367 lines
11 KiB
TypeScript
367 lines
11 KiB
TypeScript
import { copyable, h } from "./dom.js";
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import { diagram } from "./mermaid.js";
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import { taskStyle } from "./taskcolor.js";
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import { todoLink } from "./todolink.js";
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type Block = HTMLElement;
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export type ChoiceHook = (text: string) => HTMLElement | null;
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export type Options = { choice?: ChoiceHook; taskId?: string };
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const choiceMarker = /^(\([ *]\)|\[[ xX]\])\s+(\S.*?)\s*$/;
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const detailsOpen = /^\s*<details>\s*(?:<summary>(.*?)<\/summary>)?\s*$/i;
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const summaryLine = /^\s*<summary>(.*?)<\/summary>\s*$/i;
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const detailsClose = /^\s*<\/details>\s*$/i;
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const fence = /^\s*(```|~~~)\s*(\S*)/;
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const heading = /^(#{1,6})\s+(.*)$/;
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const bullet = /^(\s*)[-*+]\s+(.*)$/;
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const ordered = /^(\s*)(\d+)[.)]\s+(.*)$/;
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const quote = /^\s*>\s?(.*)$/;
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const rule = /^\s*([-*_])(\s*\1){2,}\s*$/;
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const tableSep = /^\s*\|?\s*:?-+:?\s*(\|\s*:?-+:?\s*)*\|?\s*$/;
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export function markdown(src: string, className = "md", opts: Options = {}): HTMLElement {
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return h("div", { class: className }, ...blocks(src.replace(/\r\n?/g, "\n").split("\n"), opts));
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}
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export function inlineMarkdown(src: string, opts: Options = {}): HTMLElement {
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return h("span", { class: "md-inline" }, ...inline(src, opts));
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}
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function blocks(lines: string[], opts: Options): Block[] {
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const out: Block[] = [];
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let i = 0;
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while (i < lines.length) {
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const line = lines[i]!;
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if (line.trim() === "") {
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i++;
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continue;
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}
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const f = fence.exec(line);
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if (f) {
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const marker = f[1]!;
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const body: string[] = [];
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i++;
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while (i < lines.length && !lines[i]!.trimStart().startsWith(marker)) {
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body.push(lines[i]!);
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i++;
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}
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i++;
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const lang = f[2]!.toLowerCase();
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if (lang === "mermaid") {
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out.push(diagram(body.join("\n")));
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continue;
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}
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if (lang === "diff" || lang === "patch") {
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out.push(copyable(h("pre", { class: "md-code diff" }, h("code", {}, ...body.map(diffLine)))));
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continue;
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}
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out.push(copyable(h("pre", { class: "md-code" }, h("code", {}, body.join("\n")))));
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continue;
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}
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if (detailsClose.test(line)) {
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i++;
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continue;
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}
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const d = detailsOpen.exec(line);
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if (d) {
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let title = d[1];
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i++;
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if (title === undefined && i < lines.length && summaryLine.test(lines[i]!)) {
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title = summaryLine.exec(lines[i]!)![1];
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i++;
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}
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const body: string[] = [];
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let depth = 1;
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while (i < lines.length) {
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const l = lines[i]!;
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i++;
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if (detailsOpen.test(l)) {
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depth++;
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} else if (detailsClose.test(l) && --depth === 0) {
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break;
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}
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body.push(l);
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}
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out.push(h("details", { class: "md-details" }, h("summary", {}, ...inline(title?.trim() || "Details", opts)), h("div", { class: "md-details-body" }, ...blocks(body, opts))));
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continue;
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}
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const hd = heading.exec(line);
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if (hd) {
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const level = Math.min(hd[1]!.length + 2, 6) as 3 | 4 | 5 | 6;
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out.push(h(`h${level}`, {}, ...inline(hd[2]!, opts)));
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i++;
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continue;
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}
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if (rule.test(line)) {
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out.push(h("hr"));
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i++;
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continue;
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}
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if (quote.test(line)) {
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const body: string[] = [];
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while (i < lines.length && quote.test(lines[i]!)) {
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body.push(quote.exec(lines[i]!)![1]!);
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i++;
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}
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out.push(h("blockquote", {}, ...blocks(body, { taskId: opts.taskId })));
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continue;
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}
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if (bullet.test(line) || ordered.test(line)) {
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const [list, next] = parseList(lines, i, opts);
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out.push(list);
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i = next;
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continue;
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}
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if (line.includes("|") && i + 1 < lines.length && tableSep.test(lines[i + 1]!)) {
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const rows: string[][] = [cells(line)];
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i += 2;
