customscripts: add download segment event

This PR adds a segment event for copy downloads across docs pages. The event
text will be sent as a property, along with the URL and version in order to
differentiate what users are looking at.

Release note: None

src/current/js/customscripts.js

@@ -240,9 +240,8 @@ $(function() {
     // find the filter set with this scope
     $('[data-scope].current').each(function(index) {
       // console.log("data-scope is: " + $(this).attr('data-scope'));
-      // if the target scope is in the same group as the current scope for that 
+      // if the target scope is in the same group as the current scope for that
       // group, remove the current class
-
       const sectionScopes = $(this).attr('data-scope').split(" ");
       // multiple scopes can be set, so try each scope, but stop after removing current
       sectionScopes.every(v => {
@@ -442,7 +441,16 @@ $(function() {
 
   clipboard.on('success', function(e) {
     $(e.trigger).addClass('copy-clipboard--copied');
-    // $(e.trigger).find('.copy-clipboard__text').text('copied');
+    $(e.trigger).find('.copy-clipboard__text').text('copied');
+
+    try {
+      window.analytics.track("copied_core_download_link", {
+        text: e.text, // The copied text is sent as a property.
+        url: window.location.href,
+      });
+    } catch (e) {
+      console.error("Error submitting event", e);
+    }
   });
 
   $('[data-tooltip]').tooltip();