@material-ui/core/es/Select/SelectInput.js

React components that implement Google's Material Design.

import _objectSpread from "@babel/runtime/helpers/objectSpread";
import _extends from "@babel/runtime/helpers/extends";
import _objectWithoutProperties from "@babel/runtime/helpers/objectWithoutProperties";
import React from 'react';
import PropTypes from 'prop-types';
import classNames from 'classnames';
import keycode from 'keycode';
import warning from 'warning';
import Menu from '../Menu/Menu';
import { isFilled } from '../InputBase/utils';
import { setRef } from '../utils/reactHelpers';
/**
 * @ignore - internal component.
 */

class SelectInput extends React.Component {
  constructor(props) {
    super();
    this.ignoreNextBlur = false;

    this.update = ({
      event,
      open
    }) => {
      if (this.isOpenControlled) {
        if (open) {
          this.props.onOpen(event);
        } else {
          this.props.onClose(event);
        }

        return;
      }

      this.setState({
        // Perfom the layout computation outside of the render method.
        menuMinWidth: this.props.autoWidth ? null : this.displayRef.clientWidth,
        open
      });
    };

    this.handleClick = event => {
      // Opening the menu is going to blur the. It will be focused back when closed.
      this.ignoreNextBlur = true;
      this.update({
        open: true,
        event
      });
    };

    this.handleClose = event => {
      this.update({
        open: false,
        event
      });
    };

    this.handleItemClick = child => event => {
      if (!this.props.multiple) {
        this.update({
          open: false,
          event
        });
      }

      const {
        onChange,
        name
      } = this.props;

      if (onChange) {
        let value;

        if (this.props.multiple) {
          value = Array.isArray(this.props.value) ? [...this.props.value] : [];
          const itemIndex = value.indexOf(child.props.value);

          if (itemIndex === -1) {
            value.push(child.props.value);
          } else {
            value.splice(itemIndex, 1);
          }
        } else {
          value = child.props.value;
        }

        event.persist();
        event.target = {
          value,
          name
        };
        onChange(event, child);
      }
    };

    this.handleBlur = event => {
      if (this.ignoreNextBlur === true) {
        // The parent components are relying on the bubbling of the event.
        event.stopPropagation();
        this.ignoreNextBlur = false;
        return;
      }

      if (this.props.onBlur) {
        const {
          value,
          name
        } = this.props;
        event.persist();
        event.target = {
          value,
          name
        };
        this.props.onBlur(event);
      }
    };

    this.handleKeyDown = event => {
      if (this.props.readOnly) {
        return;
      }

      if (['space', 'up', 'down'].indexOf(keycode(event)) !== -1) {
        event.preventDefault(); // Opening the menu is going to blur the. It will be focused back when closed.

        this.ignoreNextBlur = true;
        this.update({
          open: true,
          event
        });
      }
    };

    this.handleDisplayRef = ref => {
      this.displayRef = ref;
    };

    this.handleInputRef = ref => {
      const {
        inputRef
      } = this.props;

      if (!inputRef) {
        return;
      }

      const nodeProxy = {
        node: ref,
        // By pass the native input as we expose a rich object (array).
        value: this.props.value,
        focus: () => {
          this.displayRef.focus();
        }
      };
      setRef(inputRef, nodeProxy);
    };

    this.isOpenControlled = props.open !== undefined;
    this.state = {
      menuMinWidth: null,
      open: false
    };
  }

  componentDidMount() {
    if (this.isOpenControlled && this.props.open) {
      // Focus the display node so the focus is restored on this element once
      // the menu is closed.
      this.displayRef.focus(); // Rerender with the resolve `displayRef` reference.

