discord-decomp/_bundle/ListMetricsAggregator.js

// Metro module 315 (f316).
import _classCallCheck from "./_classCallCheck";
import _createClass from "./_createClass";
import Module38 from "./Module38";
import * as _elementsThatOverlapOffsets from "./elementsThatOverlapOffsets";
let env326 = {};
const ListMetricsAggregator = function ListMetricsAggregator() {
  _classCallCheck(this, ListMetricsAggregator);
  this._averageCellLength = 0;
  this._cellMetrics = new Map();
  this._highestMeasuredCellIndex = 0;
  this._measuredCellsLength = 0;
  this._measuredCellsCount = 0;
  this._orientation = {
    horizontal: false,
    rtl: false
  };
};
export default _createClass(ListMetricsAggregator, [{
  key: "notifyCellLayout",
  value: function notifyCellLayout({ cellIndex, cellKey, orientation, layout }) {
    this._invalidateIfOrientationChanged(orientation);
    const r6 = {
      index: cellIndex,
      length: this._selectLength(layout),
      isMounted: true,
      offset: this.flowRelativeOffset(layout)
    };
    const r17 = this._cellMetrics.get(cellKey);
    if (r17 && r6.offset === r17.offset && r6.length === r17.length) {
      r17.isMounted = true;
      return false;
    }
    if (r17) {
      this._measuredCellsLength = this._measuredCellsLength + (r6.length - r17.length);
    } else {
      this._measuredCellsLength = this._measuredCellsLength + r6.length;
      this._measuredCellsCount = this._measuredCellsCount + 1;
    }
    this._averageCellLength = this._measuredCellsLength / this._measuredCellsCount;
    this._cellMetrics.set(cellKey, r6);
    this._highestMeasuredCellIndex = Math.max(this._highestMeasuredCellIndex, cellIndex);
    return true;
  }
}, {
  key: "notifyCellUnmounted",
  value: function notifyCellUnmounted(a0) {
    const r5 = this._cellMetrics.get(a0);
    if (r5) {
      r5.isMounted = false;
    }
  }
}, {
  key: "notifyListContentLayout",
  value: function notifyListContentLayout({ orientation, layout }) {
    this._invalidateIfOrientationChanged(orientation);
    this._contentLength = this._selectLength(layout);
  }
}, {
  key: "getAverageCellLength",
  value: function getAverageCellLength() {
    return this._averageCellLength;
  }
}, {
  key: "getHighestMeasuredCellIndex",
  value: function getHighestMeasuredCellIndex() {
    return this._highestMeasuredCellIndex;
  }
}, {
  key: "getCellMetricsApprox",
  value: function getCellMetricsApprox(a0, a1) {
    const cellMetrics = this.getCellMetrics(a0, a1);
    if (cellMetrics && cellMetrics.index === a0) {
      return cellMetrics;
    }
    const highestMeasuredCellIndex = this.getHighestMeasuredCellIndex();
    const r1 = highestMeasuredCellIndex < a0;
    let offset = void 0;
    if (r1) {
      const cellMetrics2 = this.getCellMetrics(highestMeasuredCellIndex, a1);
      offset = cellMetrics2 ? cellMetrics2.offset + cellMetrics2.length + this._averageCellLength * (a0 - highestMeasuredCellIndex - 1) : void 0;
    }
    if (offset == null) {
      offset = this._averageCellLength * a0;
    }
    const { data, getItemCount } = a1;
    Module38(a0 >= 0 && a0 < getItemCount(data), "Tried to get frame for out of range index " + a0);
    return {
      length: this._averageCellLength,
      offset,
      index: a0,
      isMounted: false
    };
  }
}, {
  key: "getCellMetrics",
  value: function getCellMetrics(a0, a1) {
    const { data, getItem, getItemCount, getItemLayout } = a1;
    Module38(a0 >= 0 && a0 < getItemCount(data), "Tried to get metrics for out of range cell index " + a0);
    let keyExtractor = a1.keyExtractor;
    if (keyExtractor == null) {
      keyExtractor = _elementsThatOverlapOffsets.keyExtractor;
    }
    const r29 = this._cellMetrics.get(keyExtractor(getItem(data, a0), a0));
    if (r29 && r29.index === a0) {
      return r29;
    }
    if (getItemLayout) {
      const r31 = getItemLayout(data, a0);
      return {
        index: a0,
        length: r31.length,
        offset: r31.offset,
        isMounted: true
      };
    }
    return null;
  }
}, {
  key: "getCellOffsetApprox",
  value: function getCellOffsetApprox(a0, a1) {
    const isInteger = Number.isInteger(a0);
    const getCellMetricsApprox2 = this.getCellMetricsApprox;
    if (isInteger) {
      return getCellMetricsApprox2.call(this, a0, a1).offset;
    }
    const r11 = getCellMetricsApprox2.call(this, Math.floor(a0), a1);
    return r11.offset + (a0 - Math.floor(a0)) * r11.length;
  }
}, {
  key: "getContentLength",
  value: function getContentLength() {
    let _contentLength = this._contentLength;
    if (_contentLength == null) {
      _contentLength = 0;
    }
    return _contentLength;
  }
}, {
  key: "hasContentLength",
  value: function hasContentLength() {
    return this._contentLength != null;
  }
}, {
  key: "flowRelativeOffset",
  value: function flowRelativeOffset(a0, a1) {
    const _orientation = this._orientation;
    const { horizontal, rtl } = _orientation;
    if (horizontal && rtl) {
      const r10 = a1 == null ? this._contentLength : a1;
      Module38(r10 != null, "ListMetricsAggregator must be notified of list content layout before resolving offsets");
      return r10 - (this._selectOffset(a0) + this._selectLength(a0));
    }
    return this._selectOffset(a0);
  }
}, {
  key: "cartesianOffset",
  value: function cartesianOffset(a0) {
    const _orientation = this._orientation;
    const { horizontal, rtl } = _orientation;
    let r7 = a0;
    if (horizontal) {
      r7 = a0;
      if (rtl) {
        Module38(this._contentLength != null, "ListMetricsAggregator must be notified of list content layout before resolving offsets");
        r7 = this._contentLength - a0;
      }
    }
    return r7;
  }
}, {
  key: "_invalidateIfOrientationChanged",
  value: function _invalidateIfOrientationChanged(a0) {
    if (a0.rtl !== this._orientation.rtl) {
      this._cellMetrics.clear();
    }
    if (a0.horizontal !== this._orientation.horizontal) {
      this._averageCellLength = 0;
      this._highestMeasuredCellIndex = 0;
      this._measuredCellsLength = 0;
      this._measuredCellsCount = 0;
    }
    this._orientation = a0;
  }
}, {
  key: "_selectLength",
  value: function _selectLength(a0) {
    const width = a0.width;
    let height = a0.height;
    if (this._orientation.horizontal) {
      height = width;
    }
    return height;
  }
}, {
  key: "_selectOffset",
  value: function _selectOffset(a0) {
    const r1 = a0.x;
    let r3 = a0.y;
    if (this._orientation.horizontal) {
      r3 = r1;
    }
    return r3;
  }
}]);