Subj : Replacing a text string to execute JS code directly
To : Nightfox
From : Digital Man
Date : Fri Feb 07 2025 09:26 pm
Re: Replacing a text string to execute JS code directly
By: Nightfox to Digital Man on Fri Feb 07 2025 04:52 pm
> Re: Replacing a text string to execute JS code directly
> By: Digital Man to Nightfox on Wed Jan 29 2025 02:43 pm
>
> DM> Object.defineProperty(js.global, "prop", {
> DM> get : function () {
> DM> return "hello, world";
> DM> }
> DM> });
>
> DM> bbs.replace_text("Pause", "@JS:" + "prop@"); // @-code split for
> DM> posting
>
> I'm following this pattern to replace AreYouThere, and it seems like after
> the get function executes and returns, it seems like something wonky is
> going on with screen refreshing. With DDMsgReader, it seems there is a bit
> of scrolling on the screen and/or something wonky is going on with cursor
> movement via cursor.gotoxy(). Within the get function though, I've used
> cursor.gotoxy() and output a message, that worked as expected.
>
> I tried updating my get function to just return ""; and did a test with
> DDMsgReader. Before the the timeout warning, I had the user account looking
> at the message reading screen in DDMsgReader:
>
>
http://www.digitaldistortionbbs.com:81/synchronet_stuff/reading1.png
>
> I waited for the configured amount of time, and after the get() was called
> for AreYouThere (returning ""), I pressed the down arrow, which should
> scroll the message down one line, and the screen was then as follows:
>
>
http://www.digitaldistortionbbs.com:81/synchronet_stuff/reading_AfterAYT_AD.
> png
>
> If the getter is returning an empty string, I'm not sure what's causing the
> display to become messy. This does not happen if I replace AreYouThere with
> a simple empty string as follows:
>
> bbs.replace_text(AreYouThere, "");
Probably because of this logic in the getkey():
if ((sys_status & SS_USERON) && *text[AreYouThere] != '\0') {
attr(LIGHTGRAY);
carriage_return();
cleartoeol();
restoreline();
}
So you'll probably want to bbs.replaceText(AreYouThere, "") in the getter, so you don't have this carriage-return, CLR-TO-EOL and restore line stuff going on.
--
digital man (rob)
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