1 files changed, 17 insertions, 0 deletions

diff --git a/src/client/ui.rs b/src/client/ui.rs
index 493f660..11cedc7 100644
--- a/src/client/ui.rs
+++ b/src/client/ui.rs
@@ -257,6 +257,23 @@ pub fn input_cursor_column(prompt_len: usize, input_len: usize) -> u16 {
         .min(u16::MAX as usize) as u16
 }
 
+/// Number of terminal rows a block of logical lines occupies after wrapping.
+/// Empty lines still occupy one row.
+pub fn visual_line_count(lines: &[String], width: usize) -> usize {
+    let width = width.max(1);
+    lines
+        .iter()
+        .map(|line| {
+            let columns = display_width(line);
+            if columns == 0 {
+                1
+            } else {
+                columns.div_ceil(width)
+            }
+        })
+        .sum()
+}
+
 /// Format a ping round-trip time with one decimal place.
 pub fn format_pong(elapsed: std::time::Duration) -> String {
     format!("Pong ({:.1}ms)", elapsed.as_secs_f64() * 1000.0)