text: import _extends from 'babel-runtime/helpers/extends';
  import _objectWithoutProperties from 'babel-runtime/helpers/objectWithoutProperties';
  // @inheritedComponent Modal
  
  import React from 'react';
  import PropTypes from 'prop-types';
  import ReactDOM from 'react-dom';
  import warning from 'warning';
  import contains from 'dom-helpers/query/contains';
  import ownerDocument from 'dom-helpers/ownerDocument';
  import ownerWindow from 'dom-helpers/ownerWindow';
  import debounce from 'lodash/debounce';
  import EventListener from 'react-event-listener';
  import withStyles from '../styles/withStyles';
  import Modal from '../Modal';
  import Grow from '../transitions/Grow';
  import Paper from '../Paper';
  
  function getOffsetTop(rect, vertical) {
    let offset = 0;
  
    if (typeof vertical === 'number') {
      offset = vertical;
    } else if (vertical === 'center') {
      offset = rect.height / 2;
    } else if (vertical === 'bottom') {
      offset = rect.height;
    }
  
    return offset;
  }
  
  function getOffsetLeft(rect, horizontal) {
    let offset = 0;
  
    if (typeof horizontal === 'number') {
      offset = horizontal;
    } else if (horizontal === 'center') {
      offset = rect.width / 2;
    } else if (horizontal === 'right') {
      offset = rect.width;
    }
  
    return offset;
  }
  
  function getTransformOriginValue(transformOrigin) {
    return [transformOrigin.horizontal, transformOrigin.vertical].map(n => {
      return typeof n === 'number' ? `${n}px` : n;
    }).join(' ');
  }
  
  // Sum the scrollTop between two elements.
  function getScrollParent(parent, child) {
    let element = child;
    let scrollTop = 0;
  
    while (element && element !== parent) {
      element = element.parentNode;
      scrollTop += element.scrollTop;
    }
    return scrollTop;
  }
  
  export const styles = {
    paper: {
      position: 'absolute',
      overflowY: 'auto',
      overflowX: 'hidden',
      // So we see the popover when it's empty.
      // It's most likely on issue on userland.
      minWidth: 16,
      minHeight: 16,
      maxWidth: 'calc(100vw - 32px)',
      maxHeight: 'calc(100vh - 32px)',
      '&:focus': {
        outline: 'none'
      }
    }
  };
  
  class Popover extends React.Component {
    constructor(...args) {
      var _temp;
  
      return _temp = super(...args), this.componentWillUnmount = () => {
        this.handleResize.cancel();
      }, this.setPositioningStyles = element => {
        if (element && element.style) {
          const positioning = this.getPositioningStyle(element);
          element.style.top = positioning.top;
          element.style.left = positioning.left;
          element.style.transformOrigin = positioning.transformOrigin;
        }
      }, this.getPositioningStyle = element => {
        const { anchorEl, marginThreshold } = this.props;
  
        // Check if the parent has requested anchoring on an inner content node
        const contentAnchorOffset = this.getContentAnchorOffset(element);
        // Get the offset of of the anchoring element
        const anchorOffset = this.getAnchorOffset(contentAnchorOffset);
  
        const elemRect = {
          width: element.clientWidth,
          height: element.clientHeight
        };
        // Get the transform origin point on the element itself
        const transformOrigin = this.getTransformOrigin(elemRect, contentAnchorOffset);
  
        // Calculate element positioning
        let top = anchorOffset.top - transformOrigin.vertical;
        let left = anchorOffset.left - transformOrigin.horizontal;
        const bottom = top + elemRect.height;
        const right = left + elemRect.width;
  
        // Use the parent window of the anchorEl if provided
        const containerWindow = ownerWindow(anchorEl);
  
        // Window thresholds taking required margin into account
        const heightThreshold = containerWindow.innerHeight - marginThreshold;
        const widthThreshold = containerWindow.innerWidth - marginThreshold;
  
        // Check if the vertical axis needs shifting
        if (top < marginThreshold) {
          const diff = top - marginThreshold;
          top -= diff;
          transformOrigin.vertical += diff;
        } else if (bottom > heightThreshold) {
          const diff = bottom - heightThreshold;
          top -= diff;
          transformOrigin.vertical += diff;
        }
  
        process.env.NODE_ENV !== "production" ? warning(elemRect.height < heightThreshold || !elemRect.height || !heightThreshold, ['Material-UI: the popover component is too tall.', `Some part of it can not be seen on the screen (${elemRect.height - heightThreshold}px).`, 'Please consider adding a `max-height` to improve the user-experience.'].join('\n')) : void 0;
  
