private static bool IsBetterFilterMatch(
CompletionHelper helper, CompletionItem item1, CompletionItem item2,
string filterText, CompletionTrigger trigger,
CompletionFilterReason filterReason, ImmutableArray <string> recentItems)
{
// For the deletion we bake in the core logic for how betterness should work.
// This way deletion feels the same across all languages that opt into deletion
// as a completion trigger.
if (filterReason == CompletionFilterReason.BackspaceOrDelete)
{
var prefixLength1 = item1.FilterText.GetCaseInsensitivePrefixLength(filterText);
var prefixLength2 = item2.FilterText.GetCaseInsensitivePrefixLength(filterText);
// Prefer the item that matches a longer prefix of the filter text.
if (prefixLength1 > prefixLength2)
{
return(true);
}
// If the lengths are the same, prefer the one with the higher match priority.
// But only if it's an item that would have been hard selected. We don't want
// to aggressively select an item that was only going to be softly offered.
var item1Priority = item1.Rules.SelectionBehavior == CompletionItemSelectionBehavior.HardSelection
? item1.Rules.MatchPriority : MatchPriority.Default;
var item2Priority = item2.Rules.SelectionBehavior == CompletionItemSelectionBehavior.HardSelection
? item2.Rules.MatchPriority : MatchPriority.Default;
if (item1Priority > item2Priority)
{
return(true);
}
return(false);
}
return(helper.IsBetterFilterMatch(item1, item2, filterText, trigger, recentItems));
}