1404745 - Background colour of html table cells is unaligned in every printed-previewed page after the first

Status: NEW

(Core :: Printing: Output, defect, P3)

Description

[John & Nick]

Attachment: ffx-wtf.htm

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0
Build ID: 20170928210252

Steps to reproduce:

Open a specially crafted test-page


Actual results:

The coloured cells look ridiculous when a multi-page table with coloured cells is printed or previewed. The background colour overflows past the cell's right and bottom borders and is thus not aligned to the cell's borders. Because of this overflow, a part of the coloured cell has either no colour at all, or has the wrong colour if the nearby cells have a different colour (the test page has an example of this on the first column). 

Since this is not easily explained/understood, we provide a simplified test page and a pdf export from firefox 52.4.0esr. This is a very old bug (pre 49.x) and also occurs on 55.0, 56.0, 57.0b4 too. Who knows when it was introduced, it might be there from pre 38.x releases.

If every cell was coloured, or there was a chess pattern on all cells, things would get really ugly...

Our first thought was that the printer was to blame but after a preview on firefox we realized that the poor printer was printing unaligned colours because it was being fed with unaligned content.
We hope it gets fixed soon.


Expected results:

The background colour should not overflow the cell's borders under any circumstances

Comment 1

[John & Nick]

Attachment: Print of the test page to pdf