Added code view widget and base command system; updated keybinding system

src/core/containers/footer_container.py

@@ -36,6 +36,5 @@ class FooterContainer(Gtk.Box):
     def _subscribe_to_events(self):
         ...
 
-
     def _load_widgets(self):
         ...

src/core/widgets/code/__init__.py

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

src/core/widgets/code/command_system.py

@@ -0,0 +1,29 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+from .commands import *
+
+
+
+class CommandSystem:
+    def __init__(self):
+        super(CommandSystem, self).__init__()
+
+        self.data: list = ()
+
+
+    def set_data(self, *args, **kwargs):
+        self.data = (args, kwargs)
+
+    def exec(self, command: str):
+        if not command in globals(): return
+
+        # method = getattr(self, command, None)
+        method       = globals()[command]
+        args, kwargs = self.data
+        if kwargs:
+            method.execute(*args, kwargs)
+        else:
+            method.execute(*args)

src/core/widgets/code/commands/__init__.py

@@ -0,0 +1,12 @@
+"""
+    Commands Package
+"""
+
+import os
+
+
+__all__ = [
+    command.replace(".py", "") for command in os.listdir(
+        os.path.dirname(__file__)
+    ) if "__init__" not in command
+]

src/core/widgets/code/commands/close_file.py

@@ -0,0 +1,23 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("Close File Command")
+    file   = editor.files.new()
+    buffer = editor.get_buffer()
+    editor.set_buffer(file.buffer)
+    
+    editor.files.remove_file(buffer)

src/core/widgets/code/commands/line_down.py

@@ -0,0 +1,19 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("Line Up Command")
+    editor.emit("move-lines", True)

src/core/widgets/code/commands/line_up.py

@@ -0,0 +1,19 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("Line Up Command")
+    editor.emit("move-lines", False)

src/core/widgets/code/commands/new_file.py

@@ -0,0 +1,26 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("New File Command")
+    file       = editor.files.new()
+    language   = editor.language_manager \
+                       .guess_language("file.txt", None)
+
+    file.buffer.set_language(language)
+    file.buffer.set_style_scheme(editor.syntax_theme)
+
+    editor.set_buffer(file.buffer)

src/core/widgets/code/commands/open_files.py

@@ -0,0 +1,36 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("Open File(s) Command")
+    gfiles = event_system.emit_and_await("open_files")
+    if not gfiles: return
+
+    size   = len(gfiles)
+    for i, gfile in enumerate(gfiles):
+        file = editor.files.new()
+        file.set_path(gfile)
+
+        language   = editor.language_manager \
+                           .guess_language(file.fname, None)
+        file.ftype = language
+        file.buffer.set_language(language)
+        file.buffer.set_style_scheme(editor.syntax_theme)
+
+        if i == (size - 1):
+            editor.set_buffer(file.buffer)
+    
+

src/core/widgets/code/commands/show_completion.py

@@ -0,0 +1,18 @@
+# Python imports
+
+# Lib imports
+import gi
+
+gi.require_version('GtkSource', '4')
+
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+def execute(
+    editor: GtkSource.View  = None,
+    buffer: GtkSource.Buffer= None
+):
+    logger.debug("Show Completion Command")

src/core/widgets/code/completion_manager.py

@@ -0,0 +1,61 @@
+# Python imports
+
+# Lib imports
+import gi
+from gi.repository import GLib
+
+# Application imports
+from .custom_completion_providers.lsp_completion_provider import LSPCompletionProvider
+
+
+
+class CompletionManager():
+    def __init__(self, completer):
+        super(CompletionManager, self).__init__()
+
+        self._completor    = completer
+        self._lsp_provider = LSPCompletionProvider()
+        self._timeout_id   = None
+
+
+    def request_completion(self):
+        if self._timeout_id:
+            GLib.source_remove(self._timeout_id)
+
+        self._timeout_id = GLib.timeout_add(
+            1000,
+            self._process_request_completion
+        )
+
+    def _process_request_completion(self):
+        print('hello')
+
+        self._timeout_id = None
+        return False
+
+    def _do_completion(self):
+        if self._completor.get_providers():
+            self._mach_completion()
+        else:
+            self._start_completion()
+
+    def _mach_completion(self):
+        """
+            Note: Use IF providers were added to completion...
+        """
+        self._completion.match(
+            self._completion.create_context()
+        )
+
+    def _start_completion(self):
+        """
+            Note: Use IF NO providers have been added to completion...
+        """
+        self._completion.start(
+            [
+                self._lsp_provider
+            ],
+            self._completion.create_context()
+        )
+
+                                                                                                                                                  

