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path: root/support/texlab/src/features/completion/user_environment.rs
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-rw-r--r--support/texlab/src/features/completion/user_environment.rs116
1 files changed, 116 insertions, 0 deletions
diff --git a/support/texlab/src/features/completion/user_environment.rs b/support/texlab/src/features/completion/user_environment.rs
new file mode 100644
index 0000000000..a1a5701fac
--- /dev/null
+++ b/support/texlab/src/features/completion/user_environment.rs
@@ -0,0 +1,116 @@
+use cancellation::CancellationToken;
+use cstree::TextRange;
+use lsp_types::CompletionParams;
+
+use crate::{
+ features::cursor::CursorContext,
+ syntax::{latex, CstNode},
+};
+
+use super::types::{InternalCompletionItem, InternalCompletionItemData};
+
+pub fn complete_user_environments<'a>(
+ context: &'a CursorContext<CompletionParams>,
+ items: &mut Vec<InternalCompletionItem<'a>>,
+ cancellation_token: &CancellationToken,
+) -> Option<()> {
+ cancellation_token.result().ok()?;
+
+ let token = context.cursor.as_latex()?;
+ let group = latex::CurlyGroupWord::cast(token.parent())
+ .filter(|group| context.is_inside_latex_curly(group))?;
+ if !matches!(group.syntax().parent()?.kind(), latex::BEGIN | latex::END) {
+ return None;
+ }
+
+ let range = if token.kind() == latex::WORD {
+ token.text_range()
+ } else {
+ TextRange::empty(context.offset)
+ };
+
+ for document in &context.request.subset.documents {
+ if let Some(data) = document.data.as_latex() {
+ for name in data
+ .extras
+ .environment_names
+ .iter()
+ .filter(|name| name.as_str() != token.text())
+ {
+ cancellation_token.result().ok()?;
+ items.push(InternalCompletionItem::new(
+ range,
+ InternalCompletionItemData::UserEnvironment { name },
+ ));
+ }
+ }
+ }
+
+ Some(())
+}
+
+#[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_user_environments(&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_user_environments(&context, &mut actual_items, CancellationToken::none());
+
+ assert!(actual_items.is_empty());
+ }
+
+ #[test]
+ fn test_latex_simple() {
+ let request = FeatureTester::builder()
+ .files(vec![(
+ "main.tex",
+ "\\begin{foo}\\end{foo} \\begin{bar}\\end{bar}",
+ )])
+ .main("main.tex")
+ .line(0)
+ .character(7)
+ .build()
+ .completion();
+
+ let context = CursorContext::new(request);
+ let mut actual_items = Vec::new();
+ complete_user_environments(&context, &mut actual_items, CancellationToken::none());
+
+ assert_eq!(actual_items.len(), 1);
+ for item in actual_items {
+ assert_eq!(item.range, TextRange::new(7.into(), 10.into()));
+ }
+ }
+}