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|
use lazy_static::lazy_static;
use std::collections::HashMap;
use tui::style::{Color, Style};
use crate::utils::{error, gen_util::*};
const GOLDEN_RATIO: f32 = 0.618_034;
// Approx, good enough for use (also Clippy gets mad if it's too long)
pub const STANDARD_FIRST_COLOUR: Color = Color::LightMagenta;
pub const STANDARD_SECOND_COLOUR: Color = Color::LightYellow;
pub const STANDARD_THIRD_COLOUR: Color = Color::LightCyan;
pub const STANDARD_FOURTH_COLOUR: Color = Color::LightGreen;
pub const AVG_COLOUR: Color = Color::Red;
lazy_static! {
static ref COLOR_NAME_LOOKUP_TABLE: HashMap<&'static str, Color> = [
("reset", Color::Reset),
("black", Color::Black),
("red", Color::Red),
("green", Color::Green),
("yellow", Color::Yellow),
("blue", Color::Blue),
("magenta", Color::Magenta),
("cyan", Color::Cyan),
("gray", Color::Gray),
("darkgray", Color::DarkGray),
("lightred", Color::LightRed),
("lightgreen", Color::LightGreen),
("lightyellow", Color::LightYellow),
("lightblue", Color::LightBlue),
("lightmagenta", Color::LightMagenta),
("lightcyan", Color::LightCyan),
("white", Color::White)
]
.iter()
.copied()
.collect();
}
/// Generates random colours. Strategy found from
/// https://martin.ankerl.com/2009/12/09/how-to-create-random-colors-programmatically/
pub fn gen_n_styles(num_to_gen: i32) -> Vec<Style> {
fn gen_hsv(h: f32) -> f32 {
let new_val = h + GOLDEN_RATIO;
if new_val > 1.0 {
new_val.fract()
} else {
new_val
}
}
/// This takes in an h, s, and v value of range [0, 1]
/// For explanation of what this does, see
/// https://en.wikipedia.org/wiki/HSL_and_HSV#HSV_to_RGB_alternative
fn hsv_to_rgb(hue: f32, saturation: f32, value: f32) -> (u8, u8, u8) {
fn hsv_helper(num: u32, hu: f32, sat: f32, val: f32) -> f32 {
let k = (num as f32 + hu * 6.0) % 6.0;
val - val * sat * float_max(float_min(k, float_min(4.1 - k, 1.1)), 0.0)
}
(
(hsv_helper(5, hue, saturation, value) * 255.0) as u8,
(hsv_helper(3, hue, saturation, value) * 255.0) as u8,
(hsv_helper(1, hue, saturation, value) * 255.0) as u8,
)
}
// Generate colours
// Why do we need so many colours? Because macOS default terminal
// throws a tantrum if you don't give it supported colours, but so
// does PowerShell with some colours (Magenta and Yellow)!
let mut colour_vec: Vec<Style> = vec![
Style::default().fg(STANDARD_FIRST_COLOUR),
Style::default().fg(STANDARD_SECOND_COLOUR),
Style::default().fg(STANDARD_THIRD_COLOUR),
Style::default().fg(STANDARD_FOURTH_COLOUR),
Style::default().fg(Color::LightBlue),
Style::default().fg(Color::LightRed),
Style::default().fg(Color::Cyan),
Style::default().fg(Color::Green),
Style::default().fg(Color::Blue),
Style::default().fg(Color::Red),
];
let mut h: f32 = 0.4; // We don't need random colours... right?
for _i in 0..(num_to_gen - 10) {
h = gen_hsv(h);
let result = hsv_to_rgb(h, 0.5, 0.95);
colour_vec.push(Style::default().fg(Color::Rgb(result.0, result.1, result.2)));
}
colour_vec
}
pub fn convert_hex_to_color(hex: &str) -> error::Result<Color> {
fn convert_hex_to_rgb(hex: &str) -> error::Result<(u8, u8, u8)> {
if hex.len() == 7 && &hex[0..1] == "#" {
let r = u8::from_str_radix(&hex[1..3], 16)?;
let g = u8::from_str_radix(&hex[3..5], 16)?;
let b = u8::from_str_radix(&hex[5..7], 16)?;
return Ok((r, g, b));
}
Err(error::BottomError::GenericError(format!(
"Colour hex {} is not of valid length. It must be a 7 character string of the form \"#112233\".",
hex
)))
}
let rgb = convert_hex_to_rgb(hex)?;
Ok(Color::Rgb(rgb.0, rgb.1, rgb.2))
}
pub fn get_style_from_config(input_val: &str) -> error::Result<Style> {
if input_val.len() > 1 {
if &input_val[0..1] == "#" {
get_style_from_hex(input_val)
} else if input_val.contains(',') {
get_style_from_rgb(input_val)
} else {
get_style_from_color_name(input_val)
}
} else {
Err(error::BottomError::GenericError(format!(
"Colour input {} is not valid.",
input_val
)))
}
}
pub fn get_colour_from_config(input_val: &str) -> error::Result<Color> {
if input_val.len() > 1 {
if &input_val[0..1] == "#" {
convert_hex_to_color(input_val)
} else if input_val.contains(',') {
convert_rgb_to_color(input_val)
} else {
convert_name_to_color(input_val)
}
} else {
Err(error::BottomError::GenericError(format!(
"Colour input {} is not valid.",
input_val
)))
}
}
pub fn get_style_from_hex(hex: &str) -> error::Result<Style> {
Ok(Style::default().fg(convert_hex_to_color(hex)?))
}
fn convert_rgb_to_color(rgb_str: &str) -> error::Result<Color> {
let rgb_list = rgb_str.split(',');
let rgb = rgb_list
.filter_map(|val| {
if let Ok(res) = val.to_string().trim().parse::<u8>() {
Some(res)
} else {
None
}
})
.collect::<Vec<_>>();
if rgb.len() == 3 {
Ok(Color::Rgb(rgb[0], rgb[1], rgb[2]))
} else {
Err(error::BottomError::GenericError(format!(
"RGB colour {} is not of valid length. It must be a comma separated value with 3 integers from 0 to 255, like \"255, 0, 155\".",
rgb_str
)))
}
}
pub fn get_style_from_rgb(rgb_str: &str) -> error::Result<Style> {
Ok(Style::default().fg(convert_rgb_to_color(rgb_str)?))
}
fn convert_name_to_color(color_name: &str) -> error::Result<Color> {
let color = COLOR_NAME_LOOKUP_TABLE.get(color_name.to_lowercase().as_str());
if let Some(color) = color {
return Ok(*color);
}
Err(error::BottomError::GenericError(format!(
"Color {} is not a supported config colour. bottom supports the following named colours as strings: \
Reset, Black, Red, Green, Yellow, Blue, Magenta, Cyan, Gray, DarkGray, LightRed, LightGreen, \
LightYellow, LightBlue, LightMagenta, LightCyan, White",
color_name
)))
}
pub fn get_style_from_color_name(color_name: &str) -> error::Result<Style> {
Ok(Style::default().fg(convert_name_to_color(color_name)?))
}
|
