PR: Add multi-cursor support to the Editor

spyder/config/main.py

@@ -245,6 +245,7 @@
               'check_eol_chars': True,
               'convert_eol_on_save': False,
               'convert_eol_on_save_to': 'LF',
+              'multicursor_support': True,
               'tab_always_indent': False,
               'intelligent_backspace': True,
               'automatic_completions': True,
@@ -429,10 +430,8 @@
               'find_replace/hide find and replace': "Escape",
               # -- Editor --
               'editor/code completion': CTRL+'+Space',
-              'editor/duplicate line up': (
-                  "Ctrl+Alt+Up" if WIN else "Shift+Alt+Up"),
-              'editor/duplicate line down': (
-                  "Ctrl+Alt+Down" if WIN else "Shift+Alt+Down"),
+              'editor/duplicate line up': CTRL + "+Alt+PgUp",
+              'editor/duplicate line down': CTRL + "+Alt+PgDown",
               'editor/delete line': 'Ctrl+D',
               'editor/transform to uppercase': 'Ctrl+Shift+U',
               'editor/transform to lowercase': 'Ctrl+U',
@@ -513,6 +512,9 @@
               'editor/enter array table': "Ctrl+M",
               'editor/run cell in debugger': 'Alt+Shift+Return',
               'editor/run selection in debugger': CTRL + '+F9',
+              'editor/add cursor up': 'Alt+Shift+Up',
+              'editor/add cursor down': 'Alt+Shift+Down',
+              'editor/clear extra cursors': 'Esc',
               # -- Internal console --
               'internal_console/inspect current object': "Ctrl+I",
               'internal_console/clear shell': "Ctrl+L",
@@ -676,4 +678,4 @@
 #    or if you want to *rename* options, then you need to do a MAJOR update in
 #    version, e.g. from 3.0.0 to 4.0.0
 # 3. You don't need to touch this value if you're just adding a new option
-CONF_VERSION = '85.0.0'
+CONF_VERSION = '85.1.0'

spyder/plugins/editor/confpage.py

@@ -62,7 +62,7 @@ def get_icon(self):
     def setup_page(self):
         newcb = self.create_checkbox
 
-        # --- Display tab ---
+        # ---- Display tab
         showtabbar_box = newcb(_("Show tab bar"), 'show_tab_bar')
         showclassfuncdropdown_box = newcb(
                 _("Show selector for classes and functions"),
@@ -130,7 +130,7 @@ def setup_page(self):
         other_layout.addWidget(scroll_past_end_box)
         other_group.setLayout(other_layout)
 
-        # --- Source code tab ---
+        # ---- Source code tab
         closepar_box = newcb(
             _("Automatic insertion of parentheses, braces and brackets"),
             'close_parentheses')
@@ -242,7 +242,7 @@ def enable_tabwidth_spin(index):
         indentation_layout.addWidget(tab_mode_box)
         indentation_group.setLayout(indentation_layout)
 
-        # --- Advanced tab ---
+        # ---- Advanced tab
         # -- Templates
         templates_group = QGroupBox(_('Templates'))
         template_btn = self.create_button(
@@ -361,6 +361,23 @@ def enable_tabwidth_spin(index):
         eol_layout.addLayout(eol_on_save_layout)
         eol_group.setLayout(eol_layout)
 
+        # -- Multi-cursor
+        multicursor_group = QGroupBox(_("Multi-Cursor"))
+        multicursor_label = QLabel(
+            _("Enable adding multiple cursors for simultaneous editing. "
+              "Additional cursors are added and removed using the Ctrl-Alt "
+              "click shortcut. A column of cursors can be added using the "
+              "Ctrl-Alt-Shift click shortcut."))
+        multicursor_label.setWordWrap(True)
+        multicursor_box = newcb(
+            _("Enable Multi-Cursor "),
+            'multicursor_support')
+
+        multicursor_layout = QVBoxLayout()
+        multicursor_layout.addWidget(multicursor_label)
+        multicursor_layout.addWidget(multicursor_box)
+        multicursor_group.setLayout(multicursor_layout)
+
         # --- Tabs ---
         self.create_tab(
             _("Interface"),
@@ -372,7 +389,7 @@ def enable_tabwidth_spin(index):
         self.create_tab(
             _("Advanced settings"),
             [templates_group, autosave_group, docstring_group,
-             annotations_group, eol_group]
+             annotations_group, eol_group, multicursor_group]
         )
 
