FA-80030 / Typography line breaking / Member archive

CJK kinsoku line breaking: minimum line content · case 05

Short measures leave two-character lines where one would be legal.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Input [text of full-width characters, line length L]. Lines take L characters. If the next character is a hanging comma/period (、。，．) and is not itself followed by a line-start-prohibited character, it hangs on the line (burasage). Otherwise move characters to the next line while the next line would start with a prohibited character (、。，．）」』！？ー and small kana), then while the line would end with an opening bracket; a line keeps at least one character. Return the lines.

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: minimum line content	`["\u6587\u3083\u30fc\u8a9e", "\u3042\u3002\u304b\u3053", "\u672c\u304b\u3001\u5b57\u3001", "\u5b57\u300c\u3083", "\u304a\u3083", "\u300f\u300d\u3001\u3063"]`	`["\u6587\u3083\u30fc\u8a9e", "\u3042\u3002\u304b\u3053", "\u672c\u304b\u3001\u5b57\u3001", "\u5b57\u300c\u3083", "\u304a", "\u3083", "\u300f\u300d\u3001\u3063"]`	Failed

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