taxonium-component/dist/GCContentAdapter-DOFq-pcw.js

React component for exploring large phylogenetic trees in the browser

import { B as E } from "./index-BnQfM3Nw.js";
import { a2 as v, a3 as F, u as m, R as N } from "./JBrowsePanel-uJIA-L6s.js";
import { r as b } from "./rxjs-BnZkaVAs.js";
class z extends E.BaseFeatureDataAdapter {
  constructor() {
    super(...arguments), this.gcMode = "content";
  }
  async configure() {
    var t;
    const s = await ((t = this.getSubAdapter) === null || t === void 0 ? void 0 : t.call(this, this.getConf("sequenceAdapter")));
    if (!s)
      throw new Error("Error getting subadapter");
    return s.dataAdapter;
  }
  async getRefNames(t) {
    return (await this.configure()).getRefNames(t);
  }
  getFeatures(t, s) {
    const { statusCallback: C = () => {
    }, stopToken: x } = s || {};
    return b.ObservableCreate(async (c) => {
      var l;
      const S = await this.configure(), a = this.getConf("windowSize"), g = this.getConf("windowDelta"), o = a === 1 ? 1 : Math.ceil(a / 2), A = a === 1, d = Math.max(0, Math.floor((t.start - o) / a) * a), p = Math.ceil((t.end + o) / a) * a;
      if (p < 0 || d > p) {
        c.complete();
        return;
      }
      const f = ((l = (await v(S.getFeatures({
        ...t,
        start: d,
        end: p
      }, s).pipe(F())))[0]) === null || l === void 0 ? void 0 : l.get("seq")) || "";
      let w = performance.now();
      await m.updateStatus("Calculating GC", C, () => {
        for (let e = o; e < f.length - o; e += g) {
          performance.now() - w > 400 && (N.checkStopToken(x), w = performance.now());
          const M = A ? f[e] : f.slice(e - o, e + o);
          let r = 0, i = 0, h = 0;
          for (const n of M)
            n === "c" || n === "C" ? r++ : (n === "g" || n === "G") && i++, n !== "N" && h++;
          const u = d, k = this.gcMode === "content" ? (i + r) / (h || 1) : this.gcMode === "skew" ? (i - r) / (i + r || 1) : 0;
          c.next(new m.SimpleFeature({
            uniqueId: `${this.id}_${u + e}`,
            refName: t.refName,
            start: u + e,
            end: u + e + g,
            score: k
          }));
        }
      }), c.complete();
    });
  }
}
z.capabilities = ["hasLocalStats"];
export {
  z as default
};
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