/
buildModuleUrl.js
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/
buildModuleUrl.js
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import defined from "./defined.js";
import DeveloperError from "./DeveloperError.js";
import getAbsoluteUri from "./getAbsoluteUri.js";
import Resource from "./Resource.js";
/*global CESIUM_BASE_URL*/
var cesiumScriptRegex = /((?:.*\/)|^)Cesium\.js(?:\?|\#|$)/;
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 a;
function tryMakeAbsolute(url) {
if (typeof document === "undefined") {
//Node.js and Web Workers. In both cases, the URL will already be absolute.
return url;
}
if (!defined(a)) {
a = document.createElement("a");
}
a.href = url;
// IE only absolutizes href on get, not set
// eslint-disable-next-line no-self-assign
a.href = a.href;
return a.href;
}
var baseResource;
function getCesiumBaseUrl() {
if (defined(baseResource)) {
return baseResource;
}
var baseUrlString;
if (typeof CESIUM_BASE_URL !== "undefined") {
baseUrlString = CESIUM_BASE_URL;
} else if (
typeof define === "object" &&
defined(define.amd) &&
!define.amd.toUrlUndefined &&
defined(require.toUrl)
) {
baseUrlString = getAbsoluteUri(
"..",
buildModuleUrl("Core/buildModuleUrl.js")
);
} 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');
baseResource = new Resource({
url: tryMakeAbsolute(baseUrlString),
});
baseResource.appendForwardSlash();
return baseResource;
}
function buildModuleUrlFromRequireToUrl(moduleID) {
//moduleID will be non-relative, so require it relative to this module, in Core.
return tryMakeAbsolute(require.toUrl("../" + moduleID));
}
function buildModuleUrlFromBaseUrl(moduleID) {
var resource = getCesiumBaseUrl().getDerivedResource({
url: moduleID,
});
return resource.url;
}
var implementation;
/**
* Given a relative URL under the Cesium base URL, returns an absolute URL.
* @function
*
* @param {String} relativeUrl The relative path.
*
* @example
* var viewer = new Cesium.Viewer("cesiumContainer", {
* imageryProvider: new Cesium.TileMapServiceImageryProvider({
* url: Cesium.buildModuleUrl("Assets/Textures/NaturalEarthII"),
* }),
* baseLayerPicker: false,
* });
*/
function buildModuleUrl(relativeUrl) {
if (!defined(implementation)) {
//select implementation
if (
typeof define === "object" &&
defined(define.amd) &&
!define.amd.toUrlUndefined &&
defined(require.toUrl)
) {
implementation = buildModuleUrlFromRequireToUrl;
} else {
implementation = buildModuleUrlFromBaseUrl;
}
}
var url = implementation(relativeUrl);
return url;
}
// exposed for testing
buildModuleUrl._cesiumScriptRegex = cesiumScriptRegex;
buildModuleUrl._buildModuleUrlFromBaseUrl = buildModuleUrlFromBaseUrl;
buildModuleUrl._clearBaseResource = function () {
baseResource = undefined;
};
/**
* Sets the base URL for resolving modules.
* @param {String} value The new base URL.
*/
buildModuleUrl.setBaseUrl = function (value) {
baseResource = Resource.DEFAULT.getDerivedResource({
url: value,
});
};
/**
* Gets the base URL for resolving modules.
*/
buildModuleUrl.getCesiumBaseUrl = getCesiumBaseUrl;
export default buildModuleUrl;