From c4f76bd778c44a94a098151562a6743d26dd5c72 Mon Sep 17 00:00:00 2001
From: sxyazi <sxyazi@gmail.com>
Date: Fri, 25 Aug 2023 13:15:26 +0800
Subject: [PATCH] ..

---
 config/preset/keymap.toml            |  3 +++
 core/src/manager/preview/provider.rs | 13 +++++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/config/preset/keymap.toml b/config/preset/keymap.toml
index ae7cc053..960c26e0 100644
--- a/config/preset/keymap.toml
+++ b/config/preset/keymap.toml
@@ -19,6 +19,9 @@ keymap = [
 	{ on = [ "H" ], exec = "back" },
 	{ on = [ "L" ], exec = "forward" },
 
+	{ on = [ "<C-k>" ], exec = "peek -5" },
+	{ on = [ "<C-j>" ], exec = "peek 5" },
+
 	{ on = [ "<Up>" ], exec = "arrow -1" },
 	{ on = [ "<Down>" ], exec = "arrow 1" },
 	{ on = [ "<Left>" ], exec = "leave" },
diff --git a/core/src/manager/preview/provider.rs b/core/src/manager/preview/provider.rs
index 43fc48c3..dd52fb1c 100644
--- a/core/src/manager/preview/provider.rs
+++ b/core/src/manager/preview/provider.rs
@@ -106,27 +106,28 @@ impl Provider {
 			let mut buf = String::new();
 
 			let mut i = 0;
-			let mut limit = MANAGER.layout.preview_height();
-			while limit > 0 && h.reader.read_line(&mut line)? > 0 {
+			let limit = MANAGER.layout.preview_height();
+			while h.reader.read_line(&mut line)? > 0 {
 				if tick != INCR.load(Ordering::Relaxed) {
 					return Err("Preview cancelled".into());
 				}
 
 				i += 1;
-				if i <= skip {
+				if i > skip + limit {
+					break;
+				} else if i <= skip {
 					line.clear();
 					continue;
 				}
 
-				limit -= 1;
 				line = line.replace('\t', &spaces);
 				let regions = h.highlight_lines.highlight_line(&line, syntaxes).map_err(|e| anyhow!(e))?;
 				buf.push_str(&as_24_bit_terminal_escaped(&regions, false));
 				line.clear();
 			}
 
-			if buf.is_empty() {
-				return Err(PagedError::Exceed(i));
+			if skip > 0 && i < skip + limit {
+				return Err(PagedError::Exceed(i.saturating_sub(limit)));
 			}
 
 			buf.push_str("\x1b[0m");