Perhaps this was intentional behavior, but if not, I've attempted to
write this hacky fix — I noticed using the vertical arrow keys to move
past the document start/end would reset the goal_x to either zero (for
moving upwards) or the line width (for moving downwards). This change
makes Zed match most native text fields (at least on macOS) which leave
goal_x unchanged, even when hitting the end of the document.
I tested this change manually. Would be happy to add automatic tests for
it too, but couldn't find any existing cursor movement tests.
Release Notes:
- Behavior when moving vertically past the start or end of a document
now matches native text fields; it no longer resets the selection goal