PlanLine.start

ParagraphPlan.lines contains line records in source order. Each nonempty line consumes the half-open unit interval from start through endExclusive. The first line starts at zero, adjacent lines share an endpoint, and the last line ends at the unit count. These are BoxItem and GlueItem indices rather than item array offsets, scalar offsets, or byte offsets.

trimmedEndExclusive removes trailing units whose complete text is an ASCII space or a no-break space. It stays between start and endExclusive. displayTextScalarLength counts Unicode scalars in the consumed text after trailing ASCII spaces and no-break spaces are removed. It excludes the selected penalty insertion and retains leading text.

A unit width includes its following tracking contribution. rawTextWidth is the sum of consumed unit widths minus the last consumed unit trackingAfter. trimmedTextWidth applies the same formula to the trimmed unit interval. An empty trimmed interval has zero width. Reading a plan does not reshape text or modify source measurements.

kind reports the selected penalty kind. selectedPenaltyWidth reports that selected penalty width after conversion to the computation grid for every kind and cost model. The insertion contributes at the selected boundary and leaves the stored text, source indices, and displayTextScalarLength unchanged.

FixedPoint costTextWidth is the raw width, capped at the target minus selectedPenaltyWidth on a nonfinal line with bounded spacing capacity. KnuthPlass costTextWidth excludes leading GlueItem units and excludes trailing GlueItem units for an ordinary break. A Forced KnuthPlass break retains its trailing glue and associated capacity.

FixedPoint postValidationWidthLimit is Some(limit) with the effective target, nonfinal shrink allowance, and one grid unit of rounding allowance. It reports the optimized admission threshold. Single-unit lines and greedy choices can exceed it. KnuthPlass reports None() because its admission is expressed by glue capacity and adjustment ratios.

cost is the selected line contribution under the paragraph cost model, including applicable penalty and transition demerits. adjustmentRatioR is zero for FixedPoint. For KnuthPlass it is the signed ratio to the selected stretch or shrink capacity, scaled by 100000000 and rounded to nearest with ties to even.

ParagraphPlan.totalCost is the sum of its line costs in line order. Scores can be negative when an Allowed penalty rewards a break. A score is interpreted with its CostModel and policies. ParagraphPlan.grid reports the computation grid, while all reported distances retain Length<Pt>.

For an applicable FixedPoint bounded fill search, optimized.boundedFillFeasible is Some(true) when that search succeeds and Some(false) when the second search supplies the plan. In other cases it is None(). The greedy plan always reports None(). This field records feasibility within the configured bounded search.

ParagraphResult.optimized and greedy contain the two plans from the same validated input. breakOpportunityCount counts all eligible penalty entries before planning, including equal-boundary duplicates and the supplied terminal candidate. It is independent of the number of output lines.