      this.forceUpdate();
    }

    if (this.props.autoFocus) {
      this.displayRef.focus();
    }
  }

  render() {
    const _this$props = this.props,
          {
      autoWidth,
      children,
      classes,
      className,
      disabled,
      displayEmpty,
      IconComponent,
      inputRef,
      MenuProps = {},
      multiple,
      name,
      onBlur,
      onChange,
      onClose,
      onFocus,
      onOpen,
      open: openProp,
      readOnly,
      renderValue,
      required,
      SelectDisplayProps,
      tabIndex: tabIndexProp,
      type = 'hidden',
      value,
      variant
    } = _this$props,
          other = _objectWithoutProperties(_this$props, ["autoWidth", "children", "classes", "className", "disabled", "displayEmpty", "IconComponent", "inputRef", "MenuProps", "multiple", "name", "onBlur", "onChange", "onClose", "onFocus", "onOpen", "open", "readOnly", "renderValue", "required", "SelectDisplayProps", "tabIndex", "type", "value", "variant"]);

    const open = this.isOpenControlled && this.displayRef ? openProp : this.state.open;
    delete other['aria-invalid'];
    let display;
    let displaySingle = '';
    const displayMultiple = [];
    let computeDisplay = false; // No need to display any value if the field is empty.

    if (isFilled(this.props) || displayEmpty) {
      if (renderValue) {
        display = renderValue(value);
      } else {
        computeDisplay = true;
      }
    }

    const items = React.Children.map(children, child => {
      if (!React.isValidElement(child)) {
        return null;
      }

      process.env.NODE_ENV !== "production" ? warning(child.type !== React.Fragment, ["Material-UI: the Select component doesn't accept a Fragment as a child.", 'Consider providing an array instead.'].join('\n')) : void 0;
      let selected;

      if (multiple) {
        if (!Array.isArray(value)) {
          throw new Error('Material-UI: the `value` property must be an array ' + 'when using the `Select` component with `multiple`.');
        }

        selected = value.indexOf(child.props.value) !== -1;

        if (selected && computeDisplay) {
          displayMultiple.push(child.props.children);
        }
      } else {
        selected = value === child.props.value;

        if (selected && computeDisplay) {
          displaySingle = child.props.children;
        }
      }

      return React.cloneElement(child, {
        onClick: this.handleItemClick(child),
        role: 'option',
        selected,
        value: undefined,
        // The value is most likely not a valid HTML attribute.
        'data-value': child.props.value // Instead, we provide it as a data attribute.

      });
    });

    if (computeDisplay) {
      display = multiple ? displayMultiple.join(', ') : displaySingle;
    } // Avoid performing a layout computation in the render method.


    let menuMinWidth = this.state.menuMinWidth;

    if (!autoWidth && this.isOpenControlled && this.displayRef) {
      menuMinWidth = this.displayRef.clientWidth;
    }

    let tabIndex;

    if (typeof tabIndexProp !== 'undefined') {
      tabIndex = tabIndexProp;
    } else {
      tabIndex = disabled ? null : 0;
    }

    return React.createElement("div", {
      className: classes.root
    }, React.createElement("div", _extends({
      className: classNames(classes.select, classes.selectMenu, {
        [classes.disabled]: disabled,
        [classes.filled]: variant === 'filled',
        [classes.outlined]: variant === 'outlined'
      }, className),
      ref: this.handleDisplayRef,
      "aria-pressed": open ? 'true' : 'false',
      tabIndex: tabIndex,
      role: "button",
      "aria-owns": open ? `menu-${name || ''}` : null,
      "aria-haspopup": "true",
      onKeyDown: this.handleKeyDown,
      onBlur: this.handleBlur,
      onClick: disabled || readOnly ? null : this.handleClick,
      onFocus: onFocus
    }, SelectDisplayProps), display || React.createElement("span", {
      dangerouslySetInnerHTML: {
        __html: '​'
      }
    })), React.createElement("input", _extends({
      value: Array.isArray(value) ? value.join(',') : value,
      name: name,
      ref: this.handleInputRef,
      type: type
    }, other)), React.createElement(IconComponent, {
      className: classes.icon
    }), React.createElement(Menu, _extends({
      id: `menu-${name || ''}`,
      anchorEl: this.displayRef,
      open: open,
      onClose: this.handleClose
    }, MenuProps, {
      MenuListProps: _objectSpread({
        role: 'listbox'
      }, MenuProps.MenuListProps),
      PaperProps: _objectSpread({}, MenuProps.PaperProps, {
        style: _objectSpread({
          minWidth: menuMinWidth
        }, MenuProps.PaperProps != null ? MenuProps.PaperProps.style : null)
      })
    }), items));
  }

