{"ast":null,"code":"import _extends from \"@babel/runtime/helpers/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/objectWithoutPropertiesLoose\";\nimport _objectSpread from \"@babel/runtime/helpers/objectSpread2\";\nvar _excluded = [\"numColumns\", \"columnWrapperStyle\", \"removeClippedSubviews\", \"strictMode\"];\nimport View from \"../../../exports/View\";\nimport StyleSheet from \"../../../exports/StyleSheet\";\nimport deepDiffer from \"../deepDiffer\";\nimport Platform from \"../../../exports/Platform\";\nimport invariant from 'fbjs/lib/invariant';\nimport * as React from 'react';\nimport VirtualizedList from \"../VirtualizedList\";\nimport { keyExtractor as defaultKeyExtractor } from \"../VirtualizeUtils\";\nimport memoizeOne from 'memoize-one';\nfunction removeClippedSubviewsOrDefault(removeClippedSubviews) {\n return removeClippedSubviews !== null && removeClippedSubviews !== void 0 ? removeClippedSubviews : Platform.OS === 'android';\n}\nfunction numColumnsOrDefault(numColumns) {\n return numColumns !== null && numColumns !== void 0 ? numColumns : 1;\n}\nfunction isArrayLike(data) {\n return typeof Object(data).length === 'number';\n}\nclass FlatList extends React.PureComponent {\n scrollToEnd(params) {\n if (this._listRef) {\n this._listRef.scrollToEnd(params);\n }\n }\n scrollToIndex(params) {\n if (this._listRef) {\n this._listRef.scrollToIndex(params);\n }\n }\n scrollToItem(params) {\n if (this._listRef) {\n this._listRef.scrollToItem(params);\n }\n }\n scrollToOffset(params) {\n if (this._listRef) {\n this._listRef.scrollToOffset(params);\n }\n }\n recordInteraction() {\n if (this._listRef) {\n this._listRef.recordInteraction();\n }\n }\n flashScrollIndicators() {\n if (this._listRef) {\n this._listRef.flashScrollIndicators();\n }\n }\n getScrollResponder() {\n if (this._listRef) {\n return this._listRef.getScrollResponder();\n }\n }\n getNativeScrollRef() {\n if (this._listRef) {\n return this._listRef.getScrollRef();\n }\n }\n getScrollableNode() {\n if (this._listRef) {\n return this._listRef.getScrollableNode();\n }\n }\n constructor(_props) {\n super(_props);\n this._virtualizedListPairs = [];\n this._captureRef = ref => {\n this._listRef = ref;\n };\n this._getItem = (data, index) => {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n if (numColumns > 1) {\n var ret = [];\n for (var kk = 0; kk < numColumns; kk++) {\n var itemIndex = index * numColumns + kk;\n if (itemIndex < data.length) {\n var _item = data[itemIndex];\n ret.push(_item);\n }\n }\n return ret;\n } else {\n return data[index];\n }\n };\n this._getItemCount = data => {\n if (data != null && isArrayLike(data)) {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n return numColumns > 1 ? Math.ceil(data.length / numColumns) : data.length;\n } else {\n return 0;\n }\n };\n this._keyExtractor = (items, index) => {\n var _this$props$keyExtrac;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n var keyExtractor = (_this$props$keyExtrac = this.props.keyExtractor) !== null && _this$props$keyExtrac !== void 0 ? _this$props$keyExtrac : defaultKeyExtractor;\n if (numColumns > 1) {\n invariant(Array.isArray(items), 'FlatList: Encountered internal consistency error, expected each item to consist of an ' + 'array with 1-%s columns; instead, received a single item.', numColumns);\n return items.map((item, kk) => keyExtractor(item, index * numColumns + kk)).join(':');\n }\n return keyExtractor(items, index);\n };\n this._renderer = (ListItemComponent, renderItem, columnWrapperStyle, numColumns, extraData) => {\n var cols = numColumnsOrDefault(numColumns);\n var render = props => {\n if (ListItemComponent) {\n return