(function ($) {
"use strict";
var defaultOptions = {
tagClass: function(item) {
return 'label label-info';
},
itemValue: function(item) {
return item ? item.toString() : item;
},
itemText: function(item) {
return this.itemValue(item);
},
freeInput: true,
addOnBlur: true,
maxTags: undefined,
maxChars: undefined,
confirmKeys: [13, 44],
onTagExists: function(item, $tag) {
$tag.hide().fadeIn();
},
trimValue: false,
allowDuplicates: false
};
/**
* Constructor function
*/
function TagsInput(element, options) {
this.itemsArray = [];
this.$element = $(element);
this.$element.hide();
this.isSelect = (element.tagName === 'SELECT');
this.multiple = (this.isSelect && element.hasAttribute('multiple'));
this.objectItems = options && options.itemValue;
this.placeholderText = element.hasAttribute('placeholder') ? this.$element.attr('placeholder') : '';
this.inputSize = Math.max(1, this.placeholderText.length);
this.$container = $('<div class="bootstrap-tagsinput"></div>');
this.$input = $('<input type="text" placeholder="' + this.placeholderText + '"/>').appendTo(this.$container);
this.$element.after(this.$container);
var inputWidth = (this.inputSize < 3 ? 3 : this.inputSize) + "em";
this.$input.get(0).style.cssText = "width: " + inputWidth + " !important;";
this.build(options);
}
TagsInput.prototype = {
constructor: TagsInput,
/**
* Adds the given item as a new tag. Pass true to dontPushVal to prevent
* updating the elements val()
*/
add: function(item, dontPushVal) {
var self = this;
if (self.options.maxTags && self.itemsArray.length >= self.options.maxTags)
return;
// Ignore falsey values, except false
if (item !== false && !item)
return;
// Trim value
if (typeof item === "string" && self.options.trimValue) {
item = $.trim(item);
}
// Throw an error when trying to add an object while the itemValue option was not set
if (typeof item === "object" && !self.objectItems)
throw("Can't add objects when itemValue option is not set");
// Ignore strings only containg whitespace
if (item.toString().match(/^\s*$/))
return;
// If SELECT but not multiple, remove current tag
if (self.isSelect && !self.multiple && self.itemsArray.length > 0)
self.remove(self.itemsArray[0]);
if (typeof item === "string" && this.$element[0].tagName === 'INPUT') {
var items = item.split(',');
if (items.length > 1) {
for (var i = 0; i < items.length; i++) {
this.add(items[i], true);
}
if (!dontPushVal)
self.pushVal();
return;
}
}
// raise beforeItemAdd arg
var beforeItemAddEvent = $.Event('beforeItemAdd', { item: item, cancel: false });
self.$element.trigger(beforeItemAddEvent);
if (beforeItemAddEvent.cancel)
return;
item = beforeItemAddEvent.item
var itemValue = self.options.itemValue(item),
itemText = self.options.itemText(item),
tagClass = self.options.tagClass(item);
// Ignore items allready added
var existing = $.grep(self.itemsArray, function(item) { return self.options.itemValue(item) === itemValue; } )[0];
if (existing && !self.options.allowDuplicates) {
// Invoke onTagExists
if (self.options.onTagExists) {
var $existingTag = $(".tag", self.$container).filter(function() { return $(this).data("item") === existing; });
self.options.onTagExists(item, $existingTag);
}
return;
}
// if length greater than limit
if (self.items().toString().length + item.length + 1 > self.options.maxInputLength)
return;
// register item in internal array and map
self.itemsArray.push(item);
// add a tag element
var $tag = $('<span class="tag ' + htmlEncode(tagClass) + '">' + htmlEncode(itemText) + '<span data-role="remove"></span></span>');
$tag.data('item', item);
self.findInputWrapper().before($tag);
$tag.after(' ');
// add <option /> if item represents a value not present in one of the <select />'s options
if (self.isSelect && !$('option[value="' + encodeURIComponent(itemValue) + '"]',self.$element)[0]) {
var $option = $('<option selected>' + htmlEncode(itemText) + '</option>');
$option.data('item', item);
$option.attr('value', itemValue);
self.$element.append($option);
}
if (!dontPushVal)
self.pushVal();
// Add class when reached maxTags
