? element.href || !isNaN(tabIndex)
: !isNaN(tabIndex))
// the element and all of its ancestors must be visible
// the browser may report that the area is hidden
&& !$(element)[‘area’ == nodeName ? ‘parents’ : ‘closest’](‘:hidden’).length;
},
tabbable: function(element) {
var tabIndex = $.attr(element, ‘tabindex’);
return (isNaN(tabIndex) || tabIndex >= 0) && $(element).is(‘:focusable’);
}
});
// $.widget is a factory to create jQuery plugins
// taking some boilerplate code out of the plugin code
function getter(namespace, plugin, method, args) {
function getMethods(type) {
var methods = $[namespace][plugin][type] || [];
return (typeof methods == ‘string’ ? methods.split(/,?s+/) : methods);
}
var methods = getMethods(‘getter’);
if (args.length == 1 && typeof args[0] == ‘string’) {
methods = methods.concat(getMethods(‘getterSetter’));
}
return ($.inArray(method, methods) != -1);
}
$.widget = function(name, prototype) {
var namespace = name.split(“.”)[0];
name = name.split(“.”)[1];
// create plugin method
$.fn[name] = function(options) {
var isMethodCall = (typeof options == ‘string’),
args = Array.prototype.slice.call(arguments, 1);
// prevent calls to internal methods
if (isMethodCall && options.substring(0, 1) == ‘_’) {
return this;
}
// handle getter methods
if (isMethodCall && getter(namespace, name, options, args)) {
var instance = $.data(this[0], name);
return (instance ? instance[options].apply(instance, args)
: undefined);
}
// handle initialization and non-getter methods
return this.each(function() {
var instance = $.data(this, name);
// constructor
(!instance && !isMethodCall &&
$.data(this, name, new $[namespace][name](this, options))._init());
// method call
(instance && isMethodCall && $.isFunction(instance[options]) &&
instance[options].apply(instance, args));
});
};
// create widget constructor
$[namespace] = $[namespace] || {};
$[namespace][name] = function(element, options) {
var self = this;
this.namespace = namespace;
this.widgetName = name;
this.widgetEventPrefix = $[namespace][name].eventPrefix || name;
this.widgetBaseClass = namespace + ‘-‘ + name;
this.options = $.extend({},
$.widget.defaults,
$[namespace][name].defaults,
$.metadata && $.metadata.get(element)[name],
options);
this.element = $(element)
.bind(‘setData.’ + name, function(event, key, value) {
if (event.target == element) {
return self._setData(key, value);
}
})
.bind(‘getData.’ + name, function(event, key) {
if (event.target == element) {
