HtmlEditor's word wrap when the word is longer than the line

[migesok]

Hi!
I'm using Ext.form.field.HtmlEditor as my handmade wiki's page editor. It works great except line wrap:
htmleditor.png

So I wonder if there is any way to make the editor break words as they get longer than the line size?
I looked through the source code of the component but don't get how that funky magic with hidden text area and iframe works. So I don't know how to intervene.
Configuration

style: {
    'word-wrap': 'break-word'
}

doesn't work either (fat chance )