continued to work on new UI library

- implemented CgStatusBar widget which is a specific version of the CgIndicatorBar widget with predefined fields

- std::io::Screen is now an enum that makes switching between display modes more intuitive

- created a basic CgLineEdit implementation that allows for a user to type in a character and have it re-render that widget

- other more minor changes like fixes for existing apps to work with new features

src/user/lib/libgui/cg_core.rs

@@ -7,17 +7,24 @@ use crate::kernel::render::{ColorCode, RenderError, ScreenChar};
 use crate::{printerr, serial_println};
 use crate::std::frame::{ColouredChar, Dimensions, Position, special_char, Frame};
 
-
-
-pub trait CgOutline {
+/// implement this trait if you require the widget to be able to have an outline
+pub trait CgOutline: CgComponent {
 	fn render_outline(&self, frame: &mut Frame);
 }
 
+/// generic components for the user interface that defined a render method. this should be implemented for all types
+/// that can be rendered to the screen.
 pub trait CgComponent {
 	fn render(&self) -> Result<Frame, RenderError>;
 }
 
-
+/// trait for components that can have editable text, such as search boxes, command palletes, terminals, text inputs etc.
+pub trait CgTextEdit: CgComponent {
+	fn write_char(&self) -> Result<Frame, RenderError>; // this can also be implemented in a way that inserts characters
+	fn delete_char(&self) -> Result<Frame, RenderError>;
+	fn move_cursor(&self, direction: bool) -> Result<(), RenderError>; // true = right, false = left
+	fn clear(&self) -> Result<Frame, RenderError>;
+}