On May 27, 2009, at 8:34 AM, Jack Wootton wrote:
I'm using JSObjectSetProperty.
[...]
I successfully have the execution context to use, the window
JSObjectRef, property name, attributes and use NULL for exception (all
these parameters make sense to me). However I'm unsure about the
purpose of the parameter 'JSValueRef value'.
This function is used to set the property of a particular JavaScript
object. To do this in JavaScript the syntax is:
object.propertyName = value;
The value is the new value to be stored in the JavaScript property.
(note I was
unable to use kJSClassDefinitionEmpty because of compile errors about
a missing symbol '_kJSClassDefinitionEmpty')
What platform? Did you file a bug about this?
JSClassDefinition globalObjectClassDefinition = { 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
globalObjectClassDefinition.version = 1;
char myword[] = {'f', 'o', 'o', '\0' };
globalObjectClassDefinition.className = myword;
Question 1. What is the class name? The documentation describes it
as "A null-terminated UTF8 string containing the class's name.".
However it does not mention what it's for, or what it represents
within the program. Is anyone able to elaborate please? Does it
represent a C class I've al;ready created, that I must describe by
using the JSClassDefinition?
The class name is used for debugging purposes and for the default
behavior of the toString function. If your name is "foo" then toString
will yield "[object foo]".
Question 2. I am unclear as to the purpose of the JSClassDefinition.
Does it represent a C class or a JavaScript class? Are the callbacks
to C / C++ functions?
JSClassDefinition can be used to make a JSClassRef. A JSClassRef can
be used to construct JavaScript objects with behavior that is
implemented with C functions.
-- Darin
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