fuelux/js/checkbox.js

/* global jQuery:true */

/*
 * Fuel UX Checkbox
 * https://github.com/ExactTarget/fuelux
 *
 * Copyright (c) 2014 ExactTarget
 * Licensed under the BSD New license.
 */

// -- BEGIN UMD WRAPPER PREFACE --

// For more information on UMD visit:
// https://github.com/umdjs/umd/blob/master/jqueryPlugin.js

(function umdFactory (factory) {
	if (typeof define === 'function' && define.amd) {
		// if AMD loader is available, register as an anonymous module.
		define(['jquery'], factory);
	} else if (typeof exports === 'object') {
		// Node/CommonJS
		module.exports = factory(require('jquery'));
	} else {
		// OR use browser globals if AMD is not present
		factory(jQuery);
	}
}(function CheckboxWrapper ($) {
	// -- END UMD WRAPPER PREFACE --

	// -- BEGIN MODULE CODE HERE --

	var old = $.fn.checkbox;

	// CHECKBOX CONSTRUCTOR AND PROTOTYPE

	var logError = function logError (error) {
		if (window && window.console && window.console.error) {
			window.console.error(error);
		}
	};

	var Checkbox = function Checkbox (element, options) {
		this.options = $.extend({}, $.fn.checkbox.defaults, options);
		var $element = $(element);

		if (element.tagName.toLowerCase() !== 'label') {
			logError('Checkbox must be initialized on the `label` that wraps the `input` element. See https://github.com/ExactTarget/fuelux/blob/master/reference/markup/checkbox.html for example of proper markup. Call `.checkbox()` on the `<label>` not the `<input>`');
			return;
		}

		// cache elements
		this.$label = $element;
		this.$chk = this.$label.find('input[type="checkbox"]');
		this.$container = $element.parent('.checkbox'); // the container div

		if (!this.options.ignoreVisibilityCheck && this.$chk.css('visibility').match(/hidden|collapse/)) {
			logError('For accessibility reasons, in order for tab and space to function on checkbox, checkbox `<input />`\'s `visibility` must not be set to `hidden` or `collapse`. See https://github.com/ExactTarget/fuelux/pull/1996 for more details.');
		}

		// determine if a toggle container is specified
		var containerSelector = this.$chk.attr('data-toggle');
		this.$toggleContainer = $(containerSelector);

		// handle internal events
		this.$chk.on('change', $.proxy(this.itemchecked, this));

		// set default state
		this.setInitialState();
	};

	Checkbox.prototype = {

		constructor: Checkbox,

		setInitialState: function setInitialState () {
			var $chk = this.$chk;

			// get current state of input
			var checked = $chk.prop('checked');
			var disabled = $chk.prop('disabled');

			// sync label class with input state
			this.setCheckedState($chk, checked);
			this.setDisabledState($chk, disabled);
		},

		setCheckedState: function setCheckedState (element, checked) {
			var $chk = element;
			var $lbl = this.$label;
			var $containerToggle = this.$toggleContainer;

			if (checked) {
				$chk.prop('checked', true);
				$lbl.addClass('checked');
				$containerToggle.removeClass('hide hidden');
				$lbl.trigger('checked.fu.checkbox');
			} else {
				$chk.prop('checked', false);
				$lbl.removeClass('checked');
				$containerToggle.addClass('hidden');
				$lbl.trigger('unchecked.fu.checkbox');
			}

			$lbl.trigger('changed.fu.checkbox', checked);
		},

		setDisabledState: function setDisabledState (element, disabled) {
			var $chk = $(element);
			var $lbl = this.$label;

			if (disabled) {
				$chk.prop('disabled', true);
				$lbl.addClass('disabled');
				$lbl.trigger('disabled.fu.checkbox');
			} else {
				$chk.prop('disabled', false);
				$lbl.removeClass('disabled');
				$lbl.trigger('enabled.fu.checkbox');
			}

			return $chk;
		},

		itemchecked: function itemchecked (evt) {
			var $chk = $(evt.target);
			var checked = $chk.prop('checked');

			this.setCheckedState($chk, checked);
		},

		toggle: function toggle () {
			var checked = this.isChecked();

			if (checked) {
				this.uncheck();
			} else {
				this.check();
			}
		},

		check: function check () {
			this.setCheckedState(this.$chk, true);
		},

		uncheck: function uncheck () {
			this.setCheckedState(this.$chk, false);
		},

		isChecked: function isChecked () {
			var checked = this.$chk.prop('checked');
			return checked;
		},

		enable: function enable () {
			this.setDisabledState(this.$chk, false);
		},

		disable: function disable () {
			this.setDisabledState(this.$chk, true);
		},

		destroy: function destroy () {
			this.$label.remove();
			return this.$label[0].outerHTML;
		}
	};

	Checkbox.prototype.getValue = Checkbox.prototype.isChecked;

	// CHECKBOX PLUGIN DEFINITION

	$.fn.checkbox = function checkbox (option) {
		var args = Array.prototype.slice.call(arguments, 1);
		var methodReturn;

		var $set = this.each(function applyData () {
			var $this = $(this);
			var data = $this.data('fu.checkbox');
			var options = typeof option === 'object' && option;

			if (!data) {
				$this.data('fu.checkbox', (data = new Checkbox(this, options)));
			}

			if (typeof option === 'string') {
				methodReturn = data[option].apply(data, args);
			}
		});

		return (methodReturn === undefined) ? $set : methodReturn;
	};

	$.fn.checkbox.defaults = {
		ignoreVisibilityCheck: false
	};

	$.fn.checkbox.Constructor = Checkbox;

	$.fn.checkbox.noConflict = function noConflict () {
		$.fn.checkbox = old;
		return this;
	};

	// DATA-API

	$(document).on('mouseover.fu.checkbox.data-api', '[data-initialize=checkbox]', function initializeCheckboxes (e) {
		var $control = $(e.target);
		if (!$control.data('fu.checkbox')) {
			$control.checkbox($control.data());
		}
	});

	// Must be domReady for AMD compatibility
	$(function onReadyInitializeCheckboxes () {
		$('[data-initialize=checkbox]').each(function initializeCheckbox () {
			var $this = $(this);
			if (!$this.data('fu.checkbox')) {
				$this.checkbox($this.data());
			}
		});
	});

	// -- BEGIN UMD WRAPPER AFTERWORD --
}));
// -- END UMD WRAPPER AFTERWORD --