@wabarc/cairn/dist/css.js

Node package and CLI tool for saving web page as single HTML file

"use strict";
/*
 * Copyright 2023 Wayback Archiver. All rights reserved.
 * Use of this source code is governed by the MIT
 * license that can be found in the LICENSE file.
 */
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.css = void 0;
const utils_1 = require("./utils");
class CSS {
    process(style, baseURL) {
        return __awaiter(this, void 0, void 0, function* () {
            if (style === undefined || typeof style !== 'string') {
                return '';
            }
            const convert = (url, baseURL) => __awaiter(this, void 0, void 0, function* () {
                const assetURL = (0, utils_1.createAbsoluteURL)(url, baseURL);
                const data = yield (0, utils_1.convertToData)(assetURL);
                return data || '';
            });
            const regexp = /(?<=url\().*?(?=\))/gm;
            const matches = style.matchAll(regexp);
            const rules = new Map();
            for (const m of matches) {
                if (m !== null && m.length > 0) {
                    let resourceURL = m[0];
                    if (resourceURL.startsWith('data:')) {
                        continue;
                    }
                    resourceURL = resourceURL.replace(/['|"]/g, '').replace(/['|"]/g, '');
                    const data = yield convert(resourceURL, baseURL);
                    rules.set(resourceURL, Buffer.from(data).toString());
                }
            }
            for (const [url, data] of rules) {
                if (data.length > 0) {
                    const regex = url.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&');
                    style = style.replace(new RegExp(regex, 'g'), data);
                }
            }
            return style;
        });
    }
}
const css = new CSS();
exports.css = css;
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