     @on_conf_change(

spyder/plugins/editor/panels/codefolding.py

@@ -803,7 +803,7 @@ def expand_all(self):
         """Expands all fold triggers."""
         block = self.editor.document().firstBlock()
         while block.isValid():
-            line_number = block.BlockNumber()
+            line_number = block.blockNumber()
             if line_number in self.folding_regions:
                 end_line = self.folding_regions[line_number]
                 self.unfold_region(block, line_number, end_line)

spyder/plugins/editor/panels/scrollflag.py

@@ -51,6 +51,7 @@ def __init__(self):
         self._unit_testing = False
         self._range_indicator_is_visible = False
         self._alt_key_is_down = False
+        self._ctrl_key_is_down = False
 
         self._slider_range_color = QColor(Qt.gray)
         self._slider_range_color.setAlphaF(.85)
@@ -130,7 +131,7 @@ def update_flags(self):
             'breakpoint': [],
         }
 
-        # Run this computation in a different thread to prevent freezing 
+        # Run this computation in a different thread to prevent freezing
         # the interface
         if not self._update_flags_thread.isRunning():
             self._update_flags_thread.start()
@@ -280,9 +281,12 @@ def paintEvent(self, event):
 
         # Paint the slider range
         if not self._unit_testing:
-            alt = QApplication.queryKeyboardModifiers() & Qt.AltModifier
+            modifiers = QApplication.queryKeyboardModifiers()
+            alt = modifiers & Qt.KeyboardModifier.AltModifier
+            ctrl = modifiers & Qt.KeyboardModifier.ControlModifier
         else:
             alt = self._alt_key_is_down
+            ctrl = self._ctrl_key_is_down
 
         if self.slider:
             cursor_pos = self.mapFromGlobal(QCursor().pos())
@@ -293,7 +297,7 @@ def paintEvent(self, event):
             # determined if the cursor is over the editor or the flag scrollbar
             # because the later gives a wrong result when a mouse button
             # is pressed.
-            if is_over_self or (alt and is_over_editor):
+            if is_over_self or (alt and not ctrl and is_over_editor):
                 painter.setPen(self._slider_range_color)
                 painter.setBrush(self._slider_range_brush)
                 x, y, width, height = self.make_slider_range(
@@ -324,15 +328,21 @@ def mousePressEvent(self, event):
 
     def keyReleaseEvent(self, event):
         """Override Qt method."""
-        if event.key() == Qt.Key_Alt:
+        if event.key() == Qt.Key.Key_Alt:
             self._alt_key_is_down = False
             self.update()
+        elif event.key() == Qt.Key.Key_Control:
+            self._ctrl_key_is_down = False
+            self.update()
 
     def keyPressEvent(self, event):
         """Override Qt method"""
         if event.key() == Qt.Key_Alt:
             self._alt_key_is_down = True
             self.update()
+        elif event.key() == Qt.Key.Key_Control:
+            self._ctrl_key_is_down = True
+            self.update()
 
     def get_vertical_offset(self):
         """

spyder/plugins/editor/tests/test_plugin.py

@@ -294,7 +294,9 @@ def test_go_to_prev_next_cursor_position(editor_plugin, python_files):
     for history, expected_history in zip(main_widget.cursor_undo_history,
                                          expected_cursor_undo_history):
         assert history[0] == expected_history[0]
-        assert history[1].position() == expected_history[1]
+        # history[1] is a tuple of editor.all_cursor(s)
+        # only a single cursor is expected for this test
+        assert history[1][0].position() == expected_history[1]
 
     # Navigate to previous and next cursor positions.
 
@@ -318,11 +320,11 @@ def test_go_to_prev_next_cursor_position(editor_plugin, python_files):
     for history, expected_history in zip(main_widget.cursor_undo_history,
                                          expected_cursor_undo_history[:1]):
         assert history[0] == expected_history[0]
-        assert history[1].position() == expected_history[1]
+        assert history[1][0].position() == expected_history[1]
     for history, expected_history in zip(main_widget.cursor_redo_history,
                                          expected_cursor_undo_history[:0:-1]):
         assert history[0] == expected_history[0]
-        assert history[1].position() == expected_history[1]
+        assert history[1][0].position() == expected_history[1]
 
     # So we are now expected to be at index 0 in the cursor position history.
     # From there, we go to the fourth file.
@@ -337,7 +339,7 @@ def test_go_to_prev_next_cursor_position(editor_plugin, python_files):
     for history, expected_history in zip(main_widget.cursor_undo_history,
                                          expected_cursor_undo_history):
         assert history[0] == expected_history[0]
-        assert history[1].position() == expected_history[1]
+        assert history[1][0].position() == expected_history[1]
     assert main_widget.cursor_redo_history == []