[IE9] Text cursor jumps out of source area on resize

[jozsefilles]

We've found the text cursor to jump out of the source-mode textarea after resize. Then the user can enter text underneath the textbox. This affects Internet Explorer 9.

Reproduction steps:

1. Navigate to ​http://ckeditor.com/demo (using Internet Explorer 9)
2. Switch to Source mode
3. Click into the textarea
4. Drag the resize handle in the bottom right corner
5. Text cursor jumps out of the textarea
6. Type some characters
7. New text will appear under the area with different style

I found it to be related to an IE-specific resize workaround in CKEditor. On resize, the textarea is hidden for a moment but focus isn't restored after that.

We've successfully fixed it in our in-house fork.

[Jakub Ś]

Problem can be reproduced from CKEditor 4.0 (works fine in beta) in IE9 only.

[Piotrek Koszuliński]

Thanks! Scheduled for review. If the provided patch is ok, we'll include it in 4.4.1.

[Piotrek Koszuliński]

Merged to master with ​git:0e78956.

Thanks for the patch! It works, although I targeted the fix only for IE9. Other IEs blur editable and other browsers keep focus in editable when resizing, so I didn't want to change that behaviour (which is better in both cases). I also checked if the hack affects performance, but I didn't notice any change.