Bail out on empty copy

1 files changed, 14 insertions, 3 deletions

diff --git a/vixf.py3 b/vixf.py3
index d9e791c..60ff7ae 100644
--- a/vixf.py3
+++ b/vixf.py3
@@ -10,6 +10,7 @@ text.
 import locale
 import os
 import subprocess
+import sys
 import tempfile
 import time
 
@@ -34,9 +35,19 @@ with keyboard.pressed(Key.ctrl):
 with keyboard.pressed(Key.ctrl):
     keyboard.type('c')
 
+# Read clipboard
+content_before = pyperclip.paste()
+
+# Stop here (error condition) if there's nothing in the clipboard
+if len(content_before) == 0:
+    print(
+        f'{SELF}: Nothing to edit.  Did the selection work?',
+        file=sys.stderr,
+    )
+    sys.exit(1)
 
 with tempfile.NamedTemporaryFile(mode='w', delete_on_close=False) as tf:
-    tf.write(pyperclip.paste())
+    tf.write(content_before)
     tf.close()
 
     env = os.environ
@@ -59,9 +70,9 @@ with tempfile.NamedTemporaryFile(mode='w', delete_on_close=False) as tf:
 
     encoding = locale.getpreferredencoding()
     with open(tf.name, mode='r', encoding=encoding) as tfr:
-        content = tfr.read()
+        content_after = tfr.read()
 
-pyperclip.copy(content)
+pyperclip.copy(content_after)
 
 time.sleep(SLEEP)