Some editor DOM operations stop working correctly after a certain number of lines

[maxbrunsfeld]

Scrollbar

We render a scrollbar by creating a div with a height that reflects the editor's screen line count. Unfortunately DOM nodes' heights seem to be bounded:

Reported by @ungb and @Ben3eeE

Decoration rendering

Absolutely-positioned elements like cursors stop rendering correctly after a certain number of lines. It seems that DOM nodes' top property has a hard upper bound.

/cc @nathansobo @as-cii Any ideas on how to solve this?

[nathansobo]

We could render the scrollbar ourselves but I'm not keen to deal with that.

[maxbrunsfeld]

Yeah, I agree. Maybe we could shrink the scrollbar view and its scrollTop proportionally, in order to keep its scroll position correct. It would distort the size of the scrollbar itself (making it taller than it would otherwise be), but that might not be so bad.

[nathansobo]

Great idea about doing it proportional. That's the way to go.