parse_color: recognize "no$foo" to clear the $foo attribute

diff --git a/color.c b/color.c
index 3afda9d9dc20b184f1bc1450c0a734c67fc0bfda..e2a0a99164cf340eac0190974cad66eed335f547 100644 (file)
--- a/color.c
+++ b/color.c
@@ -32,10 +32,13 @@ struct color {
                COLOR_UNSPECIFIED = 0,
                COLOR_NORMAL,
                COLOR_ANSI, /* basic 0-7 ANSI colors */
-               COLOR_256
+               COLOR_256,
+               COLOR_RGB
        } type;
        /* The numeric value for ANSI and 256-color modes */
        unsigned char value;
+       /* 24-bit RGB color values */
+       unsigned char red, green, blue;
 };
 
 /*
@@ -47,6 +50,16 @@ static int match_word(const char *word, int len, const char *match)
        return !strncasecmp(word, match, len) && !match[len];
 }
 
+static int get_hex_color(const char *in, unsigned char *out)
+{
+       unsigned int val;
+       val = (hexval(in[0]) << 4) | hexval(in[1]);
+       if (val & ~0xff)
+               return -1;
+       *out = val;
+       return 0;
+}
+
 static int parse_color(struct color *out, const char *name, int len)
 {
        /* Positions in array must match ANSI color codes */
@@ -64,6 +77,16 @@ static int parse_color(struct color *out, const char *name, int len)
                return 0;
        }
 
+       /* Try a 24-bit RGB value */
+       if (len == 7 && name[0] == '#') {
+               if (!get_hex_color(name + 1, &out->red) &&
+                   !get_hex_color(name + 3, &out->green) &&
+                   !get_hex_color(name + 5, &out->blue)) {
+                       out->type = COLOR_RGB;
+                       return 0;
+               }
+       }
+
        /* Then pick from our human-readable color names... */
        for (i = 0; i < ARRAY_SIZE(color_names); i++) {
                if (match_word(name, len, color_names[i])) {
@@ -101,9 +124,11 @@ static int parse_color(struct color *out, const char *name, int len)
 
 static int parse_attr(const char *name, int len)
 {
-       static const int attr_values[] = { 1, 2, 4, 5, 7 };
+       static const int attr_values[] = { 1, 2, 4, 5, 7,
+                                          22, 22, 24, 25, 27 };
        static const char * const attr_names[] = {
-               "bold", "dim", "ul", "blink", "reverse"
+               "bold", "dim", "ul", "blink", "reverse",
+               "nobold", "nodim", "noul", "noblink", "noreverse"
        };
        int i;
        for (i = 0; i < ARRAY_SIZE(attr_names); i++) {
@@ -140,6 +165,10 @@ static char *color_output(char *out, const struct color *c, char type)
        case COLOR_256:
                out += sprintf(out, "%c8;5;%d", type, c->value);
                break;
+       case COLOR_RGB:
+               out += sprintf(out, "%c8;2;%d;%d;%d", type,
+                              c->red, c->green, c->blue);
+               break;
        }
        return out;
 }
@@ -211,7 +240,7 @@ int color_parse_mem(const char *value, int value_len, char *dst)
                        attr &= ~bit;
                        if (sep++)
                                *dst++ = ';';
-                       *dst++ = '0' + i;
+                       dst += sprintf(dst, "%d", i);
                }
                if (!color_empty(&fg)) {
                        if (sep++)