Scrolling feature.

Disabling the scrolling feature after the
page gets filled by /track/transaction results.
Such results are not guaranteed to be sorted
in any way, so there is little point in scrolling
down towards "older" results.

The scrolling feature will be re-enabled once
the page will again be filled with results from
/history - notably, on page refresh.

1 files changed, 11 insertions, 2 deletions

diff --git a/js/backoffice.js b/js/backoffice.js
index 82b0ae6..35e5c88 100644
--- a/js/backoffice.js
+++ b/js/backoffice.js
@@ -31,6 +31,7 @@ var FRACTION = 100000000;
 var START = 0;
 var DELTA = 5
 var LAST = 0;
+var SCROLL = true;
 
 /**
  * This function *could* "type check" 'amount',
@@ -161,6 +162,13 @@ var track_transfer = function(exchange, wtid, cb){
     if(4 == req.readyState){
       switch(req.status){
       case 200:
+        /* Scroll is disabled after showing /track/transfer
+         * results on the page; that's because those results
+         * are not guaranteed to be sorted any how, so there
+         * is little to no point in scrolling towards "older"
+         * results: older than what?  The scroll feature will
+         * be re-enabled from the /history callback.  */
+        SCROLL = false;
         var tracks = JSON.parse(req.responseText);
         cb(false,
            tracks.deposits_sums,
@@ -538,6 +546,7 @@ function change_instance(){
  * to 'fill_table()'.
  */
 function get_history(scroll, cb){
+  SCROLL = true;
   var qs = `/history?instance=${get_instance()}&delta=${DELTA}`;
   if(scroll){
     START = LAST;
@@ -579,8 +588,8 @@ document.addEventListener
 document.addEventListener
   ("scroll", function(){
   /* If page bottom is hit */
-  if(window.innerHeight + window.scrollY
-       >= document.body.offsetHeight)
+  if((window.innerHeight + window.scrollY
+       >= document.body.offsetHeight) && SCROLL)
     get_history(true, fill_table);
   });