Allow option to score code snippets above anything else

[robertjpayne]

It would be nice if it fuzzy autocomplete would score code snippets above anything else if the snippet's completion text is an exact match.

[robertjpayne]

Poking around I couldn't see anything that would give us the ability to check the completion is backed by a snippet/macro.

However, I implemented this by adding a bonus for exact matches:

- (double) scoreItem: (id<DVTTextCompletionItem>) item
        searchString: (NSString *) query
         matchedName: (NSString *) matchedName
          matchScore: (double) matchScore
       matchedRanges: (NSArray *) rangesArray
      priorityFactor: (double) priorityFactor
{
    double invertedPriority = (10.0 / MAX(item.priority, 1.0));
    priorityFactor = MAX(priorityFactor, 1.0);
    NSRange range = [[rangesArray firstObject] rangeValue];
    double prefixBonus = range.location ? 1.0 : 1.0 + (_maxPrefixBonus * range.length) / query.length;
    double matchBonus = [query isEqualToString:matchedName] ? 10.0 : 1.0;
    return matchBonus * pow(matchScore, _matchScorePower) * pow(priorityFactor, _priorityFactorPower) * pow(invertedPriority, _priorityPower) * prefixBonus;
}

I'll see how I go with coding now and if it's a good fit or not.

[slazyk]

Actually you can, you just need to check [item class]. For snippets it is IDECodeSnippetCompletionItem.

But snippets have low item.priority giving high invertedPriority which you can make more important in scoring by simply increasing _priorityPower which in the Advanced Settings is called 'Context'.

Also, matchScore already contains bonus for exact matches from IDEOpenQuicklyPattern. And you can increase bonus of prefix matches over non-prefix matches by adjusting _maxPrefixBonus called 'Prefix' in Advanced Settings.

If it turns out this kind of bonus is really needed, it is also a good idea to try to keep the scoring function as continuous as possible, with the bonus increasing as the match approaches exact match, for example by adding a power to prefix bonus rather than introducing bonus just for exact match.

[HiveHicks]

+1 for this option