FA-80029 / Typography line breaking / Member archive

CJK kinsoku line breaking: minimum line content · case 04

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

Member previewVariant 4 · 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	`["\u3051", "\uff08\u3053", "\u30fc\u3063\u7248", "\u304f\u300d\uff09", "\u3042\uff09\u3046", "\u7d44\uff09\u3051", "\u3042\uff08\u3046"]`	`["\u3051", "\uff08", "\u3053\u30fc\u3063", "\u7248", "\u304f\u300d\uff09", "\u3042\uff09\u3046", "\u7d44\uff09\u3051", "\u3042\uff08\u3046"]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.