Add reading_flow: column-aware reading order via XY-cut#386
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element_parse.reading_order is a flat top-to-bottom sort that interleaves columns on multi-column pages (A1, B1, A2, B2). Recover the correct order with recursive XY-cut: split at the widest whitespace valley (vertical -> columns, horizontal -> rows), so a two-column page reads A1, A2, B1, B2. flow_order returns the same index-tagged contract as reading_order (a drop-in column-aware upgrade, named to not shadow it).
Up to standards ✅🟢 Issues
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| Metric | Results |
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| Complexity | 53 |
| Duplication | 0 |
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摘要
新增
flow_order/xy_cut/to_blocks— 以遞迴 XY-cut 還原多欄版面的正確閱讀順序。element_parse.reading_order是平面上到下 / 左到右排序,在多欄頁面會交錯欄位(讀 A 欄第 1 列、B 欄第 1 列、A 欄第 2 列…)。本功能在最寬留白谷反覆切分(垂直 gutter → 欄、水平 gutter → 列 / 區塊),因此兩欄版面完整讀完 A 欄再讀 B 欄。公開展平函式命名為
flow_order以並列而非遮蔽element_parse.reading_order,並回傳相同的index標記契約(欄位感知的直接升級)。純標準函式庫幾何;重用table_grid_fill的框邊界讀取器。Qt-free。五層
utils/reading_flow/—xy_cut、flow_order、to_blocks。AC_flow_order+AC_xy_cut/ MCPac_flow_order+ac_xy_cut/ Script Builder(OCR)。測試
test_reading_flow_batch.py— 兩欄欄位感知順序 A1,A2,B1,B2、頂層 X 切分、單欄上到下、to_blocks 葉數、index 指派、空輸入、wiring + facade。8 passed。ruff / bandit / radon / float-scan / Qt-free 全乾淨。