/// <summary>
/// Iterate to the first matching child of an element
/// *after* the specified child.
/// </summary>
/// <param name="element">
/// The element whose children should be iterated.
/// </param>
/// <param name="afterThisChild">
/// The direct child of <paramref name="element"/>
/// after which to iterate, or null if the absolute first
/// matching child is desired.
/// </param>
/// <returns>
/// The first matching <see cref="AutomationElement"/>
/// after <paramref name="afterThisChild"/>.
/// </returns>
private AutomationElement GetFirstChild(AutomationElement element, AutomationElement afterThisChild)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
AddMarkedElement(element);
AutomationElement child;
if (afterThisChild == null)
{
child = GetFirstDirectChild(element);
}
else
{
child = GetNextDirectSibling(afterThisChild);
}
while (child != null && markedElements.Contains(child))
{
child = GetNextDirectSibling(child);
}
if (child == null || markedElements.Contains(child))
{
return(null);
}
AutomationElement firstChild = null;
if (!markedElements.Contains(child) && condition.AppliesTo(child))
{
firstChild = child;
}
else
{
firstChild = GetFirstChild(child);
}
while (firstChild == null && child != null)
{
child = GetNextDirectSibling(child);
if (child == null)
{
return(null);
}
firstChild = GetFirstChild(child);
}
return(firstChild);
}
private List <AutomationElement> Find(TreeScope scope, Condition condition, bool findFirst)
{
// Parent and Ancestors scopes are not supported on
// Windows (this is specified in MSDN, too).
if ((scope & TreeScope.Parent) == TreeScope.Parent ||
(scope & TreeScope.Ancestors) == TreeScope.Ancestors)
{
throw new ArgumentException("scope");
}
List <AutomationElement> found = new List <AutomationElement> ();
if ((!findFirst || found.Count == 0) &&
(scope & TreeScope.Element) == TreeScope.Element &&
condition.AppliesTo(this) &&
(CacheRequest.Current == CacheRequest.DefaultRequest || CacheRequest.Current.TreeFilter.AppliesTo(this)))
{
// TODO: Need to check request's TreeScope, too?
found.Add(GetUpdatedCache(CacheRequest.Current));
}
if ((!findFirst || found.Count == 0) &&
((scope & TreeScope.Children) == TreeScope.Children ||
(scope & TreeScope.Descendants) == TreeScope.Descendants))
{
TreeScope childScope = TreeScope.Element;
if ((scope & TreeScope.Descendants) == TreeScope.Descendants)
{
childScope = TreeScope.Subtree;
}
AutomationElement current =
TreeWalker.RawViewWalker.GetFirstChild(this);
while (current != null)
{
//Log.Debug ("Inspecting child: " + current.Current.Name);
found.AddRange(current.Find(childScope, condition, findFirst));
if (findFirst && found.Count > 0)
{
break;
}
current = TreeWalker.RawViewWalker.GetNextSibling(current);
}
}
return(found);
}
public AutomationElement Normalize(AutomationElement element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (Condition.AppliesTo(element))
{
return(element);
}
if (element == AutomationElement.RootElement)
{
// LAMESPEC: This is according to MSDN:
// http://msdn.microsoft.com/en-us/library/system.windows.automation.treewalker.normalize.aspx
// return element;
// This is matching Microsoft's actual implementation:
return(null);
}
return(Normalize(RawViewWalker.GetParent(element)));
}
private List<AutomationElement> Find (TreeScope scope, Condition condition, bool findFirst)
{
// Parent and Ancestors scopes are not supported on
// Windows (this is specified in MSDN, too).
if ((scope & TreeScope.Parent) == TreeScope.Parent ||
(scope & TreeScope.Ancestors) == TreeScope.Ancestors)
throw new ArgumentException ("scope");
List<AutomationElement> found = new List<AutomationElement> ();
if ((!findFirst || found.Count == 0) &&
(scope & TreeScope.Element) == TreeScope.Element &&
condition.AppliesTo (this) &&
(CacheRequest.Current == CacheRequest.DefaultRequest || CacheRequest.Current.TreeFilter.AppliesTo (this))) {
// TODO: Need to check request's TreeScope, too?
found.Add (GetUpdatedCache (CacheRequest.Current));
}
if ((!findFirst || found.Count == 0) &&
((scope & TreeScope.Children) == TreeScope.Children ||
(scope & TreeScope.Descendants) == TreeScope.Descendants)) {
TreeScope childScope = TreeScope.Element;
if ((scope & TreeScope.Descendants) == TreeScope.Descendants)
childScope = TreeScope.Subtree;
AutomationElement current =
TreeWalker.RawViewWalker.GetFirstChild (this);
while (current != null) {
//Log.Debug ("Inspecting child: " + current.Current.Name);
found.AddRange (current.Find (childScope, condition, findFirst));
if (findFirst && found.Count > 0)
break;
current = TreeWalker.RawViewWalker.GetNextSibling (current);
}
}
return found;
}
internal override bool AppliesTo(AutomationElement element)
{
return(!condition.AppliesTo(element));
}
