Method slice

src/utils/IdSet.js:215–258

* Return slices of ids that exist in this idset. * * @param {number} client * @param {number} clock * @param {number} len * @return {Array }

(client, clock, len)

   * @return {Array<MaybeIdRange>}
   */
  slice (client, clock, len) {
    const dr = this.clients.get(client)
    /**
     * @type {Array<MaybeIdRange>}
     */
    const res = []
    if (dr) {
      /**
       * @type {Array<IdRange>}
       */
      const ranges = dr.getIds()
      let index = findRangeStartInIdRanges(ranges, clock)
      if (index !== null) {
        let prev = null
        while (index < ranges.length) {
          let r = ranges[index]
          if (r.clock < clock) {
            r = new IdRange(clock, r.len - (clock - r.clock))
          }
          if (r.clock + r.len > clock + len) {
            r = new IdRange(r.clock, clock + len - r.clock)
          }
          if (r.len <= 0) break
          const prevEnd = prev != null ? prev.clock + prev.len : clock
          if (prevEnd < r.clock) {
            res.push(createMaybeIdRange(prevEnd, r.clock - prevEnd, false))
          }
          prev = r
          res.push(createMaybeIdRange(r.clock, r.len, true))
          index++
        }
      }
    }
    if (res.length > 0) {
      const last = res[res.length - 1]
      const end = last.clock + last.len
      if (end < clock + len) {
        res.push(createMaybeIdRange(end, clock + len - end, false))
      }
    } else {
      res.push(createMaybeIdRange(clock, len, false))
    }
    return res
  }

  /**
   * @param {number} client