!function($) {
"use strict";// jshint ;_;
if (typeof ko !== 'undefined' && ko.bindingHandlers && !ko.bindingHandlers.multiselect) {
ko.bindingHandlers.multiselect = {
init: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {},
update: function(element, valueAccessor, allBindingsAccessor, viewModel, bindingContext) {
var config = ko.utils.unwrapObservable(valueAccessor());
var selectOptions = allBindingsAccessor().options;
var ms = $(element).data('multiselect');
if (!ms) {
$(element).multiselect(config);
}
else {
ms.updateOriginalOptions();
if (selectOptions && selectOptions().length !== ms.originalOptions.length) {
$(element).multiselect('rebuild');
}
}
}
};
}
function Multiselect(select, options) {
this.options = this.mergeOptions(options);
this.$select = $(select);
this.originalOptions = this.$select.clone()[0].options;
this.query = '';
this.searchTimeout = null;
this.options.multiple = this.$select.attr('multiple') === "multiple";
this.options.onChange = $.proxy(this.options.onChange, this);
this.options.onDropdownShow = $.proxy(this.options.onDropdownShow, this);
this.options.onDropdownHide = $.proxy(this.options.onDropdownHide, this);
// Build select all if enabled.
this.buildContainer();
this.buildButton();
this.buildSelectAll();
this.buildDropdown();
this.buildDropdownOptions();
this.buildFilter();
this.updateButtonText();
this.updateSelectAll();
this.$select.hide().after(this.$container);
};
Multiselect.prototype = {
defaults: {
buttonText: function(options, select) {
if (options.length === 0) {
return this.nonSelectedText + ' <b class="caret"></b>';
}
else {
if (options.length > this.numberDisplayed) {
return options.length + ' ' + this.nSelectedText + ' <b class="caret"></b>';
}
else {
var selected = '';
options.each(function() {
var label = ($(this).attr('label') !== undefined) ? $(this).attr('label') : $(this).html();
selected += label + ', ';
});
return selected.substr(0, selected.length - 2) + ' <b class="caret"></b>';
}
}
},
buttonTitle: function(options, select) {
if (options.length === 0) {
return this.nonSelectedText;
}
else {
var selected = '';
options.each(function () {
selected += $(this).text() + ', ';
});
return selected.substr(0, selected.length - 2);
}
},
label: function(element){
return $(element).attr('label') || $(element).html();
},
onChange : function(option, checked) {
},
onDropdownShow: function(event) {
},
onDropdownHide: function(event) {
},
buttonClass: 'btn btn-default',
dropRight: false,
selectedClass: 'active',
buttonWidth: 'auto',
buttonContainer: '<div class="btn-group" />',
maxHeight: false,
includeSelectAllOption: false,
selectAllText: ' Select all',
selectAllValue: 'multiselect-all',
enableFiltering: false,
enableCaseInsensitiveFiltering: false,
filterPlaceholder: 'Search',
filterBehavior: 'text',
preventInputChangeEvent: false,
nonSelectedText: 'None selected',
nSelectedText: 'selected',
numberDisplayed: 3
},
templates: {
button: '<button type="button" class="multiselect dropdown-toggle" data-toggle="dropdown"></button>',
ul: '<ul class="multiselect-container dropdown-menu"></ul>',
filter: '<div class="input-group"><span class="input-group-addon"><i class="glyphicon glyphicon-search"></i></span><input class="form-control multiselect-search" type="text"></div>',
li: '<li><a href="javascript:void(0);"><label></label></a></li>',
divider: '<li class="divider"></li>',
liGroup: '<li><label class="multiselect-group"></label></li>'
},
constructor: Multiselect,
buildContainer: function() {
this.$container = $(this.options.buttonContainer);
this.$container.on('show.bs.dropdown', this.options.onDropdownShow);
this.$container.on('hide.bs.dropdown', this.options.onDropdownHide);
},
buildButton: function() {
this.$button = $(this.templates.button).addClass(this.options.buttonClass);
// Adopt active state.
if (this.$select.prop('disabled')) {
this.disable();
}
else {
this.enable();
}
// Manually add button width if set.
if (this.options.buttonWidth && this.options.buttonWidth != 'auto') {
this.$button.css({
'width' : this.options.buttonWidth
});
}
// Keep the tab index from the select.
var tabindex = this.$select.attr('tabindex');
if (tabindex) {
this.$button.attr('tabindex', tabindex);
}
this.$container.prepend(this.$button);
},
buildDropdown: function() {
// Build ul.
