{"dependencies":[{"name":"@babel/runtime/helpers/objectSpread2","data":{"asyncType":null,"isESMImport":true,"locs":[{"start":{"line":13,"column":0,"index":225},"end":{"line":13,"column":65,"index":290}}],"key":"SfRhzMj3Ex6qA89WTFEUm9Lj49A=","exportNames":["*"],"imports":1}},{"name":"@babel/runtime/helpers/createForOfIteratorHelperLoose","data":{"asyncType":null,"isESMImport":true,"locs":[{"start":{"line":14,"column":0,"index":291},"end":{"line":14,"column":100,"index":391}}],"key":"Y/2Rvrgl4aDxeJKdk1U58Vc2xw8=","exportNames":["*"],"imports":1}},{"name":"fbjs/lib/invariant","data":{"asyncType":null,"isESMImport":true,"locs":[{"start":{"line":15,"column":0,"index":392},"end":{"line":15,"column":43,"index":435}}],"key":"bGUa+dDG2WEhPiIlobT3urS95UE=","exportNames":["*"],"imports":1}}],"output":[{"data":{"code":"__d(function (global, require, _$$_IMPORT_DEFAULT, _$$_IMPORT_ALL, module, exports, _dependencyMap) {\n  /**\n   * Copyright (c) Meta Platforms, Inc. and affiliates.\n   *\n   * This source code is licensed under the MIT license found in the\n   * LICENSE file in the root directory of this source tree.\n   *\n   * \n   * @format\n   */\n\n  'use strict';\n\n  Object.defineProperty(exports, '__esModule', {\n    value: true\n  });\n  function _interopDefault(e) {\n    return e && e.__esModule ? e : {\n      default: e\n    };\n  }\n  Object.defineProperty(exports, \"default\", {\n    enumerable: true,\n    get: function () {\n      return _default;\n    }\n  });\n  var _babelRuntimeHelpersObjectSpread = require(_dependencyMap[0], \"@babel/runtime/helpers/objectSpread2\");\n  var _objectSpread = _interopDefault(_babelRuntimeHelpersObjectSpread);\n  var _babelRuntimeHelpersCreateForOfIteratorHelperLoose = require(_dependencyMap[1], \"@babel/runtime/helpers/createForOfIteratorHelperLoose\");\n  var _createForOfIteratorHelperLoose = _interopDefault(_babelRuntimeHelpersCreateForOfIteratorHelperLoose);\n  var _fbjsLibInvariant = require(_dependencyMap[2], \"fbjs/lib/invariant\");\n  var invariant = _interopDefault(_fbjsLibInvariant);\n  /**\n   * A Utility class for calculating viewable items based on current metrics like scroll position and\n   * layout.\n   *\n   * An item is said to be in a \"viewable\" state when any of the following\n   * is true for longer than `minimumViewTime` milliseconds (after an interaction if `waitForInteraction`\n   * is true):\n   *\n   * - Occupying >= `viewAreaCoveragePercentThreshold` of the view area XOR fraction of the item\n   *   visible in the view area >= `itemVisiblePercentThreshold`.\n   * - Entirely visible on screen\n   */\n  class ViewabilityHelper {\n    constructor(config) {\n      if (config === void 0) {\n        config = {\n          viewAreaCoveragePercentThreshold: 0\n        };\n      }\n      this._hasInteracted = false;\n      this._timers = new Set();\n      this._viewableIndices = [];\n      this._viewableItems = new Map();\n      this._config = config;\n    }\n\n    /**\n     * Cleanup, e.g. on unmount. Clears any pending timers.\n     */\n    dispose() {\n      /* $FlowFixMe[incompatible-call] (>=0.63.0 site=react_native_fb) This\n       * comment suppresses an error found when Flow v0.63 was deployed. To see\n       * the error delete this comment and run Flow. */\n      this._timers.forEach(clearTimeout);\n    }\n\n    /**\n     * Determines which items are viewable based on the current metrics and config.\n     */\n    computeViewableItems(props, scrollOffset, viewportHeight, getFrameMetrics,\n    // Optional optimization to reduce the scan size\n    renderRange) {\n      var itemCount = props.getItemCount(props.data);\n      var _this$_config = this._config,\n        itemVisiblePercentThreshold = _this$_config.itemVisiblePercentThreshold,\n        viewAreaCoveragePercentThreshold = _this$_config.viewAreaCoveragePercentThreshold;\n      var viewAreaMode = viewAreaCoveragePercentThreshold != null;\n      var viewablePercentThreshold = viewAreaMode ? viewAreaCoveragePercentThreshold : itemVisiblePercentThreshold;\n      (0, invariant.default)(viewablePercentThreshold != null && itemVisiblePercentThreshold != null !== (viewAreaCoveragePercentThreshold != null), 'Must set exactly one of itemVisiblePercentThreshold or viewAreaCoveragePercentThreshold');\n      var viewableIndices = [];\n      if (itemCount === 0) {\n        return viewableIndices;\n      }\n      var firstVisible = -1;\n      var _ref = renderRange || {\n          first: 0,\n          last: itemCount - 1\n        },\n        first = _ref.first,\n        last = _ref.last;\n      if (last >= itemCount) {\n        console.warn('Invalid render range computing viewability ' + JSON.stringify({\n          renderRange,\n          itemCount\n        }));\n        return [];\n      }\n      for (var idx = first; idx <= last; idx++) {\n        var metrics = getFrameMetrics(idx, props);\n        if (!metrics) {\n          continue;\n        }\n        var top = metrics.offset - scrollOffset;\n        var bottom = top + metrics.length;\n        if (top < viewportHeight && bottom > 0) {\n          firstVisible = idx;\n          if (_isViewable(viewAreaMode, viewablePercentThreshold, top, bottom, viewportHeight, metrics.length)) {\n            viewableIndices.push(idx);\n          }\n        } else if (firstVisible >= 0) {\n          break;\n        }\n      }\n      return viewableIndices;\n    }\n\n    /**\n     * Figures out which items are viewable and how that has changed from before and calls\n     * `onViewableItemsChanged` as appropriate.