@gmod/bbi/esm/range.js

Parser for BigWig/BigBed files

/**
 * Adapted from a combination of Range and _Compound in the
 * Dalliance Genome Explorer, (c) Thomas Down 2006-2010.
 */
export default class Range {
    constructor(arg1) {
        this.ranges = arg1;
    }
    get min() {
        return this.ranges[0].min;
    }
    get max() {
        return this.ranges.at(-1).max;
    }
    contains(pos) {
        for (const r of this.ranges) {
            if (r.min <= pos && r.max >= pos) {
                return true;
            }
        }
        return false;
    }
    isContiguous() {
        return this.ranges.length > 1;
    }
    getRanges() {
        return this.ranges.map(r => new Range([{ min: r.min, max: r.max }]));
    }
    toString() {
        return this.ranges.map(r => `[${r.min}-${r.max}]`).join(',');
    }
    union(s1) {
        const ranges = [...this.getRanges(), ...s1.getRanges()].sort((a, b) => {
            if (a.min < b.min) {
                return -1;
            }
            else if (a.min > b.min) {
                return 1;
            }
            else if (a.max < b.max) {
                return -1;
            }
            else if (b.max > a.max) {
                return 1;
            }
            else {
                return 0;
            }
        });
        const oranges = [];
        let current = ranges[0];
        for (const nxt of ranges) {
            if (nxt.min > current.max + 1) {
                oranges.push(current);
                current = nxt;
            }
            else if (nxt.max > current.max) {
                current = new Range([{ min: current.min, max: nxt.max }]);
            }
        }
        oranges.push(current);
        return oranges.length === 1 ? oranges[0] : new Range(oranges);
    }
}
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