//////////////////////////////////////////////////////////////////////////////////////////////////////////////
//
// InvokeLinkInternal()
//
// Invoke a hyperlink in the browser window.
//
// Runs on the background thread.
//
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
private void InvokeLinkInternal(IUIAutomationElement elementLink, bool fUseCache)
{
if (elementLink != null)
{
IUIAutomationInvokePattern pattern = null;
int iPatternId = _patternIdInvoke;
// Will we be calling the Invoke() method through the Invoke pattern.
// So first get the pattern for the hyperlink element.
if (fUseCache)
{
// This does not result in a cross-proc call here, and should not fail.
pattern = (IUIAutomationInvokePattern)elementLink.GetCachedPattern(iPatternId);
}
else
{
// This will fail if the element no longer exists.
try
{
pattern = (IUIAutomationInvokePattern)elementLink.GetCurrentPattern(iPatternId);
}
catch
{
// If an exception is throw trying to access the element, do nothing. This will
// occur if the element no longer exists, (eg the browser window has been closed.)
}
}
if (pattern != null)
{
pattern.Invoke();
}
}
}
protected override void Dispose(bool disposing)
{
if (Pattern != null)
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(Pattern);
this.Pattern = null;
}
base.Dispose(disposing);
}
public InvokePattern(A11yElement e, IUIAutomationInvokePattern p) : base(e, PatternType.UIA_InvokePatternId)
{
Pattern = p;
this.IsUIActionable = true;
}
internal static InvokePattern Wrap(
AutomationElement element,
IUIAutomationInvokePattern invokePattern)
{
return(new InvokePattern(element: element, invokePattern: invokePattern));
}
InvokePattern(AutomationElement element, IUIAutomationInvokePattern invokePattern)
: base(el: element)
{
this._invokePattern = invokePattern;
}
public static IUIAutomationElement xtInvoke(this IUIAutomationElement element)
{
_InvokePattern = (IUIAutomationInvokePattern)element.GetCurrentPattern(UIA_PatternIds.UIA_InvokePatternId);
try { _InvokePattern.Invoke(); } catch (COMException com) { }
return(element);
}
public UiAutomationInvokeHint(IntPtr owningWindow, IUIAutomationInvokePattern invokePattern, Rect boundingRectangle)
: base(owningWindow, boundingRectangle)
{
_invokePattern = invokePattern;
}
private InvokePattern(AutomationElement el, IUIAutomationInvokePattern pattern, bool cached)
: base(el, cached)
{
Debug.Assert(pattern != null);
this._pattern = pattern;
}
