IE9-11 & Edge - setting editor to readOnly and pressing Ctrl+C removes selection.

[jswiderski]

Type of report

Bug

Provide detailed reproduction steps (if any)

1. Open this codePen and run it in IE9-11 or Edge browser
2. Select any part of text and press Ctrl+C

Expected result

It is possible to copy text.

Actual result

Selection dissapears.

Edge does that gracefully and throws:
https://docs.ckeditor.com/ckeditor4/latest/guide/dev_errors.html#range-startcontainer
https://docs.ckeditor.com/ckeditor4/latest/guide/dev_errors.html#range-endcontainer
https://docs.ckeditor.com/ckeditor4/latest/guide/dev_errors.html#selection-fake-reset

IE throws Unspecified error selection.js in line 2202. Code throwing error is sel.addRange( nativeRange );

Other details

Please note this is the same ticket as #1916 I have decided to report a new one because it also has more visual impact on Edge.

[mlewand]

@jswiderski could you check if it's also a regression from 4.7.0?

@Comandeer could you investigate what's causing the issue?

[jswiderski]

@mlewand I must have removed bottom of template by mistake. Yes, problem can be reproduced from CKE 4.7.0 in IE9-11 and Edge.

[Comandeer]

Isn't it a duplicate of #1184? We have already PR for it #1692 – however it only eliminates thrown error, disabling key handling at the same time as a unintentional side effect.

[mlewand]

Duplicate of #1916 and is already fixed on #1692.

[mlewand]

A fix for this issue is ready and has been merged to our upcoming release. It will be available in 4.10.1.

However you can already see it on CKEditor preview builds.

I have forked the original codepen so that it uses preview CKE4 build here: https://codepen.io/mlewand/pen/rroRGQ