* Check if a string is a complete escape sequence or needs more data
(data: string)
| 27 | * Check if a string is a complete escape sequence or needs more data |
| 28 | */ |
| 29 | function isCompleteSequence(data: string): "complete" | "incomplete" | "not-escape" { |
| 30 | if (!data.startsWith(ESC)) { |
| 31 | return "not-escape"; |
| 32 | } |
| 33 | |
| 34 | if (data.length === 1) { |
| 35 | return "incomplete"; |
| 36 | } |
| 37 | |
| 38 | const afterEsc = data.slice(1); |
| 39 | |
| 40 | // CSI sequences: ESC [ |
| 41 | if (afterEsc.startsWith("[")) { |
| 42 | // Check for old-style mouse sequence: ESC[M + 3 bytes |
| 43 | if (afterEsc.startsWith("[M")) { |
| 44 | // Old-style mouse needs ESC[M + 3 bytes = 6 total |
| 45 | return data.length >= 6 ? "complete" : "incomplete"; |
| 46 | } |
| 47 | return isCompleteCsiSequence(data); |
| 48 | } |
| 49 | |
| 50 | // OSC sequences: ESC ] |
| 51 | if (afterEsc.startsWith("]")) { |
| 52 | return isCompleteOscSequence(data); |
| 53 | } |
| 54 | |
| 55 | // DCS sequences: ESC P ... ESC \ (includes XTVersion responses) |
| 56 | if (afterEsc.startsWith("P")) { |
| 57 | return isCompleteDcsSequence(data); |
| 58 | } |
| 59 | |
| 60 | // APC sequences: ESC _ ... ESC \ (includes Kitty graphics responses) |
| 61 | if (afterEsc.startsWith("_")) { |
| 62 | return isCompleteApcSequence(data); |
| 63 | } |
| 64 | |
| 65 | // SS3 sequences: ESC O |
| 66 | if (afterEsc.startsWith("O")) { |
| 67 | // ESC O followed by a single character |
| 68 | return afterEsc.length >= 2 ? "complete" : "incomplete"; |
| 69 | } |
| 70 | |
| 71 | // Meta key sequences: ESC followed by a single character |
| 72 | if (afterEsc.length === 1) { |
| 73 | return "complete"; |
| 74 | } |
| 75 | |
| 76 | // Unknown escape sequence - treat as complete |
| 77 | return "complete"; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Check if CSI sequence is complete |
no test coverage detected