'use strict';

var React = require('react');

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

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;
  };
}();

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 inherits = function (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;
};

var possibleConstructorReturn = function (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;
};

var slicedToArray = function () {
  function sliceIterator(arr, i) {
    var _arr = [];
    var _n = true;
    var _d = false;
    var _e = undefined;

    try {
      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
        _arr.push(_s.value);

        if (i && _arr.length === i) break;
      }
    } catch (err) {
      _d = true;
      _e = err;
    } finally {
      try {
        if (!_n && _i["return"]) _i["return"]();
      } finally {
        if (_d) throw _e;
      }
    }

    return _arr;
  }

  return function (arr, i) {
    if (Array.isArray(arr)) {
      return arr;
    } else if (Symbol.iterator in Object(arr)) {
      return sliceIterator(arr, i);
    } else {
      throw new TypeError("Invalid attempt to destructure non-iterable instance");
    }
  };
}();

/**
 * Detect Element Resize.
 * https://github.com/sdecima/javascript-detect-element-resize
 * Sebastian Decima
 *
 * Forked from version 0.5.3; includes the following modifications:
 * 1) Guard against unsafe 'window' and 'document' references (to support SSR).
 * 2) Defer initialization code via a top-level function wrapper (to support SSR).
 * 3) Avoid unnecessary reflows by not measuring size for scroll events bubbling from children.
 * 4) Add nonce for style element.
 **/

// Check `document` and `window` in case of server-side rendering
var windowObject = void 0;
if (typeof window !== 'undefined') {
  windowObject = window;

  // eslint-disable-next-line no-restricted-globals
} else if (typeof self !== 'undefined') {
  // eslint-disable-next-line no-restricted-globals
  windowObject = self;
} else {
  windowObject = global;
}

var cancelFrame = null;
var requestFrame = null;

var TIMEOUT_DURATION = 20;

var clearTimeoutFn = windowObject.clearTimeout;
var setTimeoutFn = windowObject.setTimeout;

var cancelAnimationFrameFn = windowObject.cancelAnimationFrame || windowObject.mozCancelAnimationFrame || windowObject.webkitCancelAnimationFrame;

var requestAnimationFrameFn = windowObject.requestAnimationFrame || windowObject.mozRequestAnimationFrame || windowObject.webkitRequestAnimationFrame;

if (cancelAnimationFrameFn == null || requestAnimationFrameFn == null) {
  // For environments that don't support animation frame,
  // fallback to a setTimeout based approach.
  cancelFrame = clearTimeoutFn;
  requestFrame = function requestAnimationFrameViaSetTimeout(callback) {
    return setTimeoutFn(callback, TIMEOUT_DURATION);
  };
} else {
  // Counter intuitively, environments that support animation frames can be trickier.
  // Chrome's "Throttle non-visible cross-origin iframes" flag can prevent rAFs from being called.
  // In this case, we should fallback to a setTimeout() implementation.
  cancelFrame = function cancelFrame(_ref) {
    var _ref2 = slicedToArray(_ref, 2),
        animationFrameID = _ref2[0],
        timeoutID = _ref2[1];

    cancelAnimationFrameFn(animationFrameID);
    clearTimeoutFn(timeoutID);
  };
  requestFrame = function requestAnimationFrameWithSetTimeoutFallback(callback) {
    var animationFrameID = requestAnimationFrameFn(function animationFrameCallback() {
      clearTimeoutFn(timeoutID);
      callback();
    });

    var timeoutID = setTimeoutFn(function timeoutCallback() {
      cancelAnimationFrameFn(animationFrameID);
      callback();
    }, TIMEOUT_DURATION);

    return [animationFrameID, timeoutID];
  };
}

function createDetectElementResize(nonce) {
  var animationKeyframes = void 0;
  var animationName = void 0;
  var animationStartEvent = void 0;
  var animationStyle = void 0;
  var checkTriggers = void 0;
  var resetTriggers = void 0;
  var scrollListener = void 0;

  var attachEvent = typeof document !== 'undefined' && document.attachEvent;
  if (!attachEvent) {
    resetTriggers = function resetTriggers(element) {
      var triggers = element.__resizeTriggers__,
          expand = triggers.firstElementChild,
          contract = triggers.lastElementChild,
          expandChild = expand.firstElementChild;
      contract.scrollLeft = contract.scrollWidth;
      contract.scrollTop = contract.scrollHeight;
      expandChild.style.width = expand.offsetWidth + 1 + 'px';
      expandChild.style.height = expand.offsetHeight + 1 + 'px';
      expand.scrollLeft = expand.scrollWidth;
      expand.scrollTop = expand.scrollHeight;
    };

    checkTriggers = function checkTriggers(element) {
      return element.offsetWidth !== element.__resizeLast__.width || element.offsetHeight !== element.__resizeLast__.height;
    };

    scrollListener = function scrollListener(e) {
      // Don't measure (which forces) reflow for scrolls that happen inside of children!
      if (e.target.className && typeof e.target.className.indexOf === 'function' && e.target.className.indexOf('contract-trigger') < 0 && e.target.className.indexOf('expand-trigger') < 0) {
        return;
      }

      var element = this;
      resetTriggers(this);
      if (this.__resizeRAF__) {
        cancelFrame(this.__resizeRAF__);
      }
      this.__resizeRAF__ = requestFrame(function animationFrame() {
        if (checkTriggers(element)) {
          element.__resizeLast__.width = element.offsetWidth;
          element.__resizeLast__.height = element.offsetHeight;
          element.__resizeListeners__.forEach(function forEachResizeListener(fn) {
            fn.call(element, e);
          });
        }
      });
    };

