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gh-94521: Copy or cut current line while no selection by znsoooo · Pull Request #145134 · python/cpython · GitHub

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gh-94521: Copy or cut current line while no selection #145134

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gh-94521: Copy or cut current line while no selection #145134

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d7583af
Feat: Copy or cut current line while no selection
znsoooo Feb 23, 2026
4c9463f
Docs: Add news
znsoooo Feb 23, 2026
c4f7f95
Merge branch 'upstream' into dev-copy-current-line-when-no-select
znsoooo Feb 23, 2026
1dd5054
Merge tag 'ok' into dev-copy-current-line-when-no-select
znsoooo Oct 7, 2026
d6b4102
gh-94521: Copy/cut current line without selecting it
znsoooo Oct 7, 2026
b930b29
Merge branch 'upstream' into dev-copy-current-line-when-no-select
znsoooo Oct 7, 2026
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gh-94521: Copy/cut current line without selecting it
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znsoooo committed Oct 7, 2026
commit d6b41029aba0bf18a3fc0af41d36458ef7c41859
4 changes: 4 additions & 0 deletions Doc/library/idle.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -125,9 +125,11 @@ Select All

Cut
Copy selection into the system-wide clipboard; then delete the selection.
If there is no selection, cut the current line instead.

Copy
Copy selection into the system-wide clipboard.
If there is no selection, copy the current line instead.

Paste
Insert contents of the system-wide clipboard into the current window.
Expand Down Expand Up @@ -371,9 +373,11 @@ Context menus have the standard clipboard functions also on the Edit menu.

Cut
Copy selection into the system-wide clipboard; then delete the selection.
If there is no selection, cut the current line instead.

Copy
Copy selection into the system-wide clipboard.
If there is no selection, copy the current line instead.

Paste
Insert contents of the system-wide clipboard into the current window.
Expand Down
16 changes: 10 additions & 6 deletions Lib/idlelib/editor.py
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Original file line number Diff line number Diff line change
Expand Up @@ -609,16 +609,20 @@ def python_docs(self, event=None):

def cut(self,event):
if not self.text.tag_ranges('sel'):
self.text.tag_add('sel', 'insert linestart', 'insert+1l linestart')
self.text.mark_set('insert', 'insert linestart')
self.text.event_generate("<<Cut>>")
self.copy(event)
self.text.delete('insert', 'insert+1l')
else:
self.text.event_generate("<<Cut>>")
return "break"

def copy(self,event):
if not self.text.tag_ranges("sel"):
self.text.tag_add('sel', 'insert linestart', 'insert+1l linestart')
if not self.text.tag_ranges('sel'):
self.text.mark_set('insert', 'insert linestart')
self.text.event_generate("<<Copy>>")
line = self.text.get('insert', 'insert+1l')
self.text.clipboard_clear()
self.text.clipboard_append(line)
else:
self.text.event_generate("<<Copy>>")
return "break"

def paste(self,event):
Expand Down
46 changes: 46 additions & 0 deletions Lib/idlelib/idle_test/test_editor.py
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Expand Up @@ -237,5 +237,51 @@ def test_rclick(self):
pass


class CopyCutLineTest(unittest.TestCase):

@classmethod
def setUpClass(cls):
requires('gui')
cls.root = Tk()
cls.root.withdraw()
cls.window = Editor(root=cls.root)

@classmethod
def tearDownClass(cls):
cls.root.destroy()
del cls.root

def test_copy_no_selection(self):
eq = self.assertEqual
text = self.window.text

insert(text, 'hello\nworld')
text.mark_set('insert', '1.2')
self.window.copy(event=None)

# Copy current line without being selected
eq(text.clipboard_get(), 'hello\n')
eq(text.tag_ranges('sel'), ())

# Cursor move to start of the line
eq(text.index('insert'), '1.0')

def test_cut_no_selection(self):
eq = self.assertEqual
text = self.window.text

insert(text, 'hello\nworld')
text.mark_set('insert', '1.2')
self.window.cut(event=None)

# Copy current line and remove it
eq(text.clipboard_get(), 'hello\n')
eq(text.get('1.0', 'end'), 'world\n')
eq(text.tag_ranges('sel'), ())

# Cursor move to start of the line
eq(text.index('insert'), '1.0')


if __name__ == '__main__':
unittest.main(verbosity=2)
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