/// <summary>
/// Mouse timer event handler
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ontimerMouseElapsedEvent(object sender, ElapsedEventArgs e)
{
lock (_elementSetterLock)
{
if (this.timerMouse != null && this.IsStarted)
{
NativeMethods.GetCursorPos(out Point p);
if (LastMousePoint.Equals(p) && this.POIPoint.Equals(p) == false)
{
var element = GetElementBasedOnScope(A11yAutomation.ElementFromPoint(p.X, p.Y));
if (element != null && element.IsRootElement() == false && element.IsSameUIElement(this.SelectedElementRuntimeId, this.SelectedBoundingRectangle, this.SelectedControlTypeId, this.SelectedName) == false && !POIPoint.Equals(p))
{
this.SelectedElementRuntimeId = element.RuntimeId;
this.SelectedBoundingRectangle = element.BoundingRectangle;
this.SelectedControlTypeId = element.ControlTypeId;
this.SelectedName = element.Name;
this.SetElement?.Invoke(element);
}
else
{
element?.Dispose();
element = null;
}
POIPoint = p;
}
LastMousePoint = p;
this.timerMouse?.Start(); // make sure that it is disabled.
}
}
}
/// <summary>
/// Constructor DesktopElementAncestry
/// Get Ancestry Tree elements up to Desktop(at best)
/// </summary>
/// <param name="walker"></param>
/// <param name="e"></param>
public DesktopElementAncestry(TreeViewMode mode, A11yElement e, bool setMem = false)
{
this.TreeWalker = A11yAutomation.GetTreeWalker(mode);
this.TreeWalkerMode = mode;
this.Items = new List <A11yElement>();
this.SetMembers = setMem;
SetParent(e, -1);
if (Items.Count != 0)
{
this.First = Items.Last();
this.Last = Items.First();
if (this.Last.IsRootElement() == false)
{
this.Last.Children.Clear();
this.NextId = PopulateSiblingTreeNodes(this.Last, e);
}
else
{
this.NextId = 1;
}
}
Marshal.ReleaseComObject(this.TreeWalker);
}
private IUIAutomationElement GetNearbyElement(GetElementDelegate getNextElement)
{
var currentElement = GetCurrentElement();
if (currentElement == null)
{
return(null);
}
var treeWalker = A11yAutomation.GetTreeWalker(this.TreeViewMode);
var nextElement = getNextElement?.Invoke(treeWalker, currentElement);
if (nextElement == null)
{
Marshal.ReleaseComObject(treeWalker);
return(null);
}
// make sure that we skip an element from current process while walking tree.
// this code should be hit only at App level. but for sure.
if (DesktopElement.IsFromCurrentProcess(nextElement))
{
var tmp = nextElement;
nextElement = getNextElement?.Invoke(treeWalker, nextElement);
// since element is not in use, release.
Marshal.ReleaseComObject(tmp);
}
Marshal.ReleaseComObject(treeWalker);
return(nextElement);
}
/// <summary>
/// Populate tree by retrieving all children at once.
/// </summary>
/// <param name="rootNode"></param>
private void PopulateChildrenTreeNode(A11yElement rootNode, int startId)
{
int childId = startId;
IUIAutomationTreeWalker walker = A11yAutomation.GetTreeWalker(this.WalkerMode);
IUIAutomationElement child = (IUIAutomationElement)rootNode.PlatformObject;
if (child != null)
{
try
{
child = walker.GetFirstChildElement(child);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
ex.ReportException();
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
while (child != null)
{
#pragma warning disable CA2000 // childNode will be disposed by the parent node
// Create child without populating basic property. it will be set all at once in parallel.
var childNode = new DesktopElement(child, true, false)
{
UniqueId = childId++
};
#pragma warning restore CA2000 // childNode will be disposed by the parent node
rootNode.Children.Add(childNode);
childNode.Parent = rootNode;
childNode.TreeWalkerMode = this.WalkerMode;
this.Elements.Add(childNode);
try
{
child = walker.GetNextSiblingElement(child);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
ex.ReportException();
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
}
}
Marshal.ReleaseComObject(walker);
}
/// <summary>
/// Populate tree by retrieving all children at once.
/// </summary>
/// <param name="rootNode"></param>
/// <param name="parentNode"></param>
/// <param name="startChildId"></param>
private int PopulateChildrenTreeNode(A11yElement rootNode, A11yElement parentNode, int startChildId)
{
this.Elements.Add(rootNode);
rootNode.Parent = parentNode;
rootNode.TreeWalkerMode = this.WalkerMode; // set tree walker mode.
