On May 15, 2009, at 7:35 AM, Jack Wootton wrote:
4. Create the context:
JSGlobalContextRef context = JSGlobalContextCreate(globalObjectClass);
You will only do this if you’re using JavaScript outside of a web
page. If you want to do this in conjunction with WebKit you’ll need to
get the context from WebKit APIs. On Mac OS X the relevant API is -
[WebFrame globalContext].
1. Who should share the context? Is a single context used for a
single webpage / frame?
See my answer above.
2. Where do I define the class that will actually handle the
implementation of any methods on my new object?
I don’t understand the “where” question. Do it wherever makes sense in
your program, and call JSClassCreate. Then when it's time to make an
object, pass the JSClassRef to JSObjectMake.
3. The object has been made using "JSObjectMake", but how is it
added to WebKit?
A common thing to do is to create an object and then put it in a
property of the window object, which is the global object inside the
web browser. That’s done on Mac OS X by implementing the
webView:windowScriptObjectAvailable: method of the frame load
delegate. The window script object is a WebScriptObject, and you can
get the JSObject version of it by calling the JSObject method on it.
Then you can set your object as a property of the window object with
the JSObjectSetProperty function.
-- Darin
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