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/*
* 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 <http://www.gnu.org/licenses/>.
*/
//!
//! 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 a thread.
//!
//! 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;
use std::collections::VecDeque;
use std::path::PathBuf;
#[macro_use]
extern crate serde_derive;
extern crate linkify;
extern crate uuid;
extern crate bitflags;
extern crate serde_json;
#[macro_use]
extern crate smallvec;
extern crate termion;
#[global_allocator]
static GLOBAL: System = System;
#[macro_use]
extern crate melib;
use melib::*;
mod unix;
use unix::*;
#[macro_use]
pub mod types;
use crate::types::*;
#[macro_use]
pub mod terminal;
use crate::terminal::*;
#[macro_use]
pub mod command;
use crate::command::*;
pub mod state;
use crate::state::*;
pub mod components;
use crate::components::*;
#[macro_use]
pub mod conf;
use crate::conf::*;
#[cfg(feature = "sqlite3")]
pub mod sqlite3;
pub mod jobs;
pub mod mailcap;
use std::os::raw::c_int;
fn notify(
signals: &[c_int],
sender: crossbeam::channel::Sender<ThreadEvent>,
) -> std::result::Result<crossbeam::channel::Receiver<c_int>, std::io::Error> {
use std::time::Duration;
let (alarm_pipe_r, alarm_pipe_w) = nix::unistd::pipe().map_err(|err| {
std::io::Error::from_raw_os_error(err.as_errno().map(|n| n as i32).unwrap_or(0))
})?;
let alarm_handler = move |info: &nix::libc::siginfo_t| {
let value = unsafe { info.si_value().sival_ptr as u8 };
let _ = nix::unistd::write(alarm_pipe_w, &[value]);
};
unsafe {
signal_hook_registry::register_sigaction(signal_hook::SIGALRM, alarm_handler)?;
}
let (s, r) = crossbeam::channel::bounded(100);
let signals = signal_hook::iterator::Signals::new(signals)?;
let _ = nix::fcntl::fcntl(
alarm_pipe_r,
nix::fcntl::FcntlArg::F_SETFL(nix::fcntl::OFlag::O_NONBLOCK),
);
std::thread::spawn(move || {
let mut buf = [0; 1];
let mut ctr = 0;
loop {
ctr %= 3;
if ctr == 0 {
let _ = sender
.send_timeout(ThreadEvent::Pulse, Duration::from_millis(500))
.ok();
}
for signal in signals.pending() {
let _ = s.send_timeout(signal, Duration::from_millis(500)).ok();
}
while nix::unistd::read(alarm_pipe_r, buf.as_mut())
.map(|s| s > 0)
.unwrap_or(false)
{
let value = buf[0];
let _ = sender.send_timeout(
ThreadEvent::UIEvent(UIEvent::Timer(value)),
Duration::from_millis(2000),
);
}
std::thread::sleep(std::time::Duration::from_millis(100));
ctr += 1;
}
});
Ok(r)
}
fn parse_manpage(src: &str) -> Result<ManPages> {
match src {
"" | "meli" | "main" => Ok(ManPages::Main),
"meli.conf" | "conf" | "config" | "configuration" => Ok(ManPages::Conf),
"meli-themes" | "themes" | "theming" | "theme" => Ok(ManPages::Themes),
_ => Err(MeliError::new(format!(
"Invalid documentation page: {}",
src
))),
}
}
use structopt::StructOpt;
#[derive(Copy, Clone, Debug)]
/// Choose manpage
enum ManPages {
/// meli(1)
Main = 0,
/// meli.conf(5)
Conf = 1,
/// meli-themes(5)
Themes = 2,
}
#[derive(Debug, StructOpt)]
#[structopt(name = "meli", about = "terminal mail client", version_short = "v")]
struct Opt {
/// use specified configuration file
#[structopt(short, long, parse(from_os_str))]
config: Option<PathBuf>,
#[structopt(subcommand)]
subcommand: Option<SubCommand>,
}
#[derive(Debug, StructOpt)]
enum SubCommand {
/// print default theme in full to stdout and exit.
PrintDefaultTheme,
/// print loaded themes in full to stdout and exit.
PrintLoadedThemes,
/// create a sample configuration file with available configuration options. If PATH is not specified, meli will try to create it in $XDG_CONFIG_HOME/meli/config.toml
#[structopt(display_order = 1)]
CreateConfig {
#[structopt(value_name = "NEW_CONFIG_PATH", parse(from_os_str))]
path: Option<PathBuf>,
},
/// test a configuration file for syntax issues or missing options.
#[structopt(display_order = 2)]
TestConfig {
#[structopt(value_name = "CONFIG_PATH", parse(from_os_str))]
path: Option<PathBuf>,
},
#[structopt(visible_alias="docs", aliases=&["docs", "manpage", "manpages"])]
#[structopt(display_order = 3)]
/// print documentation page and exit (Piping to a pager is recommended.).
Man(ManOpt),
/// View mail from input file.
