@esotericsoftware/spine-core
Version:
The official Spine Runtimes for the web.
320 lines • 43.6 kB
JavaScript
/******************************************************************************
* Spine Runtimes License Agreement
* Last updated July 28, 2023. Replaces all prior versions.
*
* Copyright (c) 2013-2023, Esoteric Software LLC
*
* Integration of the Spine Runtimes into software or otherwise creating
* derivative works of the Spine Runtimes is permitted under the terms and
* conditions of Section 2 of the Spine Editor License Agreement:
* http://esotericsoftware.com/spine-editor-license
*
* Otherwise, it is permitted to integrate the Spine Runtimes into software or
* otherwise create derivative works of the Spine Runtimes (collectively,
* "Products"), provided that each user of the Products must obtain their own
* Spine Editor license and redistribution of the Products in any form must
* include this license and copyright notice.
*
* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE
* SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
import { TextureAtlas } from "./TextureAtlas.js";
export class AssetManagerBase {
pathPrefix = "";
textureLoader;
downloader;
assets = {};
errors = {};
toLoad = 0;
loaded = 0;
constructor(textureLoader, pathPrefix = "", downloader = new Downloader()) {
this.textureLoader = textureLoader;
this.pathPrefix = pathPrefix;
this.downloader = downloader;
}
start(path) {
this.toLoad++;
return this.pathPrefix + path;
}
success(callback, path, asset) {
this.toLoad--;
this.loaded++;
this.assets[path] = asset;
if (callback)
callback(path, asset);
}
error(callback, path, message) {
this.toLoad--;
this.loaded++;
this.errors[path] = message;
if (callback)
callback(path, message);
}
loadAll() {
let promise = new Promise((resolve, reject) => {
let check = () => {
if (this.isLoadingComplete()) {
if (this.hasErrors())
reject(this.errors);
else
resolve(this);
return;
}
requestAnimationFrame(check);
};
requestAnimationFrame(check);
});
return promise;
}
setRawDataURI(path, data) {
this.downloader.rawDataUris[this.pathPrefix + path] = data;
}
loadBinary(path, success = () => { }, error = () => { }) {
path = this.start(path);
this.downloader.downloadBinary(path, (data) => {
this.success(success, path, data);
}, (status, responseText) => {
this.error(error, path, `Couldn't load binary ${path}: status ${status}, ${responseText}`);
});
}
loadText(path, success = () => { }, error = () => { }) {
path = this.start(path);
this.downloader.downloadText(path, (data) => {
this.success(success, path, data);
}, (status, responseText) => {
this.error(error, path, `Couldn't load text ${path}: status ${status}, ${responseText}`);
});
}
loadJson(path, success = () => { }, error = () => { }) {
path = this.start(path);
this.downloader.downloadJson(path, (data) => {
this.success(success, path, data);
}, (status, responseText) => {
this.error(error, path, `Couldn't load JSON ${path}: status ${status}, ${responseText}`);
});
}
loadTexture(path, success = () => { }, error = () => { }) {
path = this.start(path);
let isBrowser = !!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document);
let isWebWorker = !isBrowser; // && typeof importScripts !== 'undefined';
if (isWebWorker) {
fetch(path, { mode: "cors" }).then((response) => {
if (response.ok)
return response.blob();
this.error(error, path, `Couldn't load image: ${path}`);
return null;
}).then((blob) => {
