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https://github.com/ratatui-org/ratatui
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docs(color): document true color support (#477)
* refactor(style): move Color to separate color mod * docs(color): document true color support
This commit is contained in:
Josh McKinney
GitHub
parent
127813120e
commit
3cf0b83bda
2 changed files with 363 additions and 338 deletions
341
src/style.rs
341
src/style.rs
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@ -26,117 +26,14 @@
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//! )
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//! )
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//! ```
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//! ```
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use std::{
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use std::fmt::{self, Debug};
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fmt::{self, Debug, Display},
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str::FromStr,
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};
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use bitflags::bitflags;
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use bitflags::bitflags;
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mod stylize;
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mod stylize;
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pub use stylize::{Styled, Stylize};
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pub use stylize::{Styled, Stylize};
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mod color;
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/// ANSI Color
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pub use color::Color;
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///
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/// All colors from the [ANSI color table](https://en.wikipedia.org/wiki/ANSI_escape_code#Colors)
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/// are supported (though some names are not exactly the same).
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///
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/// | Color Name | Color | Foreground | Background |
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/// |----------------|-------------------------|------------|------------|
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/// | `black` | [`Color::Black`] | 30 | 40 |
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/// | `red` | [`Color::Red`] | 31 | 41 |
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/// | `green` | [`Color::Green`] | 32 | 42 |
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/// | `yellow` | [`Color::Yellow`] | 33 | 43 |
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/// | `blue` | [`Color::Blue`] | 34 | 44 |
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/// | `magenta` | [`Color::Magenta`] | 35 | 45 |
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/// | `cyan` | [`Color::Cyan`] | 36 | 46 |
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/// | `gray`* | [`Color::Gray`] | 37 | 47 |
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/// | `darkgray`* | [`Color::DarkGray`] | 90 | 100 |
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/// | `lightred` | [`Color::LightRed`] | 91 | 101 |
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/// | `lightgreen` | [`Color::LightGreen`] | 92 | 102 |
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/// | `lightyellow` | [`Color::LightYellow`] | 93 | 103 |
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/// | `lightblue` | [`Color::LightBlue`] | 94 | 104 |
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/// | `lightmagenta` | [`Color::LightMagenta`] | 95 | 105 |
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/// | `lightcyan` | [`Color::LightCyan`] | 96 | 106 |
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/// | `white`* | [`Color::White`] | 97 | 107 |
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///
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/// - `gray` is sometimes called `white` - this is not supported as we use `white` for bright white
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/// - `gray` is sometimes called `silver` - this is supported
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/// - `darkgray` is sometimes called `light black` or `bright black` (both are supported)
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/// - `white` is sometimes called `light white` or `bright white` (both are supported)
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/// - we support `bright` and `light` prefixes for all colors
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/// - we support `-` and `_` and ` ` as separators for all colors
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/// - we support both `gray` and `grey` spellings
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///
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/// # Example
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///
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/// ```
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/// use ratatui::style::Color;
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/// use std::str::FromStr;
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/// assert_eq!(Color::from_str("red"), Ok(Color::Red));
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/// assert_eq!("red".parse(), Ok(Color::Red));
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/// assert_eq!("lightred".parse(), Ok(Color::LightRed));
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/// assert_eq!("light red".parse(), Ok(Color::LightRed));
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/// assert_eq!("light-red".parse(), Ok(Color::LightRed));
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/// assert_eq!("light_red".parse(), Ok(Color::LightRed));
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/// assert_eq!("lightRed".parse(), Ok(Color::LightRed));
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/// assert_eq!("bright red".parse(), Ok(Color::LightRed));
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/// assert_eq!("bright-red".parse(), Ok(Color::LightRed));
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/// assert_eq!("silver".parse(), Ok(Color::Gray));
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/// assert_eq!("dark-grey".parse(), Ok(Color::DarkGray));
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/// assert_eq!("dark gray".parse(), Ok(Color::DarkGray));
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/// assert_eq!("light-black".parse(), Ok(Color::DarkGray));
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/// assert_eq!("white".parse(), Ok(Color::White));
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/// assert_eq!("bright white".parse(), Ok(Color::White));
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/// ```
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#[derive(Debug, Default, Clone, Copy, Eq, PartialEq, Hash)]
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#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
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pub enum Color {
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/// Resets the foreground or background color
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#[default]
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Reset,
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/// ANSI Color: Black. Foreground: 30, Background: 40
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Black,
