Fix how xlsx-renderer handle vertical merged cells inside loops

[Siemienik]

Fix how xlsx-renderer handle vertical merged cells inside loops

[skypesky]

@Siemienik
I ran the branch test and have seen the error. f/37-vertical-merged-cells.
The implementation of this part seems to be the most complex(ForeachCell). I plan to spend some time studying it.

[Siemienik]

Vertically merged cells in loop do not work perfectly as can be seen in 9a87732.

[skypesky]

@Siemienik
This question looks interesting,
Is there any code that repeats this bug?

[Siemienik]

Hi @skypesky. I'm glad that you're asking.

Yes, the reproduction could be found in this commit: Siemienik/xlsx-renderer@9a87732

You can run these test fixtures with the current codebase by putting them into the integration tests: https://github.com/Siemienik/XToolset/tree/master/packages/xlsx-renderer/tests/integration/data

[Siemienik]

I'll keep my fingers crossed. if any help is needed you can find me as always on the Gitter

[thanh-withcoverage]

Hi @Siemienik any updates on this topic? I'm facing ugly/unstable render for vertical merged cell. I would like to achieve something like in the image.

My template: