ui: refactor syntax style definitions

Styles can now be specified as strings which will make them
easier to specify from outside the editor.

The following style attributes can be given in a comma separated
list:

 bold
 italics
 underlined
 fore:color
 back:color

where color is either a hex value of the form #aabbcc or one
of the predefined colors:

 black
 red
 green
 yellow
 blue
 magenta
 cyan
 white

1 files changed, 3 insertions, 7 deletions

diff --git a/syntax.h b/syntax.h
index c28a7ea..8ce623e 100644
--- a/syntax.h
+++ b/syntax.h
@@ -4,20 +4,15 @@
 #include <regex.h>
 
 typedef struct {
-	short fg, bg;   /* fore and background color */
-	int attr;       /* curses attributes */
-} Color;
-
-typedef struct {
 	char *rule;     /* regex to search for */
-	Color *color;   /* settings to apply in case of a match */
+	int style;      /* settings to apply in case of a match */
 	bool multiline; /* whether . should match new lines */
 	regex_t regex;  /* compiled form of the above rule */
 } SyntaxRule;
 
 typedef struct {
 	char *symbol;
-	Color *color;
+	int style;
 } SyntaxSymbol;
 
 enum {
@@ -35,6 +30,7 @@ struct Syntax {               /* a syntax definition */
 	char *file;           /* apply to files matching this regex */
 	regex_t file_regex;   /* compiled file name regex */
 	const char **settings;/* settings associated with this file type */
+	const char **styles;  /* settings associated with this file type */
 	SyntaxSymbol symbols[SYNTAX_SYMBOL_LAST]; /* symbols for white space handling */
 	SyntaxRule rules[24]; /* all rules for this file type */
 };