81 lines
1.6 KiB
Rust
81 lines
1.6 KiB
Rust
use std::{
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io::Write,
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os::fd::AsRawFd,
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};
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use crossterm::{
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cursor::MoveTo,
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terminal::{EnterAlternateScreen, LeaveAlternateScreen},
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ExecutableCommand,
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};
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use crate::Result;
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pub(crate) struct AlternateScreen<'a, W>
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where
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W: Write + AsRawFd + Sized,
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{
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write: &'a mut W,
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}
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impl<'a, W> AlternateScreen<'a, W>
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where
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W: Write + AsRawFd + Sized,
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{
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pub(crate) fn new(write_handle: &'a mut W) -> Result<Self> {
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write_handle.execute(EnterAlternateScreen)?.execute(MoveTo(0, 0))?;
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Ok(Self {
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write: write_handle,
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})
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}
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}
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impl<W> Write for AlternateScreen<'_, W>
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where
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W: Write + AsRawFd + Sized,
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{
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fn write(&mut self, buf: &[u8]) -> std::io::Result<usize> {
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self.write.write(buf)
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}
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fn flush(&mut self) -> std::io::Result<()> {
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self.write.flush()
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}
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}
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impl<W> AsRawFd for AlternateScreen<'_, W>
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where
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W: Write + AsRawFd + Sized,
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{
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fn as_raw_fd(&self) -> std::os::fd::RawFd {
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self.write.as_raw_fd()
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}
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}
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/*
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impl<W> ExecutableCommand for AlternateScreen<W>
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where
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W: Write + AsRawFd + Sized,
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{
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fn execute(&mut self, command: impl crossterm::Command) -> std::io::Result<&mut Self> {
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let mut write = self.write.lock().unwrap();
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match write.execute(command) {
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Ok(_) => {
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drop(write);
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Ok(self)
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}
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Err(e) => Err(e),
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}
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}
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}
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*/
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impl<W> Drop for AlternateScreen<'_, W>
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where
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W: Write + AsRawFd + Sized,
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{
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fn drop(&mut self) {
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self.write.execute(LeaveAlternateScreen).unwrap();
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}
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}
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