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while (i < lines.length && lines[i]!.includes("|") && lines[i]!.trim() !== "") {
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rows.push(cells(lines[i]!));
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i++;
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}
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out.push(table(rows, opts));
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continue;
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}
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const para: string[] = [];
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while (i < lines.length && lines[i]!.trim() !== "" && !startsBlock(lines, i)) {
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para.push(lines[i]!.trim());
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i++;
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}
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out.push(h("p", {}, ...joinLines(para, opts)));
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}
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return out;
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}
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function diffLine(l: string): HTMLElement {
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const cls = l.startsWith("@@") ? "hunk" : l.startsWith("+++") || l.startsWith("---") ? "meta" : l.startsWith("+") ? "add" : l.startsWith("-") ? "del" : "ctx";
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return h("span", { class: `line ${cls}` }, l + "\n");
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}
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function startsBlock(lines: string[], i: number): boolean {
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const line = lines[i]!;
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return (
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fence.test(line) ||
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detailsOpen.test(line) ||
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detailsClose.test(line) ||
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heading.test(line) ||
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rule.test(line) ||
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quote.test(line) ||
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bullet.test(line) ||
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ordered.test(line) ||
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(line.includes("|") && i + 1 < lines.length && tableSep.test(lines[i + 1]!))
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);
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}
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function joinLines(lines: string[], opts: Options): Node[] {
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const out: Node[] = [];
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lines.forEach((l, n) => {
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if (n > 0) {
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out.push(h("br"));
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}
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out.push(...inline(l, opts));
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});
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return out;
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}
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function indentOf(line: string): number {
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return line.length - line.trimStart().length;
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}
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function parseList(lines: string[], start: number, opts: Options): [HTMLElement, number] {
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const first = lines[start]!;
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const isOrdered = !bullet.test(first);
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const base = indentOf(first);
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const list = isOrdered ? h("ol") : h("ul");
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if (isOrdered) {
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const n = Number(ordered.exec(first)![2]);
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if (n !== 1) {
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(list as HTMLOListElement).start = n;
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}
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}
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let i = start;
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while (i < lines.length) {
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const line = lines[i]!;
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const m = isOrdered ? ordered.exec(line) : bullet.exec(line);
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if (!m || indentOf(line) !== base) {
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break;
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}
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const text = isOrdered ? m[3]! : m[2]!;
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const body: string[] = [text];
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i++;
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while (i < lines.length) {
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const next = lines[i]!;
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if (next.trim() === "") {
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const after = lines[i + 1];
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if (after !== undefined && indentOf(after) > base && after.trim() !== "") {
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body.push("");
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i++;
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continue;
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}
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break;
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}
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if (indentOf(next) <= base && (bullet.test(next) || ordered.test(next) || startsBlock(lines, i))) {
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break;
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}
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body.push(indentOf(next) > base ? next.slice(Math.min(indentOf(next), base + 2)) : next.trim());
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i++;
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}
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list.append(item(body, isOrdered ? { taskId: opts.taskId } : opts));
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while (i < lines.length && lines[i]!.trim() === "" && lines[i + 1] !== undefined && indentOf(lines[i + 1]!) === base && (isOrdered ? ordered : bullet).test(lines[i + 1]!)) {
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i++;
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}
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}
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return [list, i];
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}
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function item(body: string[], opts: Options): HTMLElement {
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const li = h("li");
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const m = opts.choice && choiceMarker.exec(body[0]!);
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const picker = m ? opts.choice!(m[2]!) : null;
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const detail = h("div", { class: "choice-detail" });
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if (picker) {
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li.className = "choice";
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li.append(picker);
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if (body.slice(1).some((l) => l.trim() !== "")) {
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picker.append(detail);
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}
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}
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const target = picker ? detail : li;
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const first = picker ? [] : [body[0]!];
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const rest = body.slice(1);
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if (rest.every((_, n) => !startsBlock(body, n + 1)) && !rest.includes("")) {
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target.append(...joinLines([...first, ...rest].map((l) => l.trim()), opts));
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return li;
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}
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const head: string[] = first;
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let k = 1;
