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https://github.com/streetwriters/notesnook.git
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205373dca3
This replaces DOMParser with htmlparser2 which is much, much faster. How much faster? 80%. This new implementation can parse at 50mb/s which is insane! The old one could only do 5-10mb/s We still haven't gotten rid of the DOMParser though since HTML-to-MD conversion still needs it. This will be done soon though by using `dr-sax`. This uses a custom implementation of htmlparser2 instead of the default one which is 50% faster.
72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
/*
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This file is part of the Notesnook project (https://notesnook.com/)
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Copyright (C) 2022 Streetwriters (Private) Limited
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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import { decodeHTML5 } from "entities";
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import { Parser } from "htmlparser2";
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export const parseHTML = (input) =>
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new globalThis.DOMParser().parseFromString(
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wrapIntoHTMLDocument(input),
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"text/html"
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);
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export function getDummyDocument() {
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const doc = parseHTML("<div></div>");
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return doc;
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}
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export function getInnerText(element) {
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return decodeHTML5(element.innerText || element.textContent);
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}
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function wrapIntoHTMLDocument(input) {
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if (typeof input !== "string") return input;
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if (input.includes("<body>")) return input;
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return `<!doctype html><html lang="en"><head><title>Document Fragment</title></head><body>${input}</body></html>`;
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}
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export function extractFirstParagraph(html) {
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let text = "";
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let start = false;
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const parser = new Parser(
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{
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onopentag: (name) => {
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if (name === "p") start = true;
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},
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onclosetag: (name) => {
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if (name === "p") {
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start = false;
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parser.pause();
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parser.reset();
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}
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},
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ontext: (data) => {
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if (start) text += data;
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}
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},
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{
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lowerCaseTags: false,
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decodeEntities: true
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}
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);
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parser.end(html);
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return text;
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}
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