private static void OnHtContentChanged(DependencyObject sender, DependencyPropertyChangedEventArgs arg)
{
if (sender is HighlightTextBlock)
{
HighlightTextBlock ctrl = sender as HighlightTextBlock;
HighlightContent content = ctrl.HlContent;
ctrl.Inlines.Clear();
if (content != null)
{
ctrl.Inlines.AddRange(MakeRunsFromContent(content));
}
}
}
private static IEnumerable <Run> MakeRunsFromContent(HighlightContent content)
{
List <Run> listRtn = new List <Run>();
if (!string.IsNullOrWhiteSpace(content.Content))
{
if (string.IsNullOrWhiteSpace(HighlightContent.ToHighlight))
{
listRtn.Add(new Run(content.Content));
}
else
{
string strContent = content.Content.Trim();
string strToHl = HighlightContent.ToHighlight.Trim();
if (HighlightContent.Mode == HighlightContentMode.FullMatch)
{
int iCurrIndex = 0;
while (true)
{
int iFoundIndex = strContent.IndexOf(strToHl, iCurrIndex, StringComparison.OrdinalIgnoreCase);
if (iFoundIndex != -1)
{
if (iFoundIndex > iCurrIndex)
{
listRtn.Add(new Run(strContent.Substring(iCurrIndex, iFoundIndex - iCurrIndex)));
}
listRtn.Add(new Run(strContent.Substring(iFoundIndex, strToHl.Length))
{
Background = Brushes.Yellow
});
}
else
{
if (iCurrIndex < strContent.Length)
{
listRtn.Add(new Run(strContent.Substring(iCurrIndex, strContent.Length - iCurrIndex)));
}
break;
}
iCurrIndex = iFoundIndex + strToHl.Length;
}
}
else
{
int iCurrIndex = 0;
string[] keys = strToHl.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
if (keys.Length == 0)
{
listRtn.Add(new Run(content.Content));
}
else
{
var keysToAnalysis = keys.Select(k => new KeyItem {
Key = k, Finished = false
});
while (true)
{
int iFoundIndex = strContent.Length;
int iFoundKeyLength = 0;
foreach (var key in keysToAnalysis)
{
if (!key.Finished)
{
int iThisFoundIndex = strContent.IndexOf(key.Key, iCurrIndex, StringComparison.OrdinalIgnoreCase);
if (iThisFoundIndex == -1)
{
key.Finished = true;
}
else
{
if (iThisFoundIndex < iFoundIndex)
{
iFoundIndex = iThisFoundIndex;
iFoundKeyLength = key.Key.Length;
}
}
}
}
if (iFoundIndex == strContent.Length)
{
listRtn.Add(new Run(strContent.Substring(iCurrIndex, strContent.Length - iCurrIndex)));
break;
}
else
{
if (iFoundIndex > iCurrIndex)
{
listRtn.Add(new Run(strContent.Substring(iCurrIndex, iFoundIndex - iCurrIndex)));
}
listRtn.Add(new Run(strContent.Substring(iFoundIndex, iFoundKeyLength))
{
Background = Brushes.Yellow
});
}
iCurrIndex = iFoundIndex + iFoundKeyLength;
}
}
}
}
}
return(listRtn);
}
