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use std::io::Write;
use std::sync::Mutex;
use std::sync::Arc;
use crate::coordinates::{Coordinates, Position, Size};
use crate::files::{File, Files, Kind};
use crate::listview::ListView;
use crate::textview::TextView;
use crate::widget::Widget;
lazy_static! {
static ref PIDS: Arc<Mutex<Vec<u32>>> = { Arc::new(Mutex::new(vec![])) };
static ref CURFILE: Arc<Mutex<Option<File>>> = { Arc::new(Mutex::new(None)) };
}
fn kill_procs() {
let mut pids = PIDS.lock().unwrap();
for pid in &*pids {
unsafe { libc::kill(*pid as i32, 9); }
}
pids.clear();
}
fn is_current(file: &File) -> bool {
CURFILE.lock().unwrap().as_ref().unwrap() == file
}
#[derive(PartialEq)]
pub struct Previewer {
pub file: Option<File>,
pub buffer: String,
pub coordinates: Coordinates,
}
impl Previewer {
pub fn new() -> Previewer {
Previewer {
file: None,
buffer: String::new(),
coordinates: Coordinates::new(),
}
}
pub fn set_file(&mut self, file: &File) {
let coordinates = self.coordinates.clone();
let file = file.clone();
let redraw = crate::term::reset() + &self.get_redraw_empty_list(0);
*CURFILE.lock().unwrap() = Some(file.clone());
std::thread::spawn(move || {
kill_procs();
match &file.kind {
Kind::Directory => match Files::new_from_path(&file.path) {
Ok(files) => {
if !is_current(&file) { return }
let len = files.len();
if len == 0 { return };
let mut file_list = ListView::new(files);
file_list.set_coordinates(&coordinates);
file_list.refresh();
if !is_current(&file) { return }
file_list.animate_slide_up();
}
Err(err) => {
crate::window::show_status(&format!("Can't preview because: {}", err));
}
},
_ => {
if file.get_mime() == Some("text".to_string()) {
let mut textview = TextView::new_from_file(&file);
if !is_current(&file) { return }
textview.set_coordinates(&coordinates);
textview.refresh();
if !is_current(&file) { return }
textview.animate_slide_up();
} else {
let process =
std::process::Command::new("scope.sh")
.arg(&file.name)
.arg("10".to_string())
.arg("10".to_string())
.arg("".to_string())
.arg("false".to_string())
.stdin(std::process::Stdio::null())
.stdout(std::process::Stdio::piped())
.stderr(std::process::Stdio::null())
.spawn().unwrap();
let pid = process.id();
PIDS.lock().unwrap().push(pid);
if !is_current(&file) { return }
let output = process.wait_with_output();
if output.is_err() { return }
let output = output.unwrap();
let status = output.status.code();
if status.is_none() { return }
let status = status.unwrap();
if status == 0 || status == 5 && is_current(&file) {
let output = std::str::from_utf8(&output.stdout)
.unwrap()
.to_string();
let mut textview = TextView {
lines: output.lines().map(|s| s.to_string()).collect(),
buffer: String::new(),
coordinates: Coordinates::new() };
textview.set_coordinates(&coordinates);
textview.refresh();
textview.animate_slide_up();
} else
{
write!(std::io::stdout(), "{}", redraw).unwrap();
}
PIDS.lock().unwrap().remove_item(&pid);
}
}
}
});
}
}
impl Widget for Previewer {
fn get_size(&self) -> &Size {
&self.coordinates.size
}
fn set_size(&mut self, size: Size) {
self.coordinates.size = size;
}
fn get_position(&self) -> &Position {
&self.coordinates.position
}
fn set_position(&mut self, pos: Position) {
self.coordinates.position = pos;
}
fn get_coordinates(&self) -> &Coordinates {
&self.coordinates
}
fn set_coordinates(&mut self, coordinates: &Coordinates) {
if self.coordinates == *coordinates {
return;
}
self.coordinates = coordinates.clone();
self.refresh();
}
fn render_header(&self) -> String {
"".to_string()
}
fn refresh(&mut self) {
let file = self.file.clone();
if let Some(file) = file {
self.set_file(&file);
}
}
fn get_drawlist(&self) -> String {
self.buffer.clone()
}
}
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