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OSC 8 detection / support

From Rob Swindell@1:103/705 to GitLab issue in main/sbbs on Thu Feb 13 18:13:44 2025

open https://gitlab.synchro.net/main/sbbs/-/issues/872

Clickable URIs/links in terminals is a standardized thing: https://github.com/Alhadis/OSC8-Adoption

Detect that support (e.g. using ANSI cursor position request) and set a console flag for the session. Then allow custom strings when supported or use @-codes to do the special expansion when displaying URLs.
--- SBBSecho 3.23-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

From Rob Swindell@1:103/705 to GitLab note in main/sbbs on Mon Mar 31 16:21:36 2025

https://gitlab.synchro.net/main/sbbs/-/issues/872#note_6959

So in the example, `printf '\033]8;;http://example.com\033\\This is a link\033]8;;\033\\\n'`, a non-broken but non-supporting terminal would just eat the URL and only display "This is a link"?
--- SBBSecho 3.24-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

From Deucе@1:103/705 to GitLab note in main/sbbs on Mon Mar 31 18:46:28 2025

https://gitlab.synchro.net/main/sbbs/-/issues/872#note_6960

Right, there's two OSCs there... "\\033\]8;;http://example.com\\033\\\\" and "\\033\]8;;\\033\\\\". Those would be stripped.
--- SBBSecho 3.24-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

From Deucе@1:103/705 to GitLab note in main/sbbs on Mon Mar 31 18:48:37 2025

https://gitlab.synchro.net/main/sbbs/-/issues/872#note_6960

Right, there's two OSCs there... "\\033\]8;;[http://example.com\033\\](http://example.com%5C%5C033%5C%5C%5C%5C)" and "\\033\]8;;\\033\\\\". Those would be stripped.
--- SBBSecho 3.24-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

From Deucе@1:103/705 to GitLab note in main/sbbs on Mon Mar 31 18:48:56 2025

https://gitlab.synchro.net/main/sbbs/-/issues/872#note_6960

Right, there's two OSCs there... "\\033\]8;;http://example.com\033\\" and "\\033\]8;;\\033\\\\". Those would be stripped.
--- SBBSecho 3.24-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

From Rob Swindell@1:103/705 to GitLab note in main/sbbs on Mon Mar 31 20:07:43 2025

https://gitlab.synchro.net/main/sbbs/-/issues/872#note_6964

Well, that's kind of lame. :-( I was hoping the URL would at least be *displayed* for terminals that don't support OSC 8. And that would've made autodetection easy too.
--- SBBSecho 3.24-Linux
* Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

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