/*global define*/
define([
'../ThirdParty/Uri',
'./defined',
'./DeveloperError',
'./getAbsoluteUri',
'./joinUrls',
'require'
], function(
Uri,
defined,
DeveloperError,
getAbsoluteUri,
joinUrls,
require) {
'use strict';
/*global CESIUM_BASE_URL*/
var cesiumScriptRegex = /((?:.*\/)|^)cesium[\w-]*\.js(?:\W|$)/i;
function getBaseUrlFromCesiumScript() {
var scripts = document.getElementsByTagName('script');
for ( var i = 0, len = scripts.length; i < len; ++i) {
var src = scripts[i].getAttribute('src');
var result = cesiumScriptRegex.exec(src);
if (result !== null) {
return result[1];
}
}
return undefined;
}
var baseUrl;
function getCesiumBaseUrl() {
if (defined(baseUrl)) {
return baseUrl;
}
var baseUrlString;
if (typeof CESIUM_BASE_URL !== 'undefined') {
baseUrlString = CESIUM_BASE_URL;
} else {
baseUrlString = getBaseUrlFromCesiumScript();
}
//>>includeStart('debug', pragmas.debug);
if (!defined(baseUrlString)) {
throw new DeveloperError('Unable to determine Cesium base URL automatically, try defining a global variable called CESIUM_BASE_URL.');
}
//>>includeEnd('debug');
baseUrl = new Uri(getAbsoluteUri(baseUrlString));
return baseUrl;
}
function buildModuleUrlFromRequireToUrl(moduleID) {
//moduleID will be non-relative, so require it relative to this module, in Core.
return require.toUrl('../' + moduleID);
}
function buildModuleUrlFromBaseUrl(moduleID) {
return joinUrls(getCesiumBaseUrl(), moduleID);
}
var implementation;
var a;
/**
* Given a non-relative moduleID, returns an absolute URL to the file represented by that module ID,
* using, in order of preference, require.toUrl, the value of a global CESIUM_BASE_URL, or
* the base URL of the Cesium.js script.
*
* @private
*/
function buildModuleUrl(moduleID) {
if (!defined(implementation)) {
//select implementation
if (defined(require.toUrl)) {
implementation = buildModuleUrlFromRequireToUrl;
} else {
implementation = buildModuleUrlFromBaseUrl;
}
}
if (!defined(a)) {
a = document.createElement('a');
}
var url = implementation(moduleID);
a.href = url;
a.href = a.href; // IE only absolutizes href on get, not set
return a.href;
}
// exposed for testing
buildModuleUrl._cesiumScriptRegex = cesiumScriptRegex;
/**
* Sets the base URL for resolving modules.
* @param {String} value The new base URL.
*/
buildModuleUrl.setBaseUrl = function(value) {
baseUrl = new Uri(value).resolve(new Uri(document.location.href));
};
return buildModuleUrl;
});