Truncate long hostnames in monitoring view Host column

Hostnames longer than 32 characters are now truncated with an ellipsis
in view.py tables, with the full name shown as a tooltip on hover. The
copy buttons in the Extra column keep copying the full, untruncated
hostname regardless of the displayed text.

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to **Checkmk SwissKnife** are documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.16.2] - 2026-07-29
+
+### Changed
+- Long hostnames in the Host column of monitoring views (`view.py`) are now truncated to 32 characters with an ellipsis, showing the full name in a tooltip on hover. The copy buttons in the Extra column still copy the full, untruncated hostname.
+
 ## [2.16.1] - 2026-07-13
 
 ### Fixed

README.md

@@ -88,6 +88,8 @@ Adds a dedicated **Extra** column before the Host column in all monitoring view
 
 The IP address is read from the tooltip Checkmk places on the hostname cell. Clicking any clipboard button briefly turns it green to confirm the copy.
 
+Hostnames longer than 32 characters are truncated with an ellipsis in the Host column; hover to see the full name in a tooltip. The copy buttons above always copy the full, untruncated hostname regardless of what's displayed.
+
 Applies to: `view.py` host and service views.
 
 ---

user_script/checkmk_swissknife.user.js

@@ -1,7 +1,7 @@
 // ==UserScript==
 // @name         Checkmk SwissKnife
 // @namespace    https://luigidacunto.com/
-// @version      2.16.1
+// @version      2.16.2
 // @checkmk      2.3.x - 2.4.x
 // @description  Collection of UI improvements for Checkmk WATO. Each fix or enhancement is added here as an independent feature.
 // @author       Luigi D'Acunto
@@ -821,8 +821,16 @@
   // In view.py pages (monitoring views), adds a small button next to each
   // hostname in the Host column to directly open the host's Service Discovery
   // page in a new tab.
+  //
+  // The hostname shown in the Host column link is truncated to
+  // HOST_DISPLAY_MAX_LEN characters (with a title tooltip holding the full
+  // name) when it exceeds the threshold. The copy buttons (Extra column)
+  // always use `hostname`, taken from the `host` href parameter, never the
+  // truncated text.
   // =========================================================================
 
+  const HOST_DISPLAY_MAX_LEN = 32; // ~15 char typical hostname + ".ad.aruba.it" + margin
+
   function addInventoryButtons(doc) {
     if (doc.body.dataset.cmkInventoryBtns === '1') return;
 
@@ -931,6 +939,14 @@
             const h = new URLSearchParams(a.getAttribute('href').split('?')[1] || '').get('host');
             if (h) {
               const hostname = h, shortname = h.split('.')[0];
+
+              // Truncate the displayed name (copy buttons below always use the full `hostname`/`shortname`)
+              const displayName = a.textContent.trim();
+              if (displayName.length > HOST_DISPLAY_MAX_LEN) {
+                a.title = displayName;
+                a.textContent = displayName.slice(0, HOST_DISPLAY_MAX_LEN - 1) + '…';
+              }
+
               const group = doc.createElement('span');
               group.className = 'cmk-sk-btn-group';