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Update custom key bindings example #638

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Update custom key bindings example #638

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f4975f3
Update custom key bindings example
sigmaSd Jun 17, 2022
ac1c444
fix tab handler on windows
sigmaSd Jun 21, 2022
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16 changes: 11 additions & 5 deletions examples/custom_key_bindings.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -3,8 +3,8 @@ use std::borrow::Cow::{self, Borrowed, Owned};
use rustyline::highlight::Highlighter;
use rustyline::hint::HistoryHinter;
use rustyline::{
Cmd, ConditionalEventHandler, Editor, Event, EventContext, EventHandler, KeyEvent, RepeatCount,
Result,
Cmd, ConditionalEventHandler, Editor, Event, EventContext, EventHandler, KeyCode, KeyEvent,
Modifiers, RepeatCount, Result,
};
use rustyline_derive::{Completer, Helper, Hinter, Validator};

Expand Down Expand Up @@ -69,15 +69,21 @@ impl ConditionalEventHandler for CompleteHintHandler {
struct TabEventHandler;
impl ConditionalEventHandler for TabEventHandler {
fn handle(&self, evt: &Event, n: RepeatCount, _: bool, ctx: &EventContext) -> Option<Cmd> {
debug_assert_eq!(*evt, Event::from(KeyEvent::from('\t')));
debug_assert_eq!(*evt, Event::from(KeyEvent(KeyCode::Tab, Modifiers::NONE)));
if ctx.line()[..ctx.pos()]
.chars()
.rev()
.next()
.filter(|c| c.is_whitespace())
.is_some()
{
Some(Cmd::SelfInsert(n, '\t'))
if cfg!(target_os = "windows") {
// Inserting a tab is broken in windows with rustyline
// use 4 spaces as a workaround for now
Some(Cmd::Insert(n, " ".into()))
} else {
Some(Cmd::Insert(n, "\t".into()))
}
} else {
None // default complete
}
Expand All @@ -92,7 +98,7 @@ fn main() -> Result<()> {
rl.bind_sequence(KeyEvent::ctrl('E'), EventHandler::Conditional(ceh.clone()));
rl.bind_sequence(KeyEvent::alt('f'), EventHandler::Conditional(ceh));
rl.bind_sequence(
KeyEvent::from('\t'),
KeyEvent(KeyCode::Tab, Modifiers::NONE),
EventHandler::Conditional(Box::new(TabEventHandler)),
);
rl.bind_sequence(
Expand Down