slate-edit-code/dist/LineAnchor.js

A Slate plugin to handle keyboard events in code blocks.

'use strict';

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; }; }();

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; }

var Immutable = require('immutable');
var getNewLine = require('./getNewLine');

/**
 * Default properties.
 */

var DEFAULTS = {
    // Index of the current line
    line: Number(0),

    // Offset in current line
    offset: Number(0)
};

var LineAnchor = function (_ref) {
    _inherits(LineAnchor, _ref);

    function LineAnchor() {
        _classCallCheck(this, LineAnchor);

        return _possibleConstructorReturn(this, Object.getPrototypeOf(LineAnchor).apply(this, arguments));
    }

    _createClass(LineAnchor, null, [{
        key: 'getForOffset',

        /**
         * Return an anchor of a cursor in a block as a {line,offset} object
         *
         * @param {String} text
         * @param {Number} offset
         * @param {String} sep?
         * @return {LineAnchor}
         */
        value: function getForOffset(text, offset, sep) {
            sep = sep || getNewLine(text);

            var lineIndex = 0;
            var nextLineIndex = 0;
            var lastLineIndex = 0;

            while (nextLineIndex >= 0 && nextLineIndex < offset) {
                lineIndex++;

                lastLineIndex = nextLineIndex;
                nextLineIndex = text.indexOf(sep, nextLineIndex + sep.length);
            }

            return new LineAnchor({
                line: lineIndex - 1,
                offset: offset - lastLineIndex
            });
        }
    }]);

    return LineAnchor;
}(new Immutable.Record(DEFAULTS));

module.exports = LineAnchor;