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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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