IUIAutomationTreeWalker walker = A11yAutomation.GetTreeWalker(this.WalkerMode);
IUIAutomationElement child = (IUIAutomationElement)rootNode.PlatformObject;
if (child != null)
{
try
{
child = walker.GetFirstChildElement(child);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
ex.ReportException();
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
while (child != null && _elementCounter.TryIncrement())
{
// Create child without populating basic property. it will be set all at once in parallel.
var childNode = new DesktopElement(child, true, false);
rootNode.Children.Add(childNode);
childNode.Parent = rootNode;
childNode.UniqueId = startChildId++;
startChildId = PopulateChildrenTreeNode(childNode, rootNode, startChildId);
try
{
child = walker.GetNextSiblingElement(child);
}
#pragma warning disable CA1031 // Do not catch general exception types
catch (Exception ex)
{
ex.ReportException();
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
#pragma warning restore CA1031 // Do not catch general exception types
}
}
Marshal.ReleaseComObject(walker);
return(startChildId);
}
public IEnumerable <A11yElement> LocateRootElements(int processId)
{
try
{
var desktopElements = A11yAutomation.ElementsFromProcessId(processId);
return(GetA11YElementsFromDesktopElements(desktopElements));
}
catch (Exception ex)
{
throw new AxeWindowsAutomationException(string.Format(CultureInfo.InvariantCulture, DisplayStrings.ErrorFailToGetRootElementOfProcess, processId, ex), ex);
}
}
public A11yElement LocateRootElement(int processId)
{
try
{
var element = A11yAutomation.ElementFromProcessId(processId);
return(new ElementContext(element).Element);
}
catch (Exception ex)
{
throw new AxeWindowsAutomationException(string.Format(CultureInfo.InvariantCulture, DisplayStrings.ErrorFailToGetRootElementOfProcess, processId, ex), ex);
}
}
public A11yElement LocateRootElement(int processId)
{
try
{
var element = A11yAutomation.ElementFromProcessId(processId);
#pragma warning disable CA2000 // Call IDisposable.Dispose()
return(new ElementContext(element).Element);
#pragma warning restore CA2000
}
catch (Exception ex)
{
throw new AxeWindowsAutomationException(string.Format(CultureInfo.InvariantCulture, DisplayStrings.ErrorFailToGetRootElementOfProcess, processId, ex), ex);
}
}
/// <summary>
/// Populate tree by retrieving all children at once.
/// </summary>
/// <param name="rootNode"></param>
private void PopulateChildrenTreeNode(A11yElement rootNode, int startId)
{
int childId = startId;
IUIAutomationTreeWalker walker = A11yAutomation.GetTreeWalker(this.WalkerMode);
IUIAutomationElement child = (IUIAutomationElement)rootNode.PlatformObject;
if (child != null)
{
try
{
child = walker.GetFirstChildElement(child);
}
catch (Exception ex)
{
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
while (child != null)
{
// Create child without populating basic property. it will be set all at once in parallel.
var childNode = new DesktopElement(child, true, false)
{
UniqueId = childId++
};
rootNode.Children.Add(childNode);
childNode.Parent = rootNode;
childNode.TreeWalkerMode = this.WalkerMode;
this.Elements.Add(childNode);
try
{
child = walker.GetNextSiblingElement(child);
}
catch (Exception ex)
{
child = null;
System.Diagnostics.Trace.WriteLine("Tree walker exception: " + ex);
}
}
}
Marshal.ReleaseComObject(walker);
}
/// <summary>
/// Get Element based on Scope
/// if Scope is Element, returns the current element
/// if Scope is App, find out App element and return the App element
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
protected A11yElement GetElementBasedOnScope(A11yElement e)
{
if (e != null && Scope == SelectionScope.App)
{
var el = A11yAutomation.GetAppElement(e);
// if the original selection is Top most element of the app, it should not be released.
if (e != el)
{
e.Dispose();
}
return(el);
}
return(e);
}
/// <summary>
/// Locate the target element in the UIA tree
/// </summary>
/// <param name="parameters">The caller-provided parameters</param>
/// <returns>The ElementContext that matches the targeting parameters</returns>
internal static ElementContext LocateElement(CommandParameters parameters)
{
if (parameters.TryGetLong(CommandConstStrings.TargetProcessId, out long parameterPid))
{
try
{
var element = A11yAutomation.ElementFromProcessId((int)parameterPid);
return(new ElementContext(element));
}
catch (Exception ex)
{
throw new A11yAutomationException(string.Format(CultureInfo.InvariantCulture, DisplayStrings.ErrorFailToGetRootElementOfProcess, parameterPid, ex), ex);
}
}
throw new A11yAutomationException(DisplayStrings.ErrorNoProcessIdSet);
}
/// <summary>
/// Mouse timer event handler
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ontimerMouseElapsedEvent(object sender, ElapsedEventArgs e)
{
lock (_elementSetterLock)
{
if (this.timerMouse != null && this.IsStarted)
{
NativeMethods.GetCursorPos(out Point p);
if (LastMousePoint.Equals(p) && !this.POIPoint.Equals(p))
{
var element = GetElementBasedOnScope(A11yAutomation.NormalizedElementFromPoint(p.X, p.Y, this.TreeViewMode));
if (!SelectElementIfItIsEligible(element))
{
element?.Dispose();
}
POIPoint = p;
}
LastMousePoint = p;
this.timerMouse?.Start(); // make sure that it is enabled.
}
}
}
