719 lines
22 KiB
JavaScript
719 lines
22 KiB
JavaScript
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/*
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* jQuery Plugin: Tokenizing Autocomplete Text Entry
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* Version 1.4.2
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*
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* Copyright (c) 2009 James Smith (http://loopj.com)
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* Licensed jointly under the GPL and MIT licenses,
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* choose which one suits your project best!
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*
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*/
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(function ($) {
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// Default settings
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var DEFAULT_SETTINGS = {
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hintText: "Type in a search term",
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noResultsText: "No results",
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searchingText: "Searching...",
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deleteText: "×",
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searchDelay: 300,
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minChars: 1,
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tokenLimit: null,
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jsonContainer: null,
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method: "GET",
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contentType: "json",
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queryParam: "q",
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tokenDelimiter: ",",
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preventDuplicates: false,
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prePopulate: null,
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animateDropdown: true,
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onResult: null,
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onAdd: null,
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onDelete: null
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};
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// Default classes to use when theming
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var DEFAULT_CLASSES = {
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tokenList: "token-input-list",
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token: "token-input-token",
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tokenDelete: "token-input-delete-token",
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selectedToken: "token-input-selected-token",
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highlightedToken: "token-input-highlighted-token",
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dropdown: "token-input-dropdown",
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dropdownItem: "token-input-dropdown-item",
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dropdownItem2: "token-input-dropdown-item2",
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selectedDropdownItem: "token-input-selected-dropdown-item",
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inputToken: "token-input-input-token"
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};
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// Input box position "enum"
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var POSITION = {
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BEFORE: 0,
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AFTER: 1,
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END: 2
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};
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// Keys "enum"
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var KEY = {
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BACKSPACE: 8,
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TAB: 9,
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ENTER: 13,
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ESCAPE: 27,
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SPACE: 32,
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PAGE_UP: 33,
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PAGE_DOWN: 34,
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END: 35,
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HOME: 36,
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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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NUMPAD_ENTER: 108,
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COMMA: 188
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};
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// Expose the .tokenInput function to jQuery as a plugin
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$.fn.tokenInput = function (url_or_data, options) {
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var settings = $.extend({}, DEFAULT_SETTINGS, options || {});
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return this.each(function () {
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new $.TokenList(this, url_or_data, settings);
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});
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};
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// TokenList class for each input
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$.TokenList = function (input, url_or_data, settings) {
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//
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// Initialization
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//
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// Configure the data source
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if($.type(url_or_data) === "string") {
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// Set the url to query against
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settings.url = url_or_data;
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// Make a smart guess about cross-domain if it wasn't explicitly specified
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if(settings.crossDomain === undefined) {
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if(settings.url.indexOf("://") === -1) {
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settings.crossDomain = false;
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} else {
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settings.crossDomain = (location.href.split(/\/+/g)[1] !== settings.url.split(/\/+/g)[1]);
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}
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}
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} else if($.type(url_or_data) === "array") {
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// Set the local data to search through
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settings.local_data = url_or_data;
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}
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// Build class names
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if(settings.classes) {
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// Use custom class names
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settings.classes = $.extend({}, DEFAULT_CLASSES, settings.classes);
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} else if(settings.theme) {
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// Use theme-suffixed default class names
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settings.classes = {};
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$.each(DEFAULT_CLASSES, function(key, value) {
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settings.classes[key] = value + "-" + settings.theme;
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});
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} else {
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settings.classes = DEFAULT_CLASSES;
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}
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// Save the tokens
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var saved_tokens = [];
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// Keep track of the number of tokens in the list
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var token_count = 0;
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// Basic cache to save on db hits
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var cache = new $.TokenList.Cache();
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// Keep track of the timeout, old vals
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var timeout;
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var input_val;
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// Create a new text input an attach keyup events
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var input_box = $("<input type=\"text\" autocomplete=\"off\">")
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.css({
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outline: "none"
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})
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.focus(function () {
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if (settings.tokenLimit === null || settings.tokenLimit !== token_count) {
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show_dropdown_hint();
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}
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})
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.blur(function () {
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hide_dropdown();
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})
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.bind("keyup keydown blur update", resize_input)
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.keydown(function (event) {
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var previous_token;
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var next_token;
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switch(event.keyCode) {
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case KEY.LEFT:
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case KEY.RIGHT:
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case KEY.UP:
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case KEY.DOWN:
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if(!$(this).val()) {
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previous_token = input_token.prev();
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next_token = input_token.next();
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if((previous_token.length && previous_token.get(0) === selected_token) || (next_token.length && next_token.get(0) === selected_token)) {
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// Check if there is a previous/next token and it is selected
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if(event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) {
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deselect_token($(selected_token), POSITION.BEFORE);
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} else {
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deselect_token($(selected_token), POSITION.AFTER);
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}
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} else if((event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) && previous_token.length) {
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// We are moving left, select the previous token if it exists
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select_token($(previous_token.get(0)));
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} else if((event.keyCode === KEY.RIGHT || event.keyCode === KEY.DOWN) && next_token.length) {
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// We are moving right, select the next token if it exists
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select_token($(next_token.get(0)));
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}
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} else {
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var dropdown_item = null;
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if(event.keyCode === KEY.DOWN || event.keyCode === KEY.RIGHT) {
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dropdown_item = $(selected_dropdown_item).next();
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} else {
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dropdown_item = $(selected_dropdown_item).prev();
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}
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if(dropdown_item.length) {
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select_dropdown_item(dropdown_item);
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}
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return false;
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}
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break;
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case KEY.BACKSPACE:
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previous_token = input_token.prev();
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if(!$(this).val().length) {
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if(selected_token) {
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delete_token($(selected_token));
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} else if(previous_token.length) {
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select_token($(previous_token.get(0)));
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}
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return false;
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} else if($(this).val().length === 1) {
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hide_dropdown();
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} else {
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// set a timeout just long enough to let this function finish.