if (self.options.maxTags === self.itemsArray.length || self.items().toString().length === self.options.maxInputLength)
self.$container.addClass('bootstrap-tagsinput-max');
self.$element.trigger($.Event('itemAdded', { item: item }));
},
/**
* Removes the given item. Pass true to dontPushVal to prevent updating the
* elements val()
*/
remove: function(item, dontPushVal) {
var self = this;
if (self.objectItems) {
if (typeof item === "object")
item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) == self.options.itemValue(item); } );
else
item = $.grep(self.itemsArray, function(other) { return self.options.itemValue(other) == item; } );
item = item[item.length-1];
}
if (item) {
var beforeItemRemoveEvent = $.Event('beforeItemRemove', { item: item, cancel: false });
self.$element.trigger(beforeItemRemoveEvent);
if (beforeItemRemoveEvent.cancel)
return;
$('.tag', self.$container).filter(function() { return $(this).data('item') === item; }).remove();
$('option', self.$element).filter(function() { return $(this).data('item') === item; }).remove();
if($.inArray(item, self.itemsArray) !== -1)
self.itemsArray.splice($.inArray(item, self.itemsArray), 1);
}
if (!dontPushVal)
self.pushVal();
// Remove class when reached maxTags
if (self.options.maxTags > self.itemsArray.length)
self.$container.removeClass('bootstrap-tagsinput-max');
self.$element.trigger($.Event('itemRemoved', { item: item }));
},
/**
* Removes all items
*/
removeAll: function() {
var self = this;
$('.tag', self.$container).remove();
$('option', self.$element).remove();
while(self.itemsArray.length > 0)
self.itemsArray.pop();
self.pushVal();
},
/**
* Refreshes the tags so they match the text/value of their corresponding
* item.
*/
refresh: function() {
var self = this;
$('.tag', self.$container).each(function() {
var $tag = $(this),
item = $tag.data('item'),
itemValue = self.options.itemValue(item),
itemText = self.options.itemText(item),
tagClass = self.options.tagClass(item);
// Update tag's class and inner text
$tag.attr('class', null);
$tag.addClass('tag ' + htmlEncode(tagClass));
$tag.contents().filter(function() {
return this.nodeType == 3;
})[0].nodeValue = htmlEncode(itemText);
if (self.isSelect) {
var option = $('option', self.$element).filter(function() { return $(this).data('item') === item; });
option.attr('value', itemValue);
}
});
},
/**
* Returns the items added as tags
*/
items: function() {
return this.itemsArray;
},
/**
* Assembly value by retrieving the value of each item, and set it on the
* element.
*/
pushVal: function() {
var self = this,
val = $.map(self.items(), function(item) {
return self.options.itemValue(item).toString();
});
self.$element.val(val, true).trigger('change');
},
/**
* Initializes the tags input behaviour on the element
*/
build: function(options) {
var self = this;
self.options = $.extend({}, defaultOptions, options);
// When itemValue is set, freeInput should always be false
if (self.objectItems)
self.options.freeInput = false;
makeOptionItemFunction(self.options, 'itemValue');
makeOptionItemFunction(self.options, 'itemText');
makeOptionFunction(self.options, 'tagClass');
// Typeahead Bootstrap version 2.3.2
if (self.options.typeahead) {
var typeahead = self.options.typeahead || {};
makeOptionFunction(typeahead, 'source');
self.$input.typeahead($.extend({}, typeahead, {
source: function (query, process) {
function processItems(items) {
var texts = [];
for (var i = 0; i < items.length; i++) {
var text = self.options.itemText(items[i]);
map[text] = items[i];
texts.push(text);
}
process(texts);
}
this.map = {};
var map = this.map,
data = typeahead.source(query);
if ($.isFunction(data.success)) {
// support for Angular callbacks
data.success(processItems);
} else if ($.isFunction(data.then)) {
// support for Angular promises
data.then(processItems);
} else {
// support for functions and jquery promises
$.when(data)
.then(processItems);
}
},
updater: function (text) {
self.add(this.map[text]);
},
matcher: function (text) {
return (text.toLowerCase().indexOf(this.query.trim().toLowerCase()) !== -1);
},
sorter: function (texts) {
return texts.sort();
},
