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@todc
Created July 6, 2012 19:06
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jQuery Tokeninput plugin with modifications by @todc
/*
* jQuery Plugin: Tokenizing Autocomplete Text Entry
* Version 1.6.0
*
* Copyright (c) 2009 James Smith (http://loopj.com)
* Licensed jointly under the GPL and MIT licenses,
* choose which one suits your project best!
*
*/
(function ($) {
// Default settings
var DEFAULT_SETTINGS = {
// Search settings
method: "GET",
contentType: "json",
queryParam: "q",
searchDelay: 300,
minChars: 1,
propertyToSearch: "name",
jsonContainer: null,
// Display settings
hintText: "Type in a search term",
noResultsText: "No results",
searchingText: "Searching...",
deleteText: "×",
animateDropdown: true,
// Tokenization settings
tokenLimit: null,
tokenDelimiter: ",",
preventDuplicates: false,
// Output settings
tokenValue: "id",
// Prepopulation settings
prePopulate: null,
processPrePopulate: false,
// Manipulation settings
idPrefix: "token-input-",
// Formatters
resultsFormatter: function(item){ return "<li>" + item[this.propertyToSearch]+ "</li>" },
tokenFormatter: function(item) { return "<li><p>" + item[this.propertyToSearch] + "</p></li>" },
// Callbacks
onResult: null,
onAdd: null,
onDelete: null,
onReady: null
};
// Default classes to use when theming
var DEFAULT_CLASSES = {
tokenList: "token-input-list",
token: "token-input-token",
tokenDelete: "token-input-delete-token",
selectedToken: "token-input-selected-token",
highlightedToken: "token-input-highlighted-token",
dropdown: "token-input-dropdown",
dropdownItem: "token-input-dropdown-item",
dropdownItem2: "token-input-dropdown-item2",
selectedDropdownItem: "token-input-selected-dropdown-item",
inputToken: "token-input-input-token"
};
// Input box position "enum"
var POSITION = {
BEFORE: 0,
AFTER: 1,
END: 2
};
// Keys "enum"
var KEY = {
BACKSPACE: 8,
TAB: 9,
ENTER: 13,
ESCAPE: 27,
SPACE: 32,
PAGE_UP: 33,
PAGE_DOWN: 34,
END: 35,
HOME: 36,
LEFT: 37,
UP: 38,
RIGHT: 39,
DOWN: 40,
NUMPAD_ENTER: 108,
COMMA: 188
};
// Additional public (exposed) methods
var methods = {
init: function(url_or_data_or_function, options) {
var settings = $.extend({}, DEFAULT_SETTINGS, options || {});
return this.each(function () {
$(this).data("tokenInputObject", new $.TokenList(this, url_or_data_or_function, settings));
});
},
clear: function() {
this.data("tokenInputObject").clear();
return this;
},
add: function(item) {
this.data("tokenInputObject").add(item);
return this;
},
remove: function(item) {
this.data("tokenInputObject").remove(item);
return this;
},
get: function() {
return this.data("tokenInputObject").getTokens();
}
}
// Expose the .tokenInput function to jQuery as a plugin
$.fn.tokenInput = function (method) {
// Method calling and initialization logic
if(methods[method]) {
return methods[method].apply(this, Array.prototype.slice.call(arguments, 1));
} else {
return methods.init.apply(this, arguments);
}
};
// TokenList class for each input
$.TokenList = function (input, url_or_data, settings) {
//
// Initialization
//
// Configure the data source
if($.type(url_or_data) === "string" || $.type(url_or_data) === "function") {
// Set the url to query against
settings.url = url_or_data;
// If the URL is a function, evaluate it here to do our initalization work
var url = computeURL();
// Make a smart guess about cross-domain if it wasn't explicitly specified
if(settings.crossDomain === undefined) {
if(url.indexOf("://") === -1) {
