basic path completion

1 files changed, 34 insertions, 0 deletions

diff --git a/src/completion.rs b/src/completion.rs
new file mode 100644
index 0000000..63ac866
--- /dev/null
+++ b/src/completion.rs
@@ -0,0 +1,34 @@
+use crate::*;
+use std::fs;
+
+pub struct Suggestion {
+    pub display: BString,
+    full: BString,
+}
+
+pub fn _path_completion(mut prefix: BString) -> io::Result<Vec<Suggestion>> {
+    let mut partial_entry = BString::new();
+    while let Some(c) = prefix.last().cloned() {
+        if c == b'/' {
+            break;
+        }
+        partial_entry.push(c);
+        prefix.pop();
+    }
+    partial_entry.reverse();
+
+    let mut sugs = Vec::new();
+
+    for entry in fs::read_dir(OsStr::from_bytes(&prefix))? {
+        let entry = entry?;
+        let name = entry.file_name().as_bytes().to_vec();
+        if name.starts_with(&partial_entry) {
+            sugs.push(Suggestion {
+                display: name,
+                full: entry.path().as_os_str().as_bytes().to_vec(),
+            });
+        }
+    }
+
+    Ok(sugs)
+}