@rc-component/input-number/es/StepHandler.js

React input-number component

/* eslint-disable react/no-unknown-property */
import raf from "@rc-component/util/es/raf";
import { clsx } from 'clsx';
import * as React from 'react';

/**
 * When click and hold on a button - the speed of auto changing the value.
 */
const STEP_INTERVAL = 200;

/**
 * When click and hold on a button - the delay before auto changing the value.
 */
const STEP_DELAY = 600;
export default function StepHandler({
  prefixCls,
  action,
  children,
  disabled,
  className,
  style,
  onStep
}) {
  // ======================== MISC ========================
  const isUpAction = action === 'up';

  // ======================== Step ========================
  const stepTimeoutRef = React.useRef();
  const frameIds = React.useRef([]);
  const onStopStep = () => {
    clearTimeout(stepTimeoutRef.current);
  };

  // We will interval update step when hold mouse down
  const onStepMouseDown = e => {
    e.preventDefault();
    onStopStep();
    onStep(isUpAction, 'handler');

    // Loop step for interval
    function loopStep() {
      onStep(isUpAction, 'handler');
      stepTimeoutRef.current = setTimeout(loopStep, STEP_INTERVAL);
    }

    // First time press will wait some time to trigger loop step update
    stepTimeoutRef.current = setTimeout(loopStep, STEP_DELAY);
  };
  React.useEffect(() => () => {
    onStopStep();
    frameIds.current.forEach(id => {
      raf.cancel(id);
    });
  }, []);

  // ======================= Render =======================
  const actionClassName = `${prefixCls}-action`;
  const mergedClassName = clsx(actionClassName, `${actionClassName}-${action}`, {
    [`${actionClassName}-${action}-disabled`]: disabled
  }, className);

  // fix: https://github.com/ant-design/ant-design/issues/43088
  // In Safari, When we fire onmousedown and onmouseup events in quick succession,
  // there may be a problem that the onmouseup events are executed first,
  // resulting in a disordered program execution.
  // So, we need to use requestAnimationFrame to ensure that the onmouseup event is executed after the onmousedown event.
  const safeOnStopStep = () => frameIds.current.push(raf(onStopStep));
  return /*#__PURE__*/React.createElement("span", {
    unselectable: "on",
    role: "button",
    onMouseUp: safeOnStopStep,
    onMouseLeave: safeOnStopStep,
    onMouseDown: e => {
      onStepMouseDown(e);
    },
    "aria-label": isUpAction ? 'Increase Value' : 'Decrease Value',
    "aria-disabled": disabled,
    className: mergedClassName,
    style: style
  }, children || /*#__PURE__*/React.createElement("span", {
    unselectable: "on",
    className: `${prefixCls}-action-${action}-inner`
  }));
}