Fix plugin lifecycle, tabs cleanup, and add auto-scroll to tabs

- Fix unload() method naming in nanoesq_temp_buffer plugin
- Wrap tabs_widget in ScrolledWindow/Viewport for proper scrolling
- Add auto-scroll to center when switching/adding tabs
- Return manifest_meta in manifest_manager for manual plugins
- Refactor remove_plugin() to properly clean up all manifest lists
- Fix widget references in plugins_ui for proper removal

plugins/code/commands/nanoesq_temp_buffer/plugin.py

@@ -23,7 +23,7 @@ class Plugin(PluginCode):
     def load(self):
         self._manage_signals("register_command")
 
-    def load(self):
+    def unload(self):
         self._manage_signals("unregister_command")
 
     def _manage_signals(self, action: str):

plugins/code/ui/tabs_bar/plugin.py

@@ -1,6 +1,9 @@
 # Python imports
 
 # Lib imports
+import gi
+
+from gi.repository import Gtk
 
 # Application imports
 from libs.event_factory import Event_Factory, Code_Event_Types
@@ -25,8 +28,19 @@ class Plugin(PluginCode):
 
         self.register_controller("tabs", self.tabs_controller)
 
-        code_container.add( self.tabs_controller.tabs_widget )
-        code_container.reorder_child(self.tabs_controller.tabs_widget, 0)
+        scrolled_win = Gtk.ScrolledWindow()
+        viewport     = Gtk.Viewport()
+
+        scrolled_win.set_overlay_scrolling(False)
+        scrolled_win.set_size_request(-1, 50)
+
+        viewport.add( self.tabs_controller.tabs_widget )
+        scrolled_win.add( viewport )
+        code_container.add( scrolled_win )
+        code_container.reorder_child(scrolled_win, 0)
+
+        viewport.show()
+        scrolled_win.show()
 
         event = Event_Factory.create_event("get_files")
         self.emit_to("files", event)
@@ -36,7 +50,14 @@ class Plugin(PluginCode):
     def unload(self):
         self.unregister_controller("tabs")
         self.tabs_controller.unload_tabs()
-        self.tabs_controller.tabs_widget.destroy()
+
+        tabs_widget  = self.tabs_controller.tabs_widget
+        viewport     = tabs_widget.get_parent()
+        scrolled_win = viewport.get_parent()
+
+        tabs_widget.destroy()
+        viewport.destroy()
+        scrolled_win.destroy()
 
         self.tabs_controller.tabs_widget = None
         self.tabs_controller             = None

plugins/code/ui/tabs_bar/tabs_widget.py

@@ -27,7 +27,7 @@ class TabsWidget(Gtk.Notebook):
 
 
     def _setup_styling(self):
-        self.set_scrollable(True)
+        ...
 
     def _setup_signals(self):
         self.connect("page-added", self._page_added)
@@ -67,6 +67,7 @@ class TabsWidget(Gtk.Notebook):
         )
 
         self.emit(event)
+        self._scroll_to_center(tab)
 
     def _bind_tab_menu(self, tab, page_widget):
         def do_context_menu(tab, eve, page_widget):
@@ -81,6 +82,21 @@ class TabsWidget(Gtk.Notebook):
                 page_widget
             )
 
+    def _scroll_to_center(self, tab):
+        scrolled_win = self.get_parent().get_parent()
+        alloc        = tab.get_allocation()
+        tab_x        = alloc.x
+        tab_width    = alloc.width
+        view_width   = scrolled_win.get_allocated_width()
+        target       = tab_x + tab_width / 2 - view_width / 2
+        adj          = scrolled_win.get_hadjustment()
+        lower        = adj.get_lower()
+        upper        = adj.get_upper()
+        page_size    = adj.get_page_size()
+        target       = max(lower, min(target, upper - page_size))
+
+        adj.set_value(target)
+
     def create_menu(self, page_widget) -> Gtk.Menu:
         context_menu  = Gtk.Menu()
         close_submenu = Gtk.Menu()
@@ -130,6 +146,7 @@ class TabsWidget(Gtk.Notebook):
                 self.page_num(page_widget)
             )
             self.handler_unblock(self.switch_page_id)
+            self._scroll_to_center(tab)
 
             break