How to Call Javscript functions (page scripts or content scripts) from JS-XPCOM

[Shanmugham Sundaram]

Hi,

I've to call injected javascript function  in a web page by using JS-XPCOM from 
my C++ XPCOM. Following are the skeleton of my work..

1 - My IDL is as follows
               #include "nsISupports.idl"
               [scriptable, uuid(f22e7808-17a7-11e4-9620-58fc1d5d46b0)]
               interface nsIJSSupport: nsISupports
               {
                 boolean doSomething(in string frameId, in string siteId,in 
bool  bPage, in bool bIsGreater);
               }; 
                           

2 - My JS file is as follows

              Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

               function MyComponent() { }

               MyComponent.prototype = {
                 classDescription: "Shans Javascript XPCOM Component",
                 classID:          
Components.ID("{17ca79ee-17ae-11e4-a5ea-fa011e5d46b0}"),
                 contractID:       "@Shans.com/jssource;1",
                 QueryInterface: 
XPCOMUtils.generateQI([Components.interfaces.nsIJSSupport,Components.interfaces.nsISupports]),
                 
               doSomething: function(frameId,  siteId, bPage, bIsGreater) { 
                                             //Get the proper window and get 
the call to sb_MyComponent 
                                             //assuming the following will call 
the "sb_MyComponent"
                                             
win.wrappedJSObject.injectedFunctioninWebPage(frameId,  siteId, bPage, 
bIsGreater);
                              }
               }

               var components = [MyComponent];
               
               if ("generateNSGetFactory" in XPCOMUtils)
                 var NSGetFactory = 
XPCOMUtils.generateNSGetFactory(components);  
               else
                 var NSGetModule = XPCOMUtils.generateNSGetModule(components);  
                           
                                 
                                 

3 - My C++ XP-COM code (skeleton) to make JS-XPCOM call as below :

               nsresult rv;
               nsCOMPtr<nsIDOMWindow> aDOMWindow( do_GetInterface( 
aWebProgress, &rv ) );
               nsCOMPtr< nsPIDOMWindow > privateWindow( do_QueryInterface( 
aDOMWindow, &rv ) );
               nsCOMPtr< nsIDocShell > docShell = privateWindow->GetDocShell();
                                nsCOMPtr<nsIJSSupport> iJSSupport = 
do_CreateInstance("@Shans.com/jssource;1",&rv);
               if(NS_SUCCEEDED(rv) && iJSSupport)
                 {
                          iJSSupport-> doSomething (frameId,  siteId, bPage, 
bIsGreater)        
                                }


Is it possible to call the "injectedFunctioninWebPage()" by using 
win.wrappedJSObject ? If not, how to call the JS functions  in the page by 
using JS-XPCOM? 


Thanks in Advance,
Shan'


_______________________________________________
dev-platform mailing list
dev-platform@lists.mozilla.org
https://lists.mozilla.org/listinfo/dev-platform