3bc72ab274
* Remove pinning of eslint-plugin-markdown An issue affecting Node.js source has been fixed in eslint-plugin-markdown so we don't need to pin it to beta-4 anymore. Refs: https://github.com/eslint/eslint-plugin-markdown/issues/69 * Update eslint-plugin-markdown up to 1.0.0-beta.7 * Fix docs for eslint-plugin-markdown@1.0.0-beta.7 PR-URL: https://github.com/nodejs/node/pull/14047 Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Yuta Hiroto <hello@about-hiroppy.com> Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
102 lines
2.1 KiB
JavaScript
102 lines
2.1 KiB
JavaScript
/**
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* @author Titus Wormer
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* @copyright 2015 Titus Wormer
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* @license MIT
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* @module remark:parse:util:remove-indentation
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* @fileoverview Remove indentation.
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*/
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'use strict';
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/* Dependencies. */
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var trim = require('trim');
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var repeat = require('repeat-string');
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var getIndent = require('./get-indentation');
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/* Expose. */
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module.exports = indentation;
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/* Characters. */
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var C_SPACE = ' ';
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var C_NEWLINE = '\n';
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var C_TAB = '\t';
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/**
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* Remove the minimum indent from every line in `value`.
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* Supports both tab, spaced, and mixed indentation (as
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* well as possible).
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*
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* @example
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* removeIndentation(' foo'); // 'foo'
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* removeIndentation(' foo', 2); // ' foo'
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* removeIndentation('\tfoo', 2); // ' foo'
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* removeIndentation(' foo\n bar'); // ' foo\n bar'
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*
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* @param {string} value - Value to trim.
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* @param {number?} [maximum] - Maximum indentation
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* to remove.
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* @return {string} - Unindented `value`.
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*/
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function indentation(value, maximum) {
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var values = value.split(C_NEWLINE);
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var position = values.length + 1;
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var minIndent = Infinity;
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var matrix = [];
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var index;
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var indentation;
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var stops;
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var padding;
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values.unshift(repeat(C_SPACE, maximum) + '!');
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while (position--) {
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indentation = getIndent(values[position]);
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matrix[position] = indentation.stops;
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if (trim(values[position]).length === 0) {
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continue;
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}
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if (indentation.indent) {
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if (indentation.indent > 0 && indentation.indent < minIndent) {
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minIndent = indentation.indent;
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}
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} else {
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minIndent = Infinity;
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break;
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}
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}
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if (minIndent !== Infinity) {
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position = values.length;
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while (position--) {
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stops = matrix[position];
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index = minIndent;
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while (index && !(index in stops)) {
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index--;
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}
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if (
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trim(values[position]).length !== 0 &&
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minIndent &&
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index !== minIndent
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) {
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padding = C_TAB;
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} else {
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padding = '';
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}
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values[position] = padding + values[position].slice(
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index in stops ? stops[index] + 1 : 0
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);
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}
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}
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values.shift();
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return values.join(C_NEWLINE);
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}
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