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nushell/crates/nu-ansi-term/src/style.rs
ahkrr 74b812228c
upgrade dependencies (#4116) 
* remove unused dependencies

* upgrade dependency bytes 0.5.6 -> 1.1.0

* upgrade dependency heapless 0.6.1 -> 0.7.8

* upgrade dependency image 0.22.4 -> 0.23.14

* upgrade dependency mp4 0.8.2 -> 0.9.0

* upgrade dependency bson 0.14.1 -> 2.0.1

Bson::Undefined, Bson::MaxKey, Bson::MinKey and Bson::DbPointer
weren't present in the previous version.

Co-authored-by: ahkrr <alexhk@protonmail.com>
2021-11-14 19:32:21 +13:00

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/// A style is a collection of properties that can format a string
/// using ANSI escape codes.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::{Style, Color};
///
/// let style = Style::new().bold().on(Color::Black);
/// println!("{}", style.paint("Bold on black"));
/// ```
#[derive(PartialEq, Clone, Copy)]
#[cfg_attr(
feature = "derive_serde_style",
derive(serde::Deserialize, serde::Serialize)
)]
pub struct Style {
/// The style's foreground color, if it has one.
pub foreground: Option<Color>,
/// The style's background color, if it has one.
pub background: Option<Color>,
/// Whether this style is bold.
pub is_bold: bool,
/// Whether this style is dimmed.
pub is_dimmed: bool,
/// Whether this style is italic.
pub is_italic: bool,
/// Whether this style is underlined.
pub is_underline: bool,
/// Whether this style is blinking.
pub is_blink: bool,
/// Whether this style has reverse colors.
pub is_reverse: bool,
/// Whether this style is hidden.
pub is_hidden: bool,
/// Whether this style is struckthrough.
pub is_strikethrough: bool,
}
impl Style {
/// Creates a new Style with no properties set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new();
/// println!("{}", style.paint("hi"));
/// ```
pub fn new() -> Style {
Style::default()
}
/// Returns a `Style` with the bold property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().bold();
/// println!("{}", style.paint("hey"));
/// ```
pub fn bold(&self) -> Style {
Style {
is_bold: true,
..*self
}
}
/// Returns a `Style` with the dimmed property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().dimmed();
/// println!("{}", style.paint("sup"));
/// ```
pub fn dimmed(&self) -> Style {
Style {
is_dimmed: true,
..*self
}
}
/// Returns a `Style` with the italic property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().italic();
/// println!("{}", style.paint("greetings"));
/// ```
pub fn italic(&self) -> Style {
Style {
is_italic: true,
..*self
}
}
/// Returns a `Style` with the underline property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().underline();
/// println!("{}", style.paint("salutations"));
/// ```
pub fn underline(&self) -> Style {
Style {
is_underline: true,
..*self
}
}
/// Returns a `Style` with the blink property set.
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().blink();
/// println!("{}", style.paint("wazzup"));
/// ```
pub fn blink(&self) -> Style {
Style {
is_blink: true,
..*self
}
}
/// Returns a `Style` with the reverse property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().reverse();
/// println!("{}", style.paint("aloha"));
/// ```
pub fn reverse(&self) -> Style {
Style {
is_reverse: true,
..*self
}
}
/// Returns a `Style` with the hidden property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().hidden();
/// println!("{}", style.paint("ahoy"));
/// ```
pub fn hidden(&self) -> Style {
Style {
is_hidden: true,
..*self
}
}
/// Returns a `Style` with the strikethrough property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// let style = Style::new().strikethrough();
/// println!("{}", style.paint("yo"));
/// ```
pub fn strikethrough(&self) -> Style {
Style {
is_strikethrough: true,
..*self
}
}
/// Returns a `Style` with the foreground color property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::{Style, Color};
///
/// let style = Style::new().fg(Color::Yellow);
/// println!("{}", style.paint("hi"));
/// ```
pub fn fg(&self, foreground: Color) -> Style {
Style {
foreground: Some(foreground),
..*self
}
}
/// Returns a `Style` with the background color property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::{Style, Color};
