feat(editor): introduce split pane manager plugin and refactor source view system

* address TODO item for split_pane_manager plugin and bound keys
* add split_pane_manager plugin with create/close split view commands
* move sibling focus/move commands from core into plugin system
* remove legacy toggle_source_view plugin
* redesign EditorsContainer to use simpler Box-based layout
* refactor source view API to return (scrolled_window, source_view)
* add source view lifecycle events (create/remove/removed)
* rename GetNewCommandSystemEvent → CreateCommandSystemEvent
* update CommandsController to support command system creation and cleanup
* ensure command systems are removed with their source views
* improve focus border handling across sibling chains
* update telescope integration for new source view structure
* clean up container imports and initialization logic
* remove old keybindings and align with new split pane workflow

plugins/code/commands/split_pane_manager/__init__.py

@@ -0,0 +1,3 @@
+"""
+    Pligin Module
+"""

plugins/code/commands/split_pane_manager/__main__.py

@@ -0,0 +1,3 @@
+"""
+    Pligin Package
+"""

plugins/code/commands/split_pane_manager/close_split_view.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('Gtk', '3.0')
+gi.require_version('GtkSource', '4')
+
+from gi.repository import Gtk
+from gi.repository import GtkSource
+
+# Application imports
+from libs.event_factory import Event_Factory, Code_Event_Types
+
+
+
+emit_to: callable = None
+
+def execute(
+    source_view,
+    char_str,
+    modkeys_states
+):
+    logger.debug("Command: Close Split Pane")
+
+    scrolled_win = source_view.get_parent()
+    pane         = scrolled_win.get_parent()
+
+    if not isinstance(pane, Gtk.Paned): return
+
+    container    = pane.get_parent()
+    source_view1 = pane.get_child1()
+    source_view2 = pane.get_child2()
+
+    if scrolled_win == source_view1:
+        remaining    = source_view2
+        closing_view = source_view
+    else:
+        remaining    = source_view1
+        closing_view = source_view
+
+    remaining_view = remaining.get_child()
+    left           = closing_view.sibling_left
+    right          = closing_view.sibling_right
+
+    if left:
+        left.sibling_right = right
+
+    if right:
+        right.sibling_left = left
+
+    pane.remove(source_view1)
+    pane.remove(source_view2)
+
+    container.remove(pane)
+    container.add(remaining)
+
+    event = Event_Factory.create_event(
+        "remove_source_view",
+        view = closing_view
+    )
+    emit_to("source_views", event)
+
+    remaining_view.grab_focus()

plugins/code/commands/split_pane_manager/create_split_view.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version("Gtk", "3.0")
+
+from gi.repository import Gtk
+
+# Application imports
+from libs.event_factory import Event_Factory, Code_Event_Types
+from libs.dto.states import SourceViewStates
+
+
+
+emit_to: callable = None
+
+def execute(
+    source_view1,
+    char_str,
+    modkeys_states
+):
+    logger.debug("Command: Split Pane")
+
+    scrolled_win1  = source_view1.get_parent()
+    container      = scrolled_win1.get_parent()
+    pane           = Gtk.Paned()
+    event          = Event_Factory.create_event(
+        "create_source_view",
+        state = SourceViewStates.INSERT
+    )
+    emit_to("source_views", event)
+
+    scrolled_win2,    \
+    source_view2      = event.response
+    old_sibling_right = None
+
+    if source_view1.sibling_right:
+        old_sibling_right = source_view1.sibling_right
+
+    source_view1.sibling_right = source_view2
+    if old_sibling_right:
+        old_sibling_right.sibling_left = source_view2
+        source_view2.sibling_right     = old_sibling_right
+
+    source_view2.sibling_left  = source_view1
+
+    pane.set_hexpand(True)
+    pane.set_vexpand(True)
+    pane.set_wide_handle(True)
+
+    container.remove(scrolled_win1)
+    pane.pack1( scrolled_win1, True, True )
+    pane.pack2( scrolled_win2, True, True )
+    container.add(pane)
+
+    pane.show_all()
+
+    is_control, is_shift, is_alt = modkeys_states
+    if is_control and is_shift:
+        pane.set_orientation(Gtk.Orientation.VERTICAL)
+    elif is_control:
+        pane.set_orientation(Gtk.Orientation.HORIZONTAL)
+
+    source_view2.grab_focus()
+    source_view2.command.exec("new_file")

