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Viewing file:     ArrowKeyStepper.js (8.2 KB)      -rw-r--r--

import _classCallCheck from "@babel/runtime/helpers/classCallCheck";
import _createClass from "@babel/runtime/helpers/createClass";
import _possibleConstructorReturn from "@babel/runtime/helpers/possibleConstructorReturn";
import _getPrototypeOf from "@babel/runtime/helpers/getPrototypeOf";
import _assertThisInitialized from "@babel/runtime/helpers/assertThisInitialized";
import _inherits from "@babel/runtime/helpers/inherits";
import _defineProperty from "@babel/runtime/helpers/defineProperty";

var _class, _temp;

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(source, true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(source).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

import * as React from 'react';
import { polyfill } from 'react-lifecycles-compat';
/**
 * This HOC decorates a virtualized component and responds to arrow-key events by scrolling one row or column at a time.
 */

var ArrowKeyStepper = (_temp = _class =
/*#__PURE__*/
function (_React$PureComponent) {
  _inherits(ArrowKeyStepper, _React$PureComponent);

  function ArrowKeyStepper() {
    var _getPrototypeOf2;

    var _this;

    _classCallCheck(this, ArrowKeyStepper);

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

    _this = _possibleConstructorReturn(this, (_getPrototypeOf2 = _getPrototypeOf(ArrowKeyStepper)).call.apply(_getPrototypeOf2, [this].concat(args)));

    _defineProperty(_assertThisInitialized(_this), "state", {
      scrollToColumn: 0,
      scrollToRow: 0,
      instanceProps: {
        prevScrollToColumn: 0,
        prevScrollToRow: 0
      }
    });

    _defineProperty(_assertThisInitialized(_this), "_columnStartIndex", 0);

    _defineProperty(_assertThisInitialized(_this), "_columnStopIndex", 0);

    _defineProperty(_assertThisInitialized(_this), "_rowStartIndex", 0);

    _defineProperty(_assertThisInitialized(_this), "_rowStopIndex", 0);

    _defineProperty(_assertThisInitialized(_this), "_onKeyDown", function (event) {
      var _this$props = _this.props,
          columnCount = _this$props.columnCount,
          disabled = _this$props.disabled,
          mode = _this$props.mode,
          rowCount = _this$props.rowCount;

      if (disabled) {
        return;
      }

      var _this$_getScrollState = _this._getScrollState(),
          scrollToColumnPrevious = _this$_getScrollState.scrollToColumn,
          scrollToRowPrevious = _this$_getScrollState.scrollToRow;

      var _this$_getScrollState2 = _this._getScrollState(),
          scrollToColumn = _this$_getScrollState2.scrollToColumn,
          scrollToRow = _this$_getScrollState2.scrollToRow; // The above cases all prevent default event event behavior.
      // This is to keep the grid from scrolling after the snap-to update.


      switch (event.key) {
        case 'ArrowDown':
          scrollToRow = mode === 'cells' ? Math.min(scrollToRow + 1, rowCount - 1) : Math.min(_this._rowStopIndex + 1, rowCount - 1);
          break;

        case 'ArrowLeft':
          scrollToColumn = mode === 'cells' ? Math.max(scrollToColumn - 1, 0) : Math.max(_this._columnStartIndex - 1, 0);
          break;

        case 'ArrowRight':
          scrollToColumn = mode === 'cells' ? Math.min(scrollToColumn + 1, columnCount - 1) : Math.min(_this._columnStopIndex + 1, columnCount - 1);
          break;

        case 'ArrowUp':
          scrollToRow = mode === 'cells' ? Math.max(scrollToRow - 1, 0) : Math.max(_this._rowStartIndex - 1, 0);
          break;
      }

      if (scrollToColumn !== scrollToColumnPrevious || scrollToRow !== scrollToRowPrevious) {
        event.preventDefault();

        _this._updateScrollState({
          scrollToColumn: scrollToColumn,
          scrollToRow: scrollToRow
        });
      }
    });

