add emojiCodeList option

etc/mfm-js.api.md

@@ -243,6 +243,7 @@ export type NodeType<T extends MfmNode['type']> = T extends 'quote' ? MfmQuote :
 // @public (undocumented)
 export function parse(input: string, opts?: Partial<{
     fnNameList: string[];
+    emojiCodeList: string[];
     nestLimit: number;
 }>): MfmNode[];
 

src/api.ts

@@ -5,9 +5,10 @@ import { MfmNode, MfmSimpleNode } from './node';
 /**
  * Generates a MfmNode tree from the MFM string.
 */
-export function parse(input: string, opts: Partial<{ fnNameList: string[]; nestLimit: number; }> = {}): MfmNode[] {
+export function parse(input: string, opts: Partial<{ fnNameList: string[]; emojiCodeList: string[]; nestLimit: number; }> = {}): MfmNode[] {
 	const nodes = fullParser(input, {
 		fnNameList: opts.fnNameList,
+		emojiCodeList: opts.emojiCodeList,
 		nestLimit: opts.nestLimit,
 	});
 	return nodes;

src/internal/index.ts

@@ -5,6 +5,7 @@ import * as P from './core';
 
 export type FullParserOpts = {
 	fnNameList?: string[];
+	emojiCodeList?: string[];
 	nestLimit?: number;
 };
 
@@ -12,6 +13,7 @@ export function fullParser(input: string, opts: FullParserOpts): M.MfmNode[] {
 	const result = language.fullParser.handler(input, 0, {
 		nestLimit: (opts.nestLimit != null) ? opts.nestLimit : 20,
 		fnNameList: opts.fnNameList,
+		emojiCodeList: opts.emojiCodeList,
 		depth: 0,
 		linkLabel: false,
 		trace: false,

src/internal/parser.ts

@@ -628,13 +628,23 @@ export const language = P.createLanguage({
 	emojiCode: r => {
 		const side = P.notMatch(P.regexp(/[a-z0-9]/i));
 		const mark = P.str(':');
-		return P.seq([
+		const parser = P.seq([
 			P.alt([P.lineBegin, side]),
 			mark,
 			P.regexp(/[a-z0-9_+-]+/i),
 			mark,
 			P.alt([P.lineEnd, side]),
-		], 2).map(name => M.EMOJI_CODE(name as string));
+		], 2);
+		return new P.Parser((input, index, state) => {
+			const result = parser.handler(input, index, state);
+			if (!result.success) {
+				return P.failure();
+			}
+			if (state.emojiCodeList != null && !state.emojiCodeList.includes(result.value)) {
+				return P.failure();
+			}
+			return P.success(result.index, M.EMOJI_CODE(result.value as string));
+		});
 	},
 
 	link: r => {