///
/// let style = Style::new().on(Color::Blue);
/// println!("{}", style.paint("eyyyy"));
/// ```
pub fn on(&self, background: Color) -> Style {
Style {
background: Some(background),
..*self
}
}
/// Return true if this `Style` has no actual styles, and can be written
/// without any control characters.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Style;
///
/// assert_eq!(true, Style::default().is_plain());
/// assert_eq!(false, Style::default().bold().is_plain());
/// ```
pub fn is_plain(self) -> bool {
self == Style::default()
}
}
impl Default for Style {
/// Returns a style with *no* properties set. Formatting text using this
/// style returns the exact same text.
///
/// ```
/// use nu_ansi_term::Style;
/// assert_eq!(None, Style::default().foreground);
/// assert_eq!(None, Style::default().background);
/// assert_eq!(false, Style::default().is_bold);
/// assert_eq!("txt", Style::default().paint("txt").to_string());
/// ```
fn default() -> Style {
Style {
foreground: None,
background: None,
is_bold: false,
is_dimmed: false,
is_italic: false,
is_underline: false,
is_blink: false,
is_reverse: false,
is_hidden: false,
is_strikethrough: false,
}
}
}
// ---- colors ----
/// A color is one specific type of ANSI escape code, and can refer
/// to either the foreground or background color.
///
/// These use the standard numeric sequences.
/// See <http://invisible-island.net/xterm/ctlseqs/ctlseqs.html>
#[derive(PartialEq, Clone, Copy, Debug)]
#[cfg_attr(
feature = "derive_serde_style",
derive(serde::Deserialize, serde::Serialize)
)]
pub enum Color {
/// Color #0 (foreground code `30`, background code `40`).
///
/// This is not necessarily the background color, and using it as one may
/// render the text hard to read on terminals with dark backgrounds.
Black,
/// Color #0 (foreground code `90`, background code `100`).
DarkGray,
/// Color #1 (foreground code `31`, background code `41`).
Red,
/// Color #1 (foreground code `91`, background code `101`).
LightRed,
/// Color #2 (foreground code `32`, background code `42`).
Green,
/// Color #2 (foreground code `92`, background code `102`).
LightGreen,
/// Color #3 (foreground code `33`, background code `43`).
Yellow,
/// Color #3 (foreground code `93`, background code `103`).
LightYellow,
/// Color #4 (foreground code `34`, background code `44`).
Blue,
/// Color #4 (foreground code `94`, background code `104`).
LightBlue,
/// Color #5 (foreground code `35`, background code `45`).
Purple,
/// Color #5 (foreground code `95`, background code `105`).
LightPurple,
/// Color #5 (foreground code `35`, background code `45`).
Magenta,
/// Color #5 (foreground code `95`, background code `105`).
LightMagenta,
/// Color #6 (foreground code `36`, background code `46`).
Cyan,
/// Color #6 (foreground code `96`, background code `106`).
LightCyan,
/// Color #7 (foreground code `37`, background code `47`).
///
/// As above, this is not necessarily the foreground color, and may be
/// hard to read on terminals with light backgrounds.
White,
/// Color #7 (foreground code `97`, background code `107`).
LightGray,
/// A color number from 0 to 255, for use in 256-color terminal
/// environments.
///
/// - colors 0 to 7 are the `Black` to `White` variants respectively.
/// These colors can usually be changed in the terminal emulator.
/// - colors 8 to 15 are brighter versions of the eight colors above.
/// These can also usually be changed in the terminal emulator, or it
/// could be configured to use the original colors and show the text in
/// bold instead. It varies depending on the program.
/// - colors 16 to 231 contain several palettes of bright colors,
/// arranged in six squares measuring six by six each.
/// - colors 232 to 255 are shades of grey from black to white.
///
/// It might make more sense to look at a [color chart][cc].
///
/// [cc]: https://upload.wikimedia.org/wikipedia/commons/1/15/Xterm_256color_chart.svg
Fixed(u8),
/// A 24-bit Rgb color, as specified by ISO-8613-3.
Rgb(u8, u8, u8),
}
impl Default for Color {
fn default() -> Self {
Color::White
}
}
impl Color {
/// Returns a `Style` with the foreground color set to this color.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Red.normal();
/// println!("{}", style.paint("hi"));
