Struct Screen 

pub struct Screen {
    pub rows: usize,
    pub columns: usize,
    pub cursor: usize,
    pub alarm: bool,
    pub keyboard_locked: bool,
    /* private fields */
}

Fields

rows: usize

columns: usize

cursor: usize

alarm: bool

keyboard_locked: bool

Implementations

impl Screen

pub fn new(rows: usize, columns: usize) -> Self

pub fn size(&self) -> usize

pub fn position(&self, address: usize) -> (usize, usize)

Row and column (both from 1) of a buffer address.

pub fn address(&self, row: usize, column: usize) -> usize

pub fn fields(&self) -> Vec<FieldView>

Every field, in buffer order; empty when the screen is unformatted.

pub fn field_at(&self, address: usize) -> Option<FieldView>

The field a buffer address falls in.

pub fn field_data(&self, field: &FieldView) -> Vec<u8>

pub fn home(&mut self)

The Home key: the cursor to the first position of the first unprotected field, or to address 0 when the screen has none.

pub fn tab(&mut self)

The Tab key: the cursor to the first position of the next unprotected field after it, wrapping, or to address 0 when the screen has none.

pub fn apply(&mut self, stream: &[u8]) -> Result<(), String>

Applies an outbound data stream: a command, its WCC, then orders and data.

pub fn type_at(&mut self, address: usize, text: &[u8]) -> Result<(), String>

The operator typing text (EBCDIC) at an address: it must be in an unprotected field, and it sets the field’s modified bit. Typing stops at the end of the field. An unformatted screen takes typing anywhere, wrapping at its end.

pub fn erase_eof(&mut self, address: usize) -> Result<(), String>

ERASE EOF: clears the rest of the field at an address and sets its modified bit.

pub fn read_modified(&self, aid: u8) -> Vec<u8>

The inbound stream an AID key sends: Read Modified, or the short read of CLEAR and the PA keys (the AID alone). Nulls in a field’s data are not sent.

pub fn render(&self, page: &CodePage) -> String

The screen as text: attribute positions and nulls as spaces, non-display fields blank.

Trait Implementations

impl Clone for Screen

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Screen

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Screen

impl PartialEq for Screen

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Screen