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setTimeout(function(){do_search();}, 5);
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}
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break;
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case KEY.TAB:
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case KEY.ENTER:
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case KEY.NUMPAD_ENTER:
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case KEY.COMMA:
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if(selected_dropdown_item) {
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add_token($(selected_dropdown_item));
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return false;
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}
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break;
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case KEY.ESCAPE:
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hide_dropdown();
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return true;
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default:
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if(String.fromCharCode(event.which)) {
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// set a timeout just long enough to let this function finish.
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setTimeout(function(){do_search();}, 5);
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}
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break;
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}
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});
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// Keep a reference to the original input box
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var hidden_input = $(input)
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.hide()
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.val("")
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.focus(function () {
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input_box.focus();
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})
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.blur(function () {
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input_box.blur();
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});
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// Keep a reference to the selected token and dropdown item
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var selected_token = null;
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var selected_dropdown_item = null;
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// The list to store the token items in
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var token_list = $("<ul />")
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.addClass(settings.classes.tokenList)
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.click(function (event) {
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var li = $(event.target).closest("li");
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if(li && li.get(0) && $.data(li.get(0), "tokeninput")) {
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toggle_select_token(li);
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} else {
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// Deselect selected token
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if(selected_token) {
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deselect_token($(selected_token), POSITION.END);
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}
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// Focus input box
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input_box.focus();
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}
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})
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.mouseover(function (event) {
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var li = $(event.target).closest("li");
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if(li && selected_token !== this) {
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li.addClass(settings.classes.highlightedToken);
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}
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})
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.mouseout(function (event) {
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var li = $(event.target).closest("li");
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if(li && selected_token !== this) {
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li.removeClass(settings.classes.highlightedToken);
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}
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})
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.insertBefore(hidden_input);
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// The token holding the input box
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var input_token = $("<li />")
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.addClass(settings.classes.inputToken)
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.appendTo(token_list)
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.append(input_box);
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// The list to store the dropdown items in
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var dropdown = $("<div>")
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.addClass(settings.classes.dropdown)
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.appendTo("body")
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.hide();
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// Magic element to help us resize the text input
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var input_resizer = $("<tester/>")
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.insertAfter(input_box)
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.css({
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position: "absolute",
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top: -9999,
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left: -9999,
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width: "auto",
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fontSize: input_box.css("fontSize"),
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fontFamily: input_box.css("fontFamily"),
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fontWeight: input_box.css("fontWeight"),
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letterSpacing: input_box.css("letterSpacing"),
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whiteSpace: "nowrap"
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});
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// Pre-populate list if items exist
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hidden_input.val("");
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li_data = settings.prePopulate || hidden_input.data("pre");
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if(li_data && li_data.length) {
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$.each(li_data, function (index, value) {
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insert_token(value.id, value.name);
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});
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}
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//
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// Private functions
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//
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function resize_input() {
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if(input_val === (input_val = input_box.val())) {return;}
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// Enter new content into resizer and resize input accordingly
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var escaped = input_val.replace(/&/g, '&').replace(/\s/g,' ').replace(/</g, '<').replace(/>/g, '>');
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input_resizer.html(escaped);
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input_box.width(input_resizer.width() + 30);
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}
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function is_printable_character(keycode) {
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return ((keycode >= 48 && keycode <= 90) || // 0-1a-z
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(keycode >= 96 && keycode <= 111) || // numpad 0-9 + - / * .