src/core/widgets/code/custom_completion_providers/__init__.py

@@ -0,0 +1,3 @@
+"""
+    Custom Completion Providers Module
+"""

src/core/widgets/code/custom_completion_providers/example_completion_provider.py

@@ -0,0 +1,74 @@
+# Python imports
+import re
+
+# 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
+from gi.repository import GObject
+
+# Application imports
+
+
+
+class ExampleCompletionProvider(GObject.GObject, GtkSource.CompletionProvider):
+    """
+        This is a custom Completion Example Provider.
+        # NOTE: used information from here --> https://warroom.rsmus.com/do-that-auto-complete/
+    """
+    __gtype_name__ = 'CustomProvider'
+
+    def __init__(self):
+        GObject.Object.__init__(self)
+
+    def do_get_name(self):
+        """ Returns: a new string containing the name of the provider. """
+        return _('ExampleProvider')
+
+    def do_match(self, context):
+        """ Get whether the provider match the context of completion detailed in context. """
+        # NOTE: True for debugging but context needs to normally get checked for actual usage needs.
+        # TODO: Fix me
+        return True
+
+    def do_populate(self, context):
+        """
+            In this instance, it will do 2 things:
+                1) always provide Hello World! (Not ideal but an option so its in the example)
+                2) Utilizes the Gtk.TextIter from the TextBuffer to determine if there is a jinja
+                    example of '{{ custom.' if so it will provide you with the options of foo and bar.
+            If selected it will insert foo }} or bar }}, completing your syntax...
+
+            PLEASE NOTE the GtkTextIter Logic and regex are really rough and should be adjusted and tuned
+        """
+
+        proposals = [
+            # GtkSource.CompletionItem(label='Hello World!', text = 'Hello World!', icon = None, info = None) # NOTE: Always proposed...
+        ]
+
+        # Gtk Versions differ on get_iter responses...
+        end_iter = context.get_iter()
+        if not isinstance(end_iter, Gtk.TextIter):
+            _, end_iter = context.get_iter()
+
+        if end_iter:
+            buf = end_iter.get_buffer()
+            mov_iter = end_iter.copy()
+            if mov_iter.backward_search('{{', Gtk.TextSearchFlags.VISIBLE_ONLY):
+                mov_iter, _ = mov_iter.backward_search('{{', Gtk.TextSearchFlags.VISIBLE_ONLY)
+                left_text = buf.get_text(mov_iter, end_iter, True)
+            else:
+                left_text = ''
+
+            if re.match(r'.*\{\{\s*custom\.$', left_text):
+                proposals.append(
+                    GtkSource.CompletionItem(label='foo', text='foo }}')  # optionally proposed based on left search via regex
+                )
+                proposals.append(
+                    GtkSource.CompletionItem(label='bar', text='bar }}')  # optionally proposed based on left search via regex
+                )
+
+        context.add_proposals(self, proposals, True)

