Non-editable content duplicated on drag-n-drop

[Dinu]

Test:

• insert <span contenteditable="false">Some<a href="xxx">Link</a>Text</span>
• IE: drag-n-drop of wrapper rectangle works; drag-n-drop selection duplicates content with <a>...</a> stripped (text mode-like)
• Firefox: you can drag just the <a> element; a copy is made with all enclosing tags kept (html duplicate)
• Chrome: worst case: the <a> is duplicated with no enclosing tags

IMO, when drag-and-dropping non-editable blocks, the following should happen:

• the block be moved, not copied, in full
• if such reason exists to duplicate content, it should either be a full copy of the non-editable tag or IE-style sanitized text duplication of fragments. Since the whole idea of having noneditable sections is to allow developer fixed-format fragments to be inserted, any different behavior will break functionality.

[Garry Yao]

Make sense, but not sure we could unify the D&D behavior in all browsers.

[Piotrek Koszuliński]

We fixed this partially in CKEditor 4.3 and the remaining one is #11164. Also, note that widget can have a mask which will cover all its content, preventing from any other bugs to occur. See: ​http://docs.ckeditor.com/#!/api/CKEDITOR.plugins.widget.definition-property-mask