Issue 5150: Add rstrip() option to IDLE's format menu.
diff --git a/Lib/idlelib/RstripExtension.py b/Lib/idlelib/RstripExtension.py
new file mode 100644
index 0000000..19e35d4
--- /dev/null
+++ b/Lib/idlelib/RstripExtension.py
@@ -0,0 +1,29 @@
+'Provides "Strip trailing whitespace" under the "Format" menu.'
+
+__author__ = "Roger D. Serwy <roger.serwy at gmail.com>"
+
+class RstripExtension:
+
+ menudefs = [
+ ('format', [None,
+ ('Strip trailing whitespace', '<<do-rstrip>>'),
+ ]),]
+
+ def __init__(self, editwin):
+ self.editwin = editwin
+ self.editwin.text.bind("<<do-rstrip>>", self.do_rstrip)
+
+ def do_rstrip(self, event=None):
+
+ text = self.editwin.text
+ undo = self.editwin.undo
+
+ undo.undo_block_start()
+
+ end_line = int(float(text.index('end'))) + 1
+ for cur in range(1, end_line):
+ txt = text.get('%i.0' % cur, '%i.0 lineend' % cur)
+ cut = len(txt.rstrip())
+ text.delete('%i.%i' % (cur, cut), '%i.0 lineend' % cur)
+
+ undo.undo_block_stop()