React.createElement(ListItemComponent, props);\n } else if (renderItem) {\n return renderItem(props);\n } else {\n return null;\n }\n };\n var renderProp = info => {\n if (cols > 1) {\n var _item2 = info.item,\n _index = info.index;\n invariant(Array.isArray(_item2), 'Expected array of items with numColumns > 1');\n return React.createElement(View, {\n style: [styles.row, columnWrapperStyle]\n }, _item2.map((it, kk) => {\n var element = render({\n item: it,\n index: _index * cols + kk,\n separators: info.separators\n });\n return element != null ? React.createElement(React.Fragment, {\n key: kk\n }, element) : null;\n }));\n } else {\n return render(info);\n }\n };\n return ListItemComponent ? {\n ListItemComponent: renderProp\n } : {\n renderItem: renderProp\n };\n };\n this._memoizedRenderer = memoizeOne(this._renderer);\n this._checkProps(this.props);\n if (this.props.viewabilityConfigCallbackPairs) {\n this._virtualizedListPairs = this.props.viewabilityConfigCallbackPairs.map(pair => ({\n viewabilityConfig: pair.viewabilityConfig,\n onViewableItemsChanged: this._createOnViewableItemsChanged(pair.onViewableItemsChanged)\n }));\n } else if (this.props.onViewableItemsChanged) {\n this._virtualizedListPairs.push({\n viewabilityConfig: this.props.viewabilityConfig,\n onViewableItemsChanged: this._createOnViewableItemsChanged(this.props.onViewableItemsChanged)\n });\n }\n }\n componentDidUpdate(prevProps) {\n invariant(prevProps.numColumns === this.props.numColumns, 'Changing numColumns on the fly is not supported. Change the key prop on FlatList when ' + 'changing the number of columns to force a fresh render of the component.');\n invariant(prevProps.onViewableItemsChanged === this.props.onViewableItemsChanged, 'Changing onViewableItemsChanged on the fly is not supported');\n invariant(!deepDiffer(prevProps.viewabilityConfig, this.props.viewabilityConfig), 'Changing viewabilityConfig on the fly is not supported');\n invariant(prevProps.viewabilityConfigCallbackPairs === this.props.viewabilityConfigCallbackPairs, 'Changing viewabilityConfigCallbackPairs on the fly is not supported');\n this._checkProps(this.props);\n }\n _checkProps(props) {\n var getItem = props.getItem,\n getItemCount = props.getItemCount,\n horizontal = props.horizontal,\n columnWrapperStyle = props.columnWrapperStyle,\n onViewableItemsChanged = props.onViewableItemsChanged,\n viewabilityConfigCallbackPairs = props.viewabilityConfigCallbackPairs;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n invariant(!getItem && !getItemCount, 'FlatList does not support custom data formats.');\n if (numColumns > 1) {\n invariant(!horizontal, 'numColumns does not support horizontal.');\n } else {\n invariant(!columnWrapperStyle, 'columnWrapperStyle not supported for single column lists');\n }\n invariant(!(onViewableItemsChanged && viewabilityConfigCallbackPairs), 'FlatList does not support setting both onViewableItemsChanged and ' + 'viewabilityConfigCallbackPairs.');\n }\n _pushMultiColumnViewable(arr, v) {\n var _this$props$keyExtrac2;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n var keyExtractor = (_this$props$keyExtrac2 = this.props.keyExtractor) !== null && _this$props$keyExtrac2 !