From b6c70aa012713ab2e3aa06849a71b0997f915ad6 Mon Sep 17 00:00:00 2001
From: Diogo Duarte <dierduarte@gmail.com>
Date: Wed, 14 Feb 2024 20:15:38 +0000
Subject: [PATCH] feat: add `scrolloff` in `[manager]`

---
 yazi-config/preset/yazi.toml       |  1 +
 yazi-config/src/manager/manager.rs |  1 +
 yazi-core/src/folder/folder.rs     | 23 +++++++++++++++++++----
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/yazi-config/preset/yazi.toml b/yazi-config/preset/yazi.toml
index cd7d6787..d4eaf662 100644
--- a/yazi-config/preset/yazi.toml
+++ b/yazi-config/preset/yazi.toml
@@ -11,6 +11,7 @@ sort_dir_first = false
 linemode       = "none"
 show_hidden    = false
 show_symlink   = true
+scrolloff      = 5
 
 [preview]
 tab_size        = 2
diff --git a/yazi-config/src/manager/manager.rs b/yazi-config/src/manager/manager.rs
index 74b4c552..27f4acaa 100644
--- a/yazi-config/src/manager/manager.rs
+++ b/yazi-config/src/manager/manager.rs
@@ -19,6 +19,7 @@ pub struct Manager {
 	pub linemode:     String,
 	pub show_hidden:  bool,
 	pub show_symlink: bool,
+	pub scrolloff:    u8,
 }
 
 impl Default for Manager {
diff --git a/yazi-core/src/folder/folder.rs b/yazi-core/src/folder/folder.rs
index 49fd1c34..836d0f7b 100644
--- a/yazi-core/src/folder/folder.rs
+++ b/yazi-core/src/folder/folder.rs
@@ -1,7 +1,7 @@
 use std::{mem, time::SystemTime};
 
 use ratatui::layout::Rect;
-use yazi_config::LAYOUT;
+use yazi_config::{LAYOUT, MANAGER};
 use yazi_shared::fs::{File, FilesOp, Url};
 
 use super::FolderStage;
@@ -108,8 +108,15 @@ impl Folder {
 		let len = self.files.len();
 
 		let limit = LAYOUT.load().current.height as usize;
+		let half_screen = limit / 2;
+		let scrolloff = if MANAGER.scrolloff as usize > half_screen {
+			half_screen
+		} else {
+			MANAGER.scrolloff as usize
+		};
+
 		self.cursor = step.add(self.cursor, limit).min(len.saturating_sub(1));
-		self.offset = if self.cursor >= (self.offset + limit).min(len).saturating_sub(5) {
+		self.offset = if self.cursor >= (self.offset + limit).min(len).saturating_sub(scrolloff) {
 			len.saturating_sub(limit).min(self.offset + self.cursor - old.0)
 		} else {
 			self.offset.min(len.saturating_sub(1))
@@ -122,8 +129,16 @@ impl Folder {
 		let old = (self.cursor, self.offset);
 		let max = self.files.len().saturating_sub(1);
 
-		self.cursor = step.add(self.cursor, LAYOUT.load().current.height as usize).min(max);
-		self.offset = if self.cursor < self.offset + 5 {
+		let limit = LAYOUT.load().current.height as usize;
+		let half_screen = limit / 2;
+		let scrolloff = if MANAGER.scrolloff as usize > half_screen {
+			half_screen
+		} else {
+			MANAGER.scrolloff as usize
+		};
+
+		self.cursor = step.add(self.cursor, limit).min(max);
+		self.offset = if self.cursor < self.offset + scrolloff {
 			self.offset.saturating_sub(old.0 - self.cursor)
 		} else {
 			self.offset.min(max)