View {
#[structopt(value_name = "INPUT", parse(from_os_str))]
path: PathBuf,
},
}
#[derive(Debug, StructOpt)]
struct ManOpt {
#[structopt(default_value = "meli", possible_values=&["meli", "conf", "themes"], value_name="PAGE", parse(try_from_str = parse_manpage))]
page: ManPages,
/// If true, output text in stdout instead of spawning $PAGER.
#[structopt(long = "no-raw", alias = "no-raw", value_name = "bool")]
no_raw: Option<Option<bool>>,
}
fn main() {
let opt = Opt::from_args();
::std::process::exit(match run_app(opt) {
Ok(()) => 0,
Err(err) => {
eprintln!("{}", err);
1
}
});
}
fn run_app(opt: Opt) -> Result<()> {
if let Some(config_location) = opt.config.as_ref() {
std::env::set_var("MELI_CONFIG", config_location);
}
match opt.subcommand {
Some(SubCommand::TestConfig { path }) => {
let config_path = if let Some(path) = path {
path
} else {
crate::conf::get_config_file()?
};
conf::FileSettings::validate(config_path)?;
return Ok(());
}
Some(SubCommand::CreateConfig { path }) => {
let config_path = if let Some(path) = path {
path
} else {
crate::conf::get_config_file()?
};
if config_path.exists() {
return Err(MeliError::new(format!(
"File `{}` already exists.\nMaybe you meant to specify another path?",
config_path.display()
)));
}
conf::create_config_file(&config_path)?;
return Ok(());
}
#[cfg(feature = "cli-docs")]
Some(SubCommand::Man(manopt)) => {
let ManOpt { page, no_raw } = manopt;
const MANPAGES: [&'static [u8]; 3] = [
include_bytes!(concat!(env!("OUT_DIR"), "/meli.txt.gz")),
include_bytes!(concat!(env!("OUT_DIR"), "/meli.conf.txt.gz")),
include_bytes!(concat!(env!("OUT_DIR"), "/meli-themes.txt.gz")),
];
use flate2::bufread::GzDecoder;
use std::io::prelude::*;
let mut gz = GzDecoder::new(MANPAGES[page as usize]);
let mut v = String::with_capacity(
str::parse::<usize>(unsafe {
std::str::from_utf8_unchecked(gz.header().unwrap().comment().unwrap())
})
.expect(&format!(
"{:?} was not compressed with size comment header",
page
)),
);
gz.read_to_string(&mut v)?;
if let Some(no_raw) = no_raw {
match no_raw {
Some(true) => {}
None if (unsafe { libc::isatty(libc::STDOUT_FILENO) == 1 }) => {}
Some(false) | None => {
println!("{}", &v);
return Ok(());
}
}
} else {
if unsafe { libc::isatty(libc::STDOUT_FILENO) != 1 } {
println!("{}", &v);
return Ok(());
}
}
use std::process::{Command, Stdio};
let mut handle = Command::new(std::env::var("PAGER").unwrap_or("more".to_string()))
.stdin(Stdio::piped())
.stdout(Stdio::inherit())
.stderr(Stdio::inherit())
.spawn()?;
handle.stdin.take().unwrap().write_all(v.as_bytes())?;
handle.wait()?;
return Ok(());
}
#[cfg(not(feature = "cli-docs"))]
Some(SubCommand::Man(_manopt)) => {
return Err(MeliError::new("error: this version of meli was not build with embedded documentation. You might have it installed as manpages (eg `man meli`), otherwise check https://meli.delivery"));
}
Some(SubCommand::PrintLoadedThemes) => {
let s = conf::FileSettings::new()?;
print!("{}", s.terminal.themes.to_string());
return Ok(());
}
Some(SubCommand::PrintDefaultTheme) => {
print!("{}", conf::Themes::default().key_to_string("dark", false));
return Ok(());
}
Some(SubCommand::View { ref path }) => {
if !path.exists() {
return Err(MeliError::new(format!(
"`{}` is not a valid path",
path.display()
)));
} else if !path.is_file() {
return Err(MeliError::new(format!(
"`{}` is a directory",
path.display()
)));
}
}
None => {}
}
/* Create a channel to communicate with other threads. The main process is the sole receiver.