src/core/widgets/code/custom_completion_providers/lsp_completion_provider.py

@@ -0,0 +1,117 @@
+# 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
+from gi.repository import GObject
+
+# Application imports
+
+
+
+class LSPCompletionProvider(GObject.Object, GtkSource.CompletionProvider):
+    """
+        This code is an LSP code completion plugin for Newton.
+        # NOTE: Some code pulled/referenced from here --> https://github.com/isamert/gedi
+    """
+    __gtype_name__ = 'LSPProvider'
+
+    def __init__(self):
+        GObject.Object.__init__(self)
+
+        self._icon_theme = Gtk.IconTheme.get_default()
+
+        self.lsp_data = None
+
+
+    def do_get_name(self):
+        return "LSP Code Completion"
+
+    def get_iter_correctly(self, context):
+        return context.get_iter()[1] if isinstance(context.get_iter(), tuple) else context.get_iter()
+
+    def do_match(self, context):
+        return True
+
+    def do_get_priority(self):
+        return 1
+
+    def do_get_activation(self):
+        return GtkSource.CompletionActivation.USER_REQUESTED
+
+
+    def do_populate(self, context, items = []):
+        self.lsp_data 
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+    # def do_populate(self, context, items = []):
+    #     if hasattr(self._source_view, "completion_items"):
+    #         items = self._source_view.completion_items
+
+    #     proposals = []
+    #     for item in items:
+    #         proposals.append( self.create_completion_item(item) )
+
+    #     context.add_proposals(self, proposals, True)
+
+    # def get_icon_for_type(self, _type):
+    #     try:
+    #         return self._theme.load_icon(icon_names[_type.lower()], 16, 0)
+    #     except:
+    #         ...
+
+    #     try:
+    #         return self._theme.load_icon(Gtk.STOCK_ADD, 16, 0)
+    #     except:
+    #         ...
+
+    #     return None
+
+    # def create_completion_item(self, item):
+    #     comp_item = GtkSource.CompletionItem.new()
+    #     keys      = item.keys()
+    #     comp_item.set_label(item["label"])
+
+    #     if "insertText" in keys:
+    #         comp_item.set_text(item["insertText"])
+
+    #     if "additionalTextEdits" in keys:
+    #         comp_item.additionalTextEdits = item["additionalTextEdits"]
+
+    #     return comp_item
+
+
+    # def create_completion_item(self, item):
+    #     comp_item = GtkSource.CompletionItem.new()
+    #     comp_item.set_label(item.label)
+
+    #     if item.textEdit:
+    #         if isinstance(item.textEdit, dict):
+    #             comp_item.set_text(item.textEdit["newText"])
+    #         else:
+    #             comp_item.set_text(item.textEdit)
+    #     else:
+    #         comp_item.set_text(item.insertText)
+
+    #     comp_item.set_icon( self.get_icon_for_type(item.kind) )
+    #     comp_item.set_info(item.documentation)
+
+    #     return comp_item

src/core/widgets/code/custom_completion_providers/python_completion_provider.py

@@ -0,0 +1,108 @@
+# 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
+from gi.repository import GObject
+
+import jedi
+from jedi.api import Script
+
+# Application imports
+
+
+
+# FIXME: Find real icon names...
+icon_names = {
+    'import':    '',
+    'module':    '',
+    'class':     '',
+    'function':  '',
+    'statement': '',
+    'param':     ''
+}
+
+
+class Jedi:
+    def get_script(file, doc_text):
+        return Script(code = doc_text, path = file)
+
+
+class PythonCompletionProvider(GObject.Object, GtkSource.CompletionProvider):
+    """
+        This code is A python code completion plugin for Newton.
+        # NOTE: Some code pulled/referenced from here --> https://github.com/isamert/gedi
+    """
+    __gtype_name__ = 'PythonProvider'
+
+    def __init__(self, file):
+        GObject.Object.__init__(self)
+        self._theme = Gtk.IconTheme.get_default()
+        self._file  = file
+
+    def do_get_name(self):
+        return "Python Code Completion"
+
+    def get_iter_correctly(self, context):
+        return context.get_iter()[1] if isinstance(context.get_iter(), tuple) else context.get_iter()
+
+    def do_match(self, context):
+        iter = self.get_iter_correctly(context)
+        iter.backward_char()
+
+        buffer = iter.get_buffer()
+        if buffer.get_context_classes_at_iter(iter) != ['no-spell-check']:
+            return False
+
+        ch = iter.get_char()
+        # NOTE: Look to re-add or apply supprting logic to use spaces
+         # As is it slows down the editor in certain contexts...
+        # if not (ch in ('_', '.', ' ') or ch.isalnum()):
+        if not (ch in ('_', '.') or ch.isalnum()):
+            return False
+
+        return True
+
+    def do_get_priority(self):
+        return 1
+
+    def do_get_activation(self):
+        return GtkSource.CompletionActivation.INTERACTIVE
+
+    def do_populate(self, context):
+        # TODO: Maybe convert async?
+        it        = self.get_iter_correctly(context)
+        buffer    = it.get_buffer()
+        proposals = []
+
+        doc_text    = buffer.get_text(buffer.get_start_iter(), buffer.get_end_iter(), False)
+        iter_cursor = buffer.get_iter_at_mark(buffer.get_insert())
+        linenum     = iter_cursor.get_line() + 1
+        charnum     = iter_cursor.get_line_index()
+
+        def create_generator():
+            for completion in Jedi.get_script(self._file, doc_text).complete(line = linenum, column = None, fuzzy = False):
+                comp_item = GtkSource.CompletionItem.new()
+                comp_item.set_label(completion.name)
+                comp_item.set_text(completion.name)
+                comp_item.set_icon(self.get_icon_for_type(completion.type))
+                comp_item.set_info(completion.docstring())
+                yield comp_item
+
+        for item in create_generator():
+            proposals.append(item)
+
+        context.add_proposals(self, proposals, True)
+
+    def get_icon_for_type(self, _type):
+        try:
+            return self._theme.load_icon(icon_names[_type.lower()], 16, 0)
+        except:
+            try:
+                return self._theme.load_icon(Gtk.STOCK_ADD, 16, 0)
+            except:
+                return None

