public void CALPOLESTR_ConvertAndFree_EmptyStruct()
{
Ole32.CALPOLESTR ca = default;
string?[] values = ca.ConvertAndFree();
Assert.Empty(values);
}
public void CALPOLESTR_ConvertAndFree_SingleItem()
{
Ole32.CALPOLESTR ca = CreateStringVector("Swizzle");
string?[] values = ca.ConvertAndFree();
Assert.Equal(1, values.Length);
Assert.Equal("Swizzle", values[0]);
}
public void CALPOLESTR_ConvertAndFree_FreesMemory()
{
List<IntPtr> allocations = new();
Ole32.CALPOLESTR ca = CreateStringVector(allocations, "Sweet", "Potato");
MallocSpy.FreeTracker tracker = new();
using MallocSpyScope scope = new(tracker);
string?[] values = ca.ConvertAndFree();
Assert.Equal(2, values.Length);
Assert.Equal("Sweet", values[0]);
Assert.Equal("Potato", values[1]);
foreach (IntPtr allocation in allocations)
{
Assert.Contains(allocation, tracker.FreedBlocks);
}
}
private unsafe void OnGetTypeConverterAndTypeEditor(Com2PropertyDescriptor sender, GetTypeConverterAndTypeEditorEvent gveevent)
{
if (sender.TargetObject is not Oleaut32.IPerPropertyBrowsing ppb)
{
return;
}
// check for enums
Ole32.CALPOLESTR caStrings = default;
Ole32.CADWORD caCookies = default;
HRESULT hr;
try
{
hr = ppb.GetPredefinedStrings(sender.DISPID, &caStrings, &caCookies);
}
catch (ExternalException ex)
{
hr = (HRESULT)ex.ErrorCode;
Debug.Fail($"An exception occurred inside IPerPropertyBrowsing::GetPredefinedStrings(dispid={sender.DISPID}), object type={new ComNativeDescriptor().GetClassName(ppb)}");
}
// Terminate the existing editor if we created the current one so if the items have disappeared,
// we don't hold onto the old items.
if (gveevent.TypeConverter is Com2IPerPropertyEnumConverter)
{
gveevent.TypeConverter = null;
}
if (hr == HRESULT.S_OK)
{
string[] names = caStrings.ConvertAndFree();
uint[] cookies = caCookies.ConvertAndFree();
if (names.Length > 0 && cookies.Length > 0)
{
gveevent.TypeConverter = new Com2IPerPropertyEnumConverter(new Com2IPerPropertyBrowsingEnum(sender, names, cookies));
}
}
else
{
// If we didn't get any strings, try the proppage editor
//
// This is a bit of a backwards-compat work around. Many older ActiveX controls will show a
// property page for all properties since the old grid would only put up the [...] button for
// "(Custom)". If we have a conversion editor, don't allow this to override it.
if (sender.ConvertingNativeType)
{
return;
}
Guid guid = GetPropertyPageGuid(ppb, sender.DISPID);
if (!Guid.Empty.Equals(guid))
{
gveevent.TypeEditor = new Com2PropertyPageUITypeEditor(sender, guid, (UITypeEditor)gveevent.TypeEditor);
}
}
}