Created attachment 134210 [details]
In the attached spreadsheet a rectangle covers most of the numbers, but is set to invisible, so it's not shown. It's not shown in Print Preview and when exported to PDF, either. So far so good.
However, it is shown in Print dialog's preview, and also appears during printing, which is bad.
I wanted to check the same with native formats, but I don't see the possibility to show/hide drawing objects in LibreOffice, the transparency of line/fill can be adjusted separately, and that displays fine in Print dialog as well.
Observed using LO 5.4beta2 & 188.8.131.52 / Windows 7.
The difference between the two drawing object XMLs is the extra "hidden" attribute:
<xdr:cNvPr id="2" name="Rectangle 1" hidden="1"/>
Bug is already in 3.3.0.
Build ID: 08f6f9dded1b142b858c455da03319abac691655
CPU Threads: 4; OS Version: Linux 4.8; UI Render: default; VCL: gtk3;
Locale: ca-ES (ca_ES.UTF-8); Calc: group
The situation is more complicated, there are two related elements in OOXML that affect whether the drawing object is there or not:
- attribute "hidden" of element "cNvPr"  that controls whether the drawing object is displayed,
- attribute "fPrintsWithSheet" of element "clientData"  that controls whether the drawing object is printed.
A hidden drawing object is not printed (at least not shown in the preview), but there's no mention of that in the specification.
The relevant properties for binary formats can be found in MS-ODRAW, under 184.108.40.206 Group Shape Boolean Properties (fUsefHidden, fUsefPrint, fHidden, fPrint).
In LibreOffice, as noted in , <drawooo:display> holds this setting, which is not part of the standard, but is similar to ODF's <draw:display>  for layers. As far as I could see there's no option on the UI where it can be set for shapes.
Relevant pieces of the import code:
- OOXML: shape is created here based on the imported data
- OOXML: client data is imported here
- binary format: similar properties are read and passed further
In OOXML's case the question is, where should the two attributes with different origins be processed together?
Created attachment 134369 [details]
Samples with combinations of hidden/not printed settings
The conceptual difference is actually an issue.
Office saves all four combination of hidden / fPrintsWithSheet settings in the file, since the two settings can be turned off/on independently. However, if the shape is hidden, the sheet displays and prints the same regardless of the other setting.
Therefore in LO not only both have to be translated to the same ODF setting ("none"), afterwards it can't be unambiguously converted back to Excel format. In that case "none" should probably be converted back to hidden and printing as the more likely combination (and hidden and not printing would get lost).
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Still exists in 220.127.116.11.
Aron Budea committed a patch related to this issue.
It has been pushed to "master":
tdf#108691, tdf#119639 Don't print hidden objects in XLS(X)
It will be available in 6.2.0.
The patch should be included in the daily builds available at
http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More
information about daily builds can be found at:
Affected users are encouraged to test the fix and report feedback.
The case in the description should now be fixed, for a related issue I've opened bug 119764.
*** Bug 116028 has been marked as a duplicate of this bug. ***