From 14bc04d6bbe900b52b84cc35dc56ebeb1a71e944 Mon Sep 17 00:00:00 2001
From: bjorndm <bjorn.de.meyer@gmail.com>
Date: Sat, 12 Aug 2023 23:12:42 +0900
Subject: [PATCH] Fix underlines in Windows console mode.

The ENABLE_LVB_GRID_WORLDWIDE is neede to enable them.
---
 console_win.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/console_win.go b/console_win.go
index 5f0063e2..d2307f82 100644
--- a/console_win.go
+++ b/console_win.go
@@ -231,7 +231,7 @@ func (s *cScreen) Init() error {
 	// 24-bit color is opt-in for now, because we can't figure out
 	// to make it work consistently.
 	if s.truecolor {
-		s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut)
+		s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut | modeUnderline)
 		var om uint32
 		s.getOutMode(&om)
 		if om&modeVtOutput == modeVtOutput {
@@ -334,7 +334,7 @@ func (s *cScreen) engage() error {
 	s.enableMouse(s.mouseEnabled)
 
 	if s.vten {
-		s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut)
+		s.setOutMode(modeVtOutput | modeNoAutoNL | modeCookedOut | modeUnderline)
 	} else {
 		s.setOutMode(0)
 	}
@@ -1213,6 +1213,8 @@ const (
 	modeCookedOut uint32 = 0x0001
 	modeVtOutput         = 0x0004
 	modeNoAutoNL         = 0x0008
+	// ENABLE_LVB_GRID_WORLDWIDE, needed to make underlines actually work.
+	modeUnderline        = 0x0010
 	// modeWrapEOL          = 0x0002
 )