public virtual CompletionSelectionStatus FindMatchedEntry(ICompletionDataList completionDataList, MruCache cache, string partialWord, List <int> filteredItems)
{
// default - word with highest match rating in the list.
int idx = -1;
if (DefaultCompletionString != null && DefaultCompletionString.StartsWith(partialWord, StringComparison.OrdinalIgnoreCase))
{
partialWord = DefaultCompletionString;
}
StringMatcher matcher = null;
if (!string.IsNullOrEmpty(partialWord))
{
matcher = CompletionMatcher.CreateCompletionMatcher(partialWord);
string bestWord = null;
int bestRank = int.MinValue;
int bestIndex = 0;
int bestIndexPriority = int.MinValue;
for (int i = 0; i < filteredItems.Count; i++)
{
int index = filteredItems [i];
var data = completionDataList [index];
if (bestIndexPriority > data.PriorityGroup)
{
continue;
}
string text = data.DisplayText;
int rank;
if (!matcher.CalcMatchRank(text, out rank))
{
continue;
}
if (rank > bestRank || data.PriorityGroup > bestIndexPriority)
{
bestWord = text;
bestRank = rank;
bestIndex = i;
bestIndexPriority = data.PriorityGroup;
}
}
if (bestWord != null)
{
idx = bestIndex;
// exact match found.
if (string.Compare(bestWord, partialWord ?? "", true) == 0)
{
return(new CompletionSelectionStatus(idx));
}
}
}
CompletionData currentData;
int bestMruIndex;
if (idx >= 0)
{
currentData = completionDataList [filteredItems [idx]];
bestMruIndex = cache.GetIndex(currentData);
}
else
{
bestMruIndex = int.MaxValue;
currentData = null;
}
for (int i = 0; i < filteredItems.Count; i++)
{
var mruData = completionDataList [filteredItems [i]];
int curMruIndex = cache.GetIndex(mruData);
if (curMruIndex == 1)
{
continue;
}
if (curMruIndex < bestMruIndex)
{
int r1 = 0, r2 = 0;
if (currentData == null || matcher != null && matcher.CalcMatchRank(mruData.DisplayText, out r1) && matcher.CalcMatchRank(currentData.DisplayText, out r2))
{
if (r1 >= r2 || partialWord.Length == 0 || partialWord.Length == 1 && mruData.DisplayText [0] == partialWord [0])
{
bestMruIndex = curMruIndex;
idx = i;
currentData = mruData;
}
}
}
}
return(new CompletionSelectionStatus(idx));
}