feat: configure cursor distance from viewport edges

src/files.rs

@@ -93,6 +93,7 @@ pub struct FilePicker {
     tree_for_node: Vec<usize>,
     tree_roots: Vec<usize>,
     rows: Vec<VisibleRow>,
+    viewport_revision: u64,
     expanded: HashSet<usize>,
     filter_collapsed: HashSet<usize>,
     saved_selection: [Option<usize>; 2],
@@ -298,6 +299,7 @@ impl FilePicker {
             tree: Vec::new(),
             tree_roots: Vec::new(),
             rows: Vec::new(),
+            viewport_revision: 0,
             expanded: HashSet::new(),
             filter_collapsed: HashSet::new(),
             saved_selection: [None, None],
@@ -346,6 +348,10 @@ impl FilePicker {
         tree
     }
 
+    pub(crate) fn viewport_revision(&self) -> u64 {
+        self.viewport_revision
+    }
+
     pub fn entries(&self) -> impl ExactSizeIterator<Item = FileRow<'_>> + '_ {
         self.rows.iter().map(|row| {
             let node = &self.nodes[row.node];
@@ -542,6 +548,8 @@ impl FilePicker {
     }
 
     fn project(&mut self, selected: Option<usize>, select_match: bool) {
+        static NEXT_REVISION: std::sync::atomic::AtomicU64 = std::sync::atomic::AtomicU64::new(1);
+        self.viewport_revision = NEXT_REVISION.fetch_add(1, std::sync::atomic::Ordering::Relaxed);
         let query = self.query.to_lowercase();
         let tokens: Vec<_> = query.split_whitespace().collect();
         let matches = |node: &Node| tokens.iter().all(|token| node.search_label.contains(token));