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+WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
+EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
+OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
+KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
+LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
+THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
+AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
+FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR
+CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE
+LIBRARY (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
+RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
+FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
+SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+DAMAGES.
+
+ END OF TERMS AND CONDITIONS
+\f
+ How to Apply These Terms to Your New Libraries
+
+ If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change. You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+ To apply these terms, attach the following notices to the library. It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the library's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary. Here is a sample; alter the names:
+
+ Yoyodyne, Inc., hereby disclaims all copyright interest in the
+ library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+ <signature of Ty Coon>, 1 April 1990
+ Ty Coon, President of Vice
+
+That's all there is to it!
+++ /dev/null
-'use strict';
-
-const assert = require('assert');
-const Stream = require('stream');
-
-
-/*
- * This filter consumes a stream of characters and emits one string per line.
- */
-class LineSplitter extends Stream {
- constructor() {
- super();
- this.buffer = '';
- this.writable = true;
- }
-
- write(data) {
- const lines = (this.buffer + data).split(/\r\n|\n\r|\n|\r/);
- for (let i = 0; i < lines.length - 1; i++) {
- this.emit('data', lines[i]);
- }
- this.buffer = lines[lines.length - 1];
- return true;
- }
-
- end(data) {
- this.write(data || '');
- if (this.buffer) {
- this.emit('data', this.buffer);
- }
- this.emit('end');
- }
-}
-
-
-/*
- * This filter consumes lines and emits paragraph objects.
- */
-class ParagraphParser extends Stream {
- constructor() {
- super();
- this.blockIsLicenseBlock = false;
- this.writable = true;
- this.resetBlock(false);
- }
-
- write(data) {
- this.parseLine(data + '');
- return true;
- }
-
- end(data) {
- if (data)
- this.parseLine(data + '');
- this.flushParagraph();
- this.emit('end');
- }
-
- resetParagraph() {
- this.paragraphLineIndent = -1;
-
- this.paragraph = {
- li: '',
- inLicenseBlock: this.blockIsLicenseBlock,
- lines: []
- };
- }
-
- resetBlock(isLicenseBlock) {
- this.blockIsLicenseBlock = isLicenseBlock;
- this.blockHasCStyleComment = false;
- this.resetParagraph();
- }
-
- flushParagraph() {
- if (this.paragraph.lines.length || this.paragraph.li) {
- this.emit('data', this.paragraph);
- }
- this.resetParagraph();
- }
-
- parseLine(line) {
- // Strip trailing whitespace
- line = line.trimRight();
-
- // Detect block separator
- if (/^\s*(=|"){3,}\s*$/.test(line)) {
- this.flushParagraph();
- this.resetBlock(!this.blockIsLicenseBlock);
- return;
- }
-
- // Strip comments around block
- if (this.blockIsLicenseBlock) {
- if (!this.blockHasCStyleComment)
- this.blockHasCStyleComment = /^\s*(\/\*)/.test(line);
- if (this.blockHasCStyleComment) {
- const prev = line;
- line = line.replace(/^(\s*?)(?:\s?\*\/|\/\*\s|\s\*\s?)/, '$1');
- if (prev === line)
- line = line.replace(/^\s{2}/, '');
- if (/\*\//.test(prev))
- this.blockHasCStyleComment = false;
- } else {
- // Strip C++ and perl style comments.
- line = line.replace(/^(\s*)(?:\/\/\s?|#\s?)/, '$1');
- }
- }
-
- // Detect blank line (paragraph separator)
- if (!/\S/.test(line)) {
- this.flushParagraph();
- return;
- }
-
- // Detect separator "lines" within a block. These mark a paragraph break
- // and are stripped from the output.
- if (/^\s*[=*-]{5,}\s*$/.test(line)) {
- this.flushParagraph();
- return;
- }
-
- // Find out indentation level and the start of a lied or numbered list;
- const result = /^(\s*)(\d+\.|\*|-)?\s*/.exec(line);
- assert.ok(result);
- // The number of characters that will be stripped from the beginning of
- // the line.
- const lineStripLength = result[0].length;
- // The indentation size that will be used to detect indentation jumps.
- // Fudge by 1 space.
- const lineIndent = Math.floor(lineStripLength / 2) * 2;
- // The indentation level that will be exported
- const level = Math.floor(result[1].length / 2);
- // The list indicator that precedes the actual content, if any.
- const lineLi = result[2];
-
- // Flush the paragraph when there is a li or an indentation jump
- if (lineLi || (lineIndent !== this.paragraphLineIndent &&
- this.paragraphLineIndent !== -1)) {
- this.flushParagraph();
- this.paragraph.li = lineLi;
- }
-
- // Set the paragraph indent that we use to detect indentation jumps. When
- // we just detected a list indicator, wait
- // for the next line to arrive before setting this.
