@mui/x-charts/node/ChartsTooltip/utils.js

The community edition of the Charts components (MUI X).

"use strict";

var _interopRequireWildcard = require("@babel/runtime/helpers/interopRequireWildcard").default;
var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault").default;
Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.generateVirtualElement = generateVirtualElement;
exports.getTooltipHasData = getTooltipHasData;
exports.useMouseTracker = useMouseTracker;
exports.utcFormatter = utcFormatter;
var _extends2 = _interopRequireDefault(require("@babel/runtime/helpers/extends"));
var React = _interopRequireWildcard(require("react"));
var _hooks = require("../hooks");
function generateVirtualElement(mousePosition) {
  if (mousePosition === null) {
    return {
      getBoundingClientRect: () => ({
        width: 0,
        height: 0,
        x: 0,
        y: 0,
        top: 0,
        right: 0,
        bottom: 0,
        left: 0,
        toJSON: () => ''
      })
    };
  }
  const {
    x,
    y
  } = mousePosition;
  const boundingBox = {
    width: 0,
    height: 0,
    x,
    y,
    top: y,
    right: x,
    bottom: y,
    left: x
  };
  return {
    getBoundingClientRect: () => (0, _extends2.default)({}, boundingBox, {
      toJSON: () => JSON.stringify(boundingBox)
    })
  };
}
function useMouseTracker() {
  const svgRef = (0, _hooks.useSvgRef)();

  // Use a ref to avoid rerendering on every mousemove event.
  const [mousePosition, setMousePosition] = React.useState(null);
  React.useEffect(() => {
    const element = svgRef.current;
    if (element === null) {
      return () => {};
    }
    const handleOut = event => {
      if (event.pointerType !== 'mouse') {
        setMousePosition(null);
      }
    };
    const handleMove = event => {
      setMousePosition({
        x: event.clientX,
        y: event.clientY,
        height: event.height,
        pointerType: event.pointerType
      });
    };
    element.addEventListener('pointerdown', handleMove);
    element.addEventListener('pointermove', handleMove);
    element.addEventListener('pointerup', handleOut);
    return () => {
      element.removeEventListener('pointerdown', handleMove);
      element.removeEventListener('pointermove', handleMove);
      element.removeEventListener('pointerup', handleOut);
    };
  }, [svgRef]);
  return mousePosition;
}
function getTooltipHasData(trigger, displayedData) {
  if (trigger === 'item') {
    return displayedData !== null;
  }
  const hasAxisXData = displayedData.x !== null;
  const hasAxisYData = displayedData.y !== null;
  return hasAxisXData || hasAxisYData;
}
function utcFormatter(v) {
  if (v instanceof Date) {
    return v.toUTCString();
  }
  return v.toLocaleString();
}