    /* Detect CSS Animations support to detect element display/re-attach */
    var animation = false;
    var keyframeprefix = '';
    animationStartEvent = 'animationstart';
    var domPrefixes = 'Webkit Moz O ms'.split(' ');
    var startEvents = 'webkitAnimationStart animationstart oAnimationStart MSAnimationStart'.split(' ');
    var pfx = '';
    {
      var elm = document.createElement('fakeelement');
      if (elm.style.animationName !== undefined) {
        animation = true;
      }

      if (animation === false) {
        for (var i = 0; i < domPrefixes.length; i++) {
          if (elm.style[domPrefixes[i] + 'AnimationName'] !== undefined) {
            pfx = domPrefixes[i];
            keyframeprefix = '-' + pfx.toLowerCase() + '-';
            animationStartEvent = startEvents[i];
            animation = true;
            break;
          }
        }
      }
    }

    animationName = 'resizeanim';
    animationKeyframes = '@' + keyframeprefix + 'keyframes ' + animationName + ' { from { opacity: 0; } to { opacity: 0; } } ';
    animationStyle = keyframeprefix + 'animation: 1ms ' + animationName + '; ';
  }

  var createStyles = function createStyles(doc) {
    if (!doc.getElementById('detectElementResize')) {
      //opacity:0 works around a chrome bug https://code.google.com/p/chromium/issues/detail?id=286360
      var css = (animationKeyframes ? animationKeyframes : '') + '.resize-triggers { ' + (animationStyle ? animationStyle : '') + 'visibility: hidden; opacity: 0; } ' + '.resize-triggers, .resize-triggers > div, .contract-trigger:before { content: " "; display: block; position: absolute; top: 0; left: 0; height: 100%; width: 100%; overflow: hidden; z-index: -1; } .resize-triggers > div { background: #eee; overflow: auto; } .contract-trigger:before { width: 200%; height: 200%; }',
          head = doc.head || doc.getElementsByTagName('head')[0],
          style = doc.createElement('style');

      style.id = 'detectElementResize';
      style.type = 'text/css';

      if (nonce != null) {
        style.setAttribute('nonce', nonce);
      }

      if (style.styleSheet) {
        style.styleSheet.cssText = css;
      } else {
        style.appendChild(doc.createTextNode(css));
      }

      head.appendChild(style);
    }
  };

  var addResizeListener = function addResizeListener(element, fn) {
    if (attachEvent) {
      element.attachEvent('onresize', fn);
    } else {
      if (!element.__resizeTriggers__) {
        var doc = element.ownerDocument;
        var elementStyle = windowObject.getComputedStyle(element);
        if (elementStyle && elementStyle.position === 'static') {
          element.style.position = 'relative';
        }
        createStyles(doc);
        element.__resizeLast__ = {};
        element.__resizeListeners__ = [];
        (element.__resizeTriggers__ = doc.createElement('div')).className = 'resize-triggers';
        var expandTrigger = doc.createElement('div');
        expandTrigger.className = 'expand-trigger';
        expandTrigger.appendChild(doc.createElement('div'));
        var contractTrigger = doc.createElement('div');
        contractTrigger.className = 'contract-trigger';
        element.__resizeTriggers__.appendChild(expandTrigger);
        element.__resizeTriggers__.appendChild(contractTrigger);
        element.appendChild(element.__resizeTriggers__);
        resetTriggers(element);
        element.addEventListener('scroll', scrollListener, true);

        /* Listen for a css animation to detect element display/re-attach */
        if (animationStartEvent) {
          element.__resizeTriggers__.__animationListener__ = function animationListener(e) {
            if (e.animationName === animationName) {
              resetTriggers(element);
            }
          };
          element.__resizeTriggers__.addEventListener(animationStartEvent, element.__resizeTriggers__.__animationListener__);
        }
      }
      element.__resizeListeners__.push(fn);
    }
  };

  var removeResizeListener = function removeResizeListener(element, fn) {
    if (attachEvent) {
      element.detachEvent('onresize', fn);
    } else {
      element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);
      if (!element.__resizeListeners__.length) {
        element.removeEventListener('scroll', scrollListener, true);
        if (element.__resizeTriggers__.__animationListener__) {
          element.__resizeTriggers__.removeEventListener(animationStartEvent, element.__resizeTriggers__.__animationListener__);
          element.__resizeTriggers__.__animationListener__ = null;
        }
        try {
          element.__resizeTriggers__ = !element.removeChild(element.__resizeTriggers__);
        } catch (e) {
          // Preact compat; see developit/preact-compat/issues/228
        }
      }
    }
  };

  return {
    addResizeListener: addResizeListener,
    removeResizeListener: removeResizeListener
  };
}

var AutoSizer = function (_React$PureComponent) {
  inherits(AutoSizer, _React$PureComponent);

  function AutoSizer() {
    var _ref;

    var _temp, _this, _ret;

    classCallCheck(this, AutoSizer);

