show_instrument() problems

[riwa73]

I ran into two issues in the show_instrument() functionality of macstasscript (version "0.0.55").

1. Windows 10
   show_instrument() only works if one hacks the call: to mcdisplay-webgl i.e without path and " " (see below)
   It fails otherwise. I think it is somehow caused by jupyter lab running in the dedicated mcstas-shell

if is_notebook and executable == "mcdisplay-webgl" and not new_tab:
            options += "--nobrowse "

        full_command = ('"' + bin_path + executable + '" '
                        + dir_control
                        + options
                        + instr_path
                        + " " + parameter_string)
      
        new_full_command = (executable + ' '
                        + dir_control
                        + options
                        + instr_path
                        + " " + parameter_string)
       

        process = subprocess.run(new_full_command, shell=True,
                                 stdout=subprocess.PIPE,
                                 stderr=subprocess.PIPE,
                                 universal_newlines=True,
                                 cwd=self.input_path)

2. Windows and MacOs:
   I get only the (empty) output in the notebook cell:
   

   new_tab=True opens a new browser tab and works as intended
   IFrame() seems to find the html but not the js files

[riwa73]

A short update/remark -
on

• Ubuntu 22.04, Firefox
• MacOS M1 - Safari
  the problem does not appear. The instrument visualisation can be opened in the notebook cell.

The issue seems to be caused by the implementaion of the "Blocking Cross Origin" policy (CORS)
in certain browsers in certain operating systems.
It is triggered when Jupyter is trying to open an local html file that again loads some javascript files.
Interestingly opening the same html in a new tab succeeds.