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use std::path::{Path, PathBuf};
use std::process::{Command, Stdio};
use std::io::{BufReader, BufRead};
use std::sync::atomic::{AtomicU32, Ordering};
use crate::widget::{Widget, WidgetCore};
use crate::coordinates::Coordinates;
use crate::fail::{HResult, ErrorCause};
use crate::mediaview::MediaError;
lazy_static! {
static ref PID: AtomicU32 = AtomicU32::new(0);
}
#[derive(Derivative)]
#[derivative(PartialEq)]
pub struct ImgView {
pub core: WidgetCore,
pub buffer: Vec<String>,
pub file: Option<PathBuf>,
}
impl ImgView {
pub fn new_from_file(core: WidgetCore, file: &Path) -> HResult<ImgView> {
let mut view = ImgView {
core: core,
buffer: vec![],
file: Some(file.to_path_buf()),
};
view.encode_file()?;
Ok(view)
}
pub fn encode_file(&mut self) -> HResult<()> {
let (xsize, ysize) = self.core.coordinates.size_u();
let (xpix, ypix) = self.core.coordinates.size_pixels()?;
let cell_ratio = crate::term::cell_ratio()?;
let file = &self.file.as_ref()?;
let media_previewer = self.core.config().media_previewer;
let g_mode = self.core.config().graphics;
let mut previewer = Command::new(&media_previewer)
.arg(format!("{}", (xsize+1)))
.arg(format!("{}", (ysize+1)))
.arg(format!("{}", xpix))
.arg(format!("{}", ypix))
.arg(format!("{}", cell_ratio))
.arg("image")
.arg(format!("true"))
.arg(format!("true"))
.arg(format!("{}", g_mode))
.arg(file.to_string_lossy().to_string())
.stdin(Stdio::null())
.stdout(Stdio::piped())
.stderr(Stdio::piped())
.spawn()
.map_err(|e| {
let msg = format!("Couldn't run {}{}{}! Error: {:?}",
crate::term::color_red(),
media_previewer,
crate::term::normal_color(),
&e.kind());
self.core.show_status(&msg).ok();
MediaError::NoPreviewer(msg)
})?;
PID.store(previewer.id(), Ordering::Relaxed);
let stdout = previewer.stdout
.take()
.unwrap();
let output = BufReader::new(stdout)
.lines()
.collect::<Result<Vec<String>, _>>()?;
let stderr = previewer.stderr
.take()
.unwrap();
let stderr = BufReader::new(stderr)
.lines()
.collect::<Result<String, _>>()?;
let status = previewer.wait()?;
PID.store(0, Ordering::Relaxed);
if !status.success() {
match status.code() {
Some(code) => Err(MediaError::MediaViewerFailed(code,
ErrorCause::Str(stderr)))?,
None => Err(MediaError::MediaViewerKilled)?
}
}
self.buffer = output;
Ok(())
}
pub fn set_image_data(&mut self, img_data: Vec<String>) {
self.buffer = img_data;
}
pub fn lines(&self) -> usize {
self.buffer.len()
}
pub fn kill_running() {
use nix::{unistd::Pid,
sys::signal::{kill, Signal}};
let pid = PID.load(Ordering::Relaxed);
if pid == 0 { return; }
let pid = Pid::from_raw(pid as i32);
kill(pid, Signal::SIGTERM).ok();
PID.store(0, Ordering::Relaxed);
}
}
impl Widget for ImgView {
fn get_core(&self) -> HResult<&WidgetCore> {
Ok(&self.core)
}
fn get_core_mut(&mut self) -> HResult<&mut WidgetCore> {
Ok(&mut self.core)
}
fn set_coordinates(&mut self, coordinates: &Coordinates) -> HResult<()> {
if &self.core.coordinates == coordinates { return Ok(()) }
self.core.coordinates = coordinates.clone();
if self.file.is_some() {
self.encode_file()?;
}
Ok(())
}
fn refresh(&mut self) -> HResult<()> {
Ok(())
}
fn get_drawlist(&self) -> HResult<String> {
let (xpos, ypos) = self.core.coordinates.position_u();
let mut draw = self.buffer
.iter()
.enumerate()
.fold(String::new(), |mut draw, (pos, line)| {
draw += &format!("{}", crate::term::goto_xy_u(xpos,
ypos + pos));
draw += line;
draw
});
draw += &format!("{}", termion::style::Reset);
Ok(draw)
}
}
impl Drop for ImgView {
fn drop(&mut self) {
let g_mode = self.core.config().graphics;
if g_mode == "kitty" || g_mode == "auto" {
print!("\x1b_Ga=d\x1b\\");
}
}
}
|