highlighter: function (text) {
var regex = new RegExp( '(' + this.query + ')', 'gi' );
return text.replace( regex, "<strong>$1</strong>" );
}
}));
}
// typeahead.js
if (self.options.typeaheadjs) {
var typeaheadjs = self.options.typeaheadjs || {};
self.$input.typeahead(null, typeaheadjs).on('typeahead:selected', $.proxy(function (obj, datum) {
if (typeaheadjs.valueKey)
self.add(datum[typeaheadjs.valueKey]);
else
self.add(datum);
self.$input.typeahead('val', '');
}, self));
}
self.$container.on('click', $.proxy(function(event) {
if (! self.$element.attr('disabled')) {
self.$input.removeAttr('disabled');
}
self.$input.focus();
}, self));
if (self.options.addOnBlur && self.options.freeInput) {
self.$input.on('focusout', $.proxy(function(event) {
// HACK: only process on focusout when no typeahead opened, to
// avoid adding the typeahead text as tag
if ($('.typeahead, .twitter-typeahead', self.$container).length === 0) {
self.add(self.$input.val());
self.$input.val('');
}
}, self));
}
self.$container.on('keydown', 'input', $.proxy(function(event) {
var $input = $(event.target),
$inputWrapper = self.findInputWrapper();
if (self.$element.attr('disabled')) {
self.$input.attr('disabled', 'disabled');
return;
}
switch (event.which) {
// BACKSPACE
case 8:
if (doGetCaretPosition($input[0]) === 0) {
var prev = $inputWrapper.prev();
if (prev) {
self.remove(prev.data('item'));
}
}
break;
// DELETE
case 46:
if (doGetCaretPosition($input[0]) === 0) {
var next = $inputWrapper.next();
if (next) {
self.remove(next.data('item'));
}
}
break;
// LEFT ARROW
case 37:
// Try to move the input before the previous tag
var $prevTag = $inputWrapper.prev();
if ($input.val().length === 0 && $prevTag[0]) {
$prevTag.before($inputWrapper);
$input.focus();
}
break;
// RIGHT ARROW
case 39:
// Try to move the input after the next tag
var $nextTag = $inputWrapper.next();
if ($input.val().length === 0 && $nextTag[0]) {
$nextTag.after($inputWrapper);
$input.focus();
}
break;
default:
// ignore
}
// Reset internal input's size
var textLength = $input.val().length,
wordSpace = Math.ceil(textLength / 5),
size = textLength + wordSpace + 1;
$input.attr('size', Math.max(this.inputSize, $input.val().length));
}, self));
self.$container.on('keypress', 'input', $.proxy(function(event) {
var $input = $(event.target);
if (self.$element.attr('disabled')) {
self.$input.attr('disabled', 'disabled');
return;
}
var text = $input.val(),
maxLengthReached = self.options.maxChars && text.length >= self.options.maxChars;
if (self.options.freeInput && (keyCombinationInList(event, self.options.confirmKeys) || maxLengthReached)) {
self.add(maxLengthReached ? text.substr(0, self.options.maxChars) : text);
$input.val('');
event.preventDefault();
}
// Reset internal input's size
var textLength = $input.val().length,
wordSpace = Math.ceil(textLength / 5),
size = textLength + wordSpace + 1;
$input.attr('size', Math.max(this.inputSize, $input.val().length));
}, self));
// Remove icon clicked
self.$container.on('click', '[data-role=remove]', $.proxy(function(event) {
if (self.$element.attr('disabled')) {
return;
}
self.remove($(event.target).closest('.tag').data('item'));
}, self));
// Only add existing value as tags when using strings as tags
if (self.options.itemValue === defaultOptions.itemValue) {
if (self.$element[0].tagName === 'INPUT') {
self.add(self.$element.val());
} else {
$('option', self.$element).each(function() {
self.add($(this).attr('value'), true);
});
}
}
},
/**
* Removes all tagsinput behaviour and unregsiter all event handlers
*/
destroy: function() {
var self = this;
// Unbind events
self.$container.off('keypress', 'input');
self.$container.off('click', '[role=remove]');
self.$container.remove();
self.$element.removeData('tagsinput');
self.$element.show();
},
/**
* Sets focus on the tagsinput
*/
focus: function() {
this.$input.focus();
},
/**
* Returns the internal input element
*/
input: function() {
return this.$input;
},
/**
* Returns the element which is wrapped around the internal input. This
* is normally the $container, but typeahead.js moves the $input element.
