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#[derive(Debug, Clone)]
pub struct Frame {
screen: vt100::Screen,
delay: std::time::Duration,
}
impl Frame {
pub fn new(screen: vt100::Screen, delay: std::time::Duration) -> Self {
Self { screen, delay }
}
pub fn into_screen(self) -> vt100::Screen {
self.screen
}
pub fn delay(&self) -> std::time::Duration {
self.delay
}
}
pub struct FrameData {
frames: Vec<Frame>,
done_reading: bool,
new_frame_w: tokio::sync::watch::Sender<Option<usize>>,
new_frame_r: tokio::sync::watch::Receiver<Option<usize>>,
}
impl FrameData {
pub fn new() -> Self {
let (new_frame_w, new_frame_r) = tokio::sync::watch::channel(Some(0));
Self {
frames: vec![],
done_reading: false,
new_frame_w,
new_frame_r,
}
}
pub fn get(&self, i: usize) -> Option<&Frame> {
self.frames.get(i)
}
pub fn count(&self) -> usize {
self.frames.len()
}
pub fn search(
&self,
start: usize,
query: &str,
backwards: bool,
) -> Option<usize> {
if backwards {
self.frames
.iter()
.enumerate()
.rev()
.skip(self.frames.len() - start + 1)
.find(|(_, frame)| frame.screen.contents().contains(query))
.map(|(i, _)| i)
} else {
self.frames
.iter()
.enumerate()
.skip(start)
.find(|(_, frame)| frame.screen.contents().contains(query))
.map(|(i, _)| i)
}
}
pub async fn add_frame(&mut self, frame: Frame) {
self.frames.push(frame);
self.new_frame_w
.send(Some(self.frames.len()))
// new_frame_w is never closed, so this can never fail
.unwrap();
}
pub async fn done_reading(&mut self) {
self.done_reading = true;
self.new_frame_w
.send(None)
// new_frame_w is never closed, so this can never fail
.unwrap();
}
pub fn wait_for_frame(
&self,
i: usize,
) -> std::pin::Pin<
Box<dyn std::future::Future<Output = bool> + 'static + Send>,
> {
if i < self.frames.len() {
return Box::pin(std::future::ready(true));
}
if self.done_reading {
return Box::pin(std::future::ready(false));
}
let mut new_frame_r = self.new_frame_r.clone();
Box::pin(async move {
while new_frame_r.changed().await.is_ok() {
if let Some(new_len) = *new_frame_r.borrow() {
if i < new_len {
return true;
}
} else {
break;
}
}
false
})
}
}
pub fn load_from_file(
frames: std::sync::Arc<tokio::sync::Mutex<FrameData>>,
fh: tokio::fs::File,
event_w: tokio::sync::mpsc::UnboundedSender<crate::event::Event>,
clamp: Option<u64>,
) {
let clamp = clamp.map(std::time::Duration::from_millis);
tokio::task::spawn(async move {
let mut reader = ttyrec::Reader::new(fh);
let size = terminal_size::terminal_size().map_or(
(24, 80),
|(terminal_size::Width(w), terminal_size::Height(h))| (h, w),
);
let mut parser = vt100::Parser::new(size.0, size.1, 0);
let mut prev_delay = std::time::Duration::from_secs(0);
let mut clamped_amount = std::time::Duration::from_secs(0);
while let Ok(frame) = reader.read_frame().await {
let mut delay = reader.offset().map_or_else(
|| std::time::Duration::from_secs(0),
|offset| frame.time - offset - clamped_amount,
);
if let Some(clamp) = clamp {
let clamped_delay = delay.min(prev_delay + clamp);
if clamped_delay < delay {
clamped_amount += delay - clamped_delay;
delay = clamped_delay;
}
}
parser.process(&frame.data);
let mut frames = frames.clone().lock_owned().await;
frames
.add_frame(Frame::new(parser.screen().clone(), delay))
.await;
event_w
.send(crate::event::Event::FrameLoaded(Some(frames.count())))
// event_w is never closed, so this can never fail
.unwrap();
prev_delay = delay;
}
frames.lock_owned().await.done_reading().await;
event_w
.send(crate::event::Event::FrameLoaded(None))
// event_w is never closed, so this can never fail
.unwrap();
});
}
|
