distance-iterator.js

/*istanbul ignore start*/
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = _default;

/*istanbul ignore end*/
// 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
/*istanbul ignore start*/
_default
/*istanbul ignore end*/
(start, minLine, maxLine) {
  var 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 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 -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

  };
}
//# sourceMappingURL=data:application/json;charset=utf-8;base64,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