Module tabular 

The tabular grid solver: row/column metrics, MultiCell span bookkeeping, and cell content fitting. A faithful port of v0.0.6’s src/backend/tabular.ml (main/determine_row_metrics/ determine_column_width/normalize_tabular/transpose_tabular/ solidify_tabular, cited by name below), adapted two ways:

• Depth sign. tabular.ml threads negative depths (more negative = deeper) through Length.min/Length.negate. This port’s natural_metrics returns a non-negative “how far below the baseline” magnitude (see hbox.rs), so every upstream min/negate pair becomes a plain max/+ here.
• Row/column indexing. normalize_tabular always produces a rectangular grid, so a positional transpose (by column index) replaces upstream’s recursive chop_column/transpose_tabular.

Malformed grids degrade, they don’t panic: where upstream asserts false on a cell that should have been an EmptyCell continuing a pending span (or a span declared with numrow/numcol < 1), this port drops the bogus pending state / clamps to 1 and keeps going.

Structs

Paddings

paddings (horzBox.ml’s paddingL/R/T/B).

Solved

Tabular.main’s result (tabular.ml:309). xs ascends from 0 (column boundaries); ys descends from height (row tops, handlePdf.ml:214-220) down to 0.

TabularBox

The solved PHGFixedTabular payload (horzBox.ml:279), minus rules (filled in lang-side once the rule callback runs, primitives.rs’s prim_tabular).

TabularCellBox

One placed cell inside a solved TabularBox: its box-local anchor (x = left edge, baseline_y = content baseline, both y-up from the box’s own baseline-left origin) and its content already fitted to the cell’s (or, for a span, combined) column width. EmptyCells produce no entry at all.

Enums

Cell

cell (horzBox.ml:447). Content is already-measured pure boxes, so the solver never threads a Context.

Functions

main

Tabular.main (tabular.ml:309): solve the whole grid.