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sberdyug/autocomplete.js

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Created June 29, 2022 22:00
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  1. @Kcko Kcko created this gist Feb 1, 2019.
    850 changes: 850 additions & 0 deletions autocomplete.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,850 @@
    /*
    * jQuery Autocomplete plugin 1.2.3
    *
    * Copyright (c) 2009 Jörn Zaefferer
    *
    * Dual licensed under the MIT and GPL licenses:
    * http://www.opensource.org/licenses/mit-license.php
    * http://www.gnu.org/licenses/gpl.html
    *
    * With small modifications by Alfonso Gómez-Arzola.
    * See changelog for details.
    *
    */

    ;(function($) {

    $.fn.extend({
    autocomplete: function(urlOrData, options) {
    var isUrl = typeof urlOrData == "string";
    options = $.extend({}, $.Autocompleter.defaults, {
    url: isUrl ? urlOrData : null,
    data: isUrl ? null : urlOrData,
    delay: isUrl ? $.Autocompleter.defaults.delay : 10,
    max: options && !options.scroll ? 10 : 150,
    noRecord: "No Records."
    }, options);

    // if highlight is set to false, replace it with a do-nothing function
    options.highlight = options.highlight || function(value) { return value; };

    // if the formatMatch option is not specified, then use formatItem for backwards compatibility
    options.formatMatch = options.formatMatch || options.formatItem;

    return this.each(function() {
    new $.Autocompleter(this, options);
    });
    },
    result: function(handler) {
    return this.bind("result", handler);
    },
    search: function(handler) {
    return this.trigger("search", [handler]);
    },
    flushCache: function() {
    return this.trigger("flushCache");
    },
    setOptions: function(options){
    return this.trigger("setOptions", [options]);
    },
    unautocomplete: function() {
    return this.trigger("unautocomplete");
    }
    });

    $.Autocompleter = function(input, options) {

    var KEY = {
    UP: 38,
    DOWN: 40,
    DEL: 46,
    TAB: 9,
    RETURN: 13,
    ESC: 27,
    COMMA: 188,
    PAGEUP: 33,
    PAGEDOWN: 34,
    BACKSPACE: 8
    };

    var globalFailure = null;
    if(options.failure != null && typeof options.failure == "function") {
    globalFailure = options.failure;
    }

    // Create $ object for input element
    var $input = $(input).attr("autocomplete", "off").addClass(options.inputClass);

    var timeout;
    var previousValue = "";
    var cache = $.Autocompleter.Cache(options);
    var hasFocus = 0;
    var lastKeyPressCode;
    var config = {
    mouseDownOnSelect: false
    };
    var select = $.Autocompleter.Select(options, input, selectCurrent, config);

    var blockSubmit;

    // prevent form submit in opera when selecting with return key
    navigator.userAgent.indexOf("Opera") != -1 && $(input.form).bind("submit.autocomplete", function() {
    if (blockSubmit) {
    blockSubmit = false;
    return false;
    }
    });

    // older versions of opera don't trigger keydown multiple times while pressed, others don't work with keypress at all
    $input.bind((navigator.userAgent.indexOf("Opera") != -1 && !'KeyboardEvent' in window ? "keypress" : "keydown") + ".autocomplete", function(event) {
    // a keypress means the input has focus
    // avoids issue where input had focus before the autocomplete was applied
    hasFocus = 1;
    // track last key pressed
    lastKeyPressCode = event.keyCode;
    switch(event.keyCode) {

    case KEY.UP:
    if ( select.visible() ) {
    event.preventDefault();
    select.prev();
    } else {
    onChange(0, true);
    }
    break;

    case KEY.DOWN:
    if ( select.visible() ) {
    event.preventDefault();
    select.next();
    } else {
    onChange(0, true);
    }
    break;

    case KEY.PAGEUP:
    if ( select.visible() ) {
    event.preventDefault();
    select.pageUp();
    } else {
    onChange(0, true);
    }
    break;

    case KEY.PAGEDOWN:
    if ( select.visible() ) {
    event.preventDefault();
    select.pageDown();
    } else {
    onChange(0, true);
    }
    break;

