private static bool IsLargeChangeValueNull(IA11yElement e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
var rangeValue = e.GetPattern(PatternType.UIA_RangeValuePatternId);
if (rangeValue == null)
{
return(true);
}
var largeChange = rangeValue.GetValue <double>("LargeChange");
return(largeChange == default(double));
}
private static bool AreMinMaxValuesCorrect(IA11yElement e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
var rangeValue = e.GetPattern(PatternType.UIA_RangeValuePatternId);
if (rangeValue == null)
{
throw new Exception($"Expected {nameof(rangeValue)} not to be null");
}
return(PropertyValueMatches(rangeValue, "Minimum", 0.0) &&
PropertyValueMatches(rangeValue, "Maximum", 100.0) &&
PropertyValueMatches(rangeValue, "IsReadOnly", true));
}
private static bool IsTextSelectionSupported(IA11yElement e)
{
if (e == null)
{
throw new ArgumentNullException(nameof(e));
}
var textPattern = e.GetPattern(PatternType.UIA_TextPatternId);
if (textPattern == null)
{
return(false);
}
var supportsSelection = textPattern.GetValue <UIAutomationClient.SupportedTextSelection>("SupportedTextSelection");
return(supportsSelection != UIAutomationClient.SupportedTextSelection.SupportedTextSelection_None);
}
private static bool IsVerticallyScrollable(IA11yElement e)
{
if (e == null)
{
throw new ArgumentException(nameof(e));
}
var scrollPattern = e.GetPattern(PatternType.UIA_ScrollPatternId);
if (scrollPattern == null)
{
return(false);
}
var verticalScrollPercent = scrollPattern.GetValue <double>(VerticalScrollPercentProperty);
// DirectUI framework returns "NaN" instead of setting IsXXXScrollable to false in case it is not scrollable.
return(scrollPattern.GetValue <bool>(VerticallyScrollableProperty) &&
!double.IsNaN(verticalScrollPercent));
}