        // Check if the horizontal axis needs shifting
        if (left < marginThreshold) {
          const diff = left - marginThreshold;
          left -= diff;
          transformOrigin.horizontal += diff;
        } else if (right > widthThreshold) {
          const diff = right - widthThreshold;
          left -= diff;
          transformOrigin.horizontal += diff;
        }
  
        return {
          top: `${top}px`,
          left: `${left}px`,
          transformOrigin: getTransformOriginValue(transformOrigin)
        };
      }, this.transitionEl = undefined, this.handleGetOffsetTop = getOffsetTop, this.handleGetOffsetLeft = getOffsetLeft, this.handleEnter = element => {
        if (this.props.onEnter) {
          this.props.onEnter(element);
        }
  
        this.setPositioningStyles(element);
      }, this.handleResize = debounce(() => {
        const element = ReactDOM.findDOMNode(this.transitionEl);
        this.setPositioningStyles(element);
      }, 166), _temp;
    }
  
    componentDidMount() {
      if (this.props.action) {
        this.props.action({
          updatePosition: this.handleResize
        });
      }
    }
  
    // Returns the top/left offset of the position
    // to attach to on the anchor element (or body if none is provided)
    getAnchorOffset(contentAnchorOffset) {
      const { anchorEl, anchorOrigin, anchorReference, anchorPosition } = this.props;
  
      if (anchorReference === 'anchorPosition') {
        return anchorPosition;
      }
  
      const anchorElement = anchorEl || document.body;
      const anchorRect = anchorElement.getBoundingClientRect();
      const anchorVertical = contentAnchorOffset === 0 ? anchorOrigin.vertical : 'center';
  
      return {
        top: anchorRect.top + this.handleGetOffsetTop(anchorRect, anchorVertical),
        left: anchorRect.left + this.handleGetOffsetLeft(anchorRect, anchorOrigin.horizontal)
      };
    }
  
    // Returns the vertical offset of inner content to anchor the transform on if provided
    getContentAnchorOffset(element) {
      const { getContentAnchorEl, anchorReference } = this.props;
      let contentAnchorOffset = 0;
  
      if (getContentAnchorEl && anchorReference === 'anchorEl') {
        const contentAnchorEl = getContentAnchorEl(element);
  
        if (contentAnchorEl && contains(element, contentAnchorEl)) {
          const scrollTop = getScrollParent(element, contentAnchorEl);
          contentAnchorOffset = contentAnchorEl.offsetTop + contentAnchorEl.clientHeight / 2 - scrollTop || 0;
        }
  
        // != the default value
        process.env.NODE_ENV !== "production" ? warning(this.props.anchorOrigin.vertical === 'top', ['Material-UI: you can not change the default `anchorOrigin.vertical` value ', 'when also providing the `getContentAnchorEl` property to the popover component.', 'Only use one of the two properties.', 'Set `getContentAnchorEl` to null or left `anchorOrigin.vertical` unchanged.'].join('\n')) : void 0;
      }
  
      return contentAnchorOffset;
    }
  
    // Return the base transform origin using the element
    // and taking the content anchor offset into account if in use
    getTransformOrigin(elemRect, contentAnchorOffset = 0) {
      const { transformOrigin } = this.props;
      return {
        vertical: this.handleGetOffsetTop(elemRect, transformOrigin.vertical) + contentAnchorOffset,
        horizontal: this.handleGetOffsetLeft(elemRect, transformOrigin.horizontal)
      };
    }
  
    render() {
      const _props = this.props,
            {
        anchorEl,
        anchorOrigin,
        anchorPosition,
        anchorReference,
        children,
        classes,
        container: containerProp,
        elevation,
        getContentAnchorEl,
        marginThreshold,
        onEnter,
        onEntered,
        onEntering,
        onExit,
        onExited,
        onExiting,
        open,
        PaperProps,
        role,
        transformOrigin,
        transition: TransitionProp,
        transitionDuration,
        action
      } = _props,
            other = _objectWithoutProperties(_props, ['anchorEl', 'anchorOrigin', 'anchorPosition', 'anchorReference', 'children', 'classes', 'container', 'elevation', 'getContentAnchorEl', 'marginThreshold', 'onEnter', 'onEntered', 'onEntering', 'onExit', 'onExited', 'onExiting', 'open', 'PaperProps', 'role', 'transformOrigin', 'transition', 'transitionDuration', 'action']);
  
      // If the container prop is provided, use that
      // If the anchorEl prop is provided, use its parent body element as the container
      // If neither are provided let the Modal take care of choosing the container
      const container = containerProp || (anchorEl ? ownerDocument(anchorEl).body : undefined);
  
      const transitionProps = {};
      // The provided transition might not support the auto timeout value.
      if (TransitionProp === Grow) {
        transitionProps.timeout = transitionDuration;
      }
  
      return React.createElement(
        Modal,
        _extends({ container: container, open: open, BackdropProps: { invisible: true } }, other),
        React.createElement(
          TransitionProp,
          _extends({
            appear: true,
            'in': open,
            onEnter: this.handleEnter,
            onEntered: onEntered,
            onEntering: onEntering,
            onExit: onExit,
            onExited: onExited,
            onExiting: onExiting,
            role: role,
            ref: node => {
              this.transitionEl = node;
            }
          }, transitionProps),
          React.createElement(
            Paper,
            _extends({
              className: classes.paper,
  
              elevation: elevation
            }, PaperProps),
            React.createElement(EventListener, { target: 'window', onResize: this.handleResize }),
            children
          )
        )
      );
    }
  }
  
