However, in some situations, I need to be able to perform alert,
prompt, ...
If I override nsIPrompt.idl for instance, I can decide whether or not
I must fake the dialog. In case I should not, is there a way to call
the former interface ?
Anyway, I have something that almost works. I created a component with
nsIPromptService CID and "@mozilla.org/embedcomp/prompt-service;1" ID.
Just before registering this component, I get the former prompt service
and store it. If I do so after registration, I get into a stack overflow.
Humm, in fact, it does not work so well ...
I did not realize the registration only occurs once in the extension's
life. So, catching the previous service before registration only works
the first time I run firefox with my extension.
So, accessing the prompt service with:
var legacyService =
Components.classes["@mozilla.org/embedcomp/prompt-service;1"].
getService(Components.interfaces.nsIPromptService)
... does not work because I get my own service object.
>> Anyway, if you want to forward this to the previously registered
>> component, just get it by CID.
I don't really understand "get it by CID". Is it different from what I do ?
Another alternative would be to create a new interface and service as a
clone of nsIPromptService. So that I can call it from my own prompt
service version without the risk of recursion.
The drawback is that the original nsPromptService is written in C++, and
I would like to avoid code that needs to be compiled on several
platforms. So far, I could develop my extension in JS only.
I could rewrite the whole prompt service in JS, but this is a bit of
work and it may lead to compatibility problems with further versions of
firefox. However, this is my best option so far unless someone gives me
a better idea.
Cheers,
/mig
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