FA-80717 / Bidirectional text layout / Member archive

Per-line visual reordering: trailing whitespace per line · case 02

Spaces at the end of wrapped lines jump to the far side.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

Input [paragraph levels, classes, paragraph level, line lengths]. For each logical line: reset trailing WS to the paragraph level, then reorder that line alone by level reversal (lowest odd level of the line). Return per line the paragraph indices in visual order.

Why this case matters

Mixed right-to-left and left-to-right text must resolve levels and visual order exactly, or words, numbers and carets land in the wrong place.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
regression: trailing whitespace per line	`[[0, 1, 2, 3], [8, 4, 5, 6, 7], [9], [10]]`	`[[3, 2, 1, 0], [8, 4, 5, 6, 7], [9], [10]]`	Failed

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

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