Re: [NetHack/NetHack] Prompts can overwrite copyright notice on the

starting screen (Issue #783)

On 2022-06-01 12:22 p.m., NetSysFire wrote:
> Steps to reproduce:
>
>1. Get any prompt and answer it. In my case it was a horribly old
>   save I forgot about or when I wiztested something and forgot
>   about that save, too.
>2. See that the copyright information got overwritten by the prompt:
>
>There is already a game in progress under your name. Destroy old game? [yn] (n)
>         By Stichting Mathematisch Centrum and M. Stephenson.
>         Version 3.7.0-59 Unix Work-in-progress, built May 31 2022 12:28:31.
>         See license for details.
>
>
> Shall I pick character's race, role, gender and alignment for you? [ynaq]
>
> Expected behavior:
>
> Redraw after a prompt was answered, so the prompt vanishes and the
> entirety of the starting screen will be shown.
>
> NetHack, Copyright 1985-2022
>          By Stichting Mathematisch Centrum and M. Stephenson.
>          Version 3.7.0-59 Unix Work-in-progress, built May 31 2022 12:28:31.
>          See license for details.
>
>
> Shall I pick character's race, role, gender and alignment for you? [ynaq]
>
> Proposed severity: low. Not gamebreaking, it is cosmetic only and does
> not have any other consequences.
>

The Copyright notice is placed by tty internal routines writing onto
the BASE_WINDOW fairly early in the startup sequence.

The prompt to "Destroy old game? [yn] (n)" is using the in-game
routine to write to the message window at the top of the screen and
prompt there, just like in-game prompts and messages.

If the player answered 'y' to that, the prompt for
"Shall I pick character's race, role, gender and alignment..."
appeared immediately after. That one, however, is written using
the BASE_WINDOW routines in tty, like the copyright notice.

This change does the following:

It moves the copyright lines down a little bit leaving room for the
"Destroy.." prompts.

It places the "Shall I pick characters's..." prompt further down the
screen by default, leaving some room for about 3 raw_print startup
messages after the copyright notice, just in case there are any.
The "Shall I pick character's..." prompt will still appear immediately
if there is a prompt such as "Destroy old game?..."

There were a couple of other issues around raw_print startup messages
too. Those are delivered using a raw_print mechanism to ensure they
are written even if the window-port is not fully operational. However,
they were only on the screen for the blink of an eye. This call
sequence in restore.c made them disappear almost immediately:
     docrt() -> cls()

Put in a mechanism to detect the presence of raw_print messages
from the early startup, and if there were some, wait for a
keypress before obliterating the unread notifications.

include/decl.h

@@ -101,6 +101,7 @@ struct sinfo {
     int in_self_recover;
     int in_parseoptions;        /* in parseoptions */
     int config_error_ready;     /* config_error_add is ready, available */
+    int beyond_savefile_load;   /* set when past savefile loading */
 #ifdef PANICLOG
     int in_paniclog;
 #endif
@@ -1262,6 +1263,8 @@ struct instance_globals {
 
     /* per-level glyph mapping flags */
     long glyphmap_perlevel_flags;
+    int early_raw_messages;   /* if raw_prints occurred early prior
+                                 to g.beyond_savefile_load */
 
     unsigned long magic; /* validate that structure layout is preserved */
 };