react-native-big-list
Version:
A big and fast list implementation for react-native with a recycler API focused on performance and ram usage while processing thousand items on the list.
80 lines (79 loc) • 3.65 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _react = _interopRequireWildcard(require("react"));
var _propTypes = _interopRequireDefault(require("prop-types"));
var _reactNative = require("react-native");
var _utils = require("./utils");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function _getRequireWildcardCache(nodeInterop) { if (typeof WeakMap !== "function") return null; var cacheBabelInterop = new WeakMap(); var cacheNodeInterop = new WeakMap(); return (_getRequireWildcardCache = function (nodeInterop) { return nodeInterop ? cacheNodeInterop : cacheBabelInterop; })(nodeInterop); }
function _interopRequireWildcard(obj, nodeInterop) { if (!nodeInterop && obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(nodeInterop); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (key !== "default" && Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
/**
* List section.
* @param {object|array} style
* @param {number} position
* @param {number} height
* @param {number} nextSectionPosition
* @param {Animated.Value} scrollTopValue
* @param {React.node} children
* @returns {JSX.Element}
* @constructor
*/
const BigListSection = _ref => {
let {
style,
position,
height,
nextSectionPosition,
scrollTopValue,
children
} = _ref;
const inputRange = [-1, 0];
const outputRange = [0, 0];
inputRange.push(position);
outputRange.push(0);
const collisionPoint = (nextSectionPosition || 0) - height;
if (collisionPoint >= position) {
inputRange.push(collisionPoint, collisionPoint + 1);
outputRange.push(collisionPoint - position, collisionPoint - position);
} else {
inputRange.push(position + 1);
outputRange.push(1);
}
const translateY = scrollTopValue.interpolate({
inputRange,
outputRange
});
const child = _react.default.Children.only(children);
const fillChildren = /*#__PURE__*/_react.default.isValidElement(child) && /*#__PURE__*/_react.default.cloneElement(child, (0, _utils.mergeViewStyle)(style, {
style: {
flex: 1
}
}));
const viewStyle = [{
elevation: 10
}, /*#__PURE__*/_react.default.isValidElement(child) && child.props.style ? child.props.style : style, {
zIndex: 10,
height: height,
width: "100%",
transform: [{
translateY
}]
}];
return /*#__PURE__*/_react.default.createElement(_reactNative.Animated.View, {
style: viewStyle
}, fillChildren);
};
BigListSection.propTypes = {
children: _propTypes.default.oneOfType([_propTypes.default.arrayOf(_propTypes.default.node), _propTypes.default.node]),
height: _propTypes.default.number,
nextSectionPosition: _propTypes.default.number,
position: _propTypes.default.number,
scrollTopValue: _propTypes.default.instanceOf(_reactNative.Animated.Value),
style: _propTypes.default.oneOfType([_propTypes.default.object, _propTypes.default.array])
};
var _default = /*#__PURE__*/(0, _react.memo)(BigListSection);
exports.default = _default;
//# sourceMappingURL=BigListSection.js.map