Query the client terminal for foreground and background colours and if

OSC 10 or 11 is received but no colour has been set inside tmux, return
the colour from the first attached client (probably most people will
have all light or or all dark terminals).

1 files changed, 41 insertions, 1 deletions

diff --git a/colour.c b/colour.c
index a282d182..9bde646f 100644
--- a/colour.c
+++ b/colour.c
@@ -960,6 +960,47 @@ colour_byname(const char *name)
 	return (-1);
 }
 
+/* Parse colour from an X11 string. */
+int
+colour_parseX11(const char *p)
+{
+	double	 c, m, y, k = 0;
+	u_int	 r, g, b;
+	size_t	 len = strlen(p);
+	int	 colour = -1;
+	char	*copy;
+
+	if ((len == 12 && sscanf(p, "rgb:%02x/%02x/%02x", &r, &g, &b) == 3) ||
+	    (len == 7 && sscanf(p, "#%02x%02x%02x", &r, &g, &b) == 3) ||
+	    sscanf(p, "%d,%d,%d", &r, &g, &b) == 3)
+		colour = colour_join_rgb(r, g, b);
+	else if ((len == 18 &&
+	    sscanf(p, "rgb:%04x/%04x/%04x", &r, &g, &b) == 3) ||
+	    (len == 13 && sscanf(p, "#%04x%04x%04x", &r, &g, &b) == 3))
+		colour = colour_join_rgb(r >> 8, g >> 8, b >> 8);
+	else if ((sscanf(p, "cmyk:%lf/%lf/%lf/%lf", &c, &m, &y, &k) == 4 ||
+	    sscanf(p, "cmy:%lf/%lf/%lf", &c, &m, &y) == 3) &&
+	    c >= 0 && c <= 1 && m >= 0 && m <= 1 &&
+	    y >= 0 && y <= 1 && k >= 0 && k <= 1) {
+		colour = colour_join_rgb(
+		    (1 - c) * (1 - k) * 255,
+		    (1 - m) * (1 - k) * 255,
+		    (1 - y) * (1 - k) * 255);
+	} else {
+		while (len != 0 && *p == ' ') {
+			p++;
+			len--;
+		}
+		while (len != 0 && p[len - 1] == ' ')
+			len--;
+		copy = xstrndup(p, len);
+		colour = colour_byname(copy);
+		free(copy);
+	}
+	log_debug("%s: %s = %s", __func__, p, colour_tostring(colour));
+	return (colour);
+}
+
 /* Initialize palette. */
 void
 colour_palette_init(struct colour_palette *p)
@@ -1069,5 +1110,4 @@ colour_palette_from_option(struct colour_palette *p, struct options *oo)
 		}
 		a = options_array_next(a);
 	}
-
 }