https://cdn.infourok.ru/assets/ai/helpers/pages/ai/streaming-message/markdown-65Hi-hg.js

1/// <reference path="./showdown.d.ts" />
2import showdown from "showdown";
3var LATEX_IMAGE_URL = "https://latex.infourok.ru/?";
4var HTML_ENTITY_PATTERN = RegExp("&(?:#\\d+|#x[0-9a-fA-F]+|[a-zA-Z][\\w:-]*);", "gu");
5var ESCAPED_BLOCKQUOTE_MARKERS_PATTERN = /(^|\n)([ \t]{0,3})(?:&gt;[ \t]?)+/g;
6var converter = null;
7var decodeEscapedEntitiesOneLevel = function(value) {
8    return value.replace(/&amp;(#\d+|#x[0-9a-fA-F]+|[a-zA-Z][\w:-]*);/g, "&$1;");
9};
10var decodeHTMLEntitiesOneLevel = function(value) {
11    if (!value.includes("&")) {
12        return value;
13    }
14    var textarea = document.createElement("textarea");
15    return value.replace(HTML_ENTITY_PATTERN, function(entity) {
16        textarea.innerHTML = entity;
17        return textarea.value;
18    });
19};
20var normalizeCodeEntities = function(html) {
21    if (!html.includes("&amp;")) {
22        return html;
23    }
24    var template = document.createElement("template");
25    template.innerHTML = html;
26    var codeNodes = template.content.querySelectorAll("code");
27    codeNodes.forEach(function(_, index) {
28        var codeNode = codeNodes[index];
29        var normalizedInnerHtml = decodeEscapedEntitiesOneLevel(codeNode.innerHTML);
30        codeNode.innerHTML = normalizedInnerHtml;
31    });
32    return template.innerHTML;
33};
34var wrapImagesWithLinks = function(html) {
35    if (!html.includes("<img")) {
36        return html;
37    }
38    var template = document.createElement("template");
39    template.innerHTML = html;
40    template.content.querySelectorAll("img").forEach(function(image) {
41        var imageUrl = image.getAttribute("src");
42        if (!imageUrl || image.closest("a")) {
43            return;
44        }
45        var link = document.createElement("a");
46        link.href = imageUrl;
47        link.target = "_blank";
48        link.rel = "noopener noreferrer";
49        image.replaceWith(link);
50        link.append(image);
51    });
52    return template.innerHTML;
53};
54var normalizeTaskListStyles = function(html) {
55    if (!html.includes("task-list-item")) {
56        return html;
57    }
58    var template = document.createElement("template");
59    template.innerHTML = html;
60    template.content.querySelectorAll("li.task-list-item").forEach(function(item) {
61        item.removeAttribute("style");
62    });
63    template.content.querySelectorAll('li.task-list-item input[type="checkbox"]').forEach(function(input) {
64        input.removeAttribute("style");
65    });
66    return template.innerHTML;
67};
68var encodeRFC3986URIComponent = function(value) {
69    return encodeURIComponent(value).replace(/[!'()*]/g, function(character) {
70        return "%".concat(character.charCodeAt(0).toString(16).toUpperCase());
71    });
72};
73var isCharacterEscaped = function(value, index) {
74    var backslashCount = 0;
75    for(var position = index - 1; position >= 0 && value[position] === "\\"; position -= 1){
76        backslashCount += 1;
77    }
78    return backslashCount % 2 === 1;
79};
80var unwrapLatexExpression = function(value) {
81    var depth = 0;
82    for(var i = 0; i < value.length; i += 1){
83        var char = value[i];
84        if ((char === "{" || char === "}") && !isCharacterEscaped(value, i)) {
85            depth += char === "{" ? 1 : -1;
86            if (depth === 0) {
87                return i === value.length - 1 ? value.slice(1, -1) : value;
88            }
89        }
90    }
91    return depth === 1 ? value.slice(1) : value;
92};
93var escapeUnescapedPercents = function(value) {
94    return value.replace(RegExp("%", "gu"), function(character, index) {
95        return isCharacterEscaped(value, index) ? character : "\\".concat(character);
96    });
97};
98var normalizeLatexExpression = function(wrapper, expression) {
99    var sourceExpression = decodeHTMLEntitiesOneLevel(expression);
100    var value = escapeUnescapedPercents(decodeHTMLEntitiesOneLevel(sourceExpression).trim());
101    if (!RegExp("^@latex\\s*\\{", "iu").test(wrapper) || !value.startsWith("{")) {
102        return value;
103    }
104    return unwrapLatexExpression(value).trim();
105};
106var replaceLatexWithMarkdownImage = function(text) {
107    return text.replace(RegExp("@latex\\s*([\\S\\s]+?)\\s*@endlatex", "giu"), function(match, expression) {
108        var value = normalizeLatexExpression(match, String(expression));
109        if (!value) {
110            return match;
111        }
112        var encoded = encodeRFC3986URIComponent(value);
113        return "![](".concat(LATEX_IMAGE_URL).concat(encoded, ")");
114    });
115};
116var normalizeEscapedBlockquoteMarkers = function(text) {
117    return text.replace(ESCAPED_BLOCKQUOTE_MARKERS_PATTERN, function(match, linePrefix, indentation) {
118        var markerText = match.slice(linePrefix.length + indentation.length);

119        return "".concat(linePrefix).concat(indentation).concat(markerText.replace(/>/g, ">"));
120    });
121};
122var getConverter = function() {
123    if (converter) {
124        return converter;
125    }
126    converter = new showdown.Converter({
127        tables: true,
128        strikethrough: true,
129        tasklists: true,
130        ghCodeBlocks: true,
131        smoothLivePreview: true,
132        openLinksInNewWindow: true,
133        disableForced4SpacesIndentedSublists: true,
134        splitAdjacentBlockquotes: true
135    });
136    return converter;
137};
138export var renderStreamingMarkdown = function(source) {
139    var rawText = source !== null && source !== void 0 ? source : "";
140    if (rawText.trim() === "") {
141        return "";
142    }
143    var markdownText = replaceLatexWithMarkdownImage(normalizeEscapedBlockquoteMarkers(rawText));
144    var html = getConverter().makeHtml(markdownText);
145    return normalizeTaskListStyles(wrapImagesWithLinks(normalizeCodeEntities(html)));
146};