Hide all dot-prefixed files from directory listings

This is a temporary fix to make directories more navigable. This will
be removed when Cobalt can hide dot-prefixed filenames from directory
listings by itself.

1 files changed, 20 insertions, 0 deletions

diff --git a/src/devices/file/directory_listing.rs b/src/devices/file/directory_listing.rs
index 1295f8b..c894306 100644
--- a/src/devices/file/directory_listing.rs
+++ b/src/devices/file/directory_listing.rs
@@ -30,6 +30,9 @@ impl DirectoryListing {
                 if byte_path.len() > 255 {
                     continue;
                 };
+                if filename_dot_prefixed(&path) {
+                    continue;
+                }
                 let metadata = continue_on_err!(std::fs::metadata(&entry.path()));
                 children.push( DirectoryChild {
                     byte_path: Vec::from(byte_path),
@@ -106,3 +109,20 @@ pub fn remove_base(absolute_path: &Path, base_path: &Path) -> Result<PathBuf, ()
     }
     return Err(());
 }
+
+// Returns true if a dot character directly follows the right-most
+// forward-slash character in the path.
+fn filename_dot_prefixed(path: &Path) -> bool {
+    let bytes = path.as_os_str().as_bytes();
+    // Find position of final forward-slash byte.
+    let mut final_slash = None;
+    for (i, byte) in bytes.iter().enumerate() {
+        if *byte == b'/' { final_slash = Some(i) }
+    }
+    if let Some(i) = final_slash {
+        if let Some(b'.') = bytes.get(i+1) {
+            return true;
+        }
+    }
+    return false;
+}