* */
let (sender, receiver) = crossbeam::channel::bounded(32 * ::std::mem::size_of::<ThreadEvent>());
/* Catch SIGWINCH to handle terminal resizing */
let signals = &[
/* Catch SIGWINCH to handle terminal resizing */
signal_hook::SIGWINCH,
/* Catch SIGCHLD to handle embed applications status change */
signal_hook::SIGCHLD,
];
let signal_recvr = notify(signals, sender.clone())?;
/* Create the application State. */
let mut state;
if let Some(SubCommand::View { path }) = opt.subcommand {
let bytes = std::fs::read(&path)
.chain_err_summary(|| format!("Could not read from `{}`", path.display()))?;
let wrapper = Mail::new(bytes, Some(Flag::SEEN))
.chain_err_summary(|| format!("Could not parse `{}`", path.display()))?;
state = State::new(
Some(Settings::without_accounts().unwrap_or_default()),
sender,
receiver.clone(),
)?;
state.register_component(Box::new(EnvelopeView::new(wrapper, None, None, 0)));
} else {
state = State::new(None, sender, receiver.clone())?;
#[cfg(feature = "svgscreenshot")]
state.register_component(Box::new(components::svg::SVGScreenshotFilter::new()));
let window = Box::new(Tabbed::new(
vec![
Box::new(listing::Listing::new(&mut state.context)),
Box::new(ContactList::new(&state.context)),
Box::new(StatusPanel::new(crate::conf::value(
&state.context,
"theme_default",
))),
],
&state.context,
));
let status_bar = Box::new(StatusBar::new(&state.context, window));
state.register_component(status_bar);
#[cfg(feature = "dbus-notifications")]
{
let dbus_notifications = Box::new(components::notifications::DbusNotifications::new());
state.register_component(dbus_notifications);
}
state.register_component(Box::new(
components::notifications::NotificationCommand::new(),
));
}
let enter_command_mode: Key = state
.context
.settings
.shortcuts
.general
.enter_command_mode
.clone();
/* Keep track of the input mode. See UIMode for details */
'main: loop {
state.render();
'inner: loop {
/* Check if any components have sent reply events to State. */
let events: smallvec::SmallVec<[UIEvent; 8]> = 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. */
crossbeam::select! {
recv(receiver) -> r => {
match r {
Ok(ThreadEvent::Pulse) | Ok(ThreadEvent::UIEvent(UIEvent::Timer(_))) => {},
_ => {debug!(&r);}
}
match r.unwrap() {
ThreadEvent::Input((Key::Ctrl('z'), _)) if state.mode != UIMode::Embed => {
state.switch_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.switch_to_alternate_screen();
// BUG: thread sends input event after one received key
state.update_size();
state.render();
state.redraw();
},
ThreadEvent::Input(raw_input @ (Key::Ctrl('l'), _)) => {
/* Manual screen redraw */
state.update_size();
state.render();
state.redraw();
if state.mode == UIMode::Embed {
state.rcv_event(UIEvent::EmbedInput(raw_input));
state.redraw();
}
},
ThreadEvent::Input((k, r)) => {
match state.mode {
UIMode::Normal => {
match k {
Key::Char('q') | Key::Char('Q') => {
if state.can_quit_cleanly() {
drop(state);
break 'main;
} else {
state.redraw();
}
},
_ if k == enter_command_mode => {
state.mode = UIMode::Command;
state.rcv_event(UIEvent::ChangeMode(UIMode::Command));
state.redraw();
}
key => {
state.rcv_event(UIEvent::Input(key));
state.redraw();
},
}
},
UIMode::Insert => {
match k {
Key::Char('\n') | Key::Esc => {
state.mode = UIMode::Normal;
state.rcv_event(UIEvent::ChangeMode(UIMode::Normal));
state.redraw();
},
k => {
state.rcv_event(UIEvent::InsertInput(k));
state.redraw();
},
}
}
UIMode::Command => {
match k {
Key::Char('\n') => {
state.mode = UIMode::Normal;
state.rcv_event(UIEvent::ChangeMode(UIMode::Normal));
state.redraw();
},
k => {
state.rcv_event(UIEvent::CmdInput(k));
state.redraw();
},
}
},
UIMode::Embed => {
state.rcv_event(UIEvent::EmbedInput((k,r)));
state.redraw();
},
UIMode::Fork => {
break 'inner; // `goto` 'reap loop, and wait on child.
},
}
},
ThreadEvent::RefreshMailbox(event) => {
state.refresh_event(*event);
state.redraw();
},
ThreadEvent::UIEvent(UIEvent::ChangeMode(f)) => {
state.mode = f;
if f == UIMode::Fork {
break 'inner; // `goto` 'reap loop, and wait on child.
}
}
ThreadEvent::UIEvent(e) => {
state.rcv_event(e);
state.redraw();
},
ThreadEvent::Pulse => {
state.check_accounts();
state.redraw();
},
ThreadEvent::JobFinished(id) => {
debug!("Job finished {}", id);
for account in state.context.accounts.values_mut() {
if account.process_event(&id) {
break;
}
}
//state.new_thread(id, name);
},
}
},
recv(signal_recvr) -> sig => {
match sig.unwrap() {
signal_hook::SIGWINCH => {
if state.mode != UIMode::Fork {
state.update_size();
state.render();
state.redraw();
}
},
signal_hook::SIGCHLD => {
state.rcv_event(UIEvent::EmbedInput((Key::Null, vec![0])));
state.redraw();
}
other => {
debug!("got other signal: {:?}", other);
}
}
},
}
} // end of 'inner
'reap: loop {
match state.try_wait_on_child() {
Some(true) => {
state.restore_input();
state.switch_to_alternate_screen();
}
Some(false) => {
use std::{thread, time};
let ten_millis = time::Duration::from_millis(1500);
thread::sleep(ten_millis);
continue 'reap;
}
None => {
state.mode = UIMode::Normal;
state.render();
break 'reap;
}
}
}
}
Ok(())
}