    // matches also semicolon
    case options.multiple && $.trim(options.multipleSeparator) == "," && KEY.COMMA:
    case KEY.TAB:
    case KEY.RETURN:
    if( selectCurrent() ) {
    // stop default to prevent a form submit, Opera needs special handling
    event.preventDefault();
    blockSubmit = true;
    return false;
    }
    break;

    case KEY.ESC:
    select.hide();
    break;

    default:
    clearTimeout(timeout);
    timeout = setTimeout(onChange, options.delay);
    break;
    }
    }).focus(function(){
    // track whether the field has focus, we shouldn't process any
    // results if the field no longer has focus
    hasFocus++;
    }).blur(function() {
    hasFocus = 0;
    if (!config.mouseDownOnSelect) {
    hideResults();
    }
    }).click(function() {
    // show select when clicking in a focused field
    // but if clickFire is true, don't require field
    // to be focused to begin with; just show select
    if( options.clickFire ) {
    if ( !select.visible() ) {
    onChange(0, true);
    }
    } else {
    if ( hasFocus++ > 1 && !select.visible() ) {
    onChange(0, true);
    }
    }
    }).bind("search", function() {
    // TODO why not just specifying both arguments?
    var fn = (arguments.length > 1) ? arguments[1] : null;
    function findValueCallback(q, data) {
    var result;
    if( data && data.length ) {
    for (var i=0; i < data.length; i++) {
    if( data[i].result.toLowerCase() == q.toLowerCase() ) {
    result = data[i];
    break;
    }
    }
    }
    if( typeof fn == "function" ) fn(result);
    else $input.trigger("result", result && [result.data, result.value]);
    }
    $.each(trimWords($input.val()), function(i, value) {
    request(value, findValueCallback, findValueCallback);
    });
    }).bind("flushCache", function() {
    cache.flush();
    }).bind("setOptions", function() {
    $.extend(true, options, arguments[1]);
    // if we've updated the data, repopulate
    if ( "data" in arguments[1] )
    cache.populate();
    }).bind("unautocomplete", function() {
    select.unbind();
    $input.unbind();
    $(input.form).unbind(".autocomplete");
    });


    function selectCurrent() {
    var selected = select.selected();
    if( !selected )
    return false;

    var v = selected.result;
    previousValue = v;

    if ( options.multiple ) {
    var words = trimWords($input.val());
    if ( words.length > 1 ) {
    var seperator = options.multipleSeparator.length;
    var cursorAt = $(input).selection().start;
    var wordAt, progress = 0;
    $.each(words, function(i, word) {
    progress += word.length;
    if (cursorAt <= progress) {
    wordAt = i;
    return false;
    }
    progress += seperator;
    });
    words[wordAt] = v;
    // TODO this should set the cursor to the right position, but it gets overriden somewhere
    //$.Autocompleter.Selection(input, progress + seperator, progress + seperator);
    v = words.join( options.multipleSeparator );
    }
    v += options.multipleSeparator;
    }


    $input.val(v);
    hideResultsNow();
    $input.trigger("result", [selected.data, selected.value]);
    return true;
    }

    function onChange(crap, skipPrevCheck) {
    if( lastKeyPressCode == KEY.DEL ) {
    select.hide();
    return;
    }

    var currentValue = $input.val();

    if ( !skipPrevCheck && currentValue == previousValue )
    return;

    previousValue = currentValue;

    currentValue = lastWord(currentValue);
    if ( currentValue.length >= options.minChars) {
    $input.addClass(options.loadingClass);
    if (!options.matchCase)
    currentValue = currentValue.toLowerCase();
    request(currentValue, receiveData, hideResultsNow);
    } else {
    stopLoading();
    select.hide();
    }
    };

