Prevent paste from empty clipboard throwing an error

Signed-off-by: Pasi Kallinen <pasi.kallinen@pttk.fi>

diff --git a/Open-ILS/xul/staff_client/chrome/content/util/clipboard.js b/Open-ILS/xul/staff_client/chrome/content/util/clipboard.js
index 75d225a..d180611 100644 (file)
--- a/Open-ILS/xul/staff_client/chrome/content/util/clipboard.js
+++ b/Open-ILS/xul/staff_client/chrome/content/util/clipboard.js
@@ -57,7 +57,9 @@ util.clipboard.paste = function() {
         trans.addDataFlavor("text/unicode"); 
         cb.getData(trans, cb.kGlobalClipboard);
         var str = {}; var strLength = {};
-        trans.getTransferData("text/unicode",str,strLength);
+        try {
+            trans.getTransferData("text/unicode",str,strLength);
+        } catch(e) { /* clipboard is empty */ return; }
         if (str) str = str.value.QueryInterface(Components.interfaces.nsISupportsString);
         var clip; if (str) clip = str.data.substring(0, strLength.value / 2);
         n.value = v.substring(0, start) + clip + v.substring(end, v.length);