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|
use nu_engine::eval_block;
use nu_protocol::{
debugger::WithoutDebug,
engine::{EngineState, Stack},
IntoPipelineData, Span, Value,
};
use reedline::{menu_functions::parse_selection_char, Completer, Suggestion};
use std::sync::Arc;
const SELECTION_CHAR: char = '!';
pub struct NuMenuCompleter {
block_id: usize,
span: Span,
stack: Stack,
engine_state: Arc<EngineState>,
only_buffer_difference: bool,
}
impl NuMenuCompleter {
pub fn new(
block_id: usize,
span: Span,
stack: Stack,
engine_state: Arc<EngineState>,
only_buffer_difference: bool,
) -> Self {
Self {
block_id,
span,
stack: stack.reset_out_dest().collect_value(),
engine_state,
only_buffer_difference,
}
}
}
impl Completer for NuMenuCompleter {
fn complete(&mut self, line: &str, pos: usize) -> Vec<Suggestion> {
let parsed = parse_selection_char(line, SELECTION_CHAR);
let block = self.engine_state.get_block(self.block_id);
if let Some(buffer) = block.signature.get_positional(0) {
if let Some(buffer_id) = &buffer.var_id {
let line_buffer = Value::string(parsed.remainder, self.span);
self.stack.add_var(*buffer_id, line_buffer);
}
}
if let Some(position) = block.signature.get_positional(1) {
if let Some(position_id) = &position.var_id {
let line_buffer = Value::int(pos as i64, self.span);
self.stack.add_var(*position_id, line_buffer);
}
}
let input = Value::nothing(self.span).into_pipeline_data();
let res = eval_block::<WithoutDebug>(&self.engine_state, &mut self.stack, block, input);
if let Ok(values) = res.and_then(|data| data.into_value(self.span)) {
convert_to_suggestions(values, line, pos, self.only_buffer_difference)
} else {
Vec::new()
}
}
}
fn convert_to_suggestions(
value: Value,
line: &str,
pos: usize,
only_buffer_difference: bool,
) -> Vec<Suggestion> {
match value {
Value::Record { val, .. } => {
let text = val
.get("value")
.and_then(|val| val.coerce_string().ok())
.unwrap_or_else(|| "No value key".to_string());
let description = val
.get("description")
.and_then(|val| val.coerce_string().ok());
let span = match val.get("span") {
Some(Value::Record { val: span, .. }) => {
let start = span.get("start").and_then(|val| val.as_int().ok());
let end = span.get("end").and_then(|val| val.as_int().ok());
match (start, end) {
(Some(start), Some(end)) => {
let start = start.min(end);
reedline::Span {
start: start as usize,
end: end as usize,
}
}
_ => reedline::Span {
start: if only_buffer_difference {
pos - line.len()
} else {
0
},
end: if only_buffer_difference {
pos
} else {
line.len()
},
},
}
}
_ => reedline::Span {
start: if only_buffer_difference {
pos - line.len()
} else {
0
},
end: if only_buffer_difference {
pos
} else {
line.len()
},
},
};
let extra = match val.get("extra") {
Some(Value::List { vals, .. }) => {
let extra: Vec<String> = vals
.iter()
.filter_map(|extra| match extra {
Value::String { val, .. } => Some(val.clone()),
_ => None,
})
.collect();
Some(extra)
}
_ => None,
};
vec![Suggestion {
value: text,
description,
extra,
span,
..Suggestion::default()
}]
}
Value::List { vals, .. } => vals
.into_iter()
.flat_map(|val| convert_to_suggestions(val, line, pos, only_buffer_difference))
.collect(),
_ => vec![Suggestion {
value: format!("Not a record: {value:?}"),
span: reedline::Span {
start: if only_buffer_difference {
pos - line.len()
} else {
0
},
end: if only_buffer_difference {
pos
} else {
line.len()
},
},
..Suggestion::default()
}],
}
}
|
