/*
* call-seq:
* WIN32OLE_VARIANT.new(val, vartype) #=> WIN32OLE_VARIANT object.
*
* Returns Ruby object wrapping OLE variant.
* The first argument specifies Ruby object to convert OLE variant variable.
* The second argument specifies VARIANT type.
* In some situation, you need the WIN32OLE_VARIANT object to pass OLE method
*
* shell = WIN32OLE.new("Shell.Application")
* folder = shell.NameSpace("C:\\Windows")
* item = folder.ParseName("tmp.txt")
* # You can't use Ruby String object to call FolderItem.InvokeVerb.
* # Instead, you have to use WIN32OLE_VARIANT object to call the method.
* shortcut = WIN32OLE_VARIANT.new("Create Shortcut(\&S)")
* item.invokeVerb(shortcut)
*
*/
static VALUE
folevariant_initialize(VALUE self, VALUE args)
{
int len = 0;
VARIANT var;
VALUE val;
VALUE vvt;
VARTYPE vt;
struct olevariantdata *pvar;
len = RARRAY_LEN(args);
rb_check_arity(len, 1, 3);
VariantInit(&var);
val = rb_ary_entry(args, 0);
check_type_val2variant(val);
TypedData_Get_Struct(self, struct olevariantdata, &olevariant_datatype, pvar);
if (len == 1) {
ole_val2variant(val, &(pvar->var));
} else {
vvt = rb_ary_entry(args, 1);
vt = RB_NUM2INT(vvt);
if ((vt & VT_TYPEMASK) == VT_RECORD) {
rb_raise(rb_eArgError, "not supported VT_RECORD WIN32OLE_VARIANT object");
}
ole_val2olevariantdata(val, vt, pvar);
}
return self;
}
STDMETHODIMP EVENTSINK_Invoke(
PEVENTSINK pEventSink,
DISPID dispid,
REFIID riid,
LCID lcid,
WORD wFlags,
DISPPARAMS *pdispparams,
VARIANT *pvarResult,
EXCEPINFO *pexcepinfo,
UINT *puArgErr
) {
HRESULT hr;
BSTR bstr;
unsigned int count;
unsigned int i;
ITypeInfo *pTypeInfo;
VARIANT *pvar;
VALUE ary, obj, event, args, outargv, ev, result;
VALUE handler = Qnil;
VALUE arg[3];
VALUE mid;
VALUE is_outarg = Qfalse;
BOOL is_default_handler = FALSE;
int state;
PIEVENTSINKOBJ pEV = (PIEVENTSINKOBJ)pEventSink;
pTypeInfo = pEV->pTypeInfo;
obj = evs_entry(pEV->m_event_id);
if (!rb_obj_is_kind_of(obj, cWIN32OLE_EVENT)) {
return NOERROR;
}
ary = rb_ivar_get(obj, id_events);
if (NIL_P(ary) || !RB_TYPE_P(ary, T_ARRAY)) {
return NOERROR;
}
hr = pTypeInfo->lpVtbl->GetNames(pTypeInfo, dispid,
&bstr, 1, &count);
if (FAILED(hr)) {
return NOERROR;
}
ev = WC2VSTR(bstr);
event = ole_search_event(ary, ev, &is_default_handler);
if (RB_TYPE_P(event, T_ARRAY)) {
handler = rb_ary_entry(event, 0);
mid = rb_intern("call");
is_outarg = rb_ary_entry(event, 3);
} else {
handler = rb_ivar_get(obj, rb_intern("handler"));
if (handler == Qnil) {
return NOERROR;
}
mid = ole_search_handler_method(handler, ev, &is_default_handler);
}
if (handler == Qnil || mid == Qnil) {
return NOERROR;
}
args = rb_ary_new();
if (is_default_handler) {
rb_ary_push(args, ev);
}
/* make argument of event handler */
for (i = 0; i < pdispparams->cArgs; ++i) {
pvar = &pdispparams->rgvarg[pdispparams->cArgs-i-1];
rb_ary_push(args, ole_variant2val(pvar));
}
outargv = Qnil;
if (is_outarg == Qtrue) {
outargv = rb_ary_new();
rb_ary_push(args, outargv);
}
/*
* if exception raised in event callback,
* then you receive cfp consistency error.
* to avoid this error we use begin rescue end.
* and the exception raised then error message print
* and exit ruby process by Win32OLE itself.
*/
arg[0] = handler;
arg[1] = mid;
arg[2] = args;
result = rb_protect(exec_callback, (VALUE)arg, &state);
if (state != 0) {
rescue_callback(Qnil);
}
if(RB_TYPE_P(result, T_HASH)) {
hash2ptr_dispparams(result, pTypeInfo, dispid, pdispparams);
result = hash2result(result);
}else if (is_outarg == Qtrue && RB_TYPE_P(outargv, T_ARRAY)) {
ary2ptr_dispparams(outargv, pdispparams);
}
if (pvarResult) {
VariantInit(pvarResult);
ole_val2variant(result, pvarResult);
}
return NOERROR;
}
