zrmc/components/select.js

ZRMC is an ES7 React wrapper for Material Components Web.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});

var _typeof2 = require("babel-runtime/helpers/typeof");

var _typeof3 = _interopRequireDefault(_typeof2);

var _extends2 = require("babel-runtime/helpers/extends");

var _extends3 = _interopRequireDefault(_extends2);

var _objectWithoutProperties2 = require("babel-runtime/helpers/objectWithoutProperties");

var _objectWithoutProperties3 = _interopRequireDefault(_objectWithoutProperties2);

var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");

var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);

var _createClass2 = require("babel-runtime/helpers/createClass");

var _createClass3 = _interopRequireDefault(_createClass2);

var _possibleConstructorReturn2 = require("babel-runtime/helpers/possibleConstructorReturn");

var _possibleConstructorReturn3 = _interopRequireDefault(_possibleConstructorReturn2);

var _inherits2 = require("babel-runtime/helpers/inherits");

var _inherits3 = _interopRequireDefault(_inherits2);

var _react = require("react");

var _react2 = _interopRequireDefault(_react);

var _propTypes = require("prop-types");

var _propTypes2 = _interopRequireDefault(_propTypes);

var _ = require("../");

var _2 = _interopRequireDefault(_);

var _menu = require("../menu/menu");

var _menu2 = _interopRequireDefault(_menu);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * mdc-select
 *
 * See:
 * https://material.io/develop/web/components/input-controls/select-menus/
 *
 *
 */

/**
 * Copyright (c) 2015-present, CWB SAS
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
var MDC_SELECT = "mdc-select";

var Select = function (_Component) {
  (0, _inherits3.default)(Select, _Component);

  function Select(props) {
    (0, _classCallCheck3.default)(this, Select);

    var _this = (0, _possibleConstructorReturn3.default)(this, (Select.__proto__ || Object.getPrototypeOf(Select)).call(this, props));

    _this.onBlur = function () {
      _this.setState({ focused: false });
    };

    _this.onFocus = function () {
      _this.setState({ focused: true });
    };

    _this.onSelect = function (selectedItem, selectedIndex) {
      _this.setState({
        selectedIndex: selectedIndex,
        selectedDisplayValue: selectedItem.props.children
      });

      if (_this.props.onSelected) {
        // We pass the value of the selected item to the parent.
        var selectedValue = selectedItem.props.value || selectedItem.props.children;

        _this.props.onSelected(selectedValue, selectedIndex);
      }
    };

    _this.onClickOutsideHandler = function (e) {
      var open = _this.state.open;

      if (open && (!_this.anchorRef || !_this.anchorRef.contains(e.target)) && (!_this.menuRef || !_this.menuRef.innerRef || !_this.menuRef.innerRef.contains(e.target))) {
        e.preventDefault();
        _this.onClose();
      }
    };

    _this.onClickHandler = function (e) {
      e.preventDefault();
      if (_this.state.open) {
        _this.onClose();
      } else {
        _this.setState({ open: true });
        _2.default.lockScroll();
      }
    };

    _this.onClose = function () {
      _this.setState({ open: false }, function () {
        _2.default.unlockScroll();
        if (_this.focusRef) {
          _this.focusRef.focus();
        }
      });
    };

    _this.setRef = function (c) {
      _this.anchorRef = c;
    };

    var selectedChild = _react.Children.toArray(props.children).find(function (child, index) {
      return index === props.selectedIndex;
    });

    _this.state = {
      open: false,
      focused: false,
      selectedDisplayValue: selectedChild ? selectedChild.props.children : null,
      selectedIndex: props.selectedIndex
    };

    _this.ctx = null;
    return _this;
  }

  (0, _createClass3.default)(Select, [{
    key: "componentDidMount",
    value: function componentDidMount() {
      _2.default.enableClickOutside(this.onClickOutsideHandler);
      this.updateContent();
    }
  }, {
    key: "componentDidUpdate",
    value: function componentDidUpdate() {
      this.updateContent();
    }
  }, {
    key: "componentWillUnmount",
    value: function componentWillUnmount() {
      _2.default.disableClickOutside(this.onClickOutsideHandler);
      this.ctx = null;
    }
  }, {
    key: "calculateWidth",
    value: function calculateWidth() {
      var _this2 = this;

      if (!this.ctx) {
        this.ctx = document.createElement("canvas").getContext("2d");
      }
      this.ctx.font = _2.default.getFontStyle(this.anchorRef);
      var letterSpacing = parseFloat(_2.default.getComputedStyleValue(this.anchorRef, "letter-spacing"));
      var surfacePaddingRight = parseInt(_2.default.getComputedStyleValue(this.anchorRef, "padding-right"), 10);
      var surfacePaddingLeft = parseInt(_2.default.getComputedStyleValue(this.anchorRef, "padding-left"), 10);
      var selectBoxAddedPadding = surfacePaddingRight + surfacePaddingLeft;
      var maxTextLength = 0;
      _react.Children.forEach(this.props.children, function (child) {
        if (child.props.children) {
          var txt = child.props.children.trim();

          var _ctx$measureText = _this2.ctx.measureText(txt),
              width = _ctx$measureText.width;

