73 lines
1.8 KiB
TypeScript
73 lines
1.8 KiB
TypeScript
import { Tag } from "../deps.ts";
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import type { MarkdownConfig } from "../deps.ts";
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import { System } from "../../plugos/system.ts";
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import { Manifest, NodeDef } from "../manifest.ts";
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export type MDExt = {
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// unicode char code for efficiency .charCodeAt(0)
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firstCharCodes: number[];
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regex: RegExp;
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nodeType: string;
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tag: Tag;
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styles?: { [key: string]: string };
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className?: string;
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};
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export function mdExtensionSyntaxConfig({
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regex,
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firstCharCodes,
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nodeType,
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}: MDExt): MarkdownConfig {
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return {
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defineNodes: [nodeType],
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parseInline: [
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{
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name: nodeType,
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parse(cx, next, pos) {
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if (!firstCharCodes.includes(next)) {
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return -1;
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}
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const match = regex.exec(cx.slice(pos, cx.end));
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if (!match) {
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return -1;
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}
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return cx.addElement(cx.elt(nodeType, pos, pos + match[0].length));
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},
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// after: "Emphasis",
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},
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],
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};
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}
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export function mdExtensionStyleTags({ nodeType, tag }: MDExt): {
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[selector: string]: Tag | readonly Tag[];
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} {
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return {
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[nodeType]: tag,
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};
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}
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export function loadMarkdownExtensions(system: System<any>): MDExt[] {
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const mdExtensions: MDExt[] = [];
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for (const plug of system.loadedPlugs.values()) {
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const manifest = plug.manifest as Manifest;
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if (manifest.syntax) {
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for (const [nodeType, def] of Object.entries(manifest.syntax)) {
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mdExtensions.push(nodeDefToMDExt(nodeType, def));
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}
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}
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}
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return mdExtensions;
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}
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export function nodeDefToMDExt(nodeType: string, def: NodeDef): MDExt {
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return {
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nodeType,
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tag: Tag.define(),
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firstCharCodes: def.firstCharacters.map((ch) => ch.charCodeAt(0)),
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regex: new RegExp("^" + def.regex),
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styles: def.styles,
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className: def.className,
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};
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}
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