Adapt layout sizes

Prevent negative usize errors to stop the program.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/gui/util.rs b/src/gui/util.rs
index c62c755..4503ed4 100644
--- a/src/gui/util.rs
+++ b/src/gui/util.rs
@@ -14,8 +14,8 @@ pub fn title(str: &str) -> Paragraph {
 
 pub fn center_vertically(chunk: Rect, text: &str) -> String {
     let text_lines = text.lines().count();
-    let chunk_inner_lines: usize = (chunk.height - 2).into();
-    let blank_lines = chunk_inner_lines - text_lines;
+    let chunk_inner_lines: usize = if chunk.height >= 2 { (chunk.height - 2).into() } else { 0 };
+    let blank_lines = if chunk_inner_lines >= text_lines { chunk_inner_lines - text_lines } else { 0 };
     let newlines = "\n".repeat(blank_lines / 2);
     format!("{newlines}{text}")
 }