[DGD]Switch colors On and Off

[Chris Kaczor]

Here is the code I use to handle colors - it seems to perform pretty well so
far.  I use this inside the kernel library code but it should be generic
enough to put into any other library.

The color syntax is {color setting:color setting:etc} - so an example string
would look like:

You are hit {red:blink}very{normal} hard!

The lowercase colors are foreground and the uppercase colors are
background - the tags should be able to go in just about any order inside
the brackets.

You should be able to alter this code a little bit and to have it work for
other color syntaxes instead.

The code also supports replacement strings (not fully tested or implemented
yet) so you can use a generic tag like {name} and the name of the person
viewing the string will be substituted in there.

The function could probably be optimized a little bit more but I haven't had
the inclination to try yet.  =)

Zor

-------

#define ESC  "\033"

string parse_string(string str)
    {
    string  first_part;
    string  second_part;
    string  color_tags;
    string  background;
    string  foreground;
    string  attributes;
    string  sequence;
    string  replacement;
    string  *tags;
    int     index;

    while (sscanf(str, "%s{%s}%s", first_part, color_tags, second_part) ==
3)
        {
        background = "";
        foreground = "";
        attributes = "";
        replacement = "";
        sequence = "";

        tags = explode(color_tags, ":");

        for (index = 0; index < sizeof(tags); index++)
            {
            switch (tags[index])
                {
                case "black":           foreground = "30";  break;
                case "red":             foreground = "31";  break;
                case "green":           foreground = "32";  break;
                case "yellow":          foreground = "33";  break;
                case "blue":            foreground = "34";  break;
                case "magenta":         foreground = "35";  break;
                case "cyan":            foreground = "36";  break;
                case "white":           foreground = "37";  break;
                case "normal":          foreground = "0";   break;

                case "BLACK":           background = "40";  break;
                case "RED":             background = "41";  break;
                case "GREEN":           background = "42";  break;
                case "YELLOW":          background = "43";  break;
                case "BLUE":            background = "44";  break;
                case "MAGENTA":         background = "45";  break;
                case "CYAN":            background = "46";  break;
                case "WHITE":           background = "47";  break;
                case "NORMAL":          background = "0";   break;

                case "bold":
				if (attributes != "") attributes = attributes + ";";
				attributes = attributes + "1";  break;
                case "italic":
				if (attributes != "") attributes = attributes + ";";
				attributes = attributes + "3";  break;
                case "underline":
				if (attributes != "") attributes = attributes + ";";
				attributes = attributes + "4";  break;
                case "blink":
				if (attributes != "") attributes = attributes + ";";
				attributes = attributes + "5";  break;
                case "reverse":
				if (attributes != "") attributes = attributes + ";";
				attributes = attributes + "7";  break;

		    case "name":            replacement = player->query_name();   break;
                }
            }

            if (attributes != "" && foreground != "")   attributes =
attributes + ";";
            if (foreground != "" && background != "")   foreground =
foreground + ";";

            if (attributes != "" || foreground != "" || background != "")
                sequence = ESC + "[" + attributes + foreground + background
+ "m";

            if (player->query_ansi_color())
                str = first_part + sequence + replacement + second_part;
            else
                str = first_part + replacement + second_part;
        }

    return str;
    }


-----Original Message-----
From: dgd-admin at list.imaginary.com
[mailto:dgd-admin at list.imaginary.com]On Behalf Of Risto Karjalainen
Sent: Friday, November 24, 2000 4:05 AM
To: dgd at list.imaginary.com
Subject: Re: [DGD]Switch colors On and Off


| I solved this by adding hooks into user->catch_tell (I use 2.4.5 mudlib)
| It calls the player->creplace(str) function to replace certain colour
| codes (such things as ^R for red, ^G for green etc) with the proper ansi
| sequences, or with nothing at all if no colour is required.

Isn't that terribly slow?! I tried this too on my codebase but I started
getting Too long evaluations more than I could handle so I gave up the idea.
Maybe my code was a bit too unoptimized and hack. Anyway, I'm curious how
you handle this.

Regards,
Risto Karjalainen



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