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|
use crate::completions::{
completer::map_value_completions, Completer, CompletionOptions, MatchAlgorithm,
SemanticSuggestion,
};
use nu_engine::eval_call;
use nu_protocol::{
ast::{Argument, Call, Expr, Expression},
debugger::WithoutDebug,
engine::{Stack, StateWorkingSet},
CompletionSort, PipelineData, Span, Type, Value,
};
use nu_utils::IgnoreCaseExt;
use std::collections::HashMap;
use super::completion_common::sort_suggestions;
pub struct CustomCompletion {
stack: Stack,
decl_id: usize,
line: String,
}
impl CustomCompletion {
pub fn new(stack: Stack, decl_id: usize, line: String) -> Self {
Self {
stack,
decl_id,
line,
}
}
}
impl Completer for CustomCompletion {
fn fetch(
&mut self,
working_set: &StateWorkingSet,
_stack: &Stack,
prefix: Vec<u8>,
span: Span,
offset: usize,
pos: usize,
completion_options: &CompletionOptions,
) -> Vec<SemanticSuggestion> {
// Line position
let line_pos = pos - offset;
// Call custom declaration
let result = eval_call::<WithoutDebug>(
working_set.permanent_state,
&mut self.stack,
&Call {
decl_id: self.decl_id,
head: span,
arguments: vec![
Argument::Positional(Expression::new_unknown(
Expr::String(self.line.clone()),
Span::unknown(),
Type::String,
)),
Argument::Positional(Expression::new_unknown(
Expr::Int(line_pos as i64),
Span::unknown(),
Type::Int,
)),
],
parser_info: HashMap::new(),
},
PipelineData::empty(),
);
let mut custom_completion_options = None;
// Parse result
let suggestions = result
.and_then(|data| data.into_value(span))
.map(|value| match &value {
Value::Record { val, .. } => {
let completions = val
.get("completions")
.and_then(|val| {
val.as_list()
.ok()
.map(|it| map_value_completions(it.iter(), span, offset))
})
.unwrap_or_default();
let options = val.get("options");
if let Some(Value::Record { val: options, .. }) = &options {
let should_sort = options
.get("sort")
.and_then(|val| val.as_bool().ok())
.unwrap_or(false);
custom_completion_options = Some(CompletionOptions {
case_sensitive: options
.get("case_sensitive")
.and_then(|val| val.as_bool().ok())
.unwrap_or(true),
positional: options
.get("positional")
.and_then(|val| val.as_bool().ok())
.unwrap_or(true),
match_algorithm: match options.get("completion_algorithm") {
Some(option) => option
.coerce_string()
.ok()
.and_then(|option| option.try_into().ok())
.unwrap_or(MatchAlgorithm::Prefix),
None => completion_options.match_algorithm,
},
sort: if should_sort {
CompletionSort::Alphabetical
} else {
CompletionSort::Smart
},
});
}
completions
}
Value::List { vals, .. } => map_value_completions(vals.iter(), span, offset),
_ => vec![],
})
.unwrap_or_default();
let options = custom_completion_options
.as_ref()
.unwrap_or(completion_options);
let suggestions = filter(&prefix, suggestions, options);
sort_suggestions(&String::from_utf8_lossy(&prefix), suggestions, options)
}
}
fn filter(
prefix: &[u8],
items: Vec<SemanticSuggestion>,
options: &CompletionOptions,
) -> Vec<SemanticSuggestion> {
items
.into_iter()
.filter(|it| match options.match_algorithm {
MatchAlgorithm::Prefix => match (options.case_sensitive, options.positional) {
(true, true) => it.suggestion.value.as_bytes().starts_with(prefix),
(true, false) => it
.suggestion
.value
.contains(std::str::from_utf8(prefix).unwrap_or("")),
(false, positional) => {
let value = it.suggestion.value.to_folded_case();
let prefix = std::str::from_utf8(prefix).unwrap_or("").to_folded_case();
if positional {
value.starts_with(&prefix)
} else {
value.contains(&prefix)
}
}
},
MatchAlgorithm::Fuzzy => options
.match_algorithm
.matches_u8(it.suggestion.value.as_bytes(), prefix),
})
.collect()
}
|