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/// ANSI Color: Red. Foreground: 31, Background: 41
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Red,
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/// ANSI Color: Green. Foreground: 32, Background: 42
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Green,
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/// ANSI Color: Yellow. Foreground: 33, Background: 43
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Yellow,
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/// ANSI Color: Blue. Foreground: 34, Background: 44
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Blue,
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/// ANSI Color: Magenta. Foreground: 35, Background: 45
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Magenta,
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/// ANSI Color: Cyan. Foreground: 36, Background: 46
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Cyan,
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/// ANSI Color: White. Foreground: 37, Background: 47
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///
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/// Note that this is sometimes called `silver` or `white` but we use `white` for bright white
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Gray,
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/// ANSI Color: Bright Black. Foreground: 90, Background: 100
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///
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/// Note that this is sometimes called `light black` or `bright black` but we use `dark gray`
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DarkGray,
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/// ANSI Color: Bright Red. Foreground: 91, Background: 101
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LightRed,
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/// ANSI Color: Bright Green. Foreground: 92, Background: 102
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LightGreen,
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/// ANSI Color: Bright Yellow. Foreground: 93, Background: 103
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LightYellow,
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/// ANSI Color: Bright Blue. Foreground: 94, Background: 104
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LightBlue,
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/// ANSI Color: Bright Magenta. Foreground: 95, Background: 105
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LightMagenta,
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/// ANSI Color: Bright Cyan. Foreground: 96, Background: 106
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LightCyan,
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/// ANSI Color: Bright White. Foreground: 97, Background: 107
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/// Sometimes called `bright white` or `light white` in some terminals
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White,
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/// An RGB color
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Rgb(u8, u8, u8),
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/// An 8-bit 256 color. See <https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit>
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Indexed(u8),
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}
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bitflags! {
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bitflags! {
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/// Modifier changes the way a piece of text is displayed.
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/// Modifier changes the way a piece of text is displayed.
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@ -422,131 +319,8 @@ impl Style {
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}
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}
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}
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}
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/// Error type indicating a failure to parse a color string.
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#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
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pub struct ParseColorError;
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impl std::fmt::Display for ParseColorError {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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write!(f, "Failed to parse Colors")
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}
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}
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impl std::error::Error for ParseColorError {}
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/// Converts a string representation to a `Color` instance.
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///
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/// The `from_str` function attempts to parse the given string and convert it to the corresponding
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/// `Color` variant. It supports named colors, RGB values, and indexed colors. If the string cannot
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/// be parsed, a `ParseColorError` is returned.
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///
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/// See the [`Color`] documentation for more information on the supported color names.
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///
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/// # Examples
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///
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/// ```
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/// # use std::str::FromStr;
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/// # use ratatui::style::Color;
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/// let color: Color = Color::from_str("blue").unwrap();
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/// assert_eq!(color, Color::Blue);
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///
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/// let color: Color = Color::from_str("#FF0000").unwrap();
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/// assert_eq!(color, Color::Rgb(255, 0, 0));
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///
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/// let color: Color = Color::from_str("10").unwrap();
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/// assert_eq!(color, Color::Indexed(10));
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///
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/// let color: Result<Color, _> = Color::from_str("invalid_color");
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/// assert!(color.is_err());
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/// ```
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impl FromStr for Color {
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type Err = ParseColorError;
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fn from_str(s: &str) -> Result<Self, Self::Err> {
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Ok(
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// There is a mix of different color names and formats in the wild.
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// This is an attempt to support as many as possible.