settings.crossDomain = false;
} else {
settings.crossDomain = (location.href.split(/\/+/g)[1] !== url.split(/\/+/g)[1]);
}
}
} else if(typeof(url_or_data) === "object") {
// Set the local data to search through
settings.local_data = url_or_data;
}
// Build class names
if(settings.classes) {
// Use custom class names
settings.classes = $.extend({}, DEFAULT_CLASSES, settings.classes);
} else if(settings.theme) {
// Use theme-suffixed default class names
settings.classes = {};
$.each(DEFAULT_CLASSES, function(key, value) {
settings.classes[key] = value + "-" + settings.theme;
});
} else {
settings.classes = DEFAULT_CLASSES;
}
// Save the tokens
var saved_tokens = [];
// Keep track of the number of tokens in the list
var token_count = 0;
// Basic cache to save on db hits
var cache = new $.TokenList.Cache();
// Keep track of the timeout, old vals
var timeout;
var input_val;
// Create a new text input an attach keyup events
var input_box = $("<input type=\"text\" autocomplete=\"off\">")
.css({
outline: "none"
})
.attr("id", settings.idPrefix + input.id)
.focus(function () {
token_list.addClass("token-input-focus");
if (settings.tokenLimit === null || settings.tokenLimit !== token_count) {
show_dropdown_hint();
}
})
.blur(function () {
token_list.removeClass("token-input-focus");
hide_dropdown();
$(this).val("");
})
.bind("keyup keydown blur update", resize_input)
.keydown(function (event) {
var previous_token;
var next_token;
switch(event.keyCode) {
case KEY.LEFT:
case KEY.RIGHT:
case KEY.UP:
case KEY.DOWN:
if(!$(this).val()) {
previous_token = input_token.prev();
next_token = input_token.next();
if((previous_token.length && previous_token.get(0) === selected_token) || (next_token.length && next_token.get(0) === selected_token)) {
// Check if there is a previous/next token and it is selected
if(event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) {
deselect_token($(selected_token), POSITION.BEFORE);
} else {
deselect_token($(selected_token), POSITION.AFTER);
}
} else if((event.keyCode === KEY.LEFT || event.keyCode === KEY.UP) && previous_token.length) {
// We are moving left, select the previous token if it exists
select_token($(previous_token.get(0)));
} else if((event.keyCode === KEY.RIGHT || event.keyCode === KEY.DOWN) && next_token.length) {
// We are moving right, select the next token if it exists
select_token($(next_token.get(0)));
}
} else {
var dropdown_item = null;
if(event.keyCode === KEY.DOWN || event.keyCode === KEY.RIGHT) {
dropdown_item = $(selected_dropdown_item).next();
} else {
dropdown_item = $(selected_dropdown_item).prev();
}
if(dropdown_item.length) {
select_dropdown_item(dropdown_item);
}
return false;
}
break;
case KEY.BACKSPACE:
previous_token = input_token.prev();
if(!$(this).val().length) {
if(selected_token) {
delete_token($(selected_token));
hidden_input.change();
} else if(previous_token.length) {
select_token($(previous_token.get(0)));
}
return false;
} else if($(this).val().length === 1) {
hide_dropdown();
} else {
// set a timeout just long enough to let this function finish.
setTimeout(function(){do_search();}, 5);
}
break;
case KEY.TAB:
case KEY.ENTER:
case KEY.NUMPAD_ENTER:
case KEY.COMMA:
if(selected_dropdown_item) {
add_token($(selected_dropdown_item).data("tokeninput"));
hidden_input.change();
return false;
}
break;
case KEY.ESCAPE:
hide_dropdown();
return true;
default:
if(String.fromCharCode(event.which)) {
// set a timeout just long enough to let this function finish.
