP.Sidebar.place();
+            STUDIP.Sidebar.observeSidebar();
         }
-        STUDIP.Sidebar.observe();
     },
 
     fits(entries, observer) {
@@ -85,7 +86,7 @@ const Sidebar = {
                 if (entry.isIntersecting) {
                     sidebar.classList.remove('oversized');
                 } else {
-                    sidebar.classList.add('oversized', 'adjusted');
+                    sidebar.classList.add('oversized', 'was-oversized');
                 }
             });
         }
@@ -97,13 +98,9 @@ const Sidebar = {
             entries.forEach(entry => {
                 // Footer is visible on current page.
                 if (entry.isIntersecting) {
-                    if (sidebar.classList.contains('no-footer')) {
-                        sidebar.classList.remove('no-footer');
-                    }
+                    sidebar.classList.remove('no-footer');
                 } else {
-                    if (!sidebar.classList.contains('no-footer')) {
-                        sidebar.classList.add('no-footer');
-                    }
+                    sidebar.classList.add('no-footer');
                 }
             });
         }
diff --git a/resources/assets/stylesheets/scss/sidebar.scss b/resources/assets/stylesheets/scss/sidebar.scss
index 60114c7dbab..d03ede60577 100644
--- a/resources/assets/stylesheets/scss/sidebar.scss
+++ b/resources/assets/stylesheets/scss/sidebar.scss
@@ -1,7 +1,7 @@
 #sidebar {
-    background: $white;
     border-left: 0;
     display: inline-block;
+    height: max-content;
     margin-bottom: $page-margin + 35px;
     margin-top: 15px;
     padding: 0 5px 7px 15px;
@@ -11,7 +11,11 @@
     width: $sidebar-width;
     z-index: 2;
 
-    &.adjusted {
+    &.fixed {
+        top: 55px;
+    }
+
+    &.was-oversized {
         height: calc(100vh - 265px);
         position: fixed;
         overflow-x: hidden;
-- 
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