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translate-richtext.js
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translate-richtext.js
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#!/usr/bin/env node
// FIXME nodeTypeId is not stable
// https://github.com/tree-sitter/py-tree-sitter/issues/202
// py-tree-sitter is 10x slower than lezer-parser
//throw new Error("TODO update node ids of @lezer/html from version 1.3.6 to 1.3.9")
// based on src/alchi-book/scripts/translate.js
// TODO in exportLang, remove lang="en" from outputTemplateHtml
// when targetLang == "en"
// only keep <html lang="en">
// also remove (lang="en") from comments: <!--(lang="en") ... -->
// TODO add lang="de" to untranslated parts
// example:
// <span class="note">predictions<span style="display:none">
// TODO 16personalities macht Vorhersagen zur Kompatibilität
// </span></span>
// the annotation was not translated
// it had no explicit lang="de" attribute
// but it inherited lang from <html lang="de">
// FIXME to get the "joined" translations
// we have to send full sentences to the translator
// so we cannot remove "already translated" parts of sentences
// example:
// This is some sentence with <b>some already translated words</b>, you see?
// if the part "some already translated words" has already been translated
// and is already stored in the the translations database
// then we can only remove it from the source text for the "splitted" translation
// but not from the source text for the "joined" translation
/*
TODO remove empty <span> tags that were used only for lang="..."
<div lang="en" class="para">
Fuck the system! <span lang="de">Aber diesmal richtig.</span>
</div>
*/
// FIXME keep lang="..." of notranslate tags if sourceLang != targetLang
/*
<span lang="latin" class="notranslate">Si vis pacem, para bellum.</span>
<span lang="fr" class="notranslate">Laisse faire, la nature.</span>
*/
// TODO update existing translated documents
// TODO render a side-by-side view of source and translated text
// with aligned text parts
// TODO add "translation based on ..." info to the output html
// something like
// <meta name="translation-based-on-file-name" value="input.html" class="notranslate">
// <meta name="translation-based-on-git-blob" value="6183d1520516dfeb3ec3c77ec8248a7599d3e67d" class="notranslate">
// then the original file can be produced with
// git cat-file blob 6183d1520516dfeb3ec3c77ec8248a7599d3e67d
// TODO add "translated license" to non-english translations
// https://github.com/milahu/mit-license
// TODO autofix: "i.e." -> "in effect,"
// TODO autofix: "cannot" -> "can not"
// TODO test the "v2 beta" version of argos-translate
/*
cd ~/src/milahu/nur-packages
nix-build . -A python3Packages.argostranslate_2
PYTHONPATH=$PYTHONPATH:/nix/store/jinijfbh62d55bzzy9476wrgnglgr571-python3.10-argostranslate-2.alpha/lib/python3.10/site-packages
*/
// warning: this code is a horrible mess
// ideally i would do a rewrite from scratch
// but i dont have the time...
// write errors to stdout to keep stdout and stderr in sync
console.error = console.log;
const debugAlignment = false;
const translateComments = false;
const translateTitleAttr = false;
const translateMetaContent = true;
//const sleepBetweenTranslationRequests = 10 * 1000;
/*
// https://stackoverflow.com/a/39914235/10440128
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
*/
// see also
// https://webapps.stackexchange.com/questions/52668/prohibit-the-translation-of-pieces-of-text-in-google-translate/154694#154694
// https://github.com/ssut/py-googletrans/issues/99#issuecomment-848714972
// alternatives
// https://github.com/Frully/html-google-translate
// based on https://github.com/Frully/google-translate-open-api
// Free and unlimited
// (translate.google.com uses a token to authorize the requests.
// If you are not Google, you do not have this token
// and will have to pay $20 per 1 million characters of text)
// TODO translate svg files
// TODO refactor src/pages/*.html to use <lang.de> instead of <de> etc. -> make tags unambiguous
// e.g. <tr> can be turkish or table row
// TODO avoid double inserts
// TODO verify: all text-fragments are inserted
// TODO auto-detect sourceLangList from files in src/pages/*.html
// TODO post-process old and manual translations
// -> add/update rev="en#xxxxxxxx" (revision ID) to keep translations in sync
// use different encoding than base64? base32 or base16 (hex) -> better for filenames
// -> easier to build a content-addressable store to cache old versions
// con: text fragments are small -> use one large database file, e.g. jsonlines format
// collision safety? git uses short IDs of only 7 chars in base16
// FIXME [-{_>] can be translated to [-{_}]
// example: translations-store/de-en-sha1-7f77643ee85951e4b66d0b9656afaa78061d9898.translation.txt.broken-code
// input: input.html.sha1-6b994e5f12c80d8ffcb4a9722cd51460a39a1f96.groups.json
// for now, im manually fixing the translation.txt file
// based on the sequence of codes in the input files
// TODO maybe automate this fixing
// see "wild guess: the translator translated our code"
// TODO show context of the broken code: source versus translation
// TODO use unicode symbols instead of ascii codes?
