Module screen_buffer 

This module contains the code needed for the implementation of a stateful buffer that holds a history of the lines/data received from the serial connection and the rendering/updating of the buffer to the terminal screen (stdout).

Simply writing the data received from the serial connection directly to stdout creates one main issue: there is no history of previous lines that were received from the serial connection. Without a screen buffer, lines would simply be wiped from existence as they exit the terminal’s screen.

As a result, there would be no way to implement features like scrolling, highlighting text (for UI purposes), and getting characters at specific locations within the screen for things like copying to a clipboard.

The screen buffer solves these issues by storing each line received from the connection in a VecDeque. It is important to note that currently, the capacity of the VecDeque is not hardcoded and is theoretically allowed to grow forever, limited by memory.

Structs

ScreenBuffer

The ScreenBuffer holds rendering state for the entire terminal’s window/frame. It mainly serves to allow for user-interactions that require a history and location of the data displayed within the terminal i.e. copy/paste, scrolling, & highlighting.

Enums

UICommand

UICommand is used for communication between stdin and the ScreenBuffer.