          var addedSpace = letterSpacing * txt.length;
          maxTextLength = Math.max(maxTextLength, Math.ceil(width + addedSpace + selectBoxAddedPadding));
        }
      });
      return maxTextLength;
    }
  }, {
    key: "updateContent",
    value: function updateContent() {
      if (this.anchorRef && this.menuRef) {
        var w = this.calculateWidth();
        var style = void 0;
        if (!(this.props.style && this.props.style.width)) {
          style = "width: " + w + "px;";
          this.anchorRef.style = style;
        }
        if (this.state.open) {
          var _window = window,
              innerHeight = _window.innerHeight;

          var _anchorRef$getBoundin = this.anchorRef.getBoundingClientRect(),
              top = _anchorRef$getBoundin.top;

          var menuHeight = this.menuRef.innerRef.offsetHeight;
          var itemOffsetTop = 0;
          if (this.state.selectedIndex > -1 && this.menuRef.selectedRef && this.menuRef.selectedRef.innerRef) {
            itemOffsetTop = this.menuRef.selectedRef.innerRef.offsetTop;
          }

          var adjustedLeft = 0;
          var adjustedTop = 0 - itemOffsetTop;
          if (top < itemOffsetTop) {
            adjustedTop = -top;
          } else if (top + menuHeight > innerHeight) {
            adjustedTop = Math.max(0, innerHeight - menuHeight) - top;
          }
          style = "left: " + adjustedLeft + "px; top: " + adjustedTop + "px; transform-origin: center " + itemOffsetTop + "px;";
          this.menuRef.innerRef.style = style;
        }
      }
    }
  }, {
    key: "render",
    value: function render() {
      var _this3 = this;

      var _props = this.props,
          children = _props.children,
          disabled = _props.disabled,
          label = _props.label,
          props = (0, _objectWithoutProperties3.default)(_props, ["children", "disabled", "label"]);
      var _state = this.state,
          open = _state.open,
          focused = _state.focused,
          selectedIndex = _state.selectedIndex,
          selectedDisplayValue = _state.selectedDisplayValue;


      var classes = MDC_SELECT;
      var p = {};

      var tabIndex = "0";
      if (disabled) {
        p["aria-disabled"] = true;
        tabIndex = "-1";
      }

      var lc = "mdc-floating-label";
      if (selectedDisplayValue) {
        lc += " mdc-floating-label--float-above";
      } else {
        lc += " zrmc-floating-label";
      }

      var bc = "mdc-line-ripple";
      if (focused) {
        bc += " mdc-line-ripple--active";
      }

      /* eslint-disable jsx-a11y/no-noninteractive-tabindex */
      var element = _react2.default.createElement(
        "div",
        (0, _extends3.default)({
          className: classes,
          "aria-hidden": true,
          role: "listbox",
          onKeyUp: function onKeyUp() {},
          onClick: this.onClickHandler,
          ref: this.setRef
        }, p),
        _react2.default.createElement(
          "div",
          {
            className: "mdc-select__native-control",
            tabIndex: tabIndex,
            ref: function ref(c) {
              _this3.focusRef = c;
            }
          },
          _react2.default.createElement(
            "div",
            { className: lc },
            label
          ),
          _react2.default.createElement(
            "div",
            { className: "mdc-select__selected-text" },
            selectedDisplayValue
          ),
          _react2.default.createElement("div", { className: bc })
        ),
        _react2.default.createElement(
          _menu2.default,
          {
            open: open,
            focusedIndex: selectedIndex,
            className: "mdc-select__menu",
            ref: function ref(c) {
              _this3.menuRef = c;
            },
            onSelected: this.onSelect,
            onClose: this.onClose
          },
          _react.Children.map(children, function (child) {
            return _react2.default.cloneElement(child, (0, _extends3.default)({}, child.props, {
              role: "option"
            }));
          })
        )
      );

      /* eslint-enable jsx-a11y/no-noninteractive-tabindex */
      return _2.default.render(element, props);
    }
  }]);
  return Select;
}(_react.Component);

Select.defaultProps = {
  mdcElement: MDC_SELECT,
  disabled: false,
  label: null,
  onSelected: null,
  selectedIndex: -1,
  style: {}
};

var propTypeForSelectChildren = function propTypeForSelectChildren(componentName, child) {
  var displayName = void 0;
  if (child.type) {
    displayName = child.type.displayName || child.type.name || child.type;
  }

  displayName = displayName || (typeof child === "undefined" ? "undefined" : (0, _typeof3.default)(child));

  if (!/MenuItem/.test(displayName)) {
    return new Error("Invalid child '" + displayName + "' supplied to " + componentName + ".");
  }

  return null;
};

Select.propTypes = {
  children: _propTypes2.default.oneOfType([function (props, propName, componentName) {
    return propTypeForSelectChildren(componentName, props[propName]);
  }, _propTypes2.default.arrayOf(function (propValue, key, componentName) {
    return propTypeForSelectChildren(componentName, propValue[key]);
  })]).isRequired,
  mdcElement: _propTypes2.default.string,
  disabled: _propTypes2.default.bool,
  label: _propTypes2.default.string,
  style: _propTypes2.default.shape({ width: _propTypes2.default.string }),
  onSelected: _propTypes2.default.func,
  selectedIndex: _propTypes2.default.number
};

exports.default = Select;