// these should be non-text symbols, so they are not translated
// FIXME [_-_{] can be translated to [_-_-]
// translations-store/de-en-sha1-5d2fca6fd68c766edca573ca3abedcc6e23abab6.translation.txt.broken-code
// FIXME [</^<] can be translated to [</^ ^<]
// translations-store/de-en-sha1-01144fcc0bfa61f74471d152eed40852e072c780.translation.txt.broken-code
// FIXME ['-'^}] can be translated to ['-'^] ... }]
// es sind ja im Internet sämtliche ['-'^/] ['-'^_] Lehrpläne ['-'^{] ['-'^}] zugänglich
// there are all ['-'^/] ['-'^_] curricula ['-'^{] ['-'^] on the Internet }] accessible
// FIXME ['-</}] can be translated to ['-</{}]
// Bevor sie mich holten, wusste ich, sie würden kommen, ['-</}] jetzt sitze ich im Knast und werd jeden Tag vernommen.
// Before they took me, I knew they were coming, ['-</{}] now I'm in jail and being questioned every day.
// 12 safe symbols: []^'*-/_{}<>
// ascii codes
/*
const codeNumKey = "^'*-/_{}<>"; // 10 digits -> base 10 code
const codeNumRegexCharClass = "\\^'*-/_{}<>"; // escape ^ for regex character class
*/
// unicode codes
// also unicode codes are broken by google translate
// [☢☥] is replaced with [☢☤]
// error: duplicate replaceId 8740
// { _replacement: '[☢☤]', idxStr: '☢☤', replaceId: 8740, rest: '' }
// couldn't remember anything at all, [☢☡] except for the [☢☢] [☢☣] veracity of his claims [☢☤] [☢☤] [ ☢☥] . [☢☦] [☢☧] I stood there rigid many a time. [☢☨] [☢☩] You didn't know what to admire more, [☢☪] her eloquence or her art of [☢☫] [☢☬] lying [☢☭] [☢☮] .
// bewiesene [☢☢] [☢☣] Richtigkeit seiner Behauptungen [☢☤] [☢☥] . [☢☦] [☢☧] Ich stand manches Mal starr da. [☢☨] [☢☩] Man wußte nicht, was man mehr best
// TODO use single char unicode codes
// -> no, is also broken
// also broken: verbose ascii code `ref${num}`;
// [\"ref2663\"] also wenn sein Subtyp stabilere Bindungen zum gleichen Geschlecht hat, [\"ref2664\"] dann hat dieser Mensch auch \"heterosexuelle\" Bindungen (zum anderen Geschlecht), [\"ref2665\"] aber diese Bindungen sind eher labil (weniger stabil, seltener).
// ["ref2663"] i.e. if his subtype has more stable ties to the same sex, ["ref2664"] then this person also has "heterosexual" ties (to the opposite sex), ["ref2662"] "ref2665"] but these bonds are rather unstable (less stable, less common). ["ref2666"]
// translator can remove sentences
// missing refs: ref8383 ref8384 ref8385
// removed sentence: Die Missgeburt vom Jugendamt wird sich eine Kugel fangen
// but the translator works on this small text:
/*
Ich rasiere mein Äffchen und lass es anschaffen, [\"ref8380\"]
tret so lange auf dein Kopf, bis vier und drei acht machen. [\"ref8381\"] [\"ref8382\"]
Die Missgeburt vom Jugendamt wird sich eine Kugel fangen [\"ref8383\"] [\"ref8384\"] , [\"ref8385\"]
meine Eltern sind seit neun Jahren im Urlaub, Mann. [\"ref8386\"]
*/
/*
I'll shave my little monkey and have it done, ["ref8380"]
step on your head until four and three make eight.
My parents have been on vacation for nine years, man. ["ref8386"]
*/
// so... was the sentence removed because the translator is stupid or evil?
