Create an Excel-Export for LibLayout

Task Description

Aim of this task is to write a renderer for the Excel-output. The Excel-workbook is generated using the POI library and the LibLayout/CSS3 style properties must be mapped properly into the excel-specific settings. As Excel only has limited number of formats and slots available, styling is more than just a simple mapping.

Requirements

This task depends on the base table-export code.

Solution Approach

As first solution, take a look at the sourcecode of the classic engine and implement the same. POI does not support rich-text cell contents, so we have to transform the cell contents into plain text. For a perfect layout, the rendering step has no 'know' that rich-text is not supported and has to take this into account when computing the layout. The interesting question would be: How do we compute the final style for the cell if multiple text styles can be applied within the same cell?