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'Provides "Strip trailing whitespace" under the "Format" menu.'
class Rstrip:
def __init__(self, editwin):
self.editwin = editwin
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')))
for cur in range(1, end_line):
txt = text.get('%i.0' % cur, '%i.end' % cur)
raw = len(txt)
cut = len(txt.rstrip())
# Since text.delete() marks file as changed, even if not,
# only call it when needed to actually delete something.
if cut < raw:
text.delete('%i.%i' % (cur, cut), '%i.end' % cur)
undo.undo_block_stop()
if __name__ == "__main__":
from unittest import main
main('idlelib.idle_test.test_rstrip', verbosity=2,)