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match s
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.to_lowercase()
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.replace([' ', '-', '_'], "")
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.replace("bright", "light")
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.replace("grey", "gray")
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.replace("silver", "gray")
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.replace("lightblack", "darkgray")
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.replace("lightwhite", "white")
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.replace("lightgray", "white")
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.as_ref()
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{
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"reset" => Self::Reset,
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"black" => Self::Black,
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"red" => Self::Red,
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"green" => Self::Green,
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"yellow" => Self::Yellow,
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"blue" => Self::Blue,
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"magenta" => Self::Magenta,
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"cyan" => Self::Cyan,
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"gray" => Self::Gray,
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"darkgray" => Self::DarkGray,
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"lightred" => Self::LightRed,
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"lightgreen" => Self::LightGreen,
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"lightyellow" => Self::LightYellow,
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"lightblue" => Self::LightBlue,
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"lightmagenta" => Self::LightMagenta,
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"lightcyan" => Self::LightCyan,
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"white" => Self::White,
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_ => {
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if let Ok(index) = s.parse::<u8>() {
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Self::Indexed(index)
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} else if let (Ok(r), Ok(g), Ok(b)) = {
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if !s.starts_with('#') || s.len() != 7 {
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return Err(ParseColorError);
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}
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(
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u8::from_str_radix(&s[1..3], 16),
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u8::from_str_radix(&s[3..5], 16),
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u8::from_str_radix(&s[5..7], 16),
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)
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} {
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Self::Rgb(r, g, b)
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} else {
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return Err(ParseColorError);
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}
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}
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},
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)
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}
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}
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impl Display for Color {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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Color::Reset => write!(f, "Reset"),
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Color::Black => write!(f, "Black"),
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Color::Red => write!(f, "Red"),
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Color::Green => write!(f, "Green"),
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Color::Yellow => write!(f, "Yellow"),
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Color::Blue => write!(f, "Blue"),
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Color::Magenta => write!(f, "Magenta"),
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Color::Cyan => write!(f, "Cyan"),
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Color::Gray => write!(f, "Gray"),
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Color::DarkGray => write!(f, "DarkGray"),
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Color::LightRed => write!(f, "LightRed"),
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Color::LightGreen => write!(f, "LightGreen"),
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Color::LightYellow => write!(f, "LightYellow"),
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Color::LightBlue => write!(f, "LightBlue"),
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Color::LightMagenta => write!(f, "LightMagenta"),
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Color::LightCyan => write!(f, "LightCyan"),
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Color::White => write!(f, "White"),
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Color::Rgb(r, g, b) => write!(f, "#{:02X}{:02X}{:02X}", r, g, b),
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Color::Indexed(i) => write!(f, "{}", i),
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}
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}
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}
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#[cfg(test)]
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#[cfg(test)]
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mod tests {
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mod tests {
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use std::error::Error;
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use super::*;
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use super::*;
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fn styles() -> Vec<Style> {
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fn styles() -> Vec<Style> {
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);
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);
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}
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}
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#[test]
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fn from_rgb_color() {
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let color: Color = Color::from_str("#FF0000").unwrap();
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assert_eq!(color, Color::Rgb(255, 0, 0));
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}
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#[test]
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fn from_indexed_color() {
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let color: Color = Color::from_str("10").unwrap();
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assert_eq!(color, Color::Indexed(10));
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}
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#[test]
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fn from_ansi_color() -> Result<(), Box<dyn Error>> {
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assert_eq!(Color::from_str("reset")?, Color::Reset);
