How to add a note in a webview?

[hello_mg]

I would like to implement a function like adding a note of a selected text on webview as iBooks and Amazon Kindle does.

I know in webkit we can set CSS property "webkit-user-select" to 'text' or 'auto' to enable user select. But in that case, only the 'copy' button is available. I want to have more options like 'note' or 'define'.it may be too complicated if I have to handle all the touch events from scratch, because anyway the "text select" functionality is already there, I only want to extend a few more options.

Thanks for any clue or samples.

[hello_mg]

upup, hope somebody have some ideas.