Overlapping data inside curses applications without any addOn

[shashank-gowda]

I had previously reported an issue #3914 and my issue was duplicated with #3878. I see #3878 fix is merged to Version 5.0

Now, I have upgraded the xterm js libraries to Version 5.0 but I still see the same issue.
FYI... I'm not using add on webgl in my application.

Original Issue: #3914

[jerch]

Your issue looks like either a terminal size issue or TERM issue to me. Plz make sure to correctly update PTY size from resizes. Whats your TERM var?
Also does it work in your standard terminal?

[shashank-gowda]

Below is my Terminal settings. I'm hitting this issue when the window size is MAX.

var term = new Terminal({
cols: 150,
cursorBlink: true,
cursorStyle: "block",
scrollback: 800,
tabStopWidth: 8,
convertEol: true,
fontSize: 16
});

Yes, this works perfectly in the standard terminal.

[jerch]

I'm hitting this issue when the window size is MAX.

So it works correctly w'o a terminal resize? Are you sure that you update the PTY size from terminal resizes?

[shashank-gowda]

Even without resize of terminal it's not working correctly. What do you mean by updating the PTY size for terminal resize?

[jerch]

The PTY maintains a terminal size itself. This gets used for canonical termios mode to do the line wrapping and size propagation to apps (SIGWINCH). Whenever a terminal emulator changes its [cols, rows]-size, the PTY size has to be updated, otherwise the line wrapping/cursor positioning will be wrong with nasty output bugs.

[shashank-gowda]

Could please help me to update the PTY size? How to do that? What calls I need to make?

[jerch]

Well I cannot tell you that, as it depends on your server side integration and how you get a working PTY from the system. node-pty for example exposes a .resize method, where the new terminal size arguments go into. In C/linux it is ioctl(PTY_MASTER_FD, TIOCSWINSZ, &ws);, where ws is a struct winsize containing the new values.

[LIZIMEME]

I'm having a similar problem. The output file directory names overlap.

[jerch]

@LIZIMEME If ls print its tabbed content too far to the right leading to wrapped lines, then your TTY/PTY col size is too big.

Again - this is nothing xterm.js has control of, you have to tell the OS PTY the correct size yourself within your backend binding.