subscriber: allow ansi sanitization to be disabled

[Lur1an]

Fix: #3369

Add ansi_sanitization flag to allow turning off the sanitization of ansi output.
Sanitizing output remains the default but can now be turned off.

Solution

ansi_sanitization is passed into the new AnsiValue struct which now replaces Escape together with a value: T, when enabled will escape values with the same logic as Escape relying on EscapingWriter.

/// A wrapper that conditionally escapes ANSI sequences when formatted.
pub(super) struct AnsiValue<T> {
    pub(super) value: T,
    pub(super) sanitize: bool,
}

impl<T> AnsiValue<T> {
    pub(super) fn new(value: T, sanitize: bool) -> Self {
        Self { value, sanitize }
    }
}

impl<T: fmt::Debug> fmt::Debug for AnsiValue<T> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        if self.sanitize {
            let mut escaping_writer = EscapingWriter { inner: f };
            write!(escaping_writer, "{:?}", self.value)
        } else {
            write!(f, "{:?}", self.value)
        }
    }
}

impl<T: fmt::Display> fmt::Display for AnsiValue<T> {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        if self.sanitize {
            let mut escaping_writer = EscapingWriter { inner: f };
            write!(escaping_writer, "{}", self.value)
        } else {
            write!(f, "{}", self.value)
        }
    }
}

[hds]

Thanks for taking in this PR! It's really appreciated!

I've got a naming question and perhaps another test needed?

[hds]

Thanks for your change!