On Wednesday, October 16, 2013 1:53:24 PM UTC+5:30, Bobby Holley wrote:
> As you've discovered, there's a lot of magic and boilerpate that's
>
> easy to get wrong. You can find some simple test XPCOM components in
>
> js/xpconnect/components. Try grabbing one of those, making sure that
>
> it works, and then iterating on it to turn it into what you need.
>
>
>
> bholley
>
>
>
> On Wed, Oct 16, 2013 at 10:16 AM, Vasu Yadav <[email protected]>
> wrote:
>
> > On Friday, October 4, 2013 6:16:36 PM UTC+5:30, Bobby Holley wrote:
>
> >> On Fri, Oct 4, 2013 at 2:36 PM, <[email protected]> wrote:
>
> >>
>
> >>
>
> >>
>
> >> > Based on my understanding, I need to create a JS XPCOM component apart
>
> >>
>
> >> > from the existing C++ XPCOM component I already have. All the JavaScript
>
> >>
>
> >> > function calls need to be made from JS XPCOM component.
>
> >>
>
> >> >
>
> >>
>
> >>
>
> >>
>
> >> Precisely.
>
> >>
>
> >>
>
> >>
>
> >>
>
> >>
>
> >> > How will the C++ XPCOM and JS XPCOM communicate to each other? Can we
>
> >>
>
> >> > instantiate JS XPCOM component from C++ XPCOM Component?
>
> >>
>
> >> >
>
> >>
>
> >>
>
> >>
>
> >> Yes. The great the about XPCOM components is that they can be instantiated
>
> >>
>
> >> and manipulated in either C++ or JS - the language of the implementation
>
> >>
>
> >> doesn't matter.
>
> >>
>
> >>
>
> >>
>
> >> >
>
> >>
>
> >> > I want to deliver only one .xpi to my customers. I hope it is possible to
>
> >>
>
> >> > package both C++ XPCOM and JS XPCOM components in the same .xpi file.
>
> >>
>
> >> > Please let me know if this is possible and whether you see any problems
> >> > in
>
> >>
>
> >> > this approach.
>
> >>
>
> >> >
>
> >>
>
> >>
>
> >>
>
> >> Yep, that should work just fine.
>
> >>
>
> >>
>
> >>
>
> >> Here are some links that might be useful:
>
> >>
>
> >>
>
> >>
>
> >> https://developer.mozilla.org/en/docs/How_to_Build_an_XPCOM_Component_in_Javascript
>
> >>
>
> >> http://kb.mozillazine.org/Implementing_XPCOM_components_in_JavaScript
>
> >>
>
> >>
>
> >>
>
> >> bholley
>
> >
>
> > Sorry for troubling you again.
>
> >
>
> > I am trying to create one sample JavaScript XPCOM component.But not able to
> > instantiate JavaScript XPCOM component from C++ code.
>
> >
>
> > Steps to create JavaScript XPCOM component-
>
> > 1) Create nsIHelloWorld.idl file for nsIHelloWorld interface.
>
> > 2) Create nsIHelloWorld.js file
>
> > 3) Generating .xpt and header file using Python22.0.
>
> > 4) Instantiate JavaScript XPCOM component from C++ code.
>
> >
>
> > Code-
>
> > nsIHelloWorld.idl
>
> > ----------------------------------------------------------
>
> > #include "nsISupports.idl"
>
> > [scriptable, uuid(8e001740-322b-11e3-aa6e-0800200c9a66)]
>
> > interface nsIHelloWorld : nsISupports
>
> > {
>
> > string Hellovasu();
>
> > };
>
> > ----------------------------------------------------------
>
> >
>
> > nsIHelloWorld.js
>
> > -----------------------------------------------------------------------------------------------------
>
> > Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
>
> > function HelloWorld()
>
> > {
>
> > }
>
> > HelloWorld.prototype = {
>
> > classDescription: "My Hello World Javascript XPCOM Component",
>
> > classID: Components.ID("{031572f4-3629-11e3-98fd-ce3f5508acd9}"),
>
> > contractID: "@keynote.com/firefox/helloworld;1",
>
> > QueryInterface:
> > XPCOMUtils.generateQI([Components.interfaces.nsIHelloWorld]),
>
> >
>
> > Hellovasu: function() {
>
> > return "Hello World!";
>
> > }
>
> > };
>
> > var components = [HelloWorld];
>
> > if (XPCOMUtils.generateNSGetFactory)
>
> > this.NSGetFactory = XPCOMUtils.generateNSGetFactory([components]); //
> > Firefox 4.0 and higher
>
> > else
>
> > var NSGetModule = XPCOMUtils.generateNSGetModule([components]); //
> > Firefox 3.x
>
> > ----------------------------------------------------------------------------------------------------
>
> >
>
> > chrome.manifest
>
> > ----------------------------------------------------------------------------------
>
> > interfaces components/nsIHelloWorld.xpt
>
> > component 031572f4-3629-11e3-98fd-ce3f5508acd9 nsIHelloWorld.js
>
> > contract @keynote.com/firefox/helloworld;1
> > {031572f4-3629-11e3-98fd-ce3f5508acd9}
> > application={ec8030f7-c20a-464f-9b0e-13a3a9e97384}
>
> > -----------------------------------------------------------------------------------
>
> >
>
> > Instantiate JavaScript XPCOM compnent from C++ code
>
> > -----------------------------------------------------------------------------------------------
>
> > #include "nsComponentManagerUtils.h"
>
> > #include "nsIHelloWorld.h"
>
> >
>
> > nsCOMPtr<nsISupports> iSupports =
> > do_CreateInstance("@keynote.com/Firefox/helloworld;1",&rv1);
>
> > or
>
> > nsCOMPtr<nsIHelloWorld> ihello =
> > do_CreateInstance("@keynote.com/Firefox/helloworld;1",&rv1);
>
> >
>
> > Not able to instantiate helloworld component.
>
> > -----------------------------------------------------------------------------------------------
>
> > Logs value for IHello and rv1 in hexa formet- IHello=0 rv1=80040154
>
> >
>
> > Do you fell anything missing or wrong in this code? If you have any better
> > approach or solution please suggest me. I am completely stuck here.
>
> >
>
> > Regards
>
> > Vasu
>
> >
>
> > _______________________________________________
>
> > dev-platform mailing list
>
> > [email protected]
>
> > https://lists.mozilla.org/listinfo/dev-platform
I truly thankful for your help.
As you suggest I had gone through XPCOM components of js/xpconnect/components.
Now I am able to Instantiate helloword JS-XPCOM component, when I am trying to
return object to nsISupports interface pointer. but not same when directly
tried to return object to nsIHelloWorld interface pointer.
nsCOMPtr<nsISupports> iSupports1 =
do_CreateInstance("@vasu.com/helloworld;1",&rv1);
In that case I m able to instantiate.
nsCOMPtr<nsIHelloWorld> hello =
do_CreateInstance("@vasu.com/firefox/helloworld;1",&rv2);
do_CreateInstance function is always returning null when I try to return
object directly to nsIHelloWorld interface pointer.
Trying to call hello() function of JS-XPCOM from C++XPCOM code. I tried to
confirm Hello() function got call or not? For that reason I added alert and
console log message inside a function of hello(), but none them work.
Can we pass XPCOM Interface pointer(i.e. nsIDOMWindow, nsIDocShell..) from C++
XPCOM component to JavaScript XPCOM component? If yes then how?
Please share some useful post, data regarding communication between C++ XPCOM
component to JavaScript XPCOM component.
Regards
Vasu
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