return blob ? createImageBitmap(blob, { premultiplyAlpha: "none", colorSpaceConversion: "none" }) : null;
}).then((bitmap) => {
if (bitmap)
this.success(success, path, this.textureLoader(bitmap));
});
}
else {
let image = new Image();
image.crossOrigin = "anonymous";
image.onload = () => {
this.success(success, path, this.textureLoader(image));
};
image.onerror = () => {
this.error(error, path, `Couldn't load image: ${path}`);
};
if (this.downloader.rawDataUris[path])
path = this.downloader.rawDataUris[path];
image.src = path;
}
}
loadTextureAtlas(path, success = () => { }, error = () => { }, fileAlias) {
let index = path.lastIndexOf("/");
let parent = index >= 0 ? path.substring(0, index + 1) : "";
path = this.start(path);
this.downloader.downloadText(path, (atlasText) => {
try {
let atlas = new TextureAtlas(atlasText);
let toLoad = atlas.pages.length, abort = false;
for (let page of atlas.pages) {
this.loadTexture(!fileAlias ? parent + page.name : fileAlias[page.name], (imagePath, texture) => {
if (!abort) {
page.setTexture(texture);
if (--toLoad == 0)
this.success(success, path, atlas);
}
}, (imagePath, message) => {
if (!abort)
this.error(error, path, `Couldn't load texture atlas ${path} page image: ${imagePath}`);
abort = true;
});
}
}
catch (e) {
this.error(error, path, `Couldn't parse texture atlas ${path}: ${e.message}`);
}
}, (status, responseText) => {
this.error(error, path, `Couldn't load texture atlas ${path}: status ${status}, ${responseText}`);
});
}
get(path) {
return this.assets[this.pathPrefix + path];
}
require(path) {
path = this.pathPrefix + path;
let asset = this.assets[path];
if (asset)
return asset;
let error = this.errors[path];
throw Error("Asset not found: " + path + (error ? "\n" + error : ""));
}
remove(path) {
path = this.pathPrefix + path;
let asset = this.assets[path];
if (asset.dispose)
asset.dispose();
delete this.assets[path];
return asset;
}
removeAll() {
for (let key in this.assets) {
let asset = this.assets[key];
if (asset.dispose)
asset.dispose();
}
this.assets = {};
}
isLoadingComplete() {
return this.toLoad == 0;
}
getToLoad() {
return this.toLoad;
}
getLoaded() {
return this.loaded;
}
dispose() {
this.removeAll();
}
hasErrors() {
return Object.keys(this.errors).length > 0;
}
getErrors() {
return this.errors;
}
}
export class Downloader {
callbacks = {};
rawDataUris = {};
dataUriToString(dataUri) {
if (!dataUri.startsWith("data:")) {
throw new Error("Not a data URI.");
}
let base64Idx = dataUri.indexOf("base64,");
if (base64Idx != -1) {
base64Idx += "base64,".length;
return atob(dataUri.substr(base64Idx));
}
else {
return dataUri.substr(dataUri.indexOf(",") + 1);
}
}
base64ToUint8Array(base64) {
var binary_string = window.atob(base64);
var len = binary_string.length;
var bytes = new Uint8Array(len);
for (var i = 0; i < len; i++) {
bytes[i] = binary_string.charCodeAt(i);
}
return bytes;
}
dataUriToUint8Array(dataUri) {
if (!dataUri.startsWith("data:")) {
throw new Error("Not a data URI.");
}
let base64Idx = dataUri.indexOf("base64,");
if (base64Idx == -1)
throw new Error("Not a binary data URI.");
base64Idx += "base64,".length;
return this.base64ToUint8Array(dataUri.substr(base64Idx));
}
downloadText(url, success, error) {
if (this.start(url, success, error))
return;
if (this.rawDataUris[url]) {
try {
let dataUri = this.rawDataUris[url];
this.finish(url, 200, this.dataUriToString(dataUri));
}
catch (e) {
this.finish(url, 400, JSON.stringify(e));
}
return;
}
let request = new XMLHttpRequest();
