927e50f5d4
At this point in time all browsers, and also Node.js, support standard `import`/`export` statements and we can now finally consider outputting modern JavaScript modules in the builds.[1] In order for this to work we can *only* use proper `import`/`export` statements throughout the main code-base, and (as expected) our Node.js support made this much more complicated since both the official builds and the GitHub Actions-based tests must keep working.[2] One remaining issue is that the `pdf.scripting.js` file cannot be built as a JavaScript module, since doing so breaks PDF scripting. Note that my initial goal was to try and split these changes into a couple of commits, however that unfortunately didn't really work since it turned out to be difficult for smaller patches to work correctly and pass (all) tests that way.[3] This is a classic case of every change requiring a couple of other changes, with each of those changes requiring further changes in turn and the size/scope quickly increasing as a result. One possible "issue" with these changes is that we'll now only output JavaScript modules in the builds, which could perhaps be a problem with older tools. However it unfortunately seems far too complicated/time-consuming for us to attempt to support both the old and modern module formats, hence the alternative would be to do "nothing" here and just keep our "old" builds.[4] --- [1] The final blocker was module support in workers in Firefox, which was implemented in Firefox 114; please see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import#browser_compatibility [2] It's probably possible to further improve/simplify especially the Node.js-specific code, but it does appear to work as-is. [3] Having partially "broken" patches, that fail tests, as part of the commit history is *really not* a good idea in general. [4] Outputting JavaScript modules was first requested almost five years ago, see issue 10317, and nowadays there *should* be much better support for JavaScript modules in various tools.
74 lines
2.1 KiB
JavaScript
74 lines
2.1 KiB
JavaScript
/* Copyright 2020 Mozilla Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { getPdfFilenameFromUrl } from "pdfjs-lib";
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async function docProperties(pdfDocument) {
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const url = "",
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baseUrl = url.split("#")[0];
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// eslint-disable-next-line prefer-const
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let { info, metadata, contentDispositionFilename, contentLength } =
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await pdfDocument.getMetadata();
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if (!contentLength) {
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const { length } = await pdfDocument.getDownloadInfo();
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contentLength = length;
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}
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return {
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...info,
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baseURL: baseUrl,
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filesize: contentLength,
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filename: contentDispositionFilename || getPdfFilenameFromUrl(url),
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metadata: metadata?.getRaw(),
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authors: metadata?.get("dc:creator"),
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numPages: pdfDocument.numPages,
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URL: url,
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};
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}
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class GenericScripting {
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constructor(sandboxBundleSrc) {
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this._ready = new Promise((resolve, reject) => {
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const sandbox =
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typeof PDFJSDev === "undefined"
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? import(sandboxBundleSrc) // eslint-disable-line no-unsanitized/method
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: __non_webpack_import__(sandboxBundleSrc); // eslint-disable-line no-undef
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sandbox
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.then(pdfjsSandbox => {
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resolve(pdfjsSandbox.QuickJSSandbox());
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})
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.catch(reject);
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});
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}
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async createSandbox(data) {
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const sandbox = await this._ready;
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sandbox.create(data);
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}
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async dispatchEventInSandbox(event) {
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const sandbox = await this._ready;
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setTimeout(() => sandbox.dispatchEvent(event), 0);
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}
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async destroySandbox() {
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const sandbox = await this._ready;
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sandbox.nukeSandbox();
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}
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}
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export { docProperties, GenericScripting };
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