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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::perform::WrappedScreen,
}
impl Parser {
/// Creates a new terminal parser of the given size and with the given
/// amount of scrollback.
#[must_use]
pub fn new(rows: u16, cols: u16, scrollback_len: usize) -> Self {
Self {
parser: vte::Parser::new(),
screen: crate::perform::WrappedScreen(crate::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);
}
}
/// Processes the contents of the given byte string, and updates the
/// in-memory terminal state. Calls methods on the given `Callbacks`
/// object when relevant escape sequences are seen.
pub fn process_cb(
&mut self,
bytes: &[u8],
callbacks: &mut impl crate::callbacks::Callbacks,
) {
let mut state = crate::state::State::new(&mut self.screen, callbacks);
for byte in bytes {
self.parser.advance(&mut state, *byte);
}
}
/// Returns a reference to a `Screen` object containing the terminal
/// state.
#[must_use]
pub fn screen(&self) -> &crate::Screen {
&self.screen.0
}
/// Returns a mutable reference to a `Screen` object containing the
/// terminal state.
#[must_use]
pub fn screen_mut(&mut self) -> &mut crate::Screen {
&mut self.screen.0
}
}
impl Default for Parser {
/// Returns a parser with dimensions 80x24 and no scrollback.
fn default() -> Self {
Self::new(24, 80, 0)
}
}
impl std::io::Write for Parser {
fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
self.process(buf);
Ok(buf.len())
}
fn flush(&mut self) -> std::io::Result<()> {
Ok(())
}
}
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