/**
* The DOM utility provides a cross-browser abtraction layer
* normalizing DOM tasks, and adds extra helper functionality
* for other common tasks.
* @module dom
* @submodule dom-base
* @for DOM
*/
var CLASS_NAME = 'className';
Y.mix(Y.DOM, {
/**
* Determines whether a DOM element has the given className.
* @method hasClass
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to search for
* @return {Boolean} Whether or not the element has the given class.
*/
hasClass: function(node, className) {
var re = Y.DOM._getRegExp('(?:^|\\s+)' + className + '(?:\\s+|$)');
return re.test(node[CLASS_NAME]);
},
/**
* Adds a class name to a given DOM element.
* @method addClass
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to add to the class attribute
*/
addClass: function(node, className) {
if (!Y.DOM.hasClass(node, className)) { // skip if already present
node[CLASS_NAME] = Y.Lang.trim([node[CLASS_NAME], className].join(' '));
}
},
/**
* Removes a class name from a given element.
* @method removeClass
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to remove from the class attribute
*/
removeClass: function(node, className) {
if (className && Y.DOM.hasClass(node, className)) {
node[CLASS_NAME] = Y.Lang.trim(node[CLASS_NAME].replace(Y.DOM._getRegExp('(?:^|\\s+)' +
className + '(?:\\s+|$)'), ' '));
if ( Y.DOM.hasClass(node, className) ) { // in case of multiple adjacent
Y.DOM.removeClass(node, className);
}
}
},
/**
* Replace a class with another class for a given element.
* If no oldClassName is present, the newClassName is simply added.
* @method replaceClass
* @param {HTMLElement} element The DOM element.
* @param {String} oldClassName the class name to be replaced
* @param {String} newClassName the class name that will be replacing the old class name
*/
replaceClass: function(node, oldC, newC) {
//Y.log('replaceClass replacing ' + oldC + ' with ' + newC, 'info', 'Node');
Y.DOM.addClass(node, newC);
Y.DOM.removeClass(node, oldC);
},
/**
* If the className exists on the node it is removed, if it doesn't exist it is added.
* @method toggleClass
* @param {HTMLElement} element The DOM element.
* @param {String} className the class name to be toggled
*/
toggleClass: function(node, className) {
if (Y.DOM.hasClass(node, className)) {
Y.DOM.removeClass(node, className);
} else {
Y.DOM.addClass(node, className);
}
}
});