forrest2016-docinfo-footer.html

<script>
    var patternField;
    var matchFn = fuzzy_match;
    var resultsTime;
    var resultsList = null;
    var currentDataSet = dataSets["ue4_filenames"];

    var asyncMatcher = null;

    onload = function() {
        // Initialize document element references
        patternField = document.getElementById('searchPatternField');
        patternField.oninput = onPatternChange;
        patternField.onpropertychange = patternField.oninput;

        resultsTime = document.getElementById('resultsTime');
        resultsList = document.getElementById('resultsList');

        patternField.value = "abc";
        onPatternChange();
    };

    displayResults = function(results) {
        var newResultsList = resultsList.cloneNode(false);

        // Because adding too many elements is catastrophically slow because HTML is slow
        var max_entries = 10;

        // Create HTML elements for results
        for (index = 0; index < results.length && index < max_entries; ++index) {
            var li = document.createElement('li');
            li.innerHTML = results[index];
            newResultsList.appendChild(li);
        }

        // Replace the old results from the DOM.
        resultsList.parentNode.replaceChild(newResultsList, resultsList);
        resultsList = newResultsList;
    };

    onPatternChange = function() {

        // Clear existing async match if it exists
        if (asyncMatcher !== null) {
            asyncMatcher.cancel();
            asyncMatcher = null;
        }

        var pattern = patternField.value;

        // Data not yet loaded
        if (currentDataSet == null)
            return;

        if (resultsList !== null)
        {
            // Clear the list
            var emptyList = resultsList.cloneNode(false);
            resultsList.parentNode.replaceChild(emptyList, resultsList);
            resultsList = emptyList;
        }

        // Early out on empty pattern (such as startup) because JS is slow
        if (pattern.length == 0)
            return;

        var startTime = performance.now();

        asyncMatcher = new fts_fuzzy_match_async(matchFn, pattern, currentDataSet, function(results) {
            // Scored function requires sorting
            if (matchFn == fuzzy_match) {
                results = results
                    .sort(function(a,b) { return b[1] - a[1]; })
                    .map(function(v) { return v[1] + " - " + v[2]; });
            }

            var endTime = performance.now();

            // Display number of matches and how long it took
            resultsTime.innerText = results.length + " matches in " + (endTime - startTime).toFixed(1) + " milliseconds";

            displayResults(results);

            asyncMatcher = null;
        });
        asyncMatcher.start();
    };

    onFormatChange = function(radio) {
        matchFn = radio.value == "PrintByScore" ? fuzzy_match : fuzzy_match_simple;
        onPatternChange();
    }

    onDataSetChange = function(radio) {
        var setname = radio.value;
        currentDataSet = dataSets[setname];
        onPatternChange();
    };

</script>