static void CheckProviderFromHandle(int handle, string name)
{
var provider =
AutomationInteropProvider.HostProviderFromHandle(new IntPtr(handle));
Assert.IsNotNull(provider, string.Format("{0}'s provider", name));
Assert.AreEqual(
provider.GetPropertyValue(AEIds.NativeWindowHandleProperty.Id),
new IntPtr(handle),
string.Format("{0}'s handle", name));
}
private IRawElementProviderSimple GetHostHelper(HostedWindowWrapper hwndWrapper)
{
return(AutomationInteropProvider.HostProviderFromHandle(hwndWrapper.Handle));
}
// Process all the Element Properties
internal override object GetElementProperty(AutomationProperty idProp)
{
// if the hwnd is a winform, then return the Winform id otherwise let
// UIAutomation do the job
if (idProp == AutomationElement.AutomationIdProperty)
{
// Winforms have a special way to obtain the id
if (WindowsFormsHelper.IsWindowsFormsControl(_hwnd, ref _windowsForms))
{
string sPersistentID = WindowsFormsHelper.WindowsFormsID(_hwnd);
return(string.IsNullOrEmpty(sPersistentID) ? null : sPersistentID);
}
}
else if (idProp == AutomationElement.NameProperty)
{
string name;
// If this is a winforms control and the AccessibleName is set, use it.
if (WindowsFormsHelper.IsWindowsFormsControl(_hwnd, ref _windowsForms))
{
name = GetAccessibleName(NativeMethods.CHILD_SELF);
if (!string.IsNullOrEmpty(name))
{
return(name);
}
}
// Only hwnd's can be labeled.
name = LocalizedName;
// PerSharp/PreFast will flag this as a warning 6507/56507: Prefer 'string.IsNullOrEmpty(name)' over checks for null and/or emptiness.
// It is valid to set LocalizedName to an empty string. LocalizedName being an
// empty string will prevent the SendMessage(WM_GETTEXT) call.
#pragma warning suppress 6507
if (name == null && GetParent() == null)
{
if (_fControlHasLabel)
{
IntPtr label = Misc.GetLabelhwnd(_hwnd);
name = Misc.GetControlName(label, true);
if (!string.IsNullOrEmpty(name))
{
_controlLabel = label;
}
}
else
{
name = Misc.ProxyGetText(_hwnd);
}
}
// If name is still null, and we have an IAccessible, try it:
// this picks up names on HWNDs set through Dynamic Annotation
// (eg. on the richedits in Windows Mail), and holds us over till
// we add DA support to UIA properly.
if (String.IsNullOrEmpty(name))
{
name = GetAccessibleName(NativeMethods.CHILD_SELF);
}
return(name);
}
// Only hwnd's can be labeled.
else if (idProp == AutomationElement.LabeledByProperty && _fControlHasLabel)
{
// This is called to make sure that _controlLabel gets set.
object name = GetElementProperty(AutomationElement.NameProperty);
// If a control has a LocalizedName, the _controlLabel will not get set.
// So look for it now.
if (_controlLabel == IntPtr.Zero && name != null && GetParent() == null)
{
_controlLabel = Misc.GetLabelhwnd(_hwnd);
}
// If we have a cached _controlLabel that means that the name property we just got
// was retreived from the label of the control and not its text or something else. If this
// is the case expose it as the label.
if (_controlLabel != IntPtr.Zero)
{
return(AutomationInteropProvider.HostProviderFromHandle(_controlLabel));
}
}
else if (idProp == AutomationElement.IsOffscreenProperty)
{
if (!SafeNativeMethods.IsWindowVisible(_hwnd))
{
return(true);
}
IntPtr hwndParent = Misc.GetParent(_hwnd);
// Check if rect is within rect of parent. Don't do this for top-level windows,
// however, since the win32 desktop hwnd claims to have a rect only as large as the
// primary monitor, making hwnds on other monitors seem clipped.
if (hwndParent != IntPtr.Zero && hwndParent != UnsafeNativeMethods.GetDesktopWindow())
{
NativeMethods.Win32Rect parentRect = NativeMethods.Win32Rect.Empty;
if (Misc.GetClientRectInScreenCoordinates(hwndParent, ref parentRect) && !parentRect.IsEmpty)
{
Rect itemRect = BoundingRectangle;
if (!itemRect.IsEmpty && !Misc.IsItemVisible(ref parentRect, ref itemRect))
{
return(true);
}
}
}
}
return(base.GetElementProperty(idProp));
}
