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@xysfe/memento-core

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record and replay the web

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var mementoCoreRecord=function(){"use strict"; /*! ***************************************************************************** Copyright (c) Microsoft Corporation. Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ***************************************************************************** */var e,t=function(){return(t=Object.assign||function(e){for(var t,n=1,o=arguments.length;n<o;n++)for(var r in t=arguments[n])Object.prototype.hasOwnProperty.call(t,r)&&(e[r]=t[r]);return e}).apply(this,arguments)};function n(e,t,n,o){return new(n||(n=Promise))((function(r,i){function a(e){try{s(o.next(e))}catch(e){i(e)}}function g(e){try{s(o.throw(e))}catch(e){i(e)}}function s(e){var t;e.done?r(e.value):(t=e.value,t instanceof n?t:new n((function(e){e(t)}))).then(a,g)}s((o=o.apply(e,t||[])).next())}))}function o(e,t){var n,o,r,i,a={label:0,sent:function(){if(1&r[0])throw r[1];return 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k.has(e.id)})),removes:n,adds:o,timestamp:r};(i.texts.length||i.attributes.length||i.removes.length||i.adds.length)&&s.emissionCallback(i)},this.processMutation=function(e){switch(e.type){case"characterData":var t=e.target.textContent;E(e.target,s.blockClass,s.blockElements)||t===e.oldValue||s.texts.push({value:t,node:e.target});break;case"attributes":if(t=e.target.getAttribute(e.attributeName),E(e.target,s.blockClass,s.blockElements)||t===e.oldValue)return;var n=s.attributes.find((function(t){return t.node===e.target}));n||(n={node:e.target,attributes:{}},s.attributes.push(n)),n.attributes[e.attributeName]=w(document,e.attributeName,t);var 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        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
        return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
        function verb(n) { return function (v) { return step([n, v]); }; }
        function step(op) {
            if (f) throw new TypeError("Generator is already executing.");
            while (_) try {
                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
                if (y = 0, t) op = [op[0] & 2, t.value];
                switch (op[0]) {
                    case 0: case 1: t = op; break;
                    case 4: _.label++; return { value: op[1], done: false };
                    case 5: _.label++; y = op[1]; op = [0]; continue;
                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
                    default:
                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
                        if (t[2]) _.ops.pop();
                        _.trys.pop(); continue;
                }
                op = body.call(thisArg, _);
            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
        }
    }

    /*
     * base64-arraybuffer 1.0.2 <https://github.com/niklasvh/base64-arraybuffer>
     * Copyright (c) 2022 Niklas von Hertzen <https://hertzen.com>
     * Released under MIT License
     */
    var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
    // Use a lookup table to find the index.
    var lookup = typeof Uint8Array === 'undefined' ? [] : new Uint8Array(256);
    for (var i = 0; i < chars.length; i++) {
        lookup[chars.charCodeAt(i)] = i;
    }
    var encode = function (arraybuffer) {
        var bytes = new Uint8Array(arraybuffer), i, len = bytes.length, base64 = '';
        for (i = 0; i < len; i += 3) {
            base64 += chars[bytes[i] >> 2];
            base64 += chars[((bytes[i] & 3) << 4) | (bytes[i + 1] >> 4)];
            base64 += chars[((bytes[i + 1] & 15) << 2) | (bytes[i + 2] >> 6)];
            base64 += chars[bytes[i + 2] & 63];
        }
        if (len % 3 === 2) {
            base64 = base64.substring(0, base64.length - 1) + '=';
        }
        else if (len % 3 === 1) {
            base64 = base64.substring(0, base64.length - 2) + '==';
        }
        return base64;
    };

    var lastBlobMap = new Map();
    var transparentBlobMap = new Map();
    function getTransparentBlobFor(width, height) {
        return __awaiter(this, void 0, Promise, function () {
            var id, offscreen, blob, arrayBuffer, base64;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        id = width + "-" + height;
                        if (transparentBlobMap.has(id))
                            return [2, transparentBlobMap.get(id)];
                        offscreen = new OffscreenCanvas(width, height);
                        offscreen.getContext('2d');
                        return [4, offscreen.convertToBlob()];
                    case 1:
                        blob = _a.sent();
                        return [4, blob.arrayBuffer()];
                    case 2:
                        arrayBuffer = _a.sent();
                        base64 = encode(arrayBuffer);
                        transparentBlobMap.set(id, base64);
                        return [2, base64];
                }
            });
        });
    }
    var worker = self;
    worker.onmessage = function (e) {
        return __awaiter(this, void 0, void 0, function () {
            var _a, id, bitmap, width, height, transparentBase64, offscreen, ctx, blob, type, arrayBuffer, base64, _b;
            return __generator(this, function (_c) {
                switch (_c.label) {
                    case 0:
                        if (!('OffscreenCanvas' in globalThis))
                            return [2, worker.postMessage({ id: e.data.id })];
                        _a = e.data, id = _a.id, bitmap = _a.bitmap, width = _a.width, height = _a.height;
                        transparentBase64 = getTransparentBlobFor(width, height);
                        offscreen = new OffscreenCanvas(width, height);
                        ctx = offscreen.getContext('2d');
                        ctx.drawImage(bitmap, 0, 0);
                        bitmap.close();
                        return [4, offscreen.convertToBlob()];
                    case 1:
                        blob = _c.sent();
                        type = blob.type;
                        return [4, blob.arrayBuffer()];
                    case 2:
                        arrayBuffer = _c.sent();
                        base64 = encode(arrayBuffer);
                        _b = !lastBlobMap.has(id);
                        if (!_b) return [3, 4];
                        return [4, transparentBase64];
                    case 3:
                        _b = (_c.sent()) === base64;
                        _c.label = 4;
                    case 4:
                        if (_b) {
                            lastBlobMap.set(id, base64);
                            return [2, worker.postMessage({ id: id })];
                        }
                        if (lastBlobMap.get(id) === base64)
                            return [2, worker.postMessage({ id: id })];
                        worker.postMessage({
                            id: id,
                            type: type,
                            base64: base64,
                            width: width,
                            height: height,
                        });
                        lastBlobMap.set(id, base64);
                        return [2];
                }
            });
        });
    };

})();

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