//const codeNumRegexCharClass = "\\u2600-\\u26FF";
// verbose ascii code `ref${num}`;
// "ref" as in "reference". this should look like a footnote-reference
const codeNumRegexCharClass = "0-9";
// FIXME translator removes unicode codes
// [⚪] [⚫] Ob und wie die Diagonal-Paare funktionieren, [⚬] weiss ich noch nicht. Diagonal-Paare: MS-FL und FS-ML. [⚭] [⚮]
// [⚪] [⚫] I don't yet know whether and how the diagonal pairs work. Diagonal pairs: MS-FL and FS-ML. [⚭] [⚮]
// warning: unsteady replaceIdRaw: 171 -> 173 = code: ⚫ -> ⚭
// -> [⚬] was removed, this is bad...
// we need codes that are ALWAYS preserved by the translator
// this looks better:
// [⚪] [⚫] ["ref6"] Ob ["ref7"] und ["ref8"] wie ["ref9"] die ["ref10"] Diagonal-Paare ["ref11"] funktionieren ["ref12"], ["ref1"] weiss ["ref2"] ich ["ref3"] noch ["ref4"] nicht ["ref5"]. ["ref13"] Diagonal-Paare ["ref14"]: MS-FL und FS-ML. ["ref15"] [⚭] [⚮]
// [⚪] [⚫] ["ref6"] Whether ["ref7"] and ["ref8"] work like ["ref9"] the ["ref10"] diagonal pairs ["ref11"] ["ref12"], ["ref1"] don't know ["ref2"] I ["ref3"] nor ["ref4"] ["ref5"]. ["ref13"] Diagonal pairs ["ref14"]: MS-FL and FS-ML. ["ref15"] [⚭] [⚮]
const removeRegexCharClass = [
'\u200B', // ZERO WIDTH SPACE from google https://stackoverflow.com/questions/36744793
].join('');
const artifactsRegexCharClass = removeRegexCharClass + [
' ', // space
// this is valid source text: […] = [...]
//'…', // 8230
].join('');
// "import" because this is used only in importLang
// where we have to deal with errors introduced by the translate service
const codeNumRegexCharClassImport = codeNumRegexCharClass + artifactsRegexCharClass;
// no. valid replacementId are all integers >= 0
// expected range: 9728 to 9983
/*
function isValidReplacementId(num) {
return (9728 <= num && num <= 9983);
}
*/
// ascii codes
//const encodeNumTable = Object.fromEntries(codeNumKey.split('').map((c, i) => [i, c]));
function encodeNum(num) {
// verbose ascii code `ref${num}`;
return `ref${num}`;
// ascii codes
//return num.toString().split('').map(i => encodeNumTable[i]).join('');
// unicode codes
// https://stackoverflow.com/questions/12746278/generate-a-list-of-unicode-characters-in-a-for-loop
// String.fromCharCode(9728)
// String.fromCharCode(9983)
// https://stackoverflow.com/questions/43150498/how-to-get-all-unicode-characters-from-specific-categories
// https://stackoverflow.com/questions/1337419/how-do-you-convert-numbers-between-different-bases-in-javascript
// https://en.wikipedia.org/wiki/Miscellaneous_Symbols
// 9728 = https://unicode-explorer.com/c/2600
// 9728 + 255 = https://unicode-explorer.com/c/26FF
// FIXME some codes are not translated @ single char unicode codes
// expected range: 9728 to 9983
// [♑] = 9809
// [♳] = 9843
// [☯]
// [♎]
// [♹]
// [☧]
// single char unicode codes
const outputBase = 256;
const digit = num % outputBase;
return String.fromCharCode(9728 + digit);
// convert base 10 to base 256
/*
const outputBase = 256;
let result = [];
do {
const digit = num % outputBase;
//const char = keys[digit];
const char = String.fromCharCode(9728 + digit);
result.push(char);
num = Math.trunc(num / outputBase);
} while (num != 0);
return result.reverse().join("");
*/
//return String.fromCharCode(9728 + (num % 256));
}
let decodeNumOffest = 0;
let decodeNumLastResult = 0;
// ascii codes
//const decodeNumTable = Object.fromEntries(codeNumKey.split('').map((c, i) => [c, i]));
function decodeNum(str) {
//const numStr = str.replace(/\s+/sg, '').split('').map(c => decodeNumTable[c]).join('');
// TODO also remove unicode spaces
let numStr = str.replace(/\s+/sg, '');
// verbose ascii code `ref${num}`;
if (!numStr.match(/^ref[0-9]+$/)) {
throw new Error(`decodeNum: invalid str: ${JSON.stringify(str)}`);
}
numStr = numStr.slice(4, -1);
return parseInt(numStr);
// unicode codes
/*
const inputBase = 256;
//if (!numStr.match(/^[0-9]+$/)) {
