Module: Oselvar::Var::Core::TableCells

Defined in:
lib/oselvar/var/core/table_cells.rb

Overview

Parse a Markdown/Gherkin table row into trimmed cells and per-cell source spans. Port of table-cells.ts. All offsets count UTF-16 code units.

Class Method Summary collapse

Class Method Details

.parse_row_cells(line_text, line_start_offset, source) ⇒ Object

Split a | a | b | row into [cells, cell_spans]. line_start_offset is the UTF-16 offset of the row's first character within source.



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# File 'lib/oselvar/var/core/table_cells.rb', line 15

def parse_row_cells(line_text, line_start_offset, source)
  first_cp = line_text.index('|')
  last_cp = line_text.rindex('|')
  return [[], []] if first_cp.nil? || last_cp.nil? || last_cp <= first_cp

  # Pipe positions: convert code-point index to UTF-16 (matters when
  # astral chars precede the pipe). '|' is ASCII → 1 UTF-16 unit.
  first_u16 = Offsets.to_utf16_offset(line_text, first_cp)
  inner_start_u16 = first_u16 + 1

  inner = line_text[(first_cp + 1)...last_cp]

  cells = []
  cell_spans = []
  cursor = 0 # running UTF-16 position within inner

  # split(-1) keeps trailing empty segments, matching JS/Python split.
  inner.split('|', -1).each do |seg|
    trimmed = seg.strip
    leading = Offsets.utf16_len(seg) - Offsets.utf16_len(seg.lstrip)
    abs_start = line_start_offset + inner_start_u16 + cursor + leading
    cells << trimmed
    cell_spans << Offsets.span_from_offsets(source, abs_start, abs_start + Offsets.utf16_len(trimmed))
    cursor += Offsets.utf16_len(seg) + 1 # +1 for the '|' delimiter
  end

  [cells, cell_spans]
end