@indielayer/ui/lib/virtual/core/createCachedBounds.js

Indielayer UI Components with Tailwind CSS build for Vue 3

import { assert as f } from "../utils/assert.js";
function d({
  itemCount: u,
  itemProps: a,
  itemSize: r
}) {
  const e = /* @__PURE__ */ new Map();
  return {
    get(s) {
      for (f(s < u, `Invalid index ${s}`); e.size - 1 < s; ) {
        const t = e.size;
        let c;
        switch (typeof r) {
          case "function": {
            c = r(t, a);
            break;
          }
          case "number": {
            c = r;
            break;
          }
        }
        if (t === 0)
          e.set(t, {
            size: c,
            scrollOffset: 0
          });
        else {
          const n = e.get(t - 1);
          f(
            n !== void 0,
            `Unexpected bounds cache miss for index ${s}`
          ), e.set(t, {
            scrollOffset: n.scrollOffset + n.size,
            size: c
          });
        }
      }
      const o = e.get(s);
      return f(
        o !== void 0,
        `Unexpected bounds cache miss for index ${s}`
      ), o;
    },
    set(s, o) {
      e.set(s, o);
    },
    get size() {
      return e.size;
    }
  };
}
export {
  d as createCachedBounds
};