From 52e2095c8141d6f2a97870cc7967aadeb593b1be Mon Sep 17 00:00:00 2001
From: chleba <chlebik@gmail.com>
Date: Sat, 20 Apr 2024 03:44:30 +0200
Subject: [PATCH] fix scrollbar crash + add offset for input visual scroll

---
 src/components/discovery.rs | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/components/discovery.rs b/src/components/discovery.rs
index 2356937..b263d9a 100644
--- a/src/components/discovery.rs
+++ b/src/components/discovery.rs
@@ -281,9 +281,11 @@ impl Discovery {
     }
 
     fn set_scrollbar_height(&mut self) {
-        self.scrollbar_state = self
-            .scrollbar_state
-            .content_length(self.scanned_ips.len() - 1);
+        let mut ip_len = 0;
+        if self.scanned_ips.len() > 0 {
+            ip_len = self.scanned_ips.len() - 1;
+        }
+        self.scrollbar_state = self.scrollbar_state.content_length(ip_len);
     }
 
     fn previous_in_table(&mut self) {
@@ -560,7 +562,6 @@ impl Component for Discovery {
             // -- first time scan after setting of interface
             if self.active_interface.is_none() {
                 self.set_active_subnet(&intf);
-
             }
             self.active_interface = Some(intf);
         }
@@ -643,7 +644,8 @@ impl Component for Discovery {
                 input_size,
                 3,
             );
-            let scroll = self.input.visual_scroll(INPUT_SIZE);
+            // -- INPUT_SIZE - 3 is offset for border + 1char for cursor
+            let scroll = self.input.visual_scroll(INPUT_SIZE - 3);
             let mut block = self.make_input(scroll);
             if self.is_scanning {
                 block = block.clone().add_modifier(Modifier::DIM);