From 07a2c19b9d298617586f98561754d0a241c7a473 Mon Sep 17 00:00:00 2001
From: CJ van den Berg <cj@vdbonline.com>
Date: Fri, 18 Apr 2025 21:41:01 +0200
Subject: [PATCH] fix: side scrolling of highlight_columns

---
 src/tui/editor.zig | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/tui/editor.zig b/src/tui/editor.zig
index ceb6c1d..f1ff62b 100644
--- a/src/tui/editor.zig
+++ b/src/tui/editor.zig
@@ -1137,7 +1137,11 @@ pub const Editor = struct {
         defer frame.deinit();
         const hl_cols: []const u16 = tui.highlight_columns();
         const alpha: u8 = tui.config().highlight_columns_alpha;
-        for (hl_cols) |hl_col| {
+        const offset = self.view.col;
+        for (hl_cols) |hl_col_| {
+            if (hl_col_ < offset) continue;
+            const hl_col = hl_col_ - offset;
+            if (hl_col > self.view.cols) continue;
             for (0..self.view.rows) |row| for (0..self.view.cols) |col|
                 if (hl_col > 0 and hl_col <= col) {
                     self.plane.cursor_move_yx(@intCast(row), @intCast(col)) catch return;