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