request.overrideMimeType("text/html");
request.open("GET", url, true);
let done = () => {
this.finish(url, request.status, request.responseText);
};
request.onload = done;
request.onerror = done;
request.send();
}
downloadJson(url, success, error) {
this.downloadText(url, (data) => {
success(JSON.parse(data));
}, error);
}
downloadBinary(url, success, error) {
if (this.start(url, success, error))
return;
if (this.rawDataUris[url]) {
try {
let dataUri = this.rawDataUris[url];
this.finish(url, 200, this.dataUriToUint8Array(dataUri));
}
catch (e) {
this.finish(url, 400, JSON.stringify(e));
}
return;
}
let request = new XMLHttpRequest();
request.open("GET", url, true);
request.responseType = "arraybuffer";
let onerror = () => {
this.finish(url, request.status, request.response);
};
request.onload = () => {
if (request.status == 200 || request.status == 0)
this.finish(url, 200, new Uint8Array(request.response));
else
onerror();
};
request.onerror = onerror;
request.send();
}
start(url, success, error) {
let callbacks = this.callbacks[url];
try {
if (callbacks)
return true;
this.callbacks[url] = callbacks = [];
}
finally {
callbacks.push(success, error);
}
}
finish(url, status, data) {
let callbacks = this.callbacks[url];
delete this.callbacks[url];
let args = status == 200 || status == 0 ? [data] : [status, data];
for (let i = args.length - 1, n = callbacks.length; i < n; i += 2)
callbacks[i].apply(null, args);
}
}
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* Spine Runtimes License Agreement\n * Last updated July 28, 2023. Replaces all prior versions.\n *\n * Copyright (c) 2013-2023, Esoteric Software LLC\n *\n * Integration of the Spine Runtimes into software or otherwise creating\n * derivative works of the Spine Runtimes is permitted under the terms and\n * conditions of Section 2 of the Spine Editor License Agreement:\n * http://esotericsoftware.com/spine-editor-license\n *\n * Otherwise, it is permitted to integrate the Spine Runtimes into software or\n * otherwise create derivative works of the Spine Runtimes (collectively,\n * \"Products\"), provided that each user of the Products must obtain their own\n * Spine Editor license and redistribution of the Products in any form must\n * include this license and copyright notice.\n *\n * THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC \"AS IS\" AND ANY\n * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED\n * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE\n * DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY\n * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES\n * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,\n * BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND\n * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE\n * SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n *****************************************************************************/\n\nimport { Texture } from \"./Texture.js\";\nimport { TextureAtlas } from \"./TextureAtlas.js\";\nimport { Disposable, StringMap } from \"./Utils.js\";\n\nexport class AssetManagerBase implements Disposable {\n\tprivate pathPrefix: string = \"\";\n\tprivate textureLoader: (image: HTMLImageElement | ImageBitmap) => Texture;\n\tprivate downloader: Downloader;\n\tprivate assets: StringMap<any> = {};\n\tprivate errors: StringMap<string> = {};\n\tprivate toLoad = 0;\n\tprivate loaded = 0;\n\n\tconstructor (textureLoader: (image: HTMLImageElement | ImageBitmap) => Texture, pathPrefix: string = \"\", downloader: Downloader = new Downloader()) {\n\t\tthis.textureLoader = textureLoader;\n\t\tthis.pathPrefix = pathPrefix;\n\t\tthis.downloader = downloader;\n\t}\n\n\tprivate start (path: string): string {\n\t\tthis.toLoad++;\n\t\treturn this.pathPrefix + path;\n\t}\n\n\tprivate success (callback: (path: string, data: any) => void, path: string, asset: any) {\n\t\tthis.toLoad--;\n\t\tthis.loaded++;\n\t\tthis.assets[path] = asset;\n\t\tif (callback) callback(path, asset);\n\t}\n\n\tprivate error (callback: (path: string, message: string) => void, path: string, message: string) {\n\t\tthis.toLoad--;\n\t\tthis.loaded++;\n\t\tthis.errors[path] = message;\n\t\tif (callback) callback(path, message);\n\t}\n\n\tloadAll () {\n\t\tlet promise = new Promise((resolve: (assetManager: AssetManagerBase) => void, reject: (errors: StringMap<string>) => void) => {\n\t\t\tlet check = () => {\n\t\t\t\tif (this.isLoadingComplete()) {\n\t\t\t\t\tif (this.hasErrors()) reject(this.errors);\n\t\t\t\t\telse resolve(this);\n\t\t\t\t\treturn;\n\t\t\t\t}\n\t\t\t\trequestAnimationFrame(check);\n\t\t\t}\n\t\t\trequestAnimationFrame(check);\n\t\t});\n\t\treturn promise;\n\t}\n\n\tsetRawDataURI (path: string, data: string) {\n\t\tthis.downloader.rawDataUris[this.pathPrefix + path] = data;\n\t}\n\n\tloadBinary (path: string,\n\t\tsuccess: (path: string, binary: Uint8Array) => void = () => { },\n\t\terror: (path: string, message: string) => void = () => { }) {\n\t\tpath = this.start(path);\n\n\t\tthis.downloader.downloadBinary(path, (data: Uint8Array): void => {\n\t\t\tthis.success(success, path, data);\n\t\t}, (status: number, responseText: string): void => {\n\t\t\tthis.error(error, path, `Couldn't load binary ${path}: status ${status}, ${responseText}`);\n\t\t});\n\t}\n\n\tloadText (path: string,\n\t\tsuccess: (path: string, text: string) => void = () => { },\n\t\terror: (path: string, message: string) => void = () => { }) {\n\t\tpath = this.start(path);\n\n\t\tthis.downloader.downloadText(path, (data: string): void => {\n\t\t\tthis.success(success, path, data);\n\t\t}, (status: number, responseText: string): void => {\n\t\t\tthis.error(error, path, `Couldn't load text ${path}: status ${status}, ${responseText}`);\n\t\t});\n\t}\n\n\tloadJson (path: string,\n\t\tsuccess: (path: string, object: object) => void = () => { },\n\t\terror: (path: string, message: string) => void = () => { }) {\n\t\tpath = this.start(path);\n\n\t\tthis.downloader.downloadJson(path, (data: object): void => {\n\t\t\tthis.success(success, path, data);\n\t\t}, (status: number, responseText: string): void => {\n\t\t\tthis.error(error, path, `Couldn't load JSON ${path}: status ${status}, ${responseText}`);\n\t\t});\n\t}\n\n\tloadTexture (path: string,\n\t\tsuccess: (path: string, texture: Texture) => void = () => { },\n\t\terror: (path: string, message: string) => void = () => { }) {\n\t\tpath = this.start(path);\n\n\t\tlet isBrowser = !!(typeof window !== 'undefined' && typeof navigator !== 'undefined' && window.document);\n\t\tlet isWebWorker = !isBrowser; // && typeof importScripts !