setTimeout(function(){do_search();}, 5);
}
break;
}
});
// Keep a reference to the original input box
var hidden_input = $(input)
.hide()
.val("")
.focus(function () {
input_box.focus();
})
.blur(function () {
input_box.blur();
});
// Keep a reference to the selected token and dropdown item
var selected_token = null;
var selected_token_index = 0;
var selected_dropdown_item = null;
// The list to store the token items in
var token_list = $("<ul />")
.addClass(settings.classes.tokenList)
.click(function (event) {
var li = $(event.target).closest("li");
if(li && li.get(0) && $.data(li.get(0), "tokeninput")) {
toggle_select_token(li);
} else {
// Deselect selected token
if(selected_token) {
deselect_token($(selected_token), POSITION.END);
}
// Focus input box
input_box.focus();
}
})
.mouseover(function (event) {
var li = $(event.target).closest("li");
if(li && selected_token !== this) {
li.addClass(settings.classes.highlightedToken);
}
})
.mouseout(function (event) {
var li = $(event.target).closest("li");
if(li && selected_token !== this) {
li.removeClass(settings.classes.highlightedToken);
}
})
.insertBefore(hidden_input);
// The token holding the input box
var input_token = $("<li />")
.addClass(settings.classes.inputToken)
.appendTo(token_list)
.append(input_box);
// The list to store the dropdown items in
// TIMO: append next to input element
token_list.parent().css("position", "relative");
var dropdown = $("<div>")
.addClass(settings.classes.dropdown)
.appendTo(token_list.parent()) // was: .appendTo("body")
.hide();
// Magic element to help us resize the text input
var input_resizer = $("<tester/>")
.insertAfter(input_box)
.css({
position: "absolute",
top: -9999,
left: -9999,
width: "auto",
fontSize: input_box.css("fontSize"),
fontFamily: input_box.css("fontFamily"),
fontWeight: input_box.css("fontWeight"),
letterSpacing: input_box.css("letterSpacing"),
whiteSpace: "nowrap"
});
// Pre-populate list if items exist
hidden_input.val("");
var li_data = settings.prePopulate || hidden_input.data("pre");
if(settings.processPrePopulate && $.isFunction(settings.onResult)) {
li_data = settings.onResult.call(hidden_input, li_data);
}
if(li_data && li_data.length) {
$.each(li_data, function (index, value) {
insert_token(value);
checkTokenLimit();
});
}
// Initialization is done
if($.isFunction(settings.onReady)) {
settings.onReady.call();
}
//
// Public functions
//
this.clear = function() {
token_list.children("li").each(function() {
if ($(this).children("input").length === 0) {
delete_token($(this));
}
});
}
this.add = function(item) {
add_token(item);
}
this.remove = function(item) {
token_list.children("li").each(function() {
if ($(this).children("input").length === 0) {
var currToken = $(this).data("tokeninput");
var match = true;
for (var prop in item) {
if (item[prop] !== currToken[prop]) {
match = false;
break;
}
}
if (match) {
delete_token($(this));
}
}
});
}
this.getTokens = function() {
return saved_tokens;
}
//
// Private functions
//
function checkTokenLimit() {
if(settings.tokenLimit !== null && token_count >= settings.tokenLimit) {
input_box.hide();
hide_dropdown();
return;
}
}
function resize_input() {
if(input_val === (input_val = input_box.val())) {return;}
// Enter new content into resizer and resize input accordingly
var escaped = input_val.replace(/&/g, '&amp;').replace(/\s/g,' ').replace(/</g, '&lt;').replace(/>/g, '&gt;');
input_resizer.html(escaped);
input_box.width(input_resizer.width() + 30);
}
function is_printable_character(keycode) {
return ((keycode >= 48 && keycode <= 90) || // 0-1a-z
(keycode >= 96 && keycode <= 111) || // numpad 0-9 + - / * .
(keycode >= 186 && keycode <= 192) || // ; = , - . / ^
(keycode >= 219 && keycode <= 222)); // ( \ ) '
}
// Inner function to a token to the list
function insert_token(item) {
var this_token = settings.tokenFormatter(item);
this_token = $(this_token)
.addClass(settings.classes.token)
.insertBefore(input_token);
// The 'delete token' button
$("<span>" + settings.deleteText + "</span>")
.addClass(settings.classes.tokenDelete)
.appendTo(this_token)
.click(function () {
delete_token($(this).parent());
hidden_input.change();
return false;
});
// Store data on the token
var token_data = {"id": item.id};
token_data[settings.propertyToSearch] = item[settings.propertyToSearch];
$.data(this_token.get(0), "tokeninput", item);
// Save this token for duplicate checking
saved_tokens = saved_tokens.slice(0,selected_token_index).concat([token_data]).concat(saved_tokens.slice(selected_token_index));
selected_token_index++;
// Update the hidden input
update_hidden_input(saved_tokens, hidden_input);
token_count += 1;
// Check the token limit
if(settings.tokenLimit !== null && token_count >= settings.tokenLimit) {
input_box.hide();
hide_dropdown();
}
return this_token;
}
// Add a token to the token list based on user input
function add_token (item) {
var callback = settings.onAdd;
// See if the token already exists and select it if we don't want duplicates
if(token_count > 0 && settings.preventDuplicates) {
