45 lines
1.6 KiB
JavaScript
45 lines
1.6 KiB
JavaScript
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/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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export var Range;
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(function (Range) {
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/**
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* Returns the intersection between two ranges as a range itself.
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* Returns `{ start: 0, end: 0 }` if the intersection is empty.
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*/
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function intersect(one, other) {
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if (one.start >= other.end || other.start >= one.end) {
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return { start: 0, end: 0 };
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}
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var start = Math.max(one.start, other.start);
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var end = Math.min(one.end, other.end);
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if (end - start <= 0) {
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return { start: 0, end: 0 };
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}
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return { start: start, end: end };
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}
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Range.intersect = intersect;
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function isEmpty(range) {
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return range.end - range.start <= 0;
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}
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Range.isEmpty = isEmpty;
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function intersects(one, other) {
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return !isEmpty(intersect(one, other));
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}
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Range.intersects = intersects;
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function relativeComplement(one, other) {
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var result = [];
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var first = { start: one.start, end: Math.min(other.start, one.end) };
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var second = { start: Math.max(other.end, one.start), end: one.end };
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if (!isEmpty(first)) {
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result.push(first);
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}
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if (!isEmpty(second)) {
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result.push(second);
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}
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return result;
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}
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Range.relativeComplement = relativeComplement;
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})(Range || (Range = {}));
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