mirror of
https://github.com/ergochat/ergo.git
synced 2024-12-23 11:12:44 +01:00
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
// written by Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the ISC license
|
|
|
|
/*
|
|
Package ircfmt handles IRC formatting codes, escaping and unescaping.
|
|
|
|
This allows for a simpler representation of strings that contain colour codes,
|
|
bold codes, and such, without having to write and handle raw bytes when
|
|
assembling outgoing messages.
|
|
|
|
This lets you turn raw IRC messages into our escaped versions, and turn escaped
|
|
versions back into raw messages suitable for sending on IRC connections. This
|
|
is designed to be used on things like PRIVMSG / NOTICE commands, MOTD blocks,
|
|
and such.
|
|
|
|
The escape character we use in this library is the dollar sign ("$"), along
|
|
with the given escape characters:
|
|
|
|
--------------------------------
|
|
Name | Escape | Raw
|
|
--------------------------------
|
|
Dollarsign | $$ | $
|
|
Bold | $b | 0x02
|
|
Colour | $c | 0x03
|
|
Monospace | $m | 0x11
|
|
Reverse Colour | $v | 0x16
|
|
Italic | $i | 0x1d
|
|
Strikethrough | $s | 0x1e
|
|
Underscore | $u | 0x1f
|
|
Reset | $r | 0x0f
|
|
--------------------------------
|
|
|
|
Colours are escaped in a slightly different way, using the actual names of them
|
|
rather than just the raw numbers.
|
|
|
|
In our escaped format, the colours for the fore and background are contained in
|
|
square brackets after the colour ("$c") escape. For example:
|
|
|
|
Red foreground:
|
|
Escaped: This is a $c[red]cool message!
|
|
Raw: This is a 0x034cool message!
|
|
|
|
Blue foreground, green background:
|
|
Escaped: This is a $c[blue,green]rad message!
|
|
Raw: This is a 0x032,3rad message!
|
|
|
|
When assembling a raw message, we make sure to use the full colour code
|
|
("02" vs just "2") when it could become confused due to numbers just after the
|
|
colour escape code. For instance, lines like this will be unescaped correctly:
|
|
|
|
No number after colour escape:
|
|
Escaped: This is a $c[red]cool message!
|
|
Raw: This is a 0x034cool message!
|
|
|
|
Number after colour escape:
|
|
Escaped: This is $c[blue]20% cooler!
|
|
Raw: This is 0x030220% cooler
|
|
|
|
Here are the colour names and codes we recognise:
|
|
|
|
--------------------
|
|
Code | Name
|
|
--------------------
|
|
00 | white
|
|
01 | black
|
|
02 | blue
|
|
03 | green
|
|
04 | red
|
|
05 | brown
|
|
06 | magenta
|
|
07 | orange
|
|
08 | yellow
|
|
09 | light green
|
|
10 | cyan
|
|
11 | light cyan
|
|
12 | light blue
|
|
13 | pink
|
|
14 | grey
|
|
15 | light grey
|
|
99 | default
|
|
--------------------
|
|
|
|
These other colours aren't given names:
|
|
https://modern.ircdocs.horse/formatting.html#colors-16-98
|
|
*/
|
|
package ircfmt
|