== void 0 ? _this$props$keyExtrac2 : defaultKeyExtractor;\n v.item.forEach((item, ii) => {\n invariant(v.index != null, 'Missing index!');\n var index = v.index * numColumns + ii;\n arr.push(_objectSpread(_objectSpread({}, v), {}, {\n item,\n key: keyExtractor(item, index),\n index\n }));\n });\n }\n _createOnViewableItemsChanged(onViewableItemsChanged) {\n return info => {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n if (onViewableItemsChanged) {\n if (numColumns > 1) {\n var changed = [];\n var viewableItems = [];\n info.viewableItems.forEach(v => this._pushMultiColumnViewable(viewableItems, v));\n info.changed.forEach(v => this._pushMultiColumnViewable(changed, v));\n onViewableItemsChanged({\n viewableItems,\n changed\n });\n } else {\n onViewableItemsChanged(info);\n }\n }\n };\n }\n render() {\n var _this$props = this.props,\n numColumns = _this$props.numColumns,\n columnWrapperStyle = _this$props.columnWrapperStyle,\n _removeClippedSubviews = _this$props.removeClippedSubviews,\n _this$props$strictMod = _this$props.strictMode,\n strictMode = _this$props$strictMod === void 0 ? false : _this$props$strictMod,\n restProps = _objectWithoutPropertiesLoose(_this$props, _excluded);\n var renderer = strictMode ? this._memoizedRenderer : this._renderer;\n return (React.createElement(VirtualizedList, _extends({}, restProps, {\n getItem: this._getItem,\n getItemCount: this._getItemCount,\n keyExtractor: this._keyExtractor,\n ref: this._captureRef,\n viewabilityConfigCallbackPairs: this._virtualizedListPairs,\n removeClippedSubviews: removeClippedSubviewsOrDefault(_removeClippedSubviews)\n }, renderer(this.props.ListItemComponent, this.props.renderItem, columnWrapperStyle, numColumns, this.props.extraData)))\n );\n }\n}\nvar styles = StyleSheet.create({\n row: {\n flexDirection: 'row'\n }\n});\nexport default FlatList;","map":{"version":3,"names":["_extends","_objectWithoutPropertiesLoose","_objectSpread","_excluded","View","StyleSheet","deepDiffer","Platform","invariant","React","VirtualizedList","keyExtractor","defaultKeyExtractor","memoizeOne","removeClippedSubviewsOrDefault","removeClippedSubviews","OS","numColumnsOrDefault","numColumns","isArrayLike","data","Object","length","FlatList","PureComponent","scrollToEnd","params","_listRef","scrollToIndex","scrollToItem","scrollToOffset","recordInteraction","flashScrollIndicators","getScrollResponder","getNativeScrollRef","getScrollRef","getScrollableNode","constructor","_props","_virtualizedListPairs","_captureRef","ref","_getItem","index","props","ret","kk","itemIndex","_item","push","_getItemCount","Math","ceil","_keyExtractor","items","_this$props$keyExtrac","Array","isArray","map","item","join","_renderer","ListItemComponent","renderItem","columnWrapperStyle","extraData","cols","render","createElement","renderProp","info","_item2","_index","style","styles","row","it","element","separators","Fragment","key","_memoizedRenderer","_checkProps","viewabilityConfigCallbackPairs","pair","viewabilityConfig","onViewableItemsChanged","_createOnViewableItemsChanged","componentDidUpdate","prevProps","getItem","getItemCount","horizontal","_pushMultiColumnViewable","arr","v","_this$props$keyExtrac2","forEach","ii","changed","viewableItems","_this$props","_removeClippedSubviews","_this$props$strictMod","strictMode","restProps","renderer","create","flexDirection"],"sources":["/Users/pmouli/Documents/GitHub.nosync/boots-strapper/mobile/node_modules/react-native-web/dist/vendor/react-native/FlatList/index.js"],"sourcesContent":["import _extends from \"@babel/runtime/helpers/extends\";\nimport _objectWithoutPropertiesLoose from \"@babel/runtime/helpers/objectWithoutPropertiesLoose\";\nimport _objectSpread from \"@babel/runtime/helpers/objectSpread2\";\nvar _excluded = [\"numColumns\", \"columnWrapperStyle\", \"removeClippedSubviews\", \"strictMode\"];\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\nimport View from '../../../exports/View';\nimport StyleSheet from '../../../exports/StyleSheet';\nimport deepDiffer from '../deepDiffer';\nimport Platform from '../../../exports/Platform';\nimport invariant from 'fbjs/lib/invariant';\nimport * as React from 'react';\nimport VirtualizedList from '../VirtualizedList';\nimport { keyExtractor as defaultKeyExtractor } from '../VirtualizeUtils';\nimport memoizeOne from 'memoize-one';\n/**\n * Default Props Helper Functions\n * Use the following helper functions for default values\n */\n\n// removeClippedSubviewsOrDefault(this.props.removeClippedSubviews)\nfunction removeClippedSubviewsOrDefault(removeClippedSubviews) {\n return removeClippedSubviews !