WIP mem widget

src/widgets/mem.rs

@@ -1,14 +1,27 @@
+use futures::try_join;
+use heim::memory;
 use num_rational::Ratio;
 use tui::buffer::Buffer;
 use tui::layout::Rect;
-use tui::widgets::Widget;
+use tui::style::{Color, Style};
+use tui::widgets::{Axis, Chart, Dataset, Marker, Widget};
 
 use super::block;
 
+#[derive(Default)]
+struct MemData {
+	total: u64,
+	used: u64,
+	percents: Vec<(f64, f64)>,
+}
+
 pub struct MemWidget {
 	title: String,
 	pub update_interval: Ratio<u64>,
 	update_count: f64,
+
+	main: MemData,
+	swap: MemData,
 }
 
 impl MemWidget {
@@ -17,16 +30,53 @@ impl MemWidget {
 			title: " Memory Usage ".to_string(),
 			update_interval,
 			update_count: 0.0,
+
+			main: MemData::default(),
+			swap: MemData::default(),
 		}
 	}
 
 	pub async fn update(&mut self) {
 		self.update_count += 1.0;
+
+		let main = memory::memory();
+		let swap = memory::swap();
+		let (main, swap) = try_join!(main, swap).unwrap();
+
+		self.main.total = main.total().get();
+		self.main.used = self.main.total - main.available().get();
+		self.main.percents.push((
+			self.update_count,
+			self.main.used as f64 / self.main.total as f64,
+		));
+
+		self.swap.total = swap.total().get();
+		self.swap.used = swap.used().get();
+		self.swap.percents.push((
+			self.update_count,
+			self.swap.used as f64 / self.swap.total as f64,
+		));
 	}
 }
 
 impl Widget for MemWidget {
 	fn draw(&mut self, area: Rect, buf: &mut Buffer) {
-		block::new().title(&self.title).draw(area, buf);
+		Chart::<String, String>::default()
+			.block(block::new().title(&self.title))
+			.x_axis(Axis::default().bounds([self.update_count - 100.0, self.update_count + 1.0]))
+			.y_axis(Axis::default().bounds([0.0, 100.0]))
+			.datasets(&[
+				Dataset::default()
+					.name("Main")
+					.marker(Marker::Braille)
+					.style(Style::default().fg(Color::Yellow))
+					.data(&self.main.percents),
+				Dataset::default()
+					.name("Swap")
+					.marker(Marker::Braille)
+					.style(Style::default().fg(Color::Blue))
+					.data(&self.swap.percents),
+			])
+			.draw(area, buf);
 	}
 }