metadata-based-explorer1/es/elements/common/KeyBinder.js

Box UI Elements

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/**
 * 
 * @file Item List Key bindings
 * @author Box
 */
import React, { PureComponent } from 'react';
import noop from 'lodash/noop';
import { isInputElement } from '../../utils/dom';

var KeyBinder =
/*#__PURE__*/
function (_PureComponent) {
  _inherits(KeyBinder, _PureComponent);

  /**
   * [constructor]
   *
   * @private
   * @return {KeyBinder}
   */
  function KeyBinder(props) {
    var _this;

    _classCallCheck(this, KeyBinder);

    _this = _possibleConstructorReturn(this, _getPrototypeOf(KeyBinder).call(this, props));

    _defineProperty(_assertThisInitialized(_this), "onKeyDown", function (event) {
      if (isInputElement(event.target)) {
        return;
      }

      var _this$props = _this.props,
          columnCount = _this$props.columnCount,
          rowCount = _this$props.rowCount,
          onSelect = _this$props.onSelect,
          onRename = _this$props.onRename,
          onDownload = _this$props.onDownload,
          onShare = _this$props.onShare,
          onDelete = _this$props.onDelete,
          onOpen = _this$props.onOpen,
          items = _this$props.items;
      var _this$state = _this.state,
          scrollToColumnPrevious = _this$state.scrollToColumn,
          scrollToRowPrevious = _this$state.scrollToRow;
      var _this$state2 = _this.state,
          scrollToColumn = _this$state2.scrollToColumn,
          scrollToRow = _this$state2.scrollToRow;
      var currentItem = items[scrollToRow];
      var ctrlMeta = event.metaKey || event.ctrlKey; // 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 = ctrlMeta ? rowCount - 1 : Math.min(scrollToRow + 1, rowCount - 1);
          event.stopPropagation(); // To prevent the arrow down capture of parent

          break;

        case 'ArrowLeft':
          scrollToColumn = ctrlMeta ? 0 : Math.max(scrollToColumn - 1, 0);
          break;

        case 'ArrowRight':
          scrollToColumn = ctrlMeta ? columnCount - 1 : Math.min(scrollToColumn + 1, columnCount - 1);
          break;

        case 'ArrowUp':
          scrollToRow = ctrlMeta ? 0 : Math.max(scrollToRow - 1, 0);
          break;

        case 'Enter':
          onOpen(currentItem);
          event.preventDefault();
          break;

        case 'Delete':
          onDelete(currentItem);
          event.preventDefault();
          break;

        case 'X':
          onSelect(currentItem);
          event.preventDefault();
          break;

        case 'D':
          onDownload(currentItem);
          event.preventDefault();
          break;

        case 'S':
          onShare(currentItem);
          event.preventDefault();
          break;

        case 'R':
          onRename(currentItem);
          event.preventDefault();
          break;

        default:
          return;
      }

      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;
    });

    _this.state = {
      scrollToColumn: props.scrollToColumn,
      scrollToRow: props.scrollToRow,
      focusOnRender: false
    };
    _this.columnStartIndex = 0;
    _this.columnStopIndex = 0;
    _this.rowStartIndex = 0;
    _this.rowStopIndex = 0;
    return _this;
  }
  /**
   * Resets scroll states and sets new states if
   * needed specially when collection changes
   *
   * @private
   * @inheritdoc
   * @return {void}
   */


  _createClass(KeyBinder, [{
    key: "componentWillReceiveProps",
    value: function componentWillReceiveProps(nextProps) {
      var id = nextProps.id,
          scrollToColumn = nextProps.scrollToColumn,
          scrollToRow = nextProps.scrollToRow;
      var prevId = this.props.id;
      var _this$state3 = this.state,
          prevScrollToColumn = _this$state3.scrollToColumn,
          prevScrollToRow = _this$state3.scrollToRow;
      var newState = {};

      if (id !== prevId) {
        // Only when the entire collection changes
        // like folder navigate, reset the scroll states
        newState.scrollToColumn = 0;
        newState.scrollToRow = 0;
        newState.focusOnRender = false;
      } else if (prevScrollToColumn !== scrollToColumn && prevScrollToRow !== scrollToRow) {
        newState.scrollToColumn = scrollToColumn;
        newState.scrollToRow = scrollToRow;
      } else if (prevScrollToColumn !== scrollToColumn) {
        newState.scrollToColumn = scrollToColumn;
      } else if (prevScrollToRow !== scrollToRow) {
        newState.scrollToRow = scrollToRow;
      } // Only update the state if there is something to set


      if (Object.keys(newState).length) {
        this.setState(newState);
      }
    }
    /**
     * Keyboard events
     *
     * @private
     * @inheritdoc
     * @return {void}
     */

  }, {
    key: "updateScrollState",

    /**
     * Updates the scroll states
     *
     * @private
     * @inheritdoc
     * @return {void}
     */
    value: function updateScrollState(_ref2) {
      var scrollToColumn = _ref2.scrollToColumn,
          scrollToRow = _ref2.scrollToRow;
      var onScrollToChange = this.props.onScrollToChange;
      onScrollToChange({
        scrollToColumn: scrollToColumn,
        scrollToRow: scrollToRow
      });
      this.setState({
        scrollToColumn: scrollToColumn,
        scrollToRow: scrollToRow,
        focusOnRender: true
      });
    }
    /**
     * Renders the HOC
     *
     * @private
     * @inheritdoc
     * @return {void}
     */

  }, {
    key: "render",
    value: function render() {
      var _this$props2 = this.props,
          className = _this$props2.className,
          children = _this$props2.children;
      var _this$state4 = this.state,
          scrollToColumn = _this$state4.scrollToColumn,
          scrollToRow = _this$state4.scrollToRow,
          focusOnRender = _this$state4.focusOnRender;
      /* eslint-disable jsx-a11y/no-static-element-interactions */

      return React.createElement("div", {
        className: className,
        onKeyDown: this.onKeyDown
      }, children({
        onSectionRendered: this.onSectionRendered,
        scrollToColumn: scrollToColumn,
        scrollToRow: scrollToRow,
        focusOnRender: focusOnRender
      }));
      /* eslint-enable jsx-a11y/no-static-element-interactions */
    }
  }]);

  return KeyBinder;
}(PureComponent);

_defineProperty(KeyBinder, "defaultProps", {
  scrollToColumn: 0,
  scrollToRow: 0,
  onRename: noop,
  onShare: noop,
  onDownload: noop,
  onOpen: noop,
  onSelect: noop,
  onDelete: noop
});

export default KeyBinder;