barust 0.3.0

A X11 status bar
Documentation 
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use crate::{
    utils::bytes_to_closest,
    widget_default,
    widgets::{Rectangle, Result},
};
use async_trait::async_trait;
use cairo::Context;
use log::debug;
use psutil::memory::virtual_memory;
use std::fmt::Display;

use super::{Text, Widget, WidgetConfig};

/// Displays memory informations
#[derive(Debug)]
pub struct Memory {
    format: String,
    inner: Text,
}

impl Memory {
    ///* `format`
    ///  * *%p* will be replaced with the usage percentage
    ///  * *%t* will be replaced with the total ram
    ///  * *%a* will be replaced with the available ram
    ///  * *%u* will be replaced with the used ram
    ///  * *%f* will be replaced with the free ram
    ///* `config` a [&WidgetConfig]
    pub async fn new(format: impl ToString, config: &WidgetConfig) -> Box<Self> {
        Box::new(Self {
            format: format.to_string(),
            inner: *Text::new("", config).await,
        })
    }
}

#[async_trait]
impl Widget for Memory {
    async fn update(&mut self) -> Result<()> {
        debug!("updating memory");
        let ram = virtual_memory().map_err(Error::from)?;
        let text = self
            .format
            .replace("%p", &format!("{:.2}", ram.percent()))
            .replace("%t", &bytes_to_closest(ram.total()))
            .replace("%a", &bytes_to_closest(ram.available()))
            .replace("%u", &bytes_to_closest(ram.used()))
            .replace("%f", &bytes_to_closest(ram.free()));
        self.inner.set_text(text);
        Ok(())
    }

    widget_default!(draw, size, padding);
}

impl Display for Memory {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        String::from("Memory").fmt(f)
    }
}

#[derive(thiserror::Error, Debug)]
#[error(transparent)]
pub enum Error {
    Cairo(#[from] cairo::Error),
    Psutil(#[from] psutil::Error),
}