8000 bpo-32631: IDLE: Enable zzdummy example extension module (GH-14491) · python/cpython@e40e2a2 · GitHub
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bpo-32631: IDLE: Enable zzdummy example extension module (GH-14491)
Make menu items work with formatter, add docstrings, add 100% tests. Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>
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‎Lib/idlelib/NEWS.txt

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@@ -3,6 +3,9 @@ Released on 2021-10-04?
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======================================
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bpo-32631: Finish zzdummy example extension module: make menu entries
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work; add docstrings and tests with 100% coverage.
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bpo-42508: Keep IDLE running on macOS. Remove obsolete workaround
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that prevented running files with shortcuts when using new universal2
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installers built on macOS 11.

‎Lib/idlelib/configdialog.py

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@@ -2316,7 +2316,15 @@ def detach(self):
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Shell Preferences: Auto-Squeeze Min. Lines is the minimum number of lines
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of output to automatically "squeeze".
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'''
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''',
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'Extensions': '''
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ZzDummy: This extension is provided as an example for how to create and
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use an extension. Enable indicates whether the extension is active or
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not; likewise enable_editor and enable_shell indicate which windows it
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will be active on. For this extension, z-text is the text that will be
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inserted at or removed from the beginning of the lines of selected text,
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or the current line if no selection.
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''',
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}
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‎Lib/idlelib/extend.txt

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@@ -28,8 +28,8 @@ variables:
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(There are a few more, but they are rarely useful.)
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The extension class must not directly bind Window Manager (e.g. X) events.
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Rather, it must define one or more virtual events, e.g. <<zoom-height>>, and
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corresponding methods, e.g. zoom_height_event(). The virtual events will be
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Rather, it must define one or more virtual events, e.g. <<z-in>>, and
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corresponding methods, e.g. z_in_event(). The virtual events will be
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bound to the corresponding methods, and Window Manager events can then be bound
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to the virtual events. (This indirection is done so that the key bindings can
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easily be changed, and so that other sources of virtual events can exist, such
@@ -54,21 +54,21 @@ Extensions are not required to define menu entries for all the events they
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implement. (They are also not required to create keybindings, but in that
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case there must be empty bindings in cofig-extensions.def)
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Here is a complete example:
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Here is a partial example from zzdummy.py:
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class ZoomHeight:
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class ZzDummy:
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menudefs = [
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('edit', [
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None, # Separator
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('_Zoom Height', '<<zoom-height>>'),
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])
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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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self.editwin = editwin
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def zoom_height_event(self, event):
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def z_in_event(self, event=None):
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"...Do what you want here..."
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The final piece of the puzzle is the file "config-extensions.def", which is