    function trimWords(value) {
    if (!value)
    return [""];
    if (!options.multiple)
    return [$.trim(value)];
    return $.map(value.split(options.multipleSeparator), function(word) {
    return $.trim(value).length ? $.trim(word) : null;
    });
    }

    function lastWord(value) {
    if ( !options.multiple )
    return value;
    var words = trimWords(value);
    if (words.length == 1)
    return words[0];
    var cursorAt = $(input).selection().start;
    if (cursorAt == value.length) {
    words = trimWords(value)
    } else {
    words = trimWords(value.replace(value.substring(cursorAt), ""));
    }
    return words[words.length - 1];
    }

    // fills in the input box w/the first match (assumed to be the best match)
    // q: the term entered
    // sValue: the first matching result
    function autoFill(q, sValue){
    // autofill in the complete box w/the first match as long as the user hasn't entered in more data
    // if the last user key pressed was backspace, don't autofill
    if( options.autoFill && (lastWord($input.val()).toLowerCase() == q.toLowerCase()) && lastKeyPressCode != KEY.BACKSPACE ) {
    // fill in the value (keep the case the user has typed)
    $input.val($input.val() + sValue.substring(lastWord(previousValue).length));
    // select the portion of the value not typed by the user (so the next character will erase)
    $(input).selection(previousValue.length, previousValue.length + sValue.length);
    }
    };

    function hideResults() {
    clearTimeout(timeout);
    timeout = setTimeout(hideResultsNow, 200);
    };

    function hideResultsNow() {
    var wasVisible = select.visible();
    select.hide();
    clearTimeout(timeout);
    stopLoading();
    if (options.mustMatch) {
    // call search and run callback
    $input.search(
    function (result){
    // if no value found, clear the input box
    if( !result ) {
    if (options.multiple) {
    var words = trimWords($input.val()).slice(0, -1);
    $input.val( words.join(options.multipleSeparator) + (words.length ? options.multipleSeparator : "") );
    }
    else {
    $input.val( "" );
    $input.trigger("result", null);
    }
    }
    }
    );
    }
    };

    function receiveData(q, data) {
    if ( data && data.length && hasFocus ) {
    stopLoading();
    select.display(data, q);
    autoFill(q, data[0].value);
    select.show();
    } else {
    hideResultsNow();
    }
    };

    function request(term, success, failure) {
    if (!options.matchCase)
    term = term.toLowerCase();
    var data = cache.load(term);
    // recieve the cached data
    if (data) {
    if(data.length) {
    success(term, data);
    }
    else{
    var parsed = options.parse && options.parse(options.noRecord) || parse(options.noRecord);
    success(term,parsed);
    }
    // if an AJAX url has been supplied, try loading the data now
    } else if( (typeof options.url == "string") && (options.url.length > 0) ){

    var extraParams = {
    timestamp: +new Date()
    };
    $.each(options.extraParams, function(key, param) {
    extraParams[key] = typeof param == "function" ? param() : param;
    });

    $.ajax({
    // try to leverage ajaxQueue plugin to abort previous requests
    mode: "abort",
    // limit abortion to this input
    port: "autocomplete" + input.name,
    dataType: options.dataType,
    url: options.url,
    data: $.extend({
    q: lastWord(term),
    limit: options.max
    }, extraParams),
    success: function(data) {
    var parsed = options.parse && options.parse(data) || parse(data);
    cache.add(term, parsed);
    success(term, parsed);
    }
    });
    } else {
    // if we have a failure, we need to empty the list -- this prevents the the [TAB] key from selecting the last successful match
    select.emptyList();
    if(globalFailure != null) {
    globalFailure();
    }
    else {
    failure(term);
    }
    }
    };

    function parse(data) {
    var parsed = [];
    var rows = data.split("\n");
    for (var i=0; i < rows.length; i++) {
    var row = $.trim(rows[i]);
    if (row) {
    row = row.split("|");
    parsed[parsed.length] = {
    data: row,
    value: row[0],
    result: options.formatResult && options.formatResult(row, row[0]) || row[0]
    };
    }
    }
    return parsed;
    };

    function stopLoading() {
    $input.removeClass(options.loadingClass);
    };

