Hamza 2c6a2ad082 Rulers: an inch is divided in half, not in ten ...

Zooming in on an inch ruler stepped through 0.2, 0.1 and 0.05 of an inch:
`Unit::ruler_step` picked from one decimal ladder for every unit, and the
rulers divided whatever it returned by ten. A tenth of an inch is not a mark an
inch ruler carries (#2827).

Below an inch the steps are binary fractions now, 1/2 down to 1/128, and
`Unit::ruler_minor` gives the unlabelled ticks between two labels: an eighth of
the step on an inch ruler, so every tick is a binary fraction of an inch and
they stay about as dense as the tenths elsewhere. An inch and wider keeps the
shared ladder, and the metric units, points, pixels and picas keep their
tenths. Ruler-tick snapping follows the ticks that are drawn, which moves an
inch document's Shift-drag of a guide onto the same grid.

`ruler_label` took its decimals from `(-step.log10()).ceil()`, which writes
1/16 as "0.06" and 1/8 as "0.13" -- wrong values, not just rounded ones. It
uses the fewest decimals that write the step exactly, and drops trailing zeros
as `Unit::number` does, so a sixteenth-inch ruler labels the inch `1` rather
than spelling `1.0000` down six lines of the vertical ruler.

2026-10-19 23:47:03 +07:00

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Rulers: an inch is divided in half, not in ten

2026-10-19 23:47:03 +07:00

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2026-10-18 01:21:30 +07:00