Adds support for kill and restart

src/lib.rs

@@ -136,11 +136,34 @@ impl<W: Write> Multiview<W> {
     pub fn push_stderr(&mut self, (i, j): (u16, u16), content: String) {
         self.push_stdout((i, j), content);
     }
+
+    /// Restarts the selected tile.
+    pub fn restart(&mut self) -> io::Result<()> {
+        let tile = self.tile_mut(self.selected);
+        tile.restart()
+    }
+
+    /// Restarts all tiles.
+    pub fn restart_all(&mut self) -> io::Result<()> {
+        for row in &mut self.tiles {
+            for tile in row {
+                tile.restart()?;
+            }
+        }
+
+        Ok(())
+    }
 }
 
 impl<W: Write> Drop for Multiview<W> {
     fn drop(&mut self) {
         write!(self.stdout, "{}", cursor::Show).unwrap();
+
+        for row in &mut self.tiles {
+            for tile in row {
+                tile.kill().ok();
+            }
+        }
     }
 }
 
@@ -155,6 +178,12 @@ pub enum Msg {
     /// A click occured.
     Click(u16, u16),
 
+    /// Restarts the selected tile.
+    Restart,
+
+    /// Restarts all tiles.
+    RestartAll,
+
     /// Scroll up one line.
     ScrollUp,
 
@@ -233,6 +262,8 @@ pub fn main() -> io::Result<()> {
             let evt = c.unwrap();
             match evt {
                 Event::Key(Key::Char('q')) => sender.send(Msg::Exit).unwrap(),
+                Event::Key(Key::Char('r')) => sender.send(Msg::Restart).unwrap(),
+                Event::Key(Key::Char('R')) => sender.send(Msg::RestartAll).unwrap(),
                 Event::Key(Key::Down) => sender.send(Msg::ScrollDown).unwrap(),
                 Event::Key(Key::Up) => sender.send(Msg::ScrollUp).unwrap(),
                 Event::Key(Key::End) => sender.send(Msg::ScrollFullDown).unwrap(),
@@ -255,6 +286,8 @@ pub fn main() -> io::Result<()> {
             Ok(Msg::Stderr(coords, line)) => multiview.push_stderr(coords, line),
             Ok(Msg::Click(x, y)) => multiview.select_tile((x, y), term_size),
             Ok(Msg::ScrollDown) => multiview.scroll_down(),
+            Ok(Msg::Restart) => multiview.restart()?,
+            Ok(Msg::RestartAll) => multiview.restart_all()?,
             Ok(Msg::ScrollUp) => multiview.scroll_up(),
             Ok(Msg::ScrollFullDown) => multiview.scroll_full_down(),
             Ok(Msg::ScrollFullUp) => multiview.scroll_full_up(),

src/tile.rs

@@ -1,7 +1,7 @@
 //! This module contains everything related to tiles.
 
-use std::io::Read;
-use std::process::Stdio;
+use std::io::{self, Read};
+use std::process::{Child, Stdio};
 use std::sync::mpsc::Sender;
 use std::thread;
 
@@ -96,12 +96,12 @@ impl TileBuilder {
             number_lines: 1,
             counting: true,
             column_number: 0,
+            child: None,
         })
     }
 }
 
 /// A tile with a command running inside it.
-#[derive(Debug)]
 pub struct Tile {
     /// The command that should be executed in the tile.
     pub command: Vec<String>,
@@ -145,6 +145,9 @@ pub struct Tile {
 
     /// The number of the current column.
     pub column_number: u16,
+
+    /// The PTY and the child process of the command running in the tile.
+    pub child: Option<(Pty, Child)>,
 }
 
 impl Tile {
@@ -161,7 +164,6 @@ impl Tile {
         let size = self.inner_size;
         let sender = self.sender.clone();
 
-        thread::spawn(move || {
         let pty = Pty::new().unwrap();
         pty.resize(pty_process::Size::new(size.1, size.0)).unwrap();
 
@@ -178,6 +180,26 @@ impl Tile {
 
         let coords = coords;
 
+        thread::spawn(move || loop {
+            let mut buffer = [0; 4096];
+            let result = stdout.read(&mut buffer);
+
+            match result {
+                Ok(0) => break,
+
+                Ok(n) => {
+                    sender
+                        .send(Msg::Stderr(
+                            coords,
+                            String::from_utf8_lossy(&buffer[0..n]).to_string(),
+                        ))
+                        .unwrap();
+                }
+
+                Err(_) => break,
+            }
+        });
+
         thread::spawn(move || loop {
             let mut buffer = [0; 4096];
             let result = stderr.read(&mut buffer);
@@ -198,46 +220,7 @@ impl Tile {
             }
         });
 
-            loop {
-                let mut buffer = [0; 4096];
-                let result = stdout.read(&mut buffer);
-
-                match result {
-                    Ok(0) => break,
-
-                    Ok(n) => {
-                        sender
-                            .send(Msg::Stderr(
-                                coords,
-                                String::from_utf8_lossy(&buffer[0..n]).to_string(),
-                            ))
-                            .unwrap();
-                    }
-
-                    Err(_) => break,
-                }
-            }
-
-            sender
-                .send(Msg::Stdout(coords, String::from("\n")))
-                .unwrap();
-
-            let code = child.wait().unwrap().code().unwrap();
-
-            let exit_string = format!(
-                "{}{}Command exited with return code {}{}\n",
-                style::Bold,
-                if code == 0 {
-                    color::Green.fg_str()
-                } else {
-                    color::Red.fg_str()
-                },
-                code,
-                style::Reset,
-            );
-
-            sender.send(Msg::Stdout(coords, exit_string)).unwrap();
-        });
+        self.child = Some((pty, child));
     }
 
     /// Push content into the stdout of the tile.
@@ -456,4 +439,20 @@ impl Tile {
             self.scroll = 0;
         }
     }
+
+    /// Kill the child command.
+    pub fn kill(&mut self) -> io::Result<()> {
+        if let Some((_, child)) = self.child.as_mut() {
+            child.kill()?;
+        }
+
+        Ok(())
+    }
+
+    /// Restarts the child command.
+    pub fn restart(&mut self) -> io::Result<()> {
+        self.kill()?;
+        self.start();
+        Ok(())
+    }
 }