| "use strict"; |
| Object.defineProperty(exports, "__esModule", { value: true }); |
| exports.default = default_1; |
| // Iterator that traverses in the range of [min, max], stepping |
| // by distance from a given start position. I.e. for [0, 4], with |
| // start of 2, this will iterate 2, 3, 1, 4, 0. |
| function default_1(start, minLine, maxLine) { |
| let wantForward = true, backwardExhausted = false, forwardExhausted = false, localOffset = 1; |
| return function iterator() { |
| if (wantForward && !forwardExhausted) { |
| if (backwardExhausted) { |
| localOffset++; |
| } |
| else { |
| wantForward = false; |
| } |
| // Check if trying to fit beyond text length, and if not, check it fits |
| // after offset location (or desired location on first iteration) |
| if (start + localOffset <= maxLine) { |
| return start + localOffset; |
| } |
| forwardExhausted = true; |
| } |
| if (!backwardExhausted) { |
| if (!forwardExhausted) { |
| wantForward = true; |
| } |
| // Check if trying to fit before text beginning, and if not, check it fits |
| // before offset location |
| if (minLine <= start - localOffset) { |
| return start - localOffset++; |
| } |
| backwardExhausted = true; |
| return iterator(); |
| } |
| // We tried to fit hunk before text beginning and beyond text length, then |
| // hunk can't fit on the text. Return undefined |
| return undefined; |
| }; |
| } |