== null && removeClippedSubviews !== void 0 ? removeClippedSubviews : Platform.OS === 'android';\n}\n\n// numColumnsOrDefault(this.props.numColumns)\nfunction numColumnsOrDefault(numColumns) {\n return numColumns !== null && numColumns !== void 0 ? numColumns : 1;\n}\nfunction isArrayLike(data) {\n // $FlowExpectedError[incompatible-use]\n return typeof Object(data).length === 'number';\n}\n/**\n * A performant interface for rendering simple, flat lists, supporting the most handy features:\n *\n * - Fully cross-platform.\n * - Optional horizontal mode.\n * - Configurable viewability callbacks.\n * - Header support.\n * - Footer support.\n * - Separator support.\n * - Pull to Refresh.\n * - Scroll loading.\n * - ScrollToIndex support.\n *\n * If you need section support, use [``](docs/sectionlist.html).\n *\n * Minimal Example:\n *\n * {item.key}}\n * />\n *\n * More complex, multi-select example demonstrating `PureComponent` usage for perf optimization and avoiding bugs.\n *\n * - By binding the `onPressItem` handler, the props will remain `===` and `PureComponent` will\n * prevent wasteful re-renders unless the actual `id`, `selected`, or `title` props change, even\n * if the components rendered in `MyListItem` did not have such optimizations.\n * - By passing `extraData={this.state}` to `FlatList` we make sure `FlatList` itself will re-render\n * when the `state.selected` changes. Without setting this prop, `FlatList` would not know it\n * needs to re-render any items because it is also a `PureComponent` and the prop comparison will\n * not show any changes.\n * - `keyExtractor` tells the list to use the `id`s for the react keys instead of the default `key` property.\n *\n *\n * class MyListItem extends React.PureComponent {\n * _onPress = () => {\n * this.props.onPressItem(this.props.id);\n * };\n *\n * render() {\n * const textColor = this.props.selected ? \"red\" : \"black\";\n * return (\n * \n * \n * \n * {this.props.title}\n * \n * \n * \n * );\n * }\n * }\n *\n * class MultiSelectList extends React.PureComponent {\n * state = {selected: (new Map(): Map)};\n *\n * _keyExtractor = (item, index) => item.id;\n *\n * _onPressItem = (id: string) => {\n * // updater functions are preferred for transactional updates\n * this.setState((state) => {\n * // copy the map rather than modifying state.\n * const selected = new Map(state.selected);\n * selected.set(id, !selected.get(id)); // toggle\n * return {selected};\n * });\n * };\n *\n * _renderItem = ({item}) => (\n * \n * );\n *\n * render() {\n * return (\n * \n * );\n * }\n * }\n *\n * This is a convenience wrapper around [``](docs/virtualizedlist.html),\n * and thus inherits its props (as well as those of `ScrollView`) that aren't explicitly listed\n * here, along with the following caveats:\n *\n * - Internal state is not preserved when content scrolls out of the render window. Make sure all\n * your data is captured in the item data or external stores like Flux, Redux, or Relay.\n * - This is a `PureComponent` which means that it will not re-render if `props` remain shallow-\n * equal. Make sure that everything your `renderItem` function depends on is passed as a prop\n * (e.g. `extraData`) that is not `===` after updates, otherwise your UI may not update on\n * changes. This includes the `data` prop and parent component state.