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1187856 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 | import React from "react";
import { contentValue, type LocalizedText } from "@/lib/i18n";
type InlineToken = {
kind: "strong" | "em" | "code" | "link" | "text";
value: string;
href?: string;
};
function isSafeHref(value: string): boolean {
return /^(https?:\/\/|mailto:|\/|#)/i.test(value.trim());
}
function tokenizeInline(value: string): InlineToken[] {
const tokens: InlineToken[] = [];
const expression = /(\*\*[^*]+\*\*|`[^`]+`|\[[^\]]+\]\([^\s)]+\)|\*[^*]+\*)/g;
let cursor = 0;
for (const match of value.matchAll(expression)) {
const index = match.index ?? 0;
if (index > cursor) tokens.push({ kind: "text", value: value.slice(cursor, index) });
const token = match[0];
if (token.startsWith("**")) tokens.push({ kind: "strong", value: token.slice(2, -2) });
else if (token.startsWith("`")) tokens.push({ kind: "code", value: token.slice(1, -1) });
else if (token.startsWith("[")) {
const link = /^\[([^\]]+)\]\(([^\s)]+)\)$/.exec(token);
if (link && isSafeHref(link[2])) tokens.push({ kind: "link", value: link[1], href: link[2] });
else tokens.push({ kind: "text", value: token });
} else tokens.push({ kind: "em", value: token.slice(1, -1) });
cursor = index + token.length;
}
if (cursor < value.length) tokens.push({ kind: "text", value: value.slice(cursor) });
return tokens;
}
export function MarkdownInline({ value }: { value: string }) {
const lines = value.split("\n");
return (
<>
{lines.map((line, lineIndex) => (
<React.Fragment key={`${lineIndex}-${line}`}>
{lineIndex ? <br /> : null}
{tokenizeInline(line).map((token, index) => {
if (token.kind === "strong") return <strong key={index}><MarkdownInline value={token.value} /></strong>;
if (token.kind === "em") return <em key={index}><MarkdownInline value={token.value} /></em>;
if (token.kind === "code") return <code key={index}>{token.value}</code>;
if (token.kind === "link") {
const external = /^https?:\/\//i.test(token.href || "");
return <a href={token.href} key={index} target={external ? "_blank" : undefined} rel={external ? "noreferrer" : undefined}>{token.value}</a>;
}
return <React.Fragment key={index}>{token.value}</React.Fragment>;
})}
</React.Fragment>
))}
</>
);
}
export function MarkdownBlocks({ value }: { value: string }) {
const lines = value.replace(/\r\n?/g, "\n").split("\n");
const blocks: React.ReactNode[] = [];
let index = 0;
while (index < lines.length) {
const line = lines[index];
if (!line.trim()) {
index += 1;
continue;
}
if (line.startsWith("```")) {
const language = line.slice(3).trim();
const code: string[] = [];
index += 1;
while (index < lines.length && !lines[index].startsWith("```")) {
code.push(lines[index]);
index += 1;
}
if (index < lines.length) index += 1;
blocks.push(<pre className="twb-markdown-code" key={`code-${blocks.length}`}><code data-language={language || undefined}>{code.join("\n")}</code></pre>);
continue;
}
const heading = /^(#{1,6})\s+(.+)$/.exec(line);
if (heading) {
const level = Math.min(5, heading[1].length + 2);
const Tag = `h${level}` as "h3" | "h4" | "h5";
blocks.push(<Tag key={`heading-${blocks.length}`}><MarkdownInline value={heading[2]} /></Tag>);
index += 1;
continue;
}
const unordered = /^[-*+]\s+(.+)$/.exec(line);
const ordered = /^\d+[.)]\s+(.+)$/.exec(line);
if (unordered || ordered) {
const orderedList = Boolean(ordered);
const values: string[] = [];
while (index < lines.length) {
const match = orderedList ? /^\d+[.)]\s+(.+)$/.exec(lines[index]) : /^[-*+]\s+(.+)$/.exec(lines[index]);
if (!match) break;
values.push(match[1]);
index += 1;
}
const List = orderedList ? "ol" : "ul";
blocks.push(<List key={`list-${blocks.length}`}>{values.map((item, itemIndex) => <li key={itemIndex}><MarkdownInline value={item} /></li>)}</List>);
continue;
}
const paragraph = [line];
index += 1;
while (
index < lines.length &&
lines[index].trim() &&
!lines[index].startsWith("```") &&
!/^(#{1,6})\s+/.test(lines[index]) &&
!/^[-*+]\s+/.test(lines[index]) &&
!/^\d+[.)]\s+/.test(lines[index])
) {
paragraph.push(lines[index]);
index += 1;
}
blocks.push(<p key={`paragraph-${blocks.length}`}><MarkdownInline value={paragraph.join("\n")} /></p>);
}
return <>{blocks}</>;
}
export function LocalizedMarkdown({
text,
inline = false,
}: {
text?: LocalizedText;
inline?: boolean;
}) {
const en = contentValue(text?.en);
const zh = contentValue(text?.zh);
if (!en && !zh) return null;
if (inline) {
return (
<>
{en ? <span className="i18n-en"><MarkdownInline value={en} /></span> : null}
{zh ? <span className="i18n-zh"><MarkdownInline value={zh} /></span> : null}
</>
);
}
return (
<>
{en ? <div className="twb-markdown i18n-en"><MarkdownBlocks value={en} /></div> : null}
{zh ? <div className="twb-markdown i18n-zh"><MarkdownBlocks value={zh} /></div> : null}
</>
);
}
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