Visual selection of multiline RTL text seems incorrect

1

If I go to https://codemirror.net/demo/bidi.html and using the mouse, select 1 full line and the first half of the next line, the visual indication of the selection shows that I have selected both lines. However, if I press delete, it will only delete what I actually selected with the mouse.

I tried inspecting the DOM, and could not figure out if the display of the selection is done by CodeMirror. It does not seem that way as I cannot see any spans that align with what is marked.

Does anyone know of a good way of solving this?

2

I’m not seeing whis. Which text are you selecting, exactly, and which browser are you using?

3

I am using Chrome 60 (64bit), but seeing the same thing in IE11 (English Windows 8.1).

I made a screen capture here

https://screenpresso.com/=SFaTf

In that video I select with the mouse the text on line 9 and 40% of the text on line 10 (until the period).
CodeMirror shows the selection as if both lines are fully selected, but when I press delete, only the text that I actually marked with the mouse is deleted (the period is kept)

4

Weird, If I clear the bidi demo and type some all arabic text, it seems to work as it should, but In my local instance setup with the same options (CodeMirror 5.29) I cannot get it to work with any type of text.

5

Could it be related to this fix: https://github.com/codemirror/CodeMirror/commit/044850a01718d92fd61673dde3b08b1b07ccceb6 ?
In the latest released version (5.29.0) I cannot get it to work at all, whereas in the bidi demo which seems to use latest dev build (5.29.1) it works decently.

6

Right, this sounds like it might have been fixed by the patch you linked.