src/core/widgets/code/key_mapper.py

@@ -0,0 +1,127 @@
+# Python imports
+import copy
+import json
+
+# Lib imports
+import gi
+gi.require_version('Gdk', '3.0')
+from gi.repository import Gdk
+
+# Application imports
+
+
+
+class NoKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class CtrlKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class ShiftKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class AltKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class CtrlShiftKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class CtrlAltKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class AltShiftKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+class CtrlShiftAltKeyState:
+    held: dict     = {}
+    released: dict = {}
+
+
+
+class KeyMapper:
+    def __init__(self):
+        super(KeyMapper, self).__init__()
+
+        self.state   = NoKeyState
+        self._map    = {
+            NoKeyState:                                              NoKeyState(),
+            NoKeyState | CtrlKeyState :                              CtrlKeyState(),
+            NoKeyState | ShiftKeyState:                              ShiftKeyState(),
+            NoKeyState | AltKeyState  :                              AltKeyState(),
+            NoKeyState | CtrlKeyState | ShiftKeyState :              CtrlShiftKeyState(),
+            NoKeyState | CtrlKeyState | AltKeyState   :              CtrlAltKeyState(),
+            NoKeyState | AltKeyState  | ShiftKeyState :              AltShiftKeyState(),
+            NoKeyState | CtrlKeyState | ShiftKeyState | AltKeyState: CtrlShiftAltKeyState(),
+        }
+
+        self.load_map()
+
+
+    def load_map(self):
+        self.states   = copy.deepcopy(self._map)
+        bindings_file = f"{settings_manager.get_home_config_path()}/code-key-bindings.json"
+
+        with open(bindings_file, 'r') as f:
+            data = json.load(f)["keybindings"]
+
+            for command in data:
+                press_state = "held" if "held" in data[command] else "released"
+                keyname     = data[command][press_state]
+
+                state       = NoKeyState
+                if "<Control>" in keyname:
+                    state = state | CtrlKeyState
+                if "<Shift>" in keyname:
+                    state = state | ShiftKeyState
+                if "<Alt>" in keyname:
+                    state = state | AltKeyState
+
+                keyname = keyname.replace("<Control>", "") \
+                                 .replace("<Shift>",   "") \
+                                 .replace("<Alt>",     "")
+
+                getattr(self.states[state], press_state)[keyname] = command
+
+    def re_map(self):
+        self.states = copy.deepcopy(self._map)
+
+    def _key_press_event(self, eve):
+        keyname = Gdk.keyval_name(eve.keyval)
+        print(keyname)
+
+        self._set_key_state(eve)
+        if keyname in self.states[self.state].held:
+            return self.states[self.state].held[keyname]
+
+    def _key_release_event(self, eve):
+        keyname = Gdk.keyval_name(eve.keyval)
+
+        self._set_key_state(eve)
+        if keyname in self.states[self.state].released:
+            return self.states[self.state].released[keyname]
+
+    def _set_key_state(self, eve):
+        modifiers  = Gdk.ModifierType(eve.get_state() & ~Gdk.ModifierType.LOCK_MASK)
+        is_control = True if modifiers & Gdk.ModifierType.CONTROL_MASK else False
+        is_shift   = True if modifiers & Gdk.ModifierType.SHIFT_MASK else False
+
+        try:
+            is_alt = True if modifiers & Gdk.ModifierType.ALT_MASK else False
+        except Exception:
+            is_alt = True if modifiers & Gdk.ModifierType.MOD1_MASK else False
+
+        self.state = NoKeyState
+        if is_control:
+            self.state = self.state | CtrlKeyState
+        if is_shift:
+            self.state = self.state | ShiftKeyState
+        if is_alt:
+            self.state = self.state | AltKeyState
+

