mirror of
https://github.com/devbridge/jQuery-Autocomplete.git
synced 2024-12-23 11:28:53 +00:00
824 lines
26 KiB
JavaScript
824 lines
26 KiB
JavaScript
/**
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* Ajax Autocomplete for jQuery, version 1.2.9
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* (c) 2013 Tomas Kirda
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*
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* Ajax Autocomplete for jQuery is freely distributable under the terms of an MIT-style license.
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* For details, see the web site: https://github.com/devbridge/jQuery-Autocomplete
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*
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*/
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/*jslint browser: true, white: true, plusplus: true */
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/*global define, window, document, jQuery */
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// Expose plugin as an AMD module if AMD loader is present:
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(function (factory) {
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'use strict';
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if (typeof define === 'function' && define.amd) {
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// AMD. Register as an anonymous module.
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define(['jquery'], factory);
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} else {
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// Browser globals
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factory(jQuery);
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}
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}(function ($) {
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'use strict';
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var
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utils = (function () {
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return {
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escapeRegExChars: function (value) {
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return value.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
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},
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createNode: function (containerClass) {
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var div = document.createElement('div');
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div.className = containerClass;
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div.style.position = 'absolute';
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div.style.display = 'none';
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return div;
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}
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};
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}()),
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keys = {
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ESC: 27,
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TAB: 9,
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RETURN: 13,
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LEFT: 37,
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UP: 38,
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RIGHT: 39,
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DOWN: 40
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};
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function Autocomplete(el, options) {
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var noop = function () { },
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that = this,
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defaults = {
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autoSelectFirst: false,
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appendTo: 'body',
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serviceUrl: null,
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lookup: null,
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onSelect: null,
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width: 'auto',
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minChars: 1,
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maxHeight: 300,
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deferRequestBy: 0,
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params: {},
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formatResult: Autocomplete.formatResult,
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delimiter: null,
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zIndex: 9999,
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type: 'GET',
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noCache: false,
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onSearchStart: noop,
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onSearchComplete: noop,
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onSearchError: noop,
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containerClass: 'autocomplete-suggestions',
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tabDisabled: false,
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dataType: 'text',
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currentRequest: null,
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triggerSelectOnValidInput: true,
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lookupFilter: function (suggestion, originalQuery, queryLowerCase) {
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return suggestion.value.toLowerCase().indexOf(queryLowerCase) !== -1;
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},
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paramName: 'query',
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transformResult: function (response) {
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return typeof response === 'string' ? $.parseJSON(response) : response;
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}
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};
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// Shared variables:
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that.element = el;
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that.el = $(el);
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that.suggestions = [];
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that.badQueries = [];
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that.selectedIndex = -1;
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that.currentValue = that.element.value;
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that.intervalId = 0;
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that.cachedResponse = {};
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that.onChangeInterval = null;
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that.onChange = null;
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that.isLocal = false;
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that.suggestionsContainer = null;
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that.options = $.extend({}, defaults, options);
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that.classes = {
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selected: 'autocomplete-selected',
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suggestion: 'autocomplete-suggestion'
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};
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that.hint = null;
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that.hintValue = '';
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that.selection = null;
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// Initialize and set options:
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that.initialize();
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that.setOptions(options);
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}
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Autocomplete.utils = utils;
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$.Autocomplete = Autocomplete;
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Autocomplete.formatResult = function (suggestion, currentValue) {
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var pattern = '(' + utils.escapeRegExChars(currentValue) + ')';
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return suggestion.value.replace(new RegExp(pattern, 'gi'), '<strong>$1<\/strong>');
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};
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Autocomplete.prototype = {
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killerFn: null,
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initialize: function () {
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var that = this,
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suggestionSelector = '.' + that.classes.suggestion,
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selected = that.classes.selected,
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options = that.options,
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container;
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// Remove autocomplete attribute to prevent native suggestions:
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that.element.setAttribute('autocomplete', 'off');
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that.killerFn = function (e) {
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if ($(e.target).closest('.' + that.options.containerClass).length === 0) {
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that.killSuggestions();
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that.disableKillerFn();
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}
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};
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that.suggestionsContainer = Autocomplete.utils.createNode(options.containerClass);
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container = $(that.suggestionsContainer);
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container.appendTo(options.appendTo);
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// Only set width if it was provided:
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if (options.width !== 'auto') {
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container.width(options.width);
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}
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// Listen for mouse over event on suggestions list:
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container.on('mouseover.autocomplete', suggestionSelector, function () {
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that.activate($(this).data('index'));
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});
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// Deselect active element when mouse leaves suggestions container:
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container.on('mouseout.autocomplete', function () {
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that.selectedIndex = -1;
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container.children('.' + selected).removeClass(selected);
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});
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// Listen for click event on suggestions list:
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container.on('click.autocomplete', suggestionSelector, function () {
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that.select($(this).data('index'));
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});
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that.fixPosition();
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that.fixPositionCapture = function () {
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if (that.visible) {
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that.fixPosition();
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}
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};
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$(window).on('resize.autocomplete', that.fixPositionCapture);