if (!numStr.match(/^[\u2600-\u26ff]+$/)) {
throw new Error(`decodeNum: invalid str: ${JSON.stringify(str)}`);
}
const chars = numStr.split('');
if (chars.length != 1) {
throw new Error(`decodeNum: invalid str length: ${JSON.stringify(str)}`);
}
const char = chars[0];
// 0 <= digit <= 255
const digit = char.charCodeAt(0) - 9728;
let result = decodeNumOffest + digit;
if (result < (decodeNumLastResult - inputBase/2)) {
// overflow
result += inputBase;
decodeNumOffest += inputBase;
}
decodeNumLastResult = result;
return result;
*/
}
/*
// unicode
function decodeNumRaw(str) {
const numStr = str.replace(/\s+/sg, '');
if (!numStr.match(/^[\u2600-\u26ff]+$/u)) {
throw new Error(`decodeNum: invalid str: ${JSON.stringify(str)}`);
}
const chars = numStr.split('');
if (chars.length != 1) {
throw new Error(`decodeNum: invalid str length: ${JSON.stringify(str)}`);
}
const char = chars[0];
// 0 <= digit <= 255
const digit = char.charCodeAt(0) - 9728;
return digit;
}
*/
/*
// ok
// test
console.log(`testing encodeNum and decodeNum ...`)
// reset state of decodeNum
decodeNumOffest = 0;
decodeNumLastResult = 0;
for (let num = 0; num < 255*255*10; num++) {
const code = encodeNum(num);
const numActual = decodeNum(code);
if (num != numActual) {
console.error(`encodeNum or decodeNum failed: num=${num} code=${JSON.stringify(code)} numActual=${numActual}`)
process.exit(1);
}
}
// ok
console.log(`testing encodeNum and decodeNum done`)
// reset state of decodeNum
decodeNumOffest = 0;
decodeNumLastResult = 0;
for (const num of [0, 256-1, 256, 2*256-1, 2*256, 3*256-1, 3*256, 4*256-1, 4*256]) {
const code = encodeNum(num);
const numActual = decodeNum(code);
console.log(`encodeNum(${num}) == ${JSON.stringify(code)} decodeNum(${JSON.stringify(code)}) == ${numActual}`)
}
// reset state of decodeNum
decodeNumOffest = 0;
decodeNumLastResult = 0;
process.exit(0);
*/
const dryRunExport = 0;
const dryRunImport = 0;
const showDebug = 0;
//const showDebug = 1;
const charLimit = 5000; // limit of google, deepl
//const charLimit = 1000; // good page size for manual translations or debugging
//const charLimit = 1500; // deepl without login
// deepl rate limit: 4 requests, each 5000 chars
// Want to keep translating? Try DeepL Pro for free.
// You’ve reached your free usage limit.
// You can use the free version of DeepL again in 24 hours
// or try DeepL Pro to translate now and get premium features.
let useXml = false;
let translatorName = 'google';
//let translatorName = 'deepl';
const previewTextLength = 500;
/*
const fs = require('fs');
const path = require('path');
//const appRoot = require('app-root-path').path;
const glob = require('fast-glob');
// https://github.com/taoqf/node-html-parser
// https://github.com/taoqf/node-html-parser/pull/253
const { parse: parseHtml } = require('node-html-parser');
const htmlEntities = require('he');
// TODO
// google translate client
// https://github.com/thedaviddelta/lingva-scraper
const LingvaScraper = require('lingva-scraper');
// https://github.com/chge/tasty-treewalker
// https://stackoverflow.com/questions/39309351/dom-tree-walker-as-an-exercisejs
const tastyTreewalker = require('tasty-treewalker');
const crypto = require("crypto");
*/
import fs from 'fs';
import path from 'path';
import crypto from 'crypto';
import child_process from 'child_process';
//import { parse as parseHtml } from 'node-html-parser'; // TODO remove
//import * as htmlparser2 from "htmlparser2";
// concrete syntax tree parser for html
// https://github.com/lezer-parser/html
import { parser as lezerParserHtml } from '@lezer/html';
// https://github.com/milahu/nix-eval-js
// https://github.com/milahu/lezer-parser-nix
import { formatErrorContext } from './format-error-context.js';
import glob from 'fast-glob';
import htmlEntities from 'he';
//import LingvaScraper from 'lingva-scraper';
import { todo } from 'node:test'; // TODO what?
