react95-native/dist/module/components/Toolbar/Toolbar.js

Refreshed Windows 95 style UI components for your React Native app

function _extends() { _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; }; return _extends.apply(this, arguments); }

import React from 'react';
import { StyleSheet, View, ScrollView as RNScrollView } from 'react-native';
import { ChevronIcon } from '../..';
const chevronIconSize = 20;

// TODO: performance improvements (callbacks, refs ...etc)
const ScrollView = ({
  children,
  scrollViewProps = {},
  style,
  ...rest
}) => {
  const [contentOffset, setContentOffset] = React.useState(0);
  const [contentSize, setContentSize] = React.useState(0);
  const [scrollViewSize, setScrollViewSize] = React.useState(0); // TODO: that's a naive approach. if it causes problems
  // trigger a callback when last child becomes fully visible

  const lastElementVisible = contentOffset + scrollViewSize < contentSize - chevronIconSize;

  const handleScroll = e => {
    var _scrollViewProps$onSc;

    (_scrollViewProps$onSc = scrollViewProps.onScroll) === null || _scrollViewProps$onSc === void 0 ? void 0 : _scrollViewProps$onSc.call(scrollViewProps, e);
    setContentOffset(e.nativeEvent.contentOffset.x);
  };

  const handleContentSizeChange = (width, height) => {
    var _scrollViewProps$onCo;

    (_scrollViewProps$onCo = scrollViewProps.onContentSizeChange) === null || _scrollViewProps$onCo === void 0 ? void 0 : _scrollViewProps$onCo.call(scrollViewProps, width, height);
    setContentSize(width);
  };

  const handleLayout = e => {
    var _scrollViewProps$onLa;

    (_scrollViewProps$onLa = scrollViewProps.onLayout) === null || _scrollViewProps$onLa === void 0 ? void 0 : _scrollViewProps$onLa.call(scrollViewProps, e);
    setScrollViewSize(e.nativeEvent.layout.width);
  };

  return /*#__PURE__*/React.createElement(View, _extends({
    style: [styles.wrapper, {
      flexDirection: 'row'
    }, style]
  }, rest), /*#__PURE__*/React.createElement(View, {
    style: [styles.content]
  }, /*#__PURE__*/React.createElement(RNScrollView, _extends({}, scrollViewProps, {
    showsHorizontalScrollIndicator: false,
    scrollEventThrottle: 100,
    onScroll: handleScroll,
    onContentSizeChange: handleContentSizeChange,
    onLayout: handleLayout,
    horizontal: true
  }), children)), /*#__PURE__*/React.createElement(View, {
    style: styles.chevronIcon
  }, lastElementVisible && /*#__PURE__*/React.createElement(React.Fragment, null, /*#__PURE__*/React.createElement(ChevronIcon, {
    segments: 3,
    direction: "right",
    style: {
      marginRight: 1
    }
  }), /*#__PURE__*/React.createElement(ChevronIcon, {
    segments: 3,
    direction: "right"
  }))));
};

const styles = StyleSheet.create({
  wrapper: {
    display: 'flex',
    position: 'relative'
  },
  content: {
    flexGrow: 1,
    flexShrink: 1
  },
  chevronIcon: {
    justifyContent: 'center',
    flexDirection: 'row',
    alignSelf: 'flex-start',
    width: chevronIconSize
  }
});
export default ScrollView;
//# sourceMappingURL=Toolbar.js.map