src/core/widgets/code/source_buffer.py

@@ -0,0 +1,40 @@
+# Python imports
+
+# Lib imports
+import gi
+gi.require_version('GtkSource', '4')
+from gi.repository import GtkSource
+
+# Application imports
+
+
+
+class SourceBuffer(GtkSource.Buffer):
+    def __init__(self):
+        super(SourceBuffer, self).__init__()
+
+        self._handler_ids = []
+
+
+    def set_signals(
+        self,
+        _changed,
+        _mark_set,
+        _insert_text,
+        _modified_changed,
+    ):
+
+        self._handler_ids = [
+            self.connect("changed",          _changed),
+            self.connect("mark-set",         _mark_set),
+            self.connect("insert-text",      _insert_text),
+            self.connect("modified-changed", _modified_changed)
+        ]
+
+    def clear_signals(self):
+        for handle_id in self._handler_ids:
+            self.disconnect(handle_id)
+
+    def __del__(self):
+        for handle_id in self._handler_ids:
+            self.disconnect(handle_id)

src/core/widgets/code/source_file.py

@@ -0,0 +1,77 @@
+# Python imports
+import os
+
+# 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
+from gi.repository import Gio
+
+# Application imports
+from .source_buffer import SourceBuffer
+
+
+
+class SourceFile(GtkSource.File):
+    def __init__(self):
+        super(SourceFile, self).__init__()
+
+        self.encoding: str        = "UTF-8"
+        self.fname: str           = "buffer"
+        self.fpath: str           = "buffer"
+        self.ftype: str           = "buffer"
+
+        self.buffer: SourceBuffer = SourceBuffer()
+
+        self._set_signals()
+
+
+    def set_path(self, gfile: Gio.File.new_for_path):
+        if not gfile: return
+
+        self.set_location(gfile)
+
+        self.fpath = gfile.get_parent().get_path(),
+        self.fname = gfile.get_basename()
+        data       = gfile.load_bytes()[0].get_data().decode("UTF-8")
+
+        self.buffer.insert_at_cursor(data)
+
+    def _set_signals(self):
+        self.buffer.set_signals(
+            self._changed,
+            self._mark_set,
+            self._insert_text,
+            self._modified_changed
+        )
+
+    def _insert_text(
+        self,
+        buffer: SourceBuffer,
+        location: Gtk.TextIter,
+        text: str,
+        length: int
+    ):
+        logger.info("SourceFile._insert_text")
+
+    def _changed(self, buffer: SourceBuffer):
+        logger.info("SourceFile._changed")
+
+    def _mark_set(
+        self,
+        buffer: SourceBuffer,
+        location: Gtk.TextIter,
+        mark: Gtk.TextMark
+    ):
+        # logger.info("SourceFile._mark_set")
+        ...
+
+    def _modified_changed(self,buffer: SourceBuffer):
+        logger.info("SourceFile._modified_changed")
+
+    def close(self):
+        del self.buffer

src/core/widgets/code/source_files_manager.py

@@ -0,0 +1,36 @@
+# Python imports
+
+# Lib imports
+
+# Application imports
+from .source_file import SourceFile
+from .source_buffer import SourceBuffer
+
+
+
+class SourceFilesManager(list):
+    def __init__(self):
+        super(SourceFilesManager, self).__init__()
+
+
+    def new(self):
+        file = SourceFile()
+        super().append(file)
+
+        return file
+
+    def append(self, file: SourceFile):
+        if not file: return
+
+        super().append(file)
+
+    def remove_file(self, buffer: SourceBuffer):
+        if not buffer: return
+
+        for file in self:
+            if not buffer == file.buffer: continue
+            self.remove(file)
+
+            file.close()
+            del file
+            break

