private int GetPresetArgumentLength(string expressionString, ISearchExpressionContext context, out IPresetItem validItem)
{
var presetItems = GetPresetItems(context);
var presetArgumentLength = -1;
validItem = null;
foreach (var item in presetItems)
{
var itemValue = context.IsInvariantCulture ? item.Id : item.DisplayValue;
if (itemValue == null)
{
continue;
}
if (expressionString.StartsWith(itemValue, StringComparison.InvariantCultureIgnoreCase) && itemValue.Length > presetArgumentLength)
{
if (expressionString.Length == itemValue.Length)
{
presetArgumentLength = itemValue.Length;
validItem = item;
}
else
{
foreach (var validTail in ValidNexts.OfType <IKeywordToken>())
{
var keywordAlias = context.IsInvariantCulture
? validTail.SerializationAlias
: validTail.Alias;
var validTailIndex = expressionString.IndexOf(keywordAlias, itemValue.Length, StringComparison.InvariantCultureIgnoreCase);
if (validTailIndex == itemValue.Length)
{
presetArgumentLength = itemValue.Length;
validItem = item;
break;
}
}
if (presetArgumentLength == -1)
{
presetArgumentLength = itemValue.Length;
validItem = item;
}
}
}
}
return(presetArgumentLength);
}
private int GetArgumentLegth(string expressionString, bool allowCustomValues)
{
var argumentLength = expressionString.Length;
var validArgumentEndSymbols = allowCustomValues
? ValidNexts.OfType <IKeywordToken>().Select(x => x.Alias)
: ValidNexts.OfType <IKeywordToken>().Select(x => x.Alias).Where(x => !string.IsNullOrWhiteSpace(x));
foreach (var endSymbol in validArgumentEndSymbols)
{
var length = expressionString.IndexOf(endSymbol, StringComparison.InvariantCultureIgnoreCase);
if (length != -1 && length < argumentLength)
{
argumentLength = length;
}
}
return(argumentLength);
}