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assert_eq!(Color::from_str("black")?, Color::Black);
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assert_eq!(Color::from_str("red")?, Color::Red);
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assert_eq!(Color::from_str("green")?, Color::Green);
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assert_eq!(Color::from_str("yellow")?, Color::Yellow);
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assert_eq!(Color::from_str("blue")?, Color::Blue);
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assert_eq!(Color::from_str("magenta")?, Color::Magenta);
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assert_eq!(Color::from_str("cyan")?, Color::Cyan);
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assert_eq!(Color::from_str("gray")?, Color::Gray);
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assert_eq!(Color::from_str("darkgray")?, Color::DarkGray);
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assert_eq!(Color::from_str("lightred")?, Color::LightRed);
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assert_eq!(Color::from_str("lightgreen")?, Color::LightGreen);
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assert_eq!(Color::from_str("lightyellow")?, Color::LightYellow);
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assert_eq!(Color::from_str("lightblue")?, Color::LightBlue);
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assert_eq!(Color::from_str("lightmagenta")?, Color::LightMagenta);
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assert_eq!(Color::from_str("lightcyan")?, Color::LightCyan);
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assert_eq!(Color::from_str("white")?, Color::White);
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// aliases
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assert_eq!(Color::from_str("lightblack")?, Color::DarkGray);
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assert_eq!(Color::from_str("lightwhite")?, Color::White);
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assert_eq!(Color::from_str("lightgray")?, Color::White);
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// silver = grey = gray
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assert_eq!(Color::from_str("grey")?, Color::Gray);
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assert_eq!(Color::from_str("silver")?, Color::Gray);
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// spaces are ignored
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assert_eq!(Color::from_str("light black")?, Color::DarkGray);
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assert_eq!(Color::from_str("light white")?, Color::White);
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assert_eq!(Color::from_str("light gray")?, Color::White);
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// dashes are ignored
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assert_eq!(Color::from_str("light-black")?, Color::DarkGray);
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assert_eq!(Color::from_str("light-white")?, Color::White);
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assert_eq!(Color::from_str("light-gray")?, Color::White);
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// underscores are ignored
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assert_eq!(Color::from_str("light_black")?, Color::DarkGray);
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assert_eq!(Color::from_str("light_white")?, Color::White);
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assert_eq!(Color::from_str("light_gray")?, Color::White);
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// bright = light
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assert_eq!(Color::from_str("bright-black")?, Color::DarkGray);
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assert_eq!(Color::from_str("bright-white")?, Color::White);
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// bright = light
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assert_eq!(Color::from_str("brightblack")?, Color::DarkGray);
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assert_eq!(Color::from_str("brightwhite")?, Color::White);
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Ok(())
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}
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#[test]
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fn from_invalid_colors() {
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let bad_colors = [
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"invalid_color", // not a color string
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"abcdef0", // 7 chars is not a color
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" bcdefa", // doesn't start with a '#'
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"#abcdef00", // too many chars
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"resett", // typo
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"lightblackk", // typo
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];
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for bad_color in bad_colors {
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assert!(
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Color::from_str(bad_color).is_err(),
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"bad color: '{bad_color}'"
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);
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}
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}
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#[test]
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fn display() {
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assert_eq!(format!("{}", Color::Black), "Black");
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assert_eq!(format!("{}", Color::Red), "Red");
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|
||||||
assert_eq!(format!("{}", Color::Green), "Green");
|
|
||||||
assert_eq!(format!("{}", Color::Yellow), "Yellow");
|
|
||||||
assert_eq!(format!("{}", Color::Blue), "Blue");
|
|
||||||
assert_eq!(format!("{}", Color::Magenta), "Magenta");
|
|
||||||
assert_eq!(format!("{}", Color::Cyan), "Cyan");
|
|
||||||
assert_eq!(format!("{}", Color::Gray), "Gray");
|
|
||||||
assert_eq!(format!("{}", Color::DarkGray), "DarkGray");
|
|
||||||
assert_eq!(format!("{}", Color::LightRed), "LightRed");
|
|
||||||
assert_eq!(format!("{}", Color::LightGreen), "LightGreen");
|
|
||||||
assert_eq!(format!("{}", Color::LightYellow), "LightYellow");
|
|
||||||
assert_eq!(format!("{}", Color::LightBlue), "LightBlue");
|
|
||||||
assert_eq!(format!("{}", Color::LightMagenta), "LightMagenta");
|
|
||||||
assert_eq!(format!("{}", Color::LightCyan), "LightCyan");
|
|
||||||
assert_eq!(format!("{}", Color::White), "White");
|
|
||||||
assert_eq!(format!("{}", Color::Indexed(10)), "10");
|
|
||||||
assert_eq!(format!("{}", Color::Rgb(255, 0, 0)), "#FF0000");
|
|
||||||
assert_eq!(format!("{}", Color::Reset), "Reset");
|
|
||||||
}
|
|
||||||
|
|
||||||
#[test]
|
#[test]
|
||||||
fn style_can_be_const() {
|
fn style_can_be_const() {
|
||||||
const RED: Color = Color::Red;
|
const RED: Color = Color::Red;
|
||||||
|
|
|
||||||
360
src/style/color.rs
Normal file
360
src/style/color.rs
Normal file
|
|
@ -0,0 +1,360 @@
|
||||||
|
use std::{
|
||||||
|
fmt::{self, Debug, Display},
|
||||||
|
str::FromStr,
|
||||||
|
};
|
||||||
|
|
||||||
|
/// ANSI Color
|
||||||
|
///
|
||||||
|
/// All colors from the [ANSI color table] are supported (though some names are not exactly the
|
||||||
|
/// same).