\n     */\n    onUpdate(props, scrollOffset, viewportHeight, getFrameMetrics, createViewToken, onViewableItemsChanged,\n    // Optional optimization to reduce the scan size\n    renderRange) {\n      var itemCount = props.getItemCount(props.data);\n      if (this._config.waitForInteraction && !this._hasInteracted || itemCount === 0 || !getFrameMetrics(0, props)) {\n        return;\n      }\n      var viewableIndices = [];\n      if (itemCount) {\n        viewableIndices = this.computeViewableItems(props, scrollOffset, viewportHeight, getFrameMetrics, renderRange);\n      }\n      if (this._viewableIndices.length === viewableIndices.length && this._viewableIndices.every((v, ii) => v === viewableIndices[ii])) {\n        // We might get a lot of scroll events where visibility doesn't change and we don't want to do\n        // extra work in those cases.\n        return;\n      }\n      this._viewableIndices = viewableIndices;\n      if (this._config.minimumViewTime) {\n        var handle = setTimeout(() => {\n          /* $FlowFixMe[incompatible-call] (>=0.63.0 site=react_native_fb) This\n           * comment suppresses an error found when Flow v0.63 was deployed. To\n           * see the error delete this comment and run Flow. */\n          this._timers.delete(handle);\n          this._onUpdateSync(props, viewableIndices, onViewableItemsChanged, createViewToken);\n        }, this._config.minimumViewTime);\n        /* $FlowFixMe[incompatible-call] (>=0.63.0 site=react_native_fb) This\n         * comment suppresses an error found when Flow v0.63 was deployed. To see\n         * the error delete this comment and run Flow. */\n        this._timers.add(handle);\n      } else {\n        this._onUpdateSync(props, viewableIndices, onViewableItemsChanged, createViewToken);\n      }\n    }\n\n    /**\n     * clean-up cached _viewableIndices to evaluate changed items on next update\n     */\n    resetViewableIndices() {\n      this._viewableIndices = [];\n    }\n\n    /**\n     * Records that an interaction has happened even if there has been no scroll.\n     */\n    recordInteraction() {\n      this._hasInteracted = true;\n    }\n    _onUpdateSync(props, viewableIndicesToCheck, onViewableItemsChanged, createViewToken) {\n      // Filter out indices that have gone out of view since this call was scheduled.\n      viewableIndicesToCheck = viewableIndicesToCheck.filter(ii => this._viewableIndices.includes(ii));\n      var prevItems = this._viewableItems;\n      var nextItems = new Map(viewableIndicesToCheck.map(ii => {\n        var viewable = createViewToken(ii, true, props);\n        return [viewable.key, viewable];\n      }));\n      var changed = [];\n      for (var _iterator = (0, _createForOfIteratorHelperLoose.default)(nextItems), _step; !(_step = _iterator()).done;) {\n        var _step$value = _step.value,\n          key = _step$value[0],\n          viewable = _step$value[1];\n        if (!prevItems.has(key)) {\n          changed.push(viewable);\n        }\n      }\n      for (var _iterator2 = (0, _createForOfIteratorHelperLoose.default)(prevItems), _step2; !(_step2 = _iterator2()).done;) {\n        var _step2$value = _step2.value,\n          _key = _step2$value[0],\n          _viewable = _step2$value[1];\n        if (!nextItems.has(_key)) {\n          changed.push((0, _objectSpread.default)((0, _objectSpread.default)({}, _viewable), {}, {\n            isViewable: false\n          }));\n        }\n      }\n      if (changed.length > 0) {\n        this._viewableItems = nextItems;\n        onViewableItemsChanged({\n          viewableItems: Array.from(nextItems.values()),\n          changed,\n          viewabilityConfig: this._config\n        });\n      }\n    }\n  }\n  function _isViewable(viewAreaMode, viewablePercentThreshold, top, bottom, viewportHeight, itemLength) {\n    if (_isEntirelyVisible(top, bottom, viewportHeight)) {\n      return true;\n    } else {\n      var pixels = _getPixelsVisible(top, bottom, viewportHeight);\n      var percent = 100 * (viewAreaMode ? pixels / viewportHeight : pixels / itemLength);\n      return percent >= viewablePercentThreshold;\n    }\n  }\n  function _getPixelsVisible(top, bottom, viewportHeight) {\n    var visibleHeight = Math.min(bottom, viewportHeight) - Math.max(top, 0);\n    return Math.max(0, visibleHeight);\n  }\n  function _isEntirelyVisible(top, bottom, viewportHeight) {\n    return top >= 0 && bottom <= viewportHeight && bottom > top;\n  }\n  var _default = 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