ndla-ui/es/Tooltip/Tooltip.js

UI component library for NDLA.

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

/**
 * Copyright (c) 2016-present, NDLA.
 *
 * This source code is licensed under the GPLv3 license found in the
 * LICENSE file in the root directory of this source tree.
 *
 */

import React, { Component } from 'react';
import PropTypes from 'prop-types';
import BEMHelper from 'react-bem-helper';
import { isMobile, isIE } from 'react-device-detect';

import { Fade } from '../Animation';

var classes = new BEMHelper({
  name: 'tooltip',
  prefix: 'c-'
});

var Tooltip = function (_Component) {
  _inherits(Tooltip, _Component);

  function Tooltip(props) {
    _classCallCheck(this, Tooltip);

    var _this = _possibleConstructorReturn(this, (Tooltip.__proto__ || Object.getPrototypeOf(Tooltip)).call(this, props));

    _this.state = {
      showTooltip: false
    };
    _this.handleShowTooltip = _this.handleShowTooltip.bind(_this);
    _this.handleHideTooltip = _this.handleHideTooltip.bind(_this);
    _this.handleKeyPress = _this.handleKeyPress.bind(_this);
    _this.contentRef = React.createRef();
    _this.tooltipRef = React.createRef();
    _this.widthRef = 0;
    _this.heightRef = 0;
    _this.leftRef = 0;
    _this.tooltipRefWidth = props.tooltip ? props.tooltip.length * 5 : 0; // Estimate incase user only uses keyboard navigation.
    _this.currentStyles = {};
    return _this;
  }

  _createClass(Tooltip, [{
    key: 'getPosition',
    value: function getPosition() {
      if (this.state.showTooltip) {
        this.currentStyles = {};
        this.widthRef = this.contentRef.current.offsetWidth;
        this.heightRef = this.contentRef.current.offsetHeight;
        var elementRect = this.contentRef.current.getBoundingClientRect();
        this.leftRef = elementRect.left;
        var tooltipWidth = this.tooltipRef.current ? this.tooltipRef.current.offsetWidth : this.tooltipRefWidth;

        this.tooltipRefWidth = tooltipWidth;

        if (isIE) {
          // IE is bad with transform % + px..
          this.currentStyles.left = '-' + (this.tooltipRef.current.offsetWidth - this.widthRef) / 2 + 'px';
          this.currentStyles.top = '-' + (this.tooltipRef.current.offsetHeight + 10) + 'px';
        } else if (this.props.align === 'top' || this.props.align === 'bottom' || this.props.align === 'left' && this.leftRef - tooltipWidth < 20 || this.props.align === 'right' && this.leftRef + this.widthRef + tooltipWidth > window.innerWidth - 40) {
          var centeredLeft = this.leftRef + this.widthRef / 2;
          var moveHorizontal = Math.max(centeredLeft + tooltipWidth / 2 + 20 - window.innerWidth, 0);
          if (moveHorizontal === 0) {
            moveHorizontal = Math.min(-(tooltipWidth / 2 - centeredLeft + 20), 0);
          }
          if (this.props.align === 'bottom') {
            this.currentStyles.transform = 'translate(calc(-50% + ' + (this.widthRef / 2 - moveHorizontal) + 'px), calc(' + this.heightRef + 'px + 0.25rem))';
          } else {
            this.currentStyles.transform = 'translate(calc(-50% + ' + (this.widthRef / 2 - moveHorizontal) + 'px), calc(-100% - 0.25rem))';
          }
        } else if (this.props.align === 'left') {
          this.currentStyles.transform = 'translate(calc(-100% - 0.25rem), calc(-50% + ' + this.heightRef / 2 + 'px))';
        } else {
          this.currentStyles.transform = 'translate(calc(' + this.widthRef + 'px + 0.25rem), calc(-50% + ' + this.heightRef / 2 + 'px))';
        }
      }
      return this.currentStyles;
    }
  }, {
    key: 'handleShowTooltip',
    value: function handleShowTooltip() {
      this.setState({ showTooltip: !this.props.disabled });
    }
  }, {
    key: 'handleHideTooltip',
    value: function handleHideTooltip() {
      this.setState({ showTooltip: false });
    }
  }, {
    key: 'handleKeyPress',
    value: function handleKeyPress(e) {
      if (e.key === 'Enter') {
        try {
          this.contentRef.current.querySelectorAll('[type="button"], a')[0].click();
        } catch (err) {
          console.log('error', err); // eslint-disable-line no-console
        }
      }
    }
  }, {
    key: 'render',
    value: function render() {
      // If phone ignore all tooltips //
      if (isMobile) {
        return React.createElement(
          'div',
          {
            className: classes('').className + ' ' + this.props.tooltipContainerClass },
          React.createElement(
            'span',
            { className: 'c-tooltip__content ' + this.props.className },
            this.props.children
          )
        );
      }

      return React.createElement(
        'div',
        {
          className: classes('').className + ' ' + this.props.tooltipContainerClass },
        React.createElement(
          Fade,
          { 'in': this.state.showTooltip, delay: this.props.delay },
          React.createElement(
            'span',
            _extends({
              role: 'tooltip'
            }, classes('tooltip'), {
              style: this.getPosition(),
              ref: this.tooltipRef }),
            this.props.tooltip
          )
        ),
        React.createElement(
          'span',
          {
            role: 'button',
            tabIndex: 0,
            'aria-label': this.props.tooltip,
            ref: this.contentRef,
            onMouseEnter: this.handleShowTooltip,
            onMouseOut: this.handleHideTooltip,
            onMouseMove: this.handleShowTooltip,
            onFocus: this.handleShowTooltip,
            onKeyPress: this.handleKeyPress,
            onBlur: this.handleHideTooltip,
            className: 'c-tooltip__content ' + this.props.className },
          this.props.children
        )
      );
    }
  }]);

  return Tooltip;
}(Component);

Tooltip.propTypes = {
  children: PropTypes.node.isRequired,
  tooltip: PropTypes.string.isRequired,
  delay: PropTypes.number,
  disabled: PropTypes.bool,
  align: PropTypes.oneOf(['left', 'right', 'top', 'bottom']),
  className: PropTypes.string,
  tooltipContainerClass: PropTypes.string
};

Tooltip.defaultProps = {
  align: 'top',
  disabled: false,
  delay: 0,
  className: '',
  tooltipContainerClass: ''
};

export default Tooltip;