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use std::{
collections::HashMap,
fs::File,
io::Read,
pin::Pin,
rc::Rc,
sync::{Arc, Mutex},
time::Duration,
};
use anyhow::Result;
use async_trait::async_trait;
use config::Config;
use derive_builder::Builder;
use futures::task::AtomicWaker;
use tokio::time::interval;
use tokio_stream::{Stream, StreamExt, StreamMap};
use crate::{
array_to_struct,
bar::PanelDrawInfo,
common::{PanelCommon, ShowHide},
remove_string_from_config, remove_uint_from_config, Attrs, Highlight,
ManagedIntervalStream, PanelConfig, PanelRunResult, Ramp,
};
/// Shows the current battery level.
#[derive(Builder, Debug, Clone)]
#[builder_struct_attr(allow(missing_docs))]
#[builder_impl_attr(allow(missing_docs))]
#[allow(dead_code)]
pub struct Battery {
name: &'static str,
#[builder(default = r#"String::from("BAT0")"#)]
battery: String,
#[builder(default = r#"String::from("AC")"#)]
adapter: String,
#[builder(default, setter(strip_option))]
full_at: Option<u8>,
#[builder(default = "Duration::from_secs(10)")]
duration: Duration,
#[builder(default)]
waker: Arc<AtomicWaker>,
formats: BatteryFormats<String>,
attrs: Attrs,
#[builder(default, setter(strip_option))]
highlight: Option<Highlight>,
ramp: Ramp,
common: PanelCommon,
}
impl Battery {
fn draw(
&self,
cr: &Rc<cairo::Context>,
height: i32,
paused: Arc<Mutex<bool>>,
) -> Result<PanelDrawInfo> {
let mut capacity_f = File::open(format!(
"/sys/class/power_supply/{}/capacity",
self.battery
))?;
let mut capacity = String::new();
capacity_f.read_to_string(&mut capacity)?;
let capacity_val = capacity.trim().parse::<u8>()?;
let text =
if self.full_at.is_some_and(|full_at| capacity_val > full_at) {
self.formats.full.replace("%percentage%", capacity.trim())
} else {
let mut status_f = File::open(format!(
"/sys/class/power_supply/{}/status",
self.battery
))?;
let mut status = String::new();
status_f.read_to_string(&mut status)?;
match status.trim() {
"Charging" => self
.formats
.charging
.replace("%percentage%", capacity.trim()),
"Discharging" => self
.formats
.discharging
.replace("%percentage%", capacity.trim()),
"Not charging" => self
.formats
.not_charging
.replace("%percentage%", capacity.trim()),
"Full" => self
.formats
.full
.replace("%percentage%", capacity.trim()),
"Unknown" => self
.formats
.unknown
.replace("%percentage%", capacity.trim()),
_ => String::from("Unknown battery state"),
}
}
.replace(
"%ramp%",
self.ramp
.choose(capacity.trim().parse::<u32>()?, 0, 100)
.as_str(),
);
self.common.draw(
cr,
text.as_str(),
&self.attrs,
self.common.dependence,
self.highlight.clone(),
self.common.images.clone(),
height,
ShowHide::Default(paused, self.waker.clone()),
format!("{self:?}"),
)
}
}
#[async_trait(?Send)]
impl PanelConfig for Battery {
/// Parses an instance of the panel from the global [`Config`]
///
/// Configuration options:
/// - `battery`: specify which battery to monitor
/// - type: String
/// - default: "BAT0"
/// - `adapter`: specify which adapter to monitor
/// - default: "AC"
/// - currently unused
/// - `full_at`: specify the minimum percentage to use `format_full`. If
/// set, ignores the `status` file when the battery percentage is above
/// the provided value.
/// - type: u64
/// - `interval`: how often (in seconds) to poll for new values
/// - type: u64
/// - default: 10
/// - `format_charging`: format string when the battery is charging
/// - type: String
/// - formatting options: `%percentage%`
/// - default: "CHG: %percentage%%"
/// - `format_discharging`: format string when the battery is discharging
/// - type: String
/// - formatting options: `%percentage%`
/// - default: "DSCHG: %percentage%%"
/// - `format_not_charging`: format string when the battery is not charging
/// - type: String
/// - formatting options: `%percentage%`
/// - default: "NCHG: %percentage%%"
/// - `format_full`: format string when the battery is full
/// - type: String
/// - formatting options: `%percentage%`
/// - default: "FULL: %percentage%%"
/// - `format_unknown`: format string when the battery is unknown
/// - type: String
/// - formatting options: `%percentage%`
/// - default: "%percentage%%"
/// - `attrs`: A string specifying the attrs for the panel. See
/// [`Attrs::parse`] for details.
/// - `highlight`: A string specifying the highlight for the panel. See
/// [`Highlight::parse`] for details.
/// - `ramp`: A string specifying the ramp to show battery level. See
/// [`Ramp::parse`] for details.
/// - See [`PanelCommon::parse_common`].
fn parse(
name: &'static str,
table: &mut HashMap<String, config::Value>,
_global: &Config,
) -> Result<Self> {
let mut builder = BatteryBuilder::default();
builder.name(name);
if let Some(battery) = remove_string_from_config("battery", table) {
builder.battery(battery);
}
if let Some(adapter) = remove_string_from_config("adapter", table) {
builder.adapter(adapter);
}
if let Some(full_at) = remove_uint_from_config("full_at", table) {
builder.full_at(full_at.min(100) as u8);
}
if let Some(duration) = remove_uint_from_config("interval", table) {
builder.duration(Duration::from_secs(duration));
}
let formats = PanelCommon::parse_formats(
table,
&[
"_charging",
"_discharging",
"_not_charging",
"_full",
"_unknown",
],
&[
"CHG: %percentage%%",
"DSCHG: %percentage%%",
"NCHG: %percentage%%",
"FULL: %percentage%%",
"%percentage%%",
],
);
let common = PanelCommon::parse_common(table)?;
builder.formats(BatteryFormats::new(formats));
builder.attrs(PanelCommon::parse_attr(table, ""));
builder.highlight(PanelCommon::parse_highlight(table, ""));
builder.ramp(PanelCommon::parse_ramp(table, ""));
builder.common(common);
Ok(builder.build()?)
}
fn props(&self) -> (&'static str, bool) {
(self.name, self.common.visible)
}
async fn run(
mut self: Box<Self>,
cr: Rc<cairo::Context>,
global_attrs: Attrs,
height: i32,
) -> PanelRunResult {
self.attrs.apply_to(&global_attrs);
let mut map =
StreamMap::<_, Pin<Box<dyn Stream<Item = ()>>>>::with_capacity(2);
let interval = Arc::new(Mutex::new(interval(self.duration)));
let paused = Arc::new(Mutex::new(false));
let waker = Arc::new(AtomicWaker::new());
map.insert(
0,
Box::pin(
ManagedIntervalStream::new(interval, paused.clone(), waker)
.map(|_| ()),
),
);
let stream = acpid_plug::connect().await;
if let Ok(stream) = stream {
map.insert(1, Box::pin(stream.map(|_| ())));
}
Ok((
Box::pin(map.map(move |_| self.draw(&cr, height, paused.clone()))),
None,
))
}
}
array_to_struct!(
BatteryFormats,
charging,
discharging,
not_charging,
full,
unknown
);