'use strict';

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

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; }; }();

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

var _propTypes2 = _interopRequireDefault(_propTypes);

var _react = require('react');

var _react2 = _interopRequireDefault(_react);

var _CollectionView = require('./CollectionView');

var _CollectionView2 = _interopRequireDefault(_CollectionView);

var _calculateSizeAndPositionData2 = require('./utils/calculateSizeAndPositionData');

var _calculateSizeAndPositionData3 = _interopRequireDefault(_calculateSizeAndPositionData2);

var _getUpdatedOffsetForIndex = require('../utils/getUpdatedOffsetForIndex');

var _getUpdatedOffsetForIndex2 = _interopRequireDefault(_getUpdatedOffsetForIndex);

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

function _objectWithoutProperties(obj, keys) { var target = {}; for (var i in obj) { if (keys.indexOf(i) >= 0) continue; if (!Object.prototype.hasOwnProperty.call(obj, i)) continue; target[i] = obj[i]; } return target; }

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; }

/**
 * Renders scattered or non-linear data.
 * Unlike Grid, which renders checkerboard data, Collection can render arbitrarily positioned- even overlapping- data.
 */
var Collection = function (_PureComponent) {
  _inherits(Collection, _PureComponent);

  function Collection(props, context) {
    _classCallCheck(this, Collection);

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

    _this._cellMetadata = [];
    _this._lastRenderedCellIndices = [];

    // Cell cache during scroll (for perforamnce)
    _this._cellCache = [];

    _this._isScrollingChange = _this._isScrollingChange.bind(_this);
    _this._setCollectionViewRef = _this._setCollectionViewRef.bind(_this);
    return _this;
  }

  _createClass(Collection, [{
    key: 'forceUpdate',
    value: function forceUpdate() {
      if (this._collectionView !== undefined) {
        this._collectionView.forceUpdate();
      }
    }

    /** See Collection#recomputeCellSizesAndPositions */

  }, {
    key: 'recomputeCellSizesAndPositions',
    value: function recomputeCellSizesAndPositions() {
      this._cellCache = [];
      this._collectionView.recomputeCellSizesAndPositions();
    }

    /** React lifecycle methods */

  }, {
    key: 'render',
    value: function render() {
      var props = _objectWithoutProperties(this.props, []);

      return _react2.default.createElement(_CollectionView2.default, _extends({
        cellLayoutManager: this,
        isScrollingChange: this._isScrollingChange,
        ref: this._setCollectionViewRef
      }, props));
    }

    /** CellLayoutManager interface */

  }, {
    key: 'calculateSizeAndPositionData',
    value: function calculateSizeAndPositionData() {
      var _props = this.props,
          cellCount = _props.cellCount,
          cellSizeAndPositionGetter = _props.cellSizeAndPositionGetter,
          sectionSize = _props.sectionSize;


      var data = (0, _calculateSizeAndPositionData3.default)({
        cellCount: cellCount,
        cellSizeAndPositionGetter: cellSizeAndPositionGetter,
        sectionSize: sectionSize
      });

      this._cellMetadata = data.cellMetadata;
      this._sectionManager = data.sectionManager;
      this._height = data.height;
      this._width = data.width;
    }

    /**
     * Returns the most recently rendered set of cell indices.
     */

  }, {
    key: 'getLastRenderedIndices',
    value: function getLastRenderedIndices() {
      return this._lastRenderedCellIndices;
    }

    /**
     * Calculates the minimum amount of change from the current scroll position to ensure the specified cell is (fully) visible.
     */

  }, {
    key: 'getScrollPositionForCell',
    value: function getScrollPositionForCell(_ref) {
      var align = _ref.align,
          cellIndex = _ref.cellIndex,
          height = _ref.height,
          scrollLeft = _ref.scrollLeft,
          scrollTop = _ref.scrollTop,
          width = _ref.width;
      var cellCount = this.props.cellCount;


      if (cellIndex >= 0 && cellIndex < cellCount) {
        var cellMetadata = this._cellMetadata[cellIndex];

        scrollLeft = (0, _getUpdatedOffsetForIndex2.default)({
          align: align,
          cellOffset: cellMetadata.x,
          cellSize: cellMetadata.width,
          containerSize: width,
          currentOffset: scrollLeft,
          targetIndex: cellIndex
        });