== 'undefined';\n\t\tif (isWebWorker) {\n\t\t\tfetch(path, { mode: <RequestMode>\"cors\" }).then((response) => {\n\t\t\t\tif (response.ok) return response.blob();\n\t\t\t\tthis.error(error, path, `Couldn't load image: ${path}`);\n\t\t\t\treturn null;\n\t\t\t}).then((blob) => {\n\t\t\t\treturn blob ? createImageBitmap(blob, { premultiplyAlpha: \"none\", colorSpaceConversion: \"none\" }) : null;\n\t\t\t}).then((bitmap) => {\n\t\t\t\tif (bitmap) this.success(success, path, this.textureLoader(bitmap));\n\t\t\t});\n\t\t} else {\n\t\t\tlet image = new Image();\n\t\t\timage.crossOrigin = \"anonymous\";\n\t\t\timage.onload = () => {\n\t\t\t\tthis.success(success, path, this.textureLoader(image));\n\t\t\t};\n\t\t\timage.onerror = () => {\n\t\t\t\tthis.error(error, path, `Couldn't load image: ${path}`);\n\t\t\t};\n\t\t\tif (this.downloader.rawDataUris[path]) path = this.downloader.rawDataUris[path];\n\t\t\timage.src = path;\n\t\t}\n\t}\n\n\tloadTextureAtlas (path: string,\n\t\tsuccess: (path: string, atlas: TextureAtlas) => void = () => { },\n\t\terror: (path: string, message: string) => void = () => { },\n\t\tfileAlias?: { [keyword: string]: string }\n\t) {\n\t\tlet index = path.lastIndexOf(\"/\");\n\t\tlet parent = index >= 0 ? path.substring(0, index + 1) : \"\";\n\t\tpath = this.start(path);\n\n\t\tthis.downloader.downloadText(path, (atlasText: string): void => {\n\t\t\ttry {\n\t\t\t\tlet atlas = new TextureAtlas(atlasText);\n\t\t\t\tlet toLoad = atlas.pages.length, abort = false;\n\t\t\t\tfor (let page of atlas.pages) {\n\t\t\t\t\tthis.loadTexture(!fileAlias ? parent + page.name : fileAlias[page.name!],\n\t\t\t\t\t\t(imagePath: string, texture: Texture) => {\n\t\t\t\t\t\t\tif (!abort) {\n\t\t\t\t\t\t\t\tpage.setTexture(texture);\n\t\t\t\t\t\t\t\tif (--toLoad == 0) this.success(success, path, atlas);\n\t\t\t\t\t\t\t}\n\t\t\t\t\t\t},\n\t\t\t\t\t\t(imagePath: string, message: string) => {\n\t\t\t\t\t\t\tif (!abort) this.error(error, path, `Couldn't load texture atlas ${path} page image: ${imagePath}`);\n\t\t\t\t\t\t\tabort = true;\n\t\t\t\t\t\t}\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t} catch (e) {\n\t\t\t\tthis.error(error, path, `Couldn't parse texture atlas ${path}: ${(e as any).message}`);\n\t\t\t}\n\t\t}, (status: number, responseText: string): void => {\n\t\t\tthis.error(error, path, `Couldn't load texture atlas ${path}: status ${status}, ${responseText}`);\n\t\t});\n\t}\n\n\tget (path: string) {\n\t\treturn this.assets[this.pathPrefix + path];\n\t}\n\n\trequire (path: string) {\n\t\tpath = this.pathPrefix + path;\n\t\tlet asset = this.assets[path];\n\t\tif (asset) return asset;\n\t\tlet error = this.errors[path];\n\t\tthrow Error(\"Asset not found: \" + path + (error ? \"\\n\" + error : \"\"));\n\t}\n\n\tremove (path: string) {\n\t\tpath = this.pathPrefix + path;\n\t\tlet asset = this.assets[path];\n\t\tif ((<any>asset).dispose) (<any>asset).dispose();\n\t\tdelete this.assets[path];\n\t\treturn asset;\n\t}\n\n\tremoveAll () {\n\t\tfor (let key in this.assets) {\n\t\t\tlet asset = this.assets[key];\n\t\t\tif ((<any>asset).dispose) (<any>asset).dispose();\n\t\t}\n\t\tthis.assets = {};\n\t}\n\n\tisLoadingComplete (): boolean {\n\t\treturn this.toLoad == 0;\n\t}\n\n\tgetToLoad (): number {\n\t\treturn this.toLoad;\n\t}\n\n\tgetLoaded (): number {\n\t\treturn this.loaded;\n\t}\n\n\tdispose () {\n\t\tthis.removeAll();\n\t}\n\n\thasErrors () {\n\t\treturn Object.keys(this.errors).length > 0;\n\t}\n\n\tgetErrors () {\n\t\treturn this.errors;\n\t}\n}\n\nexport class Downloader {\n\tprivate callbacks: StringMap<Array<Function>> = {};\n\trawDataUris: StringMap<string> = {};\n\n\tdataUriToString (dataUri: string) {\n\t\tif (!dataUri.startsWith(\"data:\")) {\n\t\t\tthrow new Error(\"Not a data URI.