/// ```
pub fn normal(self) -> Style {
Style {
foreground: Some(self),
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// bold property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Green.bold();
/// println!("{}", style.paint("hey"));
/// ```
pub fn bold(self) -> Style {
Style {
foreground: Some(self),
is_bold: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// dimmed property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Yellow.dimmed();
/// println!("{}", style.paint("sup"));
/// ```
pub fn dimmed(self) -> Style {
Style {
foreground: Some(self),
is_dimmed: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// italic property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Blue.italic();
/// println!("{}", style.paint("greetings"));
/// ```
pub fn italic(self) -> Style {
Style {
foreground: Some(self),
is_italic: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// underline property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Purple.underline();
/// println!("{}", style.paint("salutations"));
/// ```
pub fn underline(self) -> Style {
Style {
foreground: Some(self),
is_underline: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// blink property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Cyan.blink();
/// println!("{}", style.paint("wazzup"));
/// ```
pub fn blink(self) -> Style {
Style {
foreground: Some(self),
is_blink: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// reverse property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Black.reverse();
/// println!("{}", style.paint("aloha"));
/// ```
pub fn reverse(self) -> Style {
Style {
foreground: Some(self),
is_reverse: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// hidden property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::White.hidden();
/// println!("{}", style.paint("ahoy"));
/// ```
pub fn hidden(self) -> Style {
Style {
foreground: Some(self),
is_hidden: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// strikethrough property set.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Fixed(244).strikethrough();
/// println!("{}", style.paint("yo"));
/// ```
pub fn strikethrough(self) -> Style {
Style {
foreground: Some(self),
is_strikethrough: true,
..Style::default()
}
}
/// Returns a `Style` with the foreground color set to this color and the
/// background color property set to the given color.
///
/// # Examples
///
/// ```
/// use nu_ansi_term::Color;
///
/// let style = Color::Rgb(31, 31, 31).on(Color::White);
/// println!("{}", style.paint("eyyyy"));
/// ```
pub fn on(self, background: Color) -> Style {
Style {
foreground: Some(self),
background: Some(background),
..Style::default()
}
}
}
impl From<Color> for Style {
/// You can turn a `Color` into a `Style` with the foreground color set
/// with the `From` trait.
///
/// ```
/// use nu_ansi_term::{Style, Color};
/// let green_foreground = Style::default().fg(Color::Green);
/// assert_eq!(green_foreground, Color::Green.normal());
/// assert_eq!(green_foreground, Color::Green.into());
/// assert_eq!(green_foreground, Style::from(Color::Green));
/// ```
fn from(color: Color) -> Style {
color.normal()
}
}
#[cfg(test)]
#[cfg(feature = "derive_serde_style")]
mod serde_json_tests {
use super::{Color, Style};
#[test]
fn color_serialization() {
let colors = &[
Color::Red,
Color::Blue,
Color::Rgb(123, 123, 123),
Color::Fixed(255),
];
assert_eq!(
serde_json::to_string(&colors).unwrap(),
String::from("[\"Red\",\"Blue\",{\"Rgb\":[123,123,123]},{\"Fixed\":255}]")
);
}
#[test]
fn color_deserialization() {
let colors = [
Color::Red,
Color::Blue,
Color::Rgb(123, 123, 123),
Color::Fixed(255),
];
for color in colors {
let serialized = serde_json::to_string(&color).unwrap();
let deserialized: Color = serde_json::from_str(&serialized).unwrap();
assert_eq!(color, deserialized);
}
}
#[test]
fn style_serialization() {
let style = Style::default();
assert_eq!(serde_json::to_string(&style).unwrap(), "{\"foreground\":null,\"background\":null,\"is_bold\":false,\"is_dimmed\":false,\"is_italic\":false,\"is_underline\":false,\"is_blink\":false,\"is_reverse\":false,\"is_hidden\":false,\"is_strikethrough\":false}".to_string());
}
}
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