vis: experimental support for lua/lpeg based syntax highlighting

The lua based lexers are searched in the following order:

 $VIS_PATH/lexers
 $HOME/.vis/lexers
 /usr/share/vis/lexers

followed by the standard lua package.path

1 files changed, 8 insertions, 1 deletions

diff --git a/ui.h b/ui.h
index 8c94d51..656f5a8 100644
--- a/ui.h
+++ b/ui.h
@@ -23,7 +23,14 @@ enum UiOption {
 	UI_OPTION_SYMBOL_EOF = 1 << 6,
 };
 
-#define UI_STYLES_MAX 64
+enum UiStyles {
+	UI_STYLE_LEXER_MAX = 64,
+	UI_STYLE_DEFAULT,
+	UI_STYLE_CURSOR,
+	UI_STYLE_SELECTION,
+	UI_STYLE_LINENUMBER,
+	UI_STYLE_MAX,
+};
 
 #include "text.h"
 #include "view.h"