|
||||||
|
///
|
||||||
|
/// | Color Name | Color | Foreground | Background |
|
||||||
|
/// |----------------|-------------------------|------------|------------|
|
||||||
|
/// | `black` | [`Color::Black`] | 30 | 40 |
|
||||||
|
/// | `red` | [`Color::Red`] | 31 | 41 |
|
||||||
|
/// | `green` | [`Color::Green`] | 32 | 42 |
|
||||||
|
/// | `yellow` | [`Color::Yellow`] | 33 | 43 |
|
||||||
|
/// | `blue` | [`Color::Blue`] | 34 | 44 |
|
||||||
|
/// | `magenta` | [`Color::Magenta`] | 35 | 45 |
|
||||||
|
/// | `cyan` | [`Color::Cyan`] | 36 | 46 |
|
||||||
|
/// | `gray`* | [`Color::Gray`] | 37 | 47 |
|
||||||
|
/// | `darkgray`* | [`Color::DarkGray`] | 90 | 100 |
|
||||||
|
/// | `lightred` | [`Color::LightRed`] | 91 | 101 |
|
||||||
|
/// | `lightgreen` | [`Color::LightGreen`] | 92 | 102 |
|
||||||
|
/// | `lightyellow` | [`Color::LightYellow`] | 93 | 103 |
|
||||||
|
/// | `lightblue` | [`Color::LightBlue`] | 94 | 104 |
|
||||||
|
/// | `lightmagenta` | [`Color::LightMagenta`] | 95 | 105 |
|
||||||
|
/// | `lightcyan` | [`Color::LightCyan`] | 96 | 106 |
|
||||||
|
/// | `white`* | [`Color::White`] | 97 | 107 |
|
||||||
|
///
|
||||||
|
/// - `gray` is sometimes called `white` - this is not supported as we use `white` for bright white
|
||||||
|
/// - `gray` is sometimes called `silver` - this is supported
|
||||||
|
/// - `darkgray` is sometimes called `light black` or `bright black` (both are supported)
|
||||||
|
/// - `white` is sometimes called `light white` or `bright white` (both are supported)
|
||||||
|
/// - we support `bright` and `light` prefixes for all colors
|
||||||
|
/// - we support `-` and `_` and ` ` as separators for all colors
|
||||||
|
/// - we support both `gray` and `grey` spellings
|
||||||
|
///
|
||||||
|
/// # Example
|
||||||
|
///
|
||||||
|
/// ```
|
||||||
|
/// use ratatui::style::Color;
|
||||||
|
/// use std::str::FromStr;
|
||||||
|
/// assert_eq!(Color::from_str("red"), Ok(Color::Red));
|
||||||
|
/// assert_eq!("red".parse(), Ok(Color::Red));
|
||||||
|
/// assert_eq!("lightred".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("light red".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("light-red".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("light_red".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("lightRed".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("bright red".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("bright-red".parse(), Ok(Color::LightRed));
|
||||||
|
/// assert_eq!("silver".parse(), Ok(Color::Gray));
|
||||||
|
/// assert_eq!("dark-grey".parse(), Ok(Color::DarkGray));
|
||||||
|
/// assert_eq!("dark gray".parse(), Ok(Color::DarkGray));
|
||||||
|
/// assert_eq!("light-black".parse(), Ok(Color::DarkGray));
|
||||||
|
/// assert_eq!("white".parse(), Ok(Color::White));
|
||||||
|
/// assert_eq!("bright white".parse(), Ok(Color::White));
|
||||||
|
/// ```
|
||||||
|
///
|
||||||
|
/// [ANSI color table]: https://en.wikipedia.org/wiki/ANSI_escape_code#Colors
|
||||||
|
#[derive(Debug, Default, Clone, Copy, Eq, PartialEq, Hash)]
|
||||||
|
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
|
||||||
|
pub enum Color {
|
||||||
|
/// Resets the foreground or background color
|
||||||
|
#[default]
|
||||||
|
Reset,
|
||||||
|
/// ANSI Color: Black. Foreground: 30, Background: 40
|
||||||
|
Black,
|
||||||
|
/// ANSI Color: Red. Foreground: 31, Background: 41
|
||||||
|
Red,
|
||||||
|
/// ANSI Color: Green. Foreground: 32, Background: 42
|
||||||
|
Green,
|
||||||
|
/// ANSI Color: Yellow. Foreground: 33, Background: 43
|
||||||
|
Yellow,
|
||||||
|
/// ANSI Color: Blue. Foreground: 34, Background: 44
|
||||||
|
Blue,
|
||||||
|
/// ANSI Color: Magenta. Foreground: 35, Background: 45
|
||||||
|
Magenta,
|
||||||
|
/// ANSI Color: Cyan. Foreground: 36, Background: 46
|
||||||
|
Cyan,
|
||||||
|
/// ANSI Color: White. Foreground: 37, Background: 47
|
||||||
|
///
|
||||||
|
/// Note that this is sometimes called `silver` or `white` but we use `white` for bright white
|
||||||
|
Gray,
|
||||||
|
/// ANSI Color: Bright Black. Foreground: 90, Background: 100
|
||||||
|
///
|
||||||
|
/// Note that this is sometimes called `light black` or `bright black` but we use `dark gray`
|
||||||
|
DarkGray,
|
||||||
|
/// ANSI Color: Bright Red. Foreground: 91, Background: 101
|
||||||
|
LightRed,
|
||||||
|
/// ANSI Color: Bright Green. Foreground: 92, Background: 102
|
||||||
|
LightGreen,
|
||||||
|
/// ANSI Color: Bright Yellow. Foreground: 93, Background: 103
|
||||||
|
LightYellow,
|
||||||
|
/// ANSI Color: Bright Blue. Foreground: 94, Background: 104
|
||||||
|
LightBlue,
|
||||||
|
/// ANSI Color: Bright Magenta. Foreground: 95, Background: 105
|
||||||
|
LightMagenta,
|
||||||
|
/// ANSI Color: Bright Cyan. Foreground: 96, Background: 106
|
||||||
|
LightCyan,
|
||||||
|
/// ANSI Color: Bright White. Foreground: 97, Background: 107
|
||||||
|
/// Sometimes called `bright white` or `light white` in some terminals
|
||||||
|
White,
|
||||||
|
/// An RGB color.