//console.log("htmlEntities.encode", htmlEntities.encode("&<>'\"")); process.exit()
// no, this is a polyfill for the browser
//import tastyTreewalker from 'tasty-treewalker';
// no. broken
//import HTMLtoDOCX from "html-to-docx";
//const elevConf = require(appRoot + '/config/eleventy.config.js')();
//process.chdir(appRoot);
//const scriptPath = path.relative(appRoot, process.argv[1]);
//const inputDir = elevConf.dir.input;
//const infilesGlob = inputDir + '/pages/'+'*.html';
//const infilesGlob = 'input.html';
const infilesGlob = '';
//const sourceLangList = ['de', 'en']; // TODO get from 11ty metadata
async function main() {
const argv = process.argv.slice(1); // argv[0] is node
const langMap = {
zh: 'zh-CN', // simplified chinese
};
function getLang(str) {
if (str && str in langMap) return langMap[str];
return str;
}
// run this script from alchi/src/whoaremyfriends/
//const inputPath = 'input.html';
const inputPath = argv[1];
const targetLang = getLang(argv[2]);
const translationsPathList = argv.slice(3);
if (!inputPath || !targetLang) {
console.error(`error: missing arguments`);
console.error(`usage:`);
console.error(`# step 1: export text parts to a html file with links to translator`);
console.error(`node translate-richtext.js input.html en`);
console.error(`# step 2: import the translated text parts from a text file`);
console.error(`node translate-richtext.js input.html en translations.txt`);
return 1;
}
if (translationsPathList.length > 0) {
return await importLang(inputPath, targetLang, translationsPathList);
}
else {
return await exportLang(inputPath, targetLang);
}
}
async function exportLang(inputPath, targetLang) {
const inputHtml = fs.readFileSync(inputPath, 'utf8');
// no. HTMLtoDOCX is broken: TypeError: Cannot read properties of undefined (reading 'colSpan')
/*
const headerHTMLString = null;
const footerHTMLString = null;
const documentOptions = {
table: { row: { cantSplit: true } },
footer: false,
pageNumber: false,
};
const docxBuffer = await HTMLtoDOCX(inputHtml, headerHTMLString, documentOptions, footerHTMLString);
const docxPath = inputPath + ".src.docx";
fs.writeFileSync(docxPath, docxBuffer);
console.log(`done ${docxPath}`);
return 0;
*/
// .slice(0, 50*1000);
//const inputHtml = "<?xml a=\"b\"?><!doctype html><div id=\"asdf\" lang='foo'><a href=\"#\"><!-- my comment --></a></div>";
// debug...
// parse error
// - <a class="nofootnote" href="https://www.youtube.com/watch?v=Cm_O97phbec&t=4566"
// + <a class="nofootnote" href="https://www.youtube.com/watch?v=Cm_O97phbec&t=4566"t=4566"
// fixed by ignoring InvalidEntity
/*
const inputHtml = `
<div>
— Ken Jebsen im
<a class="nofootnote" href="https://www.youtube.com/watch?v=Cm_O97phbec&t=4566"
>100% Realtalk Podcast #72</a>
</div>
`
*/
/*
const inputHtml = `
<div>
— Ken Jebsen im
<a class="nofootnote" href="https://www.youtube.com/watch?v=Cm_O97phbec&t=4566&foo"
>100% Realtalk Podcast #72</a>
</div>
`
*/
/*
const inputHtml = `
<html lang="de">
<head>
<title>asdf</title>
<meta name="description" content="what">
<meta name="author" content="who">
</head>
</html>
`
*/
// fixed in https://github.com/lezer-parser/html/pull/11
/*
console.error(`debug: position 50119+-5:\n-------------------------\n` + inputHtml.slice(50119 - 5, 50119 + 5) + '\n-------------------------')
console.error(`debug: position 50119+-10:\n-------------------------\n` + inputHtml.slice(50119 - 10, 50119 + 10) + '\n-------------------------')
console.error(`debug: position 50119+-20:\n-------------------------\n` + inputHtml.slice(50119 - 20, 50119 + 20) + '\n-------------------------')
console.error(`debug: position 50119+-50:\n-------------------------\n` + inputHtml.slice(50119 - 50, 50119 + 50) + '\n-------------------------')
