[konsole] [Bug 464125] New: Support changing cursor blink with DECSET/DECRST 12

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=464125

            Bug ID: 464125
           Summary: Support changing cursor blink with DECSET/DECRST 12
    Classification: Applications
           Product: konsole
           Version: 22.12.1
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: wishlist
          Priority: NOR
         Component: emulation
          Assignee: konsole-devel at kde.org
          Reporter: magiblot at hotmail.com
  Target Milestone: ---

Konsole supports changing the cursor shape and blinking through the DECSCUSR
escape sequences.

However, Ncurses applications that rely on the `curs_set` function to change
the cursor appearance do not use these sequences but DECSET/DECRST 12 instead,
which Konsole currently ignores.

According to https://invisible-island.net/xterm/ctlseqs/ctlseqs.html:

> CSI ? Pm h
>         DEC Private Mode Set (DECSET).
>           Ps = 1 2  ⇒  Start blinking cursor (AT&T 610).

Therefore, supporting these sequences would allow Ncurses applications to
enable cursor blinking in Konsole.

Thank you very much.

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