| 407 | } |
| 408 | |
| 409 | fn wrap_hard_display_width(s: &str, max_width: usize) -> Vec<String> { |
| 410 | if max_width == 0 { |
| 411 | return vec![String::new()]; |
| 412 | } |
| 413 | if UnicodeWidthStr::width(s) <= max_width { |
| 414 | return vec![s.to_string()]; |
| 415 | } |
| 416 | |
| 417 | let mut lines: Vec<String> = Vec::new(); |
| 418 | let mut current = String::new(); |
| 419 | let mut current_width = 0usize; |
| 420 | |
| 421 | for ch in s.chars() { |
| 422 | let ch_width = UnicodeWidthChar::width(ch).unwrap_or(0); |
| 423 | |
| 424 | if !current.is_empty() && current_width + ch_width > max_width { |
| 425 | lines.push(std::mem::take(&mut current)); |
| 426 | current_width = 0; |
| 427 | } |
| 428 | |
| 429 | // Even if a single char is wider than max_width, still render it. |
| 430 | current.push(ch); |
| 431 | current_width += ch_width; |
| 432 | |
| 433 | if current_width >= max_width && !current.is_empty() { |
| 434 | lines.push(std::mem::take(&mut current)); |
| 435 | current_width = 0; |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | if !current.is_empty() { |
| 440 | lines.push(current); |
| 441 | } |
| 442 | |
| 443 | if lines.is_empty() { |
| 444 | lines.push(String::new()); |
| 445 | } |
| 446 | |
| 447 | lines |
| 448 | } |
| 449 | |
| 450 | // Top margin between messages (previously provided partly by role/timestamp line). |
| 451 | items.push(blank_line()); |