//console.error(`debug: position 50119+-100:\n-------------------------\n` + inputHtml.slice(50119 - 100, 50119 + 100) + '\n-------------------------')
*/
// node 5 = SelfClosingEndTag : "/>" : "/>"
//const inputHtml = "<img><br/>";
// freeze the input for later
const inputHtmlHash = 'sha1-' + sha1sum(inputHtml);
const inputPathFrozen = inputPath + '.' + inputHtmlHash;
console.error(`writing ${inputPathFrozen}`);
fs.writeFileSync(inputPathFrozen, inputHtml, 'utf8');
//const translationsDatabaseJsonPath = 'translations-database.json';
// TODO add sourceLang and targetLang to the file name
//const translationsDatabaseHtmlPath = 'translations-database.html';
// TODO add other translators: argos translate, deepl translator
//const translationsDatabaseHtmlPathGlob = 'translations-database-*.html';
const translationsDatabaseHtmlPathGlob = 'translations-google-database-*-*.html';
const translationsDatabase = {};
// parse translation databases
for (const translationsDatabaseHtmlPath of glob.sync(translationsDatabaseHtmlPathGlob)) {
console.log(`reading ${translationsDatabaseHtmlPath}`)
const sizeBefore = Object.keys(translationsDatabase).length;
parseTranslationsDatabase(translationsDatabase, fs.readFileSync(translationsDatabaseHtmlPath, 'utf8'));
const sizeAfter = Object.keys(translationsDatabase).length;
console.log(`loaded ${sizeAfter - sizeBefore} translations from ${translationsDatabaseHtmlPath}`)
}
// debug
/*
for (const key of Object.keys(translationsDatabase).slice(0, 10)) {
console.log(`1010: translationsDatabase[${key}] = ${translationsDatabase[key]}`);
}
*/
// note: lezer-parser is a CONCRETE syntax tree parser == CST parser
const htmlParser = lezerParserHtml.configure({
// https://lezer.codemirror.net/docs/ref/#lr.ParserConfig
// https://github.com/lezer-parser/html/blob/main/src/html.grammar
// FIXME strict lezer-parser fails on large inputs. SyntaxError: No parse at 50119
// TODO what is position 50119?
//strict: true, // throw on parse error
// fixed. dialect selfClosing is not working - parse error at SelfClosingEndTag
// https://github.com/lezer-parser/html/issues/13
// parse "/>" as SelfClosingEndTag
// parse ">" as EndTag
//dialect: "selfClosing",
// TODO? dialect noMatch
});
let htmlTree;
// parse input html
try {
htmlTree = htmlParser.parse(inputHtml);
}
catch (error) {
// https://github.com/lezer-parser/lr/blob/main/src/parse.ts#L300
if (error.message.startsWith("No parse at ")) {
// note: pos is the character position, not the byte position
const pos = parseInt(error.message.slice("No parse at ".length));
error.message += '\n\n' + formatErrorContext(inputHtml, pos);
}
throw error;
}
const rootNode = htmlTree.topNode;
//console.log(tree);
// https://codereview.stackexchange.com/a/97886/205605
// based on nix-eval-js/src/lezer-parser-nix/src/nix-format.js
/** @param {Tree | TreeNode} tree */
function walkHtmlTree(tree, func) {
const cursor = tree.cursor();
//if (!cursor) return '';
if (!cursor) return;
let depth = 0;
while (true) {
// NLR: Node, Left, Right
// Node
// NOTE InvalidEntity breaks the parser
// <a t="a&b&c">a&b&c</a>
// -> require valid input, throw on parse error
const cursorTypeId = cursor.type.id;
if (
//true || // debug: dont filter
!(
cursorTypeId == 15 || // Document
cursorTypeId == 20 || // Element
cursorTypeId == 23 || // Attribute
cursorTypeId == 21 || // OpenTag <script>
cursorTypeId == 30 || // OpenTag <style>
cursorTypeId == 36 || // OpenTag
cursorTypeId == 32 || // CloseTag </style>
cursorTypeId == 29 || // CloseTag </script>
cursorTypeId == 37 || // CloseTag
cursorTypeId == 38 || // SelfClosingTag
// note: this is inconsistent in the parser
