Add better 404 error

Missing help pages or links with bad HID were redirected
to module entry page, masking the real issue in Help.

This patch activated the 404 page and add HID information
for debug and fix.

Change-Id: I0d55f1c36d9a6c3fab0096d5e3cd171087729691
Reviewed-on: https://gerrit.libreoffice.org/c/help/+/96401
Tested-by: Jenkins
Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/help3xsl/help2.js b/help3xsl/help2.js
index 95635c8465..f40492afb1 100644
--- a/help3xsl/help2.js
+++ b/help3xsl/help2.js
@@ -232,9 +232,12 @@ if (document.body.getElementsByTagName('meta')) {
 }
 
 var module = getParameterByName("DbPAR");
-var helpID = getParameterByName("HID");
 fixURL(module,system);
 moduleColor(module);
+var helpID = getParameterByName("HID");
+// only used in xhp pages with <help-id-missing/> tags
+var missingElement = document.getElementById("bm_HID2");
+if(missingElement != null){missingElement.innerHTML = helpID;}
 
 function debugInfo(dbg) {
     if (dbg == null) return;