}

SelectInput.propTypes = process.env.NODE_ENV !== "production" ? {
  /**
   * @ignore
   */
  autoFocus: PropTypes.bool,

  /**
   * If true, the width of the popover will automatically be set according to the items inside the
   * menu, otherwise it will be at least the width of the select input.
   */
  autoWidth: PropTypes.bool,

  /**
   * The option elements to populate the select with.
   * Can be some `<MenuItem>` elements.
   */
  children: PropTypes.node,

  /**
   * Override or extend the styles applied to the component.
   * See [CSS API](#css-api) below for more details.
   */
  classes: PropTypes.object.isRequired,

  /**
   * The CSS class name of the select element.
   */
  className: PropTypes.string,

  /**
   * If `true`, the select will be disabled.
   */
  disabled: PropTypes.bool,

  /**
   * If `true`, the selected item is displayed even if its value is empty.
   */
  displayEmpty: PropTypes.bool,

  /**
   * The icon that displays the arrow.
   */
  IconComponent: PropTypes.oneOfType([PropTypes.string, PropTypes.func, PropTypes.object]),

  /**
   * Use that property to pass a ref callback to the native select element.
   */
  inputRef: PropTypes.oneOfType([PropTypes.func, PropTypes.object]),

  /**
   * Properties applied to the [`Menu`](/api/menu/) element.
   */
  MenuProps: PropTypes.object,

  /**
   * If true, `value` must be an array and the menu will support multiple selections.
   */
  multiple: PropTypes.bool,

  /**
   * Name attribute of the `select` or hidden `input` element.
   */
  name: PropTypes.string,

  /**
   * @ignore
   */
  onBlur: PropTypes.func,

  /**
   * Callback function fired when a menu item is selected.
   *
   * @param {object} event The event source of the callback.
   * You can pull out the new value by accessing `event.target.value`.
   * @param {object} [child] The react element that was selected.
   */
  onChange: PropTypes.func,

  /**
   * Callback fired when the component requests to be closed.
   * Use in controlled mode (see open).
   *
   * @param {object} event The event source of the callback
   */
  onClose: PropTypes.func,

  /**
   * @ignore
   */
  onFocus: PropTypes.func,

  /**
   * Callback fired when the component requests to be opened.
   * Use in controlled mode (see open).
   *
   * @param {object} event The event source of the callback
   */
  onOpen: PropTypes.func,

  /**
   * Control `select` open state.
   */
  open: PropTypes.bool,

  /**
   * @ignore
   */
  readOnly: PropTypes.bool,

  /**
   * Render the selected value.
   *
   * @param {*} value The `value` provided to the component.
   * @returns {ReactElement}
   */
  renderValue: PropTypes.func,

  /**
   * @ignore
   */
  required: PropTypes.bool,

  /**
   * Properties applied to the clickable div element.
   */
  SelectDisplayProps: PropTypes.object,

  /**
   * @ignore
   */
  tabIndex: PropTypes.oneOfType([PropTypes.number, PropTypes.string]),

  /**
   * @ignore
   */
  type: PropTypes.string,

  /**
   * The input value.
   */
  value: PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.bool, PropTypes.arrayOf(PropTypes.oneOfType([PropTypes.string, PropTypes.number, PropTypes.bool]))]).isRequired,

  /**
   * The variant to use.
   */
  variant: PropTypes.oneOf(['standard', 'outlined', 'filled'])
} : {};
export default SelectInput;