Call resize handler in intervals to prevent lags and double onresize calls in Chrome (#1489005)

CHANGELOG

@@ -1,6 +1,7 @@
 CHANGELOG Roundcube Webmail
 ===========================
 
+- Call resize handler in intervals to prevent lags and double onresize calls in Chrome (#1489005)
 - Fix javascript error in IE9 when loading form with placeholders into an iframe (#1489008)
 - Fix handling of some conditional comment tags in HTML message (#1489004)
 - Add rel="noreferrer" for links in displayed messages (#1484686)

skins/larry/ui.js

@@ -287,8 +287,15 @@ function rcube_mail_ui()
   /**
    * Update UI on window resize
    */
-  function resize()
+  function resize(e)
   {
+    // resize in intervals to prevent lags and double onresize calls in Chrome (#1489005)
+    var interval = e ? 10 : 0;
+
+    if (rcmail.resize_timeout)
+      window.clearTimeout(rcmail.resize_timeout);
+
+    rcmail.resize_timeout = window.setTimeout(function() {
       if (rcmail.env.task == 'mail') {
         if (rcmail.env.action == 'show' || rcmail.env.action == 'preview')
           layout_messageview();
@@ -309,6 +316,7 @@ function rcube_mail_ui()
           body[action]('floatingbuttons');
         }
       });
+    }, interval);
   }
 
   /**