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

    return _ret = (_temp = (_this = possibleConstructorReturn(this, (_ref = AutoSizer.__proto__ || Object.getPrototypeOf(AutoSizer)).call.apply(_ref, [this].concat(args))), _this), _this.state = {
      height: _this.props.defaultHeight || 0,
      width: _this.props.defaultWidth || 0
    }, _this._onResize = function () {
      var _this$props = _this.props,
          disableHeight = _this$props.disableHeight,
          disableWidth = _this$props.disableWidth,
          onResize = _this$props.onResize;


      if (_this._parentNode) {
        // Guard against AutoSizer component being removed from the DOM immediately after being added.
        // This can result in invalid style values which can result in NaN values if we don't handle them.
        // See issue #150 for more context.

        var _height = _this._parentNode.offsetHeight || 0;
        var _width = _this._parentNode.offsetWidth || 0;

        var _style = window.getComputedStyle(_this._parentNode) || {};
        var paddingLeft = parseInt(_style.paddingLeft, 10) || 0;
        var paddingRight = parseInt(_style.paddingRight, 10) || 0;
        var paddingTop = parseInt(_style.paddingTop, 10) || 0;
        var paddingBottom = parseInt(_style.paddingBottom, 10) || 0;

        var newHeight = _height - paddingTop - paddingBottom;
        var newWidth = _width - paddingLeft - paddingRight;

        if (!disableHeight && _this.state.height !== newHeight || !disableWidth && _this.state.width !== newWidth) {
          _this.setState({
            height: _height - paddingTop - paddingBottom,
            width: _width - paddingLeft - paddingRight
          });

          onResize({ height: _height, width: _width });
        }
      }
    }, _this._setRef = function (autoSizer) {
      _this._autoSizer = autoSizer;
    }, _temp), possibleConstructorReturn(_this, _ret);
  }

  createClass(AutoSizer, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      var nonce = this.props.nonce;

      if (this._autoSizer && this._autoSizer.parentNode && this._autoSizer.parentNode.ownerDocument && this._autoSizer.parentNode.ownerDocument.defaultView && this._autoSizer.parentNode instanceof this._autoSizer.parentNode.ownerDocument.defaultView.HTMLElement) {
        // Delay access of parentNode until mount.
        // This handles edge-cases where the component has already been unmounted before its ref has been set,
        // As well as libraries like react-lite which have a slightly different lifecycle.
        this._parentNode = this._autoSizer.parentNode;

        // Defer requiring resize handler in order to support server-side rendering.
        // See issue #41
        this._detectElementResize = createDetectElementResize(nonce);
        this._detectElementResize.addResizeListener(this._parentNode, this._onResize);

        this._onResize();
      }
    }
  }, {
    key: 'componentWillUnmount',
    value: function componentWillUnmount() {
      if (this._detectElementResize && this._parentNode) {
        this._detectElementResize.removeResizeListener(this._parentNode, this._onResize);
      }
    }
  }, {
    key: 'render',
    value: function render() {
      var _props = this.props,
          children = _props.children,
          className = _props.className,
          disableHeight = _props.disableHeight,
          disableWidth = _props.disableWidth,
          style = _props.style;
      var _state = this.state,
          height = _state.height,
          width = _state.width;

      // Outer div should not force width/height since that may prevent containers from shrinking.
      // Inner component should overflow and use calculated width/height.
      // See issue #68 for more information.

      var outerStyle = { overflow: 'visible' };
      var childParams = {};

      // Avoid rendering children before the initial measurements have been collected.
      // At best this would just be wasting cycles.
      var bailoutOnChildren = false;

      if (!disableHeight) {
        if (height === 0) {
          bailoutOnChildren = true;
        }
        outerStyle.height = 0;
        childParams.height = height;
      }

      if (!disableWidth) {
        if (width === 0) {
          bailoutOnChildren = true;
        }
        outerStyle.width = 0;
        childParams.width = width;
      }

      return React.createElement(
        'div',
        {
          className: className,
          ref: this._setRef,
          style: _extends({}, outerStyle, style)
        },
        !bailoutOnChildren && children(childParams)
      );
    }
  }]);
  return AutoSizer;
}(React.PureComponent);

AutoSizer.defaultProps = {
  onResize: function onResize() {},
  disableHeight: false,
  disableWidth: false,
  style: {}
};

module.exports = AutoSizer;