[Greasemonkey] Switching to Webpage Context

[Nikolas Coukouma]

Vincent Chute wrote:
> I tried using unsafeWindow but I didn't manage to get it working 
> successfully and whilst I could probably get 
> document.createElement("script"); to work I don't fancy the pain of 
> maintaining nearly 200 lines of sc.innerHTML += "...." especially with 
> the effective loss syntax highlighting.
>
> Are there any techniques that I am missing?
> Anyone else interested in this ability?
Assuming you actually need to do this ...

I think injecting as a script element is the only way to ensure proper 
scope stripping. Eval-ing in a window context would also work, I 
believe, but would be harder to maintain.

I think you should write the script you want to inject in a separate 
file and then convert it to a data URL for easy injection and 
maintenance. Ian Hixie has written an excellent tool for this:
http://software.hixie.ch/utilities/cgi/data/data

I recommend base64 encoding for binary data (e.g. images) because it is 
much more efficient (33% smaller, IIRC). Scripts are mostly text, so I 
think you'll probably be better off with regular URI encoding.

Cheers,
-Nikolas