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use cancellation::CancellationToken;
use cstree::TextRange;
use lsp_types::CompletionParams;
use crate::{
features::{cursor::CursorContext, lsp_kinds::Structure},
render_label,
syntax::{latex, CstNode},
LabelledObject,
};
use super::types::{InternalCompletionItem, InternalCompletionItemData};
pub fn complete_labels<'a>(
context: &'a CursorContext<CompletionParams>,
items: &mut Vec<InternalCompletionItem<'a>>,
cancellation_token: &CancellationToken,
) -> Option<()> {
cancellation_token.result().ok()?;
let (range, is_math) = find_reference(context).or_else(|| find_reference_range(context))?;
for document in &context.request.subset.documents {
if let Some(data) = document.data.as_latex() {
for label in data
.root
.descendants()
.filter(|_| !cancellation_token.is_canceled())
.filter_map(latex::LabelDefinition::cast)
{
if let Some(name) = label
.name()
.and_then(|name| name.key())
.map(|name| name.to_string())
{
match render_label(&context.request.subset, &name, Some(label)) {
Some(rendered_label) => {
let kind = match &rendered_label.object {
LabelledObject::Section { .. } => Structure::Section,
LabelledObject::Float { .. } => Structure::Float,
LabelledObject::Theorem { .. } => Structure::Theorem,
LabelledObject::Equation => Structure::Equation,
LabelledObject::EnumItem => Structure::Item,
};
if is_math && kind != Structure::Equation {
continue;
}
let header = rendered_label.detail();
let footer = match &rendered_label.object {
LabelledObject::Float { caption, .. } => Some(caption.clone()),
_ => None,
};
let text = format!("{} {}", name, rendered_label.reference());
let item = InternalCompletionItem::new(
range,
InternalCompletionItemData::Label {
name,
kind,
header,
footer,
text,
},
);
items.push(item);
}
None => {
let kind = Structure::Label;
let header = None;
let footer = None;
let text = name.to_string();
let item = InternalCompletionItem::new(
range,
InternalCompletionItemData::Label {
name,
kind,
header,
footer,
text,
},
);
items.push(item);
}
}
}
}
}
}
Some(())
}
fn find_reference(context: &CursorContext<CompletionParams>) -> Option<(TextRange, bool)> {
let (_, range, group) = context.find_curly_group_word_list()?;
let reference = latex::LabelReference::cast(group.syntax().parent()?)?;
let is_math = reference.command()?.text() == "\\eqref";
Some((range, is_math))
}
fn find_reference_range(context: &CursorContext<CompletionParams>) -> Option<(TextRange, bool)> {
let (_, range, group) = context.find_curly_group_word()?;
latex::LabelReferenceRange::cast(group.syntax().parent()?)?;
Some((range, false))
}
#[cfg(test)]
mod tests {
use cstree::TextRange;
use crate::features::testing::FeatureTester;
use super::*;
#[test]
fn test_empty_latex_document() {
let request = FeatureTester::builder()
.files(vec![("main.tex", "")])
.main("main.tex")
.line(0)
.character(0)
.build()
.completion();
let context = CursorContext::new(request);
let mut actual_items = Vec::new();
complete_labels(&context, &mut actual_items, CancellationToken::none());
assert!(actual_items.is_empty());
}
#[test]
fn test_empty_bibtex_document() {
let request = FeatureTester::builder()
.files(vec![("main.bib", "")])
.main("main.bib")
.line(0)
.character(0)
.build()
.completion();
let context = CursorContext::new(request);
let mut actual_items = Vec::new();
complete_labels(&context, &mut actual_items, CancellationToken::none());
assert!(actual_items.is_empty());
}
#[test]
fn test_simple() {
let request = FeatureTester::builder()
.files(vec![("main.tex", "\\ref{}\\label{foo}")])
.main("main.tex")
.line(0)
.character(5)
.build()
.completion();
let context = CursorContext::new(request);
let mut actual_items = Vec::new();
complete_labels(&context, &mut actual_items, CancellationToken::none());
assert!(!actual_items.is_empty());
for item in actual_items {
assert_eq!(item.range, TextRange::new(5.into(), 5.into()));
}
}
#[test]
fn test_simple_range() {
let request = FeatureTester::builder()
.files(vec![("main.tex", "\\crefrange{\n\\label{foo}")])
.main("main.tex")
.line(0)
.character(11)
.build()
.completion();
let context = CursorContext::new(request);
let mut actual_items = Vec::new();
complete_labels(&context, &mut actual_items, CancellationToken::none());
assert!(!actual_items.is_empty());
for item in actual_items {
assert_eq!(item.range, TextRange::new(11.into(), 11.into()));
}
}
#[test]
fn test_multi_word() {
let request = FeatureTester::builder()
.files(vec![("main.tex", "\\ref{foo}\\label{foo bar}")])
.main("main.tex")
.line(0)
.character(8)
.build()
.completion();
let context = CursorContext::new(request);
let mut actual_items = Vec::new();
complete_labels(&context, &mut actual_items, CancellationToken::none());
assert!(!actual_items.is_empty());
for item in actual_items {
assert_eq!(item.range, TextRange::new(5.into(), 8.into()));
}
}
}
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