Details
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Bug
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Resolution: Unresolved
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Major
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None
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15.1
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None
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Ubuntu 20.04.5 LTS
xwiki-tomcat9-pgsql
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Unknown
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Description
Background:
I have been experiencing lots of issues with exporting PDFs of pages containing tables, and this has made the PDF export feature almost impossible to use in some cases. After experimenting a little, I have created two example tables in XWiki that I can use to reproduce my issues with the PDF exporter. In both tables, I have a 3-tiered table that has portions of the first two columns grouped using rowspan. The source code for both tables is listed at the bottom of this issue. Table 1 is identical to Table 2 except for the fact that Table 2 has a cell with a long text string in Column 3 that occurs at a PDF page transition.
Expected Behavior:
If I export either table to PDF using the Default Template and without any Export Options enabled:
- Table 1 gives me a 3-page PDF as my output.
- Table 2 gives me a 4-page PDF as my output.
- There are no unexpected changes in the formatting.
- I would expect the output to be basically the same if I was to enable the Header or Footer options during the PDF export.
Actual Behavior:
If I enable the Header or Footer option in the Export Options then I get really bizarre output:
- The Table 1 export generates a 28-page PDF with chunks of the table repeated within the PDF.
- The Table 2 export generates a 5-page PDF, and, as expected, the Column 3 cell containing the long string spills into the next page at the page transition. (At the transition from PDF Page 2 to Page 3.) However, when this happens, the second page seems to lose track of the column count and only displays Column 3 until it reaches the end of the current rowspan. This makes it look like the Column 3 data is actually in Column 1.
- For both tables, the first page of the PDF just displays the first row of the table and the rest of the page is blank.
Attachments:
Attached to this issue are the exported PDFs for both tables. Each table has a PDF exported with and without the Header/Footer options enabled.
Table Source Code:
Table 1:
|=Group|=Subgroup|=Item |(% colspan="1" rowspan="40" %)Group 1|(% colspan="1" rowspan="20" %)Subgroup 1|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="20" %)Subgroup 2|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="40" %)Group 2|(% colspan="1" rowspan="20" %)Subgroup 1|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="20" %)Subgroup 2|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20
Table 2:
|=Group|=Subgroup|=Item |(% colspan="1" rowspan="40" %)Group 1|(% colspan="1" rowspan="20" %)Subgroup 1|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="20" %)Subgroup 2|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. Item 7 is really long. |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="40" %)Group 2|(% colspan="1" rowspan="20" %)Subgroup 1|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20 |(% colspan="1" rowspan="20" %)Subgroup 2|Item 1 |Item 2 |Item 3 |Item 4 |Item 5 |Item 6 |Item 7 |Item 8 |Item 9 |Item 10 |Item 11 |Item 12 |Item 13 |Item 14 |Item 15 |Item 16 |Item 17 |Item 18 |Item 19 |Item 20