bpo-37903: IDLE: add shell sidebar mouse interactions (GH-25708)

Left click and drag to select lines.  With selection, right click for context menu with copy and copy-with-prompts.
Also add copy-with-prompts to the text-box context menu.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Lib/idlelib/idle_test/test_autocomplete_w.py

@@ -15,7 +15,7 @@ class AutoCompleteWindowTest(unittest.TestCase):
         cls.root = Tk()
         cls.root.withdraw()
         cls.text = Text(cls.root)
-        cls.acw = acw.AutoCompleteWindow(cls.text)
+        cls.acw = acw.AutoCompleteWindow(cls.text, tags=None)
 
     @classmethod
     def tearDownClass(cls):

Lib/idlelib/idle_test/test_sidebar.py

@@ -270,7 +270,6 @@ class LineNumbersTest(unittest.TestCase):
 
         self.assertEqual(self.get_selection(), ('2.0', '3.0'))
 
-    @unittest.skip('test disabled')
     def simulate_drag(self, start_line, end_line):
         start_x, start_y = self.get_line_screen_position(start_line)
         end_x, end_y = self.get_line_screen_position(end_line)
@@ -704,6 +703,66 @@ class ShellSidebarTest(unittest.TestCase):
         yield
         self.assertIsNotNone(text.dlineinfo(text.index(f'{last_lineno}.0')))
 
+    @run_in_tk_mainloop
+    def test_copy(self):
+        sidebar = self.shell.shell_sidebar
+        text = self.shell.text
+
+        first_line = get_end_linenumber(text)
+
+        self.do_input(dedent('''\
+            if True:
+            print(1)
+
+            '''))
+        yield
+
+        text.tag_add('sel', f'{first_line}.0', 'end-1c')
+        selected_text = text.get('sel.first', 'sel.last')
+        self.assertTrue(selected_text.startswith('if True:\n'))
+        self.assertIn('\n1\n', selected_text)
+
+        text.event_generate('<<copy>>')
+        self.addCleanup(text.clipboard_clear)
+
+        copied_text = text.clipboard_get()
+        self.assertEqual(copied_text, selected_text)
+
+    @run_in_tk_mainloop
+    def test_copy_with_prompts(self):
+        sidebar = self.shell.shell_sidebar
+        text = self.shell.text
+
+        first_line = get_end_linenumber(text)
+        self.do_input(dedent('''\
+            if True:
+            print(1)
+
+            '''))
+        yield
+
+        text.tag_add('sel', f'{first_line}.3', 'end-1c')
+        selected_text = text.get('sel.first', 'sel.last')
+        self.assertTrue(selected_text.startswith('True:\n'))
+
+        selected_lines_text = text.get('sel.first linestart', 'sel.last')
+        selected_lines = selected_lines_text.split('\n')
+        # Expect a block of input, a single output line, and a new prompt
+        expected_prompts = \
+            ['>>>'] + ['...'] * (len(selected_lines) - 3) + [None, '>>>']
+        selected_text_with_prompts = '\n'.join(
+            line if prompt is None else prompt + ' ' + line
+            for prompt, line in zip(expected_prompts,
+                                    selected_lines,
+                                    strict=True)
+        ) + '\n'
+
+        text.event_generate('<<copy-with-prompts>>')
+        self.addCleanup(text.clipboard_clear)
+
+        copied_text = text.clipboard_get()
+        self.assertEqual(copied_text, selected_text_with_prompts)
+
 
 if __name__ == '__main__':
     unittest.main(verbosity=2)