344 lines
11 KiB
JavaScript
344 lines
11 KiB
JavaScript
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/* Simple JavaScript Inheritance
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* By John Resig http://ejohn.org/
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* MIT Licensed.
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*/
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// Inspired by base2 and Prototype
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(function(){
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var initializing = false;
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// The base JQClass implementation (does nothing)
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window.JQClass = function(){};
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// Collection of derived classes
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JQClass.classes = {};
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// Create a new JQClass that inherits from this class
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JQClass.extend = function extender(prop) {
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var base = this.prototype;
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// Instantiate a base class (but only create the instance,
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// don't run the init constructor)
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initializing = true;
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var prototype = new this();
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initializing = false;
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// Copy the properties over onto the new prototype
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for (var name in prop) {
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// Check if we're overwriting an existing function
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prototype[name] = typeof prop[name] == 'function' &&
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typeof base[name] == 'function' ?
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(function(name, fn){
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return function() {
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var __super = this._super;
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// Add a new ._super() method that is the same method
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// but on the super-class
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this._super = function(args) {
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return base[name].apply(this, args || []);
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};
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var ret = fn.apply(this, arguments);
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// The method only need to be bound temporarily, so we
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// remove it when we're done executing
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this._super = __super;
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return ret;
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};
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})(name, prop[name]) :
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prop[name];
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}
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// The dummy class constructor
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function JQClass() {
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// All construction is actually done in the init method
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if (!initializing && this._init) {
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this._init.apply(this, arguments);
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}
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}
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// Populate our constructed prototype object
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JQClass.prototype = prototype;
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// Enforce the constructor to be what we expect
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JQClass.prototype.constructor = JQClass;
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// And make this class extendable
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JQClass.extend = extender;
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return JQClass;
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};
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})();
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(function($) { // Ensure $, encapsulate
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/** Abstract base class for collection plugins v1.0.1.
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Written by Keith Wood (kbwood{at}iinet.com.au) December 2013.
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Licensed under the MIT (http://keith-wood.name/licence.html) license.
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@module $.JQPlugin
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@abstract */
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JQClass.classes.JQPlugin = JQClass.extend({
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/** Name to identify this plugin.
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@example name: 'tabs' */
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name: 'plugin',
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/** Default options for instances of this plugin (default: {}).
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@example defaultOptions: {
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selectedClass: 'selected',
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triggers: 'click'
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} */
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defaultOptions: {},
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/** Options dependent on the locale.
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Indexed by language and (optional) country code, with '' denoting the default language (English/US).
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@example regionalOptions: {
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'': {
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greeting: 'Hi'
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}
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} */
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regionalOptions: {},
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/** Names of getter methods - those that can't be chained (default: []).
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@example _getters: ['activeTab'] */
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_getters: [],
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/** Retrieve a marker class for affected elements.
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@private
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@return {string} The marker class. */
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_getMarker: function() {
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return 'is-' + this.name;
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},
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/** Initialise the plugin.
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Create the jQuery bridge - plugin name <code>xyz</code>
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produces <code>$.xyz</code> and <code>$.fn.xyz</code>. */
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_init: function() {
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// Apply default localisations
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$.extend(this.defaultOptions, (this.regionalOptions && this.regionalOptions['']) || {});
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// Camel-case the name
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var jqName = camelCase(this.name);
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// Expose jQuery singleton manager
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$[jqName] = this;
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// Expose jQuery collection plugin
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$.fn[jqName] = function(options) {
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var otherArgs = Array.prototype.slice.call(arguments, 1);
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if ($[jqName]._isNotChained(options, otherArgs)) {
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return $[jqName][options].apply($[jqName], [this[0]].concat(otherArgs));
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}
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return this.each(function() {
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if (typeof options === 'string') {
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if (options[0] === '_' || !$[jqName][options]) {
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throw 'Unknown method: ' + options;
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}
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$[jqName][options].apply($[jqName], [this].concat(otherArgs));
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}
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else {
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$[jqName]._attach(this, options);
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}
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});
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};
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},
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/** Set default values for all subsequent instances.
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@param options {object} The new default options.
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@example $.plugin.setDefauls({name: value}) */
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setDefaults: function(options) {
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$.extend(this.defaultOptions, options || {});
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},
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/** Determine whether a method is a getter and doesn't permit chaining.
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@private
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@param name {string} The method name.
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@param otherArgs {any[]} Any other arguments for the method.
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@return {boolean} True if this method is a getter, false otherwise. */
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_isNotChained: function(name, otherArgs) {
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if (name === 'option' && (otherArgs.length === 0 ||
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(otherArgs.length === 1 && typeof otherArgs[0] === 'string'))) {
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return true;
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}
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return $.inArray(name, this._getters) > -1;
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},
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/** Initialise an element. Called internally only.
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Adds an instance object as data named for the plugin.
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@param elem {Element} The element to enhance.
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@param options {object} Overriding settings. */
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_attach: function(elem, options) {
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elem = $(elem);
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if (elem.hasClass(this._getMarker())) {
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return;
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}
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elem.addClass(this._getMarker());
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options = $.extend({}, this.defaultOptions, this._getMetadata(elem), options || {});
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var inst = $.extend({name: this.name, elem: elem, options: options},
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this._instSettings(elem, options));
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elem.data(this.name, inst); // Save instance against element
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this._postAttach(elem, inst);
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this.option(elem, options);
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},
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/** Retrieve additional instance settings.
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Override this in a sub-class to provide extra settings.
