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web/generic_scripting.js

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+/* Copyright 2020 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { getPdfFilenameFromUrl } from "pdfjs-lib";
+
+async function docProperties(pdfDocument) {
+  const url = "",
+    baseUrl = "";
+  const { info, metadata, contentDispositionFilename, contentLength } =
+    await pdfDocument.getMetadata();
+
+  return {
+    ...info,
+    baseURL: baseUrl,
+    filesize: contentLength || (await pdfDocument.getDownloadInfo()).length,
+    filename: contentDispositionFilename || getPdfFilenameFromUrl(url),
+    metadata: metadata?.getRaw(),
+    authors: metadata?.get("dc:creator"),
+    numPages: pdfDocument.numPages,
+    URL: url,
+  };
+}
+
+class GenericScripting {
+  constructor(sandboxBundleSrc) {
+    this._ready = new Promise((resolve, reject) => {
+      const sandbox =
+        typeof PDFJSDev === "undefined"
+          ? import(sandboxBundleSrc) // eslint-disable-line no-unsanitized/method
+          : __raw_import__(sandboxBundleSrc);
+      sandbox
+        .then(pdfjsSandbox => {
+          resolve(pdfjsSandbox.QuickJSSandbox());
+        })
+        .catch(reject);
+    });
+  }
+
+  async createSandbox(data) {
+    const sandbox = await this._ready;
+    sandbox.create(data);
+  }
+
+  async dispatchEventInSandbox(event) {
+    const sandbox = await this._ready;
+    setTimeout(() => sandbox.dispatchEvent(event), 0);
+  }
+
+  async destroySandbox() {
+    const sandbox = await this._ready;
+    sandbox.nukeSandbox();
+  }
+}
+
+export { docProperties, GenericScripting };