Multi-column pages with column rules
As an example for multi-column pages, a two-column page with column rules is generated.
In this example a page with two neighbouring columns is generated. These columns are separated by a hyphen. Lines of separation for columns are a proprietary extension of Antenna House, so they are not part of XSL-FO. For the adjustment of the columns at the end in order to get columns with the same height, a block is set at the end which is spanned over both columns.
<fo:simple-page-master margin="15mm 20mm 30mm 20mm" master-name="Index" page-height="297mm" page-width="210mm"> <fo:region-body margin="5mm 0mm 7mm 0mm" column-count="2" ❶ column-gap="4mm" axf:column-rule-style="solid" axf:column-rule-width="1pt"/> </fo:simple-page-master> ... <fo:block span="all" color="#FFFFFF" border-after-style="solid" ❷ border-after-width="1pt"> <xsl:text/> </fo:block> ...
❶ The multi-column layout of a page has to be specified in the <fo:region-body> element within the relevant page template (column-count), here on 2. The column-gap attribute defines the gap between the columns. With the two XSL-FO extensions of Antenna House, axf:column-rule-style and axf:column-rule-width, the style and the width of the column rule are determined. Further attributes in this context are axf:column-rule-color (colour of the column rule), axf:column-rule-length (length of the column rule, if it has not the same height as the column) as well as axf:column-rule-align (alignment of the column rule). The namespace axf: has to be specified with the xmlns attribute in the <xsl:stylesheet> element. It goes without saying that other XSL formatters do not support column rules in this form.
❷ In XSL-FO there is no concept for the adjustment of columns. In practise this can be achieved by inserting an invisible block to the desired position in the stylesheet. span is set with the value all. Further attributes ensure that the block does not require additional room and remains invisible.
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