/*!
 * classie - class helper functions
 * from bonzo https://github.com/ded/bonzo
 * 
 * classie.has( elem, 'my-class' ) -> true/false
 * classie.add( elem, 'my-new-class' )
 * classie.remove( elem, 'my-unwanted-class' )
 * classie.toggle( elem, 'my-class' )
 */

/*jshint browser: true, strict: true, undef: true */

( function( window ) {

'use strict';

// class helper functions from bonzo https://github.com/ded/bonzo

function classreg( classname ) {
  return new regexp("(^|\\s+)" + classname + "(\\s+|$)");
}

// classlist support for class management
// altho to be fair, the api sucks because it won't accept multiple classes at once
var hasclass, addclass, removeclass;

if ( 'classlist' in document.documentelement ) {
  hasclass = function( elem, c ) {
    return elem.classlist.contains( c );
  };
  addclass = function( elem, c ) {
    elem.classlist.add( c );
  };
  removeclass = function( elem, c ) {
    elem.classlist.remove( c );
  };
}
else {
  hasclass = function( elem, c ) {
    return classreg( c ).test( elem.classname );
  };
  addclass = function( elem, c ) {
    if ( !hasclass( elem, c ) ) {
      elem.classname = elem.classname + ' ' + c;
    }
  };
  removeclass = function( elem, c ) {
    elem.classname = elem.classname.replace( classreg( c ), ' ' );
  };
}

function toggleclass( elem, c ) {
  var fn = hasclass( elem, c ) ? removeclass : addclass;
  fn( elem, c );
}

window.classie = {
  // full names
  hasclass: hasclass,
  addclass: addclass,
  removeclass: removeclass,
  toggleclass: toggleclass,
  // short names
  has: hasclass,
  add: addclass,
  remove: removeclass,
  toggle: toggleclass
};

})( window );