public static IRawElementProviderFragment GetProvider(Component component,
bool initialize,
bool forceInitializeChildren)
{
if (component == null)
{
//FIXME: we should throw new ArgumentNullException ("component");
return(null);
}
// First check if we've seen this component before
IRawElementProviderFragment provider = FindProvider(component);
if (provider != null)
{
return(provider);
}
// Send a WndProc message to see if the control
// implements it's own provider.
if (component is SWF.Control
// Sending WndProc to a form is broken for some reason
&& !(component is SWF.Form))
{
var control = (SWF.Control)component;
IntPtr result = SWF.NativeWindow.WndProc(
control.Handle,
SWF.Msg.WM_GETOBJECT,
IntPtr.Zero,
new IntPtr(AutomationInteropProvider.RootObjectId));
if (result != IntPtr.Zero)
{
IRawElementProviderSimple iSimpleProvider =
AutomationInteropProvider.RetrieveAndDeleteProvider(result);
provider = (iSimpleProvider as FragmentControlProvider) ?? GetWrapper(component, iSimpleProvider);
}
}
else if (component is UserCustomComponent control)
{
provider = control.Provider;
}
ComponentProviderMapperHandler handler = null;
Type providerType = null;
if (provider == null)
{
Type typeIter = component.GetType();
// Chain up the type hierarchy until we find
// either a type or handler for mapping, or we
// hit Control or Component.
do
{
// First see if there's a mapping handler
if (componentProviderMappers.TryGetValue(typeIter,
out handler))
{
break;
}
// Next, see if we have a type mapping
if (providerComponentMap.TryGetValue(typeIter,
out providerType))
{
break;
}
typeIter = typeIter.BaseType;
} while (typeIter != null &&
typeIter != typeof(System.ComponentModel.Component) &&
typeIter != typeof(SWF.Control));
}
if (handler != null)
{
provider = handler(component);
}
// Create the provider if we found a mapping type
if (provider == null)
{
// We meet a unknown custom control type,
// then we count it as a Pane
if (providerType == null)
{
var dialog = component as SWF.CommonDialog;
if (dialog != null)
{
return(GetProvider(dialog.form, initialize, forceInitializeChildren));
}
providerType = typeof(PaneProvider);
}
try {
provider = (FragmentControlProvider)
Activator.CreateInstance(providerType,
new object [] { component });
} catch (MissingMethodException) {
Log.Error(
"Provider {0} does not have a valid single parameter constructor to handle {1}.",
providerType, component.GetType()
);
return(null);
}
}
if (provider != null)
{
// TODO: Abstract this out?
if (component is SWF.Form)
{
formProviders.Add((IRawElementProviderFragmentRoot)provider);
}
// TODO: Make tracking in dictionary optional
componentProviders [component] = provider;
if (provider is FragmentControlProvider frag)
{
if (initialize)
{
frag.Initialize();
}
if (forceInitializeChildren)
{
frag.InitializeChildControlStructure();
}
}
}
else
{
//FIXME: let's not throw while we are developing, a big WARNING will suffice
//throw new NotImplementedException ("Provider not implemented for control " + component.GetType().Name);
Log.Warn("Provider not implemented for component " + component.GetType());
return(null);
}
return(provider);
}
