public bool Compare(ITextRangeProvider range)
{
TextRangeProvider rangeProvider = range as TextRangeProvider;
if (rangeProvider == null)
{
return(false);
}
if (rangeProvider.TextProvider != provider)
{
throw new ArgumentException();
}
return((rangeProvider.StartPoint == StartPoint) &&
(rangeProvider.EndPoint == EndPoint));
}
public void MoveEndpointByRange(TextPatternRangeEndpoint endpoint,
ITextRangeProvider targetRange,
TextPatternRangeEndpoint targetEndpoint)
{
TextRangeProvider prov = (TextRangeProvider)targetRange;
int val = (targetEndpoint == TextPatternRangeEndpoint.Start)
? prov.StartPoint : prov.EndPoint;
if (endpoint == TextPatternRangeEndpoint.Start)
{
normalizer.StartPoint = val;
}
else if (endpoint == TextPatternRangeEndpoint.End)
{
normalizer.EndPoint = val;
}
}
public int CompareEndpoints(TextPatternRangeEndpoint endpoint,
ITextRangeProvider targetRange,
TextPatternRangeEndpoint targetEndpoint)
{
TextRangeProvider targetRangeProvider = targetRange as TextRangeProvider;
if (targetRangeProvider == null)
{
throw new ArgumentNullException();
}
if (targetRangeProvider.TextProvider != provider)
{
throw new ArgumentException();
}
int point = endpoint == TextPatternRangeEndpoint.End ? EndPoint : StartPoint;
int targePoint = (targetEndpoint == TextPatternRangeEndpoint.End)
? targetRangeProvider.EndPoint : targetRangeProvider.StartPoint;
return(point.CompareTo(targePoint));
}
public ITextRangeProvider FindAttribute(int attribute, object @value,
bool backward)
{
// Lazy load mappings
if (attr_to_val_handler == null)
{
PopulateAttributeDictionary();
}
if (!attr_to_val_handler.ContainsKey(attribute))
{
return(null);
}
Line line;
LineTag tag;
int pos;
TagDataValueHandler val_handler = attr_to_val_handler[attribute];
Document d = textboxbase.document;
TextRangeProvider range = null;
if (!backward)
{
for (int i = StartPoint; i < EndPoint; i += tag.Length)
{
d.CharIndexToLineTag(i, out line, out tag, out pos);
if (val_handler(new TagData(tag, line)).Equals(@value))
{
if (range == null)
{
range = new TextRangeProvider(provider, textboxbase,
i, i + tag.Length);
}
else
{
range.EndPoint += tag.Length;
}
}
else if (range != null)
{
break;
}
}
}
else
{
for (int i = EndPoint - 1; i >= StartPoint; i -= tag.Length)
{
d.CharIndexToLineTag(i, out line, out tag, out pos);
if (val_handler(new TagData(tag, line)).Equals(@value))
{
if (range == null)
{
int start = i - tag.Length + 1;
range = new TextRangeProvider(provider, textboxbase,
start, start + tag.Length);
}
else
{
range.StartPoint -= tag.Length;
}
}
else if (range != null)
{
break;
}
}
}
return(range);
}