    };

    $.Autocompleter.defaults = {
    inputClass: "ac_input",
    resultsClass: "ac_results",
    loadingClass: "ac_loading",
    minChars: 1,
    delay: 400,
    matchCase: false,
    matchSubset: true,
    matchContains: false,
    cacheLength: 100,
    max: 1000,
    mustMatch: false,
    extraParams: {},
    selectFirst: true,
    formatItem: function(row) { return row[0]; },
    formatMatch: null,
    autoFill: false,
    width: 0,
    multiple: false,
    multipleSeparator: " ",
    inputFocus: true,
    clickFire: false,
    highlight: function(value, term) {
    return value.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + term.replace(/([\^\$\(\)\[\]\{\}\*\.\+\?\|\\])/gi, "\\$1") + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>");
    },
    scroll: true,
    scrollHeight: 180,
    scrollJumpPosition: true
    };

    $.Autocompleter.Cache = function(options) {

    var data = {};
    var length = 0;

    function matchSubset(s, sub) {
    if (!options.matchCase)
    s = s.toLowerCase();
    var i = s.indexOf(sub);
    if (options.matchContains == "word"){
    i = s.toLowerCase().search("\\b" + sub.toLowerCase());
    }
    if (i == -1) return false;
    return i == 0 || options.matchContains;
    };

    function add(q, value) {
    if (length > options.cacheLength){
    flush();
    }
    if (!data[q]){
    length++;
    }
    data[q] = value;
    }

    function populate(){
    if( !options.data ) return false;
    // track the matches
    var stMatchSets = {},
    nullData = 0;

    // no url was specified, we need to adjust the cache length to make sure it fits the local data store
    if( !options.url ) options.cacheLength = 1;

    // track all options for minChars = 0
    stMatchSets[""] = [];

    // loop through the array and create a lookup structure
    for ( var i = 0, ol = options.data.length; i < ol; i++ ) {
    var rawValue = options.data[i];
    // if rawValue is a string, make an array otherwise just reference the array
    rawValue = (typeof rawValue == "string") ? [rawValue] : rawValue;

    var value = options.formatMatch(rawValue, i+1, options.data.length);
    if ( typeof(value) === 'undefined' || value === false )
    continue;

    var firstChar = value.charAt(0).toLowerCase();
    // if no lookup array for this character exists, look it up now
    if( !stMatchSets[firstChar] )
    stMatchSets[firstChar] = [];

    // if the match is a string
    var row = {
    value: value,
    data: rawValue,
    result: options.formatResult && options.formatResult(rawValue) || value
    };

    // push the current match into the set list
    stMatchSets[firstChar].push(row);

    // keep track of minChars zero items
    if ( nullData++ < options.max ) {
    stMatchSets[""].push(row);
    }
    };

    // add the data items to the cache
    $.each(stMatchSets, function(i, value) {
    // increase the cache size
    options.cacheLength++;
    // add to the cache
    add(i, value);
    });
    }

    // populate any existing data
    setTimeout(populate, 25);

