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公告/单页对齐帖子详情三栏壳；时间线按日锚点可跳转，条目改为日志行并用暖金日期区分 feat 色。 Co-authored-by: Cursor <cursoragent@cursor.com>
103 lines
3.0 KiB
TypeScript
103 lines
3.0 KiB
TypeScript
import type { TocItem } from "@/components/PostToc";
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const TIMELINE_DAY_RE = /^##\s+(\d{4}-\d{2}-\d{2})\s+(.+)$/;
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const HEADING_RE = /^(#{2,3})\s+(.+?)\s*#*\s*$/;
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const HIDE_OPEN_RE = /^\[hide(?:\s+.+)?\]$/i;
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/** 时间线日分组锚点 id（与 MdTimeline 一致） */
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export function timelineDayId(date: string): string {
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if (/^\d{4}-\d{2}-\d{2}$/.test(date)) return `tl-${date}`;
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return `tl-${date.replace(/[^a-zA-Z0-9_-]+/g, "-").replace(/^-+|-+$/g, "") || "unknown"}`;
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}
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/**
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* 从正文提取目录：
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* - 块外 ## / ### → h-{n}（供 headingRenderer 按序挂 id）
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* - [timeline] 内按日期去重 → tl-YYYY-MM-DD（日分组锚点）
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* - 代码围栏 / [hide] 块内标题不计入
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*/
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export function extractToc(content: string): TocItem[] {
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const items: TocItem[] = [];
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let inCode = false;
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let inTimeline = false;
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let inHide = false;
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let headingCount = 0;
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/** 当前 timeline 块内出现过的日期（保持文件顺序，收块时再按日倒序发出） */
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let timelineDates: string[] = [];
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const timelineSeen = new Set<string>();
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const flushTimelineDates = () => {
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if (timelineDates.length === 0) return;
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const sorted = [...timelineDates].sort((a, b) => (a < b ? 1 : a > b ? -1 : 0));
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for (const date of sorted) {
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items.push({ level: 2, text: date, id: timelineDayId(date) });
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}
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timelineDates = [];
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timelineSeen.clear();
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};
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for (const raw of content.replace(/\r\n/g, "\n").replace(/\r/g, "\n").split("\n")) {
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const line = raw.trim();
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if (line.startsWith("```")) {
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inCode = !inCode;
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continue;
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}
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if (inCode) continue;
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const lower = line.toLowerCase();
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if (!inHide && !inTimeline && lower === "[timeline]") {
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inTimeline = true;
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continue;
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}
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if (inTimeline && lower === "[/timeline]") {
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inTimeline = false;
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flushTimelineDates();
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continue;
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}
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if (inTimeline) {
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const tm = TIMELINE_DAY_RE.exec(line);
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if (tm && !timelineSeen.has(tm[1])) {
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timelineSeen.add(tm[1]);
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timelineDates.push(tm[1]);
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}
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continue;
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}
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if (!inHide && HIDE_OPEN_RE.test(line)) {
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inHide = true;
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continue;
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}
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if (inHide && lower === "[/hide]") {
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inHide = false;
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continue;
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}
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if (inHide) continue;
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const m = HEADING_RE.exec(line);
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if (m) {
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items.push({
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level: m[1].length as 2 | 3,
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text: m[2],
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id: `h-${headingCount++}`,
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});
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}
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}
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// 未闭合的 timeline 也尽量发出已收集日期
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flushTimelineDates();
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return items;
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}
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/** 仅正文 Markdown 标题（排除时间线日锚点），供 headingRenderer 按序挂 id */
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export function markdownHeadingToc(toc: TocItem[]): TocItem[] {
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return toc.filter((t) => /^h-\d+$/.test(t.id));
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}
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/** 粗略阅读时长：约 400 字/分钟，至少 1 分钟 */
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export function estimateReadingMinutes(text: string, fallbackLen = 0): number {
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const len = text.trim().length > 0 ? text.trim().length : fallbackLen;
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return Math.max(1, Math.ceil(len / 400));
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}
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