50 lines
1.5 KiB
Rust
50 lines
1.5 KiB
Rust
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use rustyline::error::ReadlineError;
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use rustyline::{Cmd, ConditionalEventHandler, DefaultEditor, Event, EventContext, EventHandler, KeyEvent, Movement, RepeatCount, Result};
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struct CtrlCHandler;
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impl ConditionalEventHandler for CtrlCHandler {
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fn handle(&self, evt: &Event, n: RepeatCount, positive: bool, ctx: &EventContext) -> Option<Cmd> {
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Some(if !ctx.line().is_empty() {
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Cmd::Kill(Movement::WholeLine)
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} else {
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Cmd::Interrupt
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})
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}
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}
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fn main() -> Result<()> {
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// `()` can be used when no completer is required
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let mut rl = DefaultEditor::new()?;
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rl.bind_sequence(
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KeyEvent::ctrl('c'),
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EventHandler::Conditional(Box::from(CtrlCHandler)));
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#[cfg(feature = "with-file-history")]
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if rl.load_history("history.txt").is_err() {
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println!("No previous history.");
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}
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loop {
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let readline = rl.readline(">> ");
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match readline {
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Ok(line) => {
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rl.add_history_entry(line.as_str());
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println!("Line: {}", line);
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},
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Err(ReadlineError::Interrupted) => {
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println!("CTRL-C");
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break
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},
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Err(ReadlineError::Eof) => {
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println!("CTRL-D");
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break
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},
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Err(err) => {
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println!("Error: {:?}", err);
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break
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}
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}
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}
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#[cfg(feature = "with-file-history")]
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rl.save_history("history.txt");
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Ok(())
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}
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