63 lines
1.7 KiB
JavaScript
63 lines
1.7 KiB
JavaScript
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/*
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* MIT License http://opensource.org/licenses/MIT
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* Author: Ben Holloway @bholloway
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*/
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'use strict';
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/**
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* Given a sourcemap position create a new maybeObject with only line and column properties.
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*
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* @param {*|{line: number, column: number}} maybeObj Possible location hash
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* @returns {{line: number, column: number}} Location hash with possible NaN values
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*/
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function sanitise(maybeObj) {
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var obj = !!maybeObj && typeof maybeObj === 'object' && maybeObj || {};
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return {
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line: isNaN(obj.line) ? NaN : obj.line,
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column: isNaN(obj.column) ? NaN : obj.column
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};
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}
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exports.sanitise = sanitise;
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/**
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* Infer a line and position delta based on the linebreaks in the given string.
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*
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* @param candidate {string} A string with possible linebreaks
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* @returns {{line: number, column: number}} A position object where line and column are deltas
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*/
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function strToOffset(candidate) {
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var split = candidate.split(/\r\n|\n/g);
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var last = split[split.length - 1];
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return {
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line: split.length - 1,
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column: last.length
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};
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}
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exports.strToOffset = strToOffset;
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/**
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* Add together a list of position elements.
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*
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* Lines are added. If the new line is zero the column is added otherwise it is overwritten.
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*
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* @param {{line: number, column: number}[]} list One or more sourcemap position elements to add
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* @returns {{line: number, column: number}} Resultant position element
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*/
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function add(list) {
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return list
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.slice(1)
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.reduce(
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function (accumulator, element) {
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return {
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line: accumulator.line + element.line,
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column: element.line > 0 ? element.column : accumulator.column + element.column,
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};
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},
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list[0]
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);
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}
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exports.add = add;
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