/// <summary>
/// restricts the search result (list of search matches) to a particular section.
/// </summary>
/// <param name="allResults">Search results to be restricted. May be <c>null</c>.</param>
/// <param name="desiredSection">Section to which the results should be restricted.</param>
/// <returns>The restricted list of the search results, may be <c>null</c>.</returns>
/// <since>2.0</since>
public static WordPtr[] RestrictResults(WordPtr[] allResults, string desiredSection)
{
if (allResults == null)
{
return(null);
}
// Count
int fit = 0;
foreach (WordPtr word in allResults)
{
if (isProperSection(word, desiredSection))
{
fit++;
}
}
if (fit == 0)
{
return(null);
}
// Extract
WordPtr[] result = new WordPtr[fit];
int index = 0;
foreach (WordPtr word in allResults)
{
if (isProperSection(word, desiredSection))
{
Debug.Assert(index < fit);
result[index++] = word;
}
}
return(result);
}
private static bool isProperSection(WordPtr word, string section)
{
return(word.Section == section ||
(section == NonSubjectSections && word.Section != SubjectSection));
}