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while (k < body.length && body[k] !== "" && !startsBlock(body, k)) {
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head.push(body[k]!.trim());
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k++;
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}
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target.append(...joinLines(head, opts), ...blocks(body.slice(k), opts));
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return li;
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}
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function cells(line: string): string[] {
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let s = line.trim();
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if (s.startsWith("|")) {
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s = s.slice(1);
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}
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if (s.endsWith("|")) {
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s = s.slice(0, -1);
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}
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return s.split("|").map((c) => c.trim());
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}
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function table(rows: string[][], opts: Options): HTMLElement {
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const [head, ...body] = rows;
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return h(
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"div",
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{ class: "md-table" },
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h(
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"table",
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{},
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h("thead", {}, h("tr", {}, ...head!.map((c) => h("th", {}, ...inline(c, opts))))),
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h("tbody", {}, ...body.map((r) => h("tr", {}, ...r.map((c) => h("td", {}, ...inline(c, opts)))))),
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),
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);
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}
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const inlineToken =
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/`([^`]+)`|\*\*(.+?)\*\*|__(.+?)__|\*([^*\s][^*]*?)\*|(?<![\w])_([^_\s][^_]*?)_(?![\w])|!\[([^\]]*)\]\((?:<([^>]+)>|([^)]+))\)|\[([^\]]+)\]\(([^)\s]+)\)|(https?:\/\/[^\s<>()]+[^\s<>().,;:!?'"])/;
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function inline(src: string, opts: Options): Node[] {
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const out: Node[] = [];
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let rest = src;
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while (rest.length > 0) {
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const m = inlineToken.exec(rest);
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if (!m) {
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out.push(document.createTextNode(rest));
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break;
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}
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if (m.index > 0) {
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out.push(document.createTextNode(rest.slice(0, m.index)));
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}
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const [whole, code, strong1, strong2, em1, em2, imgAlt, imgAngled, imgSrc, linkText, linkHref, bare] = m;
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if (code !== undefined) {
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out.push(h("code", {}, code));
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} else if (strong1 !== undefined || strong2 !== undefined) {
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out.push(h("strong", {}, ...inline(strong1 ?? strong2!, opts)));
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} else if (em1 !== undefined || em2 !== undefined) {
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out.push(h("em", {}, ...inline(em1 ?? em2!, opts)));
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} else if (imgAlt !== undefined) {
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out.push(image((imgAngled ?? imgSrc!).trim(), imgAlt, opts.taskId));
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} else if (linkText !== undefined) {
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out.push(link(linkHref!, inline(linkText, opts)));
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} else if (bare !== undefined) {
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out.push(link(bare, [document.createTextNode(bare)]));
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}
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rest = rest.slice(m.index + whole.length);
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}
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return out;
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}
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function link(href: string, children: Node[]): Node {
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if (/^https?:\/\//i.test(href)) {
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return h("a", { href, target: "_blank", rel: "noopener noreferrer" }, ...children);
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}
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const task = /^#\/task\/(\w+)(\/\w+)?$/.exec(href);
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if (task) {
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return h("a", { href, class: "task-link", style: taskStyle(task[1]!) }, ...children);
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}
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const todo = /^#\/todo\/(\w+)\/(.+)$/.exec(href);
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if (todo) {
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try {
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return todoLink(todo[1]!, decodeURIComponent(todo[2]!), children);
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} catch {
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return h("span", {}, ...children);
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}
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}
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if (href.startsWith("#/")) {
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return h("a", { href }, ...children);
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}
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return h("span", {}, ...children);
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}
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function worktreeImageURL(path: string, taskId: string | undefined): string | null {
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if (/^data:image\/(png|jpeg|gif|webp);/i.test(path)) {
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return path;
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}
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let file = path;
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if (/^file:\/\//i.test(file)) {
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file = decodeURI(file.slice("file://".length));
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} else if (/^[a-z][a-z0-9+.-]*:/i.test(file)) {
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return null;
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}
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if (!taskId) {
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return null;
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}
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return `/api/tasks/${encodeURIComponent(taskId)}/image?path=${encodeURIComponent(file)}`;
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}
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export function image(src: string, alt: string, taskId: string | undefined): Node {
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const url = worktreeImageURL(src, taskId);
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if (!url) {
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return link(src, [document.createTextNode(alt || src)]);
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}
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const img = h("img", { src: url, alt, loading: "lazy" });
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const el = h("a", { class: "md-img", href: url, target: "_blank", rel: "noopener" }, img);
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img.onerror = () => el.replaceWith(h("span", { class: "md-img-missing" }, `image not available: ${src}`));
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return el;
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}
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