List<String> (@NotNull String input, @Nullable CaretStateTransferableData caretData, int caretCount) { if (caretCount <= 0) { throw new IllegalArgumentException("Caret count must be positive"); } if (caretCount == 1) { return Collections.singletonList(input); } // // | caretData | input split by | split count | Nth caret content | // |:----------|:-----------------:|:-----------:|:------------------| // | null | \n | 1 | split[0] | // | null | \n | != 1 | split[N] | // | !null | caretData.offsets | 1 | split[0] | // | !null | caretData.offsets | != 1 | split[N] | // List<String> result = new ArrayList<>(caretCount); if (caretData == null) { String[] lines = input.split("\n", -1); // need to ignore the trailing \n in input for purpose of having a 1 sourceCaret, and makes no difference for non 1 sourceCaret count int sourceCaretCount = lines.length == 2 && lines[1].isEmpty() ? 1 : lines.length; for (int i = 0; i < caretCount; i++) { if (sourceCaretCount == 1) { result.add(lines[0]); } else { result.add(i < lines.length ? lines[i] : ""); } } } else { int sourceCaretCount = caretData.startOffsets.length; for (int i = 0; i < caretCount; i++) { if (sourceCaretCount == 1) { result.add(input); } else { result.add(i < sourceCaretCount ? input.substring(caretData.startOffsets[i], caretData.endOffsets[i]) : ""); } } } return result; }