Thanks.
I post the result of my tests, it could be useful later for somebody else.
It's also more clear when you write things.
It's easy to get the context (this) and use it in JS code called from C++.
Globals data (global scope) are also available.
I worked with "eval" and "compile". The second solution is cleaner, but I
want to see if they act the same way.
Next I need to pass arguments (and not use "this" to pass everything), but
main things are in place. Code is a thing, understanding is another :)
What caused me so many troubles is the lack ok "require", but now I know
why :
- "require" is available in "this" context in REPL, but it's specific to
REPL, then I can't expect use "this.require" everywhere. The use of REPL to
diagnose was a trap !!!
- "require" is available in local scope in startup files, in local scope of
modules, ... but it's not in global scope. As I don't get local scope,
"require" is not available in my JS code called from C++ by default. I need
to "pass it".
*C++ Addon*
Handle<Value> UseRequire_A(const Arguments &args) {
HandleScope scope;
char *script_code = "require('os').hostname() + var_A + global_stuff;";
Local<Function> eval = Local<Function>::Cast(
Context::GetCurrent()->Global()->Get(String::New("eval")) );
Local<Value> arguments[1] = { String::New(script_code) };
Local<Value> result = eval->Call(Context::GetCurrent()->Global(), 1,
arguments);
return scope.Close(result);
}
Handle<Value> UseRequire_B(const Arguments &args) {
HandleScope scope;
char *script_code = "require('os').platform() + var_B + global_stuff;";
Local<v8::Script> script =
v8::Script::Compile(String::New(script_code), String::New("internal.js"));
Local<Value> result = script->Run();
return scope.Close(result);
}
*Javascript *
// "require" is JS code called from C++ , we need to associated
// it explicitely with the context (this)
// Fail !
//this.require = require;
//this.var_A = " - Content for A";
//this.var_B = " - Content for B";
//var var_A = " - Content for A";
//var var_B = " - Content for B";
// OK
(function() {
this.require = require;
this.var_A = " - Content for A";
this.var_B = " - Content for B";
})();
// No - it will be local
var global_stuff = " - Global DATA"
// Yes - it will be global
global_stuff = " - Global DATA"
console.log(hello.UseRequire_A());
console.log('After A');
console.log(hello.UseRequire_B());
console.log('After B');
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