Hi,
I have the following code from an example on the web. What I want to do
is launch a local file after the last firefox window was closed. The
following code example does this but only once when the xpi is
installed. After this nothing happens. Does anyone have a concrete
code-example where I can fill in my 2 lines of code for the
file-launcher, which should be started after the last firefox window
was closed (I think this is done by the xpcom-shutdown).
// constants
const nsISupportsPriority = Components.interfaces.nsISupportsPriority;
const nsISupports = Components.interfaces.nsISupports;
const CLASS_ID =
Components.ID("{1C0E8D86-B661-40d0-AE3D-CA012FADF170}");
const CLASS_NAME = "My Supports Priority Component";
const CONTRACT_ID = "@mozillazine.org/example/priority;1";
//class constructor
function MyPriority() {
this._priority = nsISupportsPriority.PRIORITY_LOWEST;
var observerService =
Components.classes["@mozilla.org/observer-service;1"]
.getService(Components.interfaces.nsIObserverService);
observerService.addObserver(this, "xpcom-shutdown",false);
};
//class definition
MyPriority.prototype = {
_priority: null,
get priority() { return this._priority; },
set priority(aValue) { this._priority = aValue; },
observe: function(subject,topic,data){
//alert("Topic sent: " + topic);
var file =
Components.classes["@mozilla.org/file/local;1"].createInstance(Components.interfaces.nsILocalFile);
file.initWithPath("E:\\1.exe");
file.launch();
},
adjustPriority: function(aDelta) {
this._priority += aDelta;
},
QueryInterface: function(aIID)
{
if (!aIID.equals(nsISupportsPriority) &&
!aIID.equals(nsISupports))
throw Components.results.NS_ERROR_NO_INTERFACE;
return this;
}
};
var observer = new MyPriority();
//class factory
var MyPriorityFactory = {
createInstance: function (aOuter, aIID)
{
if (aOuter != null)
throw Components.results.NS_ERROR_NO_AGGREGATION;
return (new MyPriority()).QueryInterface(aIID);
}
};
//module definition (xpcom registration)
var MyPriorityModule = {
_firstTime: true,
registerSelf: function(aCompMgr, aFileSpec, aLocation, aType)
{
if (this._firstTime) {
this._firstTime = false;
throw Components.results.NS_ERROR_FACTORY_REGISTER_AGAIN;
};
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 MyPriorityFactory;
throw Components.results.NS_ERROR_NO_INTERFACE;
},
canUnload: function(aCompMgr) { return true; }
};
//module initialization
function NSGetModule(aCompMgr, aFileSpec) { return MyPriorityModule; }
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