Add :tree-sitter-scopes, useful when developing indents.toml

1 files changed, 21 insertions, 0 deletions

diff --git a/helix-core/src/indent.rs b/helix-core/src/indent.rs
index d272dd68..9489baa7 100644
--- a/helix-core/src/indent.rs
+++ b/helix-core/src/indent.rs
@@ -313,6 +313,27 @@ pub fn suggested_indent_for_pos(
     }
 }
 
+pub fn get_scopes(syntax: Option<&Syntax>, text: RopeSlice, pos: usize) -> Vec<&'static str> {
+    let mut scopes = Vec::new();
+    if let Some(syntax) = syntax {
+        let byte_start = text.char_to_byte(pos);
+        let node = match get_highest_syntax_node_at_bytepos(syntax, byte_start) {
+            Some(node) => node,
+            None => return scopes,
+        };
+
+        scopes.push(node.kind());
+
+        while let Some(parent) = node.parent() {
+            scopes.push(parent.kind())
+        }
+    }
+
+    scopes.reverse();
+
+    return scopes;
+}
+
 #[cfg(test)]
 mod test {
     use super::*;