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/*
url
Where possible use the modern window.URL API if its not available use the DOMParser method.
Copyright (C) 2010 - 2015 Glenn Jones. All Rights Reserved.
MIT License: https://raw.github.com/glennjones/microformat-shiv/master/license.txt
*/
var Modules = (function (modules) {
modules.url = {
/**
* creates DOM objects needed to resolve URLs
*/
init: function(){
//this._domParser = new DOMParser();
this._domParser = modules.domUtils.getDOMParser();
// do not use a head tag it does not work with IE9
this._html = '<base id="base" href=""></base><a id="link" href=""></a>';
this._nodes = this._domParser.parseFromString( this._html, 'text/html' );
this._baseNode = modules.domUtils.getElementById(this._nodes,'base');
this._linkNode = modules.domUtils.getElementById(this._nodes,'link');
},
/**
* resolves url to absolute version using baseUrl
*
* @param {String} url
* @param {String} baseUrl
* @return {String}
*/
resolve: function(url, baseUrl) {
// use modern URL web API where we can
if(modules.utils.isString(url) && modules.utils.isString(baseUrl) && url.indexOf('://') === -1){
// this try catch is required as IE has an URL object but no constuctor support
// http://glennjones.net/articles/the-problem-with-window-url
try {
var resolved = new URL(url, baseUrl).toString();
// deal with early Webkit not throwing an error - for Safari
if(resolved === '[object URL]'){
resolved = URI.resolve(baseUrl, url);
}
return resolved;
}catch(e){
// otherwise fallback to DOM
if(this._domParser === undefined){
this.init();
}
// do not use setAttribute it does not work with IE9
this._baseNode.href = baseUrl;
this._linkNode.href = url;
// dont use getAttribute as it returns orginal value not resolved
return this._linkNode.href;
}
}else{
if(modules.utils.isString(url)){
return url;
}
return '';
}
},
};
return modules;
} (Modules || {}));
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