| protected abstract GetParamAndVarCount ( ) : int | ||
| return | int | |
internal NativeCall(NativeFunction function, Scriptable scope, object[] args)
{
this.function = function;
SetParentScope(scope);
// leave prototype null
this.originalArgs = (args == null) ? ScriptRuntime.emptyArgs : args;
// initialize values of arguments
int paramAndVarCount = function.GetParamAndVarCount();
int paramCount = function.GetParamCount();
if (paramAndVarCount != 0)
{
for (int i = 0; i < paramCount; ++i)
{
string name = function.GetParamOrVarName(i);
object val = i < args.Length ? args[i] : Undefined.instance;
DefineProperty(name, val, PERMANENT);
}
}
// initialize "arguments" property but only if it was not overridden by
// the parameter with the same name
if (!base.Has("arguments", this))
{
DefineProperty("arguments", new Arguments(this), PERMANENT);
}
if (paramAndVarCount != 0)
{
for (int i = paramCount; i < paramAndVarCount; ++i)
{
string name = function.GetParamOrVarName(i);
if (!base.Has(name, this))
{
if (function.GetParamOrVarConst(i))
{
DefineProperty(name, Undefined.instance, CONST);
}
else
{
DefineProperty(name, Undefined.instance, PERMANENT);
}
}
}
}
}
public static void InitScript(NativeFunction funObj, Scriptable thisObj, Context cx, Scriptable scope, bool evalScript)
{
if (cx.topCallScope == null)
{
throw new InvalidOperationException();
}
int varCount = funObj.GetParamAndVarCount();
if (varCount != 0)
{
Scriptable varScope = scope;
// Never define any variables from var statements inside with
// object. See bug 38590.
while (varScope is NativeWith)
{
varScope = varScope.GetParentScope();
}
for (int i = varCount; i-- != 0; )
{
string name = funObj.GetParamOrVarName(i);
bool isConst = funObj.GetParamOrVarConst(i);
// Don't overwrite existing def if already defined in object
// or prototypes of object.
if (!ScriptableObject.HasProperty(scope, name))
{
if (isConst)
{
ScriptableObject.DefineConstProperty(varScope, name);
}
else
{
if (!evalScript)
{
// Global var definitions are supposed to be DONTDELETE
ScriptableObject.DefineProperty(varScope, name, Undefined.instance, ScriptableObject.PERMANENT);
}
else
{
varScope.Put(name, varScope, Undefined.instance);
}
}
}
else
{
ScriptableObject.RedefineProperty(scope, name, isConst);
}
}
}
}
