/// <summary>
///
/// </summary>
/// <param name="bm"></param>
/// <param name="bookmarkOffset"></param>
/// <returns>The updated bookmark, null if the hyperlink no longer exists in the document</returns>
private Bookmark CalculateBookMarkInfo(Bookmark bm, double?bookmarkOffset = null)
{
if (!bookmarkOffset.HasValue)
{
var rect = bm.Hyperlink.ContentStart.GetCharacterRect(LogicalDirection.Forward);
if (rect.IsEmpty)
{
return(null);
}
bookmarkOffset = rect.Top;
}
TextPointer pos = MainTextBox.GetPositionFromPoint(new Point(0, bookmarkOffset.GetValueOrDefault()), true);
TextPointer endPos = MainTextBox.GetPositionFromPoint(new Point(MainTextBox.ActualWidth, bookmarkOffset.GetValueOrDefault()), true);
if (pos == null)
{
Trace.Fail("Could not get text start position for bookmark");
return(null);
}
if (endPos == null)
{
Trace.Fail("Could not get text end position for bookmark");
return(null);
}
int num = DocumentHelpers.GetLineNumberFromPosition(_mainTextBox, pos);
if (bm.Hyperlink == null)
{
var hyperlink = new Hyperlink(pos, pos);
bm.Hyperlink = hyperlink;
if (BookmarkImage != null)
{
var img = new Image();
img.Source = BookmarkImage;
img.Visibility = Visibility.Collapsed;
bm.Image = img;
hyperlink.Inlines.Add(" ");
}
}
var textRange = new TextRange(pos, endPos);
string toolTipText = textRange.Text;
bm.Line = num;
bm.TopOffset = bookmarkOffset.GetValueOrDefault();
if (string.IsNullOrWhiteSpace(toolTipText))
{
toolTipText = "<<Blank line>>";
}
bm.TooltipText = string.Format("{0} (Line: {1})", toolTipText, num);
bm.Name = bm.TooltipText;
bm.Hyperlink.NavigateUri = new Uri(String.Format("http://bookmark/{0}", bm.Name));
bm.Position = pos;
return(bm);
}