From 4a7587931ce54aa1a94a104480113d658c295b6b Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Wed, 15 Apr 2015 22:34:46 +0000
Subject: [PATCH] Fix some issues in bright colour handling. Bold background
 doesn't exist so there is no reason for tty_check_bg to mess with the BRIGHT
 flag at all, ever. Also use aixterm colours for 256-to-16 translation if the
 terminal supports them. And there is no reason for tty_colours_bg to worry
 about whether the terminal supports them - tty_check_bg has already taken
 care of it.

---
 tty.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/tty.c b/tty.c
index 05d422d0..83ae8282 100644
--- a/tty.c
+++ b/tty.c
@@ -1453,6 +1453,8 @@ tty_check_fg(struct tty *tty, struct grid_cell *gc)
 {
 	u_int	colours;
 
+	colours = tty_term_number(tty->term, TTYC_COLORS);
+
 	/* Is this a 256-colour colour? */
 	if (gc->flags & GRID_FLAG_FG256) {
 		/* And not a 256 colour mode? */
@@ -1461,7 +1463,10 @@ tty_check_fg(struct tty *tty, struct grid_cell *gc)
 			gc->fg = colour_256to16(gc->fg);
 			if (gc->fg & 8) {
 				gc->fg &= 7;
-				gc->attr |= GRID_ATTR_BRIGHT;
+				if (colours >= 16)
+					gc->fg += 90;
+				else
+					gc->attr |= GRID_ATTR_BRIGHT;
 			} else
 				gc->attr &= ~GRID_ATTR_BRIGHT;
 			gc->flags &= ~GRID_FLAG_FG256;
@@ -1470,7 +1475,6 @@ tty_check_fg(struct tty *tty, struct grid_cell *gc)
 	}
 
 	/* Is this an aixterm colour? */
-	colours = tty_term_number(tty->term, TTYC_COLORS);
 	if (gc->fg >= 90 && gc->fg <= 97 && colours < 16) {
 		gc->fg -= 90;
 		gc->attr |= GRID_ATTR_BRIGHT;
@@ -1482,6 +1486,8 @@ tty_check_bg(struct tty *tty, struct grid_cell *gc)
 {
 	u_int	colours;
 
+	colours = tty_term_number(tty->term, TTYC_COLORS);
+
 	/* Is this a 256-colour colour? */
 	if (gc->flags & GRID_FLAG_BG256) {
 		/*
@@ -1492,20 +1498,19 @@ tty_check_bg(struct tty *tty, struct grid_cell *gc)
 		if (!(tty->term->flags & TERM_256COLOURS) &&
 		    !(tty->term_flags & TERM_256COLOURS)) {
 			gc->bg = colour_256to16(gc->bg);
-			if (gc->bg & 8)
+			if (gc->bg & 8) {
 				gc->bg &= 7;
-			gc->attr &= ~GRID_ATTR_BRIGHT;
+				if (colours >= 16)
+					gc->fg += 90;
+			}
 			gc->flags &= ~GRID_FLAG_BG256;
 		}
 		return;
 	}
 
 	/* Is this an aixterm colour? */
-	colours = tty_term_number(tty->term, TTYC_COLORS);
-	if (gc->bg >= 90 && gc->bg <= 97 && colours < 16) {
+	if (gc->bg >= 90 && gc->bg <= 97 && colours < 16)
 		gc->bg -= 90;
-		gc->attr |= GRID_ATTR_BRIGHT;
-	}
 }
 
 void
@@ -1559,14 +1564,9 @@ tty_colours_bg(struct tty *tty, const struct grid_cell *gc)
 
 	/* Is this an aixterm bright colour? */
 	if (bg >= 90 && bg <= 97) {
-		/* 16 colour terminals or above only. */
-		if (tty_term_number(tty->term, TTYC_COLORS) >= 16) {
-			xsnprintf(s, sizeof s, "\033[%dm", bg + 10);
-			tty_puts(tty, s);
-			goto save_bg;
-		}
-		bg -= 90;
-		/* no such thing as a bold background */
+		xsnprintf(s, sizeof s, "\033[%dm", bg + 10);
+		tty_puts(tty, s);
+		goto save_bg;
 	}
 
 	/* Otherwise set the background colour. */