Normal screen scrolling non-functional in non-display mode

[blakemcbride]

If I bring up teco-64 in non-display mode with a large existing file e.g. teco-64 myfile.txt and then execute 100v`` the display wraps on the last line leaving teco-64 unusable. However, if I start with teco-64 -d myfile.txt it works as expected.

Although teco-64 starts by default in non-video mode, it appears to be enabling some aspect of video mode that prevents normal non-video screen scrolling from working.

[LdBeth]

well, could you provide a file that can reproduce the problem, and the libncurses version on your system?

[blakemcbride]

Hi.

Any large file (10K+ characters) will do. I am using libncurses version 6.4.

Thanks!

Blake

[LdBeth]

It seems the problem description is confusing me a bit. teco64 -D file starts with display mode, and -1W would do the same thing. I did find 100v a large file in display mode could mess up the ncurses display, but without display mode everything works fine to me using a terminal emulator.

[blakemcbride]

If you just run it exactly as I describe in my initial report, you'll see.

[blakemcbride]

Were you able to reproduce the issue following my original description?

[LdBeth]

I cannot notice anything messes up display, even when opens a binary executable and 100v, so I suppose it might be specific to the terminal emulator you use.

[blakemcbride]

Okay. I will provide a detailed example ASAP. Thanks for the help!!

[blakemcbride]

Hi.

You can get the file I am working with at: https://blakemcbride.us/files/file.txt

The following works as expected:

teco-64 -d file.txt
100v``
ex``

The following has a display line problem on the last line:

teco-64 file.txt
100v``

Thanks!

[LdBeth]

I think you might have changed the configuration so your default is start with ncurses, where I did notice such thing as a display problem, and -d disables ncurses which is the "normal" text only output mode. Anyway, I'll start debugging and see if I can fix that.

[LdBeth]

While I'm still figuring the ncurse thing out, I did find a workaround to clear the mess when you accidentally cause TECO-64 to type too much to the display:

^U (Ctrl u) which would clear up the prompt, and W-1W`` to restart display mode.