internal InternalAccessibleObject(AccessibleObject accessibleImplemention)
{
// Get all the casts done here to catch any issues early
publicIAccessible = (IAccessible) accessibleImplemention;
publicIEnumVariant = (UnsafeNativeMethods.IEnumVariant) accessibleImplemention;
publicIOleWindow = (UnsafeNativeMethods.IOleWindow) accessibleImplemention;
publicIReflect = (IReflect) accessibleImplemention;
// Note: Deliberately not holding onto AccessibleObject to enforce all access through the interfaces
}
public EnumVariantObject(AccessibleObject owner, int currentChild)
{
Debug.Assert(owner != null, "Cannot create EnumVariantObject with a null owner");
this.owner = owner;
this.currentChild = currentChild;
}
public EnumVariantObject(AccessibleObject owner)
{
Debug.Assert(owner != null, "Cannot create EnumVariantObject with a null owner");
this.owner = owner;
}
private object AsVariant(AccessibleObject obj)
{
if (obj == this) {
return NativeMethods.CHILDID_SELF;
}
return AsIAccessible(obj);
}
private IAccessible AsIAccessible(AccessibleObject obj)
{
if (obj != null && obj.systemWrapper) {
return obj.systemIAccessible;
}
return obj;
}
/// <internalonly/>
/// <devdoc>
/// Mechanism for overriding default IAccessible.accNavigate behavior of the 'inner' system accessible
/// object (accNavigate is how you move between parent, child and sibling accessible objects).
///
/// USAGE: 'navdir' indicates navigation operation to perform, relative to this accessible object.
/// If operation is unsupported, return false to allow fall-back to default system behavior. Otherwise
/// return destination object in the out parameter, or null to indicate 'off end of list'.
/// </devdoc>
internal virtual bool GetSysChild(AccessibleNavigation navdir, out AccessibleObject accessibleObject)
{
accessibleObject = null;
return false;
}