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-rw-r--r--browser/extensions/screenshots/blobConverters.js48
1 files changed, 48 insertions, 0 deletions
diff --git a/browser/extensions/screenshots/blobConverters.js b/browser/extensions/screenshots/blobConverters.js
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+++ b/browser/extensions/screenshots/blobConverters.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+this.blobConverters = (function () {
+ const exports = {};
+
+ exports.dataUrlToBlob = function (url) {
+ const binary = atob(url.split(",", 2)[1]);
+ let contentType = exports.getTypeFromDataUrl(url);
+ if (contentType !== "image/png" && contentType !== "image/jpeg") {
+ contentType = "image/png";
+ }
+ const data = Uint8Array.from(binary, char => char.charCodeAt(0));
+ const blob = new Blob([data], { type: contentType });
+ return blob;
+ };
+
+ exports.getTypeFromDataUrl = function (url) {
+ let contentType = url.split(",", 1)[0];
+ contentType = contentType.split(";", 1)[0];
+ contentType = contentType.split(":", 2)[1];
+ return contentType;
+ };
+
+ exports.blobToArray = function (blob) {
+ return new Promise((resolve, reject) => {
+ const reader = new FileReader();
+ reader.addEventListener("loadend", function () {
+ resolve(reader.result);
+ });
+ reader.readAsArrayBuffer(blob);
+ });
+ };
+
+ exports.blobToDataUrl = function (blob) {
+ return new Promise((resolve, reject) => {
+ const reader = new FileReader();
+ reader.addEventListener("loadend", function () {
+ resolve(reader.result);
+ });
+ reader.readAsDataURL(blob);
+ });
+ };
+
+ return exports;
+})();
+null;