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that.el.on('keydown.autocomplete', function (e) { that.onKeyPress(e); });
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that.el.on('keyup.autocomplete', function (e) { that.onKeyUp(e); });
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that.el.on('blur.autocomplete', function () { that.onBlur(); });
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that.el.on('focus.autocomplete', function () { that.onFocus(); });
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that.el.on('change.autocomplete', function (e) { that.onKeyUp(e); });
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},
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onFocus: function () {
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var that = this;
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that.fixPosition();
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if (that.options.minChars <= that.el.val().length) {
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that.onValueChange();
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}
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},
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onBlur: function () {
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this.enableKillerFn();
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},
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setOptions: function (suppliedOptions) {
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var that = this,
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options = that.options;
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$.extend(options, suppliedOptions);
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that.isLocal = $.isArray(options.lookup);
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if (that.isLocal) {
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options.lookup = that.verifySuggestionsFormat(options.lookup);
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}
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// Adjust height, width and z-index:
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$(that.suggestionsContainer).css({
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'max-height': options.maxHeight + 'px',
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'width': options.width + 'px',
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'z-index': options.zIndex
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});
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},
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clearCache: function () {
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this.cachedResponse = {};
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this.badQueries = [];
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},
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clear: function () {
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this.clearCache();
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this.currentValue = '';
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this.suggestions = [];
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},
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disable: function () {
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var that = this;
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that.disabled = true;
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if (that.currentRequest) {
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that.currentRequest.abort();
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}
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},
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enable: function () {
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this.disabled = false;
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},
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fixPosition: function () {
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var that = this,
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offset,
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styles;
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// Don't adjsut position if custom container has been specified:
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if (that.options.appendTo !== 'body') {
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return;
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}
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offset = that.el.offset();
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styles = {
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top: (offset.top + that.el.outerHeight()) + 'px',
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left: offset.left + 'px'
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};
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if (that.options.width === 'auto') {
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styles.width = (that.el.outerWidth() - 2) + 'px';
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}
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$(that.suggestionsContainer).css(styles);
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},
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enableKillerFn: function () {
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var that = this;
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$(document).on('click.autocomplete', that.killerFn);
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},
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disableKillerFn: function () {
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var that = this;
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$(document).off('click.autocomplete', that.killerFn);
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},
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killSuggestions: function () {
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var that = this;
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that.stopKillSuggestions();
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that.intervalId = window.setInterval(function () {
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that.hide();
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that.stopKillSuggestions();
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}, 50);
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},
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stopKillSuggestions: function () {
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window.clearInterval(this.intervalId);
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},
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isCursorAtEnd: function () {
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var that = this,
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valLength = that.el.val().length,
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selectionStart = that.element.selectionStart,
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range;
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if (typeof selectionStart === 'number') {
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return selectionStart === valLength;
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}
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if (document.selection) {
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range = document.selection.createRange();
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range.moveStart('character', -valLength);
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return valLength === range.text.length;
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}
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return true;
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},
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onKeyPress: function (e) {
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var that = this;
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// If suggestions are hidden and user presses arrow down, display suggestions:
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if (!that.disabled && !that.visible && e.which === keys.DOWN && that.currentValue) {
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that.suggest();
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return;
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}
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if (that.disabled || !that.visible) {
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return;
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}
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switch (e.which) {
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case keys.ESC:
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that.el.val(that.currentValue);
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that.hide();
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break;
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case keys.RIGHT:
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if (that.hint && that.options.onHint && that.isCursorAtEnd()) {
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that.selectHint();
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break;
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}
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return;
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case keys.TAB:
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if (that.hint && that.options.onHint) {
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that.selectHint();
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return;
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}
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// Fall through to RETURN
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case keys.RETURN:
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if (that.selectedIndex === -1) {
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that.hide();
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return;
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}
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that.select(that.selectedIndex);
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if (e.which === keys.TAB && that.options.tabDisabled === false) {
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return;
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}
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break;
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case keys.UP:
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that.moveUp();
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break;
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case keys.DOWN:
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that.moveDown();
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break;
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default:
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return;
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}
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// Cancel event if function did not return:
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e.stopImmediatePropagation();
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e.preventDefault();
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},
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onKeyUp: function (e) {
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var that = this;
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if (that.disabled) {
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return;
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}
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switch (e.which) {
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case keys.UP:
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case keys.DOWN:
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return;
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}
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clearInterval(that.onChangeInterval);
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if (that.currentValue !== that.el.val()) {
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that.findBestHint();
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if (that.options.deferRequestBy > 0) {
