| "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; | |
| }; | |
| } |