react-virtualized/dist/es/CellMeasurer/CellMeasurer.js

React components for efficiently rendering large, scrollable lists and tabular data

import _Object$getPrototypeOf from 'babel-runtime/core-js/object/get-prototype-of';
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
import _createClass from 'babel-runtime/helpers/createClass';
import _possibleConstructorReturn from 'babel-runtime/helpers/possibleConstructorReturn';
import _inherits from 'babel-runtime/helpers/inherits';
import * as React from 'react';
import { findDOMNode } from 'react-dom';

/**
 * Wraps a cell and measures its rendered content.
 * Measurements are stored in a per-cell cache.
 * Cached-content is not be re-measured.
 */
var CellMeasurer = function (_React$PureComponent) {
  _inherits(CellMeasurer, _React$PureComponent);

  function CellMeasurer() {
    var _ref;

    var _temp, _this, _ret;

    _classCallCheck(this, CellMeasurer);

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

    return _ret = (_temp = (_this = _possibleConstructorReturn(this, (_ref = CellMeasurer.__proto__ || _Object$getPrototypeOf(CellMeasurer)).call.apply(_ref, [this].concat(args))), _this), _this._measure = function () {
      var _this$props = _this.props,
          cache = _this$props.cache,
          _this$props$columnInd = _this$props.columnIndex,
          columnIndex = _this$props$columnInd === undefined ? 0 : _this$props$columnInd,
          parent = _this$props.parent,
          _this$props$rowIndex = _this$props.rowIndex,
          rowIndex = _this$props$rowIndex === undefined ? _this.props.index || 0 : _this$props$rowIndex;

      var _this$_getCellMeasure = _this._getCellMeasurements(),
          height = _this$_getCellMeasure.height,
          width = _this$_getCellMeasure.width;

      if (height !== cache.getHeight(rowIndex, columnIndex) || width !== cache.getWidth(rowIndex, columnIndex)) {
        cache.set(rowIndex, columnIndex, width, height);

        if (parent && typeof parent.recomputeGridSize === 'function') {
          parent.recomputeGridSize({
            columnIndex: columnIndex,
            rowIndex: rowIndex
          });
        }
      }
    }, _temp), _possibleConstructorReturn(_this, _ret);
  }

  _createClass(CellMeasurer, [{
    key: 'componentDidMount',
    value: function componentDidMount() {
      this._maybeMeasureCell();
    }
  }, {
    key: 'componentDidUpdate',
    value: function componentDidUpdate() {
      this._maybeMeasureCell();
    }
  }, {
    key: 'render',
    value: function render() {
      var children = this.props.children;


      return typeof children === 'function' ? children({ measure: this._measure }) : children;
    }
  }, {
    key: '_getCellMeasurements',
    value: function _getCellMeasurements() {
      var cache = this.props.cache;


      var node = findDOMNode(this);

      // TODO Check for a bad combination of fixedWidth and missing numeric width or vice versa with height

      if (node && node.ownerDocument && node.ownerDocument.defaultView && node instanceof node.ownerDocument.defaultView.HTMLElement) {
        var styleWidth = node.style.width;
        var styleHeight = node.style.height;

        // If we are re-measuring a cell that has already been measured,
        // It will have a hard-coded width/height from the previous measurement.
        // The fact that we are measuring indicates this measurement is probably stale,
        // So explicitly clear it out (eg set to "auto") so we can recalculate.
        // See issue #593 for more info.
        // Even if we are measuring initially- if we're inside of a MultiGrid component,
        // Explicitly clear width/height before measuring to avoid being tainted by another Grid.
        // eg top/left Grid renders before bottom/right Grid
        // Since the CellMeasurerCache is shared between them this taints derived cell size values.
        if (!cache.hasFixedWidth()) {
          node.style.width = 'auto';
        }
        if (!cache.hasFixedHeight()) {
          node.style.height = 'auto';
        }

        var height = Math.ceil(node.offsetHeight);
        var width = Math.ceil(node.offsetWidth);

        // Reset after measuring to avoid breaking styles; see #660
        if (styleWidth) {
          node.style.width = styleWidth;
        }
        if (styleHeight) {
          node.style.height = styleHeight;
        }

        return { height: height, width: width };
      } else {
        return { height: 0, width: 0 };
      }
    }
  }, {
    key: '_maybeMeasureCell',
    value: function _maybeMeasureCell() {
      var _props = this.props,
          cache = _props.cache,
          _props$columnIndex = _props.columnIndex,
          columnIndex = _props$columnIndex === undefined ? 0 : _props$columnIndex,
          parent = _props.parent,
          _props$rowIndex = _props.rowIndex,
          rowIndex = _props$rowIndex === undefined ? this.props.index || 0 : _props$rowIndex;


      if (!cache.has(rowIndex, columnIndex)) {
        var _getCellMeasurements2 = this._getCellMeasurements(),
            height = _getCellMeasurements2.height,
            width = _getCellMeasurements2.width;

        cache.set(rowIndex, columnIndex, width, height);

        // If size has changed, let Grid know to re-render.
        if (parent && typeof parent.invalidateCellSizeAfterRender === 'function') {
          parent.invalidateCellSizeAfterRender({
            columnIndex: columnIndex,
            rowIndex: rowIndex
          });
        }
      }
    }
  }]);

  return CellMeasurer;
}(React.PureComponent);

// Used for DEV mode warning check


CellMeasurer.__internalCellMeasurerFlag = false;
CellMeasurer.propTypes = process.env.NODE_ENV === 'production' ? null : {
  cache: function cache() {
    return (typeof bpfrpt_proptype_CellMeasureCache === 'function' ? bpfrpt_proptype_CellMeasureCache.isRequired ? bpfrpt_proptype_CellMeasureCache.isRequired : bpfrpt_proptype_CellMeasureCache : PropTypes.shape(bpfrpt_proptype_CellMeasureCache).isRequired).apply(this, arguments);
  },
  children: PropTypes.oneOfType([PropTypes.func, PropTypes.node]).isRequired,
  columnIndex: PropTypes.number,
  index: PropTypes.number,
  parent: PropTypes.shape({
    invalidateCellSizeAfterRender: PropTypes.func,
    recomputeGridSize: PropTypes.func
  }).isRequired,
  rowIndex: PropTypes.number
};
export default CellMeasurer;
if (process.env.NODE_ENV !== 'production') {
  CellMeasurer.__internalCellMeasurerFlag = true;
}
import { bpfrpt_proptype_CellMeasureCache } from './types';
import PropTypes from 'prop-types';