language: Fix completion menu no longer prioritizes relevant items for Typescript and Python (#42065)

Closes #41672

Regressed in https://github.com/zed-industries/zed/pull/40242

Release Notes:

- Fixed issue where completion menu no longer prioritizes relevant items
for TypeScript and Python.

crates/language/src/language.rs

@@ -2324,17 +2324,19 @@ impl CodeLabel {
     }
 
     pub fn plain(text: String, filter_text: Option<&str>) -> Self {
-        Self::filtered(text, filter_text, Vec::new())
+        Self::filtered(text.clone(), text.len(), filter_text, Vec::new())
     }
 
     pub fn filtered(
         text: String,
+        label_len: usize,
         filter_text: Option<&str>,
         runs: Vec<(Range<usize>, HighlightId)>,
     ) -> Self {
+        assert!(label_len <= text.len());
         let filter_range = filter_text
             .and_then(|filter| text.find(filter).map(|ix| ix..ix + filter.len()))
-            .unwrap_or(0..text.len());
+            .unwrap_or(0..label_len);
         Self::new(text, filter_range, runs)
     }
 

crates/languages/src/python.rs

@@ -406,6 +406,7 @@ impl LspAdapter for PyrightLspAdapter {
         language: &Arc<language::Language>,
     ) -> Option<language::CodeLabel> {
         let label = &item.label;
+        let label_len = label.len();
         let grammar = language.grammar()?;
         let highlight_id = match item.kind? {
             lsp::CompletionItemKind::METHOD => grammar.highlight_id_for_name("function.method"),
@@ -427,9 +428,10 @@ impl LspAdapter for PyrightLspAdapter {
         }
         Some(language::CodeLabel::filtered(
             text,
+            label_len,
             item.filter_text.as_deref(),
             highlight_id
-                .map(|id| (0..label.len(), id))
+                .map(|id| (0..label_len, id))
                 .into_iter()
                 .collect(),
         ))
@@ -1467,6 +1469,7 @@ impl LspAdapter for PyLspAdapter {
         language: &Arc<language::Language>,
     ) -> Option<language::CodeLabel> {
         let label = &item.label;
+        let label_len = label.len();
         let grammar = language.grammar()?;
         let highlight_id = match item.kind? {
             lsp::CompletionItemKind::METHOD => grammar.highlight_id_for_name("function.method")?,
@@ -1477,6 +1480,7 @@ impl LspAdapter for PyLspAdapter {
         };
         Some(language::CodeLabel::filtered(
             label.clone(),
+            label_len,
             item.filter_text.as_deref(),
             vec![(0..label.len(), highlight_id)],
         ))
@@ -1742,6 +1746,7 @@ impl LspAdapter for BasedPyrightLspAdapter {
         language: &Arc<language::Language>,
     ) -> Option<language::CodeLabel> {
         let label = &item.label;
+        let label_len = label.len();
         let grammar = language.grammar()?;
         let highlight_id = match item.kind? {
             lsp::CompletionItemKind::METHOD => grammar.highlight_id_for_name("function.method"),
@@ -1763,6 +1768,7 @@ impl LspAdapter for BasedPyrightLspAdapter {
         }
         Some(language::CodeLabel::filtered(
             text,
+            label_len,
             item.filter_text.as_deref(),
             highlight_id
                 .map(|id| (0..label.len(), id))

crates/languages/src/typescript.rs

@@ -754,7 +754,7 @@ impl LspAdapter for TypeScriptLspAdapter {
         language: &Arc<language::Language>,
     ) -> Option<language::CodeLabel> {
         use lsp::CompletionItemKind as Kind;
-        let len = item.label.len();
+        let label_len = item.label.len();
         let grammar = language.grammar()?;
         let highlight_id = match item.kind? {
             Kind::CLASS | Kind::INTERFACE | Kind::ENUM => grammar.highlight_id_for_name("type"),
@@ -779,8 +779,9 @@ impl LspAdapter for TypeScriptLspAdapter {
         };
         Some(language::CodeLabel::filtered(
             text,
+            label_len,
             item.filter_text.as_deref(),
-            vec![(0..len, highlight_id)],
+            vec![(0..label_len, highlight_id)],
         ))
     }
 

crates/languages/src/vtsls.rs

@@ -178,7 +178,7 @@ impl LspAdapter for VtslsLspAdapter {
         language: &Arc<language::Language>,
     ) -> Option<language::CodeLabel> {
         use lsp::CompletionItemKind as Kind;
-        let len = item.label.len();
+        let label_len = item.label.len();
         let grammar = language.grammar()?;
         let highlight_id = match item.kind? {
             Kind::CLASS | Kind::INTERFACE | Kind::ENUM => grammar.highlight_id_for_name("type"),
@@ -203,8 +203,9 @@ impl LspAdapter for VtslsLspAdapter {
         };
         Some(language::CodeLabel::filtered(
             text,
+            label_len,
             item.filter_text.as_deref(),
-            vec![(0..len, highlight_id)],
+            vec![(0..label_len, highlight_id)],
         ))
     }