[Feature Request] Language auto detection from simplified session file

[andry81]

Description of the Issue

The feature was removed or broken some time ago:
#5629
#5338

I have used it from Total Commander to open many files at once with out put the paths into a command line (command line length is very limited). Now it does not work.

Version: 7.7.1 x86

Steps to Reproduce the Issue

#5338

Expected Behavior

Auto detect language in case of open many files from a session file.

[andry81]

Bump the issue. Still reproduciable in the 7.8.8 x86.

The issue can be workarounded by sequence of CTRL+W + CTRL+SHIFT+T to reopen a tab and trigger the language detection for the file. But that is annoying because has to be invoked on all tabs.

[andry81]

For those who suffer from the bug you can use python script to reopen all tabs upon Notepad++ launch:

def reopen_all_files():
  print('reopen_all_files:')
  notepad.saveAllFiles()
  all_files = notepad.getFiles()
  notepad.closeAll()

  for f in all_files:
    notepad.open(f[0])
    print("  - {}".format(f[0]))
  print()

The complete version is here:
https://github.com/andry81/contools--notepadplusplus/tree/HEAD/scripts/python/tacklebar/libs/npplib.py

Update:
This workaround has an issues, when you appending files to already opened notepad++ instance and it does not trigger the startup python script.

[andry81]

Another much better solution is to call notepad++ with the -z --open_from_file_list -z <list_file> command line:
https://community.notepad-plus-plus.org/topic/19247/launching-tail-f-from-the-command-line/14
https://npp-user-manual.org/docs/command-prompt/

import shlex
from Npp import notepad
if '--open_from_file_list' in shlex.split(notepad.getCommandLine()):
   ...

This a bit more reliable and faster, because you don't need to write a convertion logic from a custom file paths list into the notepad++ session file. But neverless it suffers from the same issue as previous workaround with files appending into already existed notepad++ instance. The script has invoked only on instance creation and does not on files appending in already existed instance.

Example implementation:
https://github.com/andry81/contools--notepadplusplus/tree/HEAD/scripts/python/tacklebar/libs/npplib.py
https://github.com/andry81/contools--notepadplusplus/tree/HEAD/scripts/python/startup.py