Dropped widget is not marked as focused on 'selectionChange' after drop

[f1ames]

Are you reporting a feature request or a bug?

Bug

Check if the issue is already reported

Related issue probably: https://dev.ckeditor.com/ticket/14427

Provide detailed reproduction steps (if any)

1. Go to https://sdk.ckeditor.com/samples/captionedimage.html (or any sample with widgets).
2. Paste the following code in the browser dev console (listens to selectionChange event and logs focused widget):

var editor = CKEDITOR.instances.editor1; editor.on( 'selectionChange', function() { console.log( 'focused_widget', editor.widgets.focused ); }, null, null, 9999 );

3. Drag and drop any widget inside editor.

Expected result

After dropping the widget, when selectionChange is fired widget repository contains focused widget. If you look at SDK it even gives such code sample for CKEDITOR.editor.widgets.focused.

Actual result

There is no focused widget in widget repository.

Other details

• Browser: All (except FF)
• OS: All
• CKEditor version: 4.5.0 (before 4.5.0 selectionChange event was not fired on widget drop)
• Installed CKEditor plugins: widget (tested with image2 and embed widgets)

[f1ames]

To give a little more perspective on this issue, it is caused by the fact that dropped/pasted widget initialization is executed on selectionCheck (which is fired right before selectionCheck). While the widget html is already there (but not perceived as a widget yet), the widget instance (based on inserted html) is initiated after so it is not available on selectionChange.

This causes some issues:

• listening on selectionChange and checking editor.widgets.focused will not work for dropping widgets,
• commands are refreshed on selectionChange so while widget is dropped the widget related commands will be refreshed with selection not containing widget thus having invalid state (visible in e.g. balloontoolbar).