    function flush(){
    data = {};
    length = 0;
    }

    return {
    flush: flush,
    add: add,
    populate: populate,
    load: function(q) {
    if (!options.cacheLength || !length)
    return null;
    /*
    * if dealing w/local data and matchContains than we must make sure
    * to loop through all the data collections looking for matches
    */
    if( !options.url && options.matchContains ){
    // track all matches
    var csub = [];
    // loop through all the data grids for matches
    for( var k in data ){
    // don't search through the stMatchSets[""] (minChars: 0) cache
    // this prevents duplicates
    if( k.length > 0 ){
    var c = data[k];
    $.each(c, function(i, x) {
    // if we've got a match, add it to the array
    if (matchSubset(x.value, q)) {
    csub.push(x);
    }
    });
    }
    }
    return csub;
    } else
    // if the exact item exists, use it
    if (data[q]){
    return data[q];
    } else
    if (options.matchSubset) {
    for (var i = q.length - 1; i >= options.minChars; i--) {
    var c = data[q.substr(0, i)];
    if (c) {
    var csub = [];
    $.each(c, function(i, x) {
    if (matchSubset(x.value, q)) {
    csub[csub.length] = x;
    }
    });
    return csub;
    }
    }
    }
    return null;
    }
    };
    };

    $.Autocompleter.Select = function (options, input, select, config) {
    var CLASSES = {
    ACTIVE: "ac_over"
    };

    var listItems,
    active = -1,
    data,
    term = "",
    needsInit = true,
    element,
    list;

    // Create results
    function init() {
    if (!needsInit)
    return;
    element = $("<div/>")
    .hide()
    .addClass(options.resultsClass)
    .css("position", "absolute")
    .appendTo(document.body)
    .hover(function(event) {
    // Browsers except FF do not fire mouseup event on scrollbars, resulting in mouseDownOnSelect remaining true, and results list not always hiding.
    if($(this).is(":visible")) {
    input.focus();
    }
    config.mouseDownOnSelect = false;
    });

    list = $("<ul/>").appendTo(element).mouseover( function(event) {
    if(target(event).nodeName && target(event).nodeName.toUpperCase() == 'LI') {
    active = $("li", list).removeClass(CLASSES.ACTIVE).index(target(event));
    $(target(event)).addClass(CLASSES.ACTIVE);
    }
    }).click(function(event) {
    $(target(event)).addClass(CLASSES.ACTIVE);
    select();
    if( options.inputFocus )
    input.focus();
    return false;
    }).mousedown(function() {
    config.mouseDownOnSelect = true;
    }).mouseup(function() {
    config.mouseDownOnSelect = false;
    });

    if( options.width > 0 )
    element.css("width", options.width);

    needsInit = false;
    }

    function target(event) {
    var element = event.target;
    while(element && element.tagName != "LI")
    element = element.parentNode;
    // more fun with IE, sometimes event.target is empty, just ignore it then
    if(!element)
    return [];
    return element;
    }

    function moveSelect(step) {
    listItems.slice(active, active + 1).removeClass(CLASSES.ACTIVE);
    movePosition(step);
    var activeItem = listItems.slice(active, active + 1).addClass(CLASSES.ACTIVE);
    if(options.scroll) {
    var offset = 0;
    listItems.slice(0, active).each(function() {
    offset += this.offsetHeight;
    });
    if((offset + activeItem[0].offsetHeight - list.scrollTop()) > list[0].clientHeight) {
    list.scrollTop(offset + activeItem[0].offsetHeight - list.innerHeight());
    } else if(offset < list.scrollTop()) {
    list.scrollTop(offset);
    }
    }
    };

    function movePosition(step) {
    if (options.scrollJumpPosition || (!options.scrollJumpPosition && !((step < 0 && active == 0) || (step > 0 && active == listItems.size() - 1)) )) {
    active += step;
    if (active < 0) {
    active = listItems.size() - 1;
    } else if (active >= listItems.size()) {
    active = 0;
    }
    }
    }


    function limitNumberOfItems(available) {
    return options.max && options.max < available
    ? options.max
    : available;
    }

