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/// A parser for terminal output which produces an in-memory representation of
/// the terminal contents.
pub struct Parser {
parser: vte::Parser,
screen: crate::screen::Screen,
}
impl Parser {
/// Creates a new terminal parser of the given size and with the given
/// amount of scrollback.
pub fn new(rows: u16, cols: u16, scrollback_len: usize) -> Self {
Self {
parser: vte::Parser::new(),
screen: crate::screen::Screen::new(
crate::grid::Size { rows, cols },
scrollback_len,
),
}
}
/// Processes the contents of the given byte string, and updates the
/// in-memory terminal state.
pub fn process(&mut self, bytes: &[u8]) {
for byte in bytes {
self.parser.advance(&mut self.screen, *byte);
}
}
/// Resizes the terminal.
pub fn set_size(&mut self, rows: u16, cols: u16) {
self.screen.set_size(rows, cols);
}
/// Scrolls to the given position in the scrollback.
///
/// This position indicates the offset from the top of the screen, and
/// should be `0` to put the normal screen in view.
///
/// This affects the return values of methods called on `parser.screen()`:
/// for instance, `parser.screen().cell(0, 0)` will return the top left
/// corner of the screen after taking the scrollback offset into account.
/// It does not affect `parser.process()` at all.
///
/// The value given will be clamped to the actual size of the scrollback.
pub fn set_scrollback(&mut self, rows: usize) {
self.screen.set_scrollback(rows);
}
/// Returns a reference to a `Screen` object containing the terminal
/// state.
pub fn screen(&self) -> &crate::screen::Screen {
&self.screen
}
}
impl Default for Parser {
/// Returns a parser with dimensions 80x24 and no scrollback.
fn default() -> Self {
Self::new(24, 80, 0)
}
}
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