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use std::{cmp::min, time::Instant};
use tui::layout::Rect;
/// Calculate how many bars are to be drawn within basic mode's components.
pub fn calculate_basic_use_bars(use_percentage: f64, num_bars_available: usize) -> usize {
min(
(num_bars_available as f64 * use_percentage / 100.0).round() as usize,
num_bars_available,
)
}
/// Determine whether a graph x-label should be hidden.
pub fn should_hide_x_label(
always_hide_time: bool, autohide_time: bool, timer: &mut Option<Instant>, draw_loc: Rect,
) -> bool {
use crate::constants::*;
if always_hide_time || (autohide_time && timer.is_none()) {
true
} else if let Some(time) = timer {
if Instant::now().duration_since(*time).as_millis() < AUTOHIDE_TIMEOUT_MILLISECONDS.into() {
false
} else {
*timer = None;
true
}
} else {
draw_loc.height < TIME_LABEL_HEIGHT_LIMIT
}
}
#[cfg(test)]
mod test {
use super::*;
#[test]
fn test_calculate_basic_use_bars() {
// Testing various breakpoints and edge cases.
assert_eq!(calculate_basic_use_bars(0.0, 15), 0);
assert_eq!(calculate_basic_use_bars(1.0, 15), 0);
assert_eq!(calculate_basic_use_bars(5.0, 15), 1);
assert_eq!(calculate_basic_use_bars(10.0, 15), 2);
assert_eq!(calculate_basic_use_bars(40.0, 15), 6);
assert_eq!(calculate_basic_use_bars(45.0, 15), 7);
assert_eq!(calculate_basic_use_bars(50.0, 15), 8);
assert_eq!(calculate_basic_use_bars(100.0, 15), 15);
assert_eq!(calculate_basic_use_bars(150.0, 15), 15);
}
#[test]
fn test_should_hide_x_label() {
use std::time::{Duration, Instant};
use tui::layout::Rect;
use crate::constants::*;
let rect = Rect::new(0, 0, 10, 10);
let small_rect = Rect::new(0, 0, 10, 6);
let mut under_timer = Some(Instant::now());
let mut over_timer =
Instant::now().checked_sub(Duration::from_millis(AUTOHIDE_TIMEOUT_MILLISECONDS + 100));
assert!(should_hide_x_label(true, false, &mut None, rect));
assert!(should_hide_x_label(false, true, &mut None, rect));
assert!(should_hide_x_label(false, false, &mut None, small_rect));
assert!(!should_hide_x_label(
false,
true,
&mut under_timer,
small_rect
));
assert!(under_timer.is_some());
assert!(should_hide_x_label(
false,
true,
&mut over_timer,
small_rect
));
assert!(over_timer.is_none());
}
}
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