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use crate::range::RangeExt;
use crate::syntax::*;
use crate::workspace::*;
use futures_boxed::boxed;
use lsp_types::{CompletionItem, CompletionParams};
#[derive(Debug)]
pub struct PreselectCompletionProvider<F> {
provider: F,
}
impl<F> PreselectCompletionProvider<F> {
pub fn new(provider: F) -> Self {
Self { provider }
}
}
impl<F> FeatureProvider for PreselectCompletionProvider<F>
where
F: FeatureProvider<Params = CompletionParams, Output = Vec<CompletionItem>> + Send + Sync,
{
type Params = CompletionParams;
type Output = Vec<CompletionItem>;
#[boxed]
async fn execute<'a>(&'a self, request: &'a FeatureRequest<Self::Params>) -> Self::Output {
let mut items = self.provider.execute(request).await;
if let SyntaxTree::Latex(tree) = &request.document().tree {
for environment in &tree.env.environments {
if let Some(name) = environment.left.name() {
let right_args = &environment.right.command.args[0];
let cond1 = right_args
.range()
.contains_exclusive(request.params.text_document_position.position);
let cond2 = right_args.right.is_none()
&& right_args
.range()
.contains(request.params.text_document_position.position);
if cond1 || cond2 {
for item in &mut items {
item.preselect = Some(false);
if item.label == name.text() {
item.preselect = Some(true);
break;
}
}
}
}
}
}
items
}
}
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