Line Geometry. drop Cap Span: int- Модуль
- std.
typeset → - Получатель
- Line
Geometry - Минимальное число аргументов
- 0
- Максимальное число аргументов
- 0
Declaration and parameters
СсылкаДоступность
Включено по умолчанию · Не определено
Import std.typeset in language mode 5.21.
The current compiler selects std/typeset.tpz for this language mode. Availability in other released editions and inclusion in each installed distribution are Pending.
Получатель
LineGeometry
Ограничения параметров
LineGeometry.bodyTarget and firstTarget are positive Length<Pt> distances that remain positive after conversion to the selected grid. The line beginning at unit zero uses firstTarget. Each later line uses bodyTarget.
dropCapSpan is an integer from zero through three. dropCapInset is a nonnegative Length<Pt>. When both are positive, subtract the inset from the first dropCapSpan line targets. A zero span or zero inset leaves the base targets unchanged.
An active inset must be smaller than both firstTarget and bodyTarget after quantization. A nonpositive base target, span outside zero through three, negative inset, or inset that consumes a target returns TypesetError.InvalidPolicy before item validation.
PlanLine.target reports the resulting physical target after the first line choice, quantization, and any inset. Geometry selects the available width and does not alter source unit indices or measured text widths.
Связанное правило · Compute each line target from one geometry →Результат
The declared result type is int.
Эффекты
Ошибки
Result and effects
СсылкаSelect this field from a value of its named type without call parentheses.
Use an int from zero through three. Zero disables the inset. Positive values apply dropCapInset to that many output lines when the inset is positive.
Why
СсылкаOne geometry record describes first line indentation and the finite span of a drop cap. Checking effective targets before searching prevents different search paths from assigning different meanings to unusable widths.
Resolved contracts
СсылкаRelated entries
СсылкаCompute each line target from one geometry
СсылкаCompute each line target from one geometry
LineGeometry.bodyTarget and firstTarget are positive Length<Pt> distances that remain positive after conversion to the selected grid. The line beginning at unit zero uses firstTarget. Each later line uses bodyTarget.
dropCapSpan is an integer from zero through three. dropCapInset is a nonnegative Length<Pt>. When both are positive, subtract the inset from the first dropCapSpan line targets. A zero span or zero inset leaves the base targets unchanged.
An active inset must be smaller than both firstTarget and bodyTarget after quantization. A nonpositive base target, span outside zero through three, negative inset, or inset that consumes a target returns TypesetError.InvalidPolicy before item validation.
PlanLine.target reports the resulting physical target after the first line choice, quantization, and any inset. Geometry selects the available width and does not alter source unit indices or measured text widths.
Причина
One geometry record describes first line indentation and the finite span of a drop cap. Checking effective targets before searching prevents different search paths from assigning different meanings to unusable widths.
Apply the first target and drop cap inset in line order
Ссылкаimport std.typeset as tsimport std.iolet items: Array<ts.Item> = [ts.Item.BoxItem(ts.Box { unitIndex: 0, text: "a", width: 3pt, trackingAfter: 0pt }),ts.Item.PenaltyItem(ts.Penalty { unitEnd: 1, width: 0pt, rule: ts.BreakRule.Forced(), kind: ts.BreakKind.ForcedEnd(), flagged: false }),ts.Item.BoxItem(ts.Box { unitIndex: 1, text: "a", width: 3pt, trackingAfter: 0pt }),ts.Item.PenaltyItem(ts.Penalty { unitEnd: 2, width: 0pt, rule: ts.BreakRule.Forced(), kind: ts.BreakKind.ForcedEnd(), flagged: false })]let input = ts.Paragraph {grid: ts.DistanceGrid.MilliPoint(),items: items,geometry: ts.LineGeometry { bodyTarget: 10pt, firstTarget: 8pt, dropCapSpan: 1, dropCapInset: 2pt },justification: ts.JustificationPolicy {mode: ts.JustificationMode.Unjustified(), minGapCount: 0,minLineWidthRatioM: 0, minFinalLineWidthRatioM: None(),maxAdjustment: 0pt, maxGapAdjustment: 0pt, maxGapRatioR: 0,latinSpacing: None(), cjkStretchRatio: 0.0},costModel: ts.CostModel.FixedPoint(),knuthPlass: ts.KnuthPlassPolicy { toleranceR: 100000000, linePenalty: 10, fitnessDemerit: 0, flaggedDemerit: 0, finalFlaggedDemerit: 0 }}match (ts.breakParagraph(input)) {case Ok(result) => {let first = result.optimized.lines[0]let second = result.optimized.lines[1]io.writeLine("{first.target == 6pt} {second.target == 10pt}")}case Err(_) => io.writeLine("unexpected error")}
true true
Ожидаемый результат
Ожидаемый результат
Выполнение завершается. Код завершения 0.
