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