Bug 177841 – Printing a PDF from an iframe crops bottom of the PDF

• Component: PDF
• Status: NEW

[David Alan Hjelle]

Created attachment 322587 [details]
actual print preview

# Steps to Reproduce

1. Go to https://dahjelle.github.io/pdf-test/
2. Look at the print preview dialog.


# Expected Behavior

The bottom line of the PDF should not be cropped off. (See attached expected.png, taken from opening the PDF in its own tab instead of an iframe.)

# Actual Behavior

The bottom line of the PDF is cropped off.

# Notes

This does not happen if you open the PDF at https://dahjelle.github.io/pdf-test/sample.pdf directly and print from there.

[David Alan Hjelle]

Created attachment 322588 [details]
expected print preview

[David Alan Hjelle]

This sounds similar to https://bugs.webkit.org/show_bug.cgi?id=57747, but I'm not sure it is related.

[Alexey Proskuryakov]

In Safari 10.1.2 on macOS 10.12.6, the print preview I get is just all black.

[David Alan Hjelle]

To be more clear than the drop-down menus let me be, I can reproduce this in:

Safari Version 11.0 (12604.1.38.1.7) on macOS 10.12.6
Safari Technology Preview Release 40 (Safari 11.1, WebKit 12605.1.6.0.1) on macOS 10.12.6

We originally ran across this on Safari 10, if I recall, but I don't have a copy of that handy to test.

[David Alan Hjelle]

I get a similar-but-different issue on iOS. (iOS 11 on an iPhone X simulator) Then, the output is not cropped, but instead it is shrunk and a footer placed on the bottom of the page. There, too, printing the PDF from a tab of it's own works as I'd expect.

(Please let me know if I should open a separate issue for that.)

[Alexey Proskuryakov]

The black preview happens when I open the link in a background tab by Cmd-clicking it, so it's a separate unrelated issue. I can reproduce the behavior that you describe, testing Safari 11 on High Sierra.