this.$ul = $(this.templates.ul);
if (this.options.dropRight) {
this.$ul.addClass('dropdown-menu-right');
}
// Set max height of dropdown menu to activate auto scrollbar.
if (this.options.maxHeight) {
// TODO: Add a class for this option to move the css declarations.
this.$ul.css({
'max-height': this.options.maxHeight + 'px',
'overflow-y': 'auto',
'overflow-x': 'hidden'
});
}
this.$container.append(this.$ul);
},
buildDropdownOptions: function() {
this.$select.children().each($.proxy(function(index, element) {
// Support optgroups and options without a group simultaneously.
var tag = $(element).prop('tagName')
.toLowerCase();
if (tag === 'optgroup') {
this.createOptgroup(element);
}
else if (tag === 'option') {
if ($(element).data('role') === 'divider') {
this.createDivider();
}
else {
this.createOptionValue(element);
}
}
// Other illegal tags will be ignored.
}, this));
// Bind the change event on the dropdown elements.
$('li input', this.$ul).on('change', $.proxy(function(event) {
var checked = $(event.target).prop('checked') || false;
var isSelectAllOption = $(event.target).val() === this.options.selectAllValue;
// Apply or unapply the configured selected class.
if (this.options.selectedClass) {
if (checked) {
$(event.target).parents('li')
.addClass(this.options.selectedClass);
}
else {
$(event.target).parents('li')
.removeClass(this.options.selectedClass);
}
}
// Get the corresponding option.
var value = $(event.target).val();
var $option = this.getOptionByValue(value);
var $optionsNotThis = $('option', this.$select).not($option);
var $checkboxesNotThis = $('input', this.$container).not($(event.target));
if (isSelectAllOption) {
if (this.$select[0][0].value === this.options.selectAllValue) {
var values = [];
var options = $('option[value!="' + this.options.selectAllValue + '"]', this.$select);
for (var i = 0; i < options.length; i++) {
// Additionally check whether the option is visible within the dropcown.
if (options[i].value !== this.options.selectAllValue && this.getInputByValue(options[i].value).is(':visible')) {
values.push(options[i].value);
}
}
if (checked) {
this.select(values);
}
else {
this.deselect(values);
}
}
}
if (checked) {
$option.prop('selected', true);
if (this.options.multiple) {
// Simply select additional option.
$option.prop('selected', true);
}
else {
// Unselect all other options and corresponding checkboxes.
if (this.options.selectedClass) {
$($checkboxesNotThis).parents('li').removeClass(this.options.selectedClass);
}
$($checkboxesNotThis).prop('checked', false);
$optionsNotThis.prop('selected', false);
// It's a single selection, so close.
this.$button.click();
}
if (this.options.selectedClass === "active") {
$optionsNotThis.parents("a").css("outline", "");
}
}
else {
// Unselect option.
$option.prop('selected', false);
}
this.$select.change();
this.options.onChange($option, checked);
this.updateButtonText();
this.updateSelectAll();
if(this.options.preventInputChangeEvent) {
return false;
}
}, this));
$('li a', this.$ul).on('touchstart click', function(event) {
event.stopPropagation();
if (event.shiftKey) {
var checked = $(event.target).prop('checked') || false;
if (checked) {
var prev = $(event.target).parents('li:last')
.siblings('li[class="active"]:first');
var currentIdx = $(event.target).parents('li')
.index();
var prevIdx = prev.index();
if (currentIdx > prevIdx) {
$(event.target).parents("li:last").prevUntil(prev).each(
function() {
$(this).find("input:first").prop("checked", true)
.trigger("change");
}
);
}
else {
$(event.target).parents("li:last").nextUntil(prev).each(
function() {
$(this).find("input:first").prop("checked", true)
.trigger("change");
}
);
}
}
}
$(event.target).blur();
});
// Keyboard support.
this.$container.on('keydown', $.proxy(function(event) {
if ($('input[type="text"]', this.$container).is(':focus')) {
return;
}
if ((event.keyCode === 9 || event.keyCode === 27)
&& this.$container.hasClass('open')) {
// Close on tab or escape.
this.$button.click();
}
else {
var $items = $(this.$container).find("li:not(.divider):visible a");
if (!$items.length) {
return;
}
var index = $items.index($items.filter(':focus'));
// Navigation up.
if (event.keyCode === 38 && index > 0) {
index--;
}
// Navigate down.
