Better sorting in picker in case of ties (#5169)

helix-term/src/ui/mod.rs

@@ -207,13 +207,14 @@ pub fn file_picker(root: PathBuf, config: &helix_view::editor::Config) -> FilePi
 
     // Cap the number of files if we aren't in a git project, preventing
     // hangs when using the picker in your home directory
-    let files: Vec<_> = if root.join(".git").exists() {
+    let mut files: Vec<PathBuf> = if root.join(".git").exists() {
         files.collect()
     } else {
         // const MAX: usize = 8192;
         const MAX: usize = 100_000;
         files.take(MAX).collect()
     };
+    files.sort();
 
     log::debug!("file_picker init {:?}", Instant::now().duration_since(now));
 

helix-term/src/ui/picker.rs

@@ -12,7 +12,10 @@ use tui::{
 use fuzzy_matcher::skim::SkimMatcherV2 as Matcher;
 use tui::widgets::Widget;
 
-use std::{cmp::Ordering, time::Instant};
+use std::{
+    cmp::{self, Ordering},
+    time::Instant,
+};
 use std::{collections::HashMap, io::Read, path::PathBuf};
 
 use crate::ui::{Prompt, PromptEvent};
@@ -344,11 +347,17 @@ impl<T: Item + 'static> Component for FilePicker<T> {
 
 #[derive(PartialEq, Eq, Debug)]
 struct PickerMatch {
-    index: usize,
     score: i64,
+    index: usize,
     len: usize,
 }
 
+impl PickerMatch {
+    fn key(&self) -> impl Ord {
+        (cmp::Reverse(self.score), self.len, self.index)
+    }
+}
+
 impl PartialOrd for PickerMatch {
     fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
         Some(self.cmp(other))
@@ -357,10 +366,7 @@ impl PartialOrd for PickerMatch {
 
 impl Ord for PickerMatch {
     fn cmp(&self, other: &Self) -> Ordering {
-        self.score
-            .cmp(&other.score)
-            .reverse()
-            .then_with(|| self.len.cmp(&other.len))
+        self.key().cmp(&other.key())
     }
 }
 
@@ -502,6 +508,7 @@ impl<T: Item> Picker<T> {
                         })
                 }),
         );
+
         self.matches.sort_unstable();
     }