ant-design/components/slider/index.tsx

import * as React from 'react';
import RcSlider, { Range as RcRange, Handle as RcHandle } from 'rc-slider';
import classNames from 'classnames';
import { TooltipPlacement } from '../tooltip';
import SliderTooltip from './SliderTooltip';
import { ConfigContext } from '../config-provider';

export interface SliderMarks {
  [key: number]:
    | React.ReactNode
    | {
        style: React.CSSProperties;
        label: React.ReactNode;
      };
}

interface HandleGeneratorInfo {
  value?: number;
  dragging?: boolean;
  index: number;
}

export type HandleGeneratorFn = (config: {
  tooltipPrefixCls?: string;
  prefixCls?: string;
  info: HandleGeneratorInfo;
}) => React.ReactElement;

export interface SliderBaseProps {
  prefixCls?: string;
  tooltipPrefixCls?: string;
  reverse?: boolean;
  min?: number;
  max?: number;
  step?: null | number;
  marks?: SliderMarks;
  dots?: boolean;
  included?: boolean;
  disabled?: boolean;
  vertical?: boolean;
  tipFormatter?: null | ((value?: number) => React.ReactNode);
  className?: string;
  id?: string;
  style?: React.CSSProperties;
  tooltipVisible?: boolean;
  tooltipPlacement?: TooltipPlacement;
  getTooltipPopupContainer?: (triggerNode: HTMLElement) => HTMLElement;
  autoFocus?: boolean;
}

export interface SliderSingleProps extends SliderBaseProps {
  range?: false;
  value?: number;
  defaultValue?: number;
  onChange?: (value: number) => void;
  onAfterChange?: (value: number) => void;
  handleStyle?: React.CSSProperties;
  trackStyle?: React.CSSProperties;
}

export interface SliderRangeProps extends SliderBaseProps {
  range: true | SliderRange;
  value?: [number, number];
  defaultValue?: [number, number];
  onChange?: (value: [number, number]) => void;
  onAfterChange?: (value: [number, number]) => void;
  handleStyle?: React.CSSProperties[];
  trackStyle?: React.CSSProperties[];
}

interface SliderRange {
  draggableTrack?: boolean;
}

export type Visibles = { [index: number]: boolean };

const Slider = React.forwardRef<unknown, SliderSingleProps | SliderRangeProps>(
  (props, ref: any) => {
    const { getPrefixCls, direction, getPopupContainer } = React.useContext(ConfigContext);
    const [visibles, setVisibles] = React.useState<Visibles>({});

    const toggleTooltipVisible = (index: number, visible: boolean) => {
      setVisibles((prev: Visibles) => ({ ...prev, [index]: visible }));
    };

    const getTooltipPlacement = (tooltipPlacement?: TooltipPlacement, vertical?: boolean) => {
      if (tooltipPlacement) {
        return tooltipPlacement;
      }
      if (!vertical) {
        return 'top';
      }
      return direction === 'rtl' ? 'left' : 'right';
    };

    const handleWithTooltip: HandleGeneratorFn = ({
      tooltipPrefixCls,
      prefixCls,
      info: { value, dragging, index, ...restProps },
    }) => {
      const {
        tipFormatter,
        tooltipVisible,
        tooltipPlacement,
        getTooltipPopupContainer,
        vertical,
      } = props;
      const isTipFormatter = tipFormatter ? visibles[index] || dragging : false;
      const visible = tooltipVisible || (tooltipVisible === undefined && isTipFormatter);
      return (
        <SliderTooltip
          prefixCls={tooltipPrefixCls}
          title={tipFormatter ? tipFormatter(value) : ''}
          visible={visible}
          placement={getTooltipPlacement(tooltipPlacement, vertical)}
          transitionName="zoom-down"
          key={index}
          overlayClassName={`${prefixCls}-tooltip`}
          getPopupContainer={getTooltipPopupContainer || getPopupContainer || (() => document.body)}
        >
          <RcHandle
            {...restProps}
            value={value}
            onMouseEnter={() => toggleTooltipVisible(index, true)}
            onMouseLeave={() => toggleTooltipVisible(index, false)}
          />
        </SliderTooltip>
      );
    };

    const {
      prefixCls: customizePrefixCls,
      tooltipPrefixCls: customizeTooltipPrefixCls,
      range,
      className,
      ...restProps
    } = props;
    const prefixCls = getPrefixCls('slider', customizePrefixCls);
    const tooltipPrefixCls = getPrefixCls('tooltip', customizeTooltipPrefixCls);
    const cls = classNames(className, {
      [`${prefixCls}-rtl`]: direction === 'rtl',
    });

    // make reverse default on rtl direction
    if (direction === 'rtl' && !restProps.vertical) {
      restProps.reverse = !restProps.reverse;
    }
  
    // extrack draggableTrack from range={{ ... }}
    let draggableTrack: boolean | undefined;
    if (typeof range === 'object') {
      draggableTrack = range.draggableTrack;
    }
  
    if (range) {
      return (
        <RcRange
          {...(restProps as SliderRangeProps)}
          step={restProps.step!}
          draggableTrack={draggableTrack}
          className={cls}
          ref={ref}
          handle={(info: HandleGeneratorInfo) =>
            handleWithTooltip({
              tooltipPrefixCls,
              prefixCls,
              info,
            })
          }
          prefixCls={prefixCls}
        />
      );
    }
    return (
      <RcSlider
        {...(restProps as SliderSingleProps)}
        step={restProps.step!}
        className={cls}
        ref={ref}
        handle={(info: HandleGeneratorInfo) =>
          handleWithTooltip({
            tooltipPrefixCls,
            prefixCls,
            info,
          })
        }
        prefixCls={prefixCls}
      />
    );
  },
);

Slider.displayName = 'Slider';

Slider.defaultProps = {
  tipFormatter(value: number) {
    return typeof value === 'number' ? value.toString() : '';
  },
};

export default Slider;