public BestMatchSelector(string searchText)
{
this.searchText = searchText ?? throw new ArgumentNullException(nameof(searchText));
matchPriority = MatchPriority.Nothing;
bestCompletion = null;
acronymMatchIndexes = AcronymSearchHelpers.TryCreateMatchIndexes(searchText);
}
MatchPriority GetMatchPriority(Completion completion)
{
var filterText = completion.TryGetFilterText();
Debug.Assert(!(filterText is null));
if (filterText is null)
{
return(MatchPriority.Other);
}
if (filterText.Equals(searchText, StringComparison.CurrentCulture))
{
return(MatchPriority.Full);
}
bool matchedAcronym = !(acronymMatchIndexes is null) && AcronymSearchHelpers.TryUpdateAcronymIndexes(acronymMatchIndexes, searchText, filterText);
if (matchedAcronym && CountUpperCaseLetters(filterText) == acronymMatchIndexes !.Length)
{
return(MatchPriority.FullAcronym);
}
if (filterText.Equals(searchText, StringComparison.CurrentCultureIgnoreCase))
{
return(MatchPriority.FullIgnoringCase);
}
int index = filterText.IndexOf(searchText, StringComparison.CurrentCulture);
if (index == 0)
{
return(MatchPriority.Start);
}
if (matchedAcronym && acronymMatchIndexes ![0] == 0)
/// <summary>
/// Constructor
/// </summary>
/// <param name="searchText">Search text</param>
public CompletionFilter(string searchText)
{
if (searchText == null)
{
throw new ArgumentNullException(nameof(searchText));
}
this.searchText = searchText;
this.acronymMatchIndexes = AcronymSearchHelpers.TryCreateMatchIndexes(searchText);
}
MatchPriority GetMatchPriority(Completion completion)
{
var filterText = completion.FilterText;
if (filterText.Equals(searchText, StringComparison.CurrentCulture))
{
return(MatchPriority.Full);
}
bool matchedAcronym = acronymMatchIndexes != null && AcronymSearchHelpers.TryUpdateAcronymIndexes(acronymMatchIndexes, searchText, filterText);
if (matchedAcronym && CountUpperCaseLetters(filterText) == acronymMatchIndexes.Length)
{
return(MatchPriority.FullAcronym);
}
if (filterText.Equals(searchText, StringComparison.CurrentCultureIgnoreCase))
{
return(MatchPriority.FullIgnoringCase);
}
int index = filterText.IndexOf(searchText, StringComparison.CurrentCulture);
if (index == 0)
{
return(MatchPriority.Start);
}
if (matchedAcronym && acronymMatchIndexes[0] == 0)
{
return(MatchPriority.StartAcronym);
}
int indexIgnoringCase = filterText.IndexOf(searchText, StringComparison.CurrentCultureIgnoreCase);
if (indexIgnoringCase == 0)
{
return(MatchPriority.StartIgnoringCase);
}
if (index > 0)
{
return(MatchPriority.AnyLocation);
}
if (matchedAcronym)
{
return(MatchPriority.AnyLocationAcronym);
}
if (indexIgnoringCase > 0)
{
return(MatchPriority.AnyLocationIgnoringCase);
}
return(MatchPriority.Other);
}
bool TryUpdateAcronymIndexes(string completionText) => AcronymSearchHelpers.TryUpdateAcronymIndexes(acronymMatchIndexes, searchText, completionText);
