term

text_size_chunks(text, opts) -> chunks, meta_str

Calculate text-sizing chunk boundaries without generating escape sequences

Helper used by tss:apply_sized(). Accepts the same opts table as text_size(). Three return cases:

• Chunking needed (n, d, and w all set): a table of {start, stop, meta_str} chunk descriptors (1-based UTF-8 character indices) plus the meta_str string.
• Single wrap (no fractional chunking): nil, meta_str.
• No text sizing applicable: nil, nil.