Editor: Simplify `_parse_message`; separate into handler functions

Move the individual message handlers to separate functions, to make it
easier to follow and add additional message handlers. The function
is also more efficient as it only performs a single hash lookup for
the handler and then dispatches to the member function.

editor/debugger/script_editor_debugger.h

@@ -190,6 +190,42 @@ private:
 	void _stack_dump_frame_selected();
 
 	void _file_selected(const String &p_file);
+
+	/// Message handler function for _parse_message.
+	typedef void (ScriptEditorDebugger::*ParseMessageFunc)(uint64_t p_thread_id, const Array &p_data);
+	static HashMap<String, ParseMessageFunc> parse_message_handlers;
+	static void _init_parse_message_handlers();
+
+	void _msg_debug_enter(uint64_t p_thread_id, const Array &p_data);
+	void _msg_debug_exit(uint64_t p_thread_id, const Array &p_data);
+	void _msg_set_pid(uint64_t p_thread_id, const Array &p_data);
+	void _msg_scene_click_ctrl(uint64_t p_thread_id, const Array &p_data);
+	void _msg_scene_scene_tree(uint64_t p_thread_id, const Array &p_data);
+	void _msg_scene_inspect_objects(uint64_t p_thread_id, const Array &p_data);
+	void _msg_servers_memory_usage(uint64_t p_thread_id, const Array &p_data);
+	void _msg_servers_drawn(uint64_t p_thread_id, const Array &p_data);
+	void _msg_stack_dump(uint64_t p_thread_id, const Array &p_data);
+	void _msg_stack_frame_vars(uint64_t p_thread_id, const Array &p_data);
+	void _msg_stack_frame_var(uint64_t p_thread_id, const Array &p_data);
+	void _msg_output(uint64_t p_thread_id, const Array &p_data);
+	void _msg_performance_profile_frame(uint64_t p_thread_id, const Array &p_data);
+	void _msg_visual_hardware_info(uint64_t p_thread_id, const Array &p_data);
+	void _msg_visual_profile_frame(uint64_t p_thread_id, const Array &p_data);
+	void _msg_error(uint64_t p_thread_id, const Array &p_data);
+	void _msg_servers_function_signature(uint64_t p_thread_id, const Array &p_data);
+	void _msg_servers_profile_common(const Array &p_data, const bool p_final);
+	void _msg_servers_profile_frame(uint64_t p_thread_id, const Array &p_data);
+	void _msg_servers_profile_total(uint64_t p_thread_id, const Array &p_data);
+	void _msg_request_quit(uint64_t p_thread_id, const Array &p_data);
+	void _msg_remote_nodes_clicked(uint64_t p_thread_id, const Array &p_data);
+	void _msg_remote_nothing_clicked(uint64_t p_thread_id, const Array &p_data);
+	void _msg_remote_selection_invalidated(uint64_t p_thread_id, const Array &p_data);
+	void _msg_show_selection_limit_warning(uint64_t p_thread_id, const Array &p_data);
+	void _msg_performance_profile_names(uint64_t p_thread_id, const Array &p_data);
+	void _msg_filesystem_update_file(uint64_t p_thread_id, const Array &p_data);
+	void _msg_evaluation_return(uint64_t p_thread_id, const Array &p_data);
+	void _msg_window_title(uint64_t p_thread_id, const Array &p_data);
+
 	void _parse_message(const String &p_msg, uint64_t p_thread_id, const Array &p_data);
 	void _set_reason_text(const String &p_reason, MessageType p_type);
 	void _update_buttons_state();