lightning: paste sample using clipboard

gui/kivy/uix/dialogs/lightning_payer.py

@@ -28,8 +28,8 @@ Builder.load_string('''
                 text: _('Paste')
                 on_release: s.do_paste()
             Button:
-                text: _('Paste sample')
-                on_release: s.do_paste_sample()
+                text: _('Paste using xclip')
+                on_release: s.do_paste_xclip()
             Button:
                 text: _('Clear')
                 on_release: s.do_clear()
@@ -60,8 +60,10 @@ class LightningPayerDialog(Factory.Popup):
     def dismiss(self, *args, **kwargs):
         super(LightningPayerDialog, self).dismiss(*args, **kwargs)
         self.app.wallet.network.lightningrpc.setConsole(None)
-    def do_paste_sample(self):
-        self.invoice_data = "lnbc1pvjluezpp5qqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqqqsyqcyq5rqwzqfqypqdpl2pkx2ctnv5sxxmmwwd5kgetjypeh2ursdae8g6twvus8g6rfwvs8qun0dfjkxaq8rkx3yf5tcsyz3d73gafnh3cax9rn449d9p5uxz9ezhhypd0elx87sjle52x86fux2ypatgddc6k63n7erqz25le42c4u4ecky03ylcqca784w"
+    def do_paste_xclip(self):
+        import subprocess
+        proc = subprocess.run(["xclip","-sel","clipboard","-o"], stdout=subprocess.PIPE)
+        self.invoice_data = proc.stdout.decode("ascii")
     def do_paste(self):
         contents = self.app._clipboard.paste()
         if not contents: