This is a best-effort attempt, as the target offset from the top is just
an estimate; furthermore, this does not account for things like project
search header (which adds a bit of vertical offset by itself and is
removed once we jump into a buffer), but it still should improve the
situation quite a bit.
Fixes: #5296
Release Notes:
- Improved target selection when jumping from multibuffer; final
position in the buffer should more closely match the original position
of the cursor in the multibuffer.
This should have no user-visible impact.
For vim `.` to repeat it's important that actions are replayable.
Currently editor::MoveDown *sometimes* moves the cursor down, and
*sometimes* selects the next completion.
For replay we need to be able to separate the two.
* Scroll to the newest cursor if all cursors can't fit in the viewport.
* Refuse to layout an editor less tall than one line height.
Co-authored-by: Nathan <nathan@zed.dev>
After #2641 we noticed that scrolling didn't take a count parameter.
The PageDown/PageUp logic was also broken by an additional -1 (for both
vim mode and not).