slate-edit-table/dist/changes/moveSelectionBy.js

A Slate plugin to handle keyboard events in tables.

'use strict';

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

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"); } }; }();

require('slate');

var _utils = require('../utils');

/**
 * Move selection by a {x,y} relative movement
 */
function moveSelectionBy(opts, change, x, //  Move horizontally by x
y // Move vertically by y
) {
    var value = change.value;
    var startKey = value.startKey;

    var pos = _utils.TablePosition.create(opts, value.document, startKey);
    if (!pos.isInCell()) {
        throw new Error('moveSelectionBy can only be applied in a cell');
    }

    var rowIndex = pos.getRowIndex();
    var colIndex = pos.getColumnIndex();
    var width = pos.getWidth();
    var height = pos.getHeight();

    var _normPos = normPos(x + colIndex, y + rowIndex, width, height),
        _normPos2 = _slicedToArray(_normPos, 2),
        absX = _normPos2[0],
        absY = _normPos2[1];

    var isGoingUp = y < 0;

    if (absX === -1) {
        // Out of table
        return change;
    }

    var table = pos.table;

    var row = table.nodes.get(absY);
    var cell = row.nodes.get(absX);

    if (isGoingUp) {
        change.collapseToEndOf(cell);
    } else {
        change.collapseToStartOf(cell);
    }

    return change;
}

/**
 * Normalize position in a table. If x is out of the row, update y accordingly.
 * Returns [-1, -1] if the new selection is out of table
 */
function normPos(x, y, width, height) {
    if (x < 0) {
        x = width - 1;
        y -= 1;
    }

    if (y < 0) {
        return [-1, -1];
    }

    if (x >= width) {
        x = 0;
        y += 1;
    }

    if (y >= height) {
        return [-1, -1];
    }

    return [x, y];
}

exports.default = moveSelectionBy;