I need to expose my component's functions to web document's
javascript. I achieved this in a javascript component, but I need it
in c++ and I don't understand why this code doesn't work
I'll put here all the code I've used. It's a minimal component that
only performs a sum of two numbers, but it's enough to try to
understand how yto expose that function to javascript.
I beg if someone could help me, please.
thanks in advance.
PS: Maybe should I create a C++ component with the functionality and
connect it to the javascript component that can expose its functions,
using it as a wrapper? may this be a good solution or not? I will
appreciate your suggestions.
/************** ImyCom.idl *************/
#include "nsISupports.idl"
[scriptable, uuid(87f3699c-25aa-404b-b750-6b3752c65371)]
interface ImyCom : nsISupports
{
long add(in long a, in long b);
};
/************** myCom.cpp *************/
#include "myCom.h"
NS_IMPL_ISUPPORTS1_CI(myCom, ImyCom)
myCom::myCom()
{
/* member initializers and constructor code */
}
myCom::~myCom()
{
/* destructor code */
}
/* long add (in long a, in long b); */
NS_IMETHODIMP myCom::add(PRInt32 a, PRInt32 b, PRInt32 *_retval)
{
*_retval = a + b;
return NS_OK;
}
/************** myCom.h *************/
#ifndef _MYCOM_H_
#define _MYCOM_H_
#include "ImyCom.h"
#include "nsISupports.h"
#include "nsISupportsImpl.h"
#include "nsIDOMClassInfo.h"
#include "nsDOMCID.h"
#include "nsIScriptNameSpaceManager.h"
#define MYCOM_CONTRACTID "@clauer.uji.es/myCom;1"
#define MYCOM_CLASSNAME "A XPCOM JS exposition sample"
#define MYCOM_CID_STR "abfb30fd-26d3-4332-86e5-dc79fcf7bf25"
#define MYCOM_CID { 0xabfb30fd, 0x26d3, 0x4332, \
{0x86, 0xe5, 0xdc, 0x79, 0xfc, 0xf7, 0xbf, 0x25 } }
/* Header file */
class myCom : public ImyCom
{
public:
NS_DECL_ISUPPORTS
NS_DECL_IMYCOM
myCom();
virtual ~myCom();
};
#endif //_MYCOM_H_
/************** myComModule.cpp *************/
#include "nsIGenericFactory.h"
#include "myCom.h"
NS_GENERIC_FACTORY_CONSTRUCTOR(myCom)
NS_DECL_DOM_CLASSINFO(myCom)
//Or should I use this one? NS_DECL_CLASSINFO(myCom)
NS_DOMCI_EXTENSION(myCom)
static NS_DEFINE_CID(kmyComCID, MYCOM_CID);
NS_DOMCI_EXTENSION_ENTRY_BEGIN(myCom)
NS_DOMCI_EXTENSION_ENTRY_INTERFACE(ImyCom)
NS_DOMCI_EXTENSION_ENTRY_END_NO_PRIMARY_IF(myCom,PR_TRUE,
&kmyComCID)
NS_DOMCI_EXTENSION_END
static NS_METHOD
myComRegister(nsIComponentManager *aCompMgr,
nsIFile *aPath,
const char *registryLocation,
const char *componentType,
const nsModuleComponentInfo *info)
{
nsresult rv = NS_OK;
nsCOMPtr<nsICategoryManager> catman =
do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
nsXPIDLCString previous;
rv = catman->AddCategoryEntry(JAVASCRIPT_DOM_CLASS,
"myCom",
MYCOM_CONTRACTID,
PR_TRUE, PR_TRUE,
getter_Copies(previous));
NS_ENSURE_SUCCESS(rv, rv);
char* iidString = NS_GET_IID(ImyCom).ToString();
if (!iidString)
return NS_ERROR_OUT_OF_MEMORY;
rv = catman->AddCategoryEntry(JAVASCRIPT_DOM_INTERFACE,
"ImyCom",
iidString,
PR_TRUE, PR_TRUE,
getter_Copies(previous));
nsCRT::free(iidString);
NS_ENSURE_SUCCESS(rv, rv);
return rv;
}
static nsModuleComponentInfo components[] =
{
{
MYCOM_CLASSNAME,
MYCOM_CID,
MYCOM_CONTRACTID,
myComConstructor,
myComRegister
}
};
void PR_CALLBACK
myComModuleDestructor(nsIModule* self){
NS_IF_RELEASE(NS_CLASSINFO_NAME(myCom));
}
NS_IMPL_NSGETMODULE_WITH_DTOR("myComModule", components,
myComModuleDestructor)
/************** testmycom.html ************/
<HTML>
<SCRIPT>
function MyComTestGo() {
try {
var obj = new myComFromJS();
var res = obj.add(1,5);
alert(res);
res = obj.cat("hola","quetal");
alert(res);
//var res = myComFromJS.add(1,5);
//alert(res);
}
catch (err) {
alert(err);
return;
}
}
</SCRIPT>
<BODY>
Click to test t2.<br/>
<BUTTON ONCLICK="MyComTestGo();">Go</BUTTON>
</BODY>
</HTML>
This is all of it. I don't know if i forgot some declaration or
implementation that makes it able to expose the functions to
javascript, as long as the Javascript version of the component is
quite different to this one.
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