        scrollTop = (0, _getUpdatedOffsetForIndex2.default)({
          align: align,
          cellOffset: cellMetadata.y,
          cellSize: cellMetadata.height,
          containerSize: height,
          currentOffset: scrollTop,
          targetIndex: cellIndex
        });
      }

      return {
        scrollLeft: scrollLeft,
        scrollTop: scrollTop
      };
    }
  }, {
    key: 'getTotalSize',
    value: function getTotalSize() {
      return {
        height: this._height,
        width: this._width
      };
    }
  }, {
    key: 'cellRenderers',
    value: function cellRenderers(_ref2) {
      var _this2 = this;

      var height = _ref2.height,
          isScrolling = _ref2.isScrolling,
          width = _ref2.width,
          x = _ref2.x,
          y = _ref2.y;
      var _props2 = this.props,
          cellGroupRenderer = _props2.cellGroupRenderer,
          cellRenderer = _props2.cellRenderer;

      // Store for later calls to getLastRenderedIndices()

      this._lastRenderedCellIndices = this._sectionManager.getCellIndices({
        height: height,
        width: width,
        x: x,
        y: y
      });

      return cellGroupRenderer({
        cellCache: this._cellCache,
        cellRenderer: cellRenderer,
        cellSizeAndPositionGetter: function cellSizeAndPositionGetter(_ref3) {
          var index = _ref3.index;
          return _this2._sectionManager.getCellMetadata({ index: index });
        },
        indices: this._lastRenderedCellIndices,
        isScrolling: isScrolling
      });
    }
  }, {
    key: '_isScrollingChange',
    value: function _isScrollingChange(isScrolling) {
      if (!isScrolling) {
        this._cellCache = [];
      }
    }
  }, {
    key: '_setCollectionViewRef',
    value: function _setCollectionViewRef(ref) {
      this._collectionView = ref;
    }
  }]);

  return Collection;
}(_react.PureComponent);

Collection.defaultProps = {
  'aria-label': 'grid',
  cellGroupRenderer: defaultCellGroupRenderer
};
exports.default = Collection;
process.env.NODE_ENV !== "production" ? Collection.propTypes = {
  'aria-label': _propTypes2.default.string,

  /**
   * Number of cells in Collection.
   */
  cellCount: _propTypes2.default.number.isRequired,

  /**
   * Responsible for rendering a group of cells given their indices.
   * Should implement the following interface: ({
   *   cellSizeAndPositionGetter:Function,
   *   indices: Array<number>,
   *   cellRenderer: Function
   * }): Array<PropTypes.node>
   */
  cellGroupRenderer: _propTypes2.default.func.isRequired,

  /**
   * Responsible for rendering a cell given an row and column index.
   * Should implement the following interface: ({ index: number, key: string, style: object }): PropTypes.element
   */
  cellRenderer: _propTypes2.default.func.isRequired,

  /**
   * Callback responsible for returning size and offset/position information for a given cell (index).
   * ({ index: number }): { height: number, width: number, x: number, y: number }
   */
  cellSizeAndPositionGetter: _propTypes2.default.func.isRequired,

  /**
   * Optionally override the size of the sections a Collection's cells are split into.
   */
  sectionSize: _propTypes2.default.number
} : void 0;


function defaultCellGroupRenderer(_ref4) {
  var cellCache = _ref4.cellCache,
      cellRenderer = _ref4.cellRenderer,
      cellSizeAndPositionGetter = _ref4.cellSizeAndPositionGetter,
      indices = _ref4.indices,
      isScrolling = _ref4.isScrolling;

  return indices.map(function (index) {
    var cellMetadata = cellSizeAndPositionGetter({ index: index });

    var cellRendererProps = {
      index: index,
      isScrolling: isScrolling,
      key: index,
      style: {
        height: cellMetadata.height,
        left: cellMetadata.x,
        position: 'absolute',
        top: cellMetadata.y,
        width: cellMetadata.width
      }
    };

    // Avoid re-creating cells while scrolling.
    // This can lead to the same cell being created many times and can cause performance issues for "heavy" cells.
    // If a scroll is in progress- cache and reuse cells.
    // This cache will be thrown away once scrolling complets.
    if (isScrolling) {
      if (!(index in cellCache)) {
        cellCache[index] = cellRenderer(cellRendererProps);
      }

      return cellCache[index];
    } else {
      return cellRenderer(cellRendererProps);
    }
  }).filter(function (renderedCell) {
    return !!renderedCell;
  });
}