// InvalidEntity is child node
// EntityReference is separate node (sibling of other text nodes)
cursorTypeId == 19 || // InvalidEntity: <a href="?a=1&b=2" -> "&" is parsed as InvalidEntity
//cursorTypeId == 17 || // EntityReference: "&" or "—" is parsed as EntityReference
false
)
) {
func(cursor)
}
// Left
if (cursor.firstChild()) {
// moved down
depth++;
continue;
}
// Right
if (depth > 0 && cursor.nextSibling()) {
// moved right
continue;
}
let continueMainLoop = false;
let firstUp = true;
while (cursor.parent()) {
// moved up
depth--;
if (depth <= 0) {
// when tree is a node, stop at the end of node
// == dont visit sibling or parent nodes
return;
}
if (cursor.nextSibling()) {
// moved up + right
continueMainLoop = true;
break;
}
firstUp = false;
}
if (continueMainLoop) continue;
break;
}
}
// note: always set this to zero before calling walkHtmlTree
let lastNodeTo = 0;
const debugPrintAst = false;
//const debugPrintAst = true;
// debug: print the AST
if (debugPrintAst) {
lastNodeTo = 0;
const maxLen = 30;
walkHtmlTree(rootNode, (node) => {
//const nodeSource = inputHtml.slice(lastNodeTo, node.to);
let nodeSource = JSON.stringify(inputHtml.slice(node.from, node.to));
let spaceNodeSource = JSON.stringify(inputHtml.slice(lastNodeTo, node.to));
if (nodeSource.length > maxLen) {
nodeSource = nodeSource.slice(0, maxLen);
}
if (spaceNodeSource.length > maxLen) {
spaceNodeSource = spaceNodeSource.slice(0, maxLen);
}
//console.log(`${node.from}: node ${node.type.id} = ${node.type.name}: ${nodeSource.length}: ${nodeSource.slice(0, 100)}...`)
//console.log(`${node.from}: node ${node.type.id} = ${node.type.name}: ${nodeSource.length}: ${JSON.stringify(nodeSource)}`)
//console.log(`${node.from}: node ${node.type.id} = ${node.type.name}: ${JSON.stringify(nodeSource)}`)
//console.log(`node ${node.type.id} = ${node.type.name}: ${JSON.stringify(nodeSource)}`)
// TODO better. wrap string in single quotes
// similar to python repr(...)
//const s = "'" + JSON.stringify(nodeSource).slice(1, -1).replace(/\\"/g, '"') + "'";
//const s = JSON.stringify(nodeSource).slice(0, 100);
console.log(`node ${String(node.type.id).padStart(2)} = ${node.type.name.padEnd(25)} : ${nodeSource.padEnd(maxLen)} : ${spaceNodeSource}`);
lastNodeTo = node.to;
});
return;
}
const checkParserLossless = false;
//const checkParserLossless = true;
if (checkParserLossless) {
// test the tree walker
// this test run should return
// the exact same string as the input string
// = lossless noop
let walkHtmlTreeTestResult = "";
lastNodeTo = 0;
walkHtmlTree(rootNode, (node) => {
const nodeSource = inputHtml.slice(lastNodeTo, node.to);
walkHtmlTreeTestResult += nodeSource;
lastNodeTo = node.to;
// debug: print the AST
//const s = JSON.stringify(nodeSource).slice(0, 100);
//console.log(`node ${node.type.id} = ${node.type.name}: ${s}`);
});
if (walkHtmlTreeTestResult != inputHtml) {
console.error('error: the tree walker is not lossless');
const inputPathFrozenError = inputPath + '.' + inputHtmlHash + '.error';
console.error(`writing ${inputPathFrozenError}`);
fs.writeFileSync(inputPathFrozenError, walkHtmlTreeTestResult, 'utf8');
console.error(`TODO: diff -u ${inputPathFrozen} ${inputPathFrozenError}`);
console.error(`TODO: fix the tree walker`);
process.exit(1);
}
console.error(`ok. the tree walker is lossless`);
walkHtmlTreeTestResult = "";
//return;
}
/*
let currentTagName = undefined;
*/
//function newTag(parent) {
function newTag() {
const tag = {
openSpace: null,
open: null,
nameSpace: null,
name: null,
attrs: [],
classList: [],
parent: null,
lang: null,
ol: null, // original language
// this tag (or a parent tag) has one of these attributes:
// class="... notranslate ..."
