Pseudo terminal

[fswarbrick]

I'm trying to figure out what method is triggered when, in terminal mode, the terminal application writes to stdout. Can anyone assist?

[niten94]

I tried looking at the code but I do not think there is a method called when something is written in stdout in terminal mode.

Panes are drawn when pane.Display is called in DoEvent in cmd/micro/micro.go. The method is not defined in action.TermPane in internal/action/termpane.go but methods in display.Window can be called on TermPane. The window of TermPane is set with a new display.TermWindow instance in NewTermPane in the file.

The terminal state drawn in TermWindow.Display is updated when terminal.VT.Parse is called in the goroutine started in shell.Terminal.Start. stdout is read when terminal.VT.Parse is called but terminal.VT is in another repository:
https://github.com/zyedidia/terminal/blob/dcfe0edc/vt_posix.go#L114

[niten94]

Sorry, I have seen another discussion you created about the terminal pane opened when term is run so I was thinking you were asking about it. I think terminal mode can mean something else but were you asking about terminal panes?

[fswarbrick]

I believe I have found what I am looking for. In the "terminal" package, in file vt_posix.go, there is a function (t *VT) Parse(). It's described as:

// Parse blocks on read on pty or io.ReadCloser, then parses sequences until
// buffer empties. State is locked as soon as first rune is read, and unlocked
// when buffer is empty.

In it there is a for loop, where the first statement is c, sz, err := t.br.ReadRune(). It looks like it blocks on ReadRune() until there is some data being written to the pty by the terminal application that was invoked.

Thanks for looking at it!