TextEdit.get_rect_at_line_column returns negative pos even though cursor is in viewable area of the control

[MJacred]

Godot version

3.5.2, 4.1.1

System information

Godot v3.5.2.stable and v4.1.1.stable - Ubuntu 20.04.6 LTS (Focal Fossa) - Vulkan (Forward+) - dedicated NVIDIA GeForce GTX 970 (nvidia; 525.125.06) - Intel(R) Core(TM) i7-10700KF CPU @ 3.80GHz (16 Threads)

Issue description

• What does not work: accurately returning the x and y pixel positions of the active cursor in TextEdit
• What did you expect: return position of cursor while it is inside of the viewable area of the control

Note: as get_pos_at_line_column calls get_rect_at_line_column, it is affected as well.

In Godot 3:
Always incorrect for last column.

In Godot 4:
Always incorrect if the line has only 0 or 1 characters.
And starting with second line when there's exactly 1 character.

Pinging @YuriSizov and @Paulb23, as they worked on the Godot 4 version.

• Add methods to get position from column and line in TextEdit #55102
• Add TextEdit unit tests and multiple fixes. #60438

Steps to reproduce

Read pixel rect/pos of cursor while cursor is in last column of line

Currently, the result in Godot 3.5.2 is:

textedit-bug.webm

Recorded while using get_pos_at_line_column, but MRP uses get_rect_at_line_column

In Godot 4.1.1:

textedit-bug_godot-4.webm

Minimal reproduction project

Godot 3.5.2

textedit-bug.tar.gz

for project migration to Godot 4, change line 24 to l.text = var_to_str(pos). Beware: terrible performance in Godot 4