Add file explorer and tree helper

ref: https://github.com/helix-editor/helix/issues/200
ref: https://github.com/helix-editor/helix/pull/2377
ref: https://github.com/helix-editor/helix/pull/5566
ref: https://github.com/helix-editor/helix/pull/5768

Co-authored-by: cossonleo <cossonleo@foxmail.com>
Co-authored-by: wongjiahau <hou32hou@gmail.com>

1 files changed, 1 insertions, 20 deletions

diff --git a/helix-term/src/ui/overlay.rs b/helix-term/src/ui/overlay.rs
index ff184d40..7b9c0391 100644
--- a/helix-term/src/ui/overlay.rs
+++ b/helix-term/src/ui/overlay.rs
@@ -19,26 +19,7 @@ pub struct Overlay<T> {
 pub fn overlaid<T>(content: T) -> Overlay<T> {
     Overlay {
         content,
-        calc_child_size: Box::new(|rect: Rect| clip_rect_relative(rect.clip_bottom(2), 90, 90)),
-    }
-}
-
-fn clip_rect_relative(rect: Rect, percent_horizontal: u8, percent_vertical: u8) -> Rect {
-    fn mul_and_cast(size: u16, factor: u8) -> u16 {
-        ((size as u32) * (factor as u32) / 100).try_into().unwrap()
-    }
-
-    let inner_w = mul_and_cast(rect.width, percent_horizontal);
-    let inner_h = mul_and_cast(rect.height, percent_vertical);
-
-    let offset_x = rect.width.saturating_sub(inner_w) / 2;
-    let offset_y = rect.height.saturating_sub(inner_h) / 2;
-
-    Rect {
-        x: rect.x + offset_x,
-        y: rect.y + offset_y,
-        width: inner_w,
-        height: inner_h,
+        calc_child_size: Box::new(|rect: Rect| rect.overlaid()),
     }
 }