react-native-wagmi-charts/lib/module/charts/line/Context.js

A sweet candlestick chart for React Native

import React, { createContext, useMemo } from 'react';
import {
  runOnJS,
  useAnimatedReaction,
  useSharedValue,
} from 'react-native-reanimated';
import { LineChartDataProvider } from './Data';
import { getDomain, lineChartDataPropToArray } from './utils';
export const LineChartContext = /*#__PURE__*/ createContext({
  currentX: {
    value: -1,
  },
  currentIndex: {
    value: -1,
  },
  domain: [0, 0],
  isActive: {
    value: false,
  },
  yDomain: {
    min: 0,
    max: 0,
  },
  xDomain: undefined,
  xLength: 0,
});
export function LineChartProvider({
  children,
  data = [],
  yRange,
  onCurrentIndexChange,
  xLength,
  xDomain,
}) {
  const currentX = useSharedValue(-1);
  const currentIndex = useSharedValue(-1);
  const isActive = useSharedValue(false);
  const domain = useMemo(
    () => getDomain(Array.isArray(data) ? data : Object.values(data)[0]),
    [data]
  );
  const values = useMemo(
    () => lineChartDataPropToArray(data).map(({ value }) => value),
    [data]
  );
  const yDomainValues = useMemo(
    () => ({
      min: yRange?.min ?? Math.min(...values),
      max: yRange?.max ?? Math.max(...values),
    }),
    [values, yRange?.min, yRange?.max]
  );
  const contextValue = useMemo(() => {
    const domainRows = Array.isArray(data) ? data : Object.values(data)[0];
    return {
      currentX,
      currentIndex,
      isActive,
      domain,
      yDomain: yDomainValues,
      xDomain,
      xLength: xLength ?? domainRows.length,
    };
  }, [
    currentIndex,
    currentX,
    data,
    domain,
    isActive,
    yDomainValues,
    xLength,
    xDomain,
  ]);
  useAnimatedReaction(
    () => currentIndex.value,
    (x, prevX) => {
      if (x !== prevX && onCurrentIndexChange) {
        runOnJS(onCurrentIndexChange)(x);
      }
    },
    [currentIndex]
  );
  return /*#__PURE__*/ React.createElement(
    LineChartDataProvider,
    {
      data: data,
    },
    /*#__PURE__*/ React.createElement(
      LineChartContext.Provider,
      {
        value: contextValue,
      },
      children
    )
  );
}
LineChartProvider.displayName = 'LineChartProvider';
//# sourceMappingURL=Context.js.map