Function superMatcher

2.0.3/2.0.3.js:2587–2676

( seed, context, xml, results, expandContext )

                bySet = setMatchers.length > 0,
                byElement = elementMatchers.length > 0,
                superMatcher = function( seed, context, xml, results, expandContext ) {
                    var elem, j, matcher,
                        setMatched = [],
                        matchedCount = 0,
                        i = "0",
                        unmatched = seed && [],
                        outermost = expandContext != null,
                        contextBackup = outermostContext,
                    // We must always have either seed elements or context
                        elems = seed || byElement && Expr.find["TAG"]( "*", expandContext && context.parentNode || context ),
                    // Use integer dirruns iff this is the outermost matcher
                        dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1);

                    if ( outermost ) {
                        outermostContext = context !== document && context;
                        cachedruns = matcherCachedRuns;
                    }

                    // Add elements passing elementMatchers directly to results
                    // Keep `i` a string if there are no elements so `matchedCount` will be "00" below
                    for ( ; (elem = elems[i]) != null; i++ ) {
                        if ( byElement && elem ) {
                            j = 0;
                            while ( (matcher = elementMatchers[j++]) ) {
                                if ( matcher( elem, context, xml ) ) {
                                    results.push( elem );
                                    break;
                                }
                            }
                            if ( outermost ) {
                                dirruns = dirrunsUnique;
                                cachedruns = ++matcherCachedRuns;
                            }
                        }

                        // Track unmatched elements for set filters
                        if ( bySet ) {
                            // They will have gone through all possible matchers
                            if ( (elem = !matcher && elem) ) {
                                matchedCount--;
                            }

                            // Lengthen the array for every element, matched or not
                            if ( seed ) {
                                unmatched.push( elem );
                            }
                        }
                    }

                    // Apply set filters to unmatched elements
                    matchedCount += i;
                    if ( bySet && i !== matchedCount ) {
                        j = 0;
                        while ( (matcher = setMatchers[j++]) ) {
                            matcher( unmatched, setMatched, context, xml );
                        }

                        if ( seed ) {