FA-37099 / Table interactions / Member archive

Table rectangular selection projection: reverse column drag · case 04

The table reverse column drag result violates the stipulated table rectangular selection projection contract.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

A rectangular cell selection is inclusive on both axes and independent of drag direction; hidden rows and columns are omitted, locked cells remain selected but are not editable, and outline edges follow visible surviving cells.

Why this case matters

An offline table UI model isolates table rectangular selection projection, including adversarial row/column relationships.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
reverse rectangle	`{"bottom": [], "cells": [], "cols": [], "editable": [], "left": [], "right": [], "rows": ["a", "b", "c"], "top": []}`	`{"bottom": [["c", "x"], ["c", "y"], ["c", "z"]], "cells": [["a", "x"], ["a", "y"], ["a", "z"], ["b", "x"], ["b", "y"], ["b", "z"], ["c", "x"], ["c", "y"], ["c", "z"]], "cols": ["x", "y", "z"], "editable": [["a", "x"], ["a", "y"], ["a", "z"], ["b", "x"], ["b", "y"], ["b", "z"], ["c", "x"], ["c", "y"], ["c", "z"]], "left": [["a", "x"], ["b", "x"], ["c", "x"]], "right": [["a", "z"], ["b", "z"], ["c", "z"]], "rows": ["a", "b", "c"], "top": [["a", "x"], ["a", "y"], ["a", "z"]]}`	Failed

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