For now it's just possible to create a single pdf in selecting some pages in different pdf sources.
The merge is for now pretty basic (it's why it's still a WIP) none of these data are merged for now:
- the struct trees
- the page labels
- the outlines
- named destinations
For there are 2 new ref tests where some new pdfs are created: one with some extracted pages and an other
one (encrypted) which is just rewritten.
The ref images are generated from the original pdfs in selecting the page we want and the new images are
taken from the generated pdfs.
Metric-compatible font with Times New Roman created by ParaType, based on
their serif font PT Serif, released under OFL-1.1 license.
https://www.paratype.com/fonts/pt/pt-astra-serif
Signed-off-by: Coelacanthus <uwu@coelacanthus.name>
It'll help to make math equations "visible" for screen readers.
MS Office has a specific way to add some MathML code to struc tree leaf
and this patch handles it.
Follow up on https://github.com/mozilla/pdf.js/pull/20197,
This serializes pattern data into an ArrayBuffer which is
then transferred from the worker to the main thread.
It sets up the stage for us to eventually switch to a
SharedArrayBuffer in the future.
This PR serializes font data into an ArrayBuffer
that is then transfered from the worker to the
main thread. It's more efficient than the current
solution which clones the "export data" object
which includes the font data as a Uint8Array.
It prepares us to switch to a SharedArrayBuffer
in the future, which would allow us to share
the font data with multiple agents, which would be
crucial for the upcoming "renderer" worker.
Ensure that negative “LW” entries in an ExtGState dictionary are converted to their absolute values when the “gs” operator is processed.
See PR https://github.com/mozilla/pdf.js/pull/19639
This is a precursor to moving the call into a
worker thread to let us use `OffscreenCanvas`. The
current position wouldn't work since we make
transformations to the canvas object after the
getContext call, which isn't allowed for
OffscreenCanvas. Also it isn't allowed to clone or
`transferControlToOffscreen` the canvas after the
`getContext` call.
On mac, the pdf backend used when printing is using the cid from the font,
so if a char has null cid then it's equivalent to .notdef and some viewers
don't display it.
Given that this file represents the official API, it's difficult to avoid it becoming fairly large as we add new functionality. However, it also contains a couple of smaller (and internal) helpers that we can move into a new utils-file.
Also, we inline the `DEFAULT_RANGE_CHUNK_SIZE` constant since it's only used *once* and its value has never been changed in over a decade.
This allows us to simply invoke `PDFWorker.create` unconditionally from the `getDocument` function, without having to manually check if a global `workerPort` is available first.
Currently *some* of the links[1] on page three of the `issue19835.pdf` test-case aren't clickable, since the destination (of the LinkAnnotation) becomes empty.
The reason is that these destinations include the character `\x1b`, which is interpreted as the start of a Unicode escape sequence specifying the language of the string; please refer to section [7.9.2.2 Text String Type](https://opensource.adobe.com/dc-acrobat-sdk-docs/pdfstandards/PDF32000_2008.pdf#G6.1957385) in the PDF specification.
Hence it seems that we need a way to optionally disable that behaviour, to avoid a "badly" formatted string from becoming empty (or truncated), at least for cases where we are:
- Parsing named destinations[2] and URLs.
- Handling "strings" that are actually /Name-instances.
- Building a lookup Object/Map based on some PDF data-structure.
*NOTE:* The issue that prompted this patch is obviously related to destinations, however I've gone through the `src/core/` folder and updated various other `stringToPDFString` call-sites that (directly or indirectly) fit the categories listed above.
---
[1] Try clicking on anything on the line containing "Item 7A. Quantitative and Qualitative Disclosures About Market Risk 27".
[2] Unfortunately just skipping `stringToPDFString` in this case would cause other issues, such as the named destination becoming "unusable" in the viewer; see e.g. issues 14847 and 14864.
In the referenced PDF document the keys, in the /Dests dictionary, need to account for PDFDocEncoding.
To improve destination handling in general we'll now unconditionally fallback to always checking all destinations.
In Webpack version `5.99.0` the way that `export` statements are handled was changed slightly, with much less boilerplate code being generated, which unfortunately breaks our `tweakWebpackOutput` function that's used to expose the exported properties globally and that e.g. the viewer depends upon.
Given that we were depending on formatting that should most likely be viewed as nothing more than an internal implementation detail in Webpack, we instead work-around this by manually defining the structures that were previously generated.
Obviously this will lead to a tiny bit more manual work in the future, however we don't change the API-surface often enough that it should be a big issue *and* the relevant unit-tests are updated such that it shouldn't be possible to break this.
*NOTE:* In the future we might want to consider no longer using global properties like this, and instead rely only on proper `export`s throughout the code-base.
However changing this would likely be non-trivial (given edge-cases), and it'd be an `api-major` change, so let's just do the minimal amount of work to unblock Webpack updates for now.
These `getAll` methods are not used anywhere within the PDF.js code-base, outside of tests, and were mostly added (speculatively) for third-party users.
To still allow access to the same data we instead introduce iterators on these classes, which (slightly) shortens the code and allows us to remove the `objectFromMap` helper function.
A summary of the changes in this patch:
- Replace the `getAll` methods with iterators in the following classes: `AnnotationStorage`, `Metadata`, and `OptionalContentGroup`.
- Change, and also re-name, `AnnotationStorage.prototype.setAll` into a test-only method since it's not used elsewhere.
- Remove the `Metadata.prototype.has` method, since it's only used in tests and can be trivially replaced by calling `Metadata.prototype.get` and checking if the returned value is `null`.