src/core/widgets/code/view.py

@@ -0,0 +1,115 @@
+# 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 GLib
+from gi.repository import GtkSource
+
+# Application imports
+from .source_files_manager import SourceFilesManager
+from .completion_manager import CompletionManager
+from .command_system import CommandSystem
+from .key_mapper import KeyMapper
+
+
+class SourceView(GtkSource.View):
+    def __init__(self):
+        super(SourceView, self).__init__()
+
+        self.key_mapper = KeyMapper()
+
+        self._setup_styles()
+        self._setup_signals()
+        self._subscribe_to_events()
+        self._load_widgets()
+
+
+    def _setup_styles(self):
+        ctx = self.get_style_context()
+        ctx.add_class("source-view")
+
+        self.set_vexpand(True)
+
+        self.set_show_line_marks(True)
+        self.set_show_line_numbers(True)
+        self.set_smart_backspace(True)
+        self.set_indent_on_tab(True)
+        self.set_insert_spaces_instead_of_tabs(True)
+        self.set_auto_indent(True)
+        self.set_monospace(True)
+        self.set_tab_width(4)
+        self.set_show_right_margin(True)
+        self.set_right_margin_position(80)
+        self.set_background_pattern(0) # 0 = None, 1 = Grid
+        self.set_highlight_current_line(True)
+
+    def _setup_signals(self):
+        # self.connect("show-completion", self._show_completion)
+        self.map_id =  self.connect("map", self._init_map)
+
+        # self.connect("focus", self._on_widget_focus)
+        # self.connect("focus-in-event", self._focus_in_event)
+
+        # self.connect("drag-data-received", self._on_drag_data_received)
+        self.connect("key-press-event", self._key_press_event)
+        self.connect("key-release-event", self._key_release_event)
+        # self.connect("button-press-event", self._button_press_event)
+        # self.connect("button-release-event", self._button_release_event)
+        # self.connect("scroll-event", self._scroll_event)
+
+    def _subscribe_to_events(self):
+        ...
+
+    def _load_widgets(self):
+        ...
+
+    def _init_map(self, view):
+        def _first_show_init():
+            self.disconnect(self.map_id)
+            del self.map_id
+
+            self._handle_first_show()
+
+            return False
+
+        # GLib.timeout_add(1000, _first_show_init)
+        GLib.idle_add(_first_show_init)
+
+    def _handle_first_show(self):
+        self.language_manager     = GtkSource.LanguageManager()
+        self.style_scheme_manager = GtkSource.StyleSchemeManager()
+        self.command              = CommandSystem()
+        self.files                = SourceFilesManager()
+        self.completion           = CompletionManager(
+            self.get_completion()
+        )
+
+        self.style_scheme_manager.append_search_path(f"{settings_manager.get_home_config_path()}/code_styles")
+        self.syntax_theme = self.style_scheme_manager.get_scheme("penguins-in-space")
+
+        self.command.set_data(self, self.get_buffer())
+        self.exec_command("new_file")
+
+    def _key_press_event(self, view, eve):
+        command = self.key_mapper._key_press_event(eve)
+        if not command: return False
+
+        self.exec_command(command)
+        return True
+
+    def _key_release_event(self, view, eve):
+        command = self.key_mapper._key_release_event(eve)
+        if not command: return False
+
+        self.exec_command(command)
+        return True
+
+    def _show_completion(self, view):
+        self.completion.request_completion()
+
+    def exec_command(self, command: str):
+        self.command.exec(command)

src/core/window.py

@@ -118,9 +118,8 @@ class Window(Gtk.ApplicationWindow):
 
         # bind css file
         cssProvider  = Gtk.CssProvider()
-        cssProvider.load_from_path( settings_manager.get_css_file() )
-        screen       = Gdk.Screen.get_default()
         styleContext = Gtk.StyleContext()
+        cssProvider.load_from_path( settings_manager.get_css_file() )
         styleContext.add_provider_for_screen(screen, cssProvider, Gtk.STYLE_PROVIDER_PRIORITY_USER)
 
     def _area_draw(self, widget: Gtk.ApplicationWindow, cr: cairo.Context) -> None: