/*
* meli - bin.rs
*
* Copyright 2017-2018 Manos Pitsidianakis
*
* This file is part of meli.
*
* meli is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* meli is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with meli. If not, see .
*/
/*! This crate contains the frontend stuff of the application. The application entry way on `src/bin.rs` creates an event loop and passes input to the `ui` module.
The mail handling stuff is done in the `melib` crate which includes all backend needs. The split is done to theoretically be able to create different frontends with the same innards.
*/
use std::alloc::System;
#[global_allocator]
static GLOBAL: System = System;
extern crate melib;
extern crate ui;
pub use melib::*;
pub use ui::*;
use std::thread;
#[macro_use]
extern crate chan;
extern crate chan_signal;
use chan_signal::Signal;
extern crate nix;
fn make_input_thread(
sx: chan::Sender,
rx: chan::Receiver,
) -> thread::JoinHandle<()> {
let stdin = std::io::stdin();
thread::Builder::new()
.name("input-thread".to_string())
.spawn(move || {
get_events(
stdin,
|k| {
sx.send(ThreadEvent::Input(k));
},
|| {
sx.send(ThreadEvent::UIEvent(UIEventType::ChangeMode(
UIMode::Fork,
)));
},
rx,
)
})
.unwrap()
}
fn main() {
/* Lock all stdio outs */
//let _stdout = stdout();
//let mut _stdout = _stdout.lock();
/*
let _stderr = stderr();
let mut _stderr = _stderr.lock();
*/
/* Catch SIGWINCH to handle terminal resizing */
let signal = chan_signal::notify(&[Signal::WINCH]);
/* Create a channel to communicate with other threads. The main process is the sole receiver.
* */
let (sender, receiver) = chan::sync(::std::mem::size_of::());
/*
* Create async channel to block the input-thread if we need to fork and stop it from reading
* stdin, see get_events() for details
* */
let (tx, rx) = chan::async();
/* Get input thread handle to join it if we need to */
let mut _thread_handler = make_input_thread(sender.clone(), rx.clone());
/* Create the application State. This is the 'System' part of an ECS architecture */
let mut state = State::new(sender.clone(), tx);
/* Register some reasonably useful interfaces */
let menu = Entity {
component: Box::new(AccountMenu::new(&state.context.accounts)),
};
let listing = MailListing::new();
let b = Entity {
component: Box::new(listing),
};
let window = Entity {
component: Box::new(VSplit::new(menu, b, 90, true)),
};
let status_bar = Entity {
component: Box::new(StatusBar::new(window)),
};
state.register_entity(status_bar);
let xdg_notifications = Entity {
component: Box::new(ui::components::notifications::XDGNotifications {}),
};
state.register_entity(xdg_notifications);
/* Keep track of the input mode. See ui::UIMode for details */
'main: loop {
state.render();
'inner: loop {
/* Check if any entities have sent reply events to State. */
let events: Vec = state.context.replies();
for e in events {
state.rcv_event(e);
}
state.redraw();
/* Poll on all channels. Currently we have the input channel for stdin, watching events and the signal watcher. */
chan_select! {
receiver.recv() -> r => {
match r.unwrap() {
ThreadEvent::Input(Key::Ctrl('z')) => {
state.to_main_screen();
//_thread_handler.join().expect("Couldn't join on the associated thread");
let self_pid = nix::unistd::Pid::this();
nix::sys::signal::kill(self_pid, nix::sys::signal::Signal::SIGSTOP).unwrap();
state.to_alternate_screen();
_thread_handler = make_input_thread(sender.clone(), rx.clone());
// BUG: thread sends input event after one received key
state.update_size();
state.render();
state.redraw();
},
ThreadEvent::Input(k) => {
match state.mode {
UIMode::Normal => {
match k {
Key::Char('q') | Key::Char('Q') => {
drop(state);
break 'main;
},
Key::Char(';') => {
state.mode = UIMode::Execute;
state.rcv_event(UIEvent { id: 0, event_type: UIEventType::ChangeMode(UIMode::Execute)});
state.redraw();
}
key => {
state.rcv_event(UIEvent { id: 0, event_type: UIEventType::Input(key)});
state.redraw();
},
}
},
UIMode::Execute => {
match k {
Key::Char('\n') | Key::Esc => {
state.mode = UIMode::Normal;
state.rcv_event(UIEvent { id: 0, event_type: UIEventType::ChangeMode(UIMode::Normal)});
state.redraw();
},
k @ Key::Char(_) => {
state.rcv_event(UIEvent { id: 0, event_type: UIEventType::ExInput(k)});
state.redraw();
},
_ => {},
}
},
UIMode::Fork => {
break 'inner; // `goto` 'reap loop, and wait on child.
},
}
},
ThreadEvent::RefreshMailbox { hash : h } => {
eprintln!("got refresh mailbox hash {:x}", h);
//state.rcv_event(UIEvent { id: 0, event_type: UIEventType::Notification(n.clone())});
state.redraw();
/* Don't handle this yet. */
},
ThreadEvent::UIEvent(UIEventType::ChangeMode(f)) => {
state.mode = f;
break 'inner; // `goto` 'reap loop, and wait on child.
}
ThreadEvent::UIEvent(UIEventType::StartupCheck) => {
let mut flag = false;
for account in &mut state.context.accounts {
let len = account.len();
for i in 0..len {
match account.status(i) {
Ok(()) => { },
Err(_) => {
flag |= true;
}
}
}
}
if !flag {
state.finish_startup();
}
state.render();
}
ThreadEvent::UIEvent(e) => {
state.rcv_event(UIEvent { id: 0, event_type: e});
state.render();
},
ThreadEvent::ThreadJoin(id) => {
state.join(id);
},
}
},
signal.recv() -> signal => {
if state.mode != UIMode::Fork {
if let Some(Signal::WINCH) = signal {
state.update_size();
state.render();
state.redraw();
}
}
},
}
} // end of 'inner
'reap: loop {
match state.try_wait_on_child() {
Some(true) => {
make_input_thread(sender.clone(), rx.clone());
state.mode = UIMode::Normal;
state.render();
}
Some(false) => {
use std::{thread, time};
let ten_millis = time::Duration::from_millis(1500);
thread::sleep(ten_millis);
continue 'reap;
}
None => {
break 'reap;
}
}
}
}
}