|
||||||
|
///
|
||||||
|
/// Note that only terminals that support 24-bit true color will display this correctly.
|
||||||
|
/// Notably versions of Windows Terminal prior to Windows 10 and macOS Terminal.app do not
|
||||||
|
/// support this.
|
||||||
|
///
|
||||||
|
/// If the terminal does not support true color, code using the [`TermwizBackend`] will
|
||||||
|
/// fallback to the default text color. Crossterm and Termion do not have this capability and
|
||||||
|
/// the display will be unpredictable (e.g. Terminal.app may display glitched blinking text).
|
||||||
|
/// See <https://github.com/ratatui-org/ratatui/issues/475> for an example of this problem.
|
||||||
|
///
|
||||||
|
/// See also: <https://en.wikipedia.org/wiki/ANSI_escape_code#24-bit>
|
||||||
|
///
|
||||||
|
/// [`TermwizBackend`]: crate::backend::TermwizBackend
|
||||||
|
Rgb(u8, u8, u8),
|
||||||
|
/// An 8-bit 256 color.
|
||||||
|
///
|
||||||
|
/// See also <https://en.wikipedia.org/wiki/ANSI_escape_code#8-bit>
|
||||||
|
Indexed(u8),
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Error type indicating a failure to parse a color string.
|
||||||
|
#[derive(Debug, Clone, Copy, Eq, PartialEq, Hash)]
|
||||||
|
pub struct ParseColorError;
|
||||||
|
|
||||||
|
impl std::fmt::Display for ParseColorError {
|
||||||
|
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
|
||||||
|
write!(f, "Failed to parse Colors")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl std::error::Error for ParseColorError {}
|
||||||
|
|
||||||
|
/// Converts a string representation to a `Color` instance.
|
||||||
|
///
|
||||||
|
/// The `from_str` function attempts to parse the given string and convert it to the corresponding
|
||||||
|
/// `Color` variant. It supports named colors, RGB values, and indexed colors. If the string cannot
|
||||||
|
/// be parsed, a `ParseColorError` is returned.
|
||||||
|
///
|
||||||
|
/// See the [`Color`] documentation for more information on the supported color names.
|
||||||
|
///
|
||||||
|
/// # Examples
|
||||||
|
///
|
||||||
|
/// ```
|
||||||
|
/// # use std::str::FromStr;
|
||||||
|
/// # use ratatui::style::Color;
|
||||||
|
/// let color: Color = Color::from_str("blue").unwrap();
|
||||||
|
/// assert_eq!(color, Color::Blue);
|
||||||
|
///
|
||||||
|
/// let color: Color = Color::from_str("#FF0000").unwrap();
|
||||||
|
/// assert_eq!(color, Color::Rgb(255, 0, 0));
|
||||||
|
///
|
||||||
|
/// let color: Color = Color::from_str("10").unwrap();
|
||||||
|
/// assert_eq!(color, Color::Indexed(10));
|
||||||
|
///
|
||||||
|
/// let color: Result<Color, _> = Color::from_str("invalid_color");
|
||||||
|
/// assert!(color.is_err());
|
||||||
|
/// ```
|
||||||
|
impl FromStr for Color {
|
||||||
|
type Err = ParseColorError;
|
||||||
|
|
||||||
|
fn from_str(s: &str) -> Result<Self, Self::Err> {
|
||||||
|
Ok(
|
||||||
|
// There is a mix of different color names and formats in the wild.
|
||||||
|
// This is an attempt to support as many as possible.
