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use std::fmt::Write as FormatWrite;
use std::io;
use std::io::Stderr;
use std::io::Write;
use std::thread;
use std::thread::JoinHandle;
use libc;
use termion;
use termion::event::Key;
use termion::input::TermRead;
use termion::raw::IntoRawMode;
use termion::raw::RawTerminal;
use backend::*;
use output_log::*;
pub struct RawConsole <'a> {
error_handler: Box <Fn (io::Error) + Send>,
_output: RawTerminal <Stderr>,
_input_thread: JoinHandle <()>,
status_tick_sequence: & 'a [String],
columns: u16,
status_lines: u16,
}
impl <'a> RawConsole <'a> {
pub fn new (
error_handler: Box <Fn (io::Error) + Send>,
status_tick_sequence: & 'a [String],
) -> Option <RawConsole <'a>> {
let output =
match io::stderr ().into_raw_mode () {
Ok (terminal) =>
terminal,
Err (_) =>
return None,
};
let columns =
match termion::terminal_size () {
Ok ((columns, _rows)) =>
columns,
Err (_) => 80,
};
let input_thread =
thread::spawn (
|| Self::input_thread ());
Some (
RawConsole {
error_handler: error_handler,
_output: output,
columns: columns,
status_lines: 0,
_input_thread: input_thread,
status_tick_sequence: status_tick_sequence,
}
)
}
fn input_thread (
) {
let stdin =
io::stdin ();
for key_result in stdin.keys () {
if let Ok (key) = key_result {
match key {
Key::Ctrl ('c') => {
unsafe {
libc::kill (
libc::getpid (),
libc::SIGINT);
}
},
Key::Ctrl ('z') => {
unsafe {
libc::kill (
libc::getpid (),
libc::SIGSTOP);
}
},
_ => {
},
}
}
}
}
fn write_message (
& self,
target: & mut FormatWrite,
message: & str,
) {
write! (
target,
"{}{}\r\n",
if message.len () <= self.columns as usize {
& message
} else {
& message [0 .. self.columns as usize]
},
termion::clear::AfterCursor,
).unwrap ();
}
fn write_running (
& self,
target: & mut FormatWrite,
message: & str,
status: Option <& str>,
) {
if let Some (status) = status {
write! (
target,
"{} ... {}{}\r\n",
if message.len () <= self.columns as usize - status.len () - 5 {
& message
} else {
& message [0 .. self.columns as usize - status.len () - 5]
},
status,
termion::clear::AfterCursor,
).unwrap ();
} else {
write! (
target,
"{} ...{}\r\n",
if message.len () <= self.columns as usize - 4 {
& message
} else {
& message [0 .. self.columns as usize - 4]
},
termion::clear::AfterCursor,
).unwrap ();
}
}
}
impl <'a> Backend for RawConsole <'a> {
fn update (
& mut self,
logs: & [OutputLogInternal],
) {
let mut buffer =
String::new ();
if self.status_lines > 0 {
write! (
buffer,
"\r{}",
termion::cursor::Up (
self.status_lines),
).unwrap ();
}
let old_status_lines = self.status_lines;
self.status_lines = 0;
for log in logs {
if log.state () == OutputLogState::Removed {
continue;
}
if log.state () == OutputLogState::Running
|| self.status_lines > 0 {
self.status_lines += 1;
}
if log.state () == OutputLogState::Running {
if log.denominator () > 0 {
let percent_string =
format! (
"{}%",
log.numerator () * 100 / log.denominator ());
self.write_running (
& mut buffer,
log.message (),
Some (& percent_string));
} else if log.tick () > 0 {
let tick_string =
& self.status_tick_sequence [
(log.tick () as usize - 1)
% self.status_tick_sequence.len ()];
self.write_running (
& mut buffer,
log.message (),
Some (& tick_string));
} else {
self.write_running (
& mut buffer,
log.message (),
None);
}
} else if log.state () == OutputLogState::Complete {
self.write_running (
& mut buffer,
log.message (),
Some ("done"));
} else if log.state () == OutputLogState::Incomplete {
self.write_running (
& mut buffer,
log.message (),
Some ("abort"));
} else if log.state () == OutputLogState::Message {
self.write_message (
& mut buffer,
log.message ());
} else {
unreachable! ();
}
}
if self.status_lines < old_status_lines {
for _index in 0 .. (old_status_lines - self.status_lines) {
write! (
buffer,
"{}\n",
termion::clear::CurrentLine,
).unwrap ();
}
write! (
buffer,
"{}",
termion::cursor::Up (
old_status_lines - self.status_lines),
).unwrap ();
}
write! (
io::stderr (),
"{}",
buffer,
).unwrap_or_else (
|error|
(self.error_handler) (
error)
);
}
}