116 lines
3 KiB
Rust
116 lines
3 KiB
Rust
//! UI library
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mod mail_tab;
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use std::io::Stdout;
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use std::mem;
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use std::time::Duration;
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use anyhow::Result;
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use crossterm::{
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cursor,
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event::{self, Event, KeyCode, KeyEvent},
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style, terminal,
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};
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use futures::{future::FutureExt, select, stream::StreamExt};
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use tokio::{sync::mpsc, time};
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use tui::{
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backend::CrosstermBackend,
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layout::{Constraint, Direction, Layout},
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style::{Color, Modifier, Style},
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text::Spans,
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widgets::*,
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Frame, Terminal,
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};
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use crate::mail::MailEvent;
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use self::mail_tab::render_mail_tab;
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pub(crate) type FrameType<'a, 'b> = Frame<'a, CrosstermBackend<&'b mut Stdout>>;
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const FRAME_DURATION: Duration = Duration::from_millis(17);
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/// Main entrypoint for the UI
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pub async fn run_ui(
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mut stdout: Stdout,
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exit_tx: mpsc::Sender<()>,
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mut mail2ui_rx: mpsc::UnboundedReceiver<MailEvent>,
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) -> Result<()> {
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execute!(stdout, cursor::Hide, terminal::EnterAlternateScreen)?;
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terminal::enable_raw_mode()?;
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let backend = CrosstermBackend::new(&mut stdout);
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let mut term = Terminal::new(backend)?;
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let mut folders = Vec::<String>::new();
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let mut messages = Vec::<String>::new();
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loop {
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term.draw(|f| {
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let chunks = Layout::default()
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.direction(Direction::Vertical)
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.margin(0)
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.constraints([Constraint::Length(1), Constraint::Max(5000)])
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.split(f.size());
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// this is the title bar
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let titles = vec!["hellosu"].into_iter().map(Spans::from).collect();
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let tabs = Tabs::new(titles);
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f.render_widget(tabs, chunks[0]);
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render_mail_tab(f, chunks[1], &folders, &messages);
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})?;
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let event = if event::poll(FRAME_DURATION)? {
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let event = event::read()?;
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// table.update(&event);
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if let Event::Key(KeyEvent {
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code: KeyCode::Char('q'),
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..
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}) = event
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{
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break;
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}
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Some(event)
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} else {
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None
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};
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select! {
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mail_evt = mail2ui_rx.recv().fuse() => {
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debug!("received mail event: {:?}", mail_evt);
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// TODO: handle case that channel is closed later
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let mail_evt = mail_evt.unwrap();
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match mail_evt {
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MailEvent::FolderList(new_folders) => {
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folders = new_folders;
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}
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MailEvent::MessageList(new_messages) => {
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messages = new_messages;
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}
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}
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}
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// approx 60fps
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_ = time::sleep(FRAME_DURATION).fuse() => {}
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}
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}
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mem::drop(term);
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execute!(
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stdout,
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style::ResetColor,
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cursor::Show,
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terminal::LeaveAlternateScreen
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)?;
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terminal::disable_raw_mode()?;
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exit_tx.send(()).await?;
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debug!("sent exit");
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Ok(())
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}
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