\");\n\t\t}\n\n\t\tlet base64Idx = dataUri.indexOf(\"base64,\");\n\t\tif (base64Idx != -1) {\n\t\t\tbase64Idx += \"base64,\".length;\n\t\t\treturn atob(dataUri.substr(base64Idx));\n\t\t} else {\n\t\t\treturn dataUri.substr(dataUri.indexOf(\",\") + 1);\n\t\t}\n\t}\n\n\tbase64ToUint8Array (base64: string) {\n\t\tvar binary_string = window.atob(base64);\n\t\tvar len = binary_string.length;\n\t\tvar bytes = new Uint8Array(len);\n\t\tfor (var i = 0; i < len; i++) {\n\t\t\tbytes[i] = binary_string.charCodeAt(i);\n\t\t}\n\t\treturn bytes;\n\t}\n\n\tdataUriToUint8Array (dataUri: string) {\n\t\tif (!dataUri.startsWith(\"data:\")) {\n\t\t\tthrow new Error(\"Not a data URI.\");\n\t\t}\n\n\t\tlet base64Idx = dataUri.indexOf(\"base64,\");\n\t\tif (base64Idx == -1) throw new Error(\"Not a binary data URI.\");\n\t\tbase64Idx += \"base64,\".length;\n\t\treturn this.base64ToUint8Array(dataUri.substr(base64Idx));\n\t}\n\n\tdownloadText (url: string, success: (data: string) => void, error: (status: number, responseText: string) => void) {\n\t\tif (this.start(url, success, error)) return;\n\t\tif (this.rawDataUris[url]) {\n\t\t\ttry {\n\t\t\t\tlet dataUri = this.rawDataUris[url];\n\t\t\t\tthis.finish(url, 200, this.dataUriToString(dataUri));\n\t\t\t} catch (e) {\n\t\t\t\tthis.finish(url, 400, JSON.stringify(e));\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\t\tlet request = new XMLHttpRequest();\n\t\trequest.overrideMimeType(\"text/html\");\n\t\trequest.open(\"GET\", url, true);\n\t\tlet done = () => {\n\t\t\tthis.finish(url, request.status, request.responseText);\n\t\t};\n\t\trequest.onload = done;\n\t\trequest.onerror = done;\n\t\trequest.send();\n\t}\n\n\tdownloadJson (url: string, success: (data: object) => void, error: (status: number, responseText: string) => void) {\n\t\tthis.downloadText(url, (data: string): void => {\n\t\t\tsuccess(JSON.parse(data));\n\t\t}, error);\n\t}\n\n\tdownloadBinary (url: string, success: (data: Uint8Array) => void, error: (status: number, responseText: string) => void) {\n\t\tif (this.start(url, success, error)) return;\n\t\tif (this.rawDataUris[url]) {\n\t\t\ttry {\n\t\t\t\tlet dataUri = this.rawDataUris[url];\n\t\t\t\tthis.finish(url, 200, this.dataUriToUint8Array(dataUri));\n\t\t\t} catch (e) {\n\t\t\t\tthis.finish(url, 400, JSON.stringify(e));\n\t\t\t}\n\t\t\treturn;\n\t\t}\n\t\tlet request = new XMLHttpRequest();\n\t\trequest.open(\"GET\", url, true);\n\t\trequest.responseType = \"arraybuffer\";\n\t\tlet onerror = () => {\n\t\t\tthis.finish(url, request.status, request.response);\n\t\t};\n\t\trequest.onload = () => {\n\t\t\tif (request.status == 200 || request.status == 0)\n\t\t\t\tthis.finish(url, 200, new Uint8Array(request.response as ArrayBuffer));\n\t\t\telse\n\t\t\t\tonerror();\n\t\t};\n\t\trequest.onerror = onerror;\n\t\trequest.send();\n\t}\n\n\tprivate start (url: string, success: any, error: any) {\n\t\tlet callbacks = this.callbacks[url];\n\t\ttry {\n\t\t\tif (callbacks) return true;\n\t\t\tthis.callbacks[url] = callbacks = [];\n\t\t} finally {\n\t\t\tcallbacks.push(success, error);\n\t\t}\n\t}\n\n\tprivate finish (url: string, status: number, data: any) {\n\t\tlet callbacks = this.callbacks[url];\n\t\tdelete this.callbacks[url];\n\t\tlet args = status == 200 || status == 0 ? [data] : [status, data];\n\t\tfor (let i = args.length - 1, n = callbacks.length; i < n; i += 2)\n\t\t\tcallbacks[i].apply(null, args);\n\t}\n}\n"]}