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@ -1,32 +1,15 @@
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extern crate ansi_colours;
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use ansi_term::Colour::{Fixed, RGB};
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use ansi_term::{self, Style};
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use syntect::highlighting::{self, FontStyle};
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/// Approximate a 24 bit color value by a 8 bit ANSI code
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fn rgb2ansi(r: u8, g: u8, b: u8) -> u8 {
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const BLACK: u8 = 16;
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const WHITE: u8 = 231;
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if r == g && g == b {
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if r < 8 {
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BLACK
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} else if r > 248 {
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WHITE
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} else {
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((r - 8) as u16 * 24 / 247) as u8 + 232
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}
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} else {
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36 * (r / 51) + 6 * (g / 51) + (b / 51) + 16
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}
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}
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pub fn to_ansi_color(color: highlighting::Color, true_color: bool) -> ansi_term::Colour {
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if true_color {
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RGB(color.r, color.g, color.b)
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} else {
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let ansi_code = rgb2ansi(color.r, color.g, color.b);
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Fixed(ansi_code)
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Fixed(ansi_colours::ansi256_from_rgb((color.r, color.g, color.b)))
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}
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}
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@ -54,27 +37,3 @@ pub fn as_terminal_escaped(
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style.paint(text).to_string()
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}
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#[test]
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fn test_rgb2ansi_black_white() {
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assert_eq!(16, rgb2ansi(0x00, 0x00, 0x00));
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assert_eq!(231, rgb2ansi(0xff, 0xff, 0xff));
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}
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#[test]
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fn test_rgb2ansi_gray() {
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assert_eq!(241, rgb2ansi(0x6c, 0x6c, 0x6c));
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assert_eq!(233, rgb2ansi(0x1c, 0x1c, 0x1c));
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}
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#[test]
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fn test_rgb2ansi_color() {
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assert_eq!(96, rgb2ansi(0x87, 0x5f, 0x87));
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assert_eq!(141, rgb2ansi(0xaf, 0x87, 0xff));
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assert_eq!(193, rgb2ansi(0xd7, 0xff, 0xaf));
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}
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#[test]
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fn test_rgb2ansi_approx() {
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assert_eq!(231, rgb2ansi(0xfe, 0xfe, 0xfe));
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}
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