var found_existing_token = null;
token_list.children().each(function () {
var existing_token = $(this);
var existing_data = $.data(existing_token.get(0), "tokeninput");
if(existing_data && existing_data.id === item.id) {
found_existing_token = existing_token;
return false;
}
});
if(found_existing_token) {
select_token(found_existing_token);
input_token.insertAfter(found_existing_token);
input_box.focus();
return;
}
}
// Insert the new tokens
if(settings.tokenLimit == null || token_count < settings.tokenLimit) {
insert_token(item);
checkTokenLimit();
}
// Clear input box
input_box.val("");
// Don't show the help dropdown, they've got the idea
hide_dropdown();
// Execute the onAdd callback if defined
if($.isFunction(callback)) {
callback.call(hidden_input,item);
}
}
// 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);
selected_token_index--;
} else if(position === POSITION.AFTER) {
input_token.insertAfter(token);
selected_token_index++;
} else {
input_token.appendTo(token_list);
selected_token_index = token_count;
}
// 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 = $.data(token.get(0), "tokeninput");
var callback = settings.onDelete;
var index = token.prevAll().length;
if(index > selected_token_index) index--;
// Delete the token
token.remove();
selected_token = null;
// Show the input box and give it focus again
input_box.focus();
// Remove this token from the saved list
saved_tokens = saved_tokens.slice(0,index).concat(saved_tokens.slice(index+1));
if(index < selected_token_index) selected_token_index--;
// Update the hidden input
update_hidden_input(saved_tokens, hidden_input);
token_count -= 1;
if(settings.tokenLimit !== null) {
input_box
.show()
.val("")
.focus();
}
// Execute the onDelete callback if defined
if($.isFunction(callback)) {
callback.call(hidden_input,token_data);
}
}
// Update the hidden input box value
function update_hidden_input(saved_tokens, hidden_input) {
var token_values = $.map(saved_tokens, function (el) {
return el[settings.tokenValue];
});
hidden_input.val(token_values.join(settings.tokenDelimiter));
}
// Hide and clear the results dropdown
function hide_dropdown () {
dropdown.hide().empty();
selected_dropdown_item = null;
}
function show_dropdown() {
dropdown
// TIMO: handled in css
/*
.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>");
}
function find_value_and_highlight_term(template, value, term) {
return template.replace(new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + value + ")(?![^<>]*>)(?![^&;]+;)", "g"), highlight_term(value, term));
}
// 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").data("tokeninput"));
hidden_input.change();
return false;
})
.hide();
$.each(results, function(index, value) {
var this_li = settings.resultsFormatter(value);
this_li = find_value_and_highlight_term(this_li ,value[settings.propertyToSearch], query);
this_li = $(this_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);
}
$.data(this_li.get(0), "tokeninput", value);
});
show_dropdown();
if(settings.animateDropdown) {
dropdown_ul.slideDown("fast");
} else {
dropdown_ul.show();
}
} else {
if(settings.noResultsText) {
dropdown.html("<p>"+settings.noResultsText+"</p>");
show_dropdown();
}
}
}
// Highlight an item in the results dropdown
function select_dropdown_item (item) {
if(item) {
if(selected_dropdown_item) {
deselect_dropdown_item($(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 cache_key = query + computeURL();
var cached_results = cache.get(cache_key);
if(cached_results) {
populate_dropdown(query, cached_results);
} else {
// Are we doing an ajax search or local data search?
if(settings.url) {
var url = computeURL();
// Extract exisiting get params
var ajax_params = {};
ajax_params.data = {};
if(url.indexOf("?") > -1) {
var parts = url.split("?");
ajax_params.url = parts[0];
var param_array = parts[1].split("&");
$.each(param_array, function (index, value) {
var kv = value.split("=");
ajax_params.data[kv[0]] = kv[1];
});
} else {
ajax_params.url = url;
}
// Prepare the request
ajax_params.data[settings.queryParam] = query;
ajax_params.type = settings.method;
ajax_params.dataType = settings.contentType;
if(settings.crossDomain) {
ajax_params.dataType = "jsonp";
}
// Attach the success callback
ajax_params.success = function(results) {
if($.isFunction(settings.onResult)) {
results = settings.onResult.call(hidden_input, results);
}
cache.add(cache_key, 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 = $.grep(settings.local_data, function (row) {
return row[settings.propertyToSearch].toLowerCase().indexOf(query.toLowerCase()) > -1;
});
if($.isFunction(settings.onResult)) {
results = settings.onResult.call(hidden_input, results);
}
cache.add(cache_key, results);
populate_dropdown(query, results);
}
}
}
// compute the dynamic URL
function computeURL() {
var url = settings.url;
if(typeof settings.url == 'function') {
url = settings.url.call();
}
return url;
}
};
// 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));
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