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(keycode >= 186 && keycode <= 192) || // ; = , - . / ^
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(keycode >= 219 && keycode <= 222)); // ( \ ) '
|
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}
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// Inner function to a token to the list
|
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function insert_token(id, value) {
|
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var this_token = $("<li><p>"+ value +"</p> </li>")
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.addClass(settings.classes.token)
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.insertBefore(input_token);
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// The 'delete token' button
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$("<span>" + settings.deleteText + "</span>")
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.addClass(settings.classes.tokenDelete)
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.appendTo(this_token)
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.click(function () {
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delete_token($(this).parent());
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return false;
|
||
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});
|
||
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// Store data on the token
|
||
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var token_data = {"id": id, "name": value};
|
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$.data(this_token.get(0), "tokeninput", token_data);
|
||
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||
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// Save this token for duplicate checking
|
||
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saved_tokens.push(token_data);
|
||
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|
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// Update the hidden input
|
||
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var token_ids = $.map(saved_tokens, function (el) {
|
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return el.id;
|
||
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});
|
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hidden_input.val(token_ids.join(settings.tokenDelimiter));
|
||
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token_count += 1;
|
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return this_token;
|
||
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}
|
||
|
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|
||
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// Add a token to the token list based on user input
|
||
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function add_token (item) {
|
||
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var li_data = $.data(item.get(0), "tokeninput");
|
||
|
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var callback = settings.onAdd;
|
||
|
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|
||
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// See if the token already exists and select it if we don't want duplicates
|
||
|
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if(token_count > 0 && settings.preventDuplicates) {
|
||
|
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var found_existing_token = null;
|
||
|
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token_list.children().each(function () {
|
||
|
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var existing_token = $(this);
|
||
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var existing_data = $.data(existing_token.get(0), "tokeninput");
|
||
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if(existing_data && existing_data.id === li_data.id) {
|
||
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found_existing_token = existing_token;
|
||
|
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return false;
|
||
|
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}
|
||
|
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});
|
||
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|
||
|
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if(found_existing_token) {
|
||
|
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select_token(found_existing_token);
|
||
|
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input_token.insertAfter(found_existing_token);
|
||
|
|
input_box.focus();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Insert the new tokens
|
||
|
|
insert_token(li_data.id, li_data.name);
|
||
|
|
|
||
|
|
// Check the token limit
|
||
|
|
if(settings.tokenLimit !== null && token_count >= settings.tokenLimit) {
|
||
|
|
input_box.hide();
|
||
|
|
hide_dropdown();
|
||
|
|
return;
|
||
|
|
} else {
|
||
|
|
