How to avoid top margin of an element on new pages in AntennaHouse?

Question

I'm doing print layouts with HTML and CSS with AntennaHouse renderer.

A box in my content should have a top margin of 20pt. Easy:

margin-top: 20pt;

But the top margin should only be applied when the element doesn't stand at the beginning of a new page (when no page break is exactly before the element).

Does anyone have an idea how to do that?

XSL-FO solutions are welcome as well, as AntennaHouse has equivalent functions for FO and CSS rendering...

Answer 1

Antenna House provides also some XSL / CSS extensions (additional properties or values). If you look at this documentation, http://www.antennahouse.com/product/ahf60/docs/ahf-ext.html#IDASJ5GB, you will find the -ah-margin-break properties that may answer your requirements.

Please note this is an non-standard feature (regarding XSL-FO and CSS specifications), available only in Antenna House Formatter.

Answer 2

Try -ah-margin-break (see https://www.antenna.co.jp/AHF/help/en/ahf-ext.html#axf.margin-break).

-ah-margin-break: discard will discard "the margin on the before side of the block placed at the start of the document or right after the forced page/column break." I am not sure whether 'forced' covers a column/page break that was caused because the previous column/page was full.