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adapt_table(table):
  if table.has_column_schema:
    grid = [table.column_names] + render_typed_records(table)
    regions = [whole_table_region(grid)]
    header_is_declared = true
  else:
    grid = expand_merged_cells(table.visible_cells)
    regions = detect_regions_from_occupied_cells(grid)
    header_is_declared = false

  headers = build_header_paths(grid, regions)
  return grid, headers, header_is_declared

pack_rows(grid, headers, header_is_declared):
  rows = grid.data_rows if header_is_declared else grid.all_rows
  return pack_until_content_budget(rows, headers)

电子表格的启发式表头保留在数据中，以避免误判漏内容；智能表格的显式表头可以安全摘除。有效行与派生列过滤属于前置适配规则。

for region in detected_regions:
  last_row = region.end_row - window_height + 1
  last_col = region.end_col - window_width + 1
  windows_by_start = {}
  for row in range(region.start_row, last_row + 1, stride_row):
    for col in range(region.start_col, last_col + 1, stride_col):
      cells = rectangle(row, col, window_height, window_width)
      if quota_exhausted():
        stop_region_generation()
      if cells_are_empty(cells):
        continue
      record = emit_window(cells, original_rectangle_anchor)
      windows_by_start[(row, col)] = record

  for start, record in windows_by_start:
    record.adjacent_windows = existing_neighbors_at(
      start + eight_direction_offsets(stride_row, stride_col)
    )

此处省略单窗口 head + tail 采样及格式化。空间邻接引用生成窗口的标识；序列 prev / next 属于另一条关系。配额耗尽时生成过程会停止，而不是靠末端的 continue 无限遍历。

output = []
max_chunks = 350

for kind, quota in [
    (OVERVIEW, 3), (SUMMARY, 18),
    (COLUMN, 35), (WINDOW, 35), (ROW, REMAINING)]:
  remaining = max_chunks - len(output)
  if remaining == 0:
    break

  limit = remaining if quota == REMAINING else min(quota, remaining)
  records = generate(kind, contexts, limit)
  for record in records:
    fragments = encode_for_storage(record)
    output.extend(fragments[:max_chunks - len(output)])

row_pass(regions, budget):
  small_regions = [r for r in regions if r.row_count <= 50]
  large_regions = [r for r in regions if r.row_count > 50]
  small = take_within_budget(pack_all_rows(small_regions), budget)
  budget -= count(small)  # 扣打包记录数，不扣原始行数
  if budget == 0:
    return small
  quotas = allocate_by_weight(large_regions.row_counts, budget)
  large = pack_then_stride_sample(large_regions, quotas)
  return small + large

REMAINING 表示剩余额度。此处强调逻辑记录与落地分片分别计数；真正的生成器还需处理 region 权重、空内容、单片长度与负值“不限”等条件。