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