    _defineProperty(_assertThisInitialized(_this), "_onSectionRendered", function (_ref) {
      var columnStartIndex = _ref.columnStartIndex,
          columnStopIndex = _ref.columnStopIndex,
          rowStartIndex = _ref.rowStartIndex,
          rowStopIndex = _ref.rowStopIndex;
      _this._columnStartIndex = columnStartIndex;
      _this._columnStopIndex = columnStopIndex;
      _this._rowStartIndex = rowStartIndex;
      _this._rowStopIndex = rowStopIndex;
    });

    return _this;
  }

  _createClass(ArrowKeyStepper, [{
    key: "setScrollIndexes",
    value: function setScrollIndexes(_ref2) {
      var scrollToColumn = _ref2.scrollToColumn,
          scrollToRow = _ref2.scrollToRow;
      this.setState({
        scrollToRow: scrollToRow,
        scrollToColumn: scrollToColumn
      });
    }
  }, {
    key: "render",
    value: function render() {
      var _this$props2 = this.props,
          className = _this$props2.className,
          children = _this$props2.children;

      var _this$_getScrollState3 = this._getScrollState(),
          scrollToColumn = _this$_getScrollState3.scrollToColumn,
          scrollToRow = _this$_getScrollState3.scrollToRow;

      return React.createElement("div", {
        className: className,
        onKeyDown: this._onKeyDown
      }, children({
        onSectionRendered: this._onSectionRendered,
        scrollToColumn: scrollToColumn,
        scrollToRow: scrollToRow
      }));
    }
  }, {
    key: "_getScrollState",
    value: function _getScrollState() {
      return this.props.isControlled ? this.props : this.state;
    }
  }, {
    key: "_updateScrollState",
    value: function _updateScrollState(_ref3) {
      var scrollToColumn = _ref3.scrollToColumn,
          scrollToRow = _ref3.scrollToRow;
      var _this$props3 = this.props,
          isControlled = _this$props3.isControlled,
          onScrollToChange = _this$props3.onScrollToChange;

      if (typeof onScrollToChange === 'function') {
        onScrollToChange({
          scrollToColumn: scrollToColumn,
          scrollToRow: scrollToRow
        });
      }

      if (!isControlled) {
        this.setState({
          scrollToColumn: scrollToColumn,
          scrollToRow: scrollToRow
        });
      }
    }
  }], [{
    key: "getDerivedStateFromProps",
    value: function getDerivedStateFromProps(nextProps, prevState) {
      if (nextProps.isControlled) {
        return {};
      }

      if (nextProps.scrollToColumn !== prevState.instanceProps.prevScrollToColumn || nextProps.scrollToRow !== prevState.instanceProps.prevScrollToRow) {
        return _objectSpread({}, prevState, {
          scrollToColumn: nextProps.scrollToColumn,
          scrollToRow: nextProps.scrollToRow,
          instanceProps: {
            prevScrollToColumn: nextProps.scrollToColumn,
            prevScrollToRow: nextProps.scrollToRow
          }
        });
      }

      return {};
    }
  }]);

  return ArrowKeyStepper;
}(React.PureComponent), _defineProperty(_class, "propTypes", process.env.NODE_ENV === 'production' ? null : {
  "children": PropTypes.func.isRequired,
  "className": PropTypes.string,
  "columnCount": PropTypes.number.isRequired,
  "disabled": PropTypes.bool.isRequired,
  "isControlled": PropTypes.bool.isRequired,
  "mode": PropTypes.oneOf(["cells", "edges"]).isRequired,
  "onScrollToChange": PropTypes.func,
  "rowCount": PropTypes.number.isRequired,
  "scrollToColumn": PropTypes.number.isRequired,
  "scrollToRow": PropTypes.number.isRequired
}), _temp);

_defineProperty(ArrowKeyStepper, "defaultProps", {
  disabled: false,
  isControlled: false,
  mode: 'edges',
  scrollToColumn: 0,
  scrollToRow: 0
});

polyfill(ArrowKeyStepper);
export default ArrowKeyStepper;
import { bpfrpt_proptype_RenderedSection } from "../Grid";
import { bpfrpt_proptype_ScrollIndices } from "./types";
import PropTypes from "prop-types";