From a99da9be6985993b9fb9c14047c7a5429dde72b8 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 21 Jul 2016 08:44:39 +0530
Subject: [PATCH] Edit metadata dialog: Fix pasting ISBN from clipboard not
 stripping garbage characters after a valid ISBN. Fixes #1604956 [paste ISBN
 button regular expression](https://bugs.launchpad.net/calibre/+bug/1604956)

---
 src/calibre/gui2/metadata/basic_widgets.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/calibre/gui2/metadata/basic_widgets.py b/src/calibre/gui2/metadata/basic_widgets.py
index 323fd55953..6ebc5851e6 100644
--- a/src/calibre/gui2/metadata/basic_widgets.py
+++ b/src/calibre/gui2/metadata/basic_widgets.py
@@ -1523,9 +1523,11 @@ class IdentifiersEdit(QLineEdit, ToMetadataMixin):
             text = d.text()
             if not text:
                 return
-        vals = self.current_val
-        vals['isbn'] = text
-        self.current_val = vals
+        text = check_isbn(text)
+        if text:
+            vals = self.current_val
+            vals['isbn'] = text
+            self.current_val = vals
 
 # }}}