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/**
* @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
* Licensed under the terms of the MIT license. See LICENSE.md for more information.
*/
/* exported SF */
'use strict';
var SF = ( function() {
var SF = {};
SF.attachListener = function( elem, evtName, callback ) {
if ( elem.addEventListener ) {
elem.addEventListener( evtName, callback, false );
} else if ( elem.attachEvent ) {
elem.attachEvent( 'on' + evtName , function() {
callback.apply( elem, arguments );
} );
} else {
throw new Error( 'Could not attach event.' );
}
};
SF.indexOf = ( function() {
var indexOf = Array.prototype.indexOf;
if ( indexOf === 'function' ) {
return function( arr, elem ) {
return indexOf.call( arr, elem );
};
} else {
return function( arr, elem ) {
var max = arr.length;
for ( var i = 0; i < max; i++ ) {
if ( arr[ i ] === elem ) {
return i;
}
}
return -1;
};
}
}() );
SF.accept = function( node, visitor ) {
var children;
// Handling node as a node and array
if ( node.children ) {
children = node.children;
visitor( node );
} else if ( typeof node.length === 'number' ) {
children = node;
}
var i = children ? ( children.length || 0 ) : 0;
while ( i-- ) {
SF.accept( children[ i ], visitor );
}
};
SF.getByClass = ( function( ) {
var getByClass = document.getElementsByClassName;
if ( typeof getByClass === 'function' ) {
return function( root, className ) {
if ( typeof root === 'string' ) {
className = root;
root = document;
}
return getByClass.call( root, className );
};
}
return function( root, className ) {
if ( typeof root === 'string' ) {
className = root;
root = document.getElementsByTagName( 'html' )[ 0 ];
}
var results = [];
SF.accept( root, function( elem ) {
if ( SF.classList.contains( elem, className ) ) {
results.push( elem );
}
} );
return results;
};
}() );
SF.classList = {};
SF.classList.add = function( elem, className ) {
var classes = parseClasses( elem );
classes.push( className );
elem.attributes.setNamedItem( createClassAttr( classes ) );
};
SF.classList.remove = function( elem, className ) {
var classes = parseClasses( elem, className ),
foundAt = SF.indexOf( classes, className );
if ( foundAt === -1 ) {
return;
}
classes.splice( foundAt, 1 );
elem.attributes.setNamedItem( createClassAttr( classes ) );
};
SF.classList.contains = function( elem, className ) {
return findIndex( elem, className ) !== -1;
};
SF.classList.toggle = function( elem, className ) {
this.contains( elem, className ) ? this.remove( elem, className ) : this.add( elem, className );
};
function findIndex( elem, className ) {
return SF.indexOf( parseClasses( elem ), className );
}
function parseClasses( elem ) {
var classAttr = elem.attributes ? elem.attributes.getNamedItem( 'class' ) : null;
return classAttr ? classAttr.value.split( ' ' ) : [];
}
function createClassAttr( classesArray ) {
var attr = document.createAttribute( 'class' );
attr.value = classesArray.join( ' ' );
return attr;
}
return SF;
}() );