input_box.focus();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Clear input box
|
||
|
|
input_box.val("");
|
||
|
|
|
||
|
|
// Don't show the help dropdown, they've got the idea
|
||
|
|
hide_dropdown();
|
||
|
|
|
||
|
|
// Execute the onAdd callback if defined
|
||
|
|
if($.isFunction(callback)) {
|
||
|
|
callback(li_data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Select a token in the token list
|
||
|
|
function select_token (token) {
|
||
|
|
token.addClass(settings.classes.selectedToken);
|
||
|
|
selected_token = token.get(0);
|
||
|
|
|
||
|
|
// Hide input box
|
||
|
|
input_box.val("");
|
||
|
|
|
||
|
|
// Hide dropdown if it is visible (eg if we clicked to select token)
|
||
|
|
hide_dropdown();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Deselect a token in the token list
|
||
|
|
function deselect_token (token, position) {
|
||
|
|
token.removeClass(settings.classes.selectedToken);
|
||
|
|
selected_token = null;
|
||
|
|
|
||
|
|
if(position === POSITION.BEFORE) {
|
||
|
|
input_token.insertBefore(token);
|
||
|
|
} else if(position === POSITION.AFTER) {
|
||
|
|
input_token.insertAfter(token);
|
||
|
|
} else {
|
||
|
|
input_token.appendTo(token_list);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Show the input box and give it focus again
|
||
|
|
input_box.focus();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Toggle selection of a token in the token list
|
||
|
|
function toggle_select_token(token) {
|
||
|
|
var previous_selected_token = selected_token;
|
||
|
|
|
||
|
|
if(selected_token) {
|
||
|
|
deselect_token($(selected_token), POSITION.END);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(previous_selected_token === token.get(0)) {
|
||
|
|
deselect_token(token, POSITION.END);
|
||
|
|
} else {
|
||
|
|
select_token(token);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Delete a token from the token list
|
||
|
|
function delete_token (token) {
|
||
|
|
// Remove the id from the saved list
|
||
|
|
var token_data = $.data(token.get(0), "tokeninput");
|
||
|
|
var callback = settings.onDelete;
|
||
|
|
|
||
|
|
// Delete the token
|
||
|
|
token.remove();
|
||
|
|
selected_token = null;
|
||
|
|
|
||
|
|
// Show the input box and give it focus again
|
||
|
|
input_box.focus();
|
||
|
|
|
||
|
|
// Remove this token from the saved list
|
||
|
|
saved_tokens = $.grep(saved_tokens, function (val) {
|
||
|
|
return (val.id !== token_data.id);
|
||
|
|
});
|
||
|
|
|
||
|
|
// Update the hidden input
|
||
|
|
var token_ids = $.map(saved_tokens, function (el) {
|
||
|
|
return el.id;
|
||
|
|
});
|
||
|
|
hidden_input.val(token_ids.join(settings.tokenDelimiter));
|
||
|
|
|
||
|
|
token_count -= 1;
|
||
|
|
|
||
|
|
if(settings.tokenLimit !== null) {
|
||
|
|
input_box
|
||
|
|
.show()
|
||
|
|
.val("")
|
||
|
|
.focus();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Execute the onDelete callback if defined
|
||
|
|
if($.isFunction(callback)) {
|
||
|
|
callback(token_data);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Hide and clear the results dropdown
|
||
|
|
function hide_dropdown () {
|
||
|
|
dropdown.hide().empty();
|
||
|
|
selected_dropdown_item = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
function show_dropdown() {
|
||
|
|
dropdown
|
||
|
|
.css({
|
||
|
|
position: "absolute",
|
||
|
|
top: $(token_list).offset().top + $(token_list).outerHeight(),
|
||
|
|
left: $(token_list).offset().left,
|
||
|
|
zindex: 999
|
||
|
|
})
|
||
|
|
.show();
|
||
|
|
}
|
||
|
|
|
||
|
|
function show_dropdown_searching () {
|
||
|
|
if(settings.searchingText) {
|
||
|
|
dropdown.html("<p>"+settings.searchingText+"</p>");
|
||
|
|
show_dropdown();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function show_dropdown_hint () {
|
||
|
|
if(settings.hintText) {
|
||
|
|
dropdown.html("<p>"+settings.hintText+"</p>");
|
||
|
|
show_dropdown();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Highlight the query part of the search term
|
||
|
|
function highlight_term(value, term) {
|
||
|
|
return value.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + term + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<b>$1</b>");
|
||
|
|
}
|
||
|
|
|
||
|
|
// Populate the results dropdown with some results
|
||
|
|
function populate_dropdown (query, results) {
|
||
|
|
if(results && results.length) {
|
||
|
|
dropdown.empty();
|
||
|
|
var dropdown_ul = $("<ul>")
|
||
|
|
.appendTo(dropdown)
|
||
|
|
.mouseover(function (event) {
|
||
|
|
select_dropdown_item($(event.target).closest("li"));
|
||
|
|
})
|
||
|
|
.mousedown(function (event) {
|
||
|
|
add_token($(event.target).closest("li"));
|
||
|
|
return false;
|
||
|
|
})
|
||
|
|
.hide();
|
||
|
|
|
||
|
|
$.each(results, function(index, value) {
|
||
|
|
var this_li = $("<li>" + highlight_term(value.name, query) + "</li>")
|
||
|
|
.appendTo(dropdown_ul);
|
||
|
|
|
||
|
|
if(index % 2) {
|
||
|
|
