Scale page content

[JNK90]

I added two functions to the PDFPage to scale the content and the annots. This enables to resize the content and annots without violating private access modifiers. The code is inspired by the Resizer Example.

[Hopding]

This sounds neat! Thanks for working on it @JNK90 🙂

I appreciate you adding good doc comments as well. That's something a lot of folks seem to forget about, haha.

In addition to my change request, can you:

• Explain a bit more about how this works? Please include screenshots/examples.
• Update one or two integration tests to showcase this behavior.

[JNK90]

@Hopding I have added integration tests for node and web (I have problems to run the other environments on my system). I also replaced .forEach() and .asArray() calls.

To scale the content the method scaleContent(x, y) simply applys the scale-Operator to the contentstream.
To scale the annots the method scaleAnnots(x, y) loops over all annots ('RD', 'CL', 'Vertices', 'QuadPoints', 'L', 'Rect', 'InkList') and multiplies the PDFNumbers of an annot with x or y as the factor.

I have edited a PDF and added, text, comments, shapes, highlights to test the scaling.
Original:

After scaling content by 50%:

After scaling content and annots by 50%:

[Hopding]

Great explanation, much appreciated @JNK90! Now that I have a good understanding of what this PR is for, I'm confident saying it'll be a heavily used feature!

I've requested a few changes below. Once these are addressed we should be good to go!

[Hopding]

@JNK90 I see you marked all my comments as resolved, but I don't see any of the changes I requested in the diff? Did you forget to push your work? Or are you still working on this?

[JNK90]

@Hopding I pushed my changes to the wrong branch of my fork 🤓. All changes are now in the right branch.

[Hopding]

@JNK90 Ah, that would explain it!

[Hopding]

Looks great! Excited to get this released!