- if (!lineLi && this.paragraphLineIndent !== -1) {
- this.paragraphLineIndent = lineIndent;
- }
-
- // Set the output indent level if it has not been set yet.
- if (this.paragraph.level === undefined)
- this.paragraph.level = level;
-
- // Strip leading whitespace and li.
- line = line.slice(lineStripLength);
-
- if (line)
- this.paragraph.lines.push(line);
- }
-}
-
-
-/*
- * This filter consumes paragraph objects and emits modified paragraph objects.
- * The lines within the paragraph are unwrapped where appropriate. It also
- * replaces multiple consecutive whitespace characters by a single one.
- */
-class Unwrapper extends Stream {
- constructor() {
- super();
- this.writable = true;
- }
-
- write(paragraph) {
- const lines = paragraph.lines;
- const breakAfter = [];
- let i;
-
- for (i = 0; i < lines.length - 1; i++) {
- const line = lines[i];
-
- // When a line is really short, the line was probably kept separate for a
- // reason.
- if (line.length < 50) {
- // If the first word on the next line really didn't fit after the line,
- // it probably was just ordinary wrapping after all.
- const nextFirstWordLength = lines[i + 1].replace(/\s.*$/, '').length;
- if (line.length + nextFirstWordLength < 60) {
- breakAfter[i] = true;
- }
- }
- }
-
- for (i = 0; i < lines.length - 1;) {
- if (!breakAfter[i]) {
- lines[i] += ` ${lines.splice(i + 1, 1)[0]}`;
- } else {
- i++;
- }
- }
-
- for (i = 0; i < lines.length; i++) {
- // Replace multiple whitespace characters by a single one, and strip
- // trailing whitespace.
- lines[i] = lines[i].replace(/\s+/g, ' ').replace(/\s+$/, '');
- }
-
- this.emit('data', paragraph);
- }
-
- end(data) {
- if (data)
- this.write(data);
- this.emit('end');
- }
-}
-
-function rtfEscape(string) {
- function toHex(number, length) {
- return (~~number).toString(16).padStart(length, '0');
- }
-
- return string
- .replace(/[\\{}]/g, (m) => `\\${m}`)
- .replace(/\t/g, () => '\\tab ')
- // eslint-disable-next-line no-control-regex
- .replace(/[\x00-\x1f\x7f-\xff]/g, (m) => `\\'${toHex(m.charCodeAt(0), 2)}`)
- .replace(/\ufeff/g, '')
- .replace(/[\u0100-\uffff]/g, (m) => `\\u${toHex(m.charCodeAt(0), 4)}?`);
-}
-
-/*
- * This filter generates an rtf document from a stream of paragraph objects.
- */
-class RtfGenerator extends Stream {
- constructor() {
- super();
- this.didWriteAnything = false;
- this.writable = true;
- }
-
- write({ li, level, lines, inLicenseBlock: lic }) {
- if (!this.didWriteAnything) {
- this.emitHeader();
- this.didWriteAnything = true;
- }
-
- if (li)
- level++;
-
- let rtf = '\\pard\\sa150\\sl300\\slmult1';
- if (level > 0)
- rtf += `\\li${level * 240}`;
- if (li)
- rtf += `\\tx${level * 240}\\fi-240`;
- if (lic)
- rtf += '\\ri240';
- if (!lic)
- rtf += '\\b';
- if (li)
- rtf += ` ${li}\\tab`;
- rtf += ` ${lines.map(rtfEscape).join('\\line ')}`;
- if (!lic)
- rtf += '\\b0';
- rtf += '\\par\n';
-
- this.emit('data', rtf);
- }
-
- end(data) {
- if (data)
- this.write(data);
- if (this.didWriteAnything)
- this.emitFooter();
- this.emit('end');
- }
-
- emitHeader() {
- this.emit('data', '{\\rtf1\\ansi\\ansicpg1252\\uc1\\deff0\\deflang1033' +
- '{\\fonttbl{\\f0\\fswiss\\fcharset0 Tahoma;}}\\fs20\n' +
- '{\\*\\generator txt2rtf 0.0.1;}\n');
- }
-
- emitFooter() {
- this.emit('data', '}');
- }
-}
-
-
-const stdin = process.stdin;
-const stdout = process.stdout;
-const lineSplitter = new LineSplitter();
-const paragraphParser = new ParagraphParser();
-const unwrapper = new Unwrapper();
-const rtfGenerator = new RtfGenerator();
-
-stdin.setEncoding('utf-8');
-stdin.resume();
-
-stdin.pipe(lineSplitter);
-lineSplitter.pipe(paragraphParser);
-paragraphParser.pipe(unwrapper);
-unwrapper.pipe(rtfGenerator);
-rtfGenerator.pipe(stdout);