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// Defer lookup in case when value changes very quickly:
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that.onChangeInterval = setInterval(function () {
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that.onValueChange();
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}, that.options.deferRequestBy);
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} else {
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that.onValueChange();
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}
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}
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},
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onValueChange: function () {
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var that = this,
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options = that.options,
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value = that.el.val(),
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query = that.getQuery(value),
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index;
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if (that.selection) {
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that.selection = null;
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(options.onInvalidateSelection || $.noop).call(that.element);
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}
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clearInterval(that.onChangeInterval);
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that.currentValue = value;
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that.selectedIndex = -1;
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// Check existing suggestion for the match before proceeding:
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if (options.triggerSelectOnValidInput) {
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index = that.findSuggestionIndex(query);
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if (index !== -1) {
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that.select(index);
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return;
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}
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}
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if (query.length < options.minChars) {
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that.hide();
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} else {
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that.getSuggestions(query);
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}
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},
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findSuggestionIndex: function (query) {
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var that = this,
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index = -1,
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queryLowerCase = query.toLowerCase();
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$.each(that.suggestions, function (i, suggestion) {
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if (suggestion.value.toLowerCase() === queryLowerCase) {
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index = i;
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return false;
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}
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});
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return index;
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},
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getQuery: function (value) {
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var delimiter = this.options.delimiter,
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parts;
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if (!delimiter) {
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return value;
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}
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parts = value.split(delimiter);
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return $.trim(parts[parts.length - 1]);
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},
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getSuggestionsLocal: function (query) {
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var that = this,
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options = that.options,
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queryLowerCase = query.toLowerCase(),
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filter = options.lookupFilter,
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limit = parseInt(options.lookupLimit, 10),
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data;
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data = {
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suggestions: $.grep(options.lookup, function (suggestion) {
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return filter(suggestion, query, queryLowerCase);
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})
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};
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if (limit && data.suggestions.length > limit) {
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data.suggestions = data.suggestions.slice(0, limit);
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}
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return data;
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},
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getSuggestions: function (q) {
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var response,
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that = this,
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options = that.options,
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serviceUrl = options.serviceUrl,
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data,
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cacheKey;
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options.params[options.paramName] = q;
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data = options.ignoreParams ? null : options.params;
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if (that.isLocal) {
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response = that.getSuggestionsLocal(q);
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} else {
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if ($.isFunction(serviceUrl)) {
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serviceUrl = serviceUrl.call(that.element, q);
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}
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cacheKey = serviceUrl + '?' + $.param(data || {});
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response = that.cachedResponse[cacheKey];
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}
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if (response && $.isArray(response.suggestions)) {
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that.suggestions = response.suggestions;
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that.suggest();
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} else if (!that.isBadQuery(q)) {
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if (options.onSearchStart.call(that.element, options.params) === false) {
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return;
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}
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if (that.currentRequest) {
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that.currentRequest.abort();
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}
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that.currentRequest = $.ajax({
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url: serviceUrl,
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data: data,
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type: options.type,
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dataType: options.dataType
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}).done(function (data) {
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that.currentRequest = null;
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that.processResponse(data, q, cacheKey);
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options.onSearchComplete.call(that.element, q);
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}).fail(function (jqXHR, textStatus, errorThrown) {
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options.onSearchError.call(that.element, q, jqXHR, textStatus, errorThrown);
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});
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}
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},
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isBadQuery: function (q) {
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var badQueries = this.badQueries,
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i = badQueries.length;
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while (i--) {
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if (q.indexOf(badQueries[i]) === 0) {
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return true;
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}
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}
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return false;
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},
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hide: function () {
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var that = this;
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that.visible = false;
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that.selectedIndex = -1;
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$(that.suggestionsContainer).hide();
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that.signalHint(null);
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},
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suggest: function () {
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if (this.suggestions.length === 0) {
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this.hide();
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return;
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}
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var that = this,
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options = that.options,
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formatResult = options.formatResult,
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value = that.getQuery(that.currentValue),
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className = that.classes.suggestion,
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classSelected = that.classes.selected,
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container = $(that.suggestionsContainer),
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beforeRender = options.beforeRender,
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html = '',
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index,
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width;
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|
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if (options.triggerSelectOnValidInput) {
|
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index = that.findSuggestionIndex(value);
|
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if (index !== -1) {
|
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that.select(index);
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return;
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}
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}
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// Build suggestions inner HTML:
|
|
$.each(that.suggestions, function (i, suggestion) {
|
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html += '<div class="' + className + '" data-index="' + i + '">' + formatResult(suggestion, value) + '</div>';
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});
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// If width is auto, adjust width before displaying suggestions,
|
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// because if instance was created before input had width, it will be zero.
