From bc0e527f32642cc9eb2354d1bdc033ab6beca33b Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Thu, 18 Oct 2018 07:57:57 +0000
Subject: Support for extended underline styles on terminals which offer them,
 enabled by adding the Smulx capability with terminal-overrides (add something
 like ',vte*:Smulx=\E[4\:%p1%dm'). GitHub issue 1492.

---
 attributes.c | 56 +++++++++++++++++++++++++++++++++++---------------------
 1 file changed, 35 insertions(+), 21 deletions(-)

(limited to 'attributes.c')

diff --git a/attributes.c b/attributes.c
index 1e45e584..1b831733 100644
--- a/attributes.c
+++ b/attributes.c
@@ -25,13 +25,13 @@
 const char *
 attributes_tostring(int attr)
 {
-	static char	buf[128];
+	static char	buf[512];
 	size_t		len;
 
 	if (attr == 0)
 		return ("none");
 
-	len = xsnprintf(buf, sizeof buf, "%s%s%s%s%s%s%s%s",
+	len = xsnprintf(buf, sizeof buf, "%s%s%s%s%s%s%s%s%s%s%s%s",
 	    (attr & GRID_ATTR_BRIGHT) ? "bright," : "",
 	    (attr & GRID_ATTR_DIM) ? "dim," : "",
 	    (attr & GRID_ATTR_UNDERSCORE) ? "underscore," : "",
@@ -39,7 +39,11 @@ attributes_tostring(int attr)
 	    (attr & GRID_ATTR_REVERSE) ? "reverse," : "",
 	    (attr & GRID_ATTR_HIDDEN) ? "hidden," : "",
 	    (attr & GRID_ATTR_ITALICS) ? "italics," : "",
-	    (attr & GRID_ATTR_STRIKETHROUGH) ? "strikethrough," : "");
+	    (attr & GRID_ATTR_STRIKETHROUGH) ? "strikethrough," : "",
+	    (attr & GRID_ATTR_UNDERSCORE_2) ? "double-underscore," : "",
+	    (attr & GRID_ATTR_UNDERSCORE_3) ? "curly-underscore," : "",
+	    (attr & GRID_ATTR_UNDERSCORE_4) ? "dotted-underscore," : "",
+	    (attr & GRID_ATTR_UNDERSCORE_5) ? "dashed-underscore," : "");
 	if (len > 0)
 		buf[len - 1] = '\0';
 
@@ -52,6 +56,25 @@ attributes_fromstring(const char *str)
 	const char	delimiters[] = " ,|";
 	int		attr;
 	size_t		end;
+	u_int		i;
+	struct {
+		const char*	name;
+		int		attr;
+	} table[] = {
+		{ "bright", GRID_ATTR_BRIGHT },
+		{ "bold", GRID_ATTR_BRIGHT },
+		{ "dim", GRID_ATTR_DIM },
+		{ "underscore", GRID_ATTR_UNDERSCORE },
+		{ "blink", GRID_ATTR_BLINK },
+		{ "reverse", GRID_ATTR_REVERSE },
+		{ "hidden", GRID_ATTR_HIDDEN },
+		{ "italics", GRID_ATTR_ITALICS },
+		{ "strikethrough", GRID_ATTR_STRIKETHROUGH },
+		{ "double-underscore", GRID_ATTR_UNDERSCORE_2 },
+		{ "curly-underscore", GRID_ATTR_UNDERSCORE_3 },
+		{ "dotted-underscore", GRID_ATTR_UNDERSCORE_4 },
+		{ "dashed-underscore", GRID_ATTR_UNDERSCORE_5 }
+	};
 
 	if (*str == '\0' || strcspn(str, delimiters) == 0)
 		return (-1);
@@ -64,24 +87,15 @@ attributes_fromstring(const char *str)
 	attr = 0;
 	do {
 		end = strcspn(str, delimiters);
-		if ((end == 6 && strncasecmp(str, "bright", end) == 0) ||
-		    (end == 4 && strncasecmp(str, "bold", end) == 0))
-			attr |= GRID_ATTR_BRIGHT;
-		else if (end == 3 && strncasecmp(str, "dim", end) == 0)
-			attr |= GRID_ATTR_DIM;
-		else if (end == 10 && strncasecmp(str, "underscore", end) == 0)
-			attr |= GRID_ATTR_UNDERSCORE;
-		else if (end == 5 && strncasecmp(str, "blink", end) == 0)
-			attr |= GRID_ATTR_BLINK;
-		else if (end == 7 && strncasecmp(str, "reverse", end) == 0)
-			attr |= GRID_ATTR_REVERSE;
-		else if (end == 6 && strncasecmp(str, "hidden", end) == 0)
-			attr |= GRID_ATTR_HIDDEN;
-		else if (end == 7 && strncasecmp(str, "italics", end) == 0)
-			attr |= GRID_ATTR_ITALICS;
-		else if (end == 13 && strncasecmp(str, "strikethrough", end) == 0)
-			attr |= GRID_ATTR_STRIKETHROUGH;
-		else
+		for (i = 0; i < nitems(table); i++) {
+			if (end != strlen(table[i].name))
+				continue;
+			if (strncasecmp(str, table[i].name, end) == 0) {
+				attr |= table[i].attr;
+				break;
+			}
+		}
+		if (i == nitems(table))
 			return (-1);
 		str += end + strspn(str + end, delimiters);
 	} while (*str != '\0');
-- 
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