I'd like to capture text from a website .... they have disabled copy-paste, printing and viewing the source.
Assuming the use to be personal and legal, your only practicalone practical choice is to capture it on a smart phone camera. That applies to anything you can see (read).
This applies on any such device where (for whatever reason) copy / paste is not available. I have done this for BIOS and like screens.
If you are doing this on Windows 10, WinKey + Shift + S is good at getting screen copies and might works as well.