22:31 <WhyNotHugo> Odd, I have a much shorter snippet for that: https://git.sr.ht/~whynothugo/dotfiles/tree/main/item/home/.zshrc#L73-78

22:32 <brocellous> WhyNotHugo: scrolling by LINES-1 will add blanks in teh scrollback for every line below the cursor

22:33 <brocellous> If you want it compact (so that scrolling up by 1 gives you the most recent output line) you have to either print a screen of newlines to get it to scroll just enough, or calculate the scroll based on the cursor position.

22:37 <brocellous> I hit ctrl-l a lot, so inserting nearly a full screen of blanks everytime into the scrollback makes the scrollback a lot less useful.

22:37 <WhyNotHugo> brocellous: Oh, this is so much nicer! I hope you succeed in adding this to the wiki, thanks!

22:37 <brocellous> Until recently, I was using this kludge: https://git.sr.ht/~brocellous/dotfiles/tree/212149ba22aa9f49600ac8d8009a162a34a2d2df/item/.zshrc#L100-112

22:39 <brocellous> it tries to calculate the corretc scroll based on teh cursor position, and tries to consider for multibuffer commands (in addition to multiline buffers)

22:40 <brocellous> unfortunately read/write to the TTY within a zle widget isn't technically supported. In this case I think it will always work, but zle can be gnarly and it is considered a hack.

22:41 <brocellous> zshzle(1) documents that reading from the tty may unintentionally block zle.

22:43 <brocellous> So, last night, I finally came up with a version that does not read from the tty and gives the correct scroll behavior

22:43 <brocellous> behold: https://git.sr.ht/~brocellous/dotfiles/tree/master/item/.local/share/zsh/fn/clear-screen-keep-sb

22:45 <brocellous> I found that without the \e7/\e8 cursor save/restore escapes foot would sometimes draw the cursor in position 1,1 before the prompt was redrawn by zsh so I added them in to avoid that brief flash