plugins/code/commands/split_pane_manager/focus_left_sibling.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+
+# Application imports
+
+
+
+def execute(
+    view: GtkSource.View,
+    *args,
+    **kwargs
+):
+    logger.debug("Command: Focus Left Sibling")
+    if not view.sibling_left: return
+    view.sibling_left.grab_focus()

plugins/code/commands/split_pane_manager/focus_right_sibling.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    view: GtkSource.View,
+    *args,
+    **kwargs
+):
+    logger.debug("Command: Focus Right Sibling")
+    if not view.sibling_right: return
+    view.sibling_right.grab_focus()

plugins/code/commands/split_pane_manager/manifest.json

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+{
+    "name": "Split Pane Manager",
+    "author": "ITDominator",
+    "version": "0.0.1",
+    "support": "",
+    "requests": {}
+}

plugins/code/commands/split_pane_manager/move_to_left_sibling.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    view: GtkSource.View,
+    *args,
+    **kwargs
+):
+    logger.debug("Command: Move To Left Sibling")
+    if not view.sibling_left: return
+
+    buffer = view.get_buffer()
+    popped_file, next_file = view.command.get_swap_file(view)
+
+    view.sibling_left.set_buffer(buffer)
+    view.sibling_left.get_parent().show()
+    view.sibling_left.grab_focus()
+
+    if next_file:
+        view.set_buffer(next_file.buffer)
+    else:
+        view.command.exec("new_file")

plugins/code/commands/split_pane_manager/move_to_right_sibling.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    view: GtkSource.View,
+    *args,
+    **kwargs
+):
+    logger.debug("Command: Move To Right Sibling")
+    if not view.sibling_right: return
+
+    buffer = view.get_buffer()
+    popped_file, next_file = view.command.get_swap_file(view)
+
+    view.sibling_right.set_buffer(buffer)
+    view.sibling_right.get_parent().show()
+    view.sibling_right.grab_focus()
+
+    if next_file:
+        view.set_buffer(next_file.buffer)
+    else:
+        view.command.exec("new_file")

plugins/code/commands/split_pane_manager/plugin.py

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+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version("Gtk", "3.0")
+
+from gi.repository import Gtk
+
+# Application imports
+from plugins.plugin_types import PluginCode
+
+from libs.event_factory import Event_Factory, Code_Event_Types
+
+from . import create_split_view,    \
+              close_split_view,     \
+              focus_left_sibling,   \
+              focus_right_sibling,  \
+              move_to_left_sibling, \
+              move_to_right_sibling
+
+
+
+class Plugin(PluginCode):
+    def __init__(self):
+        super(Plugin, self).__init__()
+
+
+    def _controller_message(self, event: Code_Event_Types.CodeEvent):
+        ...
+
+    def load(self):
+        gemit_to = self.emit_to
+        self._manage_signals("register_command")
+
+    def unload(self):
+        self._manage_signals("unregister_command")
+
+    def _manage_signals(self, action: str):
+        _create_split_view         = create_split_view
+        _close_split_view          = close_split_view
+        _create_split_view.emit_to = self.emit_to
+        _close_split_view.emit_to  = self.emit_to
+
+        event = Event_Factory.create_event(action,
+            command_name = "create_split_view",
+            command      = _create_split_view,
+            binding_mode = "released",
+            binding      = ["<Control>\\", "<Shift><Control>|"]
+        )
+
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(action,
+            command_name = "close_split_view",
+            command      = _close_split_view,
+            binding_mode = "released",
+            binding      = "<Shift><Control>w"
+        )
+
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(action,
+            command_name = "focus_left_sibling",
+            command      = focus_left_sibling,
+            binding_mode = "released",
+            binding      = "<Control>Page_Up"
+        )
+
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(action,
+            command_name = "focus_right_sibling",
+            command      = focus_right_sibling,
+            binding_mode = "released",
+            binding      = "<Control>Page_Down"
+        )
+
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(action,
+            command_name = "move_to_left_sibling",
+            command      = move_to_left_sibling,
+            binding_mode = "released",
+            binding      = "<Control><Shift>Up"
+        )
+
+        self.emit_to("source_views", event)
+
+        event = Event_Factory.create_event(action,
+            command_name = "move_to_right_sibling",
+            command      = move_to_right_sibling,
+            binding_mode = "released",
+            binding      = "<Control><Shift>Down"
+        )
+
+        self.emit_to("source_views", event)
+
+    def run(self):
+        ...