On 30 oct, 17:48, Shaun <[email protected]> wrote:
> Hi,
>
> I'm looking for a way to support additional sub-environments with
> GWT. By sub-environment, I mean an environment that is similar to an
> existing environment, but requires specific tweaks of it's own that
> don't merit a full user.agent right now.
>
> Two examples that are causing me pain at the moment:
>
> (1) Widget environments like Vista sidebar, Google Desktop, Mac
> Dashboard. While these use the installed browser as their base, they
> all have their own quirks to take account of.
>
> (2) Mobile phone environments, where we end up pegging them all to
> "safari" when in fact they each have their own capabilities.
>
> It seems like dynamic binding would be a good solution here but.
> Unfortunately, I hit problems right now if I try to use dynamic
> binding because I have two choices, neither of which is great:
>
> (1) extend the user.agent property with a new value "ie6gd" say --
> this seems like the right thing to do but it means that I have to
> repeat all of the declarations from all of the ie6-specific modules I
> inherit and hence it's impractical/difficult to maintain.
>
> (2) add an extra permutation axis -- this is an option but it means
> I'll get a lot of permutations I don't need like safari-vista-sidbar,
> killing my compile time.
>
> I'd like to be able to tell GWT to "extend the user.agent property
> with new user agent ie6.gd but base it on the existing ie6 value". An
> alternative based on (2) would be giving a method to say "only these
> permutations make sense" in the manifest file, to avoid compiling
> unneeded code.
>
> What do you think?
GWT 2.0 already has this second option:
http://code.google.com/p/google-web-toolkit/wiki/ConditionalProperties
(see Example 2)
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