this_li.addClass(settings.classes.dropdownItem);
|
||
|
|
} else {
|
||
|
|
this_li.addClass(settings.classes.dropdownItem2);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(index === 0) {
|
||
|
|
select_dropdown_item(this_li);
|
||
|
|
}
|
||
|
|
|
||
|
|
$.data(this_li.get(0), "tokeninput", {"id": value.id, "name": value.name});
|
||
|
|
});
|
||
|
|
|
||
|
|
show_dropdown();
|
||
|
|
|
||
|
|
if(settings.animateDropdown) {
|
||
|
|
dropdown_ul.slideDown("fast");
|
||
|
|
} else {
|
||
|
|
dropdown_ul.show();
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if(settings.noResultsText) {
|
||
|
|
dropdown.html("<p>"+settings.noResultsText+"</p>");
|
||
|
|
show_dropdown();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Highlight an item in the results dropdown
|
||
|
|
function select_dropdown_item (item) {
|
||
|
|
if(item) {
|
||
|
|
if(selected_dropdown_item) {
|
||
|
|
deselect_dropdown_item($(selected_dropdown_item));
|
||
|
|
}
|
||
|
|
|
||
|
|
item.addClass(settings.classes.selectedDropdownItem);
|
||
|
|
selected_dropdown_item = item.get(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Remove highlighting from an item in the results dropdown
|
||
|
|
function deselect_dropdown_item (item) {
|
||
|
|
item.removeClass(settings.classes.selectedDropdownItem);
|
||
|
|
selected_dropdown_item = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Do a search and show the "searching" dropdown if the input is longer
|
||
|
|
// than settings.minChars
|
||
|
|
function do_search() {
|
||
|
|
var query = input_box.val().toLowerCase();
|
||
|
|
|
||
|
|
if(query && query.length) {
|
||
|
|
if(selected_token) {
|
||
|
|
deselect_token($(selected_token), POSITION.AFTER);
|
||
|
|
}
|
||
|
|
|
||
|
|
if(query.length >= settings.minChars) {
|
||
|
|
show_dropdown_searching();
|
||
|
|
clearTimeout(timeout);
|
||
|
|
|
||
|
|
timeout = setTimeout(function(){
|
||
|
|
run_search(query);
|
||
|
|
}, settings.searchDelay);
|
||
|
|
} else {
|
||
|
|
hide_dropdown();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Do the actual search
|
||
|
|
function run_search(query) {
|
||
|
|
var cached_results = cache.get(query);
|
||
|
|
if(cached_results) {
|
||
|
|
populate_dropdown(query, cached_results);
|
||
|
|
} else {
|
||
|
|
// Are we doing an ajax search or local data search?
|
||
|
|
if(settings.url) {
|
||
|
|
// Extract exisiting get params
|
||
|
|
var ajax_params = {};
|
||
|
|
ajax_params.data = {};
|
||
|
|
if(settings.url.indexOf("?") > -1) {
|
||
|
|
var parts = settings.url.split("?");
|
||
|
|
ajax_params.url = parts[0];
|
||
|
|
|
||
|
|
var param_array = parts[1].split("&");
|
||
|
|
$.each(param_array, function (index, value) {
|
||
|
|
var kv = value.split("=");
|
||
|
|
ajax_params.data[kv[0]] = kv[1];
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
ajax_params.url = settings.url;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Prepare the request
|
||
|
|
ajax_params.data[settings.queryParam] = query;
|
||
|
|
ajax_params.type = settings.method;
|
||
|
|
ajax_params.dataType = settings.contentType;
|
||
|
|
if(settings.crossDomain) {
|
||
|
|
ajax_params.dataType = "jsonp";
|
||
|
|
}
|
||
|
|
|
||
|
|
// Attach the success callback
|
||
|
|
ajax_params.success = function(results) {
|
||
|
|
if($.isFunction(settings.onResult)) {
|
||
|
|
results = settings.onResult.call(this, results);
|
||
|
|
}
|
||
|
|
cache.add(query, settings.jsonContainer ? results[settings.jsonContainer] : results);
|
||
|
|
|
||
|
|
// only populate the dropdown if the results are associated with the active search query
|
||
|
|
if(input_box.val().toLowerCase() === query) {
|
||
|
|
populate_dropdown(query, settings.jsonContainer ? results[settings.jsonContainer] : results);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Make the request
|
||
|
|
$.ajax(ajax_params);
|
||
|
|
} else if(settings.local_data) {
|
||
|
|
// Do the search through local data
|
||
|
|
var results = $.grep(settings.local_data, function (row) {
|
||
|
|
return row.name.toLowerCase().indexOf(query.toLowerCase()) > -1;
|
||
|
|
});
|
||
|
|
|
||
|
|
populate_dropdown(query, results);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
// Really basic cache for the results
|
||
|
|
$.TokenList.Cache = function (options) {
|
||
|
|
var settings = $.extend({
|
||
|
|
max_size: 500
|
||
|
|
}, options);
|
||
|
|
|
||
|
|
var data = {};
|
||
|
|
var size = 0;
|
||
|
|
|
||
|
|
var flush = function () {
|
||
|
|
data = {};
|
||
|
|
size = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
this.add = function (query, results) {
|
||
|
|
if(size > settings.max_size) {
|
||
|
|
flush();
|
||
|
|
}
|
||
|
|
|
||
|
|
if(!data[query]) {
|
||
|
|
size += 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
data[query] = results;
|
||
|
|
};
|
||
|
|
|
||
|
|
this.get = function (query) {
|
||
|
|
return data[query];
|
||
|
|
};
|
||
|
|
};
|
||
|
|
}(jQuery));
|