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@param elem {jQuery} The current jQuery element.
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@param options {object} The instance options.
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@return {object} Any extra instance values.
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@example _instSettings: function(elem, options) {
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return {nav: elem.find(options.navSelector)};
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} */
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_instSettings: function(elem, options) {
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return {};
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},
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/** Plugin specific post initialisation.
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Override this in a sub-class to perform extra activities.
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@param elem {jQuery} The current jQuery element.
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@param inst {object} The instance settings.
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@example _postAttach: function(elem, inst) {
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elem.on('click.' + this.name, function() {
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...
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});
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} */
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_postAttach: function(elem, inst) {
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},
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/** Retrieve metadata configuration from the element.
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Metadata is specified as an attribute:
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<code>data-<plugin name>="<setting name>: '<value>', ..."</code>.
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Dates should be specified as strings in this format: 'new Date(y, m-1, d)'.
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@private
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@param elem {jQuery} The source element.
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@return {object} The inline configuration or {}. */
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_getMetadata: function(elem) {
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try {
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var data = elem.data(this.name.toLowerCase()) || '';
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data = data.replace(/'/g, '"');
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data = data.replace(/([a-zA-Z0-9]+):/g, function(match, group, i) {
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var count = data.substring(0, i).match(/"/g); // Handle embedded ':'
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return (!count || count.length % 2 === 0 ? '"' + group + '":' : group + ':');
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});
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data = $.parseJSON('{' + data + '}');
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for (var name in data) { // Convert dates
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var value = data[name];
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if (typeof value === 'string' && value.match(/^new Date\((.*)\)$/)) {
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data[name] = eval(value);
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}
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}
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return data;
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}
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catch (e) {
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return {};
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}
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},
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/** Retrieve the instance data for element.
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@param elem {Element} The source element.
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@return {object} The instance data or {}. */
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_getInst: function(elem) {
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return $(elem).data(this.name) || {};
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},
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/** Retrieve or reconfigure the settings for a plugin.
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@param elem {Element} The source element.
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@param name {object|string} The collection of new option values or the name of a single option.
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@param [value] {any} The value for a single named option.
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@return {any|object} If retrieving a single value or all options.
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@example $(selector).plugin('option', 'name', value)
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$(selector).plugin('option', {name: value, ...})
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var value = $(selector).plugin('option', 'name')
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var options = $(selector).plugin('option') */
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option: function(elem, name, value) {
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elem = $(elem);
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var inst = elem.data(this.name);
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if (!name || (typeof name === 'string' && value == null)) {
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var options = (inst || {}).options;
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return (options && name ? options[name] : options);
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}
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if (!elem.hasClass(this._getMarker())) {
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return;
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}
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var options = name || {};
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if (typeof name === 'string') {
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options = {};
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options[name] = value;
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}
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this._optionsChanged(elem, inst, options);
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$.extend(inst.options, options);
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},
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/** Plugin specific options processing.
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Old value available in <code>inst.options[name]</code>, new value in <code>options[name]</code>.
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Override this in a sub-class to perform extra activities.
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@param elem {jQuery} The current jQuery element.
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@param inst {object} The instance settings.
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@param options {object} The new options.
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@example _optionsChanged: function(elem, inst, options) {
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if (options.name != inst.options.name) {
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elem.removeClass(inst.options.name).addClass(options.name);
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}
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} */
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_optionsChanged: function(elem, inst, options) {
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},
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/** Remove all trace of the plugin.
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Override <code>_preDestroy</code> for plugin-specific processing.
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@param elem {Element} The source element.
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@example $(selector).plugin('destroy') */
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destroy: function(elem) {
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elem = $(elem);
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if (!elem.hasClass(this._getMarker())) {
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return;
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}
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this._preDestroy(elem, this._getInst(elem));
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elem.removeData(this.name).removeClass(this._getMarker());
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},
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/** Plugin specific pre destruction.
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Override this in a sub-class to perform extra activities and undo everything that was
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done in the <code>_postAttach</code> or <code>_optionsChanged</code> functions.
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@param elem {jQuery} The current jQuery element.
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@param inst {object} The instance settings.
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@example _preDestroy: function(elem, inst) {
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elem.off('.' + this.name);
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} */
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_preDestroy: function(elem, inst) {
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}
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});
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/** Convert names from hyphenated to camel-case.
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@private
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@param value {string} The original hyphenated name.
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@return {string} The camel-case version. */
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function camelCase(name) {
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return name.replace(/-([a-z])/g, function(match, group) {
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return group.toUpperCase();
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});
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}
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/** Expose the plugin base.
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@namespace "$.JQPlugin" */
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$.JQPlugin = {
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/** Create a new collection plugin.
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@memberof "$.JQPlugin"
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@param [superClass='JQPlugin'] {string} The name of the parent class to inherit from.
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@param overrides {object} The property/function overrides for the new class.
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@example $.JQPlugin.createPlugin({
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name: 'tabs',
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defaultOptions: {selectedClass: 'selected'},
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_initSettings: function(elem, options) { return {...}; },
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_postAttach: function(elem, inst) { ... }
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}); */
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createPlugin: function(superClass, overrides) {
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if (typeof superClass === 'object') {
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overrides = superClass;
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superClass = 'JQPlugin';
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}
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superClass = camelCase(superClass);
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var className = camelCase(overrides.name);
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JQClass.classes[className] = JQClass.classes[superClass].extend(overrides);
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new JQClass.classes[className]();
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}
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};
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})(jQuery);
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