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|
// Also it adjusts if input width has changed.
|
|
// -2px to account for suggestions border.
|
|
if (options.width === 'auto') {
|
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width = that.el.outerWidth() - 2;
|
|
container.width(width > 0 ? width : 300);
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|
}
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|
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container.html(html);
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|
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// Select first value by default:
|
|
if (options.autoSelectFirst) {
|
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that.selectedIndex = 0;
|
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container.children().first().addClass(classSelected);
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}
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|
|
if ($.isFunction(beforeRender)) {
|
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beforeRender.call(that.element, container);
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}
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|
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container.show();
|
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that.visible = true;
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|
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that.findBestHint();
|
|
},
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|
|
|
findBestHint: function () {
|
|
var that = this,
|
|
value = that.el.val().toLowerCase(),
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|
bestMatch = null;
|
|
|
|
if (!value) {
|
|
return;
|
|
}
|
|
|
|
$.each(that.suggestions, function (i, suggestion) {
|
|
var foundMatch = suggestion.value.toLowerCase().indexOf(value) === 0;
|
|
if (foundMatch) {
|
|
bestMatch = suggestion;
|
|
}
|
|
return !foundMatch;
|
|
});
|
|
|
|
that.signalHint(bestMatch);
|
|
},
|
|
|
|
signalHint: function (suggestion) {
|
|
var hintValue = '',
|
|
that = this;
|
|
if (suggestion) {
|
|
hintValue = that.currentValue + suggestion.value.substr(that.currentValue.length);
|
|
}
|
|
if (that.hintValue !== hintValue) {
|
|
that.hintValue = hintValue;
|
|
that.hint = suggestion;
|
|
(this.options.onHint || $.noop)(hintValue);
|
|
}
|
|
},
|
|
|
|
verifySuggestionsFormat: function (suggestions) {
|
|
// If suggestions is string array, convert them to supported format:
|
|
if (suggestions.length && typeof suggestions[0] === 'string') {
|
|
return $.map(suggestions, function (value) {
|
|
return { value: value, data: null };
|
|
});
|
|
}
|
|
|
|
return suggestions;
|
|
},
|
|
|
|
processResponse: function (response, originalQuery, cacheKey) {
|
|
var that = this,
|
|
options = that.options,
|
|
result = options.transformResult(response, originalQuery);
|
|
|
|
result.suggestions = that.verifySuggestionsFormat(result.suggestions);
|
|
|
|
// Cache results if cache is not disabled:
|
|
if (!options.noCache) {
|
|
that.cachedResponse[cacheKey] = result;
|
|
if (result.suggestions.length === 0) {
|
|
that.badQueries.push(cacheKey);
|
|
}
|
|
}
|
|
|
|
// Return if originalQuery is not matching current query:
|
|
if (originalQuery !== that.getQuery(that.currentValue)) {
|
|
return;
|
|
}
|
|
|
|
that.suggestions = result.suggestions;
|
|
that.suggest();
|
|
},
|
|
|
|
activate: function (index) {
|
|
var that = this,
|
|
activeItem,
|
|
selected = that.classes.selected,
|
|
container = $(that.suggestionsContainer),
|
|
children = container.children();
|
|
|
|
container.children('.' + selected).removeClass(selected);
|
|
|
|
that.selectedIndex = index;
