This update covers 3 commits:

9e3adb5ec70f62ecc9dd7c2b3cb15a02286b3d45 by Tim van der Meij

https://github.com/mozilla/pdf.js/commit/9e3adb5ec70f62ecc9dd7c2b3cb15a02286b3d45
Authored: 2023-01-08 14:49:20 +0100
Committed: 2023-01-14 15:09:58 +0100

Implement unit tests for the numberToString utility function

Files Modified:

• test/unit/core_utils_spec.js

a6dfcc89fab6a82000b3bf07a851a1b913190fc5 by Tim van der Meij

https://github.com/mozilla/pdf.js/commit/a6dfcc89fab6a82000b3bf07a851a1b913190fc5
Authored: 2023-01-08 14:43:07 +0100
Committed: 2023-01-14 15:09:58 +0100

Implement unit tests for the recoverJsURL utility function

Files Modified:

• test/unit/core_utils_spec.js

cee97fcd15cda22953f1eacf42f82a0039f362b7 by Jonas Jenwald

https://github.com/mozilla/pdf.js/commit/cee97fcd15cda22953f1eacf42f82a0039f362b7
Authored: 2023-01-11 22:03:36 +0100
Committed: 2023-01-12 13:59:21 +0100

[api-minor] Enabling transferring of data fetched with the PDFFetchStream implementation

Note how in the API we're transferring the PDF data that's fetched over the network[1]:

• https://github.com/mozilla/pdf.js/blob/f28bf23a314e36d9e255037f5716ae1eb8e16fbf/src/display/api.js#L2467-L2480
• https://github.com/mozilla/pdf.js/blob/f28bf23a314e36d9e255037f5716ae1eb8e16fbf/src/display/api.js#L2553-L2564

To support that functionality we have the PDFDataTransportStream, PDFFetchStream, PDFNetworkStream, and PDFNodeStream implementations. Here these stream-implementations vary slightly in how they handle ArrayBuffers internally, w.r.t. transferring or copying the data:

• In PDFDataTransportStream we optionally, after PR 15908, allow transferring of the PDF data as provided externally (used e.g. in the Firefox PDF Viewer).
• In PDFFetchStream we're currenly always copying the PDF data returned by the Fetch API, which seems unnecessary. As discussed in PR 15908, it'd seem very weird if this sort of browser API didn't allow transferring of the returned data.
• In PDFNetworkStream we're already, since many years, transferring the PDF data returned by the XMLHttpRequest functionality. Note how the getArrayBuffer helper function simply returns an ArrayBuffer response as-is.
• In PDFNodeStream we're currently copying the PDF data, however this is unfortunately necessary since Node.js returns data as a Buffer object[2].

Given that the PDFNetworkStream has been, indirectly, supporting transferring of PDF data for years it would seem really strange if this didn't also apply to the PDFFetchStream-implementation.
Hence this patch simply enables transferring of PDF data, when accessed using the Fetch API, unconditionally to help reduced main-thread memory usage since the PDFFetchStream-implementation is used by default in browsers (for the GENERIC build).

[1] As opposed to PDF data being provided as e.g. a TypedArray when calling getDocument in the API.

[2] This is a "special" Node.js object, see https://nodejs.org/api/buffer.html#buffer, which doesn't exist in browsers.

Files Modified:

• src/display/api.js
• src/display/fetch_stream.js
• src/display/network.js

I've submitted a try run for this commit: https://treeherder.mozilla.org/jobs?repo=try&revision=6853129edf3dc9945afa6597077804eb0ec7d5da

The try push is done, we found jobs with unclassified failures.

Known Issues (From Push Health):

 dom/canvas/test/crossorigin/test_video_crossorigin.html | application terminated with exit code 1
	- 1 of 4 failed on the same (retriggered) task
	- test-windows10-32-2004-qr/debug-mochitest-plain-gpu (a_78BTJOR1qbdhh7KfjxIQ)

Force-terminating active process(es).
	- 1 of 4 failed on the same (retriggered) task
	- test-windows10-32-2004-qr/debug-mochitest-plain-gpu (a_78BTJOR1qbdhh7KfjxIQ)

Needs Investigation (From Push Health):