\n * - In order to constrain memory and enable smooth scrolling, content is rendered asynchronously\n * offscreen. This means it's possible to scroll faster than the fill rate ands momentarily see\n * blank content. This is a tradeoff that can be adjusted to suit the needs of each application,\n * and we are working on improving it behind the scenes.\n * - By default, the list looks for a `key` prop on each item and uses that for the React key.\n * Alternatively, you can provide a custom `keyExtractor` prop.\n *\n * Also inherits [ScrollView Props](docs/scrollview.html#props), unless it is nested in another FlatList of same orientation.\n */\nclass FlatList extends React.PureComponent {\n /**\n * Scrolls to the end of the content. May be janky without `getItemLayout` prop.\n */\n scrollToEnd(params) {\n if (this._listRef) {\n this._listRef.scrollToEnd(params);\n }\n }\n\n /**\n * Scrolls to the item at the specified index such that it is positioned in the viewable area\n * such that `viewPosition` 0 places it at the top, 1 at the bottom, and 0.5 centered in the\n * middle. `viewOffset` is a fixed number of pixels to offset the final target position.\n *\n * Note: cannot scroll to locations outside the render window without specifying the\n * `getItemLayout` prop.\n */\n scrollToIndex(params) {\n if (this._listRef) {\n this._listRef.scrollToIndex(params);\n }\n }\n\n /**\n * Requires linear scan through data - use `scrollToIndex` instead if possible.\n *\n * Note: cannot scroll to locations outside the render window without specifying the\n * `getItemLayout` prop.\n */\n scrollToItem(params) {\n if (this._listRef) {\n this._listRef.scrollToItem(params);\n }\n }\n\n /**\n * Scroll to a specific content pixel offset in the list.\n *\n * Check out [scrollToOffset](docs/virtualizedlist.html#scrolltooffset) of VirtualizedList\n */\n scrollToOffset(params) {\n if (this._listRef) {\n this._listRef.scrollToOffset(params);\n }\n }\n\n /**\n * Tells the list an interaction has occurred, which should trigger viewability calculations, e.g.\n * if `waitForInteractions` is true and the user has not scrolled. This is typically called by\n * taps on items or by navigation actions.\n */\n recordInteraction() {\n if (this._listRef) {\n this._listRef.recordInteraction();\n }\n }\n\n /**\n * Displays the scroll indicators momentarily.\n *\n * @platform ios\n */\n flashScrollIndicators() {\n if (this._listRef) {\n this._listRef.flashScrollIndicators();\n }\n }\n\n /**\n * Provides a handle to the underlying scroll responder.\n */\n getScrollResponder() {\n if (this._listRef) {\n return this._listRef.getScrollResponder();\n }\n }\n\n /**\n * Provides a reference to the underlying host component\n */\n getNativeScrollRef() {\n if (this._listRef) {\n /* $FlowFixMe[incompatible-return] Suppresses errors found when fixing\n * TextInput typing */\n return this._listRef.getScrollRef();\n }\n }\n getScrollableNode() {\n if (this._listRef) {\n return this._listRef.getScrollableNode();\n }\n }\n constructor(_props) {\n super(_props);\n this._virtualizedListPairs = [];\n this._captureRef = ref => {\n this._listRef = ref;\n };\n this._getItem = (data, index) => {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n if (numColumns > 1) {\n var ret = [];\n for (var kk = 0; kk < numColumns; kk++) {\n var itemIndex = index * numColumns + kk;\n if (itemIndex < data.length) {\n var _item = data[itemIndex];\n ret.push(_item);\n }\n }\n return ret;\n } else {\n return data[index];\n }\n };\n this._getItemCount = data => {\n // Legacy behavior of FlatList was to forward \"undefined\" length if invalid\n // data like a non-arraylike object is passed. VirtualizedList would then\n // coerce this, and the math would work out to no-op. For compatibility, if\n // invalid data is passed, we tell VirtualizedList there are zero items\n // available to prevent it from trying to read from the invalid data\n // (without propagating invalidly typed data).\n if (data != null && isArrayLike(data)) {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n return numColumns > 1 ? Math.ceil(data.length / numColumns) : data.length;\n } else {\n return 0;\n }\n };\n this._keyExtractor = (items, index) => {\n var _this$props$keyExtrac;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n var keyExtractor = (_this$props$keyExtrac = this.props.keyExtractor) !== null && _this$props$keyExtrac !== void 0 ? _this$props$keyExtrac : defaultKeyExtractor;\n if (numColumns > 1) {\n invariant(Array.isArray(items), 'FlatList: Encountered internal consistency error, expected each item to consist of an ' + 'array with 1-%s columns; instead, received a single item.', numColumns);\n return items.map((item, kk) => keyExtractor(item, index * numColumns + kk)).join(':');\n }\n\n // $FlowFixMe[incompatible-call] Can't call keyExtractor with an array\n return keyExtractor(items, index);\n };\n this._renderer = (ListItemComponent, renderItem, columnWrapperStyle, numColumns, extraData\n // $FlowFixMe[missing-local-annot]\n ) => {\n var cols = numColumnsOrDefault(numColumns);\n var render = props => {\n if (ListItemComponent) {\n // $FlowFixMe[not-a-component] Component isn't valid\n // $FlowFixMe[incompatible-type-arg] Component isn't valid\n // $FlowFixMe[incompatible-return] Component isn't valid\n return /*#__PURE__*/React.createElement(ListItemComponent, props);\n } else if (renderItem) {\n // $FlowFixMe[incompatible-call]\n return renderItem(props);\n } else {\n return null;\n }\n };\n var renderProp = info => {\n if (cols > 1) {\n var _item2 = info.item,\n _index = info.index;\n invariant(Array.isArray(_item2), 'Expected array of items with numColumns > 1');\n return /*#__PURE__*/React.createElement(View, {\n style: [styles.row, columnWrapperStyle]\n }, _item2.map((it, kk) => {\n var element = render({\n // $FlowFixMe[incompatible-call]\n item: it,\n index: _index * cols + kk,\n separators: info.separators\n });\n return element != null ? /*#__PURE__*/React.createElement(React.Fragment, {\n key: kk\n }, element) : null;\n }));\n } else {\n return render(info);\n }\n };\n return ListItemComponent ? {\n ListItemComponent: renderProp\n } : {\n renderItem: renderProp\n };\n };\n this._memoizedRenderer = memoizeOne(this._renderer);\n this._checkProps(this.props);\n if (this.props.viewabilityConfigCallbackPairs) {\n this._virtualizedListPairs = this.props.viewabilityConfigCallbackPairs.map(pair => ({\n viewabilityConfig: pair.viewabilityConfig,\n onViewableItemsChanged: this._createOnViewableItemsChanged(pair.onViewableItemsChanged)\n }));\n } else if (this.props.onViewableItemsChanged) {\n this._virtualizedListPairs.push({\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 viewabilityConfig: this.props.viewabilityConfig,\n onViewableItemsChanged: this._createOnViewableItemsChanged(this.props.onViewableItemsChanged)\n });\n }\n }\n\n // $FlowFixMe[missing-local-annot]\n componentDidUpdate(prevProps) {\n invariant(prevProps.numColumns === this.props.numColumns, 'Changing numColumns on the fly is not supported. Change the key prop on FlatList when ' + 'changing the number of columns to force a fresh render of the component.');\n