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"""Example extension, also used for testing.
See extend.txt for more details on creating an extension.
See config-extension.def for configuring an extension.
"""
from idlelib.config import idleConf
from functools import wraps
def format_selection(format_line):
"Apply a formatting function to all of the selected lines."
@wraps(format_line)
def apply(self, event=None):
head, tail, chars, lines = self.formatter.get_region()
for pos in range(len(lines) - 1):
line = lines[pos]
lines[pos] = format_line(self, line)
self.formatter.set_region(head, tail, chars, lines)
return 'break'
return apply
class ZzDummy:
"""Prepend or remove initial text from selected lines."""
# Extend the format menu.
menudefs = [
('format', [
('Z in', '<<z-in>>'),
('Z out', '<<z-out>>'),
] )
]
def __init__(self, editwin):
"Initialize the settings for this extension."
self.editwin = editwin
self.text = editwin.text
self.formatter = editwin.fregion
@classmethod
def reload(cls):
"Load class variables from config."
cls.ztext = idleConf.GetOption('extensions', 'ZzDummy', 'z-text')
@format_selection
def z_in_event(self, line):
"""Insert text at the beginning of each selected line.
This is bound to the <<z-in>> virtual event when the extensions
are loaded.
"""
return f'{self.ztext}{line}'
@format_selection
def z_out_event(self, line):
"""Remove specific text from the beginning of each selected line.
This is bound to the <<z-out>> virtual event when the extensions
are loaded.
"""
zlength = 0 if not line.startswith(self.ztext) else len(self.ztext)
return line[zlength:]
ZzDummy.reload()
if __name__ == "__main__":
import unittest
unittest.main('idlelib.idle_test.test_zzdummy', verbosity=2, exit=False)
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