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pluginy Firefox
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47215.xpi
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components
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sharedObject.js
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2009-11-22
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/*
SHARES OBJECTS BETWEEN WINDOWS OF THE SAME BROWSER INSTANCE FOR N ADD-ONS
Roberto bouzout (tito) <extensiondevelopment@gmail.com>
*/
/*https://developer.mozilla.org/en/How_to_Build_an_XPCOM_Component_in_Javascript*/
/***********************************************************
constants
***********************************************************/
// reference to the interface defined in nsISharedObject.idl
const nsISharedObject = Components.interfaces.nsISharedObject;
// reference to the required base interface that all components must support
const nsISupports = Components.interfaces.nsISupports;
// UUID uniquely identifying our component
// You can get from: http://kruithof.xs4all.nl/uuid/uuidgen here
const CLASS_ID = Components.ID("{205bf060-c5f1-11de-8a39-0800200c9a66}");
// description
const CLASS_NAME = "Shares objects of N add-ons between windows of the same browser instance";
// textual unique identifier
const CONTRACT_ID = "@particle.universe.tito/SharedObject;1";
/***********************************************************
class definition
***********************************************************/
//class constructor
function SharedObject() {
// If you only need to access your component from Javascript, uncomment the following line:
this.wrappedJSObject = this;
}
// class definition
SharedObject.prototype =
{
//our array that will store the shared variables
s : [],
//appends a var to the array 's' (store)
sharedObjectSet: function(aName,aValue)
{
this.s[aName] = aValue;
},
//gets a var from the array 's' (store)
sharedObjectGet: function(aName)
{
return this.s[aName];
},
//sets to null the array in the position aName
sharedObjectDestroy: function(aName)
{
/*
CAUTION THIS WILL DESTROY THE OBJECT INSIDE THE XPCOM COMPONENT
BUT THE REFERENCE (if any) ON YOUR EXTENSION WILL REMAIN INTACT
*/
this.s[aName] = null;
delete(this.s[aName]);
},
//returns true if the object aName exists in 's' (store)
sharedObjectExists: function(aName)
{
if(!this.s[aName])
return false;
else
return true;
},
QueryInterface: function(aIID)
{
if (!aIID.equals(nsISharedObject) &&
!aIID.equals(nsISupports))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
}
};
/***********************************************************
class factory
This object is a member of the global-scope Components.classes.
It is keyed off of the contract ID. Eg:
mySharedObject = Components.classes["@dietrich.ganx4.com/SharedObject;1"].
createInstance(Components.interfaces.nsISharedObject);
***********************************************************/
var SharedObjectFactory = {
createInstance: function (aOuter, aIID)
{
if (aOuter != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
return (new SharedObject()).QueryInterface(aIID);
}
};
/***********************************************************
module definition (xpcom registration)
***********************************************************/
var SharedObjectModule = {
registerSelf: function(aCompMgr, aFileSpec, aLocation, aType)
{
aCompMgr = aCompMgr.
QueryInterface(Components.interfaces.nsIComponentRegistrar);
aCompMgr.registerFactoryLocation(CLASS_ID, CLASS_NAME,
CONTRACT_ID, aFileSpec, aLocation, aType);
},
unregisterSelf: function(aCompMgr, aLocation, aType)
{
aCompMgr = aCompMgr.
QueryInterface(Components.interfaces.nsIComponentRegistrar);
aCompMgr.unregisterFactoryLocation(CLASS_ID, aLocation);
},
getClassObject: function(aCompMgr, aCID, aIID)
{
if (!aIID.equals(Components.interfaces.nsIFactory))
throw Components.results.NS_ERROR_NOT_IMPLEMENTED;
if (aCID.equals(CLASS_ID))
return SharedObjectFactory;
throw Components.results.NS_ERROR_NO_INTERFACE;
},
canUnload: function(aCompMgr) { return true; }
};
/***********************************************************
module initialization
When the application registers the component, this function
is called.
***********************************************************/
function NSGetModule(aCompMgr, aFileSpec) { return SharedObjectModule; }