FA-80068 / Typography line breaking / Member archive

Justified interword spacing: last-line justification · case 03

The final line of a paragraph is stretched across the measure.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Input [word widths, target width, is_last, natural space, min space, max space]. Last lines and single-word lines are set ragged with natural spaces. Otherwise distribute target-sum(words) over the gaps: equal share with the remainder units added to the rightmost gaps; a share below min space is ["overfull"]; if any gap would exceed max space fall back to ragged. Return word x positions.

Why this case matters

Line breaking decides where paragraphs wrap on screen and in print; a wrong decision point shifts every following line.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: last-line justification	`["overfull"]`	`[0, 9, 19, 24, 33]`	Failed

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