Carriage return in output doesn't reset to line start

[gabrielfeo]

When a carriage return is printed to cell output,

• expected: print position reset to line start
• current: it seems to reset only some N characters back (best described with a picture below)

With the Python kernel, carriage return works as expected. The use case is to print progress to cell output during a long-running operation.

jupyter                  1.0.0
jupyter_client           8.2.0
jupyter-console          6.6.3
jupyter_core             5.3.0
jupyter-events           0.6.3
jupyter-lsp              2.1.0
jupyter_server           2.5.0
jupyter_server_fileid    0.9.0
jupyter_server_terminals 0.4.4
jupyter_server_ydoc      0.8.0
jupyter-ydoc             0.2.4
jupyterlab               4.0.0
jupyterlab-pygments      0.2.2
jupyterlab_server        2.22.1
jupyterlab-widgets       3.0.7
kotlin-jupyter-kernel    0.11.0.385
nbconvert                7.4.0

[ileasile]

Looks like it's related to the logic of CapturingOutputStream. It flushes the buffer i.e. if some time limit is reached.

In this particular case, increasing output buffer size helps:

%output --max-buffer=10000000

[ileasile]

https://github.com/Kotlin/kotlin-jupyter/blob/master/docs/magics.md

[gabrielfeo]

Thanks. It does make it reset to line start, but it seems to print out of order and/or lose prints after a certain number of them:

[ileasile]

So maybe max-time option should be also added
%output --max-buffer=10000000 --max-time=100000

[ileasile]

%output --max-buffer=100000000 --max-cell-size=100000000
But I think I'll adjust the behavior of \r itself