Several errors on Ubuntu 24.4 with gedit 46.2

[FerdiScholten]

First Ubuntu 24.4 does not have gir1.2-webkit2-4.0 it has been upgraded to gir1.2-webkit2-4.1 causing the plugin to fail to load:

** (gedit:135002): WARNING **: 07:46:22.540: Error importing plugin 'markdown_preview':
Traceback (most recent call last):
File "/usr/lib/python3.12/importlib/init.py", line 90, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 995, in exec_module
File "", line 488, in _call_with_frames_removed
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/init.py", line 7, in
from .main_container import MdMainContainer
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 7, in
from .webview_manager import MdWebViewManager
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/webview_manager.py", line 5, in
gi.require_version('WebKit2', '4.0')
File "/usr/lib/python3/dist-packages/gi/init.py", line 125, in require_version
raise ValueError('Namespace %s not available for version %s' %
ValueError: Namespace WebKit2 not available for version 4.0

After changing the dependency to gir1.2-webkit2-4.1 the plugin loads but does not work, the panel remains empty and the following traceback is shown (probably same issue as #60):

Traceback (most recent call last):
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/init.py", line 93, in do_activate
self.preview.do_activate()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 52, in do_activate
self.build_preview_ui()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 207, in build_preview_ui
self.show_on_panel()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 463, in show_on_panel
self.panel.add_titled(self.preview_bar, 'markdown_preview', _("Markdown Preview"))
^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'PanelContainer' object has no attribute 'add_titled'
Traceback (most recent call last):
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/init.py", line 101, in do_update_state
self.preview.do_update_state()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 70, in do_update_state
elif self.panel.get_visible_child() != self.preview_bar:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'PanelContainer' object has no attribute 'get_visible_child'
Traceback (most recent call last):
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/init.py", line 104, in do_deactivate
self.preview.do_deactivate()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 86, in do_deactivate
self._delete_temp_file()
File "/usr/lib/x86_64-linux-gnu/gedit/plugins/markdown_preview/main_container.py", line 91, in _delete_temp_file
if self.temp_file_md.query_exists():
^^^^^^^^^^^^^^^^^
AttributeError: 'MdMainContainer' object has no attribute 'temp_file_md'