half_page_up/half_page_down does not work when combined with align_view_center

[hoel-bagard]

Summary

Binding a key to half_page_up and align_view_center causes the cursor to only moves up by ~5 lines instead of half a page. half_page_down exhibits the same behavior.

Reproduction Steps

I added the following to my config:

C-u = ["half_page_up", "align_view_center"]
C-d = ["half_page_down", "align_view_center"]

I expected to be able to go up/down by half pages while keeping my cursor centered on the page, but instead of half a page, the cursor only moves by ~5 lines.
(This can only be reproduced by opening a somewhat long file)

Probably unrelated, but doing the same changes to the search shortcuts seems to work fine.

n = ["search_next", "align_view_center"]
N = ["search_prev", "align_view_center"]

Platform

Linux

Terminal Emulator

I reproduced the issue on wezterm 20240203-110809-5046fc22 and konsole 23.08.5

Installation Method

pacman

Helix Version

helix 23.10

[pascalkuthe]

half_page_down only moves the viewport not the cursor. The cursor just gets dragged along by scrolloff

[hoel-bagard]

I see, thank you for the answer.
Is there a way to move the cursor by half a page ?

[the-mikedavis]

That was added recently: #8015

page_cursor_half_up / page_cursor_half_down