i3xs/src/widgets/datetime.rs

85 lines
2.1 KiB
Rust

use std::fmt::Display;
use chrono::{Local, Utc, NaiveTime, offset::TimeZone};
use i3monkit::Block;
use i3monkit::ColorRGB;
use i3monkit::{Widget, WidgetUpdate};
/// The widget that shows local time
pub struct DateTimeWidget<Tz> {
/// fmt to format the datetime, see
/// https://docs.rs/chrono/*/chrono/format/strftime/index.html for documentation.
fmt: String,
tz: Tz,
colors: Option<Vec<TimeColor>>,
}
#[derive(Clone)]
pub struct TimeColor {
pub start: NaiveTime,
pub color: ColorRGB,
}
impl DateTimeWidget<Local> {
pub fn new(fmt: String) -> Self {
DateTimeWidget::tz(fmt, Local)
}
}
impl<Tz> DateTimeWidget<Tz>
where
Tz: TimeZone,
Tz::Offset: Display,
{
pub fn tz(fmt: String, tz: Tz) -> Self {
DateTimeWidget {
fmt,
tz,
colors: None,
}
}
pub fn set_colors(&mut self, colors: &[TimeColor]) {
let mut colors = colors.to_vec();
colors.sort_by(|l, r| l.start.cmp(&r.start));
self.colors = Some(colors);
}
}
impl<Tz> Widget for DateTimeWidget<Tz>
where
Tz: TimeZone,
Tz::Offset: Display,
{
fn update(&mut self) -> Option<WidgetUpdate> {
let (time, time_string) = {
let now = Utc::now().with_timezone(&self.tz);
(now.time(), now.format(&self.fmt).to_string())
};
let color = if let Some(colors) = &self.colors {
colors
.iter()
.filter(|tc| tc.start < time)
.last()
.map(|tc| tc.color.clone())
} else {
None
};
let time_string = format!(
r#"<span size="x-large" weight="heavy">{}</span>"#,
time_string
);
let mut data = Block::new()
.append_full_text(&time_string)
.use_pango()
.clone();
if let Some(color) = color {
data.color(color);
}
Some(WidgetUpdate {
refresh_interval: std::time::Duration::from_secs(1),
data: Some(data),
})
}
}