|
||||||
|
match s
|
||||||
|
.to_lowercase()
|
||||||
|
.replace([' ', '-', '_'], "")
|
||||||
|
.replace("bright", "light")
|
||||||
|
.replace("grey", "gray")
|
||||||
|
.replace("silver", "gray")
|
||||||
|
.replace("lightblack", "darkgray")
|
||||||
|
.replace("lightwhite", "white")
|
||||||
|
.replace("lightgray", "white")
|
||||||
|
.as_ref()
|
||||||
|
{
|
||||||
|
"reset" => Self::Reset,
|
||||||
|
"black" => Self::Black,
|
||||||
|
"red" => Self::Red,
|
||||||
|
"green" => Self::Green,
|
||||||
|
"yellow" => Self::Yellow,
|
||||||
|
"blue" => Self::Blue,
|
||||||
|
"magenta" => Self::Magenta,
|
||||||
|
"cyan" => Self::Cyan,
|
||||||
|
"gray" => Self::Gray,
|
||||||
|
"darkgray" => Self::DarkGray,
|
||||||
|
"lightred" => Self::LightRed,
|
||||||
|
"lightgreen" => Self::LightGreen,
|
||||||
|
"lightyellow" => Self::LightYellow,
|
||||||
|
"lightblue" => Self::LightBlue,
|
||||||
|
"lightmagenta" => Self::LightMagenta,
|
||||||
|
"lightcyan" => Self::LightCyan,
|
||||||
|
"white" => Self::White,
|
||||||
|
_ => {
|
||||||
|
if let Ok(index) = s.parse::<u8>() {
|
||||||
|
Self::Indexed(index)
|
||||||
|
} else if let (Ok(r), Ok(g), Ok(b)) = {
|
||||||
|
if !s.starts_with('#') || s.len() != 7 {
|
||||||
|
return Err(ParseColorError);
|
||||||
|
}
|
||||||
|
(
|
||||||
|
u8::from_str_radix(&s[1..3], 16),
|
||||||
|
u8::from_str_radix(&s[3..5], 16),
|
||||||
|
u8::from_str_radix(&s[5..7], 16),
|
||||||
|
)
|
||||||
|
} {
|
||||||
|
Self::Rgb(r, g, b)
|
||||||
|
} else {
|
||||||
|
return Err(ParseColorError);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
},
|
||||||
|
)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Display for Color {
|
||||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||||
|
match self {
|
||||||
|
Color::Reset => write!(f, "Reset"),
|
||||||
|
Color::Black => write!(f, "Black"),
|
||||||
|
Color::Red => write!(f, "Red"),
|
||||||
|
Color::Green => write!(f, "Green"),
|
||||||
|
Color::Yellow => write!(f, "Yellow"),
|
||||||
|
Color::Blue => write!(f, "Blue"),
|
||||||
|
Color::Magenta => write!(f, "Magenta"),
|
||||||
|
Color::Cyan => write!(f, "Cyan"),
|
||||||
|
Color::Gray => write!(f, "Gray"),
|
||||||
|
Color::DarkGray => write!(f, "DarkGray"),
|
||||||
|
Color::LightRed => write!(f, "LightRed"),
|
||||||
|
Color::LightGreen => write!(f, "LightGreen"),
|
||||||
|
Color::LightYellow => write!(f, "LightYellow"),
|
||||||
|
Color::LightBlue => write!(f, "LightBlue"),
|
||||||
|
Color::LightMagenta => write!(f, "LightMagenta"),
|
||||||
|
Color::LightCyan => write!(f, "LightCyan"),
|
||||||
|
Color::White => write!(f, "White"),
|
||||||
|
Color::Rgb(r, g, b) => write!(f, "#{:02X}{:02X}{:02X}", r, g, b),
|
||||||
|
Color::Indexed(i) => write!(f, "{}", i),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use std::error::Error;
|
||||||
|
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn from_rgb_color() {
|
||||||
|
let color: Color = Color::from_str("#FF0000").unwrap();
|
||||||
|
assert_eq!(color, Color::Rgb(255, 0, 0));
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn from_indexed_color() {
|
||||||
|
let color: Color = Color::from_str("10").unwrap();
|
||||||
|
assert_eq!(color, Color::Indexed(10));
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn from_ansi_color() -> Result<(), Box<dyn Error>> {
|
||||||
|
assert_eq!(Color::from_str("reset")?, Color::Reset);
|
||||||
|
assert_eq!(Color::from_str("black")?, Color::Black);
|
||||||
|
assert_eq!(Color::from_str("red")?, Color::Red);
|
||||||
|
assert_eq!(Color::from_str("green")?, Color::Green);
|
||||||
|
assert_eq!(Color::from_str("yellow")?, Color::Yellow);
|
||||||
|
assert_eq!(Color::from_str("blue")?, Color::Blue);
|
||||||
|
assert_eq!(Color::from_str("magenta")?, Color::Magenta);
|
||||||
|
assert_eq!(Color::from_str("cyan")?, Color::Cyan);
|
||||||
|
assert_eq!(Color::from_str("gray")?, Color::Gray);
|
||||||
|
