144 lines
6.9 KiB
JavaScript
144 lines
6.9 KiB
JavaScript
"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __generator = (this && this.__generator) || function (thisArg, body) {
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var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
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return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
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function verb(n) { return function (v) { return step([n, v]); }; }
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function step(op) {
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if (f) throw new TypeError("Generator is already executing.");
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while (g && (g = 0, op[0] && (_ = 0)), _) try {
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if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
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if (y = 0, t) op = [op[0] & 2, t.value];
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switch (op[0]) {
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case 0: case 1: t = op; break;
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case 4: _.label++; return { value: op[1], done: false };
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case 5: _.label++; y = op[1]; op = [0]; continue;
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case 7: op = _.ops.pop(); _.trys.pop(); continue;
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default:
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if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
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if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
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if (t[2]) _.ops.pop();
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_.trys.pop(); continue;
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}
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op = body.call(thisArg, _);
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} catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
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if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
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}
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.resourceToDataURL = exports.fetchAsDataURL = exports.makeDataUrl = exports.isDataUrl = void 0;
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function getContentFromDataUrl(dataURL) {
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return dataURL.split(/,/)[1];
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}
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function isDataUrl(url) {
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return url.search(/^(data:)/) !== -1;
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}
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exports.isDataUrl = isDataUrl;
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function makeDataUrl(content, mimeType) {
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return "data:".concat(mimeType, ";base64,").concat(content);
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}
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exports.makeDataUrl = makeDataUrl;
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function fetchAsDataURL(url, init, process) {
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return __awaiter(this, void 0, void 0, function () {
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var res, blob;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0: return [4 /*yield*/, fetch(url, init)];
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case 1:
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res = _a.sent();
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if (res.status === 404) {
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throw new Error("Resource \"".concat(res.url, "\" not found"));
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}
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return [4 /*yield*/, res.blob()];
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case 2:
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blob = _a.sent();
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return [2 /*return*/, new Promise(function (resolve, reject) {
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var reader = new FileReader();
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reader.onerror = reject;
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reader.onloadend = function () {
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try {
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resolve(process({ res: res, result: reader.result }));
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}
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catch (error) {
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reject(error);
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}
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};
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reader.readAsDataURL(blob);
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})];
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}
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});
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});
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}
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exports.fetchAsDataURL = fetchAsDataURL;
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var cache = {};
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function getCacheKey(url, contentType, includeQueryParams) {
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var key = url.replace(/\?.*/, '');
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if (includeQueryParams) {
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key = url;
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}
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// font resource
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if (/ttf|otf|eot|woff2?/i.test(key)) {
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key = key.replace(/.*\//, '');
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}
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return contentType ? "[".concat(contentType, "]").concat(key) : key;
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}
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function resourceToDataURL(resourceUrl, contentType, options) {
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return __awaiter(this, void 0, void 0, function () {
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var cacheKey, dataURL, content, error_1, msg;
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return __generator(this, function (_a) {
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switch (_a.label) {
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case 0:
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cacheKey = getCacheKey(resourceUrl, contentType, options.includeQueryParams);
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if (cache[cacheKey] != null) {
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return [2 /*return*/, cache[cacheKey]];
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}
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// ref: https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest#Bypassing_the_cache
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if (options.cacheBust) {
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// eslint-disable-next-line no-param-reassign
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resourceUrl += (/\?/.test(resourceUrl) ? '&' : '?') + new Date().getTime();
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}
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_a.label = 1;
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case 1:
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_a.trys.push([1, 3, , 4]);
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return [4 /*yield*/, fetchAsDataURL(resourceUrl, options.fetchRequestInit, function (_a) {
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var res = _a.res, result = _a.result;
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if (!contentType) {
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// eslint-disable-next-line no-param-reassign
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contentType = res.headers.get('Content-Type') || '';
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}
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return getContentFromDataUrl(result);
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})];
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case 2:
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content = _a.sent();
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dataURL = makeDataUrl(content, contentType);
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return [3 /*break*/, 4];
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case 3:
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error_1 = _a.sent();
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dataURL = options.imagePlaceholder || '';
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msg = "Failed to fetch resource: ".concat(resourceUrl);
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if (error_1) {
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msg = typeof error_1 === 'string' ? error_1 : error_1.message;
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}
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if (msg) {
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console.warn(msg);
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}
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return [3 /*break*/, 4];
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case 4:
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cache[cacheKey] = dataURL;
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return [2 /*return*/, dataURL];
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}
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});
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});
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}
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exports.resourceToDataURL = resourceToDataURL;
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//# sourceMappingURL=dataurl.js.map
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