else if (event.keyCode === 40 && index < $items.length - 1) {
index++;
}
else if (!~index) {
index = 0;
}
var $current = $items.eq(index);
$current.focus();
if (event.keyCode === 32 || event.keyCode === 13) {
var $checkbox = $current.find('input');
$checkbox.prop("checked", !$checkbox.prop("checked"));
$checkbox.change();
}
event.stopPropagation();
event.preventDefault();
}
}, this));
},
createOptionValue: function(element) {
if ($(element).is(':selected')) {
$(element).prop('selected', true);
}
// Support the label attribute on options.
var label = this.options.label(element);
var value = $(element).val();
var inputType = this.options.multiple ? "checkbox" : "radio";
var $li = $(this.templates.li);
$('label', $li).addClass(inputType);
$('label', $li).append('<input type="' + inputType + '" />');
var selected = $(element).prop('selected') || false;
var $checkbox = $('input', $li);
$checkbox.val(value);
if (value === this.options.selectAllValue) {
$checkbox.parent().parent()
.addClass('multiselect-all');
}
$('label', $li).append(" " + label);
this.$ul.append($li);
if ($(element).is(':disabled')) {
$checkbox.attr('disabled', 'disabled')
.prop('disabled', true)
.parents('li')
.addClass('disabled');
}
$checkbox.prop('checked', selected);
if (selected && this.options.selectedClass) {
$checkbox.parents('li')
.addClass(this.options.selectedClass);
}
},
createDivider: function(element) {
var $divider = $(this.templates.divider);
this.$ul.append($divider);
},
createOptgroup: function(group) {
var groupName = $(group).prop('label');
// Add a header for the group.
var $li = $(this.templates.liGroup);
$('label', $li).text(groupName);
this.$ul.append($li);
// Add the options of the group.
$('option', group).each($.proxy(function(index, element) {
this.createOptionValue(element);
}, this));
},
buildSelectAll: function() {
var alreadyHasSelectAll = this.hasSelectAll();
// If options.includeSelectAllOption === true, add the include all checkbox.
if (this.options.includeSelectAllOption && this.options.multiple && !alreadyHasSelectAll) {
this.$select.prepend('<option value="' + this.options.selectAllValue + '">' + this.options.selectAllText + '</option>');
}
},
buildFilter: function() {
// Build filter if filtering OR case insensitive filtering is enabled and the number of options exceeds (or equals) enableFilterLength.
if (this.options.enableFiltering || this.options.enableCaseInsensitiveFiltering) {
var enableFilterLength = Math.max(this.options.enableFiltering, this.options.enableCaseInsensitiveFiltering);
if (this.$select.find('option').length >= enableFilterLength) {
this.$filter = $(this.templates.filter);
$('input', this.$filter).attr('placeholder', this.options.filterPlaceholder);
this.$ul.prepend(this.$filter);
this.$filter.val(this.query).on('click', function(event) {
event.stopPropagation();
}).on('input keydown', $.proxy(function(event) {
// This is useful to catch "keydown" events after the browser has updated the control.
clearTimeout(this.searchTimeout);
this.searchTimeout = this.asyncFunction($.proxy(function() {
if (this.query !== event.target.value) {
this.query = event.target.value;
$.each($('li', this.$ul), $.proxy(function(index, element) {
var value = $('input', element).val();
var text = $('label', element).text();
if (value !== this.options.selectAllValue && text) {
// by default lets assume that element is not
// interesting for this search
var showElement = false;
var filterCandidate = '';
if ((this.options.filterBehavior === 'text' || this.options.filterBehavior === 'both')) {
filterCandidate = text;
}
if ((this.options.filterBehavior === 'value' || this.options.filterBehavior === 'both')) {
filterCandidate = value;
}
if (this.options.enableCaseInsensitiveFiltering && filterCandidate.toLowerCase().indexOf(this.query.toLowerCase()) > -1) {
showElement = true;
}
else if (filterCandidate.indexOf(this.query) > -1) {
showElement = true;
}
if (showElement) {
$(element).show();
}
else {
$(element).hide();
}
}
}, this));
}
// TODO: check whether select all option needs to be updated.
