[platform-ui-dev] Show error messages directly in editor

[Simon Schäfer <mail@xxxxxxxxxxxxxxxxxxx>]

I found the following screenshot on the Internet, it is taken from 
Apples Xcode IDE:

https://developer.apple.com/library/ios/documentation/ToolsLanguages/Conceptual/Xcode_Overview/art/FixItError_2x.png

I'm wondering if the text editors of Eclipse or the underlying 
components of SWT are able to provide the inline error messages one can 
see on the right side of the screenshot.

I have no insight on how the text editors of Eclipse are written 
internally, thus my question is whether they already provide a way to 
add such a feature to them? Or is this more a task like go to the root 
and hack everything?