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/// A parser for terminal output which produces an in-memory representation of
/// the terminal contents.
pub struct Parser<CB: crate::callbacks::Callbacks = ()> {
parser: vte::Parser,
screen: crate::perform::WrappedScreen<CB>,
}
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::new(
rows,
cols,
scrollback_len,
),
}
}
}
impl<CB: crate::callbacks::Callbacks> Parser<CB> {
/// Creates a new terminal parser of the given size and with the given
/// amount of scrollback. Terminal events will be reported via method
/// calls on the provided [`Callbacks`](crate::callbacks::Callbacks)
/// implementation.
pub fn new_with_callbacks(
rows: u16,
cols: u16,
scrollback_len: usize,
callbacks: CB,
) -> Self {
Self {
parser: vte::Parser::new(),
screen: crate::perform::WrappedScreen::new_with_callbacks(
rows,
cols,
scrollback_len,
callbacks,
),
}
}
/// Processes the contents of the given byte string, and updates the
/// in-memory terminal state.
pub fn process(&mut self, bytes: &[u8]) {
self.parser.advance(&mut self.screen, bytes);
}
/// Returns a reference to a [`Screen`](crate::Screen) object containing
/// the terminal state.
#[must_use]
pub fn screen(&self) -> &crate::Screen {
&self.screen.screen
}
/// Returns a mutable reference to a [`Screen`](crate::Screen) object
/// containing the terminal state.
#[must_use]
pub fn screen_mut(&mut self) -> &mut crate::Screen {
&mut self.screen.screen
}
/// Returns a reference to the [`Callbacks`](crate::callbacks::Callbacks)
/// state object passed into the constructor.
pub fn callbacks(&self) -> &CB {
&self.screen.callbacks
}
/// Returns a mutable reference to the
/// [`Callbacks`](crate::callbacks::Callbacks) state object passed into
/// the constructor.
pub fn callbacks_mut(&mut self) -> &mut CB {
&mut self.screen.callbacks
}
}
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(())
}
}