assert_eq!(Color::from_str("darkgray")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("lightred")?, Color::LightRed);
|
||||||
|
assert_eq!(Color::from_str("lightgreen")?, Color::LightGreen);
|
||||||
|
assert_eq!(Color::from_str("lightyellow")?, Color::LightYellow);
|
||||||
|
assert_eq!(Color::from_str("lightblue")?, Color::LightBlue);
|
||||||
|
assert_eq!(Color::from_str("lightmagenta")?, Color::LightMagenta);
|
||||||
|
assert_eq!(Color::from_str("lightcyan")?, Color::LightCyan);
|
||||||
|
assert_eq!(Color::from_str("white")?, Color::White);
|
||||||
|
|
||||||
|
// aliases
|
||||||
|
assert_eq!(Color::from_str("lightblack")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("lightwhite")?, Color::White);
|
||||||
|
assert_eq!(Color::from_str("lightgray")?, Color::White);
|
||||||
|
|
||||||
|
// silver = grey = gray
|
||||||
|
assert_eq!(Color::from_str("grey")?, Color::Gray);
|
||||||
|
assert_eq!(Color::from_str("silver")?, Color::Gray);
|
||||||
|
|
||||||
|
// spaces are ignored
|
||||||
|
assert_eq!(Color::from_str("light black")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("light white")?, Color::White);
|
||||||
|
assert_eq!(Color::from_str("light gray")?, Color::White);
|
||||||
|
|
||||||
|
// dashes are ignored
|
||||||
|
assert_eq!(Color::from_str("light-black")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("light-white")?, Color::White);
|
||||||
|
assert_eq!(Color::from_str("light-gray")?, Color::White);
|
||||||
|
|
||||||
|
// underscores are ignored
|
||||||
|
assert_eq!(Color::from_str("light_black")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("light_white")?, Color::White);
|
||||||
|
assert_eq!(Color::from_str("light_gray")?, Color::White);
|
||||||
|
|
||||||
|
// bright = light
|
||||||
|
assert_eq!(Color::from_str("bright-black")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("bright-white")?, Color::White);
|
||||||
|
|
||||||
|
// bright = light
|
||||||
|
assert_eq!(Color::from_str("brightblack")?, Color::DarkGray);
|
||||||
|
assert_eq!(Color::from_str("brightwhite")?, Color::White);
|
||||||
|
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn from_invalid_colors() {
|
||||||
|
let bad_colors = [
|
||||||
|
"invalid_color", // not a color string
|
||||||
|
"abcdef0", // 7 chars is not a color
|
||||||
|
" bcdefa", // doesn't start with a '#'
|
||||||
|
"#abcdef00", // too many chars
|
||||||
|
"resett", // typo
|
||||||
|
"lightblackk", // typo
|
||||||
|
];
|
||||||
|
|
||||||
|
for bad_color in bad_colors {
|
||||||
|
assert!(
|
||||||
|
Color::from_str(bad_color).is_err(),
|
||||||
|
"bad color: '{bad_color}'"
|
||||||
|
);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn display() {
|
||||||
|
assert_eq!(format!("{}", Color::Black), "Black");
|
||||||
|
assert_eq!(format!("{}", Color::Red), "Red");
|
||||||
|
assert_eq!(format!("{}", Color::Green), "Green");
|
||||||
|
assert_eq!(format!("{}", Color::Yellow), "Yellow");
|
||||||
|
assert_eq!(format!("{}", Color::Blue), "Blue");
|
||||||
|
assert_eq!(format!("{}", Color::Magenta), "Magenta");
|
||||||
|
assert_eq!(format!("{}", Color::Cyan), "Cyan");
|
||||||
|
assert_eq!(format!("{}", Color::Gray), "Gray");
|
||||||
|
assert_eq!(format!("{}", Color::DarkGray), "DarkGray");
|
||||||
|
assert_eq!(format!("{}", Color::LightRed), "LightRed");
|
||||||
|
assert_eq!(format!("{}", Color::LightGreen), "LightGreen");
|
||||||
|
assert_eq!(format!("{}", Color::LightYellow), "LightYellow");
|
||||||
|
assert_eq!(format!("{}", Color::LightBlue), "LightBlue");
|
||||||
|
assert_eq!(format!("{}", Color::LightMagenta), "LightMagenta");
|
||||||
|
assert_eq!(format!("{}", Color::LightCyan), "LightCyan");
|
||||||
|
assert_eq!(format!("{}", Color::White), "White");
|
||||||
|
assert_eq!(format!("{}", Color::Indexed(10)), "10");
|
||||||
|
assert_eq!(format!("{}", Color::Rgb(255, 0, 0)), "#FF0000");
|
||||||
|
assert_eq!(format!("{}", Color::Reset), "Reset");
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue