BAsh wrote:
What I understand: I can simply get this class to implement the
interface of nsIXPCScriptable.
You want its classinfo to do that. And it already does. See
nsHTMLAppletElementSH and see nsHTMLExternalObjSH::GetProperty. You might want
to implement nsHTMLAppletElementSH::GetProperty if you want to expose this for
<applet> but not Java <object>s.
PRBool getProperty ( nsIXPConnectWrappedNative wrapper , JSContextPtr*
cx , JSObjectPtr* obj , JSVal id , JSValPtr* vp )
The documentation is practically nonexistent so i think wrapper is the
wrapped nsHTMLAppletElement - the class I am a part of. cx is the
JSContext. obj is another pointer to our class. id is the property that
we are looking for, as a string. While vp is where I return a jsval.
|wrapper| is the wrapper in question, and |obj| is the JSObject that the
property get is being done on. The JSObject of |wrapper| could be on the
prototype chain of |obj| -- it need not be |obj| itself.
|id| could be a number, not a string. But other than those minor nits, your
analysis is spot-on.
Under that assumption: I check id to see if it equals "getApplet" or
similar. If not I return NS_OK. If so I get the jobject, wrap it with
liveconnect, convert it to jsval and store it in vp. I then return
NS_SUCCESS_I_DID_SOMETHING.
Yep. Sounds about right.
For all the other methods that come with the interface I return
NS_ERROR_NOT_IMPLEMENTED and let xpconnect handle it - functioning just
like it did before.
Actually, I think you just return NS_OK or call you superclass GetProperty
method. If you return NS_ERROR_NOT_IMPLEMENTED XPConnect will bail on the
property get altogether.
Why can't they simply create a new class/interface that simply lets you
stick a JSObject into javascript.
Because it's never really been needed before?
Would it be possible to make such a class so people don't stumble upon the same
problem?
It'd be possible to write XPConnect glue code for this, for sure.
-Boris
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