refactor: remove LSPServerEventsMixin and clean up websocket tests

- Delete unused websocket library test files
- Remove LSPServerEventsMixin and inline its methods into response handlers
- Clean up unused imports (ThreadPoolExecutor, ABC, LSP message structs)

plugins/code/ui/lsp_manager/mixins/lsp_server_events_mixin.py

@@ -1,106 +0,0 @@
-# Python imports
-
-# Lib imports
-import gi
-
-gi.require_version('GtkSource', '4')
-
-from gi.repository import GLib
-from gi.repository import GtkSource
-
-# Application imports
-from libs.event_factory import Event_Factory, Code_Event_Types
-
-
-
-class LSPServerEventsMixin:
-
-    def _handle_definition_response(self, uri: str, pointer_pos: dict):
-        self._prompt_goto_request(uri, pointer_pos)
-
-    def _handle_completion_response(self, result: dict or list):
-        if not result: return
-
-        items = []
-        if isinstance(result, dict):
-            items = result.get("items", [])
-        elif isinstance(result, list):
-            items = result
-
-        self.matchers.clear()
-        for item in items:
-            label = item.get("label")
-            if not label: return None
-
-            text = (
-                item.get("insertText")
-                or item.get("textEdit", {}).get("newText")
-                or item.get("textEditText", "")
-                or label
-            )
-
-            detail = item.get("detail")
-            doc    = item.get("documentation")
-
-            if detail:
-                info = detail
-            elif isinstance(doc, dict):
-                info = doc.get("value", "")
-            else:
-                info = str(doc) if doc else ""
-
-            self.matchers[label] = {
-                "label": label,
-                "text": text,
-                "info": info
-            }
-
-        self._prompt_completion_request()
-
-
-    def _prompt_goto_request(self, uri: str, pointer_pos: dict):
-        event  = Event_Factory.create_event(
-            "get_active_view",
-        )
-        self.emit_to("source_views", event)
-        view = event.response
-        view._on_uri_data_received( [uri] )
-
-        buffer = view.get_buffer()
-
-        def move_cursor(buffer, pointer_pos):
-            itr = buffer.get_iter_at_line( pointer_pos["end"]["line"] )
-            itr.forward_chars( pointer_pos["end"]["character"] )
-            buffer.place_cursor(itr)
-            view.scroll_to_iter(itr, 0.2, False, 0, 0)
-
-        GLib.idle_add( move_cursor, buffer, pointer_pos )
-
-    def _prompt_completion_request(self):
-        event = Event_Factory.create_event("get_active_view")
-        self.emit_to("source_views", event)
-        view  = event.response
-
-        event = Event_Factory.create_event(
-            "request_completion",
-            view     = view,
-            provider = self._provider
-        )
-        self.emit_to("completion", event)
-
-    def _handle_java_class_file_contents(self, text: str):
-        event  = Event_Factory.create_event(
-            "get_active_view",
-        )
-        self.emit_to("source_views", event)
-
-        view       = event.response
-        file       = view.command.exec("new_file")
-        buffer     = view.get_buffer()
-        itr        = buffer.get_iter_at_mark( buffer.get_insert() )
-        lm         = GtkSource.LanguageManager.get_default()
-        language   = lm.get_language("java")
-        file.ftype = "java"
-
-        buffer.set_language(language)
-        buffer.insert(itr, text, -1)