  Popover.propTypes = process.env.NODE_ENV !== "production" ? {
    /**
     * This is callback property. It's called by the component on mount.
     * This is useful when you want to trigger an action programmatically.
     * It currently only supports updatePosition() action.
     *
     * @param {object} actions This object contains all posible actions
     * that can be triggered programmatically.
     */
    action: PropTypes.func,
    /**
     * This is the DOM element that may be used
     * to set the position of the popover.
     */
    anchorEl: PropTypes.object,
    /**
     * This is the point on the anchor where the popover's
     * `anchorEl` will attach to. This is not used when the
     * anchorReference is 'anchorPosition'.
     *
     * Options:
     * vertical: [top, center, bottom];
     * horizontal: [left, center, right].
     */
    anchorOrigin: PropTypes.shape({
      horizontal: PropTypes.oneOfType([PropTypes.number, PropTypes.oneOf(['left', 'center', 'right'])]),
      vertical: PropTypes.oneOfType([PropTypes.number, PropTypes.oneOf(['top', 'center', 'bottom'])])
    }),
    /**
     * This is the position that may be used
     * to set the position of the popover.
     * The coordinates are relative to
     * the application's client area.
     */
    anchorPosition: PropTypes.shape({
      top: PropTypes.number,
      left: PropTypes.number
    }),
    /*
     * This determines which anchor prop to refer to to set
     * the position of the popover.
     */
    anchorReference: PropTypes.oneOf(['anchorEl', 'anchorPosition']),
    /**
     * The content of the component.
     */
    children: PropTypes.node,
    /**
     * Useful to extend the style applied to components.
     */
    classes: PropTypes.object.isRequired,
    /**
     * A node, component instance, or function that returns either.
     * The `container` will passed to the Modal component.
     * By default, it's using the body of the anchorEl's top-level document object,
     * so it's simply `document.body` most of the time.
     */
    container: PropTypes.oneOfType([PropTypes.object, PropTypes.func]),
    /**
     * The elevation of the popover.
     */
    elevation: PropTypes.number,
    /**
     * This function is called in order to retrieve the content anchor element.
     * It's the opposite of the `anchorEl` property.
     * The content anchor element should be an element inside the popover.
     * It's used to correctly scroll and set the position of the popover.
     * The positioning strategy tries to make the content anchor element just above the
     * anchor element.
     */
    getContentAnchorEl: PropTypes.func,
    /**
     * Specifies how close to the edge of the window the popover can appear.
     */
    marginThreshold: PropTypes.number,
    /**
     * Callback fired when the component requests to be closed.
     *
     * @param {object} event The event source of the callback.
     */
    onClose: PropTypes.func,
    /**
     * Callback fired before the component is entering.
     */
    onEnter: PropTypes.func,
    /**
     * Callback fired when the component has entered.
     */
    onEntered: PropTypes.func,
    /**
     * Callback fired when the component is entering.
     */
    onEntering: PropTypes.func,
    /**
     * Callback fired before the component is exiting.
     */
    onExit: PropTypes.func,
    /**
     * Callback fired when the component has exited.
     */
    onExited: PropTypes.func,
    /**
     * Callback fired when the component is exiting.
     */
    onExiting: PropTypes.func,
    /**
     * If `true`, the popover is visible.
     */
    open: PropTypes.bool.isRequired,
    /**
     * Properties applied to the `Paper` element.
     */
    PaperProps: PropTypes.object,
    /**
     * @ignore
     */
    role: PropTypes.string,
    /**
     * This is the point on the popover which
     * will attach to the anchor's origin.
     *
     * Options:
     * vertical: [top, center, bottom, x(px)];
     * horizontal: [left, center, right, x(px)].
     */
    transformOrigin: PropTypes.shape({
      horizontal: PropTypes.oneOfType([PropTypes.number, PropTypes.oneOf(['left', 'center', 'right'])]),
      vertical: PropTypes.oneOfType([PropTypes.number, PropTypes.oneOf(['top', 'center', 'bottom'])])
    }),
    /**
     * Transition component.
     */
    transition: PropTypes.oneOfType([PropTypes.string, PropTypes.func]),
    /**
     * Set to 'auto' to automatically calculate transition time based on height.
     */
    transitionDuration: PropTypes.oneOfType([PropTypes.number, PropTypes.shape({ enter: PropTypes.number, exit: PropTypes.number }), PropTypes.oneOf(['auto'])])
  } : {};
  
  Popover.defaultProps = {
    anchorReference: 'anchorEl',
    anchorOrigin: {
      vertical: 'top',
      horizontal: 'left'
    },
    elevation: 8,
    marginThreshold: 16,
    transformOrigin: {
      vertical: 'top',
      horizontal: 'left'
    },
    transition: Grow,
    transitionDuration: 'auto'
  };
  
  export default withStyles(styles, { name: 'MuiPopover' })(Popover);