@bigfishtv/cockpit/es/components/container/MinimumHeight.js

var _class, _temp2;

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; }

import React, { Component } from 'react';
import PropTypes from 'prop-types';

/**
 * This component uses the ResizeObserver API to
 * detect when its size changes (due to children)
 * and ensures it never shrinks below the tallest
 * content height. This is helpful to prevent
 * visual jerkiness due to content height shrinking
 * and forcing the browser to "scroll up".
 *
 * Can be used as a normal component which will
 * render a div of its own.
 *
 * <MinimumHeight>
 *    <Child />
 *    <Child />
 * </MinimumHeight>
 *
 * Alternative usage is to use a function as a child.
 *
 * <MinimumHeight>
 *   {(forwardRef, minHeight) => (
 *     <main ref={forwardRef} style={{ minHeight }}>
 *       <Child />
 *       <Child />
 *     </main>
 *   )}
 * </MinimumHeight>
 */

var MinimumHeight = (_temp2 = _class = function (_Component) {
	_inherits(MinimumHeight, _Component);

	function MinimumHeight() {
		var _temp, _this, _ret;

		_classCallCheck(this, MinimumHeight);

		for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
			args[_key] = arguments[_key];
		}

		return _ret = (_temp = (_this = _possibleConstructorReturn(this, _Component.call.apply(_Component, [this].concat(args))), _this), _this.state = {
			minHeight: _this.props.minHeight
		}, _this.registerElement = function (el) {
			if (!el && _this.el && _this.ro) {
				_this.ro.unobserve(_this.el);
			}

			_this.el = el;

			if (_this.el && !_this.ro) {
				_this.ro = new window.ResizeObserver(function (entries) {
					var height = entries[0].contentRect.height;
					if (height > _this.state.minHeight) {
						_this.setState({ minHeight: height });
					}
				});
				_this.ro.observe(_this.el);
			}
		}, _temp), _possibleConstructorReturn(_this, _ret);
	}

	MinimumHeight.prototype.componentWillUnmount = function componentWillUnmount() {
		if (this.ro && this.el) {
			this.ro.unobserve(this.el);
		}
	};

	MinimumHeight.prototype.render = function render() {
		if (typeof this.props.children === 'function') {
			return this.props.children(this.registerElement, this.state.minHeight);
		} else {
			return React.createElement(
				'div',
				{ ref: this.registerElement, style: { minHeight: this.state.minHeight } },
				this.props.children
			);
		}
	};

	return MinimumHeight;
}(Component), _class.propTypes = {
	minHeight: PropTypes.number
}, _class.defaultProps = {
	minHeight: 0
}, _temp2);
export { MinimumHeight as default };