/// <summary>
/// Adjust the start and end of the range to match the offset/length, in characters.
/// if the offset/length adjustment fails to produce the expected value,
/// then the adjustment is cancelled and false is returned.
/// </summary>
public static bool AdjustMarkupRange(ref IHTMLTxtRange stagingTextRange, MarkupRange range, int offset, int length)
{
string currentText = GetRangeTextFast(range) ?? "";
if (offset == 0 && length == currentText.Length)
{
return(true);
}
string expectedText;
try
{
expectedText = currentText.Substring(offset, length);
}
catch (ArgumentOutOfRangeException)
{
return(false);
}
MarkupRange testRange = range.Clone();
AdjustMarkupRangeCore(testRange, offset, length, currentText);
if (GetRangeTextFast(testRange) != expectedText)
{
return(false);
}
range.MoveToRange(testRange);
return(true);
}