// style="... display:none ..."
notranslate: false,
hasTranslation: false, // tag has attribute: src-lang-id="en:some-id"
};
return tag;
}
lastNodeTo = 0;
let inNotranslateBlock = false;
let currentTag = undefined;
let attrName = undefined;
let attrNameSpace = "";
let attrIs = undefined;
let attrIsSpace = "";
let attrValueQuoted = undefined;
let attrValue = undefined;
let currentLang = undefined;
const textToTranslateList = [];
let outputTemplateHtml = "";
let tagPath = [];
let inStartTag = false;
let startTagNodes = [];
const htmlBetweenReplacementsList = [];
let lastReplacementEnd = 0;
let inAttributeValue = false;
// https://html.spec.whatwg.org/multipage/syntax.html#void-elements
const selfClosingTagNameSet = new Set([
"area", "base", "br", "col", "embed", "hr", "img",
"input", "link", "meta", "source", "track", "wbr"
]);
function isSelfClosingTagName(tagName) {
// note: this is case sensitive
// ideally this would use tagName.toLowerCase()
return selfClosingTagNameSet.has(tagName);
}
function trimNodeSource(str) {
return str.replace(/\s+/g, " ").trim();
}
function isSentenceTag(currentTag) {
// TODO nested tags? <li><a>asdf</a></li> should become "asdf."
return currentTag.name.match(/^(title|h[1-9]|div|li|td)$/) != null;
}
function nodeSourceIsEndOfSentence(nodeSource) {
return nodeSource.match(/[.!?]["]?\s*$/s) != null;
}
function shouldTranslateCurrentTag(currentTag, inNotranslateBlock, currentLang, targetLang) {
return (
inNotranslateBlock == false &&
currentTag.notranslate != true &&
// TODO remove. moved to currentTag.notranslate
//currentTag.hasTranslation == false &&
currentTag.lang != targetLang
// TODO remove. lang inheritance moved to newTag()
//currentLang != targetLang
);
}
function writeComment(...a) {
return;
const s = a.map(String).join(" ");
outputTemplateHtml += "\n<!-- " + s + " -->\n";
}
// walkHtmlTree rootNode
walkHtmlTree(rootNode, (node) => {
//console.log(node);
//console.log("node", node);
//console.log("node.name", node.type.name);
//console.log("node.type.name", node.type.name);
//console.log("node.type.id", node.type.id);
//console.log("node.from + to", node.from, node.to);
//console.log("node.rawTagName", node.rawTagName);
//console.log("node.toString", node.toString());
//const nodeSource = inputHtml.slice(node.from, node.to);
let nodeSource = inputHtml.slice(node.from, node.to);
let nodeSourceSpaceBefore = inputHtml.slice(lastNodeTo, node.from);
//console.log("nodeSource", nodeSource);
//console.log("nodeSource:", { lastNodeTo, nodeFrom: node.from, nodeTo: node.to, nodeSourceSpaceBefore, nodeSource });
// debug
false && console.log("node:", {
typeId: node.type.id,
typeName: node.type.name,
lastNodeTo,
nodeFrom: node.from,
nodeTo: node.to,
nodeSourceSpaceBefore,
nodeSource,
});
// validate nodeSourceSpaceBefore
if (nodeSourceSpaceBefore.match(/^\s*$/) == null) {
console.error((
`error: nodeSourceSpaceBefore must match the regex "\\s*". ` +
`hint: add "lastNodeTo = node.to;" before "return;"`
), {
lastNodeTo,
nodeFrom: node.from,
nodeTo: node.to,
nodeSourceSpaceBefore,
nodeSource,
nodeSourceContext: inputHtml.slice(node.from - 100, node.to + 100),
})
process.exit(1);
}
if (nodeSource == '<!-- <notranslate> -->') {
inNotranslateBlock = true;
outputTemplateHtml += `${nodeSourceSpaceBefore}${nodeSource}`;
lastNodeTo = node.to;
return;
}
else if (nodeSource == '<!-- </notranslate> -->') {
inNotranslateBlock = false;
outputTemplateHtml += `${nodeSourceSpaceBefore}${nodeSource}`;
lastNodeTo = node.to;
return;
}
const nodeTypeId = node.type.id;
const nodeTypeName = node.type.name;
/*
6 = StartTag: <
22 = TagName: html
24 = AttributeName: lang
25 = Is: =
26 = AttributeValue: "de"
4 = EndTag: >
*/
// start of open tag
// "<"
if (
nodeTypeName == "StartTag"
/*
nodeTypeId == 6 ||
nodeTypeId == 7 || // <script>
nodeTypeId == 10 || // <link>
false
*/
) {
if (
!(
nodeTypeId == 6 ||
nodeTypeId == 7 || // <script>
nodeTypeId == 8 || // <style>
nodeTypeId == 10 || // <link>
false
)