    function fillList() {
    list.empty();
    var max = limitNumberOfItems(data.length);
    for (var i=0; i < max; i++) {
    if (!data[i])
    continue;
    var formatted = options.formatItem(data[i].data, i+1, max, data[i].value, term);
    if ( formatted === false )
    continue;
    var li = $("<li/>").html( options.highlight(formatted, term) ).addClass(i%2 == 0 ? "ac_even" : "ac_odd").appendTo(list)[0];
    $.data(li, "ac_data", data[i]);
    }
    listItems = list.find("li");
    if ( options.selectFirst ) {
    listItems.slice(0, 1).addClass(CLASSES.ACTIVE);
    active = 0;
    }
    // apply bgiframe if available
    if ( $.fn.bgiframe )
    list.bgiframe();
    }

    return {
    display: function(d, q) {
    init();
    data = d;
    term = q;
    fillList();
    },
    next: function() {
    moveSelect(1);
    },
    prev: function() {
    moveSelect(-1);
    },
    pageUp: function() {
    if (active != 0 && active - 8 < 0) {
    moveSelect( -active );
    } else {
    moveSelect(-8);
    }
    },
    pageDown: function() {
    if (active != listItems.size() - 1 && active + 8 > listItems.size()) {
    moveSelect( listItems.size() - 1 - active );
    } else {
    moveSelect(8);
    }
    },
    hide: function() {
    element && element.hide();
    listItems && listItems.removeClass(CLASSES.ACTIVE);
    active = -1;
    },
    visible : function() {
    return element && element.is(":visible");
    },
    current: function() {
    return this.visible() && (listItems.filter("." + CLASSES.ACTIVE)[0] || options.selectFirst && listItems[0]);
    },
    show: function() {
    var offset = $(input).offset();
    element.css({
    width: typeof options.width == "string" || options.width > 0 ? options.width : $(input).width(),
    top: offset.top + input.offsetHeight,
    left: offset.left - 9
    }).show();
    if(options.scroll) {
    list.scrollTop(0);
    list.css({
    maxHeight: options.scrollHeight,
    overflow: 'auto'
    });

    if(navigator.userAgent.indexOf("MSIE") != -1 && typeof document.body.style.maxHeight === "undefined") {
    var listHeight = 0;
    listItems.each(function() {
    listHeight += this.offsetHeight;
    });
    var scrollbarsVisible = listHeight > options.scrollHeight;
    list.css('height', scrollbarsVisible ? options.scrollHeight : listHeight );
    if (!scrollbarsVisible) {
    // IE doesn't recalculate width when scrollbar disappears
    listItems.width( list.width() - parseInt(listItems.css("padding-left")) - parseInt(listItems.css("padding-right")) );
    }
    }

    }
    },
    selected: function() {
    var selected = listItems && listItems.filter("." + CLASSES.ACTIVE).removeClass(CLASSES.ACTIVE);
    return selected && selected.length && $.data(selected[0], "ac_data");
    },
    emptyList: function (){
    list && list.empty();
    },
    unbind: function() {
    element && element.remove();
    }
    };
    };

    $.fn.selection = function(start, end) {
    if (start !== undefined) {
    return this.each(function() {
    if( this.createTextRange ){
    var selRange = this.createTextRange();
    if (end === undefined || start == end) {
    selRange.move("character", start);
    selRange.select();
    } else {
    selRange.collapse(true);
    selRange.moveStart("character", start);
    selRange.moveEnd("character", end);
    selRange.select();
    }
    } else if( this.setSelectionRange ){
    this.setSelectionRange(start, end);
    } else if( this.selectionStart ){
    this.selectionStart = start;
    this.selectionEnd = end;
    }
    });
    }
    var field = this[0];
    if ( field.createTextRange ) {
    var range = document.selection.createRange(),
    orig = field.value,
    teststring = "<->",
    textLength = range.text.length;
    range.text = teststring;
    var caretAt = field.value.indexOf(teststring);
    field.value = orig;
    this.selection(caretAt, caretAt + textLength);
    return {
    start: caretAt,
    end: caretAt + textLength
    }
    } else if( field.selectionStart !== undefined ){
    return {
    start: field.selectionStart,
    end: field.selectionEnd
    }
    }
    };

    })(jQuery);