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designcraft/crates/compose
Aykut FiratandClaude Opus 5.5 08ce444054 Tables: cell First Baseline offset (Cell Options › Text › First Baseline)
Cells and cell styles had no first-baseline setting, so every cell set its first line by the
Ascent offset (the font's typographic ascender). IDML documents that set FirstBaselineOffset on a
cell style (CapHeight is common, often through a table style's body region) composed every row
taller than the document asked for. With a font whose typographic ascender is a full em (Avenir),
each row grew about 2.6 pt and long tables overset, losing their last rows.

- doc: Cell.first_baseline / first_baseline_min; CellStyle.first_baseline / first_baseline_min,
  applied by CellStyle::apply_to and carried through resolve_cell_style's BasedOn chain.
- idml: FirstBaselineOffset and MinimumFirstBaselineOffset read and written on cells and cell styles.
- compose: a cell's text frame uses the cell's first baseline offset and minimum.
- engine: table.setCell, style.cell.create/edit take firstBaseline / firstBaselineMin; table.get
  reports them; style.cell.create fromSelection captures them.
- tests: import through BasedOn and a table style's body region, a cell's own override, IDML round
  trip; composer cap height vs ascent and a fixed minimum; command parameters and validation.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-17 15:07:46 -04:00
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2026-10-16 04:00:23 +00:00