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

A sweet candlestick chart for React Native

function _extends() {
  return (
    (_extends = Object.assign
      ? Object.assign.bind()
      : function (n) {
          for (var e = 1; e < arguments.length; e++) {
            var t = arguments[e];
            for (var r in t) ({}).hasOwnProperty.call(t, r) && (n[r] = t[r]);
          }
          return n;
        }),
    _extends.apply(null, arguments)
  );
}
import React from 'react';
import Animated, {
  useAnimatedStyle,
  useDerivedValue,
  useSharedValue,
  withTiming,
} from 'react-native-reanimated';
import { StyleSheet } from 'react-native';
import { LineChartPriceText } from './PriceText';
import { CursorContext } from './Cursor';
import { LineChartDimensionsContext } from './Chart';
import { getXPositionForCurve } from './utils/getXPositionForCurve';
import { getYForX } from 'react-native-redash';
import { useLineChart } from './useLineChart';
import { useMemo } from 'react';
LineChartTooltip.displayName = 'LineChartTooltip';
export function LineChartTooltip({
  children,
  format,
  xGutter = 8,
  yGutter = 8,
  cursorGutter = 48,
  position = 'top',
  withHorizontalFloating = false,
  textProps,
  textStyle,
  at,
  ...props
}) {
  const { width, height, parsedPath } = React.useContext(
    LineChartDimensionsContext
  );
  const { type } = React.useContext(CursorContext);
  const { currentX, currentY, isActive } = useLineChart();
  const elementWidth = useSharedValue(0);
  const elementHeight = useSharedValue(0);
  const handleLayout = React.useCallback(
    (event) => {
      elementWidth.value = event.nativeEvent.layout.width;
      elementHeight.value = event.nativeEvent.layout.height;
    },
    [elementHeight, elementWidth]
  );

  // When the user set a `at` index, get the index's y & x positions
  const atXPosition = useMemo(
    () =>
      at !== null && at !== undefined
        ? getXPositionForCurve(parsedPath, at)
        : undefined,
    [at, parsedPath]
  );
  const atYPosition = useDerivedValue(() => {
    return atXPosition == null
      ? undefined
      : getYForX(parsedPath, atXPosition) ?? 0;
  }, [atXPosition]);
  const getInitialTranslateXOffset = React.useCallback(
    (elementWidth) => {
      'worklet';

      if (position === 'right') return elementWidth + cursorGutter;
      if (position === 'left') return -cursorGutter;
      return elementWidth / 2;
    },
    [cursorGutter, position]
  );

  /**
   * Helper function to calculate the X translation offset based on position
   * and boundary constraints
   */
  const calculateXTranslateOffset = React.useCallback(
    (params) => {
      'worklet';

      const {
        position,
        x,
        elementWidth,
        width,
        xGutter,
        cursorGutter,
        withHorizontalFloating,
      } = params;
      let translateXOffset = getInitialTranslateXOffset(elementWidth);
      const elementFullWidth = elementWidth + xGutter + cursorGutter;
      if (position === 'right') {
        if (x < elementFullWidth) {
          translateXOffset = withHorizontalFloating
            ? -cursorGutter
            : translateXOffset - elementFullWidth + x;
        }
      } else if (position === 'left') {
        if (x > width - elementFullWidth) {
          translateXOffset = withHorizontalFloating
            ? elementWidth + cursorGutter
            : translateXOffset + (x - (width - elementFullWidth));
        }
      } else {
        // Center position
        if (x < elementWidth / 2 + xGutter) {
          translateXOffset -= elementWidth / 2 + xGutter - x;
        }
        if (x > width - elementWidth / 2 - xGutter) {
          translateXOffset += x - (width - elementWidth / 2 - xGutter);
        }
      }
      return translateXOffset;
    },
    [getInitialTranslateXOffset]
  );

  /**
   * Helper function to calculate the Y translation offset based on position and
   * boundary constraints
   */
  const calculateYTranslateOffset = React.useCallback((params) => {
    'worklet';

    const { position, y, elementHeight, height, yGutter, cursorGutter } =
      params;
    let translateYOffset = 0;
    if (position === 'top') {
      translateYOffset = elementHeight / 2 + cursorGutter;
      if (y - translateYOffset < yGutter) {
        translateYOffset = y - yGutter;
      }
    } else if (position === 'bottom') {
      translateYOffset = -(elementHeight / 2) - cursorGutter / 2;
      if (y - translateYOffset + elementHeight > height - yGutter) {
        translateYOffset = y - (height - yGutter) + elementHeight;
      }
    } else if (position === 'right' || position === 'left') {
      translateYOffset = elementHeight / 2;
    }
    return translateYOffset;
  }, []);
  const animatedCursorStyle = useAnimatedStyle(() => {
    // the tooltip is considered static when the user specified an `at` prop
    const isStatic = atYPosition.value != null;

    // Calculate X position:
    const x = atXPosition ?? currentX.value;
    const translateXOffset = calculateXTranslateOffset({
      position,
      x,
      elementWidth: elementWidth.value,
      width,
      xGutter,
      cursorGutter,
      withHorizontalFloating,
    });
    const translateX = x - translateXOffset;

    // Calculate Y position:
    const y = atYPosition.value ?? currentY.value;
    const translateYOffset = calculateYTranslateOffset({
      position,
      y,
      elementHeight: elementHeight.value,
      height,
      yGutter,
      cursorGutter,
    });

    // Determine final translateY value
    let translateY;
    if (type === 'crosshair' || isStatic) {
      translateY = y - translateYOffset;
    } else {
      translateY =
        position === 'top' ? yGutter : height - elementHeight.value - yGutter;
    }

    // Calculate opacity
    let opacity = isActive.value ? 1 : 0;
    if (isStatic) {
      // Only show static when there is no active cursor
      opacity = withTiming(isActive.value ? 0 : 1);
    }
    return {
      transform: [
        {
          translateX,
        },
        {
          translateY,
        },
      ],
      opacity: opacity,
    };
  }, [
    atXPosition,
    atYPosition.value,
    calculateXTranslateOffset,
    calculateYTranslateOffset,
    currentX.value,
    currentY.value,
    cursorGutter,
    elementHeight.value,
    elementWidth.value,
    height,
    isActive.value,
    position,
    type,
    width,
    withHorizontalFloating,
    xGutter,
    yGutter,
  ]);
  return /*#__PURE__*/ React.createElement(
    Animated.View,
    _extends(
      {
        onLayout: handleLayout,
      },
      props,
      {
        style: [styles.tooltip, animatedCursorStyle, props.style],
      }
    ),
    children ||
      /*#__PURE__*/ React.createElement(
        LineChartPriceText,
        _extends(
          {
            format: format,
            index: at,
            style: [textStyle],
          },
          textProps
        )
      )
  );
}
const styles = StyleSheet.create({
  tooltip: {
    position: 'absolute',
    padding: 4,
    alignSelf: 'flex-start',
  },
});
//# sourceMappingURL=Tooltip.js.map