|
|
|
|
if (that.selectedIndex !== -1 && children.length > that.selectedIndex) {
|
|
activeItem = children.get(that.selectedIndex);
|
|
$(activeItem).addClass(selected);
|
|
return activeItem;
|
|
}
|
|
|
|
return null;
|
|
},
|
|
|
|
selectHint: function () {
|
|
var that = this,
|
|
i = $.inArray(that.hint, that.suggestions);
|
|
|
|
that.select(i);
|
|
},
|
|
|
|
select: function (i) {
|
|
var that = this;
|
|
that.hide();
|
|
that.onSelect(i);
|
|
},
|
|
|
|
moveUp: function () {
|
|
var that = this;
|
|
|
|
if (that.selectedIndex === -1) {
|
|
return;
|
|
}
|
|
|
|
if (that.selectedIndex === 0) {
|
|
$(that.suggestionsContainer).children().first().removeClass(that.classes.selected);
|
|
that.selectedIndex = -1;
|
|
that.el.val(that.currentValue);
|
|
that.findBestHint();
|
|
return;
|
|
}
|
|
|
|
that.adjustScroll(that.selectedIndex - 1);
|
|
},
|
|
|
|
moveDown: function () {
|
|
var that = this;
|
|
|
|
if (that.selectedIndex === (that.suggestions.length - 1)) {
|
|
return;
|
|
}
|
|
|
|
that.adjustScroll(that.selectedIndex + 1);
|
|
},
|
|
|
|
adjustScroll: function (index) {
|
|
var that = this,
|
|
activeItem = that.activate(index),
|
|
offsetTop,
|
|
upperBound,
|
|
lowerBound,
|
|
heightDelta = 25;
|
|
|
|
if (!activeItem) {
|
|
return;
|
|
}
|
|
|
|
offsetTop = activeItem.offsetTop;
|
|
upperBound = $(that.suggestionsContainer).scrollTop();
|
|
lowerBound = upperBound + that.options.maxHeight - heightDelta;
|
|
|
|
if (offsetTop < upperBound) {
|
|
$(that.suggestionsContainer).scrollTop(offsetTop);
|
|
} else if (offsetTop > lowerBound) {
|
|
$(that.suggestionsContainer).scrollTop(offsetTop - that.options.maxHeight + heightDelta);
|
|
}
|
|
|
|
that.el.val(that.getValue(that.suggestions[index].value));
|
|
that.signalHint(null);
|
|
},
|
|
|
|
onSelect: function (index) {
|
|
var that = this,
|
|
onSelectCallback = that.options.onSelect,
|
|
suggestion = that.suggestions[index];
|
|
|
|
that.currentValue = that.getValue(suggestion.value);
|
|
that.el.val(that.currentValue);
|
|
that.signalHint(null);
|
|
that.suggestions = [];
|
|
that.selection = suggestion;
|
|
|
|
if ($.isFunction(onSelectCallback)) {
|
|
onSelectCallback.call(that.element, suggestion);
|
|
}
|
|
},
|
|
|
|
getValue: function (value) {
|
|
var that = this,
|
|
delimiter = that.options.delimiter,
|
|
currentValue,
|
|
parts;
|
|
|
|
if (!delimiter) {
|
|
return value;
|
|
}
|
|
|
|
currentValue = that.currentValue;
|
|
parts = currentValue.split(delimiter);
|
|
|
|
if (parts.length === 1) {
|
|
return value;
|
|
}
|
|
|
|
return currentValue.substr(0, currentValue.length - parts[parts.length - 1].length) + value;
|
|
},
|
|
|
|
dispose: function () {
|
|
var that = this;
|
|
that.el.off('.autocomplete').removeData('autocomplete');
|
|
that.disableKillerFn();
|
|
$(window).off('resize.autocomplete', that.fixPositionCapture);
|
|
$(that.suggestionsContainer).remove();
|
|
}
|
|
};
|
|
|
|
// Create chainable jQuery plugin:
|
|
$.fn.autocomplete = function (options, args) {
|
|
var dataKey = 'autocomplete';
|
|
// If function invoked without argument return
|
|
// instance of the first matched element:
|
|
if (arguments.length === 0) {
|
|
return this.first().data(dataKey);
|
|
}
|
|
|
|
return this.each(function () {
|
|
var inputElement = $(this),
|
|
instance = inputElement.data(dataKey);
|
|
|
|
if (typeof options === 'string') {
|
|
if (instance && typeof instance[options] === 'function') {
|
|
instance[options](args);
|
|
}
|
|
} else {
|
|
// If instance already exists, destroy it:
|
|
if (instance && instance.dispose) {
|
|
instance.dispose();
|
|
}
|
|
instance = new Autocomplete(this, options);
|
|
inputElement.data(dataKey, instance);
|
|
}
|
|
});
|
|
};
|
|
}));
|