mirror of https://github.com/sharkdp/bat.git
83 lines
3.0 KiB
Rust
83 lines
3.0 KiB
Rust
use nu_ansi_term::Color::{self, Fixed, Rgb};
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use nu_ansi_term::{self, Style};
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use syntect::highlighting::{self, FontStyle};
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pub fn to_ansi_color(color: highlighting::Color, true_color: bool) -> Option<nu_ansi_term::Color> {
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if color.a == 0 {
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// Themes can specify one of the user-configurable terminal colors by
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// encoding them as #RRGGBBAA with AA set to 00 (transparent) and RR set
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// to the 8-bit color palette number. The built-in themes ansi, base16,
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// and base16-256 use this.
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Some(match color.r {
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// For the first 8 colors, use the Color enum to produce ANSI escape
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// sequences using codes 30-37 (foreground) and 40-47 (background).
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// For example, red foreground is \x1b[31m. This works on terminals
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// without 256-color support.
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0x00 => Color::Black,
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0x01 => Color::Red,
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0x02 => Color::Green,
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0x03 => Color::Yellow,
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0x04 => Color::Blue,
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0x05 => Color::Purple,
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0x06 => Color::Cyan,
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0x07 => Color::White,
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// For all other colors, use Fixed to produce escape sequences using
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// codes 38;5 (foreground) and 48;5 (background). For example,
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// bright red foreground is \x1b[38;5;9m. This only works on
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// terminals with 256-color support.
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//
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// TODO: When ansi_term adds support for bright variants using codes
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// 90-97 (foreground) and 100-107 (background), we should use those
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// for values 0x08 to 0x0f and only use Fixed for 0x10 to 0xff.
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n => Fixed(n),
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})
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} else if color.a == 1 {
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// Themes can specify the terminal's default foreground/background color
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// (i.e. no escape sequence) using the encoding #RRGGBBAA with AA set to
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// 01. The built-in theme ansi uses this.
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None
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} else if true_color {
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Some(Rgb(color.r, color.g, color.b))
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} else {
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Some(Fixed(ansi_colours::ansi256_from_rgb((
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color.r, color.g, color.b,
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))))
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}
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}
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pub fn as_terminal_escaped(
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style: highlighting::Style,
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text: &str,
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true_color: bool,
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colored: bool,
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italics: bool,
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background_color: Option<highlighting::Color>,
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) -> String {
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if text.is_empty() {
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return text.to_string();
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}
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let mut style = if !colored {
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Style::default()
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} else {
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let mut color = Style {
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foreground: to_ansi_color(style.foreground, true_color),
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..Style::default()
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};
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if style.font_style.contains(FontStyle::BOLD) {
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color = color.bold();
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}
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if style.font_style.contains(FontStyle::UNDERLINE) {
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color = color.underline();
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}
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if italics && style.font_style.contains(FontStyle::ITALIC) {
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color = color.italic();
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}
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color
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};
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style.background = background_color.and_then(|c| to_ansi_color(c, true_color));
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style.paint(text).to_string()
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}
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