fluffos/docs/apply/interactive/terminal_colour_replace.md

title
interactive / terminal_colour_replace

terminal_colour_replace

NAME

terminal_colour_replace - customreplace colour tokens before lookup

SYNOPSIS

string terminal_colour_replace(string token) ;

DESCRIPTION

This apply is called by the `terminal_colour()` efun to allow custom
replacement of colour tokens before they are looked up in the provided
colour mapping.

**Arguments:**
- `token`: The colour token string found between %^...%^ markers

**Return Value:**
- Return a string to use as the replacement token for mapping lookup
- Return 0 or non-string to use the original token

This apply is useful for implementing dynamic colour schemes, aliases,
or preprocessing of colour tokens. For example, you could implement
colour token inheritance or transform token names before they're
looked up in the colour mapping.

EXAMPLE

```c
string terminal_colour_replace(string token) {
    // Convert uppercase tokens to lowercase
    if (token == "RED") return "red";
    if (token == "BLUE") return "blue";

    // Allow aliases
    if (token == "danger") return "red";
    if (token == "success") return "green";

    // Return 0 to use original token
    return 0;
}
```

SEE ALSO

terminal_colour(3)

NOTE

This apply is called for each colour token found in the string passed
to `terminal_colour()`. The token string does not include the %^ markers.