mathpix-markdown-it/lib/markdown/md-svg-to-base64/base64.js

Mathpix-markdown-it is an open source implementation of the mathpix-markdown spec written in Typescript. It relies on the following open source libraries: MathJax v3 (to render math with SVGs), markdown-it (for standard Markdown parsing)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var Base64 = {
    characters: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
    encode: function (input) {
        var output = '';
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;
        input = Base64.utf8Encode(input);
        while (i < input.length) {
            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);
            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;
            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            }
            else if (isNaN(chr3)) {
                enc4 = 64;
            }
            output =
                output +
                    this.characters.charAt(enc1) +
                    this.characters.charAt(enc2) +
                    this.characters.charAt(enc3) +
                    this.characters.charAt(enc4);
        }
        return output;
    },
    utf8Encode: function (string) {
        string = string.replace(/\r\n/g, '\n');
        var utftext = '';
        for (var n = 0; n < string.length; n++) {
            var c = string.charCodeAt(n);
            if (c < 128) {
                utftext += String.fromCharCode(c);
            }
            else if (c > 127 && c < 2048) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            }
            else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }
        }
        return utftext;
    }
};
exports.default = Base64;
//# sourceMappingURL=base64.js.map