*/
findInputWrapper: function() {
var elt = this.$input[0],
container = this.$container[0];
while(elt && elt.parentNode !== container)
elt = elt.parentNode;
return $(elt);
}
};
/**
* Register JQuery plugin
*/
$.fn.tagsinput = function(arg1, arg2) {
var results = [];
this.each(function() {
var tagsinput = $(this).data('tagsinput');
// Initialize a new tags input
if (!tagsinput) {
tagsinput = new TagsInput(this, arg1);
$(this).data('tagsinput', tagsinput);
results.push(tagsinput);
if (this.tagName === 'SELECT') {
$('option', $(this)).attr('selected', 'selected');
}
// Init tags from $(this).val()
$(this).val($(this).val());
} else if (!arg1 && !arg2) {
// tagsinput already exists
// no function, trying to init
results.push(tagsinput);
} else if(tagsinput[arg1] !== undefined) {
// Invoke function on existing tags input
var retVal = tagsinput[arg1](arg2);
if (retVal !== undefined)
results.push(retVal);
}
});
if ( typeof arg1 == 'string') {
// Return the results from the invoked function calls
return results.length > 1 ? results : results[0];
} else {
return results;
}
};
$.fn.tagsinput.Constructor = TagsInput;
/**
* Most options support both a string or number as well as a function as
* option value. This function makes sure that the option with the given
* key in the given options is wrapped in a function
*/
function makeOptionItemFunction(options, key) {
if (typeof options[key] !== 'function') {
var propertyName = options[key];
options[key] = function(item) { return item[propertyName]; };
}
}
function makeOptionFunction(options, key) {
if (typeof options[key] !== 'function') {
var value = options[key];
options[key] = function() { return value; };
}
}
/**
* HtmlEncodes the given value
*/
var htmlEncodeContainer = $('<div />');
function htmlEncode(value) {
if (value) {
return htmlEncodeContainer.text(value).html();
} else {
return '';
}
}
/**
* Returns the position of the caret in the given input field
* http://flightschool.acylt.com/devnotes/caret-position-woes/
*/
function doGetCaretPosition(oField) {
var iCaretPos = 0;
if (document.selection) {
oField.focus ();
var oSel = document.selection.createRange();
oSel.moveStart ('character', -oField.value.length);
iCaretPos = oSel.text.length;
} else if (oField.selectionStart || oField.selectionStart == '0') {
iCaretPos = oField.selectionStart;
}
return (iCaretPos);
}
/**
* Returns boolean indicates whether user has pressed an expected key combination.
* @param object keyPressEvent: JavaScript event object, refer
* http://www.w3.org/TR/2003/WD-DOM-Level-3-Events-20030331/ecma-script-binding.html
* @param object lookupList: expected key combinations, as in:
* [13, {which: 188, shiftKey: true}]
*/
function keyCombinationInList(keyPressEvent, lookupList) {
var found = false;
$.each(lookupList, function (index, keyCombination) {
if (typeof (keyCombination) === 'number' && keyPressEvent.which === keyCombination) {
found = true;
return false;
}
if (keyPressEvent.which === keyCombination.which) {
var alt = !keyCombination.hasOwnProperty('altKey') || keyPressEvent.altKey === keyCombination.altKey,
shift = !keyCombination.hasOwnProperty('shiftKey') || keyPressEvent.shiftKey === keyCombination.shiftKey,
ctrl = !keyCombination.hasOwnProperty('ctrlKey') || keyPressEvent.ctrlKey === keyCombination.ctrlKey;
if (alt && shift && ctrl) {
found = true;
return false;
}
}
});
return found;
}
/**
* Initialize tagsinput behaviour on inputs and selects which have
* data-role=tagsinput
*/
$(function() {
$("input[data-role=tagsinput], select[multiple][data-role=tagsinput]").tagsinput();
});
})(window.jQuery);
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