}, this), 300, this);
}, this));
}
}
},
destroy: function() {
this.$container.remove();
this.$select.show();
},
refresh: function() {
$('option', this.$select).each($.proxy(function(index, element) {
var $input = $('li input', this.$ul).filter(function() {
return $(this).val() === $(element).val();
});
if ($(element).is(':selected')) {
$input.prop('checked', true);
if (this.options.selectedClass) {
$input.parents('li')
.addClass(this.options.selectedClass);
}
}
else {
$input.prop('checked', false);
if (this.options.selectedClass) {
$input.parents('li')
.removeClass(this.options.selectedClass);
}
}
if ($(element).is(":disabled")) {
$input.attr('disabled', 'disabled')
.prop('disabled', true)
.parents('li')
.addClass('disabled');
}
else {
$input.prop('disabled', false)
.parents('li')
.removeClass('disabled');
}
}, this));
this.updateButtonText();
this.updateSelectAll();
},
select: function(selectValues) {
if(selectValues && !$.isArray(selectValues)) {
selectValues = [selectValues];
}
for (var i = 0; i < selectValues.length; i++) {
var value = selectValues[i];
var $option = this.getOptionByValue(value);
var $checkbox = this.getInputByValue(value);
if (this.options.selectedClass) {
$checkbox.parents('li')
.addClass(this.options.selectedClass);
}
$checkbox.prop('checked', true);
$option.prop('selected', true);
}
this.updateButtonText();
},
deselect: function(deselectValues) {
if(deselectValues && !$.isArray(deselectValues)) {
deselectValues = [deselectValues];
}
for (var i = 0; i < deselectValues.length; i++) {
var value = deselectValues[i];
var $option = this.getOptionByValue(value);
var $checkbox = this.getInputByValue(value);
if (this.options.selectedClass) {
$checkbox.parents('li')
.removeClass(this.options.selectedClass);
}
$checkbox.prop('checked', false);
$option.prop('selected', false);
}
this.updateButtonText();
},
rebuild: function() {
this.$ul.html('');
$('option[value="' + this.options.selectAllValue + '"]', this.$select).remove();
this.options.multiple = this.$select.attr('multiple') === "multiple";
this.buildSelectAll();
this.buildDropdownOptions();
this.buildFilter();
this.updateButtonText();
this.updateSelectAll();
},
dataprovider: function(dataprovider) {
var optionDOM = "";
dataprovider.forEach(function (option) {
optionDOM += '<option value="' + option.value + '">' + option.label + '</option>';
});
this.$select.html(optionDOM);
this.rebuild();
},
enable: function() {
this.$select.prop('disabled', false);
this.$button.prop('disabled', false)
.removeClass('disabled');
},
disable: function() {
this.$select.prop('disabled', true);
this.$button.prop('disabled', true)
.addClass('disabled');
},
setOptions: function(options) {
this.options = this.mergeOptions(options);
},
mergeOptions: function(options) {
return $.extend({}, this.defaults, options);
},
hasSelectAll: function() {
return this.$select[0][0] ? this.$select[0][0].value === this.options.selectAllValue : false;
},
updateSelectAll: function() {
if (this.hasSelectAll()) {
var selected = this.getSelected();
if (selected.length === $('option', this.$select).length - 1) {
this.select(this.options.selectAllValue);
}
else {
this.deselect(this.options.selectAllValue);
}
}
},
updateButtonText: function() {
var options = this.getSelected();
// First update the displayed button text.
$('button', this.$container).html(this.options.buttonText(options, this.$select));
// Now update the title attribute of the button.
$('button', this.$container).attr('title', this.options.buttonTitle(options, this.$select));
},
getSelected: function() {
return $('option[value!="' + this.options.selectAllValue + '"]:selected', this.$select).filter(function() {
return $(this).prop('selected');
});
},
getOptionByValue: function(value) {
return $('option', this.$select).filter(function() {
return $(this).val() === value;
});
},
getInputByValue: function(value) {
return $('li input', this.$ul).filter(function() {
return $(this).val() === value;
});
},
updateOriginalOptions: function() {
this.originalOptions = this.$select.clone()[0].options;
},
asyncFunction: function(callback, timeout, self) {
var args = Array.prototype.slice.call(arguments, 3);
return setTimeout(function() {
callback.apply(self || window, args);
}, timeout);
}
};
$.fn.multiselect = function(option, parameter) {
return this.each(function() {
var data = $(this).data('multiselect');
var options = typeof option === 'object' && option;
// Initialize the multiselect.
if (!data) {
$(this).data('multiselect', ( data = new Multiselect(this, options)));
}
// Call multiselect method.
if (typeof option === 'string') {
data[option](parameter);
}
});
};
$.fn.multiselect.Constructor = Multiselect;
$(function() {
$("select[data-role=multiselect]").multiselect();
});
}(window.jQuery);