Enum ColorSupport 

pub enum ColorSupport {
    None,
    Ansi16,
    Ansi256,
    TrueColor,
}

How many colors the terminal can show.

Variants

None

No colors at all (NO_COLOR set or TERM=dumb).

Ansi16

The 16 basic ANSI colors.

Ansi256

The xterm 256-color palette.

TrueColor

24-bit RGB.

Implementations

impl ColorSupport

pub fn detect() -> Self

Detect support from the process environment (NO_COLOR, COLORTERM, TERM).

pub fn from_env( no_color: Option<&str>, colorterm: Option<&str>, term: Option<&str>, ) -> Self

Pure detection logic behind ColorSupport::detect, for testing and for apps that read the environment themselves.

• a non-empty no_color → ColorSupport::None (https://no-color.org)
• COLORTERM of truecolor/24bit, or TERM containing direct → true color
• TERM containing 256color → 256 colors
• TERM of dumb → none; anything else → 16 colors

pub fn downgrade_color(self, color: Color) -> Color

Reduce one color to what this support level can show.

Trait Implementations

impl Clone for ColorSupport

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ColorSupport

impl Debug for ColorSupport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ColorSupport

impl Hash for ColorSupport

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ColorSupport

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for ColorSupport

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for ColorSupport

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for ColorSupport