‎Lib/idlelib/idle_test/test_zzdummy.py

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@@ -0,0 +1,152 @@
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"Test zzdummy, coverage 100%."
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from idlelib import zzdummy
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import unittest
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from test.support import requires
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from tkinter import Tk, Text
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from unittest import mock
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from idlelib import config
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from idlelib import editor
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from idlelib import format
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usercfg = zzdummy.idleConf.userCfg
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testcfg = {
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'main': config.IdleUserConfParser(''),
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'highlight': config.IdleUserConfParser(''),
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'keys': config.IdleUserConfParser(''),
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'extensions': config.IdleUserConfParser(''),
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}
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code_sample = """\
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class C1():
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# Class comment.
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def __init__(self, a, b):
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self.a = a
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self.b = b
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"""
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class DummyEditwin:
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get_selection_indices = editor.EditorWindow.get_selection_indices
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def __init__(self, root, text):
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self.root = root
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self.top = root
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self.text = text
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self.fregion = format.FormatRegion(self)
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self.text.undo_block_start = mock.Mock()
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self.text.undo_block_stop = mock.Mock()
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class ZZDummyTest(unittest.TestCase):
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@classmethod
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def setUpClass(cls):
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requires('gui')
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root = cls.root = Tk()
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root.withdraw()
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text = cls.text = Text(cls.root)
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cls.editor = DummyEditwin(root, text)
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zzdummy.idleConf.userCfg = testcfg
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@classmethod
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def tearDownClass(cls):
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zzdummy.idleConf.userCfg = usercfg
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del cls.editor, cls.text
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cls.root.update_idletasks()
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for id in cls.root.tk.call('after', 'info'):
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cls.root.after_cancel(id) # Need for EditorWindow.
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cls.root.destroy()
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del cls.root
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def setUp(self):
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text = self.text
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text.insert('1.0', code_sample)
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text.undo_block_start.reset_mock()
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text.undo_block_stop.reset_mock()
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zz = self.zz = zzdummy.ZzDummy(self.editor)
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zzdummy.ZzDummy.ztext = '# ignore #'
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def tearDown(self):
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self.text.delete('1.0', 'end')
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del self.zz
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def checklines(self, text, value):
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# Verify that there are lines being checked.
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end_line = int(float(text.index('end')))
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# Check each line for the starting text.
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actual = []
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for line in range(1, end_line):
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txt = text.get(f'{line}.0', f'{line}.end')
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actual.append(txt.startswith(value))
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return actual
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def test_init(self):
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zz = self.zz
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self.assertEqual(zz.editwin, self.editor)
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self.assertEqual(zz.text, self.editor.text)
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def test_reload(self):
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self.assertEqual(self.zz.ztext, '# ignore #')
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testcfg['extensions'].SetOption('ZzDummy', 'z-text', 'spam')
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zzdummy.ZzDummy.reload()
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self.assertEqual(self.zz.ztext, 'spam')
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def test_z_in_event(self):
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eq = self.assertEqual
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zz = self.zz
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text = zz.text
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eq(self.zz.ztext, '# ignore #')
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# No lines have the leading text.
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expected = [False, False, False, False, False, False, False]
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actual = self.checklines(text, zz.ztext)
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eq(expected, actual)
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text.tag_add('sel', '2.0', '4.end')
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eq(zz.z_in_event(), 'break')
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expected = [False, True, True, True, False, False, False]
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actual = self.checklines(text, zz.ztext)
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eq(expected, actual)
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text.undo_block_start.assert_called_once()
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text.undo_block_stop.assert_called_once()
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def test_z_out_event(self):
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eq = self.assertEqual
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zz = self.zz
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text = zz.text
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eq(self.zz.ztext, '# ignore #')
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# Prepend text.
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text.tag_add('sel', '2.0', '5.end')
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zz.z_in_event()
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text.undo_block_start.reset_mock()
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text.undo_block_stop.reset_mock()
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# Select a few lines to remove text.
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text.tag_remove('sel', '1.0', 'end')
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text.tag_add('sel', '3.0', '4.end')
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eq(zz.z_out_event(), 'break')
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expected = [False, True, False, False, True, False, False]
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actual = self.checklines(text, zz.ztext)
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eq(expected, actual)
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text.undo_block_start.assert_called_once()
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text.undo_block_stop.assert_called_once()
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def test_roundtrip(self):
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# Insert and remove to all code should give back original text.
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zz = self.zz
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text = zz.text
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text.tag_add('sel', '1.0', 'end-1c')
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zz.z_in_event()
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zz.z_out_event()
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self.assertEqual(text.get('1.0', 'end-1c'), code_sample)
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if __name__ == '__main__':
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unittest.main(verbosity=2)

‎Lib/idlelib/zzdummy.py

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@@ -1,42 +1,73 @@
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"Example extension, also used for testing."
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"""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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5-
ztext = idleConf.GetOption('extensions', 'ZzDummy', 'z-text')
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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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10-
## 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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# 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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z_in = False
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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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25-
def z_in_event(self, event):
48+
@format_selection
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def z_in_event(self, line):
50+
"""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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text = self.text
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text.undo_block_start()
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for line in range(1, text.index('end')):
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text.insert('%d.0', ztext)
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text.undo_block_stop()
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return "break"
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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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35-
def z_out_event(self, event): pass
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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',
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## verbosity=2, exit=False)
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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)

‎Misc/NEWS.d/next/IDLE/2019-06-30-20-31-09.bpo-32631.e7_4BG.rst

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Finish zzdummy example extension module: make menu entries work;
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add docstrings and tests with 100% coverage.

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