Utilizing a c++ xpcom component in conjunction with a javascript xpcom component

After developing an XPCOM component using C++ with a GetHWND() method, I am now working on another XPCOM component using JavaScript. My goal is to utilize the GetHWND function from my C++ component in the JavaScript XPCOM component. Here is the code snippet that I currently have:

netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");

netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");

var myComponent = Components.classes['@dougt/WebLock'].createInstance(Components.interfaces.IWebLock);

myComponent = myComponent.QueryInterface(Components.interfaces.IWebLock);

var res = myComponent.GetHWND(mainWindow.content.document);

However, I am encountering an error stating: "ReferenceError: netscape is not defined". Despite conducting a thorough Google search, I was unable to find a solution to this issue.

I am specifically using Mozilla Firefox and would greatly appreciate any assistance in resolving this problem.

Thank you in advance for your help.

javascriptc++xpcom

Answer №1

You can proceed without:

netscape.security.PrivilegeManager.enablePrivilege("UniversalBrowserRead");
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");

Answer №2

I completely agree with Nickolay's point about the privileges granted to extension code when executed, allowing access to the XPCOM layer and components.

It would be interesting to test whether removing the lines mentioned by Nikolay will affect functionality. Additionally, defining the interface of the C++ component is crucial. XPIDL does not support the HWND type, so an alternative type must be provided or a native type can be used, though not supported by [scriptable] interfaces.

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