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lib.rs
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lib.rs
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//! This is a pretty direct port of the [sparkline demo in the tui crate][demo].
//!
//! [demo]: https://github.com/fdehau/tui-rs/blob/3f62ce9c199bb0048996bbdeb236d6e5522ec9e0/examples/sparkline.rs
use console_error_panic_hook::set_once as set_panic_hook;
use crossterm::{execute, terminal::EnterAlternateScreen};
use rand::{
distributions::{Distribution, Uniform},
rngs::StdRng,
SeedableRng,
};
use tui::{
backend::CrosstermBackend,
layout::{Constraint, Direction, Layout},
style::{Color, Style},
widgets::{Block, Borders, Sparkline},
Terminal as TuiTerminal,
};
use wasm_bindgen::prelude::*;
use web_sys::Crypto;
use xterm_js_sys::{
crossterm_support::XtermJsCrosstermBackend,
xterm::{LogLevel, Terminal, TerminalOptions, Theme},
};
use std::io::Write;
#[path = "../../common.rs"]
mod common;
use common::{log, AnimationFrameCallbackWrapper};
#[wasm_bindgen]
pub fn alt_run() -> Result<Option<AnimationFrameCallbackWrapper>, JsValue> {
set_panic_hook();
let window = web_sys::window().expect("no global `window` exists");
let document = window.document().expect("should have a document on window");
let terminal_div = document
.get_element_by_id("terminal")
.expect("should have a terminal div");
let term = Terminal::new(Some(
TerminalOptions::default()
.with_log_level(LogLevel::Debug)
.with_theme(Theme::nord())
.with_font_family("'Fira Mono', monospace")
.with_font_size(11.0),
));
term.open(terminal_div);
let a = AnimationFrameCallbackWrapper::new().leak();
let mut b = 0;
a.safe_start(move || {
log!("heyo! {}", b);
b += 1;
if b % 10 == 0 {
term.write(format!("ayo: {}\r\n", b));
}
if b % 600 == 0 {
term.reset()
}
b != 3600
});
let b = AnimationFrameCallbackWrapper::new().leak();
b.safe_start(move || {
log!("yak!");
true
});
Ok(None)
}
#[derive(Clone)]
pub struct RandomSignal {
distribution: Uniform<u64>,
rng: StdRng,
}
impl RandomSignal {
pub fn new(crypto: Crypto, lower: u64, upper: u64) -> RandomSignal {
let mut seed = [0u8; 32];
crypto.get_random_values_with_u8_array(&mut seed).unwrap();
RandomSignal {
distribution: Uniform::new(lower, upper),
rng: StdRng::from_seed(seed),
}
}
}
impl Iterator for RandomSignal {
type Item = u64;
fn next(&mut self) -> Option<u64> {
Some(self.distribution.sample(&mut self.rng))
}
}
struct App {
signal: RandomSignal,
data1: Vec<u64>,
data2: Vec<u64>,
data3: Vec<u64>,
}
impl App {
fn new(crypto: Crypto) -> App {
let mut signal = RandomSignal::new(crypto, 0, 100);
let data1 = signal.by_ref().take(200).collect::<Vec<u64>>();
let data2 = signal.by_ref().take(200).collect::<Vec<u64>>();
let data3 = signal.by_ref().take(200).collect::<Vec<u64>>();
App {
signal,
data1,
data2,
data3,
}
}
fn update(&mut self) {
let value = self.signal.next().unwrap();
self.data1.pop();
self.data1.insert(0, value);
let value = self.signal.next().unwrap();
self.data2.pop();
self.data2.insert(0, value);
let value = self.signal.next().unwrap();
self.data3.pop();
self.data3.insert(0, value);
}
}
#[wasm_bindgen]
pub fn run() -> Result<Option<AnimationFrameCallbackWrapper>, JsValue> {
set_panic_hook();
let window = web_sys::window().expect("no global `window` exists");
let document = window.document().expect("should have a document on window");
let terminal_div = document
.get_element_by_id("terminal")
.expect("should have a terminal div");
let term = Terminal::new(Some(
TerminalOptions::default()
.with_log_level(LogLevel::Debug)
.with_theme(Theme::nord())
.with_font_family("'Fira Mono', monospace")
.with_font_size(11.0),
));
term.open(terminal_div);
let mut term_temp: XtermJsCrosstermBackend = (&term).into();
execute!((&mut term_temp), EnterAlternateScreen).unwrap();
drop(term_temp);
let term: &'static _ = Box::leak(Box::new(term));
let backend = CrosstermBackend::new(term);
let mut tui = TuiTerminal::new(backend).unwrap();
tui.hide_cursor().unwrap();
// Create default app state
let mut app = App::new(window.crypto().unwrap());
let main_loop = AnimationFrameCallbackWrapper::new().leak();
main_loop.safe_start(move || {
tui.draw(
|mut f: tui::terminal::Frame<'_, CrosstermBackend<'_, Vec<u8>>>| {
let chunks = Layout::default()
.direction(Direction::Vertical)
.margin(2)
.constraints(
[
Constraint::Length(3),
Constraint::Length(3),
Constraint::Length(7),
Constraint::Min(0),
]
.as_ref(),
)
.split(f.size());
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data1")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data1)
.style(Style::default().fg(Color::Yellow));
f.render_widget(sparkline, chunks[0]);
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data2")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data2)
.style(Style::default().bg(Color::Green));
f.render_widget(sparkline, chunks[1]);
// Multiline
let sparkline = Sparkline::default()
.block(
Block::default()
.title("Data3")
.borders(Borders::LEFT | Borders::RIGHT),
)
.data(&app.data3)
.style(Style::default().fg(Color::Red));
f.render_widget(sparkline, chunks[2]);
},
)
.unwrap();
app.update();
true
});
Ok(None)
}