invariant(prevProps.onViewableItemsChanged === this.props.onViewableItemsChanged, 'Changing onViewableItemsChanged on the fly is not supported');\n invariant(!deepDiffer(prevProps.viewabilityConfig, this.props.viewabilityConfig), 'Changing viewabilityConfig on the fly is not supported');\n invariant(prevProps.viewabilityConfigCallbackPairs === this.props.viewabilityConfigCallbackPairs, 'Changing viewabilityConfigCallbackPairs on the fly is not supported');\n this._checkProps(this.props);\n }\n // $FlowFixMe[missing-local-annot]\n _checkProps(props) {\n var getItem = props.getItem,\n getItemCount = props.getItemCount,\n horizontal = props.horizontal,\n columnWrapperStyle = props.columnWrapperStyle,\n onViewableItemsChanged = props.onViewableItemsChanged,\n viewabilityConfigCallbackPairs = props.viewabilityConfigCallbackPairs;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n invariant(!getItem && !getItemCount, 'FlatList does not support custom data formats.');\n if (numColumns > 1) {\n invariant(!horizontal, 'numColumns does not support horizontal.');\n } else {\n invariant(!columnWrapperStyle, 'columnWrapperStyle not supported for single column lists');\n }\n invariant(!(onViewableItemsChanged && viewabilityConfigCallbackPairs), 'FlatList does not support setting both onViewableItemsChanged and ' + 'viewabilityConfigCallbackPairs.');\n }\n _pushMultiColumnViewable(arr, v) {\n var _this$props$keyExtrac2;\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n var keyExtractor = (_this$props$keyExtrac2 = this.props.keyExtractor) !== null && _this$props$keyExtrac2 !== void 0 ? _this$props$keyExtrac2 : defaultKeyExtractor;\n v.item.forEach((item, ii) => {\n invariant(v.index != null, 'Missing index!');\n var index = v.index * numColumns + ii;\n arr.push(_objectSpread(_objectSpread({}, v), {}, {\n item,\n key: keyExtractor(item, index),\n index\n }));\n });\n }\n _createOnViewableItemsChanged(onViewableItemsChanged\n // $FlowFixMe[missing-local-annot]\n ) {\n return info => {\n var numColumns = numColumnsOrDefault(this.props.numColumns);\n if (onViewableItemsChanged) {\n if (numColumns > 1) {\n var changed = [];\n var viewableItems = [];\n info.viewableItems.forEach(v => this._pushMultiColumnViewable(viewableItems, v));\n info.changed.forEach(v => this._pushMultiColumnViewable(changed, v));\n onViewableItemsChanged({\n viewableItems,\n changed\n });\n } else {\n onViewableItemsChanged(info);\n }\n }\n };\n }\n\n // $FlowFixMe[missing-local-annot]\n\n render() {\n var _this$props = this.props,\n numColumns = _this$props.numColumns,\n columnWrapperStyle = _this$props.columnWrapperStyle,\n _removeClippedSubviews = _this$props.removeClippedSubviews,\n _this$props$strictMod = _this$props.strictMode,\n strictMode = _this$props$strictMod === void 0 ? false : _this$props$strictMod,\n restProps = _objectWithoutPropertiesLoose(_this$props, _excluded);\n var renderer = strictMode ? this._memoizedRenderer : this._renderer;\n return (\n /*#__PURE__*/\n // $FlowFixMe[incompatible-exact] - `restProps` (`Props`) is inexact.\n React.createElement(VirtualizedList, _extends({}, restProps, {\n getItem: this._getItem,\n getItemCount: this._getItemCount,\n keyExtractor: this._keyExtractor,\n ref: this._captureRef,\n viewabilityConfigCallbackPairs: this._virtualizedListPairs,\n removeClippedSubviews: removeClippedSubviewsOrDefault(_removeClippedSubviews)\n }, renderer(this.props.ListItemComponent, this.props.renderItem, columnWrapperStyle, numColumns, this.props.extraData)))\n );\n }\n}\nvar styles = StyleSheet.create({\n row: {\n flexDirection: 'row'\n }\n});\nexport default 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