No tests were found for flavor 'plain' and the following manifest filters:

skip_if, run_if, fail_if, subsuite(name=None), tags(['condprof']), pathprefix(['toolkit/components/pdfjs/test'])

Make sure the test paths (if any) are spelt correctly and the corresponding
--flavor and --subsuite are being used. See mach mochitest --help for a
list of valid flavors.
- 2 of 2 failed on different tasks
- test-linux1804-64-qr/opt-mochitest-plain-condprof-1 (aafLGXFmRamcUxvmdROhyQ)
- test-windows10-64-2004-qr/opt-mochitest-plain-condprof-1 (VRI0yDIWQ9WI6UFeUpu_bA)

dom/canvas/test/crossorigin/test_video_crossorigin.html
	- 1 of 4 failed on the same (retriggered) task
	- test-windows10-32-2004-qr/debug-mochitest-plain-gpu (a_78BTJOR1qbdhh7KfjxIQ)

minidumpwriter exited with status: 1
	- 1 of 4 failed on the same (retriggered) task
	- test-windows10-32-2004-qr/debug-mochitest-plain-gpu (a_78BTJOR1qbdhh7KfjxIQ)

Needs Investigation (Other Failed Jobs):
test-linux1804-64-qr/debug-mochitest-devtools-chrome-swr-1
- 4 of 4 failed on the same (retriggered) task (df2Rmy-QRGCIcd0UNdujWw, Q7NSd8-tQnWt7-TwMoO2Aw, EeoegRWrRgimxNP2IzkeGA, XLwl5IeDT2K_KmyASE7dEA)
test-linux1804-64-qr/debug-mochitest-devtools-chrome-1
- 4 of 4 failed on the same (retriggered) task (YMgOWU53SRC-2udbPuLtXg, EVtDLJ0jTIa5kF83eDKTZQ, WEUYo4XBTKOJyg6TO5D4Ng, LxhhlTu-S2qzwpqVeqn5qA)
test-windows10-64-2004-qr/debug-mochitest-devtools-chrome-1
- 4 of 4 failed on the same (retriggered) task (BLYoUYJlQeKXYHbmB0JdFA, TvsUoX2WR-mnqkXdb1qaTw, JcLJrk5bR4KBuQlv_d1w6w, T8Qc4rO_QsG9S5jQ-9LaUw)
test-macosx1015-64-qr/debug-mochitest-devtools-chrome-spi-nw-1
- 4 of 4 failed on the same (retriggered) task (BTUc_kyGSZ6V8mBXlELgMg, fokRfLXvSgC2p_i-qXV3kA, NzZLlo_XRpimlpGbUY2pxQ, K7zNC1E9RqWS7LRYEye-Lg)
test-windows10-64-2004-qr/debug-mochitest-devtools-chrome-spi-nw-1
- 4 of 4 failed on the same (retriggered) task (YUKDqr9fTpGYni_nuS6Lkg, a63JZ2J0RvCa4sTXzC9lfQ, ZhaHYJGiQ3CauOADMzY6HQ, ZA9NHqBsQiWwUDzvtCXzbA)
test-macosx1015-64-qr/debug-mochitest-devtools-chrome-1
- 4 of 4 failed on the same (retriggered) task (C72Tn-ucRvmCF1yLkqStSw, V6-XgnabQxCb9NaPWYGCFQ, Jjf7WDEGRbKaguIV8t2tzA, P3InqYR2QXCiaLQ_KlTwnA)
test-linux1804-64-qr/debug-mochitest-devtools-chrome-spi-nw-1
- 4 of 4 failed on the same (retriggered) task (AuOgRMgMReCJNHuhbB4hbw, GzhVXhQCRcWuWUDjVu1b-Q, ZtqKMkGVSY-YChoFBQ1wWQ, MzlvX5dbQoyQ6t5huOm4CA)

These failures could mean that the library update changed something and caused
tests to fail. You'll need to review them yourself and decide where to go from here.

In either event, I have done all I can and you will need to take it from here. If you
don't want to land my patch, you can replicate it locally for editing with
./mach vendor toolkit/components/pdfjs/moz.yaml

When reviewing, please note that this is external code, which needs a full and
careful inspection - not a rubberstamp.

This bug is being closed because a newer revision of the library is available.
This bug will be marked as a duplicate of it (because although this bug is older, it is superseded by the newer one).