true true
Reject a zero line target before planning
Ссылкаimport std.typeset as tsimport std.iolet items: Array<ts.Item> = [ts.Item.BoxItem(ts.Box { unitIndex: 0, text: "a", width: 1pt, trackingAfter: 0pt }),ts.Item.PenaltyItem(ts.Penalty { unitEnd: 1, width: 0pt, rule: ts.BreakRule.Forced(), kind: ts.BreakKind.ForcedEnd(), flagged: false })]let input = ts.Paragraph {grid: ts.DistanceGrid.MilliPoint(),items: items,geometry: ts.LineGeometry { bodyTarget: 0pt, firstTarget: 0pt, dropCapSpan: 0, dropCapInset: 0pt },justification: ts.JustificationPolicy {mode: ts.JustificationMode.Unjustified(), minGapCount: 0,minLineWidthRatioM: 0, minFinalLineWidthRatioM: None(),maxAdjustment: 0pt, maxGapAdjustment: 0pt, maxGapRatioR: 0,latinSpacing: None(), cjkStretchRatio: 0.0},costModel: ts.CostModel.FixedPoint(),knuthPlass: ts.KnuthPlassPolicy { toleranceR: 100000000, linePenalty: 10, fitnessDemerit: 0, flaggedDemerit: 0, finalFlaggedDemerit: 0 }}match (ts.breakParagraph(input)) {case Err(InvalidPolicy(_)) => io.writeLine("InvalidPolicy")case _ => io.writeLine("unexpected result")}
InvalidPolicy
Ожидаемый результат
Ожидаемый результат
Выполнение завершается. Код завершения 0.
InvalidPolicy
Reject a negative drop cap inset
Ссылкаimport std.typeset as tsimport std.iolet items: Array<ts.Item> = [ts.Item.BoxItem(ts.Box { unitIndex: 0, text: "a", width: 1pt, trackingAfter: 0pt }),ts.Item.PenaltyItem(ts.Penalty { unitEnd: 1, width: 0pt, rule: ts.BreakRule.Forced(), kind: ts.BreakKind.ForcedEnd(), flagged: false })]let input = ts.Paragraph {grid: ts.DistanceGrid.MilliPoint(),items: items,geometry: ts.LineGeometry { bodyTarget: 10pt, firstTarget: 10pt, dropCapSpan: 1, dropCapInset: -1pt },justification: ts.JustificationPolicy {mode: ts.JustificationMode.Unjustified(), minGapCount: 0,minLineWidthRatioM: 0, minFinalLineWidthRatioM: None(),maxAdjustment: 0pt, maxGapAdjustment: 0pt, maxGapRatioR: 0,latinSpacing: None(), cjkStretchRatio: 0.0},costModel: ts.CostModel.FixedPoint(),knuthPlass: ts.KnuthPlassPolicy { toleranceR: 100000000, linePenalty: 10, fitnessDemerit: 0, flaggedDemerit: 0, finalFlaggedDemerit: 0 }}match (ts.breakParagraph(input)) {case Err(InvalidPolicy(_)) => io.writeLine("InvalidPolicy")case _ => io.writeLine("unexpected result")}
InvalidPolicy
Ожидаемый результат
Ожидаемый результат
Выполнение завершается. Код завершения 0.
InvalidPolicy